KR100194845B1 - Assembly type LED lamp - Google Patents

Abstract

[purpose]

It is to provide an assembly lamp with less usage restrictions that realizes more homogeneous waterproofing properties and improves visibility.

[Configuration]

The collective type LED lamp of the present invention can be replaced with an external light removal hood, which is often mounted around the case, particularly around the upper side, in a replaceable configuration, and can have a different configuration of the hood depending on the use situation of the collective lamp. In addition, the work of assembling the hood itself fixes the LED substrate to the case, and dispersion of the water surface is suppressed in potting of the waterproof resin.

In addition, the LEDs are arranged in the same direction by arranging the rows of the leads. In particular, when the LEDs are inclined from the vertical and horizontal sides of the substrate, the light distribution characteristics are spread in the direction perpendicular to the column direction of the leads. It can spread in the photographic direction, can be strongly distributed in any direction at the time of design, and the visibility can be improved according to the purpose.

Description

Collective LED lamp

1A and 1B are a longitudinal sectional view and a front view of the collective LED lamp of the present invention.

2A to 2C are external views showing an embodiment of a lamp hood shape.

3A to 3C are arrangement diagrams of LEDs of the collective LED lamps.

4 is a circuit diagram of the LED of the assembly LED lamp.

5A to 5C are explanatory diagrams of a substrate of a collective LED lamp and light distribution characteristics of the collective lamp using the same;

6A and 6B are explanatory diagrams of a substrate (for substrate holding) of an integrated LED lamp.

7A and 7C are external explanatory diagrams of LEDs.

8A and 8C are explanatory diagrams showing an example of installation of a collective LED lamp.

9A and 9B are schematic diagrams of specific assembly LED lamp modules of a matrix installation.

FIG. 10 is a schematic structural diagram of a substrate used in the FIGS. 9A and 9B module.

* Explanation of symbols for main parts of the drawings

1: assembly lamp (assembly type LED lamp) 2: LED engine

3: lamp hood 4: case body

5: heat radiation fin (FIN) 6: wire extraction hole

7: jig for fixing lamp (or bolt) 8: packing

9: waterproofing resin (porting resin) 10: LED (RGB)

11: CRD 31: hook portion of the lamp hood

41: hinge portion of the case body 60: large engine

61: portion to cut out the substrate 62: C chamfer

63: R-shaped corners 64: cut out portion

71: lead 72: stopper portion

90: assembly module 91: module substrate

[Industrial use]

The present invention relates to a collective type LED lamp including at least one LED each having three different colors, in particular, three RGB colors, and more particularly, to a collective type LED lamp used in a display module used outdoors.

[Description of the Prior Art]

Conventionally, since one LED lamp is difficult to form an LED that emits RGB light, the LEDs of each color are collectively arranged and configured as one lamp, which is configured as an RGB collective LED lamp (hereinafter referred to as an 'assembly lamp'). Is done. By gathering each color of RGB, the display of the entire color becomes possible. Therefore, a brighter blue LED is needed to mix well with this set lamp, and recently, the manufacture of high-brightness gallium nitride (GaN) blue LED Since it is reported, the use of a blue light emitting diode (LED) made of gallium nitride (GaN) semiconductor is considered.

Collective lamps have a relatively large configuration in order to form a plurality of small LEDs, and are often used in large display panels and the like, and often used outdoors. In such a case, the display of the collective lamp used for the display panel is sometimes difficult to see due to the brightness of sunlight during the daytime normally used. This is the same phenomenon in which traffic signals are hard to see by irradiation with sunlight, and it is a factor that hinders the purpose of improving display or visibility. For this reason, a hood for blocking external light is provided above the lamp like a traffic signal. This hood is often a part of the case of the collective lamp, and has a structure in which the light emitting part is exposed for efficient use of the LED. For this reason, since the board | substrate which installs LED cannot be accommodated in a case inside, it is comprised so that a board | substrate may be inserted and the lead side of LED is filled with waterproof resin. Also, in order to make it brighter, the operating current of the LED may be set near the upper limit.

[Problem to Solve Invention]

The collective lamp is not limited to being usually used outdoors but necessarily outdoors, and is not limited to being installed in a place exposed to sunlight even in the outdoors, and sometimes a hood is unnecessary. However, in the conventional configuration, since the hood is integrated, it can not be easily removed even if it becomes unnecessary, but on the contrary, the visibility of the display may be hindered indoors. In addition, the lead side of the LED is embedded with a waterproof resin for waterproofing and protection, but potting the waterproof resin by fixing the substrate in the process of manufacturing this structure. At that time, the substrate was not fixed, the light distribution characteristics were dispersed, and the potting resin leaked into the case, and the resin surface was not uniform, and there was a concern that the waterproof function would not be sufficient, and there was a problem of deterioration in quality. . Moreover, when soldering LEDs installed on the board, the position is unstable in the state where each LED is inserted into the through hole of the board, and when the fixing is fixed by soldering, dispersion occurs at each installation angle, which affects the visibility of the assembly lamp. There is also.

Accordingly, an object of the present invention is to provide an assembly lamp which improves visibility, realizes a more homogeneous waterproof property, and has fewer restrictions on use.

[Means for solving the problem]

In the present invention for solving the above problems, in a collective type LED lamp having RGB three primary colors and having at least one LED arranged as one display module, the supporting substrate of the LED is the front of the cover module. It is fitted to the fitting hood of the fixed and has a structure in which the support substrate and the lead portion of the LED is sealed with a waterproof resin.

Another configuration of the invention is characterized in that the mounting of the LED to the support substrate is arranged in such a way that the column directions of the two lead terminals of the LED are arranged, in which the column direction is the length of the matrix arrangement of the LED. It is characterized by being disposed inclined in the direction or transverse direction.

[Action]

The external light removal hood, which is often mounted around the case in which the LED lamp is installed, particularly around the upper side, can be replaced with a replaceable configuration, and the hood shape can be made different depending on the use situation of the collective lamp. In addition, the hood itself is fixed to the case by fixing the LED substrate to the case, preventing the potting material from leaking out, and potting of the waterproof resin prevents the surface from being disturbed. Therefore, as the LED is installed, the rows of leads are arranged in the same direction, and in particular, in the direction inclined from the longitudinal and horizontal directions of the substrate, the light distribution characteristics become wider in the direction perpendicular to the column direction of the leads. Widen in the true direction.

[Effects of the Invention]

According to the configuration of the present invention as described above, an easy-to-use assembly lamp having a high versatility and a waterproof performance is provided, and the visibility in a specific direction can be improved according to the purpose because the degree of freedom to strongly distribute light in a specific direction is large. .

DESCRIPTION OF THE PREFERRED EMBODIMENTS

The present invention will now be described based on specific embodiments.

As an example of the collective lamp 1 of this invention, the sectional drawing in the case where there is a hood only on the lamp upper surface side as an outdoor hood is shown to FIG. 1A and 1B. FIG. 1A shows an AA cross section on the display surface shown in FIG. 1B as the longitudinal section thereof, and the LED substrate 2 is fixed by being fitted with the lamp hood 3 being fitted into the case body 4 of the collective lamp. . In the LED board | substrate 2 shown here, 5x5 LEDs are arrange | positioned, As can be judged by sectional drawing, the lead of the LED 10 is aligned neatly on the board | substrate 2, and the through provided in the board | substrate 2 is shown. It is soldered to the wiring portion behind the substrate in a hole (not shown). Therefore, it is connected to an external control circuit or the like from the wire extraction hole 6 by an electric wire (not shown) and conduction control and instruction are performed.

On the rear side of the case body 4, a lamp fixing tool 7 for temporarily fixing the assembly lamp 1 to a display panel or the like is mounted. Normally, the panels are also waterproofed using a packing 8 or the like. In addition, the outer peripheral portion of the case is formed with a groove portion is formed so that the case portion to the heat radiation fin (fin, 5).

The lamp hood 3 has a hook portion 31 formed at a fitting portion thereof, and is fitted into a fixing hinge portion 41 on the case side so that the LED substrate 2 is placed on the case 4 at the end face of the lamp hood 3. Is fixed to the stairs attachment part. Thereafter, potting is carried out with a silicone resin or other waterproofing resin 9 between the gaps of the LEDs 10 to prevent moisture from entering the lead portions of the LEDs. This potting is performed by injecting a waterproof resin between the gaps of the rows of LEDs by a dispenser or the like. In that case, since the board | substrate 2 is fixed by the hood 3 reliably, no leakage of filling of resin arises and a lack of filling does not occur. Therefore, the surface of the water is always guaranteed a certain waterproof.

Since the lamp hood 3 fixing the LED substrate 2 is fitted, it is possible to select any type as the hood shape, and as shown in Figs. 2A to 2C, a hood having a shape suitable for the purpose of use is shown. The range of application can be widened. FIG. 2A is an external view of the shape shown in FIG. 1, but, for example, when installed in a place where external light normally shines from the right side of the collecting lamp, the visibility of the collecting lamp is changed by making the hood wider as shown in FIG.視 認 性 can be improved. That is, it is a shape characterized in that the hood (lamp hood) fitted in the front of the display module has a cover portion that prevents external light from the right direction or the left direction.

In addition, you may use what surface-treated the surface inside of a hood so that LED light may not reflect and reflect. That is, the thing which multiply wrinkled on the surface of the hood is used.

In addition, when installed in a place where there is no external light indoors or the like, it is sufficient to say that it is a lamp hood without a hood, that is, a cap for fixing an LED substrate, so that it can be seen in any direction. That is, the fitting hood (lamp hood) of the front of the display module is characterized in that it does not have a surrounding cover. In this way, the case body on the LED fixing side can be coped with any type of use, and thus, it is a collective lamp having high versatility.

This collective lamp 1 has the visibility of colors according to the arrangement of 5x5 RGB tricolor LEDs, or the difference of the brightness of each color LED, and the viewing direction of white which is a mixture of three colors affects visibility. Crazy In particular, in the case of adopting a type having a low luminance in a blue LED, a difference occurs at the minimum distance at which white appears due to the arrangement, which affects the display ability of the display panel. Therein, the arrangement of each color LED is recognized as white at the shortest distance by the arrangement shown in Figs. 3A to 3C. In FIG. 3a, five red LEDs and eight green LEDs are used for twelve blue LEDs, and various colors are distributed and arranged as shown in the drawing. In the arrangement of FIG. 3B, four red LEDs are arranged. It has 9 green LEDs and 12 blue LEDs. The use of the blue LEDs in this way is for use in a form in which the brightness of the blue LEDs is weak, and another arrangement has an effect in having different luminance. In addition, since blue LEDs are not pure blue, blue LEDs are often used to increase blue components. Conversely, when using blue LEDs with luminance as shown in FIG. 3C, the number of blue LEDs may be reduced and the number of green LEDs may be increased.

When the number of blue LEDs is used in this way, in order to secure the luminance of the blue LEDs, the blue LEDs are connected in parallel to form a circuit as shown in FIG.

That is, five red LEDs are connected in series to the red (R) terminal, and two circuits in series of four green LEDs are connected in parallel to the green (G) terminal. Thus, two blue LEDs are connected in parallel to the blue (B) terminal. Since blue LEDs have dispersion in the magnitude of the driving current, a current regulator diode (CRD) that makes the driving current constant may be used to homogenize the luminance of each blue LED. That is, the constant current diode may be connected in series with at least the blue LED power supply circuit of the LED power supply circuit. With such a configuration, not only dispersion | distribution of the color development of a blue LED improves, but also visibility is improved, control of assembly lamp drive becomes simple, and the apparatus becomes compact in the display panel etc. which collect collective lamps are formed.

In addition, the installation of the heat radiation fins 5 at the rear of the case body 4 usually ensures the brightness of the blue GaN-LED, so that the energizing current to be used tends to be large. It is a matter of course that there is a problem that there is a possibility that this may occur, and if the configuration is not taken practically and there is no problem in practical use, the configuration may not be a configuration in which heat radiation fins are provided but a configuration that allows ventilation only through space.

As a board | substrate which arranges LED of an assembly lamp, the printed board of glass epoxy light (for example, CEM-3) is used. When soldering the LED to the board, most solders are soldered by immersing the side of the board to be soldered with molten lead using a lead reflow. However, since the LED is in a free state until the lead is fixed, its LED may be caused by mechanical vibration or the like. It is distributed in the installation direction. Since the dispersion becomes statistical, on the average, the light distribution characteristic of the collective lamp shows a constant tendency and is distributed in the direction perpendicular to the column direction of the LED lead. Therefore, the visibility has the effect of spreading not only by the front of the lamp but also by this dispersion. Therefore, when all the column directions of the LED leads are arranged and tilted in the longitudinal and horizontal directions of the substrate, and the light distribution characteristics are inclined, the collective lamp is in a specific direction. It is possible to increase the visibility. Specifically, as shown in FIG. 5A or FIG. 5B, an arrangement in which the through-hole row (k line direction) into which the lead of the LED substrate is inserted is inclined from the longitudinal and horizontal sides of the substrate (about 45 degrees in FIGS. 5A to 5C). ), It spreads in the direction perpendicular to the row of through holes (p-line direction) as in the light distribution characteristic shown in FIG. 5C. By varying the inclination of the light distribution characteristic in the x-direction and the y-direction, it is possible to obtain a light distribution characteristic suitable for the purpose of use. In addition, FIG. 5A shows a through hole (a small circle with a hatch in the drawing) on one side of the board | substrate 2 which solders the electric wire connected to the LED board | substrate 2, FIG. 5B is an example arrange | positioned on both sides. .

In addition, although the shell type of 3 mm is used here as an LED to be used, the space | interval of a lead terminal becomes 2.5 mm and the scroll of a wiring pattern becomes dense in this LED. Conventionally, there are many ø5 mm, and scrolling of wiring patterns was not a problem. Or there is a situation that the integration is not more than that, and if the compact structure like the present invention is required, the arrangement of the LEDs considering the scrolling of the wiring becomes necessary, but the arrangement shown in FIG. There is also an advantage to deploy.

Since such LED board | substrate 2 is mass-produced, one large board | substrate is normally processed and formed. The configuration diagram of the large-sized substrate 60 for holding a substrate shown in FIG. 6A shows, as one example, a configuration in which 16 LED substrates 2 are collected from one large substrate 60. In addition, in FIG. 6A and 6B, the through hole of the LED board | substrate 2 is abbreviate | omitted and shown. As the specification required for the LED substrate 2, the land portion of the printed wiring to be formed and soldered to the assembly lamp case body 4 so that the LED substrate 2 is tight is formed, but as an external dimension, this large substrate ( 60 is determined in the cut out portion 61 and the cut out portion 64 for separation, and the double cut out portion has a dimensional accuracy so that the R shape of the LED substrate 2 can be obtained to obtain the required degree for assembly. Each of the sections 63 is a shape in which a quarter-shaped curved R surface is taken, and each of the cut portions 64 is formed in a C chamfered shape.

As shown in FIG. 6B, the cutout portion 64 of the LED substrate 2 attaches about 45 degrees of cut-out from the top and bottom of the substrate 60 to the middle of the substrate, and mounts the solder by mounting the LED as it is. Then, a wire (not shown) attached with a terminal is soldered to each wire through hole of the LED substrate 2 to bend and separate each LED substrate 2 in the final step. In addition, if the through-hole for the wire is provided with a land portion on the lead side of the LED, the hole may be clogged during the soldering of the LED. Therefore, it is preferable to install the land portion only on the opposite side of the LED. In addition, soldering of this electric wire is performed after LED soldering process.

In addition, as shown in FIGS. 1A and 1B in a state where the LED lead 71 of the LED has passed through the LED substrate 2, the shell portion of the LED 10 is separated from the substrate 2 and thus the shell is disposed. The lead portion below the portion needs to be disposed on the substrate 2 in an extended state. Therefore, in order to prevent the LED 10 from coming into close contact with the substrate 2, the lead 71 is subjected to a machining in the form of a lead as shown in FIGS. 7A (front view) and 7B (side view). When inserting it into the through hole of the board | substrate 2, it is made so that the bottom part of the shell part of LED10 may not enter. Alternatively, as shown in FIG. 7C, the stopper portion 72 may be provided in the shape of the lead 71.

Second Embodiment

Various arrangement patterns are considered as the usage form of the collective lamps, but most of them are matrix-like arrangements as shown in FIG. 8A to constitute a large full color display. It is also used as a large segment display device as shown in FIG. 8B. Moreover, it is not limited to a specific shape, It does not matter even if it is the arrangement | positioning required, for example, the arrangement like the circle shape of FIG. 8C.

Third Embodiment

The matrix arrangement shown in FIG. 8A is constructed by arranging one collective lamp in a matrix, while FIG. 9A is also a module 90 in which collective lamps are arranged in a plurality of matrices. 9A and 9B, one collective lamp is represented by 3x3 LEDs, but the same is true of 5x5 or nxn. The module 90 is a display unit in which one collective LED lamp is arranged in one dot by arranging 16 collective lamps each vertically and horizontally. That is, the module 90 which displays a character of 16x16 dots. As shown in the sectional view of FIG. 9B, the module 90 is different from the assembled state of FIG. 8A, and the case of the assembly lamp is integrally formed. That is, the LED board | substrate 91 is made into one module board | substrate 91 common to 16x16 lamps. As shown schematically in FIG. 10, the substrate 91 is arranged in a line (k line) inclined in the longitudinal and horizontal direction of the substrate 91, so as to arrange the light distribution characteristics of the LED. . Therefore, the module 90 as a whole has the same characteristics as the light distribution characteristic of one unit (set lamp). This module 90 also has a high degree of freedom in selecting light distribution characteristics at the design stage since the two leads of the LED are arranged inclined rows.

The column direction of the two lead terminals of the LED in the scope of the claims means that two lead terminals of a normal shell type LED are extended in parallel and are shown in the direction or the surface of FIG. 5 caused by these two leads. As shown in Fig. 5, the length of the through-holes of the substrate passing through the leads is its direction, and the longitudinal or horizontal direction of the matrix arrangement of the LEDs is the edge direction of the substrate shown in FIG. , Xy coordinate axis direction in FIG. 5C).

The assembly type LED lamp which improved visibility by the structure of this invention as mentioned above is obtained.

Claims (3)

In a collective type LED lamp having RGB primary colors and arranging at least one LED of each color in a single display unit, the supporting substrate of the LED is fixed to the fitting hood in front of the display module. The collective type LED lamp which has a structure which sealed the support substrate and the lead part of the said LED with waterproof resin. In a collective type LED lamp having RGB three primary colors and arranging at least one LED of each color in one display unit, the installation of the LEDs to the supporting substrate comprises two lead terminals of the LEDs of the entire RGB. Collective LED lamp, characterized in that arranged in a row direction. 3. The collective type LED lamp of claim 2, wherein the column direction is an inclined arrangement in the longitudinal or transverse direction of the matrix arrangement of the LEDs.