KR102076572B1 - LED Lamp apparatus - Google Patents

Abstract

An LED lighting apparatus according to an embodiment of the present invention includes a plurality of LED light sources printed circuit boards mounted in a plurality of concentric circles; A first spacer disposed above the printed circuit board; A first diffusion member installed on the first spacer; A second spacer disposed above the first diffusion member; And a second diffusion member disposed on the upper side of the second spacer, wherein the plurality of LED light sources have a weak adjustment in light of a light source installed near the center of the light source than the light source disposed in the rim portion.

Description

LED lighting device {LED Lamp apparatus}

The present invention relates to an LED lighting device.

In general, a light emitting diode (LED) is a device that bonds a p-type semiconductor and an n-type semiconductor, and emits light while electrons and holes are bonded at the bonding surface. Since these LEDs can irradiate high-efficiency light with low voltage, they are used in home appliances, remote controls, electronic displays, and various automation devices, and are used as various lighting devices because they are eco-friendly and have excellent life and durability. Due to the above-described characteristics of the LED, conventionally used lighting devices such as incandescent lamps and fluorescent lamps are being replaced by lighting devices using LEDs.

The LED element used as a light source of the LED lighting device is made of a surface mount device (SMD) method for directly mounting on a printed circuit board (PCB), and the LED element is provided on the PCB in a plurality. Dogs are arranged in alignment and combined. The PCB is mounted on the body of the lighting device of a predetermined shape and installed in the lighting case.

Republic of Korea Patent Publication No. 10-2011-0113093 (2011.10.14.)

An object of the present invention is to provide an LED lighting device having a brightness uniformity of 99% or more in an area of a field of view or more that a camera module has so as to accurately determine the optical center of the camera module.

An LED lighting apparatus according to an embodiment of the present invention includes a plurality of LED light sources printed circuit boards mounted in a plurality of concentric circles; A support member installed on a bottom surface of the printed circuit board to support the printed circuit board and to perform heat dissipation; A first spacer disposed above the printed circuit board; A first diffusion member installed on the first spacer; A second spacer disposed above the first diffusion member; And a second diffusion member disposed on the upper side of the second spacer, wherein the plurality of LED light sources are characterized in that the light of the light source installed near the center is weakly adjusted than the light of the light source disposed at the edge portion.

The LED light source includes one first LED disposed in the center; A plurality of second LEDs spaced apart from the first LED by a first distance; A plurality of third LEDs spaced apart from the first LED by a second distance; And a plurality of fourth LEDs separated from the first LED by a third distance.

The first to fourth LEDs are LED lighting devices formed to have the same standard.

The ratio of the first distance, the second distance, and the third distance may be 1: 2: 3.

The brightness of the first to third LEDs may be 30 to 50% of the brightness of the fourth LED, and the brightness of the first to third LEDs is 40% of the brightness of the fourth LED. It can be formed of.

At this time, the brightness of the first to third LEDs may be controlled to be the same as each other.

The first spacer may have a reflective surface on the inner circumferential surface, and the reflective surface may have a Lambertian scattering property of 10 to 50%.

Further, the first and second spacers may be formed in a cylindrical shape.

The height of the first spacer may be formed higher than the height of the second spacer.

The thickness of the first diffusion member may be formed thicker than the thickness of the second diffusion member.

The first diffusion member may be formed of a diffusion plate, and the second diffusion member may be formed of a diffusion sheet.

Although a plurality of LED light sources are arranged in a circular shape, the brightness of the light source near the center and the brightness of the light source disposed on the outer edge are formed differently, but the brightness of the light source near the center is less than 40% compared to the brightness of the light source in the border area. It is possible to provide an LED lighting device having a uniformity of 99% or more in an area above the viewing angle of the module.

1 is a cross-sectional view schematically showing an example of an LED lighting device according to an embodiment of the present invention,
Figure 2 is a schematic plan view of Figure 1,
3 is a view showing different brightness areas of the LED lighting device according to an embodiment of the present invention,
4 and 5 is a graph showing the brightness performance of the LED lighting device according to the prior art, and
6 and 7 are graphs showing the brightness performance of the LED lighting device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 is a cross-sectional view schematically showing an example of an LED lighting device according to an embodiment of the present invention, FIG. 2 is a schematic plan view of FIG. 1, and FIG. 3 is a LED lighting device according to an embodiment of the present invention 4 and 5 are graphs showing the brightness performance of the LED lighting device according to the prior art, and FIGS. 6 and 7 are the brightness of the LED lighting device according to an embodiment of the present invention. This graph shows performance.

As shown in Figure 1, the LED lighting device according to an embodiment of the present invention is a support member 10, LED light source 11, the first spacer 20, the first diffusion member 30, the second spacer It may include 40 and the second diffusion member 50.

The support member 10 serves to support the printed circuit board 10a on which the LED light source 11 is mounted, and is formed of a metal material to discharge heat of the printed circuit board 10a to the outside. It is also possible to perform, but it is also possible that there is no separate support member, the LED lighting device according to an embodiment of the present invention is a printed circuit board (10a), LED light source (11), the first LED light source (11) mounted It may include a spacer 20, a first diffusion member 30, a second spacer 40 and the second diffusion member 50.

The LED light source 11 is mounted on the upper side of the printed circuit board 10a, and as shown in FIG. 2, a plurality of LED light sources 11 may be arranged in a circle.

According to an embodiment of the present invention, one first LED 11a is disposed at the center, and the second LED 11b is centered on a virtual circle of a first diameter centered on the first LED 11a. Is disposed, a third LED 11c is disposed around a virtual circle of a second diameter centered on the first LED 11a, and a fourth diameter is centered on the first LED 11a. The fourth LED 11d may be disposed around a virtual circle.

On the other hand, in the above-described embodiment, a total of four rows of LED light sources 11 are described as an example, but the present invention is not limited thereto, and the number of rows may increase or decrease depending on the size of the light source.

The object of the present invention is to improve the uniformity of the generated light, and in order to achieve this, the brightness of the LED light source 11 is adjusted differently from the brightness of the first to fourth LEDs 11a to 11d. It is in doing.

That is, according to an embodiment of the present invention, the brightness of the first to third LEDs 11a to 11c is adjusted equally, and the brightness of the fourth LED 11d is the above-described first to third LEDs 11a ~ 11c). At this time, the brightness of the fourth LED 11d may be formed to be the brightest, and the brightness of the first to third LEDs 11a to 11c is about 10 to 50% of the brightness of the fourth LED 11d. It can have brightness. At this time, as shown in FIG. 3, when the brightness of the fourth LED 11d is 100%, the brightness of the region S1 corresponding to the border portion may be formed to be the brightest, and the first to third The brightness of the area S2 in which the LEDs 11a to 11c are installed may be controlled darker than the brightness of the S1 area. According to an embodiment of the present invention, the brightness of the first to fourth LEDs 11a to 11d may be controlled such that the brightness of the S1 area is 100% and the brightness of the S2 area is 40%.

According to an embodiment of the present invention, one of the first LEDs 11a may be arranged at the center, but is not limited thereto, and two or more LEDs may be arranged. A plurality of second LEDs 11b may be arranged on a circumference of a virtual circle having a radius spaced a predetermined distance from the first LED 11a, and as illustrated, eight may be arranged to be equally spaced from each other. have.

In addition, a plurality of third LEDs 11c may be disposed on a circumference of a virtual circle having a radius that is twice the separation distance between the first LED 11a and the second LED 11b, as shown in the figure. Likewise, 18 can be arranged to be equally spaced from each other.

In addition, a plurality of fourth LEDs 11d may be disposed on the circumference of a virtual circle having a radius that is three times the separation distance between the first LED 11a and the second LED 11b, as shown in the figure. Likewise, 18 can be arranged to be equally spaced from each other.

The first spacer 20 forms an upper space portion of the LED light source 11 and may be formed to have a certain height H1. A reflective surface 21 is formed on the inner surface of the first spacer 20 to reflect the light of the LED light source 11 to maintain the brightness of the light as uniformly as possible. In this case, the reflective surface is 30 It may have a reflectivity of about%. In addition, the reflective surface 21 may have a lambbertian scatter property of 10 to 50%. The first spacer 20 may be formed of a cylindrical member such as a barrel.

The first diffusion member 30 is installed on the upper side of the first space 20 to scatter the light of the LED light source 11 to be uniformly distributed. The first diffusion member 30 may be formed of a diffusion plate. The diffusion plate diffuses the light emitted from the LED light source 11 along the surface so that the color and brightness are uniformly displayed on the entire screen and may be formed of a translucent material. The first diffusion member 30 may be formed of PET or PC material.

The second spacer 40 is disposed above the first diffusion member 30 and may be formed at a certain height H2, and a second diffusion member 50 is installed above the second spacer 40. Can be. The second spacer 40 may space the first and second diffusion members 30 and 50 apart by a predetermined distance, thereby scattering as much light as possible to form uniform light. Meanwhile, the height H2 of the second spacer 40 may be smaller than the height H1 of the first spacer 20.

The second diffusion member 50 may be formed of the same material as the first diffusion member 30 or may be formed of different materials. It can be varied according to the needs of material selection. The second diffusion member 50, like the first diffusion member 30, serves to scatter light of the LED light source 11 and make it uniform. The second diffusion member 50 may be formed of the same diffusion plate as the first diffusion member 30, or may be provided as a diffusion sheet.

On the other hand, the first spacer 20 and the second spacer 40 may have different heights, according to an embodiment of the present invention, the height of the first spacer 20 is the second spacer 40 ). According to this configuration, light is scattered by the light reflected from the reflective surface 21 formed on the inner circumferential surface of the first spacer 20, so that the brightness of the light can be formed as uniformly as possible.

In addition, in the case of the first diffusion member 30 and the second diffusion member 50, the first diffusion member 30 is formed to make the thickness of the first diffusion member 30 thicker, so that the first diffusion member 30 is relatively thick. It is possible to form the brightness as uniformly as possible, and the second diffusion member 50 is formed to be relatively thinner than the first diffusion member 30 to increase the transmittance of light passing therethrough.

4 and 5 are graphs showing the brightness performance of the LED lighting device according to the prior art. As shown, in the case of the existing test light source, it had to be placed as close as possible to the camera module in order to obtain 99% uniformity, and it had to be used at a very close distance of about 5 to 6 mm.

However, the LED lighting device according to an embodiment of the present invention can improve the design freedom of the test equipment because it can obtain 99% uniformity even if it is 21 mm apart from the camera module under test as shown in FIGS. 6 and 7. have.

According to the present invention as described above, considering that the light scattering phenomenon is greater in the border portion of the light according to the characteristics of the LED lighting, the light of the LED light source in the border portion is formed stronger, and the LED light source near the center is relatively The light of the lighting device can be uniformly formed by adjusting it weakly.

The embodiments of the present invention described above and illustrated in the drawings should not be construed as limiting the technical spirit of the present invention. The scope of protection of the present invention is limited only by the matters described in the claims, and a person having ordinary knowledge in the technical field of the present invention can improve and modify the technical spirit of the present invention in various forms. Therefore, such improvements and modifications will fall within the protection scope of the present invention as long as it is apparent to those skilled in the art.

10; Support member 10a; Printed circuit board
11; LED light source 11a; 1st LED
11b; Second LED 11c; 3rd LED
11 dl 4th LED 20; First spacer
30; A first diffusion member 40; 2nd spacer
50; Second diffusion member

Claims (14)

A printed circuit board in which a plurality of LED light sources are mounted in a plurality of circles;
A first spacer disposed above the printed circuit board;
A first diffusion member installed on the first spacer;
A second spacer disposed above the first diffusion member; And
It includes; a second diffusion member disposed on the second spacer;
The first spacer has a reflective surface on the inner peripheral surface,
In the plurality of LED light sources, the light of the light source installed near the center is weakly adjusted than the light of the light source disposed at the edge portion,
The plurality of LED light sources,
One first LED disposed in the center;
A plurality of second LEDs spaced in the radial direction by a first distance from the first LED and arranged to form a virtual circle having a first diameter;
A plurality of third LEDs spaced in the radial direction by the first LED and a second distance, and arranged to form a virtual circle having a second diameter; And
And a plurality of fourth LEDs spaced in the radial direction by the first LED and a third distance, and arranged to form a virtual circle having a third diameter,
The fourth LED is formed brighter than the first to third LED,
The first to third LEDs have the same brightness,
The second diameter is shorter than the third diameter and is formed longer than the first diameter,
The first diffusion member is formed of a diffusion plate,
The second diffusion member is formed of a diffusion sheet,
The upper and lower heights H1 of the first spacer are formed higher than the upper and lower heights H2 of the second spacer,
The thickness of the first diffusion member is formed thicker than the thickness of the second diffusion member,
The LED light source is a LED lighting device for testing the camera module spaced at least 21mm from the camera module.
According to claim 1,
LED lighting device for testing the camera module including a support member installed on the bottom of the printed circuit board to support the printed circuit board and perform a heat dissipation function.
According to claim 1,
The fourth LED is an LED lighting device for testing a camera module in which a radial length to an edge of the printed circuit board is shorter than a radial length to the third LED.
According to claim 1,
The ratio of the first distance, the second distance, and the third distance is 1: 2: 3 LED lighting device for camera module test.
According to claim 1,
The LED lighting device for testing the camera module, wherein the brightness of the first to third LEDs is 30 to 50% of the brightness of the fourth LEDs.
The method of claim 5,
The LED lighting device for testing the camera module, wherein the brightness of the first to third LEDs is 40% of the brightness of the fourth LEDs.
delete The method of claim 3,
The first to fourth LEDs are LED lighting devices for testing camera modules formed to have the same specifications.
delete The method of claim 1, wherein the reflective surface,
LED lighting device for camera module testing with 10-50% Lambertian scattering properties.
According to claim 1,
The first and second spacers are formed of a cylindrical LED lighting device for testing the camera module.


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