Chip lamp bead and lamp

Abstract

The invention provides a chip lamp bead and a lamp, and relates to the technical field of lamp beads, the chip lamp bead comprises a packaging body and a lamp bead body packaged in the packaging body; wherein the lamp bead body comprises a substrate, and a first luminous body, a second luminous body and a control chip which are arranged on the substrate. The white light illuminant and the illuminant of the preset color system are integrated in one lamp bead, different lamp beads and different colors of the lamp beads can be controlled in a unified mode through the control chip, and the functionality and flexibility of the illumination and decoration lamp system are improved. On the basis of the white LED, the color temperature adjustment of the preset color system from the warm color tone to the cold color tone can be realized by adjusting the proportion of white LEDs (such as warm white and cold white) with different color temperatures. Moreover, the color of single-color blue light is purer, the color of single-color white light or warm white light is more consistent, and the yield can be increased to 99% or above.

Description

Technical Field

[0001] The present invention relates to the technical field of lamp beads, and in particular to a chip lamp bead and a lamp. Background Art

[0002] Existing CHIP LED lights are mostly monochromatic lights such as red, green, blue, warm white, and white light, or multi-color lights such as R, G, and B combination two-color and three-color lights, which are packaged into lamp beads by molding transparent glue or fluorescent glue on monochromatic LED chips. During the production process, each color of LED chip needs to be packaged separately and then assembled, and the position and connection of each chip need to be precisely controlled, which makes the entire production process very complicated, the production efficiency is low, and the production cost is increased. There are disadvantages such as slow production, high cost, and complex production process to achieve full-color R, G, B and white light and warm white light lighting in the same area at the same time.

[0003] Moreover, existing technologies make it difficult to integrate multiple colors (R, G, B) and white light of different color temperatures (cold white, warm white) into the same lamp bead, and it is impossible to achieve the full-color R, G, B and white light, warm white light (RGBW / RGBCW) fantasy function of the light string. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a chip lamp bead and a lamp, which is an integrated single-lamp light source capable of realizing simultaneous control and emission of full-color and multi-color systems of a single lamp.

[0005] In the first aspect, an embodiment of the present invention provides a chip lamp bead, comprising: a package body, and a lamp bead body encapsulated in the package body; wherein the lamp bead body comprises a substrate, and a first light-emitting body, a second light-emitting body and a control chip arranged on the substrate; the first light-emitting body and the second light-emitting body are respectively connected to the control ends corresponding to the control chip; wherein the first light-emitting body is a light-emitting body of a preset color system, and the second light-emitting body is a light-emitting body of a white light color system; the control chip is used to respond to a control signal and control the lighting of the first light-emitting body and / or the second light-emitting body based on the control signal.

[0006] In combination with the first aspect, an embodiment of the present invention provides a first implementation of the first aspect, wherein the substrate includes a first substrate and a second substrate, the control chip is installed on the first substrate through a preset bonding process, and the first light-emitting body and the second light-emitting body are installed on the second substrate through a preset bonding process.

[0007] In combination with the first aspect, an embodiment of the present invention provides a second implementation of the first aspect, wherein the control end of the control chip is arranged toward the second substrate.

[0008] In combination with the first aspect, an embodiment of the present invention provides a third implementation of the first aspect, wherein the second substrate includes an extension portion, the extension portion is far away from the first substrate; the first light-emitting body and the second light-emitting body are arranged on a side close to the first substrate.

[0009] In combination with the first aspect, an embodiment of the present invention provides a fourth implementation of the first aspect, wherein the first substrate includes a signal access terminal, the control chip includes a signal pin, and the signal pin is connected to the signal access terminal.

[0010] In combination with the first aspect, an embodiment of the present invention provides a fifth implementation of the first aspect, wherein the chip lamp bead also includes a light-emitting body fixing structure; the substrate is installed on one end face of the light-emitting body fixing structure; the other end face of the light-emitting body fixing structure is provided with a first connection structure corresponding to the control chip, and a second connection structure corresponding to the first light-emitting body and the second light-emitting body.

[0011] In combination with the first aspect, an embodiment of the present invention provides a sixth implementation of the first aspect, wherein the first light-emitting body includes at least one sub-light-emitting body, and the number of the sub-light-emitting bodies corresponds to the number of single colors of the preset color system.

[0012] In combination with the first aspect, the embodiment of the present invention provides a seventh implementation of the first aspect, wherein the second light-emitting body is a surface-mounted LED.

[0013] In combination with the first aspect, an embodiment of the present invention provides an eighth implementation of the first aspect, wherein the control chip, the first light-emitting body and / or the second light-emitting body are mounted on the second substrate by face-down mounting or flip-down mounting.

[0014] In a second aspect, an embodiment of the present invention provides a lamp, which is equipped with a chip lamp bead according to any of the above embodiments.

[0015] A chip lamp bead and lamp provided by an embodiment of the present invention integrate a white light emitter and a light emitter of a preset color system in one lamp bead, and can uniformly control different lamp beads through a control chip, thereby improving the functionality and flexibility of the lighting system. Not only can rich color effects and dynamic lighting effects be achieved, but also energy efficiency can be improved. On the basis of white LEDs, the color temperature adjustment of the preset color system from warm to cool tones can be achieved by adjusting the ratio of white LEDs with different color temperatures (such as warm white and cool white), which can enhance the user experience and provide a variety of intelligent functions. Moreover, the color under monochromatic blue light is purer blue light, and the color of monochromatic white light or warm white light is more consistent, and the yield can be increased to more than 99%.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of a chip lamp bead provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of another chip lamp bead provided in an embodiment of the present invention;

[0021] Figure 3 A structural diagram of a chip lamp bead provided in an embodiment of the present invention;

[0022] Figure 4 for Figure 3 Schematic diagram of the back side of the corresponding chip lamp bead.

[0023] Icon: 10 - packaging body; 20 - substrate; 11 - control chip; 12 - first light-emitting body; 13 - second light-emitting body; 21 - first substrate; 211 - signal access terminal; 22 - second substrate; 221 - extension part; 31 - first connection structure; 32 - second connection structure. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In order to solve the above technical problems, the present invention provides a chip lamp bead and a lamp, which can realize an integrated single-lamp light source in which full-color and multi-color systems are controlled and emitted at the same time.

[0026] To facilitate understanding of this embodiment, a chip lamp bead disclosed in an embodiment of the present invention is first introduced in detail. Figure 1 FIG. 1 shows a schematic diagram of the structure of a chip lamp bead provided by an embodiment of the present invention. Figure 1 As shown, the chip lamp bead includes: a package 10, and a lamp bead body encapsulated in the package 10. Among them, the lamp bead body includes a substrate 20, and a first light emitter 12, a second light emitter 13 and a control chip 11 arranged on the substrate 20. The package 10 is the shell of the entire LED lamp bead, which is usually made of transparent or translucent materials, such as epoxy resin or other transparent packaging materials such as silicone. The package 10 not only protects the internal light emitter and the control chip 11, but also provides optical properties, such as transmittance and scattering characteristics. In the specific implementation, according to the design requirements, the packaging material can be injected into the substrate 20 using a mold to form the required packaging shape. Among them, the first light emitter 12 is a light emitter of a preset color system, such as red, green or blue. This LED chip emits light of a specific wavelength when powered on. The second light emitter 13 is a light emitter of a white system, such as white light or warm white light. The first light emitter 12 and the second light emitter 13 are respectively connected to the control ends corresponding to the control chip 11. The control chip 11 is used to respond to the control signal and control the first light-emitting body 12 and / or the second light-emitting body 13 to light up based on the control signal.

[0027] The substrate 20 is the basis for carrying all components, and is usually made of ceramic or aluminum substrate 20, which has good thermal conductivity and electrical insulation. A soldering pad is provided on the substrate 20 for fixing and connecting various components. The embodiment of the present invention is designed with a light emitter of a preset color system (the first light emitter 12) and a light emitter of a white system (the second light emitter 13), and these light emitters are independently controlled by a control chip 11. The control chip 11 is responsible for receiving external control signals and controlling the working states of the first light emitter 12 and the second light emitter 13 according to these signals. For example, if the control signal requires lighting red and white, the control chip 11 will activate the corresponding output port so that the red LED and the white LED are lit at the same time. It should be noted that the functions that the control chip 11 can achieve include but are not limited to: Independent control: Control the lighting and extinguishing of the first light emitter 12 and the second light emitter 13 respectively. Brightness adjustment: Adjust the brightness of each light emitter through PWM (pulse width modulation) technology. Color mixing: By controlling the brightness ratio of different light emitters, a mixture of multiple colors is achieved, thereby generating different color effects.

[0028] In summary, a chip lamp bead provided by an embodiment of the present invention integrates white light and light of a preset color system in one lamp bead, and can uniformly control lamp beads of different color systems through a control chip, thereby improving the functionality and flexibility of the lighting system. It can not only achieve rich color effects and dynamic lighting effects, but also improve energy efficiency. On the basis of white LEDs, the ratio of white LEDs with different color temperatures (such as warm white and cool white) can be adjusted to achieve color temperature adjustment of the preset color system from warm to cool tones, which can enhance the user experience and provide a variety of intelligent functions.

[0029] Furthermore, based on the above embodiment, the embodiment of the present invention also provides another chip lamp bead, wherein: Figure 2 FIG. 1 shows a schematic diagram of the structure of another chip lamp bead provided by an embodiment of the present invention. Figure 2 As shown, the substrate includes a first substrate 21 and a second substrate 22, the control chip is mounted on the first substrate 21 by a preset solid crystal process, and the first light emitter and the second light emitter are mounted on the second substrate 22 by a preset solid crystal process. The embodiment of the present invention is designed with a separate substrate, and the chip lamp beads are modularly designed, and the control chip and the light emitter are separately mounted on different substrates, which is convenient for production and maintenance. Moreover, the position and size of the first substrate 21 and the second substrate 22 can be adjusted according to actual needs to improve design flexibility.

[0030] In the specific implementation, according to the chip-type fantasy or point control substrate with different functions, the first light-emitting body (the required color lamp bead) and the second light-emitting body (white light or warm white light) can be welded to the corresponding substrate position by silver glue or solder paste welding. Among them, a suitable substrate material can be selected, such as an aluminum substrate or a ceramic substrate. According to the design requirements of the LED lamp beads, the pad position is pre-set on the substrate. Further, the first light-emitting body and the second light-emitting body are welded by silver glue or solder paste. Silver glue: Use conductive silver glue to fix the white light and color lamp beads to the corresponding positions on the substrate. Silver glue not only has good conductivity, but also provides a certain heat dissipation effect. Solder paste: Use lead-free solder paste to fix the lamp beads on the substrate by reflow soldering, which is suitable for mass production, low cost and high reliability. The control chip (such as the point control IC) can use conductive silver glue or solder paste to fix the point control IC to the specified position on the substrate.

[0031] Further, the control chip, the first light-emitting body and / or the second light-emitting body are mounted on the second substrate 22 by face-up or flip-up. Forward process: Place the LED chip (including white light and color lamp beads) on the substrate with the front side facing up. Use gold wire or copper wire to connect the electrodes of the LED chip to the pads on the substrate through a wire bonding machine. Place the point control IC on the substrate with the front side facing up, and use gold wire or copper wire to connect the pins of the IC to the pads on the substrate. Flip-chip process: Place the LED chip on the substrate with the back side facing up, and directly connect the electrodes of the chip to the pads on the substrate through the bump welding technology. Place the point control IC on the substrate with the back side facing up, and connect the pins of the IC to the pads on the substrate through the bump welding technology. The flip-chip process can reduce the length of the welding wire and improve the heat dissipation performance and reliability. Further, the packaged LED lamp beads are placed in an oven for curing to ensure that the packaging material is completely hardened and firmly wraps the LED chip and the control chip. The control chip of the embodiment of the present invention can be a color IC or a point control IC. The color IC is used to generate and control multiple colors and dynamic effects (such as gradient, flashing, etc.). The point control IC is used to accurately control the brightness and color of each lamp bead, and is often used for pixel-level control.

[0032] The control end of the control chip of the embodiment of the present invention is arranged toward the second substrate 22, which can reduce the length of the signal transmission path, simplify circuit wiring, and reduce signal delay and interference. The distance between the control chip and the light-emitting body is closer, and efficient integration can be performed in a smaller space, making the entire lamp bead structure more compact, convenient for overall packaging and installation, and convenient for miniaturized design.

[0033] Furthermore, the second substrate 22 includes an extension portion 221, and the extension portion 221 is away from the first substrate 21; the first light emitter and the second light emitter are arranged on the side close to the first substrate 21. Through the design of the extension portion 221, the first light emitter and the second light emitter can be located at the center of the lamp bead, so that the light can be distributed more evenly and the lighting effect can be improved. The light emitter at the center position can reduce the shadow caused by the structure and provide more uniform lighting. In addition, the extension portion 221 can serve as an additional heat dissipation area to help disperse heat and improve the overall heat dissipation effect.

[0034] Furthermore, the control chip includes a signal pin, which is used to output a control signal. The control chip only needs one signal input terminal to realize complex fantasy driving, which simplifies the design of external connections. The number of interfaces that need to be connected is reduced, and the complexity of the system is reduced. In addition, the first substrate 21 includes a signal access terminal 211, and the signal pin of the control chip is directly connected to the signal access terminal 211 of the first substrate 21, which simplifies the circuit design and improves the signal transmission quality and system integration. Moreover, the control chip of the embodiment of the present invention can be easily integrated into different systems as an independent module. New functions can be added by updating the firmware or software of the control chip without changing the hardware design.

[0035] Furthermore, the first light-emitting body of the embodiment of the present invention includes at least one sub-light-emitting body, and the number of sub-light-emitting bodies corresponds to the number of single colors in the preset color system. Among them, the preset color system includes three color systems of RGB (red, green, and blue), and there can be three sub-light-emitting bodies, such as one for each color system, or other color systems and numbers of lamp beads can be selected according to needs, such as yellow (red + green), cyan (green + blue), purple (red + blue), etc. Through different combinations of sub-light-emitting bodies, a variety of colors and tones can be generated to achieve richer color expression. Each sub-light-emitting body corresponds to a specific color, and high-precision color adjustment can be achieved by precisely controlling the brightness of each sub-light-emitting body. In the embodiment of the present invention, the sub-light-emitting bodies of the first light-emitting body are R, G, and B chips, which are independent light-emitting areas, corresponding to red, green, and blue, respectively. Correspondingly, Figure 3 The structure diagram of a chip lamp bead provided by an embodiment of the present invention is shown. Figure 3 In the embodiment, the first luminous body has three sub-luminous bodies, which are arranged in parallel. In one embodiment, they can be R, G, and B chips from top to bottom. The second luminous body is located at the side of the first luminous body, and the entire lamp bead has a compact structure. Figure 3 This is a schematic diagram of the flip-chip structure of the chip lamp bead. Figure 3 The first luminous body shown is the installation position of the sub-luminous body of the preset color system (such as the above-mentioned chip), and white solder resist is provided in the middle. The area where the first luminous body is located is the second substrate position, and the second substrate is connected to the extension part. Figure 3 In the embodiment, the extension part is connected to the positive electrode of the lamp bead, the first substrate is connected to the negative electrode of the lamp bead, and the signal access end is the input end of the lamp bead. Figure 3 In the embodiment, a mark is also provided on the lower side of the first substrate for identifying the negative electrode.

[0036] Furthermore, combined with Figure 3, the second light-emitting body of the embodiment of the present invention is a surface-mounted LED, namely SMD LED (Surface-Mounted Device LED). The LED is a small-sized chip-type lamp bead with a small size and is suitable for high-density installation, especially for applications with limited space. In specific implementation, it can be 0201 (size is 0.6mm x 0.3mm), 0402 (size is 1.0mm x 0.5mm) and other types. The white light-emitting body includes quasi-white light: refers to the color close to natural light, and the color temperature is approximately between 4000K and 6500K; warm white light: the color temperature is lower, usually between 2700K and 3500K. In Figure 3 In the embodiment, the second light emitter is a Warm White LED lamp bead.

[0037] The prior art usually excites yellow phosphor through a blue LED chip, converting part of the blue light into yellow light. The blue light and yellow light are mixed to form white light. Due to the conversion efficiency and color uniformity of the phosphor, the generated white light may not be pure enough, and color temperature deviation or color unevenness may occur. In an embodiment of the present invention, a white light LED or a warm white light LED is packaged as a small-sized chip-type lamp bead to achieve white light or warm white light. The embodiment of the present invention directly uses a control chip to drive a white-based light emitter (such as a white light LED chip) instead of converting through phosphors. The directly generated white light is purer, the color temperature is more stable, and the yield can be increased to more than 99%. It avoids the problem of color unevenness that may occur during the phosphor conversion process, and it can also reduce the loss of energy during the phosphor conversion process, thereby improving the overall luminous efficiency. Furthermore, since each light source is controlled by a control chip individually, not only is the color of monochromatic white light or warm white light more consistent, the color of monochromatic blue light is purer, and the same is true for other color systems, it can realize the full-color R, G, B and white light, warm white light four-channel or five-channel (RGBW / RGBCW) fantasy color function of light strings and decorative products. Dynamic effects such as flashing, gradient, breathing light, etc. can also be achieved by programming the control chip. It is suitable for various application scenarios, such as stage lighting, smart home, decorative lighting, etc.

[0038] Furthermore, the chip lamp bead also includes a light-emitting body fixing structure; the substrate is installed on one end face of the light-emitting body fixing structure; the other end face of the light-emitting body fixing structure is provided with a first connecting structure 31 corresponding to the control chip, and a second connecting structure 32 corresponding to the first light-emitting body and the second light-emitting body. Figure 4 The back side diagram of the chip lamp bead is shown. Figure 4For example, the light-emitting body fixing structure is a patch structure, and the connection structure on the other end surface thereof includes an input terminal, a cathode and an anode, wherein the corresponding positions of the first substrate 21 are the input terminal and the cathode, and the corresponding positions of the second substrate 22 are the anode. A green strip is arranged between each connection structure, which is made of copper foil or other conductive materials and coated with a green solder mask to prevent short circuit and corrosion. These conductive paths ensure that the current can be smoothly transmitted from the input terminal to the cathode and the anode, thereby driving the light-emitting body (such as LED) to work.

[0039] Further, on the basis of the above embodiments, the embodiments of the present invention also provide a lamp, which is equipped with the chip lamp beads of any of the above embodiments. The above chip lamp beads can be widely used in various lamps, from household lighting to professional equipment. In one embodiment, it can be high-end lighting equipment, indoor lighting: such as chandeliers, wall lamps, table lamps, etc. Commercial lighting: such as lighting systems in shopping malls, hotels, offices and other places. Industrial lighting: such as factories, warehouses, etc., which require high brightness and stability. It can also be applied to display devices, such as LCD / LED displays: for TVs, computer monitors, mobile phone screens, etc. OLED displays: high-end display devices, such as professional-grade displays, smart watches, etc. Alternatively, it can also be applied to medical equipment, such as surgical lights, treatment lights, and applied to scientific research instruments such as fluorescence microscopes, spectrometers, etc. It should be noted that the implementation principle and technical effects of the lamp provided in the embodiment of the present invention are the same as those of the aforementioned chip lamp bead embodiment. For the sake of brief description, the parts not mentioned in the lamp embodiment can refer to the corresponding contents in the aforementioned chip lamp bead embodiment.

[0040] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A chip lamp bead, characterized in that: include: A packaging body, and a lamp bead body packaged in the packaging body; Wherein, the lamp bead body includes a substrate, and a first light-emitting body, a second light-emitting body and a control chip arranged on the substrate; The first light emitter and the second light emitter are respectively connected to the control terminals corresponding to the control chip; wherein the first light emitter is a light emitter of a preset color system, and the second light emitter is a light emitter of a white light system; The control chip is used to respond to a control signal and control the lighting of the first light-emitting body and / or the second light-emitting body based on the control signal.

2. The chip lamp bead according to claim 1, characterized in that: The substrate includes a first substrate and a second substrate, the control chip is mounted on the first substrate through a preset die bonding process, and the first light-emitting body and the second light-emitting body are mounted on the second substrate through a preset die bonding process.

3. The chip lamp bead according to claim 2, characterized in that: The control end of the control chip is arranged toward the second substrate.

4. The chip lamp bead according to claim 2, characterized in that: The second substrate comprises an extension portion, and the extension portion is away from the first substrate; The first light emitting body and the second light emitting body are arranged on a side close to the first substrate.

5. The chip lamp bead according to claim 2, characterized in that: The first substrate includes a signal access terminal, and the control chip includes a signal pin, and the signal pin is connected to the signal access terminal.

6. The chip lamp bead according to claim 1, characterized in that: The chip lamp bead also includes a light-emitting body fixing structure; the substrate is mounted on one end surface of the light-emitting body fixing structure; The other end surface of the light-emitting body fixing structure is provided with a first connection structure corresponding to the control chip, and a second connection structure corresponding to the first light-emitting body and the second light-emitting body.

7. The chip lamp bead according to claim 1, characterized in that: The first light-emitting body includes at least one sub-light-emitting body, and the number of the sub-light-emitting bodies corresponds to the number of single colors of the preset color system.

8. The chip lamp bead according to claim 1, characterized in that: The second light emitting body is a surface mounted LED.

9. The chip lamp bead according to claim 2, characterized in that: The control chip, the first light-emitting body and / or the second light-emitting body are mounted on the second substrate by face-down mounting or flip-down mounting.

10. A lamp, characterized in that: The lamp is equipped with the chip lamp bead according to any one of claims 1 to 9.

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