Light emitting device

Abstract

The utility model discloses a light emitting device, light emitting device includes the carrier plate and is located on the carrier plate a plurality of light emitting module, light emitting module includes the substrate and is located on the substrate a plurality of LED chip, and the LED chip in different light emitting module is mutually connected and forms LED lamp string. The utility model through simple and effective framework design has realized the LED chip in light emitting device divides several ways and conducts respectively, has simplified the drive scheme and control system.

Description

Technical Field

[0001] This utility model belongs to the field of semiconductor technology, specifically relating to a light-emitting device. Background Technology

[0002] LED light sources are currently the most widely used light-emitting devices and a technological solution for achieving pixelated light sources. They are widely used in display screens, automotive headlights, and other light-emitting devices. Currently, with the further development of LED chips, people's demands for lighting effects are constantly increasing. By fabricating light-emitting devices that mimic natural light effects such as "blue sky and white clouds," it is possible to achieve effects similar to outdoor lighting.

[0003] In existing technologies, light-emitting devices are made by assembling arrays of multi-color LED (RGB three primary colors) chips. The control system individually controls each LED chip or a region of LED chips, adjusting the color and brightness of each LED chip or region of LED chips, ultimately achieving an effect similar to "blue sky and white clouds" that mimics natural light.

[0004] However, existing light-emitting devices have the following disadvantages: (1) The saturation of RGB LED chips is very high, which makes the user's comfort poor when used for lighting; (2) To achieve individual and precise positioning control of each LED chip or each area, the cost of the driving scheme and control system is relatively high.

[0005] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a light-emitting device. Utility Model Content

[0006] The purpose of this invention is to provide a light-emitting device that can achieve a realistic natural light illumination effect through a simple and effective architectural design.

[0007] To achieve the above objectives, the technical solution provided by an embodiment of this utility model is as follows:

[0008] A light-emitting device includes a carrier plate and a plurality of light-emitting modules located on the carrier plate. Each light-emitting module includes a substrate and a plurality of LED chips located on the substrate. The LED chips in different light-emitting modules are connected in series to form an LED string.

[0009] In one embodiment, the light-emitting module array is distributed on the carrier plate.

[0010] In one embodiment, each of the light-emitting modules includes at least a first LED chip, a second LED chip, and a third LED chip that are independent of each other.

[0011] In one embodiment, the light-emitting device comprises at least a first LED string, a second LED string, and a third LED string. The first LED string is composed of first LED chips connected in series in each light-emitting module. The second LED string is composed of a portion of first LED chips and a portion of second LED chips connected in series. The third LED string is composed of a portion of second LED chips and a portion of third LED chips connected in series.

[0012] In one embodiment, the carrier plate includes a first region and a second region that are separated from each other, wherein a first LED chip in the first region and a second LED chip in the second region are connected in series to form a second LED string, and the first region is located at a corner of the carrier plate.

[0013] In one embodiment, the carrier board includes a third region and a fourth region that are separated from each other, wherein a second LED chip in the third region and a third LED chip in the fourth region are connected in series to form a third LED string.

[0014] In one embodiment, the light-emitting device includes:

[0015] In the first state, the first LED string is turned on;

[0016] In the second state, the second LED string is turned on;

[0017] In the third state, the third LED string is turned on.

[0018] In one embodiment, the first LED chip is a white LED chip, the second LED chip is a blue LED chip, and the third LED chip is an orange LED chip.

[0019] In one embodiment, the center color coordinates of the second LED chip are (0.16, 0.22), and the color coordinates of the second LED chip lie within a 7th-order McAdam ellipse surrounding the center color coordinates; and / or,

[0020] The center color coordinates of the third LED chip are (0.55, 0.42), and the color coordinates of the third LED chip are located within a 7th-order McAdam ellipse surrounding the center color coordinates.

[0021] In one embodiment, each of the light-emitting modules further includes a diffusion lens that corresponds to each of the LED chips.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] This invention places multiple independent LED chips on the same substrate to form a light-emitting module. By connecting the LED chips in different light-emitting modules in series, multiple LED strings are formed in the light-emitting device. This allows the LED chips in the light-emitting device to be turned on in several separate paths, eliminating the need to control a single LED chip or a specific area, which greatly simplifies the driving scheme and control system.

[0024] This invention achieves a natural light effect similar to "blue sky and white clouds" and "sunset and sunrise" by connecting LED chips in different light-emitting modules in series, which is convenient and effective. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the planar structure of the light-emitting device in Embodiment 1 of this utility model;

[0027] Figure 2 This is a schematic diagram of the light-emitting module in Embodiment 1 of this utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the light-emitting module in Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram showing the distribution of LED chips in the second LED string in Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram showing the distribution of LED chips in the third LED string in Embodiment 1 of this utility model.

[0031] Explanation of key figure labels:

[0032] 10-Carrier plate, 20-Light-emitting module, 21-Substrate, 221-First LED chip, 222-Second LED chip, 223-Third LED chip, 23-Diffuser lens. Detailed Implementation

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0034] The present utility model discloses a lighting device, including a carrier board and a plurality of lighting modules located on the carrier board. The lighting module includes a substrate and a plurality of LED chips located on the substrate. The LED chips in different lighting modules are connected in series with each other to form an LED lamp string.

[0035] The following further illustrates the present utility model with specific examples.

[0036] Embodiment 1:

[0037] Refer Figure 1 And in combination with Figure 2 As shown, the lighting device in this embodiment includes a carrier board 10 and a plurality of lighting modules 20 located on the carrier board 10. The lighting module 20 includes a substrate 21 and a plurality of LED chips located on the substrate 21. The LED chips in different lighting modules 20 are connected in series with each other to form an LED lamp string.

[0038] Among them, the lighting modules 20 are distributed in an array on the carrier board 10. Along the length direction of the carrier board 10, the lighting device has multiple rows of lighting modules 20 parallel to each other. Along the width direction of the carrier board 10, the lighting device has multiple columns of lighting modules 20 parallel to each other.

[0039] In combination with Figure 3 As shown, the lighting module in this embodiment includes independent first LED chip 221, second LED chip 222, and third LED chip 223. Each LED chip is provided with a diffusion lens 23 correspondingly. The light emitted by the LED chip is emitted to a diffusion plate (not shown) via the diffusion lens 23. After being homogenized by the diffusion plate, it is emitted to the usage space.

[0040] Specifically, the first LED chip 221 in this embodiment is a white light LED chip, the second LED chip is a blue light LED chip 222, and the third LED chip 223 is an orange light LED chip.

[0041] Among them, the blue LED chip and the orange LED chip are custom-made LED chips that can directly emit blue and orange light. The center color coordinates of the second LED chip 222 are (0.16, 0.22), and the color coordinates of the second LED chip 222 are located within a 7th-order McAdam ellipse around the center color coordinates; the center color coordinates of the third LED chip 223 are (0.55, 0.42), and the color coordinates of the third LED chip 223 are located within a 7th-order McAdam ellipse around the center color coordinates.

[0042] Furthermore, the light-emitting device in this embodiment forms a first LED string, a second LED string, and a third LED string. The first LED string is composed of first LED chips 221 in each light-emitting module 20 connected in series. The second LED string is composed of a portion of the first LED chips 221 and a portion of the second LED chips 222 connected in series. The third LED string is composed of a portion of the second LED chips 222 and a portion of the third LED chips 223 connected in series.

[0043] Each LED string is independent of the others, unaffected by interference, and can be turned on individually. Therefore, the light-emitting device in this embodiment includes three states (levels):

[0044] In the first state, the first LED string is turned on;

[0045] In the second state, the second LED string is turned on;

[0046] In the third state, the third LED string is turned on.

[0047] It is worth noting that in other embodiments, the light-emitting module may include more LED chips. By connecting three independent LED chips or more LED chips in series in the different light-emitting modules described above, any number of LED light strings can be formed. That is, the light-emitting device in this solution can have more levels.

[0048] Specifically, in this embodiment, when the first LED string is turned on, the light-emitting device presents a pure white light illumination effect to provide basic lighting; when the second LED string is turned on, the light-emitting device presents a natural light illumination effect similar to "blue sky and white clouds"; and when the third LED string is turned on, the light-emitting device presents a natural light illumination effect similar to "sunset and sunrise".

[0049] In order to achieve the second state, the carrier plate 10 is divided into a first region and a second region that are separated from each other. The first LED chip 221 in the first region and the second LED chip 222 in the second region are connected in series to form a second LED light string. The first region is located at the corner of the carrier plate.

[0050] Similarly, to achieve the third state, the carrier board 10 is divided into a mutually separated third region and a fourth region. The second LED chips 222 in the third region and the third LED chips 223 in the fourth region are connected in series to form a third LED light string.

[0051] More specifically, referring Figure 4 As shown, the light-emitting device in this embodiment includes 10 rows and 13 columns of light-emitting modules 20 distributed in an array. Along the X direction (the length direction of the carrier board) in the figure, the rightmost column of light-emitting modules 20 is denoted as the first column. Along the Y direction (the width direction of the carrier board) in the figure, the uppermost row of light-emitting modules 20 is denoted as the first row. Five groups of light-emitting modules 20 in the first to fifth columns of the first row, four groups of light-emitting modules 20 in the first to fourth columns of the second row, three groups of light-emitting modules 20 in the first to third columns of the third row, two groups of light-emitting modules 20 in the first to second columns of the fourth row, and one group of light-emitting modules 20 in the first column of the fifth row form the first region, and the other light-emitting modules 20 on the carrier board 10 form the second region. The first LED chips 221 (white light LED chips) in the light-emitting modules 20 in the first region and the second LED chips 222 (blue light LED chips) in the light-emitting modules 20 in the second region are connected in series to form a second LED light string. When conducting, the second state of the light-emitting device is realized, that is, a natural light-like lighting effect similar to "blue sky and white clouds".

[0052] Referring Figure 5 As shown, to achieve the third state of the light-emitting device, the distribution of the light-emitting modules 20 constituting the third region of the carrier board 10 is as follows: 13 groups in the first row, 11 groups in the second row, 10 groups in the third row, 8 groups in the fourth row, 7 groups in the fifth row, 5 groups in the sixth row, 4 groups in the seventh row, 3 groups in the eighth row, 2 groups in the ninth row, and 1 group in the tenth row. The number of groups of the above light-emitting modules is the number of consecutive light-emitting modules 20 along the X direction starting from the first column. The other light-emitting modules 20 on the carrier board 10 constitute the fourth region of the carrier board 10. The second LED chips 222 (blue light LED chips) in the light-emitting modules 20 in the third region and the third LED chips 223 (orange light LED chips) in the light-emitting modules 20 in the fourth region are connected in series to form a second LED light string. When conducting, the third state of the light-emitting device is realized, that is, a natural light-like effect similar to "sunset and dawn".

[0053] It can be seen from the above technical solutions that the present utility model has the following beneficial effects:

[0054] The present utility model places multiple mutually independent LED chips on the same substrate to form a light-emitting module. By connecting the LED chips in different light-emitting modules in series to form multiple LED light strings in the light-emitting device, it is realized that the LED chips in the light-emitting device can be conducted in several paths respectively, without the need to separately control a certain one or a certain region of LED chips, greatly simplifying the driving scheme and control system;

[0055] This invention achieves a natural light effect similar to "blue sky and white clouds" and "sunset and sunrise" by connecting LED chips in different light-emitting modules in series, which is convenient and effective.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A light-emitting device, characterized in that, The light-emitting device includes a carrier plate and a plurality of light-emitting modules located on the carrier plate. Each light-emitting module includes a substrate and a plurality of LED chips located on the substrate. The LED chips in different light-emitting modules are connected in series to form LED strings. Each light-emitting module includes at least a first LED chip, a second LED chip, and a third LED chip that are independent of each other. The light-emitting device forms at least a first LED string, a second LED string, and a third LED string. The first LED string is composed of the first LED chips in each light-emitting module connected in series. The second LED string is composed of a portion of the first LED chips and a portion of the second LED chips connected in series. The third LED string is composed of a portion of the second LED chips and a portion of the third LED chips connected in series.

2. The light-emitting device according to claim 1, characterized in that, The light-emitting module array is distributed on the carrier plate.

3. The light-emitting device according to claim 1, characterized in that, The carrier plate includes a first region and a second region that are separated from each other. A first LED chip in the first region and a second LED chip in the second region are connected in series to form a second LED string. The first region is located at the corner of the carrier plate.

4. The light-emitting device according to claim 1, characterized in that, The carrier board includes a third region and a fourth region that are separated from each other. The second LED chip in the third region and the third LED chip in the fourth region are connected in series to form a third LED string.

5. The light-emitting device according to claim 1, characterized in that, The light-emitting device includes: In the first state, the first LED string is turned on; In the second state, the second LED string is turned on; In the third state, the third LED string is turned on.

6. The light-emitting device according to claim 1, characterized in that, The first LED chip is a white LED chip, the second LED chip is a blue LED chip, and the third LED chip is an orange LED chip.

7. The light-emitting device according to claim 6, characterized in that, The center color coordinates of the second LED chip are (0.16, 0.22), and the color coordinates of the second LED chip lie within a 7th-order McAdam ellipse surrounding the center color coordinates; and / or, The center color coordinates of the third LED chip are (0.55, 0.42), and the color coordinates of the third LED chip are located within a 7th-order McAdam ellipse surrounding the center color coordinates.

8. The light-emitting device according to claim 1, characterized in that, Each of the light-emitting modules also includes a diffusion lens that corresponds to each of the LED chips.

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