Light emitting device

Abstract

The invention discloses a light-emitting device which comprises a carrier plate and a plurality of light-emitting modules located on the carrier plate, each light-emitting module comprises a substrate and a plurality of LED chips located on the substrate, and the LED chips in different light-emitting modules are connected in series to form an LED lamp string. According to the invention, through simple and effective architecture design, the LED chips in the light-emitting device are divided into several paths to be conducted respectively, and a driving scheme and a control system are simplified.

Description

Technical Field

[0001] The present invention belongs to the field of semiconductor technology, and in particular relates to a light emitting device. Background Art

[0002] LED light source is the most widely used light-emitting device at present. It is a technical solution for realizing pixelated light source and is widely used in light-emitting devices such as display screens and car headlights. At present, with the further development of LED chips, people's demand for lighting effects is also increasing. By preparing light-emitting devices that imitate natural light effects such as "blue sky and white clouds", similar outdoor lighting effects can be achieved.

[0003] In the prior art, a light-emitting device is prepared by forming an array of colorful LED (RGB three primary colors) chips. Each LED chip or an area of ​​LED chips is individually controlled by a control system to adjust the color and brightness of each LED chip or each area, ultimately achieving an effect similar to natural light such as "blue sky and white clouds".

[0004] However, existing light-emitting devices have the following disadvantages: (1) The saturation of RGB LED chips is very high, which results in poor user comfort when used for lighting; (2) In order to achieve individual 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 technical problems, it is necessary to provide a light emitting device. Summary of the invention

[0006] The object of the present invention is to provide a lighting device which can achieve a realistic natural light-simulating lighting effect through a simple and effective structural design.

[0007] In order to achieve the above purpose, the technical solution provided by an embodiment of the present invention is as follows:

[0008] A light-emitting device comprises a carrier board and a plurality of light-emitting modules located on the carrier board, wherein the light-emitting modules comprise a substrate and a plurality of LED chips located on the substrate, and the LED chips in different light-emitting modules are connected in series to form an LED light string.

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

[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 which are independent of each other.

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

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

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

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

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

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

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

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

[0019] In one embodiment, the central color coordinates of the second LED chip are (0.16, 0.22), and the color coordinates of the second LED chip are located within a 7-step MacAdam ellipse around the central color coordinates; and / or,

[0020] The central 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 7-step MacAdam ellipse surrounding the central color coordinates.

[0021] In one embodiment, each of the light-emitting modules further includes a diffusion lens arranged in a one-to-one correspondence with the LED chips.

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

[0023] The present invention places multiple independent LED chips on the same substrate to form a light-emitting module, and forms multiple LED light strings in the light-emitting device by connecting LED chips in different light-emitting modules in series, so that the LED chips in the light-emitting device can be turned on separately in several ways, without the need to control a certain LED chip or a certain area separately, which greatly simplifies the driving scheme and control system;

[0024] The present invention conveniently and effectively realizes the simulated natural light effects similar to "blue sky and white clouds" and "sunset and morning glow" through the series combination of LED chips in different light-emitting modules. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a schematic diagram of the planar structure of the light emitting device in Embodiment 1 of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the light-emitting module in Embodiment 1 of the present invention;

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure of the light-emitting module in Embodiment 1 of the present invention;

[0029] Figure 4 Schematic diagram of the distribution of LED chips in the second LED light string in Embodiment 1 of the present invention;

[0030] Figure 5 Schematic diagram of the distribution of LED chips in the third LED light string in Example 1 of the present invention.

[0031] Description of main reference numerals:

[0032] 10 - carrier board, 20 - light-emitting module, 21 - substrate, 221 - first LED chip, 222 - second LED chip, 223 - third LED chip, 23 - diffusion lens. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only 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 should fall within the scope of protection of the present invention.

[0034] The invention discloses a light-emitting device, comprising a carrier and a plurality of light-emitting modules located on the carrier. The light-emitting modules comprise 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 lamp string.

[0035] The present invention is further described below with reference to specific examples.

[0036] Embodiment 1:

[0037] Ginseng Figure 1 Combined with Figure 2 As shown, the light-emitting device in this embodiment includes a carrier 10 and a plurality of light-emitting modules 20 located on the carrier 10. The light-emitting modules 20 include a substrate 21 and a plurality of LED chips located on the substrate 21. The LED chips in different light-emitting modules 20 are connected in series to form an LED light string.

[0038] The light emitting modules 20 are arrayed on the carrier 10 . Along the length direction of the carrier 10 , the light emitting device has multiple columns of light emitting modules 20 parallel to each other. Along the width direction of the carrier 10 , the light emitting device has multiple rows of light emitting modules 20 parallel to each other.

[0039] Combination Figure 3 As shown, the light-emitting module in this embodiment includes a first LED chip 221, a second LED chip 222 and a third LED chip 223 that are independent of each other. Each LED chip is provided with a diffusion lens 23 in a one-to-one correspondence. The light emitted by the LED chip is emitted to a diffusion plate (not shown) via the diffusion lens 23, and after being evenly lighted by the diffusion plate, it is emitted to the use space.

[0040] Specifically, in this embodiment, the first LED chip 221 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] The blue LED chip and the orange LED chip are customized LED chips that can directly emit blue light and orange light. The central 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 the 7-step MacAdam ellipse around the central color coordinates; the central 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 the 7-step MacAdam ellipse around the central color coordinates.

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

[0043] Each LED light string is independent of each other, free from interference, and can be turned on individually, that is, the light emitting device in this embodiment includes three states (gears):

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

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

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

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

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

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

[0050] Similarly, to achieve the third state, the carrier board 10 is divided into a third area and a fourth area separated from each other, and the second LED chip 222 in the third area and the third LED chip 223 in the fourth area are connected in series to form a third LED light string.

[0051] More specifically, Figure 4 As shown, the light-emitting device in this embodiment includes light-emitting modules 20 arranged in an array of 10 rows and 13 columns. The rightmost column of light-emitting modules 20 is recorded as the first column along the X direction (the length direction of the carrier board) in the figure, and the topmost row of light-emitting modules 20 is recorded as the first row along the Y direction (the width direction of the carrier board) in the figure. The first region is composed of 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. The other light-emitting modules 20 on the carrier board 10 constitute the second region. The first LED chip 221 (white light LED chip) in the light-emitting module 20 in the first region and the second LED chip 222 (blue light LED chip) in the light-emitting module 20 in the second region are connected in series to form a second LED light string, which realizes the second state of the light-emitting device when turned on, that is, the natural light-simulating lighting effect similar to "blue sky and white clouds".

[0052] Ginseng Figure 5 As shown, to realize the third state of the light-emitting device, the distribution of the light-emitting modules 20 constituting the third area of ​​the carrier 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 light-emitting modules 20 continuous along the X direction from the first column. The other light-emitting modules 20 on the carrier 10 constitute the fourth area of ​​the carrier 10. The second LED chip 222 (blue LED chip) in the light-emitting module 20 in the third area and the third LED chip 223 (orange LED chip) in the light-emitting module 20 in the fourth area are connected in series to form a second LED light string, which realizes the third state of the light-emitting device when turned on, that is, the natural light effect similar to "sunset morning glow".

[0053] It can be seen from the above technical solution that the present invention has the following beneficial effects:

[0054] The present invention places multiple independent LED chips on the same substrate to form a light-emitting module, and forms multiple LED light strings in the light-emitting device by connecting LED chips in different light-emitting modules in series, so that the LED chips in the light-emitting device can be turned on separately in several ways, without the need to control a certain LED chip or a certain area separately, which greatly simplifies the driving scheme and control system;

[0055] The present invention conveniently and effectively realizes the simulated natural light effects similar to "blue sky and white clouds" and "sunset and morning glow" through the series combination of LED chips in different light-emitting modules.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A light emitting device, characterized in that: The light-emitting device comprises a carrier and a plurality of light-emitting modules located on the carrier. The light-emitting modules comprise 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 light string.

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

3. The light emitting device according to claim 1, characterized in that: Each of the light-emitting modules at least includes a first LED chip, a second LED chip and a third LED chip which are independent of each other.

4. The light emitting device according to claim 3, characterized in that: The light-emitting device is formed with at least a first LED light string, a second LED light string and a third LED light string. The first LED light string is composed of a first LED chip in each light-emitting module connected in series, the second LED light string is composed of a portion of the first LED chip and a portion of the second LED chip connected in series, and the third LED light string is composed of a portion of the second LED chip and a portion of the third LED chip connected in series.

5. The light emitting device according to claim 4, characterized in that: The carrier includes a first area and a second area separated from each other, a first LED chip in the first area and a second LED chip in the second area are connected in series to form a second LED light string, and the first area is located at a corner of the carrier.

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

7. The light emitting device according to claim 4, characterized in that: The light emitting device comprises: In the first state, the first LED light string is turned on; In the second state, the second LED light string is turned on; In the third state, the third LED lamp string is turned on.

8. The light emitting device according to claim 3, characterized in that: The first LED chip is a white light LED chip, the second LED chip is a blue light LED chip, and the third LED chip is an orange light LED chip.

9. The light emitting device according to claim 8, characterized in that: The central color coordinates of the second LED chip are (0.16, 0.22), and the color coordinates of the second LED chip are located within a 7-step MacAdam ellipse around the central color coordinates; and / or, The central 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 7-step MacAdam ellipse surrounding the central color coordinates.

10. The light emitting device according to claim 1, characterized in that: Each of the light-emitting modules further includes a diffusion lens arranged in one-to-one correspondence with the LED chips.

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