Light emitting device

Abstract

A light-emitting device comprises a substrate, a plurality of light-emitting elements and a plurality of fluorescent modules. The light-emitting elements are arranged on the substrate in an array form and are electrically connected with the substrate. The fluorescent modules are arranged on the substrate and cover the light-emitting elements. The fluorescent modules comprise a first fluorescent module and a second fluorescent module. The first fluorescent module and the second fluorescent module are different in color. The first fluorescent module is adjacent to the second fluorescent module, and the interface between the first fluorescent module and the second fluorescent module is light-permeable.

Description

Technical Field

[0001] The invention relates to a light emitting device. Background Art

[0002] In the prior art of manufacturing light emitting diode devices, in order to achieve the preset brightness and color temperature requirements, a dimmer and a variable resistor for multi-stage brightness control of the light emitting diode need to be disposed on the substrate, resulting in high manufacturing costs. Summary of the invention

[0003] The present invention provides a light emitting device with low manufacturing cost and capable of achieving preset brightness and color temperature requirements.

[0004] According to one embodiment of the present invention, a light-emitting device is provided, comprising a substrate, a plurality of light-emitting elements, and a plurality of fluorescent modules. The light-emitting elements are arranged on the substrate in an array form and are electrically connected to the substrate. The fluorescent modules are arranged on the substrate and cover the light-emitting elements. The fluorescent modules include a first fluorescent module and a second fluorescent module. The first fluorescent module and the second fluorescent module have different colors. The first fluorescent module is adjacent to the second fluorescent module, and the interface between the first fluorescent module and the second fluorescent module is light-transmissive.

[0005] Based on the above, the light-emitting device provided in the embodiment of the present invention is equipped with a plurality of fluorescent modules of different colors, and the fluorescent modules are used to cover a plurality of light-emitting elements. By designing the emission wavelengths of the light-emitting elements and the colors of each fluorescent module, the preset brightness and color temperature requirements can be achieved. Based on the above design, the brightness difference of the light-emitting elements can be less than or equal to 5%, the color temperature difference can be less than or equal to 5%, and / or the output power difference can be less than or equal to 5%. In other words, a dimmer and a variable resistor for multi-stage brightness control of the light-emitting elements can be omitted on the substrate, which greatly reduces the manufacturing cost of the light-emitting device.

[0006] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1A as well as Figure 1B A schematic diagram showing a light emitting device according to some embodiments of the present invention;

[0008] Figure 2A as well as Figure 2B A schematic diagram showing a light emitting device according to some embodiments of the present invention;

[0009] Figure 3 Schematic diagram showing a light emitting device according to some embodiments of the present invention.

[0010] Description of Figure Numbers:

[0011] 1, 2, 3: light emitting device;

[0012] 10:Substrate;

[0013] 100, 101, 102, 103, 300: light emitting element;

[0014] 201, 202, 203, 204, 205, 206, 207, 208, 209: Fluorescence module DETAILED DESCRIPTION

[0015] Reference Figure 1A as well as Figure 1B , which shows a schematic diagram of a light emitting device according to some embodiments of the present invention.

[0016] The light emitting device 1 includes a substrate 10, a plurality of light emitting elements 100, and a plurality of fluorescent modules 201, 202, 203 arranged in sequence along the X direction. The light emitting elements 100 may be, for example, light emitting diodes, and are arranged on the substrate 10 in an array form and electrically connected to the substrate 10. The fluorescent modules 201, 202, 203 are arranged on the substrate 10 and cover the light emitting elements 100. The fluorescent modules 201, 202, 203 have different colors. The interface between the fluorescent modules 201, 202 is light-transmissive, and the interface between the fluorescent modules 202, 203 is light-transmissive.

[0017] exist Figure 1A as well as Figure 1B In the light emitting device 1 shown, at least one light emitting element 100 is disposed on the interface between the fluorescent modules 201 and 202, and at least one light emitting element 100 is disposed on the interface between the fluorescent modules 202 and 203, but the present invention is not limited thereto. Light from the light emitting elements 100 will penetrate the corresponding fluorescent modules. By designing the emission wavelengths of the light emitting elements 100 and the colors of the fluorescent modules 201, 202, and 203, the preset brightness and color temperature requirements can be achieved.

[0018] In some embodiments, the substrate 10 of the light-emitting device 1 may not have the function of adjusting the output power. In addition, the brightness difference of the light-emitting elements 100 may be less than or equal to 5%, the color temperature difference may be less than or equal to 5%, and / or the output power difference may be less than or equal to 10%. By providing fluorescent modules 201, 202, 203 of different colors in the light-emitting device 1, the preset brightness requirements and color temperature requirements can be achieved without performing multi-stage brightness adjustment on the light-emitting elements 100. Compared with the situation in a comparative example where multi-stage brightness adjustment is required for the light-emitting elements 100, the light-emitting device 1 provided by the present invention may not be provided with a dimmer and a variable resistor on the substrate 10. The design of the substrate 10 is simple, which greatly reduces the manufacturing cost of the light-emitting device 1.

[0019] exist Figure 1A as well as Figure 1B In the embodiment shown, the thickness of the fluorescent modules 201, 202, 203 in the normal direction (Z direction) of the substrate 10 is different. By adjusting the thickness of the fluorescent modules 201, 202, 203, the color temperature of the light from the light-emitting elements 100 and penetrating the fluorescent modules 201, 202, 203 can be changed. However, the present invention is not limited thereto, and in some embodiments, the thickness of the fluorescent modules 201, 202, 203 in the normal direction (Z direction) of the substrate 10 can be the same.

[0020] exist Figure 1A as well as Figure 1B In the illustrated embodiment, the top surfaces 201T, 202T, 203T of the fluorescent modules 201, 202, 203 facing away from the substrate 10 are all flat surfaces. However, the present invention is not limited thereto, and in some embodiments, at least one of the top surfaces 201T, 202T, 203T may be a curved surface.

[0021] exist Figure 1A as well as Figure 1B In the illustrated embodiment, the top surfaces 201T, 202T, 203T of the fluorescent modules 201, 202, 203 facing away from the substrate 10 are parallel to each other. However, the present invention is not limited thereto, and in some embodiments, at least one of the top surfaces 201T, 202T, 203T may be inclined relative to the other top surfaces (i.e., at least one of the top surfaces 201T, 202T, 203T may not be parallel to the other top surfaces).

[0022] In order to fully illustrate the various embodiments of the present invention, other embodiments of the present invention will be described below. It must be noted that the following embodiments use the component numbers and some contents of the previous embodiments, wherein the same numbers are used to represent the same or similar components, and the description of the same technical contents is omitted. For the description of the omitted parts, please refer to the previous embodiments, and the following embodiments will not be repeated.

[0023] Reference Figure 2A as well as Figure 2B , which shows a schematic diagram of a light emitting device according to some embodiments of the present invention.

[0024] The light emitting device 2 includes a substrate 10, a plurality of light emitting elements 101, 102, 103, and a plurality of fluorescent modules 201, 202, 203 arranged in sequence along the X direction. The light emitting elements 101, 102, 103 are arranged on the substrate 10 in an array form and are electrically connected to the substrate 10. The fluorescent modules 201, 202, 203 are arranged on the substrate 10 and cover the light emitting elements 101, 102, 103. The fluorescent modules 201, 202, 203 have different colors. The interface between the fluorescent modules 201, 202 is light-transmissive, and the interface between the fluorescent modules 202, 203 is light-transmissive.

[0025] exist Figure 2A as well as Figure 2B In the light emitting device 2 shown, the fluorescent module 201 completely covers the light emitting element 101, the fluorescent module 202 completely covers the light emitting element 102, and the fluorescent module 203 completely covers the light emitting element 103. Light from the light emitting elements 101, 102, 103 will penetrate the corresponding fluorescent modules. By designing the emission wavelengths of the light emitting elements 101, 102, 103 and the colors of the fluorescent modules 201, 202, 203, the preset brightness and color temperature requirements can be achieved.

[0026] In some embodiments, the substrate 10 of the light-emitting device 2 may not have the function of adjusting the output power. In addition, the brightness difference of the light-emitting elements 101, 102, 103 may be less than or equal to 5%, the color temperature difference may be less than or equal to 5%, and / or the output power difference may be less than or equal to 10%. By providing fluorescent modules 201, 202, 203 of different colors in the light-emitting device 2, the preset brightness requirements and color temperature requirements can be achieved without performing multi-stage brightness adjustment on the light-emitting elements 101, 102, 103. Compared with the situation in a comparative example where multi-stage brightness adjustment is required on the light-emitting elements 101, 102, 103, the light-emitting device 2 provided by the present invention may not be provided with a dimmer and a variable resistor on the substrate 10. The design of the substrate 10 is simple, which greatly reduces the manufacturing cost of the light-emitting device 2.

[0027] exist Figure 2A as well as Figure 2BIn the embodiment shown, the thickness of the fluorescent modules 201, 202, 203 in the normal direction (Z direction) of the substrate 10 is different. By adjusting the thickness of the fluorescent modules 201, 202, 203, the color temperature of the light from the light emitting elements 101, 102, 103 and penetrating the fluorescent modules 201, 202, 203 can be changed. However, the present invention is not limited thereto, and in some embodiments, the thickness of the fluorescent modules 201, 202, 203 in the normal direction (Z direction) of the substrate 10 can be the same.

[0028] exist Figure 2A as well as Figure 2B In the illustrated embodiment, the top surfaces 201T, 202T, 203T of the fluorescent modules 201, 202, 203 facing away from the substrate 10 are all flat surfaces. However, the present invention is not limited thereto, and in some embodiments, at least one of the top surfaces 201T, 202T, 203T may be a curved surface.

[0029] exist Figure 2A as well as Figure 2B In the illustrated embodiment, the top surfaces 201T, 202T, 203T of the fluorescent modules 201, 202, 203 facing away from the substrate 10 are parallel to each other. However, the present invention is not limited thereto, and in some embodiments, at least one of the top surfaces 201T, 202T, 203T may be inclined relative to the other top surfaces (i.e., at least one of the top surfaces 201T, 202T, 203T may not be parallel to the other top surfaces).

[0030] Reference Figure 3 , which shows a schematic diagram of a light emitting device according to some embodiments of the present invention.

[0031] The light emitting device 3 includes a substrate 10, a plurality of light emitting elements 300, and a plurality of fluorescent modules 201, 202, 203, 204, 205, 206, 207, 208, 209. The light emitting elements 300 are arranged on the substrate 10 in an array form and are electrically connected to the substrate 10. The fluorescent modules 201, 202, 203, 204, 205, 206, 207, 208, 209 are arranged on the substrate 10 and cover the light emitting elements 300. The fluorescent modules 201, 202, 203, 204, 205, 206, 207, 208, 209 have different colors. The interface between two adjacent fluorescent modules is light-transmissive.

[0032] exist Figure 3In the light emitting device 3 shown, any one of the fluorescent modules 201, 202, 203, 204, 205, 206, 207, 208, 209 at least completely covers one light emitting element 300. Light from the light emitting elements 300 will penetrate the corresponding fluorescent module. By designing the emission wavelengths of the light emitting elements 300 and the colors of the fluorescent modules 201, 202, 203, 204, 205, 206, 207, 208, 209, the preset brightness and color temperature requirements can be achieved.

[0033] In some embodiments, the substrate 10 of the light-emitting device 3 may not have the function of adjusting the output power. In addition, the brightness difference of the light-emitting elements 300 may be less than or equal to 5%, the color temperature difference may be less than or equal to 5%, and / or the output power difference may be less than or equal to 10%. By arranging fluorescent modules 201, 202, 203, 204, 205, 206, 207, 208, 209 of different colors in the light-emitting device 3, the preset brightness requirements and color temperature requirements can be achieved without performing multi-stage brightness adjustment on the light-emitting elements 300. Compared with the situation in a comparative example where the light-emitting elements 300 need to be multi-staged brightness adjusted, the light-emitting device 3 provided by the present invention may not be provided with a dimmer and a variable resistor on the substrate 10. The design of the substrate 10 is simple, which greatly reduces the manufacturing cost of the light-emitting device 3.

[0034] Based on the above, the light-emitting device provided in the embodiment of the present invention is equipped with a plurality of fluorescent modules of different colors, and a plurality of light-emitting elements are covered with the fluorescent modules. By designing the emission wavelengths of the light-emitting elements and the colors of each fluorescent module, the preset brightness and color temperature requirements can be achieved. Based on the above design, the brightness difference of the light-emitting elements can be less than or equal to 5%, the color temperature difference can be less than or equal to 5%, and / or the output power difference can be less than or equal to 10%. In other words, a dimmer and a variable resistor for multi-stage brightness control of the light-emitting elements can be omitted on the substrate, which greatly reduces the manufacturing cost of the light-emitting device.

Claims

1. A light emitting device, characterized in that: include: substrate; A plurality of light emitting elements are arranged on the substrate in an array and electrically connected to the substrate; as well as A plurality of fluorescent modules are arranged on the substrate and cover the plurality of light-emitting elements. The plurality of fluorescent modules include a first fluorescent module and a second fluorescent module. The first fluorescent module and the second fluorescent module have different colors. The first fluorescent module is adjacent to the second fluorescent module, and an interface between the first fluorescent module and the second fluorescent module is light-transmissive.

2. The light emitting device according to claim 1, characterized in that: The plurality of light-emitting elements include a first light-emitting element and a second light-emitting element. The first fluorescent module completely covers the first light-emitting element, and the second fluorescent module completely covers the second light-emitting element.

3. The light emitting device according to claim 2, characterized in that: The first fluorescent module and the second fluorescent module have different thicknesses in a normal direction of the substrate.

4. The light emitting device according to claim 2, characterized in that: The first fluorescent module includes a first top surface, the second fluorescent module includes a second top surface, and the first top surface is not parallel to the second top surface.

5. The light emitting device according to claim 2, characterized in that: The first fluorescent module includes a first top surface, the second fluorescent module includes a second top surface, and at least one of the first top surface and the second top surface is a curved surface.

6. The light emitting device according to claim 1, characterized in that: At least one of the plurality of light emitting elements is disposed corresponding to the interface between the first fluorescent module and the second fluorescent module.

7. The light emitting device according to claim 6, characterized in that: The first fluorescent module and the second fluorescent module have different thicknesses in a normal direction of the substrate.

8. The light emitting device according to claim 6, characterized in that: The first fluorescent module includes a first top surface, the second fluorescent module includes a second top surface, and the first top surface is not parallel to the second top surface.

9. The light emitting device according to claim 6, characterized in that: The first fluorescent module includes a first top surface, the second fluorescent module includes a second top surface, and at least one of the first top surface and the second top surface is a curved surface.

10. The light emitting device according to claim 1, characterized in that: The plurality of fluorescent modules further include a third fluorescent module. The second fluorescent module is adjacent to the third fluorescent module. The second fluorescent module and the third fluorescent module have different colors. An interface between the second fluorescent module and the third fluorescent module is light-transmissive.

11. The light emitting device according to claim 10, characterized in that: The first fluorescent module, the second fluorescent module and the third fluorescent module are sequentially arranged along a direction.

12. The light emitting device according to claim 1, characterized in that: A brightness difference among the plurality of light emitting elements is less than or equal to 5%.

13. The light emitting device according to claim 1, characterized in that: The color temperature difference of the multiple light-emitting elements is less than or equal to 5%.

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