LED lamp bead and display screen

Abstract

The LED lamp bead comprises a lamp body and pins arranged in pairs, the pins arranged in pairs are oppositely arranged and surround the backlight face of the lamp body, the lamp body is installed on an external structure through the pins arranged in pairs, the surfaces, away from the lamp body, of the pins form welding faces, and the welding faces are welded to the lamp body. A groove is formed in the welding surface, and the welding surface is used for being installed on the external structure. It can be understood that the LED lamp bead provided by the utility model realizes the horizontal installation of the lamp body on the circuit board, avoids the problem that a display screen generates a yin-yang surface, and also improves the installation stability of the lamp body on the circuit board.

Description

Technical Field

[0001] The utility model relates to the technical field of display equipment, in particular to an LED lamp bead and a display screen. Background Art

[0002] The surface mounting technology (SMT) of display screens is a circuit assembly technology in which the body of an LED lamp bead is soldered to the pad of a circuit board through pins. Specifically, after the solder paste is melted, the pins are soldered to the pads through liquid solder paste to complete the installation of the LED lamp bead on the circuit board. However, due to the uneven diffusion of the liquid solder paste, the lamp body installed on the circuit board is tilted, resulting in the problem of the positive and negative sides of the assembled display screen. Utility Model Content

[0003] The main purpose of the utility model is to provide an LED lamp bead to achieve horizontal installation of the lamp body on a circuit board and avoid the problem of yin and yang sides of a display screen.

[0004] To achieve the above-mentioned purpose, the LED lamp bead proposed in the utility model includes: a lamp body and pins arranged in pairs, the pins arranged in pairs are arranged opposite to each other and surround the backlight surface of the lamp body, the lamp body is installed on the external structure through the pins arranged in pairs, the surface of the pins facing away from the lamp body forms a welding surface, the welding surface is provided with a groove, and the welding surface is used to be installed on the external structure.

[0005] Optionally, the pin includes a supporting portion and a welding portion, the supporting portion protrudes from the surface of the welding portion, the surface of the supporting portion facing away from the welding portion is connected to the backlight surface of the lamp body, the welding portions of the pins arranged in pairs are arranged relatively to each other so as to surround the backlight surface of the lamp body, and the surface of the welding portion facing away from the lamp body forms the welding surface.

[0006] Optionally, the groove extends in opposite directions of the pins arranged in pairs and passes through the welding portion.

[0007] Optionally, the groove extends along a direction opposite to the welding portion and the lamp body and passes through the welding portion.

[0008] Optionally, the welding portion is arranged obliquely relative to the lamp body installation surface, and the welding portion has two ends arranged back to back, one end of the welding portion is connected to the supporting portion, and the other end of the welding portion is arranged in a direction close to the lamp body.

[0009] Optionally, the welding portion is inclined at an angle of not less than 5° relative to the lamp body mounting surface.

[0010] Optionally, the length of the welding portion along the width direction of the groove is defined as W, and the notch width of the groove is not greater than W / 3.

[0011] Optionally, the LED lamp bead includes a plurality of groups of pins arranged in pairs, and the plurality of groups of pins arranged in pairs are arranged at intervals on the backlight surface of the lamp body.

[0012] Optionally, the groove is selected from one of a trapezoidal groove, a rectangular groove, an arc groove, a triangular groove and a polygonal groove.

[0013] The utility model also provides a display screen, comprising the LED lamp beads.

[0014] In the technical solution of the utility model, the soldering pad of the circuit board is used as an external structure, and the design of the groove reduces the contact area between the soldering surface and the surface of the soldering pad, and under the same weight of the lamp, increases the pressure of the solder paste applied to the surface of the soldering pad through the soldering surface. During assembly, the soldering surface of the LED lamp bead is pressed against the solder paste on the surface of the soldering pad, and the fluidity of the liquid solder paste pressed on the soldering surface is increased by increasing the pressure applied to the solder paste, so that the compressed liquid solder paste is dispersed, thereby avoiding the problem of the lamp body being installed tilted due to uneven dispersion of the solder paste. While increasing the pressure applied to the solder paste, the setting of the groove not only provides a circulation channel for the flow of the solder paste, which is beneficial to improving the fluidity of the liquid solder paste and realizing the horizontal distribution of the liquid solder paste on the soldering surface, but also the solder paste immersed in the groove realizes the welding of the groove wall and the soldering pad, and enhances the welding strength of the pin on the surface of the soldering pad, thereby improving the stability of the lamp body installed on the soldering pad through the pin. It can be understood that the LED lamp beads proposed in the present invention realize the horizontal installation of the lamp body on the circuit board, avoid the problem of the yin and yang sides of the display screen, and improve the stability of the installation of the lamp body on the circuit board. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of LED lamp beads in the prior art;

[0017] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the LED lamp bead;

[0018] Figure 3 This is a schematic diagram of the structure of an LED lamp bead according to an embodiment of the utility model;

[0019] Figure 4 for Figure 3 Schematic diagram of the three-dimensional structure of the LED lamp bead;

[0020] Figure 5 A schematic diagram of the three-dimensional structure of an LED lamp bead according to an embodiment of the utility model;

[0021] Figure 6 A schematic diagram of the three-dimensional structure of an LED lamp bead according to an embodiment of the utility model;

[0022] Figure 7 A schematic diagram of the three-dimensional structure of an LED lamp bead according to an embodiment of the utility model;

[0023] Description of Figure Numbers:

[0024] name Label name Label LED lamp beads 100 Welding Department 133 Lamp body 110 Grooves 133a Pinout 130 Welding surface 134 Support 131

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] See also Figure 1 to Figure 2 As shown, the existing LED lamp bead 100 includes a lamp body 110 and pins 130 arranged in pairs, the pins 130 arranged in pairs are arranged opposite to each other and surround the backlight surface of the lamp body 110, and the lamp body 110 is installed on the pad of the circuit board through the pins 130 arranged in pairs, and the surface of the pins 130 away from the lamp body 110 forms a welding surface 134. During assembly, after the solder paste is melted, the liquid solder paste flows and diffuses on the pad of the circuit board, so that the liquid solder paste forms a distribution on the pad with a high middle and low sides. In this way, the welding surface 134 of the LED lamp bead 100 is pressed on the liquid solder paste surface with a high middle and low sides, which will undoubtedly cause the installed lamp body 110 to tilt, thereby affecting the light emission of the lamp body 110 and causing the problem of the yin and yang sides of the display screen.

[0029] See also Figures 3 to 7 As shown, in one embodiment of the utility model, an LED lamp bead 100 includes: a lamp body 110 and pins 130 arranged in pairs, the pins 130 arranged in pairs are arranged opposite to each other and surround the backlight surface of the lamp body 110, the lamp body 110 is installed on an external structure through the pins 130 arranged in pairs, and the surface of the pins 130 facing away from the lamp body 110 forms a welding surface 134, the welding surface 134 is provided with a groove 133a, and the welding surface 134 is used to be installed on the external structure.

[0030] In the technical solution of the utility model, the solder pad of the circuit board is used as an external structure, and the design of the groove 133a reduces the contact area between the soldering surface 134 and the soldering pad surface, and increases the pressure of the solder paste applied to the soldering pad surface through the soldering surface 134 under the same gravity of the lamp body 110. During assembly, the soldering surface 134 of the LED lamp bead 100 is pressed against the solder paste on the soldering pad surface, and the fluidity of the liquid solder paste pressed on the soldering surface 134 is increased by increasing the pressure applied to the solder paste, so that the pressed liquid solder paste is dispersed, thereby avoiding the problem of the lamp body 110 being tilted during installation due to uneven dispersion of the solder paste. While increasing the pressure applied to the solder paste, the setting of the groove 133a not only provides a circulation channel for the flow of the solder paste, which is conducive to improving the fluidity of the liquid solder paste and realizing the horizontal dispersion of the liquid solder paste on the welding surface 134, but also the solder paste immersed in the groove 133a realizes the welding of the groove wall of the groove 133a and the pad, and enhances the welding strength of the pin 130 on the surface of the pad, thereby improving the stability of the lamp body 110 installed on the pad through the pin 130. It can be understood that the LED lamp bead 100 proposed by the utility model realizes the horizontal installation of the lamp body 110 on the circuit board, avoids the problem of the yin and yang sides of the display screen, and also improves the stability of the lamp body 110 installed on the circuit board.

[0031] It should be noted that the pin 130 in the embodiment of the utility model can be an integral structure formed by bending, or a split structure. The two pins 130 arranged in pairs are arranged opposite to each other and surround the backlight surface of the lamp body 110. In the assembly process of the display screen, the LED lamp bead 100 is soldered to the soldering pad of the circuit board through the two pins 130 arranged in pairs. A groove 133a is provided on the surface of the pin 130 away from the lamp body 110. The groove 133a can be of various shapes. Through the setting of the groove 133a, part of the solder paste is accommodated in the inside of the groove 133a, and the remaining solder paste is dispersed on the welding surface 134 under the action of the groove 133a, thereby ensuring the horizontal dispersion of the solder paste on the welding surface 134, thereby avoiding the tilt of the lamp body 110 when installed on the circuit board, especially the problem of the positive and negative sides of the display screen caused by small-sized LED lamp bead patches.

[0032] See also Figures 3 to 7As shown, in an embodiment of the present invention, the pin 130 includes a support portion 131 and a welding portion 133, the support portion 131 is convexly arranged on the surface of the welding portion 133, the surface of the support portion 131 away from the welding portion 133 is connected to the backlight surface of the lamp body 110, the welding portions 133 of the pins 130 arranged in pairs are arranged relatively to surround the backlight surface of the lamp body 110, and the surface of the welding portion 133 away from the lamp body 110 forms a welding surface 134. It should be noted that in the embodiment of the present invention, the support portion 131 and the welding portion 133 can be an integrally formed structural member or a separate structural member, the support portion 131 can be a plate or a rod, the welding portion 133 is used to connect with an external structure, the welding portion 133 is formed with a welding surface 134, and the welding portion 133 can be a structure of various shapes, including a plate structure and a block structure, etc. The embodiment of the present invention is not limited thereto, and the above are all within the protection scope of the present invention. The utility model connects the lamp body 110 and the welding part 133 through the support part 131. In this way, after the welding part 133 is welded to the pad of the circuit board, the support part 131 is supported on the lamp body 110, thereby forming a stable support for the lamp body 110, thereby ensuring the stable installation of the LED lamp bead 100.

[0033] See also Figures 3 to 7 As shown, in one embodiment of the utility model, the groove 133a extends in the opposite direction of the pins 130 arranged in pairs and penetrates the welding part 133. It should be noted that the utility model further reduces the contact area between the welding surface 134 and the surface of the pad by extending the groove 133a in the opposite direction of the pins 130 arranged in pairs and penetrating the welding part 133, thereby increasing the pressure applied to the solder paste through the welding surface 134. While increasing the pressure applied to the solder paste, the flow channel provided by the groove 133a is increased, thereby further improving the fluidity of the pressurized liquid solder paste and increasing the solder discharge capacity of the pin 130. In this way, the solder paste on the horizontal surface of the middle protrusion is discharged and dispersed through the groove 133a that penetrates, so that the solder paste on the welding surface 134 is dispersed horizontally, thereby ensuring that the installation of the lamp body 110 on the circuit board will not be tilted. In addition, the enlarged groove 133a enhances the welding strength of the pin 130 on the surface of the pad through the welding of the groove wall of the groove 133a and the pad, and improves the stability of the lamp body 110 installed through the pin 130.

[0034] See also Figures 3 to 7As shown, in one embodiment of the present invention, the groove 133a extends in the direction opposite to the welding part 133 and the lamp body 110 and penetrates the welding part 133. It should be noted that the present invention extends the groove 133a in the direction opposite to the welding part 133 and the lamp body 110 and penetrates the welding part 133, thereby increasing the flow channel provided by the groove 133a, thereby increasing the tin discharge capacity of the pin 130, and the solder paste on the horizontal surface of the middle protrusion can be discharged and dispersed through the groove 133a that penetrates, so that the solder paste on the welding surface 134 is dispersed horizontally, thereby ensuring that the lamp body 110 will not be tilted when installed on the circuit board.

[0035] See also Figures 3 to 7 As shown, in one embodiment of the utility model, the welding part 133 is tilted relative to the mounting surface of the lamp body 110, and the welding part 133 has two ends that are arranged back to back, one end of the welding part 133 is connected to the support part 131, and the other end of the welding part 133 is arranged in a direction close to the lamp body 110. It should be noted that the diffusion and flow of liquid solder paste on the surface of the pad will cause the thickness of the solder paste deposited on the surface of the pad to be high in the middle and low on both sides. In the embodiment of the utility model, the end of the welding part 133 away from the support part 131 is arranged in a direction close to the lamp body 110, so that the welding part 133 squeezes the solder paste in the middle to discharge it to both sides, thereby enhancing the solder discharge capacity of the pin 130, which is conducive to achieving the horizontal installation of the lamp body 110 on the circuit board, and avoiding the problem of the positive and negative sides of the display screen caused by the tilt of the lamp body 110.

[0036] See also Figures 3 to 7 As shown, in one embodiment of the present invention, the angle of inclination of the soldering portion 133 relative to the mounting surface of the lamp body 110 is not less than 5°. It should be noted that the embodiment of the present invention adjusts the inclination angle of the soldering portion 133 according to the thickness of the solder paste formed by the diffusion of the liquid solder paste on the surface of the pad, which is conducive to realizing the horizontal installation of the lamp body 110 on the circuit board, thereby avoiding the problem of the positive and negative sides of the display screen caused by the inclined installation of the lamp body 110.

[0037] See also Figure 4 As shown, in one embodiment of the present invention, the length of the welding portion 133 along the width direction of the groove 133a is defined as W, the notch width of the groove 133a is defined as D, and D is not greater than W / 3. It should be noted that the present invention adjusts the ratio of the notch width of the groove 133a to the length of the welding portion 133 along the width direction of the groove 133a, thereby achieving horizontal installation of the lamp body 110 on the pad of the circuit board and ensuring the stability of the installation of the lamp body 110 on the circuit board.

[0038] See also Figures 3 to 7As shown, in one embodiment of the present invention, the LED lamp bead 100 includes a plurality of groups of pins 130 arranged in pairs, and the plurality of groups of pins 130 arranged in pairs are arranged at intervals on the backlight surface of the lamp body 110. It should be noted that the embodiment of the present invention can adjust the number of pins 130 arranged in pairs as needed, and can be two groups of pins 130 arranged in pairs, or can be three groups of pins 130 arranged in pairs. The embodiment of the present invention is not limited to this, and all of the above are within the protection scope of the present invention. The embodiment of the present invention uses a plurality of pins 130 arranged in pairs to ensure that the lamp body 110 is installed horizontally on the circuit board, while also achieving stable welding of the lamp body 110 on the circuit board.

[0039] See also Figures 4 to 7 As shown, in one embodiment of the present invention, the groove 133a is selected from a trapezoidal groove, a rectangular groove, an arc groove, a triangular groove and a polygonal groove. It should be noted that the polygonal groove includes a pentagonal groove, a hexagonal groove, etc. Specifically, Figure 4 The groove 133a shown is a trapezoidal groove. Figure 5 The rectangular groove of the groove 133a shown, Figure 6 The groove 133a shown is an arc-shaped groove. Figure 7 The groove 133a shown is a triangular groove, and the embodiment of the utility model is not limited thereto, and the above are all within the protection scope of the utility model. The design of the groove 133a in the embodiment of the utility model, on the one hand, reduces the contact area between the welding surface 134 and the surface of the pad, increases the pressure applied to the solder paste through the welding surface 134, and achieves the effect of improving the fluidity of the liquid solder paste under pressure on the welding surface 134; on the other hand, it provides a circulation channel for the flow of the solder paste, further increases the fluidity of the liquid solder paste, and makes the liquid solder paste disperse horizontally on the welding surface 134. Under the influence of these two parts, the liquid solder paste disperses the welding surface 134 horizontally, thereby realizing the horizontal installation of the lamp body 110 on the circuit board, avoiding the problem of the positive and negative sides of the display screen. At the same time, the solder paste immersed in the groove 133a realizes the welding of the groove wall of the groove 133a and the pad, enhances the welding strength of the pin 130 on the surface of the pad, thereby improving the stability of the lamp body 110 installed on the pad through the pin 130.

[0040] See also Figures 3 to 7As shown, in one embodiment of the utility model, a display screen includes an LED lamp bead 100, and the LED lamp bead 100 includes: a lamp body 110 and pins 130 arranged in pairs, the pins 130 arranged in pairs are arranged opposite to each other and surround the backlight surface of the lamp body 110, and the lamp body 110 is installed on an external structure through the pins 130 arranged in pairs, and the surface of the pins 130 away from the lamp body 110 forms a welding surface 134, and the welding surface 134 is provided with a groove 133a, and the welding surface 134 is used to be installed on the external structure. In the embodiment of the utility model, in the application of the display screen, the design of the groove 133a reduces the contact area between the welding surface 134 and the surface of the pad, and under the same gravity of the lamp body 110, the pressure applied to the solder paste through the welding surface 134 is increased. During assembly, the soldering surface 134 of the LED lamp bead 100 is pressed against the solder paste on the surface of the solder pad, and the fluidity of the liquid solder paste pressed on the soldering surface 134 is increased by increasing the pressure applied to the solder paste, so that the pressed liquid solder paste is dispersed, thereby avoiding the problem of the lamp body 110 being installed tilted due to uneven solder paste dispersion. While increasing the pressure applied to the solder paste, the setting of the groove 133a not only provides a circulation channel for the flow of the solder paste, further increases the fluidity of the liquid solder paste, and realizes the horizontal dispersion of the liquid solder paste on the soldering surface 134, but also the solder paste immersed in the groove 133a realizes the welding of the groove wall of the groove 133a and the solder pad, and enhances the welding strength of the pin 130 on the surface of the solder pad, thereby improving the stability of the lamp body 110 installed on the solder pad through the pin 130. It can be understood that the LED lamp bead 100 proposed by the utility model realizes the horizontal installation of the lamp body 110 on the circuit board, avoids the problem of the yin and yang sides of the display screen, and also improves the stability of the lamp body 110 installed on the circuit board.

[0041] The above description is only an optional embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An LED lamp bead, characterized in that: The invention comprises: a lamp body and pins arranged in pairs, wherein the pins arranged in pairs are arranged opposite to each other and surround the backlight surface of the lamp body, the lamp body is installed on an external structure through the pins arranged in pairs, and the surface of the pins facing away from the lamp body forms a welding surface, the welding surface is provided with a groove, and the welding surface is used to be installed on the external structure.

2. The LED lamp bead according to claim 1, characterized in that: The pin includes a supporting portion and a welding portion, the supporting portion protrudes from the surface of the welding portion, the surface of the supporting portion facing away from the welding portion is connected to the backlight surface of the lamp body, the welding portions of the pins arranged in pairs are arranged relatively to each other to surround the backlight surface of the lamp body, and the surface of the welding portion facing away from the lamp body forms the welding surface.

3. The LED lamp bead as claimed in claim 2, characterized in that: The grooves extend in opposite directions of the pins arranged in pairs and penetrate the welding portion.

4. The LED lamp bead as claimed in claim 2, characterized in that: The groove extends along a direction in which the welding portion is opposite to the lamp body and penetrates the welding portion.

5. The LED lamp bead as claimed in claim 2, characterized in that: The welding portion is arranged obliquely relative to the lamp body installation surface, and has two ends arranged back to back, one end of the welding portion is connected to the supporting portion, and the other end of the welding portion is arranged in a direction close to the lamp body.

6. The LED lamp bead as claimed in claim 5, characterized in that: The welding portion is inclined at an angle of not less than 5° relative to the lamp body mounting surface.

7. The LED lamp bead as claimed in claim 2, characterized in that: The length of the welding portion along the width direction of the groove is defined as W, and the notch width of the groove is not greater than W / 3.

8. The LED lamp bead according to any one of claims 1 to 7, characterized in that: The LED lamp bead comprises a plurality of groups of pins arranged in pairs, and the plurality of groups of pins arranged in pairs are arranged at intervals on the backlight surface of the lamp body.

9. The LED lamp bead according to any one of claims 1 to 7, characterized in that: The groove is selected from a trapezoidal groove, a rectangular groove, an arc groove, and a triangular groove.

10. A display screen, characterized in that: The LED lamp bead comprises any one of claims 1 to 9.

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