An RGB lamp bead adapted to a special-shaped LED display screen

Abstract

The present invention belongs to the technical field of LED lamps, and particularly relates to an RGB lamp bead adapted to a special-shaped LED display screen, which comprises an LED bracket, an LED chip and a transparent encapsulation body. The LED chip includes a red LED chip, a blue LED chip and a green LED chip. The LED bracket includes electrode pins and a diamond-shaped base. A lamp cup is provided in the middle of the upper surface of the diamond-shaped base. A plurality of pads are arranged on the lamp cup, and electrode pins corresponding to the pads one by one are fixed on the diamond-shaped base below the pads. By designing the shape of the base as diamond-shaped and moving the electrode pins inwards, the present invention can effectively prevent the phenomenon that the edge lamp beads are easily detached under the action of external force; the edge of the lamp bead is changed from straight to oblique, and when applied to the splicing display of a special-shaped LED screen, the trapezoid effect can be effectively reduced, facilitating the integrity of the display.

Description

Technical Field

[0001] The present invention belongs to the technical field of LED lights, and particularly relates to an RGB lamp bead suitable for special-shaped LED displays. Background Art

[0002] An LED display is composed of small LED module panels; an LED, Light Emitting Diode (abbreviation), is a display method that controls semiconductor light-emitting diodes. A P-type semiconductor and an N-type semiconductor are combined to form a PN junction. When current passes through, electrons flow from the N-type semiconductor to the P-type semiconductor, and holes flow from the P-type semiconductor to the N-type semiconductor. Electrons and holes meet and recombine near the PN junction, and this recombination process releases energy, which is released in the form of photons, that is, the LED emits light; an LED display is generally used to display various information such as text, images, videos, and video signals.

[0003] With the continuous progress of display technology and the increasing demand of consumers for personalization, special-shaped LED displays have shown great market potential in various application scenarios due to their unique shapes and flexible customization capabilities. Such displays not only break the limitations of traditional rectangular screens but also bring users an unprecedented visual experience through various irregular shapes such as spherical, arc-shaped, and L-shaped. However, the production and manufacturing of special-shaped screens face many technical challenges.

[0004] For example Figure 1 As shown, traditional RGB lamp beads, as the core components of the display screen, their rectangular shapes and fixed sizes are insufficient in the production of special-shaped screens. On the one hand, when rectangular lamp beads are spliced into a special-shaped structure, it is often difficult to ensure the uniform distribution of pixel points, resulting in visual problems such as trapezoidal effect or "trapezoidal distortion", affecting the display effect. On the other hand, the corner parts of rectangular lamp beads are prone to falling off after long-term use, reducing the reliability and service life of the display screen. Summary of the Invention

[0005] Aiming at the above deficiencies of the prior art, the present invention provides an RGB lamp bead suitable for special-shaped LED displays to solve the above technical problems.

[0006] An RGB lamp bead adapted to a special-shaped LED display screen, comprising an LED bracket, an LED chip and a transparent encapsulation body. The LED chip includes a red LED chip, a blue LED chip and a green LED chip. The LED bracket includes electrode pins and a diamond-shaped base. A lamp cup is provided in the middle of the upper surface of the diamond-shaped base. A plurality of pads are provided on the lamp cup. Electrode pins corresponding to the pads one by one are fixed on the diamond-shaped base below the pads. The electrode pins include a positive electrode pin and a negative electrode pin. The electrode pins penetrate through the diamond-shaped base and the lamp cup and are connected to the bottom of the pads. The LED chip is installed at one end of the pad away from the electrode pin. A bonding wire is provided between the LED chip and the pad with the opposite polarity to the installed pad. The transparent encapsulation body is filled in the lamp cup.

[0007] A further improvement of this technical solution is that the red LED chip is fixed to the top of the corresponding pad by silver glue, and the blue LED chip and the green LED chip are both fixed to the top of the same pad by transparent glue.

[0008] A further improvement of this technical solution is that the pad includes a lamp core pad and an L-shaped pad provided below the lamp core pad. The lamp core pad is provided above the lamp cup. The LED chip is installed above the lamp core pad. The top end of the L-shaped pad is connected to the bottom end of the lamp core pad. The electrode pin is connected to the bottom end of the L-shaped pad.

[0009] A further improvement of this technical solution is that the L-shaped pad adopts a QFN type pad.

[0010] A further improvement of this technical solution is that the electrode pins are fixedly installed on the long hypotenuse side of the diamond-shaped base.

[0011] A further improvement of this technical solution is that the blue LED chip and the green LED chip are both fixed to the top of the corresponding pad by transparent glue, and are arranged in an equilateral triangle with the red LED chip. The electrode pins are fixedly installed at the middle and surrounding positions of the bottom of the diamond-shaped base to improve the earthquake resistance of the lamp bead.

[0012] A further improvement of this technical solution is that when the blue LED chip and the green LED chip are installed on the same pad, two bonding wires are provided between the blue LED chip and the pad. One bonding wire is provided between the blue LED chip and the pad with the opposite polarity to the installed pad, and the other bonding wire is provided between the blue LED chip and the pad with the same polarity as the installed pad. Two bonding wires are provided between the green LED chip and the pad. One bonding wire is provided between the green LED chip and the pad with the opposite polarity to the installed pad, and the other bonding wire is provided between the green LED chip and the pad with the same polarity as the installed pad.

[0013] A further improvement of this technical solution is that the base is fixedly provided on the electrode pins by injection molding.

[0014] A further improvement of this technical solution is that the electrode pins include 3 positive electrode pins and 1 negative electrode pin, and the red LED chip, blue LED chip, and green LED chip are respectively installed on the pads corresponding to the positive electrode pins.

[0015] A further improvement of this technical solution is that the electrode pins include 1 positive electrode pin and 3 negative electrode pins, and the red LED chip, blue LED chip, and green LED chip are respectively installed on the pads corresponding to the negative electrode pins.

[0016] The beneficial effects of the present invention are as follows. By designing the shape of the base as diamond-shaped and moving the electrode pins inward, it can effectively prevent the phenomenon that the edge lamp beads are easily detached under the action of external forces; by designing the shape of the base as diamond-shaped, the marginalization of the lamp beads changes from straight to oblique, and when applied to the splicing of LED screens with special-shaped shapes for display, it can effectively reduce the trapezoidal effect and facilitate the integrity of the display; by designing the shape of the base as diamond-shaped, the light output ratio can be effectively increased, the refraction of the light of the LED chip passing through the transparent encapsulation body on the surface of the base is reduced, and the utilization rate of light is improved.

[0017] In addition, the design principle of the present invention is reliable, the structure is simple, and it has a very broad application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a structural diagram of a traditional RGB lamp bead strip.

[0020] Figure 2 It is an arrangement diagram of the LED chips inside the common-anode conventional lamp beads of the present invention.

[0021] Figure 3 It is an equilateral triangle arrangement diagram of the LED chips inside the common-anode lamp beads of the present invention.

[0022] Figure 4 It is an arrangement diagram of the LED chips inside the common-cathode conventional lamp beads of the present invention.

[0023] Figure 5 It is a structural diagram of the lamp bead strip of the present invention.

[0024] 110 is the electrode pin, 120 is the diamond-shaped base, 121 is the lamp cup, 122 is the pad, 131 is the red LED chip, 132 is the blue LED chip, and 133 is the green LED chip. Detailed implementation mode

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention in this specification are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

[0027] The following explains the key terms that appear in the present invention.

[0028] An RGB light-emitting diode (LED) is a type of multi-color LED composed of LED beads of three colors: red (Red), green (Green), and blue (Blue). It uses the combination of these three-color LED chips. By precisely controlling the brightness of each color, a wide range of color spectra can be mixed to achieve various color combinations and transformation effects. The working principle of the RGB LED is based on the principle of LED light emission. When an electric current passes through the LED chip, electrons and holes meet and recombine near the PN junction, releasing energy, and this energy is emitted in the form of photons, thus generating the light-emitting phenomenon. By controlling the magnitude and frequency of the electric current passing through the RGB three-color LED chips, the brightness of each color can be adjusted, and thus the color mixing and transformation can be achieved.

[0029] QFN (Quad Flat No-lead Package) type pads are pads with a special design, which are mainly used in surface mount technology. The QFN package is a new surface mount chip packaging technology with small pad size, small volume, and plastic as the sealing material. Since there is a large exposed pad in the center of the bottom that is soldered to the heat sink pad of the PCB, this makes the QFN have excellent electrical and thermal performance.

[0030] Such as Figure 2 And Figure 3As shown in the figure, the present invention provides an RGB lamp bead adapted to a special-shaped LED display screen, which includes an LED bracket, an LED chip, and a transparent encapsulation body. The LED chip includes a red LED chip, a blue LED chip, and a green LED chip. The LED bracket includes electrode pins and a diamond-shaped base. A lamp cup is formed in the middle of the upper surface of the diamond-shaped base. A plurality of pads are arranged on the lamp cup. Electrode pins corresponding to the pads one by one are fixed on the diamond-shaped base below the pads. The electrode pins include a positive electrode pin and a negative electrode pin. The electrode pins penetrate through the diamond-shaped base and the lamp cup and are connected to the bottom of the pads. The LED chip is installed at one end of the pad away from the electrode pin. A bonding wire is arranged between the LED chip and the pad with a polarity opposite to that of the installed pad; the transparent encapsulation body is filled in the lamp cup, and the material of the transparent encapsulation body is high-temperature resistant and transparent silica gel or resin or plastic. Among them, the base is fixedly arranged on the electrode pins by an injection molding method.

[0031] Specifically, the pad includes a lamp core pad and an L-shaped pad arranged below the lamp core pad. The lamp core pad is arranged above the lamp cup, and the LED chip is installed above the lamp core pad. The top end of the L-shaped pad is connected to the bottom end of the lamp core pad, and the electrode pin is connected to the bottom end of the L-shaped pad. Among them, the L-shaped pad adopts a QFN type pad.

[0032] In addition, when the blue LED chip and the green LED chip are installed on the same pad, two bonding wires are arranged between the blue LED chip and the pad. One bonding wire is arranged between the blue LED chip and the pad with a polarity opposite to that of the installed pad, and the other bonding wire is arranged between the blue LED chip and the pad with the same polarity as the installed pad; two bonding wires are arranged between the green LED chip and the pad. One bonding wire is arranged between the green LED chip and the pad with a polarity opposite to that of the installed pad, and the other bonding wire is arranged between the green LED chip and the pad with the same polarity as the installed pad.

[0033] As Figure 2As shown in the figure, the present invention provides an RGB lamp bead adapted to a special-shaped LED display screen, which includes an LED bracket, an LED chip, and a transparent encapsulation body. The LED bracket includes electrode pins and a diamond-shaped base. The base is fixedly arranged on the electrode pins by injection molding. A lamp cup is opened in the middle of the upper surface of the diamond-shaped base. There are 4 pads on the lamp cup, namely pad A, pad B, pad C, and pad D. Electrode pins corresponding to the pads one by one are fixed on the diamond-shaped base below the pads. The electrode pins penetrate through the diamond-shaped base and the lamp cup and are connected to the bottom of the pads. The electrode pins are fixedly installed on the long hypotenuse side of the diamond-shaped base (to facilitate improving the stability of the lamp bead). The LED chip is installed at one end of the pad away from the electrode pin. Among them, the electrode pins include 3 negative electrode pins and 1 positive electrode pin. Pad A, pad B, and pad C are connected to the corresponding negative electrode pins respectively, and pad D is connected to the positive electrode pin. In addition, the LED chip includes a red LED chip, a blue LED chip, and a green LED chip. The red LED chip is fixed at the top of pad A by silver glue. The negative electrode of the red LED chip is connected to pad A, and the positive electrode of the red LED chip is connected to pad D through a gold wire (bonding wire). The blue LED chip and the green LED chip are both fixed at the top of pad B by transparent glue. The negative electrode of the blue LED chip is connected to pad C through a gold wire, and the positive electrode of the blue LED chip is connected to pad D through a gold wire (bonding wire). The negative electrode of the green LED chip is connected to pad C through a gold wire, and the positive electrode of the green LED chip is connected to pad D through a gold wire (bonding wire). The transparent encapsulation body is filled in the lamp cup, and the material of the transparent encapsulation body is high-temperature resistant and transparent silicone or resin or plastic. This RGB lamp bead adopts a common-anode connection method to form a lamp strip as shown in Figure 5 shown. By controlling the magnitude of the current, the brightness of the lamp bead is adjusted. The technology is mature and has high reliability.

[0034] Such as Figure 3As shown in the figure, the present invention provides an RGB lamp bead adapted to a special-shaped LED display screen, which includes an LED bracket, an LED chip, and a transparent encapsulation body. The LED bracket includes electrode pins and a diamond-shaped base. The base is fixedly arranged on the electrode pins by injection molding. A lamp cup is opened in the middle of the upper surface of the diamond-shaped base. There are 4 pads on the lamp cup, namely pad A, pad B, pad C, and pad D. Electrode pins corresponding to the pads one by one are fixed on the diamond-shaped base below the pads. The electrode pins penetrate through the diamond-shaped base and the lamp cup and are connected to the bottom of the pads. The LED chip is installed at one end of the pad away from the electrode pin. Among them, the electrode pins include 3 negative electrode pins and 1 positive electrode pin. Pad A, pad B, and pad C are connected to the corresponding negative electrode pins respectively, and pad D is connected to the positive electrode pin. In addition, the LED chip includes a red LED chip, a blue LED chip, and a green LED chip. The red LED chip is fixed to the top of pad A by silver glue. The negative electrode of the red LED chip is connected to pad A, and the positive electrode of the red LED chip is connected to pad D through a copper wire (bonding wire). The blue LED chip is fixed to the top of pad B by transparent glue. The negative electrode of the blue LED chip is connected to pad B through a copper wire (bonding wire), and the positive electrode of the blue LED chip is connected to pad D through another copper wire (bonding wire). The green LED chip is fixed to the top of pad C by transparent glue. The negative electrode of the green LED chip is connected to pad C through a copper wire (bonding wire), and the positive electrode of the green LED chip is connected to pad D through another copper wire (bonding wire). The blue LED chip, the green LED chip, and the red LED chip are arranged in an equilateral triangle. The electrode pins are fixedly installed at the middle and surrounding positions at the bottom of the diamond-shaped base (to improve the seismic resistance of the lamp bead). The transparent encapsulation body is filled in the lamp cup. The material of the transparent encapsulation body is high-temperature resistant and transparent silica gel or resin or plastic. This RGB lamp bead adopts a common-anode connection method to form a lamp strip as shown in Figure 5 shown, and the brightness of the lamp bead is adjusted by controlling the magnitude of the current. The technology is mature and has high reliability.

[0035] As Figure 5As shown in the figure, the present invention provides an RGB lamp bead adapted to a special-shaped LED display screen, which includes an LED bracket, an LED chip, and a transparent encapsulation body. The LED bracket includes electrode pins and a diamond-shaped base. The base is fixedly arranged on the electrode pins by injection molding. A lamp cup is opened in the middle of the upper surface of the diamond-shaped base. There are 4 pads on the lamp cup, namely pad A, pad B, pad C, and pad D. Electrode pins corresponding to the pads one by one are fixed on the diamond-shaped base below the pads. The electrode pins penetrate through the diamond-shaped base and the lamp cup and are connected to the bottom of the pads. The LED chip is installed at one end of the pad away from the electrode pin. Among them, the electrode pins include 3 positive electrode pins and 1 negative electrode pin. Pad A, pad B, and pad C are connected to the corresponding positive electrode pins respectively, and pad D is connected to the negative electrode pin. In addition, the LED chip includes a red LED chip, a blue LED chip, and a green LED chip. The red LED chip is fixed to the top of pad A by silver glue. The positive electrode of the red LED chip is connected to pad A, and the negative electrode of the red LED chip is connected to pad D through a gold wire (bonding wire). The blue LED chip and the green LED chip are both fixed to the top of pad B by transparent glue. The positive electrodes of the blue LED chip and the green LED chip are respectively connected to pad B (or pad C) through a gold wire (bonding wire), and the negative electrodes of the blue LED chip and the green LED chip are respectively connected to pad D through a gold wire (bonding wire). The transparent encapsulation body is filled in the lamp cup, and the material of the transparent encapsulation body is high-temperature resistant and transparent silica gel, resin, or plastic. This RGB lamp bead adopts a common cathode connection method to form a lamp strip as shown in Figure 5 shown, with low power consumption, high energy efficiency, and environmental and economic advantages.

[0036] By designing the shape of the base as diamond-shaped and moving the electrode pins inward, the present invention can effectively prevent the phenomenon that the edge lamp beads are easily detached due to external forces. By designing the shape of the base as diamond-shaped, the edge of the lamp bead changes from straight to oblique, which can effectively reduce the trapezoid effect and facilitate the integrity of the display when applied to the splicing of special-shaped LED screens. By designing the shape of the base as diamond-shaped, the light output rate can be effectively increased, the refraction of the light of the LED chip passing through the transparent encapsulation body on the surface of the base can be reduced, and the utilization rate of light can be improved.

[0037] Although the present invention has been described in detail by referring to the drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, those of ordinary skill in the art can make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions should all be within the scope of the present invention. / Any person familiar with the technical field of the present invention can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered within the protection scope of the present invention.

Claims

1. An RGB lamp bead suitable for special-shaped LED display screens, characterized in that: It comprises an LED bracket, an LED chip and a transparent package, wherein the LED chip comprises a red LED chip, a blue LED chip and a green LED chip, the LED bracket comprises an electrode pin and a diamond-shaped base, a lamp cup is provided in the middle of the upper surface of the diamond-shaped base, a plurality of pads are provided on the lamp cup, electrode pins corresponding to the pads are fixed on the diamond-shaped base below the pads, the electrode pins comprise a positive electrode pin and a negative electrode pin, the electrode pins penetrate the diamond-shaped base and the lamp cup and are connected to the bottom of the pads, the LED chip is installed at one end of the pad away from the electrode pin, a bonding wire is provided between the LED chip and the pad with opposite polarity to the installed pad; the transparent package is filled in the lamp cup; The pad includes a wick pad and an L-shaped pad arranged below the wick pad, the wick pad is arranged above the lamp cup, an LED chip is installed above the wick pad, the top of the L-shaped pad is connected to the bottom of the wick pad, and the electrode pin is connected to the bottom of the L-shaped pad; the L-shaped pad adopts a QFN type pad.

2. The RGB lamp bead adapted to a special-shaped LED display screen according to claim 1, characterized in that: The red LED chip is fixed on the top of the corresponding pad by silver glue, and the blue LED chip and the green LED chip are fixed on the top of the same pad by transparent glue.

3. The RGB lamp bead adapted to a special-shaped LED display screen according to claim 1, characterized in that: The electrode pins are fixedly mounted on the long beveled side of the diamond-shaped base.

4. The RGB lamp bead adapted to a special-shaped LED display screen according to claim 1, characterized in that: The blue LED chip and the green LED chip are fixed to the top of the corresponding pads by transparent glue, and are arranged in an equilateral triangle with the red LED chip. The electrode pins are fixed in the middle and around the bottom of the diamond-shaped base.

5. The RGB lamp bead adapted to a special-shaped LED display screen according to claim 1, characterized in that: When the blue LED chip and the green LED chip are mounted on the same pad, two bonding wires are arranged between the blue LED chip and the pad, one bonding wire is arranged between the blue LED chip and the pad with opposite polarity to the mounted pad, and the other bonding wire is arranged between the blue LED chip and the pad with the same polarity as the mounted pad; two bonding wires are arranged between the green LED chip and the pad, one bonding wire is arranged between the green LED chip and the pad with opposite polarity to the mounted pad, and the other bonding wire is arranged between the green LED chip and the pad with the same polarity as the mounted pad.

6. The RGB lamp bead adapted to a special-shaped LED display screen according to claim 1, characterized in that: The base is fixed on the electrode pin by injection molding.

7. The RGB lamp bead adapted to a special-shaped LED display screen according to claim 1, characterized in that: The electrode pins include three positive pins and one negative pin, and the red LED chip, the blue LED chip and the green LED chip are respectively mounted on the pads corresponding to the positive pins.

8. The RGB lamp bead adapted to a special-shaped LED display screen according to claim 1, characterized in that: The electrode pins include 1 positive pin and 3 negative pins, and the red LED chip, the blue LED chip and the green LED chip are respectively mounted on the pads corresponding to the negative pins.

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