TWM480747U - LED dot matrix display - Google Patents

Description

LED dot matrix display

This creation belongs to the field of electronic displays, and in particular to an LED dot matrix display using LED point light sources as an image or animation display.

Press, generally used indoors or semi-outdoors as a display kanban for transmitting messages, images and advertisements, and LED dot matrix display which is spliced into a plane by a plurality of dot matrix LEDs, which has high brightness, high contrast and wide viewing angle. Features, and the size of the LED dot matrix display can also be increased or decreased according to user needs, and can produce display modes such as: monochrome, two-color and RGB full color to display a more diversified display effect.

Please refer to FIG. 1 , which is a schematic structural diagram of a general LED dot matrix display. As shown in the figure, the LED dot matrix display 1 is composed of a plurality of dot matrix LEDs 11 side by side spliced on a circuit board 12, and each dot matrix LED 1 comprises: a casing 111, an inner circuit board 112 and a plurality of The LED light-emitting chip 113 has a rectangular box structure. The top surface of the housing 111 is a light-emitting surface 1111, and a plurality of through-holes 1112 are arranged equidistantly in a dot matrix manner. The two through holes 1112 have a set spacing corresponding to the display resolution, and the smaller the set pitch is, the higher the display resolution is; and the rows of the inner circuit board 112 are provided with rows of pins 1121 for externally controlling the power supply; When assembled, the LED light-emitting chips 113 are disposed on the inner circuit board 112, and finally the inner circuit board 112 is placed in the housing 111, so that the LED light-emitting chips 113 are respectively disposed correspondingly. The position of the hole 1112 is fixed by injection molding. its The housing 111 is made by a general plastic injection molding technique, and the finished product is provided with a draft angle between the light-emitting surface 1111 and each side surface in order to smoothly remove the film, so that the area of the light-emitting surface 1111 is slightly The area of the bottom opening of the casing 111 is smaller than that of the casing 111 to be removed from the mold.

Referring to FIG. 2 again, it is a schematic diagram of a state in which a general LED dot matrix display is assembled. As shown in the figure, when splicing, the dot matrix LEDs 11 are aligned in the edge of the casing 111. Since the opening area of the bottom surface of the casing 111 is large, the two adjacent two casings are caused by splicing. A fine gap (GAP) is generated between the top surfaces of the light-emitting surfaces, and the temperature during the welding expands the volume of the casing 111 and the fixing glue, thereby causing the gap to expand and affecting the flatness and the spacing distance during the splicing, in particular It is a beating phenomenon (or called a mosaic effect) when an image moves. Moreover, since the volume of the casing 111 or the fixing glue is not uniformly expanded during welding, the designer and the assembler cannot accurately calculate the separation distance between the two casings 111 when designing or assembling, which often causes The display plane creates problems such as step differences or unevenness, which have long plagued manufacturers who manufacture the LED dot matrix display 1.

Therefore, the present inventors have intensively studied and designed the above-mentioned missing of the casing 111, and after a plurality of experiments, finally designed an improved casing structure to have a flat display surface after assembly. LED dot matrix display.

In view of this, one of the purposes of this creation is to provide an LED dot matrix display whose housing structure adopts a reverse draft angle design, so that the top surface area>the bottom surface area, according to the assembly, utilizes the top. The edge of the face is aligned, and the bottom surface is provided with a suitable gap for absorbing the volume change when the casing or the fixing glue is expanded, and a flat joint is formed by the gapless joint method. The display surface greatly improves the production yield and display effect. Moreover, for designers or assemblers, it is possible to perform dimensional design and assembly more accurately, reducing design and processing difficulties.

To achieve the above objective, the LED dot matrix display of the present invention comprises: a first circuit board having a line area on a top surface thereof, and the line area is arranged with a plurality of jacks according to a dot matrix arrangement; and a plurality of points a matrix LED, the dot matrix LEDs are soldered side by side on the first circuit board to form a flat display surface, and each dot matrix LED comprises: a casing, which has a rectangular box structure, and the top surface is an area One of the light-emitting surfaces of A1, the bottom surface is an opening of the area A2, and each of the side surfaces and the normal direction of the light-emitting surface has a draft angle set to one of the inward retractions, so that the light-emitting surface area A1> the opening area A2, And the light-emitting surface is arranged in a dot matrix manner with a plurality of through holes; a second circuit board is disposed in the housing, and the second circuit board is provided with a plurality of soldering holes corresponding to the through holes. The pad is provided with a plurality of pins on the bottom surface of the second circuit board; a plurality of light-emitting chips are respectively soldered and fixed on the pads, and the second circuit board is placed in the casing to make the light-emitting chips correspond to Position of the through hole; and a fixing glue, fill Disposed in the opening of the housing, by means of such pin insertion hole is fixed within those of the first circuit board. Wherein, the setting draft angle is between 1 degree and 5 degrees.

In one embodiment, each of the four corners of each of the housings is provided with a leg for raising the height of each of the housings on the first circuit board, so that the fixing glue does not touch the first A board causes tilting during assembly.

In an embodiment, each of the housings may take on a different shape, for example, each of the housings is square and the sides are the same length. Or, for example, each of the shells has a rectangular shape, and the long side of the light emitting surface is L1, and the short side is W1, then A1=L1*W1, the long side of the opening is L2, and the short side is W2, then A2=L2 *W2.

In one embodiment, each of the side surfaces is perpendicular to the light exiting surface, and each side surface is extended toward the opening by a distance, and then tilted according to the set draft angle, so the creation is reversed during production. The mold can be removed by means of demolding, so that it can be produced in a non-general manner.

1‧‧‧LED dot matrix display

11‧‧‧ dot matrix LED

111‧‧‧Shell

1111‧‧‧Glossy

1112‧‧‧through hole

112‧‧‧ inner board

1121‧‧‧ feet

113‧‧‧LED light-emitting chip

12‧‧‧ boards

2‧‧‧LED dot matrix display

21‧‧‧First board

211‧‧‧Line area

212‧‧‧ jack

22‧‧‧ dot matrix LED

221‧‧‧Shell

2211‧‧‧Glossy surface

2212‧‧‧ openings

2213‧‧‧ side

2214‧‧‧through hole

2215‧‧‧ feet

222‧‧‧second circuit board

2221‧‧‧ solder pads

2222‧‧‧pins

223‧‧‧Lighting chip

224‧‧‧Fixed adhesive

θ‧‧‧Set draft angle

L1, L2‧‧‧ long side

W1, W2‧‧‧ short side

Figure 1 is a schematic diagram showing the structure of a general LED dot matrix display.

Fig. 2 is a schematic view showing a state in which an LED dot matrix display is assembled using a general LED dot matrix.

Figure 3 is a schematic view showing the structure of the preferred embodiment of the present invention.

Figure 4 is a cross-sectional view showing the combination of the dot matrix LEDs of the preferred embodiment of the present invention.

Figure 5 is a schematic view showing a state in which the LED dot matrix display is assembled in accordance with a preferred embodiment of the present invention.

Figure 6 is another embodiment of the dot matrix LED of the preferred embodiment of the present invention.

In order for your review board to have a clear understanding of the content of this creation, please refer to the following description only.

Please refer to FIG. 3, FIG. 4 and FIG. 5 for a schematic structural view of a preferred embodiment of the present invention, and a combined cross-sectional view of a dot matrix LED and a schematic diagram of a state assembled into an LED dot matrix display. As shown in the figure, the LED dot matrix display 2 of the present invention mainly comprises a first circuit board 21 and a plurality of dot matrix LEDs 22.

The top surface of the first circuit board 21 is provided with a line area 211, and the line The area 211 is provided with a plurality of jacks 212 arranged in a dot matrix manner.

a plurality of dot matrix LEDs 22, wherein each of the matrix LEDs 22 is soldered side by side to the first circuit board 21 to form a flat display surface, and the dot matrix LED 22 further includes a housing 221 and a second circuit. The board 222, the plurality of light emitting chips 223 and the fixing glue 224.

The housing 221 has a rectangular box structure, and the housing 221 can be square or rectangular as shown in FIG. 3, the top surface of which is a light-emitting surface 2211 of the area A1, and the bottom surface is an opening 2212 of the area A2. And the long side of the light-emitting surface is L1, the short side is W1, then A1=L1*W1, the long side of the opening 2212 is L2, the short side is W2, then A2=L2*W2, and the surrounding loop is provided with 4 Side 2213. And a draft angle θ is set between one of the side surfaces and the normal direction of the light-emitting surface 2211, and the set draft angle θ is between 1 and 5 degrees, so that the light can be made The area A1 of the face 2211> the area A2 of the opening 2212. Further, a plurality of through holes 2214 are arranged on the light-emitting surface 2211 in a dot matrix manner. In addition, the four corners of the housing 221 are respectively provided with a leg 2215 for raising the height of the housing 221 at the first circuit board 21.

The second circuit board 222 is disposed in the housing 221, and the second circuit board 222 is provided with a plurality of pads 2221 corresponding to the through holes 2213, and a plurality of pads 2221 are disposed on the bottom surface of the second circuit board 222. Pin 2222.

A plurality of light-emitting chips 223 are soldered and fixed to the pads 2221, and the second circuit board 222 is placed in the housing 221 so that the light-emitting wafers 223 correspond to the positions of the through holes 2214.

The fixing glue 224 is filled in the opening 2212 of the housing 221 , and is fixed in the insertion holes 212 of the first circuit board 21 by the pins 2222 .

In addition, please refer to FIG. 6 as another embodiment of the dot matrix LED of the preferred embodiment of the present invention. As shown in the figure, each side surface 2213 is perpendicular to the light-emitting surface 2211, and the side surface 2213 is extended downward in the direction 2212 of the opening, and then the draft angle θ is determined according to the setting. The inside is tilted. It should be noted that the wall thickness of the housing 221 is equal to one-half of the distance between the two illuminating wafers 223, and the spacing between the adjacent two illuminating wafers 223 can be ensured after the two housings 221 are spliced.

However, the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, it is common knowledge in the technical field or equivalent or easy to be familiar with the technology. The changes and modifications made by the changer without departing from the spirit and scope of this creation shall be covered by the scope of this creation.

2‧‧‧LED dot matrix display

21‧‧‧First board

211‧‧‧Line area

212‧‧‧ jack

22‧‧‧ dot matrix LED

221‧‧‧Shell

2211‧‧‧Glossy surface

2212‧‧‧ openings

2213‧‧‧ side

2215‧‧‧ feet

2222‧‧‧pins

L1, L2‧‧‧ long side

W1, W2‧‧‧ short side

Claims (6)

An LED dot matrix display, comprising: a first circuit board having a line area on a top surface thereof, wherein the line area is arranged with a plurality of jacks according to a dot matrix arrangement; and a plurality of dot matrix LEDs, the matrix of each point The LEDs are soldered side by side on the first circuit board to form a flat display surface. The matrix LEDs of each point comprise: a housing having a rectangular box structure, and the top surface of the housing is one of the areas A1. a light-emitting surface, the bottom surface of the casing is an opening of the area A2, and a draft angle is set between one of the side faces and the normal direction of the light-emitting surface, such that the light-emitting surface area A1> the opening area A2, the light-emitting surface is equidistantly arranged with a plurality of through holes; a second circuit board is disposed in the casing, and the second circuit board is provided with a plurality of pads corresponding to the through holes, a plurality of pins are disposed on the bottom surface of the second circuit board; a plurality of light-emitting chips are respectively soldered and fixed on the pads, and the second circuit board is placed in the casing to make the light-emitting wafers correspond to the through holes. Position; and a fixing glue, the filling is disposed in the opening to The second circuit board is fixed in the housing, by means of such pin insertion hole is fixed within those of the first circuit board. The LED dot matrix display of claim 1, wherein the set draft angle is between 1 and 5 degrees. The LED dot matrix display of claim 2, wherein each of the four corners of each of the housings is provided with a leg for raising the height of each of the housings to the first circuit board. The LED dot matrix display of claim 3, wherein each of the housings is square. The LED dot matrix display according to claim 3, wherein each of the shells has a rectangular shape, and the long side of the light emitting surface is L1, and the short side is W1, then A1=L1*W1, the opening The long side is L2 and the short side is W2, then A2=L2*W2. The LED dot matrix display of claim 4, wherein each of the side surfaces is perpendicular to the light exiting surface, and the each side surface extends a distance toward the opening, and the draft angle is determined according to the setting. The inside is tilted.