JP2003029668A - Led display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the cost of an LED display device using LED lamps and to easily detach the LED lamps from a substrate for repair or exchange after the production of the LED display device. SOLUTION: A plate-like high-elasticity member 1 having through holes 1a of a diameter smaller than that of LED lamps 21R, 21G and 21B covers the front face of a substrate 31, on which the LED lamps 21R, 21G and 21B are arranged, in the state of inserting the LED lamps 21R, 21G and 21B to the through holes 1a. Thus, even without sealing the electrode terminals of the LED lamps 21R, 21G and 21B by potting, the corrosion of the electrode terminals of the LED lamps 21R, 21G and 21B by rain water or dust or destruction of the LED lamps 21R, 21G and 21B by static electricity can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an LED display device using an LED (light emitting diode) lamp, and in particular,
The present invention relates to an LED lamp characterized by a structure for protecting electrode terminals.

[0002]

2. Description of the Related Art LED display devices using LED lamps are widely used as indoor and outdoor image display devices.

FIG. 6 shows a general structure of an LED lamp. An LED chip 11 of a specific emission color is installed on an elongated electrode terminal (cathode) 12, connected to an electrode terminal (anode) 13 by wire bonding, and covered with a shell-shaped resin 14 to form an LED.
The lamp is configured.

FIG. 7 schematically shows components of a panel portion of a conventional LED display device using such an LED lamp. Further, FIG. 8 shows in detail a cross section of a panel portion constituted by each element of FIG. 7.

As shown in FIG. 7, on the substrate 31, red,
LED lamps 21R, 21G, 21 for each green and blue emission color
B as one set, a plurality of sets of LED lamps 21R, 21R
G and 21B are arranged in a matrix. 1 pair of L
One pixel is formed by the ED lamps 21R, 21G, and 21B. (Hereafter, LED lamps 21R, 21G,
21B is collectively referred to as the LED lamp 21. )

The substrate 31 is attached so as to be fitted into a tray-shaped casing 32. As shown in FIG. 8, after the board 31 is attached to the housing 32, the LED is provided on the inside of the housing 32 above the board 31 (on the left side in the drawing).
The electrode terminals of the lamp 21 (electrode terminals 12 and 1 in FIG. 6)
To seal 3), a resin 34 such as silicone resin or urethane resin is potted.

The front surface of the substrate 31 (the surface on which the LED lamp 21 is arranged) is covered with a mask louver 33. The mask louver 33 is a plate-shaped member made of polycarbonate and has through holes 33 a corresponding to the positions of the LED lamps 21 on the substrate 31. This through hole 33a
The diameter of the LED lamp 21 is set to be slightly larger than the standard diameter of the LED lamp 21 in consideration of the fact that the actual diameter of each LED lamp 21 (the diameter of the shell-shaped resin portion) varies slightly. .

On the front surface of the mask louver 33 (the surface not facing the substrate 31), the upper portion of each pixel row in the horizontal direction projects forward in an eaves-like shape. This eaves-shaped part
It has a function of preventing a human finger or the like from touching the LED lamp 21, and a function of suppressing the incidence of external light on the LED lamp 21.

As shown in FIG. 8, a shell-shaped resin portion (resin 14 in FIG. 6) of each LED lamp 21 is passed through the through hole 33a. Since the diameter of the through hole 33a is larger than the standard diameter of the LED lamp 21, the LED lamp 2
Even when 1 is passed through, there is a gap in the through hole 33a that extends from the front surface of the mask louver 33 to the back surface (the surface facing the substrate 31).

The resin 34 for sealing the electrode terminals of the LED lamp 21 has a function of preventing the corrosion of the electrode terminals due to rainwater and dust entering from the outside through the gap of the through hole 33a, and a mask of a human finger or the like. When the louver 33 approaches or touches the louver 33, the LED lamp 21 is prevented from being destroyed by static electricity generated in the electrode terminal through the gap of the through hole 33a.

As described above, in the conventional LED display device using the LED lamp, the electrode terminals of the LED lamp are potted in order to prevent the electrode terminals of the LED lamp from being corroded by rainwater or dust and the LED lamp being destroyed by static electricity. Was sealed by.

[0012]

However, in this way L
Sealing the electrode terminals of the ED lamp by potting requires material cost and processing cost, which leads to high cost of the LED display device, and for repairing or replacing the LED lamp after manufacturing the LED display device. It is difficult to remove from the board (in some cases, the LED lamp must be removed from the board, and the entire panel portion including the board and the housing must be replaced with a new one). .

In view of the above points, the present invention has been made to solve the above-mentioned conventional inconveniences associated with an LED display device using an LED lamp.

[0014]

In order to solve this problem, the present applicant has proposed, in an LED display device using an LED lamp, a plate-shaped high elasticity having a through hole having a diameter smaller than the diameter of the LED lamp. The member has the LE in the through hole.
It is proposed to cover the front surface of the substrate on which the LED lamp is arranged with the D lamp inserted.

In this LED display device, the mask louver 33 shown in FIGS. 7 and 8 is made of a polycarbonate having poor elasticity and is not a member having a through hole having a diameter larger than that of the LED lamp, but rather a member of the LED lamp. A plate-shaped high-elasticity member having a through hole with a diameter smaller than the diameter covers the front surface of the substrate on which the LED lamp is arranged. Then, the LED lamp is inserted into the through hole by closely adhering to the through hole by expanding the diameter by utilizing the elasticity of the high elastic member.

As described above, by inserting the LED lamp in close contact with the through hole of the high elastic member covering the front surface of the substrate on which the LED lamp is arranged, the through hole extends from the front surface to the back surface of the high elastic member. There is no gap.
Therefore, rainwater or dust does not enter from the outside through the through hole, and even if a human finger approaches or touches the plate-like member, the electrode terminal of the LED lamp can pass through the through hole. Does not generate static electricity.

As a result, even if the electrode terminals of the LED lamp are not sealed by potting, LE caused by rainwater or dust
Corrosion of the electrode terminals of the D lamp and destruction of the LED lamp due to static electricity are prevented, so that the conventional inconvenience caused by sealing the electrode terminals of the LED lamp by potting is eliminated.

In this LED display device, as an example, it is preferable that a portion of the front surface of the high-elasticity member that is above each pixel row in the horizontal direction is protruded forward in an eaves-like shape.

As a result, as with the mask louver 33 shown in FIGS. 7 and 8, this highly elastic member prevents a human finger or the like from touching the LED lamp and prevents external light from reaching the LED lamp. It also becomes possible to suppress the incidence.

Alternatively, a plate-shaped second member having a flat front surface of the high-elasticity member, having a through hole, and having an upper portion of each pixel row in the lateral direction protruding forward in an eaves-like shape, You may make it cover the front surface of this high elasticity member in the state which let the LED lamp pass through this through hole.

[0021] As a result, a function of preventing a human finger or the like from touching the LED lamp and a function of suppressing the incidence of external light on the LED lamp are provided in the second elastic member different from the highly elastic member.
Will be fulfilled. As the substance forming the second member, it is possible to select a substance excellent in weather resistance even if it has poor elasticity, so that it is possible to prevent the human finger from touching the LED lamp, and the LED lamp. The function of suppressing the incidence of external light on the surface can be achieved by a member having excellent weather resistance.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be specifically described below with reference to the drawings.

FIG. 1 schematically shows an example of the components of the panel portion of the LED display device according to the present invention. Further, FIG. 2 shows in detail a cross section of a panel portion constituted by the respective elements of FIG. In these figures, the same parts as those in FIGS. 7 and 8 are designated by the same reference numerals.

As shown in FIG. 1, also in this LED display device, the LED lamps 21R, 21R of red, green, and blue emission colors are provided.
G, 21B as one set and a plurality of sets of LED lamps 21R,
21G and 21B are arranged in a matrix on the substrate 31, and one set of LED lamps 21R, 21G and 21B forms one pixel.

Also in this LED display device, the substrate 31 is attached to the tray-shaped casing 32 so as to be fitted therein. However, as shown in FIG. 2, even after the substrate 31 is attached to the housing 32, potting for sealing the electrode terminals (the electrode terminals 12 and 13 in FIG. 6) of the LED lamp 21 is not performed.

The front surface of the substrate 31 is covered with the mask louver 1. The mask louver 1 is a plate-shaped member made of an elastomer (a polymer substance having remarkable elasticity). An example of an elastomer suitable for forming the mask louver 1 is polyether block amide (PEB).
A), Polyolefin (TEO), Ether ester block copolymer (TEEE), Polyurethane (TPU)
R) or styrene block copolymer (TES).

The mask louver 1 has each L on the substrate 31.
It has a through hole 1 a corresponding to the position of the ED lamp 21. FIG. 3 shows a sectional shape of the through hole 1a. The through holes 1a are from the back surface (the surface facing the substrate 31 and the right surface in the figure) of the mask louver 1 to the front surface (the surface not facing the substrate 31 and the left surface in the figure). It has a tapered shape in which the diameter gradually decreases toward. The diameter of the through hole 1a near the front surface of the mask louver 1 is somewhat smaller than the standard diameter of the LED lamp 21.

On the front surface of the mask louver 1, the upper portions of the respective pixel rows in the lateral direction project forward in the shape of an eaves. The eaves-shaped portion has a function of preventing a human finger or the like from touching the LED lamp 21, and a function of suppressing the incidence of external light on the LED lamp 21.

As shown in FIG. 2, the through hole 1a has
The louver 1 of the LED lamp 21 (resin 14 in FIG. 6) has a smaller diameter than the diameter of the LED lamp 21 and spreads by using the elasticity of the mask louver 1. It is inserted closely.

Thus, in this LED display device, L
Since the LED lamp 21 is closely inserted into the through hole 1a of the mask louver 1 covering the front surface of the substrate 31 on which the ED lamp 21 is arranged, the through hole 1a has a gap leading from the front surface to the back surface of the mask louver 1. Disappear.

Therefore, rainwater and dust do not enter from the outside through the through hole 1a, and even if a human finger approaches or touches the mask louver 1, the through hole 1
No static electricity is generated at the electrode terminals of the LED lamp 21 via a. This prevents the electrode terminals of the LED lamp 21 from being corroded by rainwater or dust and the LED lamp 21 from being damaged by static electricity.

Since the electrode terminals of the LED lamp 21 are not sealed by potting, the material cost and the processing cost are lower than in the conventional case, and the cost of the LED display device can be reduced.

Further, since the electrode terminals of the LED lamp 21 are not sealed by potting, the LED lamp 21 can be easily removed from the substrate 31 even when the LED lamp 21 needs to be repaired or replaced after manufacturing the LED display device. It can be removed.

Next, FIG. 4 schematically shows another example of the components of the panel portion of the LED display device according to the present invention. Further, FIG. 5 shows in detail a cross section of a panel portion constituted by the respective elements of FIG. In these figures, FIG.
The parts common to those in FIG. 3 are designated by the same reference numerals, and duplicate description will be omitted.

In this LED display device, the front surface of the substrate 31 is covered with a mask 2 instead of the mask louver 1 shown in FIGS. The mask 2 is different from the mask louver 1 in that the front surface is flat (not protruding like an eaves), but is a plate-shaped member made of an elastomer, and each LED lamp on the substrate 31. The mask louver 1 is exactly the same as the mask louver 1 in that it has a through hole 2a having the same cross-sectional shape and diameter as the through hole 1a corresponding to the position of 21.

The front surface of the mask 2 is covered with a louver 3. The louver 3 is a plate-shaped member made of polycarbonate and has a through hole 3a corresponding to the position of each LED lamp 21 on the substrate 31 and slightly larger than the standard diameter of the LED lamp 21. There is. On the front surface of the louver 3, the upper portion of each pixel row in the horizontal direction projects forward in an eaves-like shape. This eave-shaped portion has a function of preventing a human finger or the like from touching the LED lamp 21, and the LED lamp 21.
Plays a function of suppressing the incidence of external light on the outside.

As shown in FIG. 5, the shell-shaped resin portion of the LED lamp 21 is inserted into the through hole 2a of the mask 2 so as to be in close contact therewith, and then passed through the through hole 3a of the louver 3.

Also in this LED display device, since the LED lamp 21 is closely inserted into the through hole 2a of the mask 2, there is no gap in the through hole 2a from the front surface to the back surface of the mask 2. Therefore, rainwater or dust does not enter from the outside through the through hole 2a, and even if a human finger approaches or touches the louver 3, the electrode terminal of the LED lamp 21 can pass through the through hole 2a. Does not generate static electricity.

As a result, LE is also affected by rainwater and dust.
Corrosion of the electrode terminals of the D lamp 21 and destruction of the LED lamp 21 due to static electricity are prevented.

Since the electrode terminals of the LED lamp 21 are not sealed by potting, the cost of the LED display device can be reduced because the material cost and the processing cost are lower than those in the conventional case.

Further, since the electrode terminals of the LED lamp 21 are not sealed by potting, the LED lamp 21 can be easily mounted on the substrate 31 even when the LED lamp 21 needs to be repaired or replaced after manufacturing the LED display device. It can be removed from.

Further, the function of preventing a human finger or the like from touching the LED lamp 21 and the function of suppressing the incidence of external light on the LED lamp 21 are made of polycarbonate, which is a substance excellent in weather resistance. The louver 3 can be made to fulfill.

In the above example, the through hole 1a of the mask louver 1 and the through hole 2a of the mask 2 are tapered in cross section. However, the cross-sectional shape of these through-holes may be a shape other than the tapered shape, provided that the through-holes are provided with a portion having a smaller diameter than the diameter of the LED lamp 21a.

The configuration of the panel portion as in the above example is not only applied to the LED display device in which one screen is formed by a single panel, but one screen is formed by arranging a plurality of panels. It may be applied to individual panels in the LED display device.

Further, the present invention is not limited to the above examples, and it is needless to say that various other configurations can be adopted without departing from the gist of the present invention.

[0046]

As described above, according to the LED display device of the present invention, the LED lamp is closely inserted into the through hole of the plate-shaped high elastic member which covers the front surface of the substrate on which the LED is arranged. Since there is no gap in this through hole, corrosion of the electrode terminal of the LED lamp due to rainwater or dust and destruction of the LED lamp due to static electricity can be prevented without sealing the electrode terminal of the LED lamp by potting. It

As a result, it is possible to obtain the effect that the cost of the LED display device can be reduced and the material cost and the processing cost are less than those in the conventional case.

Further, when the LED lamp needs to be repaired or replaced after the LED display device is manufactured, the LED lamp can be easily removed from the substrate.

Further, with this highly elastic member, a human finger or the like is L-shaped.
It is also possible to obtain an effect that it is possible to prevent the ED lamp from touching and to suppress the incidence of external light on the LED lamp.

Alternatively, the function of preventing a human finger or the like from touching the LED lamp and the function of suppressing the incidence of external light on the LED lamp are more excellent in weather resistance than the highly elastic member. It is also possible to obtain the effect that the member can be made to fulfill.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of components of a panel portion of an LED display device according to the present invention.

FIG. 2 is a view showing a cross section of a panel portion (consisting of each element of FIG. 1) of the LED display device according to the present invention.

3 is a diagram showing a cross-sectional shape of a through hole of the mask louver of FIG.

FIG. 4 is a perspective view showing another example of the components of the panel portion of the LED display device according to the present invention.

FIG. 5 is a view showing a cross section of a panel portion (which is configured by each element of FIG. 4) of the LED display device according to the present invention.

FIG. 6 is a diagram showing a general structure of an LED lamp.

FIG. 7 is a diagram showing components of a panel portion of a conventional LED display device.

FIG. 8 is a view showing a cross section of a panel portion of a conventional LED display device.

[Explanation of symbols]

1 mask louver, 1a, 2a, 3a through hole,
2 masks, 3 louvers, 12 and 13 LED lamp electrode terminals, 21R, 21G, 21B LED lamps, 31 substrates, and 32 casings

Continued front page    F term (reference) 5C094 AA41 AA43 BA25 CA19 CA24                       GB01 HA01                 5F041 AA31 DB01 DC07 DC23 DC44                       EE25 FF06                 5G435 AA17 AA19 BB04 CC09 CC12                       EE12 KK02 KK05 KK09 LL19

Claims (3)

[Claims] 1. An LED display device using an LED lamp, wherein a plate-shaped high-elasticity member having a through hole having a diameter smaller than the diameter of the LED lamp is inserted into the through hole, An LED display device, characterized in that it covers a front surface of a substrate on which the LED lamp is arranged. 2. The LED display device according to claim 1, wherein the front surface of the high-elasticity member has an upper portion of each pixel row in the lateral direction protruding forward in an eaves-like shape.
Display device. 3. The LED display device according to claim 1, wherein the front surface of the high-elasticity member has a planar shape, has a through hole, and an upper portion of each pixel row in the lateral direction protrudes forward in an eaves-like shape. An LED display device, wherein a plate-shaped second member covers the front surface of the high-elasticity member in a state where the LED lamp is passed through the through hole.