CN220382099U - LED lamp bead with distributed chips and LED display screen - Google Patents

Abstract

The utility model discloses an LED lamp bead with distributed chips, which comprises a lamp bead bottom plate, a packaging colloid and a light-emitting chip set fixedly arranged above the lamp bead bottom plate. The lamp bead bottom plate is inserted in the packaging colloid. A layer of light-transmitting colloid is arranged in the packaging colloid. The light emitting chip set comprises a first light emitting set and a second light emitting set, and the first light emitting set and the second light emitting set comprise three types of light emitting chips of red, green and blue. The light emitting chips in the first light emitting group and the second light emitting group are distributed in a staggered mode. Through the structural arrangement of the lamp bead chip, the color cast problem of the lamp beads when being watched from all directions is improved. The color temperature drift problem of the display picture when the lamp beads are watched from different visual angles is solved. The utility model also discloses an LED display screen which comprises a plurality of the LED lamp beads with the distributed chips, wherein the lamp beads are uniformly distributed. The lamp beads are arranged in the display screen, so that the frame rate and the color display function of the LED display screen are effectively improved.

Description

LED lamp bead with distributed chips and LED display screen

Technical Field

The utility model belongs to the technical field of LED display, and particularly relates to an LED lamp bead with a distributed chip and an LED display screen.

Background

LED display technology is widely used in modern society. The display of the LEDs is mainly realized by virtue of LED lamp beads. In each LED lamp bead, there are red, green, blue three kinds of chips, these three kinds of chips can form the color of variegation through mixing light.

In the prior art, the interior of the lamp bead generally only comprises one red, green and blue chips, and the chips are arranged up and down. Because the three chips are light and thin and are positioned on the same bottom surface inside the lamp bead, the three chips have the same horizontal position. However, the viewing positions of people are different, because the chips are arranged up and down, when the chips are viewed from a vertical viewing angle (from top to bottom or from bottom to top), the chips are blocked from each other, so that the color of the viewed chips is not full, and thus, the color temperature drift problem of the display screen is caused.

Disclosure of Invention

The utility model aims to solve the technical problems that: the LED lamp bead with the distributed chips solves the problem that color temperature drift exists in a display picture when the lamp bead in the prior art is watched from different visual angles in the direct display process.

In order to solve the technical problems, the technical scheme adopted by the utility model is to provide the LED lamp bead with the distributed chips, which comprises a lamp bead bottom plate, a packaging colloid and a light-emitting chip set fixedly arranged above the lamp bead bottom plate; the lamp bead bottom plate is inserted into the packaging colloid; the lamp bead base plate comprises an electrode area and a pin area, wherein the electrode area is electrically connected with the light-emitting chip set, and the pin area is used as a power supply pin connected with a power supply; a layer of light-transmitting colloid is arranged in the packaging colloid, and the light-transmitting colloid covers the electrode area and the upper part of the light-emitting chip set; the light emitting chip set comprises a first light emitting set and a second light emitting set, wherein the first light emitting set and the second light emitting set comprise red, green and blue light emitting chips, the three light emitting chips in the first light emitting set are distributed in a triangular mode, the three light emitting chips in the second light emitting set are distributed in an inverted triangular mode, and the light emitting chips in the first light emitting set and the second light emitting set are distributed in a staggered mode.

In some embodiments, the first light emitting group includes a first red light chip, a first green light chip, and a first blue light chip, and the second light emitting group includes a second red light chip, a second green light chip, and a second blue light chip; the three light emitting chips in the first light emitting group are respectively arranged at three vertex angle positions of the triangular distribution, the three light emitting chips in the second light emitting group are respectively arranged at three vertex angle positions of the inverted triangular distribution, and the triangular distribution and the inverted triangular distribution are mutually staggered and overlapped.

In some embodiments, three vertexes of the inverted triangle distribution are respectively disposed at midpoints of three sides corresponding to the triangle distribution, and each light emitting chip is different from two adjacent light emitting chips of six light emitting chips after the triangle distribution and the inverted triangle distribution are overlapped in a staggered manner.

In some embodiments, three vertexes of the inverted triangle distribution are all arranged outside the midpoints of three sides corresponding to the triangle distribution, and each light emitting chip is different from two adjacent light emitting chips in six light emitting chips after the triangle distribution and the inverted triangle distribution are overlapped in a staggered manner.

In some embodiments, the electrode area includes an anode area and a cathode area, the bottom surfaces of the light emitting chips are fixed on the upper surface of the anode area through conductive colloid, and wires are connected between the upper surfaces of the light emitting chips and the cathode area respectively; the cathode region includes a first cathode region, a second cathode region, and a third cathode region; the light emitting chip group shares an anode region, the first red light chip and the second red light chip share a first cathode region, the first green light chip and the second green light chip share a second cathode region, and the first blue light chip and the second blue light chip share a third cathode region.

In some embodiments, the electrode area includes an anode area and a cathode area, the bottom surfaces of the light emitting chips are fixed on the upper surface of the cathode area through conductive colloid, and wires are connected between the upper surfaces of the light emitting chips and the anode area respectively; the anode region comprises a first anode region, a second anode region and a third anode region; the light emitting chip group shares a cathode region, the first red light chip and the second red light chip share a first anode region, the first green light chip and the second green light chip share a second anode region, and the first blue light chip and the second blue light chip share a third anode region.

In some embodiments, the packaging device further comprises a lamp shade, wherein the lamp shade covers over the packaging colloid.

In some embodiments, the lower surface of the lampshade is a first cambered surface, a downward concave refraction cambered surface is formed at the top of the light-transmitting colloid, and a refraction cavity is formed between the first cambered surface and the refraction cambered surface.

In some embodiments, the encapsulant and the light transmissive encapsulant are both epoxy.

The utility model also provides an LED display screen, which comprises a plurality of the LED lamp beads with the distributed chips, wherein the LED lamp beads with the distributed chips are uniformly distributed.

The beneficial effects of the utility model are as follows: the utility model discloses an LED lamp bead with distributed chips, which comprises a lamp bead bottom plate, a packaging colloid and a light-emitting chip set fixedly arranged above the lamp bead bottom plate. The lamp bead bottom plate is inserted into the packaging colloid; the lamp bead base plate comprises an electrode area and a pin area, wherein the electrode area is electrically connected with the light-emitting chip set, and the pin area is used as a power supply pin connected with a power supply. The inside of the packaging colloid is provided with a layer of light-transmitting colloid, and the light-transmitting colloid covers the electrode area and the upper part of the light-emitting chip set. The light emitting chip set comprises a first light emitting set and a second light emitting set, and the first light emitting set and the second light emitting set comprise three types of light emitting chips of red, green and blue. The three types of light emitting chips in the first light emitting group are distributed in a triangle shape, and the three types of light emitting chips in the second light emitting group are distributed in an inverted triangle shape. And the light emitting chips in the first light emitting group and the second light emitting group are distributed in a staggered way. Through the structural arrangement of the lamp bead chip, the color cast problem of the lamp beads when being watched from all directions can be effectively improved. The problem that the color temperature of a display picture drifts when the lamp beads are watched from different visual angles is effectively solved. The utility model also discloses an LED display screen which comprises a plurality of the LED lamp beads with the distributed chips, wherein the LED lamp beads with the distributed chips are uniformly distributed. The lamp beads are arranged in the display screen, so that the frame rate and the color display function of the LED display screen are effectively improved.

Drawings

FIG. 1 is a front cross-sectional block diagram of an LED lamp bead with a distributed chip of the present utility model;

FIG. 2 is a top view block diagram of an LED lamp bead with distributed chips according to the present utility model;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a top view block diagram of another embodiment of an LED lamp bead with distributed chips according to the present utility model;

FIG. 5 is an enlarged schematic view at B in FIG. 4;

FIG. 6 is a schematic diagram of a common anode for LED lamp beads with distributed chips according to the present utility model;

FIG. 7 is a schematic diagram of a common cathode for LED lamp beads with distributed chips according to the present utility model;

FIG. 8 is a front cross-sectional block diagram of another embodiment of an LED lamp bead with a distributed chip according to the present utility model;

fig. 9 is a schematic structural view of an LED display screen.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

Fig. 1 shows a front cross-sectional structure diagram of an LED lamp bead with distributed chips, and in combination with fig. 2 and 3, the LED lamp bead with distributed chips includes a lamp bead base plate 2, an encapsulation colloid 1, and a light emitting chip set 3 fixedly mounted above the lamp bead base plate 2.

The lamp bead bottom plate 2 is inserted into the encapsulation colloid 1. The bead base plate 2 includes an electrode area 21 and a lead area 22, and a portion of the bead base plate 2 located inside the encapsulation body 1 serves as the electrode area 21 and a portion of the bead base plate 2 located outside the encapsulation body 1 serves as the lead area 22. The electrode region 21 is electrically connected to the light emitting chip set 3. One side of the electrode area 21 extends out of the packaging colloid 1 to form a pin area 22, the pin area 22 is used as a power supply pin connected with a power supply, and a contact for supplying power to the pin area 22 is arranged on the PCB.

The inside of the packaging colloid 1 is provided with a layer of light-transmitting colloid 4, and the light-transmitting colloid 4 covers the electrode area 21 and the upper part of the light-emitting chip set 3. The upper surface of the light-transmitting colloid 4 is higher than the upper surface of the light-emitting chip 35 in the height direction.

Specifically, the encapsulation colloid 1 and the light-transmitting colloid 4 are both epoxy resin. The main function of the epoxy resin is to protect the internal structure of the lamp bead and shape the lamp bead. Meanwhile, the epoxy resin can slightly change the light-emitting color, the light-emitting brightness and the light-emitting angle of the lamp bead. The light-transmitting colloid 4 fills the inner cavity of the encapsulation colloid 1, covers the periphery and the upper surface of each light-emitting chip 35, and the edge outline of the light-transmitting colloid 4 is flush with the top of the encapsulation colloid 1. The transparent colloid 4 is in a fluid state before solidification, the transparent colloid 4 is molded through a specific die, a smooth cambered surface which is concave downwards can be obtained after solidification, and the degree of the concave downwards of the smooth cambered surface can be adjusted according to different dies.

Further, as shown in fig. 3 and 5, the light emitting chip set 3 includes a first light emitting group 31 and a second light emitting group 32, and the first light emitting group 31 and the second light emitting group 32 each include three types of light emitting chips 35 of red, green, and blue. The three types of light emitting chips 35 in the first light emitting group 31 are distributed 33 in a triangle shape, and the three types of light emitting chips 35 in the second light emitting group 32 are distributed 34 in an inverted triangle shape. And the light emitting chips 35 in the first light emitting group 31 and the second light emitting group 32 are alternately arranged.

The light emitting chips 35 of three colors of red, green and blue can form various colors after light mixing. The first light emitting group 31 and the second light emitting group 32 each include at least one of three light emitting chips 35 of red, green, and blue. The types of the light emitting chips 35 in the two groups are different, and the two groups are alternately arranged, so that the structure can show that at least one group of red, green and blue light emitting chips 35 can be always seen no matter the light emitting chips 35 are shielded when the light emitting chips 35 are seen from the up-down direction or the left-right direction of the lamp beads. Therefore, the picture presented by the lamp beads is not affected.

In some embodiments, the first light emitting group 31 includes a first red light chip R1, a first green light chip G1, and a first blue light chip B1, and the second light emitting group 32 includes a second red light chip R2, a second green light chip G2, and a second blue light chip B2. The three light emitting chips 35 in the first light emitting group 31 are disposed at the three vertex angle positions of the triangular distribution 33, respectively, and the three light emitting chips 35 in the second light emitting group 32 are disposed at the three vertex angle positions of the inverted triangular distribution 34, respectively. The triangular distribution 33 and the inverted triangular distribution 34 are superimposed with each other in a staggered manner.

In the above embodiment, the light emitting chip groups 3 include six light emitting chips 35 in total, each light emitting group includes three, and the light emitting chips 35 in each group are arranged in a triangle. It should be noted that, the positions of the three light emitting chips 35 in each group are not fixed and can be changed to be positioned at the three vertex angle positions, but the types of adjacent chips are different after the light emitting chips 35 of the two groups are overlapped. The arrangement is simple in structure and attractive in layout, and the required functions are realized under the condition of lower cost (using the least light emitting chips 35), namely the color cast problem of the lamp beads is solved.

Specifically, in conjunction with fig. 2 and 3, in some embodiments, three vertices of the inverted triangle profile 34 are disposed at respective midpoints of three sides of the triangle profile 33. Of the six light emitting chips 35 in which the triangular distribution 33 and the inverted triangular distribution 34 are alternately superimposed, each light emitting chip 35 is different in type from two light emitting chips 35 adjacent thereto.

In the triangular distribution 33, the first red light chip R1, the first green light chip G1, and the first blue light chip B1 of the first light emitting group 31 are located at the upper-middle, lower-left, and lower-right positions, respectively. In the inverted triangle distribution 34, the second red light chip R2, the second green light chip G2, and the second blue light chip B2 of the second light emitting group 32 are located in the middle-lower, left-middle, and right-middle positions, respectively. After the two sets of light emitting chips 35 are stacked, the three chips on each side are different. Taking the left-to-right view as an example, the first red light chip R1, the second blue light chip B2, and the first green light chip G1 can be seen. The light of the three colors is not blocked, and the picture after normal light mixing can be observed. Similarly, three different types of light emitting chips can be seen from top to bottom, from bottom to top, and from right to left, and will not be described again here.

Specifically, in conjunction with fig. 4 and 5, in some embodiments, the three vertices of the inverted triangle profile 34 are each disposed outside the midpoints of the three sides corresponding to the triangle profile 33. Of the six light emitting chips 35 in which the triangular distribution 33 and the inverted triangular distribution 34 are alternately superimposed, each light emitting chip 35 is different in type from two light emitting chips 35 adjacent thereto.

In the triangular distribution 33, the first red light chip R1, the first green light chip G1, and the first blue light chip B1 of the first light emitting group 31 are located at the upper-middle, lower-left, and lower-right positions, respectively. In the inverted triangle distribution 34, the second red light chip R2, the second green light chip G2, and the second blue light chip B2 of the second light emitting group 32 are located at the middle lower, upper left, and upper right positions, respectively. After the two sets of light emitting chips 35 are stacked, each chip and two chips adjacent to each chip emit light in different colors. Taking a left-to-right view as an example, a first red light chip R1, a second blue light chip B2, a first green light chip G1, and a second red light chip R2 can be seen. At least one light emitting chip 35 of each color is observed, and three colors of light are not blocked, so that a picture after normal light mixing can be seen. Similarly, three different types of light emitting chips can be seen from top to bottom, from bottom to top, and from right to left, and will not be described again here.

Further, in the present embodiment, as shown in fig. 6, in combination with fig. 1 and 2, the electrode area 21 includes an anode area 211 and a cathode area 212, the bottom surfaces of the light emitting chips 35 are fixed on the upper surface of the anode area 211 by the conductive adhesive 5, and the wires 6 are connected between the upper surfaces of the light emitting chips 35 and the cathode area 212, respectively. The cathode region 212 includes a first cathode region R (-), a second cathode region G (-), and a third cathode region B (-). The light emitting chip set 3 shares one anode region 211. The first red light chip R1 and the second red light chip R2 share a first cathode region R (-), the first green light chip G1 and the second green light chip G2 share a second cathode region G (-), and the first blue light chip B1 and the second blue light chip B2 share a third cathode region B (-).

The six light emitting chips 35 share the anode, so that unified power supply can be realized, and energy sources are effectively saved. The light emitting chips 35 of each color share the same cathode, so that accurate voltage distribution can be ensured.

In some embodiments, as shown in fig. 7 (the structure is not shown), the electrode region 21 includes an anode region 211 and a cathode region 212, the bottom surfaces of the plurality of light emitting chips 35 are fixed on the upper surface of the cathode region 212 by the conductive paste 5, and the wires 6 are connected between the upper surfaces of the plurality of light emitting chips 35 and the anode region 211, respectively. The anode region 211 includes a first anode region R (+) and a second anode region G (+) and a third anode region B (+). The light emitting chip set 3 shares one cathode region 212. The first red light chip R1 and the second red light chip R2 share a first anode region R (+), the first green light chip G1 and the second green light chip G2 share a second anode region G (+), and the first blue light chip B1 and the second blue light chip B2 share a third anode region B (+).

The six light emitting chips 35 share the cathode and are separately powered, so that the distribution voltage can be precisely controlled, and the power consumption is effectively reduced. The light emitting chips 35 of each color share the same anode, so that the light emitting chips 35 of the same color can be uniformly supplied with power.

Further, in this embodiment, the conductive paste 5 is silver paste. The silver colloid mainly plays roles of adhesion and conductivity.

The wire 6 may be a gold wire, a silver wire, a copper wire, or an alloy wire. In this embodiment, gold wires are preferable, and the gold wires have stable performance, can prevent oxidation, and can ensure stable contact between the cathode region 212 and the light emitting chip 35.

Further, in some embodiments, as shown in fig. 8, the LED lamp bead with the distributed chips further includes a lamp cover 7, where the lamp cover 7 covers over the encapsulant 1. The lower surface of the lamp shade 7 is a first cambered surface 71, and the top of the light-transmitting colloid 4 is provided with a downward concave refraction cambered surface 41. A refractive cavity 411 is formed between the first cambered surface 71 and the refractive cambered surface 41.

The lampshade 7 is covered above the refraction cambered surface 41 of the light-transmitting colloid 4, and the two are combined to form an air cavity, namely a refraction cavity 411. Due to the refraction of the light, the light emitting chip 35 emits the mixed light toward the refraction cavity 411. In the refraction cavity 411, through air re-refraction, the light path changes, the light emitting angle becomes larger, and the light source emitted by the light emitting chip 35 is changed into a surface light source from a point light source, so that when the light emitting chip is watched from all directions, the light emitting color of the lamp bead keeps original color tone, color temperature deviation cannot be generated, and the problem of color temperature drift of the lamp bead is more efficiently solved.

As shown in fig. 9, an LED display screen 9 includes a plurality of the LED light beads 8 with distributed chips, where the plurality of LED light beads 8 with distributed chips are uniformly distributed.

After the LED lamp bead 8 with the distributed chips is improved, the luminous area is effectively enlarged, and the problem of color temperature deviation of the lamp bead is solved. Therefore, it is mounted in the LED display screen 9 as shown in fig. 9, and the frame rate and color display function of the LED display screen 9 can be effectively improved. When the LED display screen 9 is watched, the picture colors of the LED display screen 9 are consistent from different directions, so that the look and feel can be effectively improved. Meanwhile, a plurality of lamp beads are uniformly distributed in the figure and are arranged in a matrix. This way not only is compact, fully utilizes the space of the LED display screen 9, but also maintains the aesthetics of the layout.

Therefore, the utility model discloses an LED lamp bead with a distributed chip, which comprises a lamp bead bottom plate, a packaging colloid and a light-emitting chip set fixedly arranged above the lamp bead bottom plate. The lamp bead bottom plate is inserted into the packaging colloid; the lamp bead base plate comprises an electrode area and a pin area, wherein the electrode area is electrically connected with the light-emitting chip set, and the pin area is used as a power supply pin connected with a power supply. The inside of the packaging colloid is provided with a layer of light-transmitting colloid, and the light-transmitting colloid covers the electrode area and the upper part of the light-emitting chip set. The light emitting chip set comprises a first light emitting set and a second light emitting set, and the first light emitting set and the second light emitting set comprise three types of light emitting chips of red, green and blue. The three types of light emitting chips in the first light emitting group are distributed in a triangle shape, and the three types of light emitting chips in the second light emitting group are distributed in an inverted triangle shape. And the light emitting chips in the first light emitting group and the second light emitting group are distributed in a staggered way. Through the structural arrangement of the lamp bead chip, the color cast problem of the lamp beads when being watched from all directions can be effectively improved. The problem that the color temperature of a display picture drifts when the lamp beads are watched from different visual angles is effectively solved. The utility model also discloses an LED display screen which comprises a plurality of the LED lamp beads with the distributed chips, wherein the LED lamp beads with the distributed chips are uniformly distributed. The lamp beads are arranged in the display screen, so that the frame rate and the color display function of the LED display screen are effectively improved.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the present utility model and the accompanying drawings, or direct or indirect application in other related technical fields, are included in the scope of the present utility model.

Claims (10)

1. The LED lamp bead with the distributed chips is characterized by comprising a lamp bead bottom plate, packaging colloid and a luminous chip set fixedly arranged above the lamp bead bottom plate;

the lamp bead bottom plate is inserted into the packaging colloid; the lamp bead base plate comprises an electrode area and a pin area, wherein the electrode area is electrically connected with the light-emitting chip set, and the pin area is used as a power supply pin connected with a power supply;

a layer of light-transmitting colloid is arranged in the packaging colloid, and the light-transmitting colloid covers the electrode area and the upper part of the light-emitting chip set;

the light emitting chip set comprises a first light emitting set and a second light emitting set, wherein the first light emitting set and the second light emitting set comprise red, green and blue light emitting chips, the three light emitting chips in the first light emitting set are distributed in a triangular mode, the three light emitting chips in the second light emitting set are distributed in an inverted triangular mode, and the light emitting chips in the first light emitting set and the second light emitting set are distributed in a staggered mode.

2. The LED lamp bead with distributed chips of claim 1, wherein the first light emitting group comprises a first red light chip, a first green light chip, and a first blue light chip, and the second light emitting group comprises a second red light chip, a second green light chip, and a second blue light chip; the three light emitting chips in the first light emitting group are respectively arranged at three vertex angle positions of the triangular distribution, the three light emitting chips in the second light emitting group are respectively arranged at three vertex angle positions of the inverted triangular distribution, and the triangular distribution and the inverted triangular distribution are mutually staggered and overlapped.

3. The LED lamp bead with distributed chips of claim 2, wherein three vertexes of the inverted triangle distribution are respectively disposed at midpoints of three sides corresponding to the triangle distribution, and each of the six light emitting chips after the staggered superposition of the triangle distribution and the inverted triangle distribution is different from two light emitting chips adjacent to each other in type.

4. The LED lamp bead with distributed chips of claim 2, wherein the three vertices of the inverted triangle distribution are each disposed outside the midpoints of the three sides corresponding to the triangle distribution, and each of the six light emitting chips after the staggered superposition of the triangle distribution and the inverted triangle distribution is different from the two light emitting chips adjacent to each other in type.

5. The LED lamp bead with distributed chips according to claim 3 or 4, wherein the electrode area comprises an anode area and a cathode area, the bottom surfaces of the plurality of light emitting chips are fixed on the upper surface of the anode area through conductive colloid, and wires are connected between the upper surfaces of the plurality of light emitting chips and the cathode area respectively; the cathode region includes a first cathode region, a second cathode region, and a third cathode region; the light emitting chip group shares an anode region, the first red light chip and the second red light chip share a first cathode region, the first green light chip and the second green light chip share a second cathode region, and the first blue light chip and the second blue light chip share a third cathode region.

6. The LED lamp bead with distributed chips according to claim 3 or 4, wherein the electrode area comprises an anode area and a cathode area, the bottom surfaces of the plurality of light emitting chips are fixed on the upper surface of the cathode area through conductive colloid, and wires are connected between the upper surfaces of the plurality of light emitting chips and the anode area respectively; the anode region comprises a first anode region, a second anode region and a third anode region; the light emitting chip group shares a cathode region, the first red light chip and the second red light chip share a first anode region, the first green light chip and the second green light chip share a second anode region, and the first blue light chip and the second blue light chip share a third anode region.

7. The LED lamp bead with distributed chips of any of claims 1-4, further comprising a lamp cover over the encapsulant.

8. The LED lamp bead with distributed chips of claim 7, wherein the lower surface of the lamp cover is a first cambered surface, the top of the light-transmitting colloid is formed with a downward concave refraction cambered surface, and a refraction cavity is formed between the first cambered surface and the refraction cambered surface.

9. The LED lamp bead with distributed chips of any of claims 1-4, wherein the encapsulant and the light transmissive encapsulant are both epoxy.

10. An LED display screen comprising a plurality of LED beads with distributed chips according to any one of claims 1 to 9, wherein the plurality of LED beads with distributed chips are uniformly distributed.