A light-emitting device and its control method, a lamp

Abstract

The application discloses a light-emitting device and a control method thereof and a lamp, comprising a light guide plate, a light guide, a green light-emitting component and a red and blue light-emitting component. The light guide light-out surface faces the light guide plate, the green light-emitting component output end faces the light guide, emits green light to the light guide, and the green light enters the light guide plate through the light guide light-out surface after being transmitted by the light guide; the red and blue light-emitting component output end faces the light guide, emits red and blue light to the light guide, and the red and blue light enters the light guide, mixes with the green light inside the light guide to form composite light, and the composite light enters the light guide plate through the light guide light-out surface, is further diffused and homogenized inside the light guide plate, and finally realizes the uniform RGB light mixing effect. The light-emitting device effectively reduces the use demand of independent RGB lamp beads, independently configures the green light chip, avoids the waste problem that the green light chip efficiency is too high and the power is often reduced in the traditional RGB packaging, ensures the color uniformity and richness of the light guide plate output light, and reduces the overall cost of the lamp bead.

Description

Technical Field

[0001] This application relates to the field of lighting technology, and in particular to a light-emitting device and its control method, and a lamp. Background Technology

[0002] With the popularization of LED light source technology, LED-based ambient lighting has been widely used in automotive interiors, home lighting, and other scenarios. To meet users' demands for uniform light efficiency and diverse light colors, light guide plates are often used as surface light source carriers, working in conjunction with RGB LEDs to achieve multi-color lighting effects. Current technologies typically use multiple RGB LEDs as the light source, each containing red, green, and blue chips. Color mixing is achieved by adjusting the driving current of the chips emitting different colors. However, due to the characteristics of blue and red light, the luminous efficiency of green chips is significantly higher than that of red and blue chips. To maintain color balance, it is often necessary to reduce the operating current of the green light, preventing it from operating at its rated power and thus not fully utilizing its potential. This results in insufficient light energy utilization and exacerbates unnecessary cost waste. Summary of the Invention

[0003] This application aims to address at least one of the technical problems existing in the prior art. This application provides a light-emitting device and its control method, as well as a lamp, which separates green light from red and blue light, effectively improving luminous efficiency and light uniformity while reducing overall cost.

[0004] The light-emitting device according to a first aspect embodiment of this application includes:

[0005] Light guide plate;

[0006] A light guide, wherein the light-emitting surface of the light guide faces the light guide plate;

[0007] A green light-emitting component, wherein the green light-emitting component is used to emit green light to the light guide;

[0008] The red and blue light-emitting component is used to emit red and blue light into the light guide, so that the red, blue and green light are mixed with the light guide to form composite light, and the composite light enters the light guide plate through the light-emitting surface of the light guide.

[0009] The light-emitting device according to the embodiments of this application has at least the following beneficial effects:

[0010] The light-emitting device of this application includes a light guide plate, a light guide, a green light-emitting component, and a red and blue light-emitting component. The light guide is arranged on the side of the light guide plate, with its light-emitting surface facing the light guide plate. The output end of the green light-emitting component faces the light guide and is used to emit green light into the light guide. After entering the light guide, the green light undergoes total internal reflection and then enters the light guide plate through its light-emitting surface. The output ends of the red and blue light-emitting components face the light guide and are used to simultaneously emit red and blue light into the light guide. After entering the light guide, the red and blue light couple and mix with the green light emitted from the green light-emitting component inside the light guide to form composite light. The composite light then enters the light guide plate together through the light-emitting surface of the light guide, where it is further diffused and homogenized inside the light guide plate, ultimately achieving a uniform RGB light mixing effect.

[0011] The light-emitting device of this application can effectively reduce the need for independent RGB LED chips. By configuring the green light chip independently, it avoids the waste problem of the green light chip being too efficient and often requiring power reduction in traditional RGB packaging. This not only ensures the color uniformity and richness of the light output from the light guide plate, but also reduces the overall cost of the LED chips and improves the utilization rate of green light.

[0012] According to some embodiments of this application, the light guide has a first surface, a second surface, and a third surface, the second surface is disposed opposite to the first surface, the first surface is disposed close to the side surface of the light guide plate, and the second surface is provided with a first reflective texture unit;

[0013] The green light emitting component includes at least one green light emitting element, which is disposed facing the third surface; the green light emitting element is configured to emit green light, which enters the light guide from the third surface and is totally internally reflected in the light guide, and is then reflected by the first reflective texture unit at a preset angle to the first surface, and then emitted from the first surface and enters the light guide plate;

[0014] The red and blue light emitting component includes multiple red and blue light emitting parts, which face the first reflective texture unit. The red and blue light emitting parts are configured to emit red and blue light, which enter the light guide from the second surface and are totally internally reflected in the light guide. After being directed at the first surface at a preset angle, they are emitted from the first surface and enter the light guide plate.

[0015] According to some embodiments of this application, the light guide is provided with a fourth surface opposite to the third surface, and the green light emitting component includes two green light emitting parts, which are respectively disposed on the third surface and the fourth surface.

[0016] According to some embodiments of this application, the light guide plate is provided with a second reflective texture unit, and the composite light leaves the light guide plate through the reflection of the second reflective texture unit.

[0017] According to some embodiments of this application, the first reflective texture unit is configured as a serrated shape.

[0018] According to some embodiments of this application, the second reflective texture unit is provided with a plurality of protrusions.

[0019] According to some embodiments of this application, the green light emitting component further includes at least a first control board, and the green light emitting components are configured in a one-to-one correspondence with the first control board.

[0020] According to some embodiments of this application, the red and blue light emitting component further includes a second control board, and a plurality of the red and blue light emitting components are connected to the second control board.

[0021] The control method for a light-emitting device according to a third aspect embodiment of this application, applied to the light-emitting device described in the above embodiments, includes the following steps:

[0022] The green light-emitting component is driven to emit green light into the light guide, so that the green light enters the light guide plate through the light guide;

[0023] The red and blue light-emitting components are driven to emit red and blue light into the light guide, so that the red and blue light enter the light guide plate through the light guide;

[0024] The driving power of the green light-emitting component and the red and blue light-emitting components is controlled to enable the light guide plate to output composite light of a preset color.

[0025] A lamp according to a third aspect of this application includes the light-emitting device described in the above embodiments. Attached Figure Description

[0026] The present application will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0027] Figure 1 This is a schematic diagram of the structure of a light-emitting device according to an embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the structure of a light-emitting device according to another embodiment of this application;

[0029] Figure 3 for Figure 2 Another structural diagram;

[0030] Figure 4 for Figure 1 An enlarged schematic diagram of part I;

[0031] Figure 5 for Figure 3 A cross-sectional view of plane AA.

[0032] Figure label:

[0033] Light guide plate 1; second reflective texture unit 11; protrusion 111;

[0034] Light guide 2; light-emitting surface 21; first surface 211; second surface 22; third surface 23; fourth surface 24; first reflective texture unit 25;

[0035] Green light-emitting component 3; Green light-emitting part 31; First control board 32;

[0036] Red and blue light emitting component 4; red and blue light emitting part 41; second control board 42. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0038] In the description of this application, it should be understood that the use of terms such as "center," "middle," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings and is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] The following reference Figures 1 to 5 This application describes the light-emitting device and its control method, as well as the lamp, in the embodiments of this application.

[0041] according to Figures 1 to 5As shown, an embodiment of the light-emitting device of this application includes a light guide plate 1, a light guide 2, a green light-emitting component 3, and a red and blue light-emitting component 4. The light guide plate 1 serves as the light-emitting side of the device, used to diffuse and mix the light beam entering the light guide plate 1 before uniformly outputting it. The light guide 2 is arranged on the side of the light guide plate 1, with its light-emitting surface 21 facing the light guide plate 1, used to guide the light beam entering the light guide plate 1. The output end of the green light-emitting component 3 faces the light guide 2, used to emit green light into the light guide 2. After entering the light guide 2, the green light undergoes total internal reflection and finally enters the light guide plate 1 through the light-emitting surface 21 of the light guide 2. The output end of the red and blue light-emitting component 4 faces the light guide 2, used to simultaneously emit red and blue light into the light guide 2. After entering the light guide 2, the red and blue light couple and mix with the green light emitted from the green light-emitting component 3 inside the light guide 2 to form composite light. The composite light then enters the light guide plate 1 together through the light-emitting surface 21 of the light guide 2.

[0042] During the operation of the light-emitting device, the red and blue light emitted by the red and blue light-emitting component 4, along with the green light emitted by the green light-emitting component 3, simultaneously enter the light guide 2. Inside the light guide 2, they undergo total internal reflection and propagation to mix and form composite light. The composite light enters the light guide plate 1 through the light-emitting surface 21 of the light guide 2, where it is further diffused and homogenized, ultimately achieving a uniform RGB light mixing effect.

[0043] The light-emitting device of this application can effectively reduce the need for independent RGB LEDs and configure the green light chip independently. This avoids the waste problem of the green light chip being too efficient in traditional RGB packaging and often requiring reduced power. It not only ensures the color uniformity and richness of the light output from the light guide plate 1, but also reduces the overall cost of the light-emitting component and improves the utilization rate of green light.

[0044] according to Figures 1 to 5 As shown, in one embodiment of this application, the light guide 2 has a first surface 211, a second surface 22, and a third surface 23. The second surface 22 is disposed opposite to the first surface 211. The first surface 211 and the second surface 22 of the light guide 2 are long surfaces, and the third surface 23 is a short surface. The first surface 211 is the light-emitting side of the light guide 2. The first surface 211 is disposed adjacent to the side surface of the light guide plate 1. The first surface 211 of the light guide 2 is disposed face-to-face with the side surface of the light guide plate 1, so that the light guide 2 can directly inject the internally mixed composite light into the light guide plate 1. The second surface 22 of the light guide 2 is provided with a first reflective texture unit 25.

[0045] The green light-emitting component 3 includes at least one green light-emitting element 31, which is disposed facing the third surface 23 of the light guide 2. The red and blue light-emitting component 4 includes a plurality of red and blue light-emitting elements 41, which are evenly spaced and disposed on the second surface 22 of the light guide 2, and are all disposed facing the first reflective texture unit 25 (i.e., the second surface 22 of the light guide 2).

[0046] During operation, the green light-emitting component 31 emits green light, which enters the light guide 2 from the third surface 23. The green light undergoes total internal reflection and propagation within the light guide 2, and is then reflected at a preset angle by the first reflective texture unit 25 to the first surface 211. Subsequently, it exits from the first surface 211 and enters the light guide plate 1. Simultaneously, the red and blue light-emitting component 41 emits red and blue light, which enter the light guide 2 from the second surface 22. Some of the red and blue light directly strikes the first surface 211 and exits into the light guide plate 1. Some of the red and blue light undergoes total internal reflection within the light guide 2, and is then reflected at a preset angle by the first reflective texture unit 25 to the first surface 211. The preset angle can be set according to actual needs.

[0047] The light-emitting device of this application has multiple red and blue light-emitting components 41 arranged on the long surface (second surface 22) of the light guide 2, and a very small number of green light-emitting components 31 arranged on the short surface of the light guide 2. Under the same power, green light, red light and blue light are injected into the light guide 2 from different light-emitting components and different directions. After passing through the first reflective texture unit 25, they are injected vertically into the light guide plate 1 from the first surface 211 of the light guide 2. This ensures that the coupling positions of the three colors are consistent when they enter the light guide plate 1, and they can be fully mixed inside the light guide plate 1 to form a composite light output with uniform brightness and pure color, which effectively improves the uniformity of color mixing. At the same time, it avoids the waste problem of excessively high efficiency of green light chip in traditional RGB packaging, which requires reduced power use, and improves the utilization rate of green light.

[0048] In some embodiments, the preset angle can be set to 90 degrees. Green light enters the light guide 2 from the third surface 23, undergoes total internal reflection and propagation within the light guide 2, and is then reflected at a 90-degree angle by the first reflective texture unit 25 to the first surface 211. Subsequently, the green light exits vertically from the first surface 211 of the light guide 2 and enters the light guide plate 1. Simultaneously, red and blue light enter the light guide 2 from the second surface 22. Some of the red and blue light directly and vertically strikes the first surface 211 of the light guide 2 and exits vertically into the light guide plate 1. Some of the red and blue light undergoes total internal reflection within the light guide 2, and is then reflected at a 90-degree angle by the first reflective texture unit 25 to the first surface 211. Subsequently, it exits vertically from the first surface 211 of the light guide 2 and enters the light guide plate 1. In other embodiments, by expanding the range of the preset angle, the composite light can enter the light guide plate 1 at a larger angle.

[0049] according to Figures 1 to 3As shown, in one embodiment of this application, the light guide 2 is provided with a fourth surface 24 opposite to the third surface 23, and the green light emitting component 3 includes two green light emitting parts 31. The two green light emitting parts 31 are respectively disposed on the third surface 23 and the fourth surface 24, and the output ends of the two green light emitting parts 31 are respectively facing the third surface 23 and the fourth surface 24 of the light guide 2.

[0050] During operation, the green light emitted by the green light-emitting component 31 in the third direction 23 enters the light guide 2 through the third surface 23, while the green light emitted by the green light-emitting component 31 in the fourth direction 24 enters the light guide 2 through the fourth surface 24. The green light from the two different directions superimposes and diffuses as it propagates inside the light guide 2, resulting in a more uniform green light distribution within the light guide 2. The green light emitted by the two green light-emitting components 31 converges inside the light guide 2, undergoes total internal reflection and transmission within the light guide 2, and then enters the light guide plate 1 through the light-emitting surface 21 of the light guide 2.

[0051] Injecting green light into the two opposite surfaces of the light guide 2 can significantly increase the luminous flux of green light into the light guide 2, reduce the brightness unevenness caused by a single injection direction, and enable a more uniform and stable green light distribution inside the light guide plate 1. This provides a good optical basis for subsequent mixing with red and blue light, and significantly improves the uniformity and brightness consistency of the composite light.

[0052] In some embodiments, such as Figures 1 to 3 As shown, there are 12 red and blue light-emitting components.

[0053] according to Figures 1 to 4 As shown, in one embodiment of this application, the first reflective texture unit 25 is configured as a sawtooth shape and has multiple light guide teeth to change the propagation path of the light beam in the light guide 2. The sawtooth-shaped first reflective texture unit 25 can ensure that the light beam emission direction is stable and vertical, avoid stray light, and make the light beam emit vertically from the first surface 211.

[0054] In other embodiments, the first reflective texture unit 25 may also be configured as a plurality of protrusions (not shown); the protrusions may be continuous or discontinuous. In some embodiments, the protrusions are configured as arc-shaped protrusions.

[0055] In other instances, the first reflective texture unit 25 may also be configured as a plurality of recesses (not shown), which may be continuous or discontinuous. In some embodiments, the recesses are configured as arc-shaped recesses.

[0056] according to Figures 1 to 5As shown, in one embodiment of this application, the light guide plate 1 is provided with a second reflective texture unit 11, which is used to perform total internal reflection on the composite light entering the light guide plate 1. After reflection and guidance, the composite light leaves the light guide plate 1 at a preset angle through the reflection of the second reflective texture unit 11.

[0057] During operation, the composite light enters the light guide plate 1 through the light-emitting surface 21 of the light guide 2 and propagates and diffuses within the light guide plate 1. When some light rays travel towards the back of the light guide plate 1, they are totally internally reflected to the second reflective texture unit 11. The light rays are reflected by the second reflective texture unit 11, changing their propagation direction and redirecting the light beam to the front light-emitting side of the light guide plate 1, thereby avoiding beam loss. The second reflective texture unit 11 not only improves the light extraction efficiency of the composite light but also makes the light output of the light guide plate 1 more uniform, reducing dark areas and bright spots.

[0058] In one embodiment of this application, the second reflective texture unit 11 is provided with a plurality of protrusions 111. The composite light entering the light guide plate 1 can be reflected or totally reflected by the surface of the protrusions 111 during propagation, thereby being uniformly emitted from the light-emitting side of the light guide plate 1. In some embodiments, the protrusions 111 are configured as arc-shaped protrusions 111.

[0059] In some other embodiments, the second reflective texture unit 11 has a plurality of recesses (not shown), which may be continuous or discontinuous. In some embodiments, the recesses are arc-shaped.

[0060] according to Figure 2 and Figure 3 As shown, in one embodiment of this application, the green light emitting component 3 further includes at least a first control board 32, and the green light emitting components 31 are correspondingly and fixedly connected to the first control board 32, with each green light emitting component 31 forming an independent electrical connection with a first control board 32.

[0061] In some embodiments, the green light-emitting component 3 includes two green light-emitting elements 31 and two first control boards 32, with the green light-emitting elements 31 and the first control boards 32 arranged in a one-to-one correspondence.

[0062] according to Figure 2 , Figure 3 and Figure 5 As shown, in one embodiment of this application, the red and blue light emitting component 4 further includes a second control board 42, and a plurality of red and blue light emitting components 41 are fixedly connected to the second control board 42.

[0063] In some embodiments, both the first control board 32 and the second control board 42 can be configured as PCB control boards.

[0064] according to Figures 1 to 5As shown, the control method for the light-emitting device according to the second aspect of this application is applied to the light-emitting device of the above embodiment. The control method includes the following steps:

[0065] The green light-emitting component 3 is driven to work, causing it to emit green light into the light guide 2. After entering the light guide 2, the green light enters the light guide plate 1 through total internal reflection and propagation.

[0066] The red and blue light-emitting component 4 is driven to work, so that it emits red and blue light into the light guide 2. The red and blue light enter the light guide plate 1 through the light guide 2.

[0067] The driving power of the green light-emitting component 3 and the red and blue light-emitting components 4 are controlled respectively, and the brightness of the three colors of light is adjusted according to the preset comparison relationship, so as to realize the output of composite light of preset colors by the light guide plate 1.

[0068] The following is one specific embodiment of the light-emitting device control method of this application:

[0069] When the light-emitting device is activated, the first control board 32 supplies power to the corresponding green light-emitting component 31, causing it to light up according to the preset current and emit green light; the second control board 42 simultaneously drives multiple red and blue light-emitting components 41, and adjusts the working state of the red light chip and the blue light chip according to the control signal to emit red light and blue light.

[0070] The green light emitting component 31 faces the third surface 23 and / or the fourth surface 24 of the light guide 2, and the emitted green light enters the light guide 2 through the third surface 23 and / or the fourth surface 24; the red and blue light emitting component 41 faces the second surface 22 of the light guide 2, and the red and blue light enter the light guide 2 through the second surface 22.

[0071] The green light entering the light guide 2 undergoes total internal reflection and propagates inside. After encountering the first reflective texture unit 25 on the second surface 22, it is vertically guided to the first surface 211 of the light guide 2. The red and blue light, after entering the light guide 2, also propagate inside the light guide 2, either directly passing through the light guide 2 or interacting with the first reflective texture unit 25 and then being reflected to the first surface 211 of the light guide 2.

[0072] The green light from the green light-emitting component 31, along with the red and blue light from the red and blue light-emitting component 41, couples and superimposes within the light guide 2 to form an RGB composite light. All light rays are emitted uniformly from the first surface 211 of the light guide 2 and enter the light guide 2 from the side of the light guide plate 1.

[0073] After the composite light enters the light guide plate 1, it is propagated by total internal reflection inside the light guide plate 1. After total internal reflection through the second reflective texture unit 11, the composite light is output vertically from the light guide plate 1.

[0074] Adjust the driving power of the green light-emitting component 3 and the red and blue light-emitting component 4 respectively, and the light guide plate 1 will continuously output the desired preset color composite light.

[0075] The lamp of the third aspect of this application includes the light-emitting device of the above embodiments.

[0076] In some embodiments of this application, the light-emitting device and / or lamp of this application are applied in the automotive field; specifically, in automotive ambient lighting.

[0077] The light-emitting device of this application first separates the green light chip from the traditional RGB LED beads to form an independent green light-emitting component 3. This avoids the waste of green light being forced to operate at reduced power in the RGB three-in-one chip. It solves the problem of complex packaging and high chip cost of the RGB three-in-one chip, while the green light chip is not fully utilized, which aggravates unnecessary cost waste. The red light chip and blue light chip are combined into a dual-color light source, which reduces the number of redundant green light chips, reduces packaging complexity and material usage, and significantly reduces the cost of chips and LED beads from the source. At the same time, it also improves the utilization rate of independent green light and improves the overall light energy conversion efficiency. Secondly, the multi-faceted structure of the light guide 2 (first face 211, second face 22, third face 23, fourth face 24) in conjunction with the first reflective texture unit 25 allows multiple red and blue light emitting components 41 and a very small number of green light emitting components 31 to emit red, blue and green light into the light guide 2 from different directions. After being totally reflected in the light guide 2, the light is uniformly guided to the light guide plate 1 by the first reflective texture unit 25. Finally, the light is further dispersed inside the light guide plate 1 by the second reflective texture unit 11 of the protrusion 111, so that the light output is uniform and without bright spots.

[0078] In the description of this specification, the use of terms such as "an embodiment," "some examples," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples" indicates that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] The embodiments of this application have been described in detail above with reference to the accompanying drawings. However, this application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this application.

Claims

1. A light emitting device, characterized by: The light-emitting device is an LED light-emitting device, and the light-emitting device comprises a light guide plate; a light guide, an out-light surface of the light guide faces the light guide plate, the light guide is provided with a first surface, a second surface and a third surface, the first surface is the out-light surface, the second surface is oppositely arranged with the first surface, the first surface is arranged adjacent to a side surface of the light guide plate, the second surface is provided with a first reflection texture unit; the length of the first surface and the second surface is set as a first length, the length of the third surface is set as a second length, the first length is greater than the second length; a green light-emitting assembly, the green light-emitting assembly is used for emitting green light to the light guide, the green light-emitting assembly comprises at least one green light-emitting component, the green light-emitting component is arranged towards the third surface; the green light-emitting component is configured to emit green light, the green light enters the light guide from the third surface and is totally reflected in the light guide, and then is reflected to the first surface at a preset angle through the first reflection texture unit, and then is emitted from the first surface and enters the light guide plate; a red and blue light-emitting assembly, the red and blue light-emitting assembly is used for emitting red light and blue light to the light guide, the red and blue light-emitting assembly comprises a plurality of red and blue light-emitting components, the red and blue light-emitting component is arranged towards the first reflection texture unit; the red and blue light-emitting component is configured to emit red light and blue light, the red light and the blue light enter the light guide from the second surface and are totally reflected in the light guide, and then are emitted from the first surface after being emitted to the first surface at a preset angle, and then enter the light guide plate, so that the red light, the blue light and the green light form composite light after being mixed in the light guide, and the composite light enters the light guide plate through the out-light surface of the light guide.

2. The light emitting device of claim 1, wherein: The light guide is provided with a fourth surface opposite to the third surface, the green light-emitting assembly comprises two green light-emitting components, and the two green light-emitting components are arranged on the third surface and the fourth surface respectively.

3. The light emitting device of claim 1, wherein: The light guide plate is provided with a second reflection texture unit, and the composite light exits the light guide plate through the reflection of the second reflection texture unit.

4. The light emitting device of claim 1, wherein: The first reflection texture unit is arranged in a sawtooth shape.

5. The light emitting device of claim 3, wherein: The second reflection texture unit is provided with a plurality of convex parts.

6. The light emitting device of claim 1, wherein: The green light-emitting assembly further comprises at least a first control plate, and the green light-emitting component is arranged in one-to-one correspondence with the first control plate.

7. The light emitting device of claim 1, wherein: The red and blue light-emitting assembly further comprises a second control plate, and the plurality of red and blue light-emitting components are connected with the second control plate.

8. A control method of a light emitting device, characterized by, The control method is applied to the light-emitting device of any one of claims 1 to 7, and the control method comprises the steps of: driving the green light-emitting assembly to emit green light to the light guide, so that the green light enters the light guide plate through the light guide; driving the red and blue light-emitting assembly to emit red light and blue light to the light guide, so that the red light and the blue light enter the light guide plate through the light guide; controlling the driving power of the green light-emitting assembly and the red and blue light-emitting assembly, so as to realize the output of the composite light of a preset color by the light guide plate.

9. A lamp characterized by: The light-emitting device of any one of claims 1 to 7.

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