High-power mixed-color LED

Abstract

A high-power color-mixed LED relates to the technical field of color-mixed LEDs, and comprises a white light chip, a red light chip, a green light chip and a blue light chip, the white light chip, the red light chip, the green light chip and the blue light chip are arranged into an outer chip group and an inner chip group, the outer chip group surrounds the inner chip group, and the inner chip group surrounds the outer chip group. The number of the white light chips in the outer chip set accounts for half or more of the total number of the chips in the outer chip set. The outer chip set does not comprise a blue light chip. The white light chips on the outer chip set cover and fade non-white light rays emitted from the edge, so that it is guaranteed that the edge can keep the same white as the middle while the high-power color-mixed LED emits strong light, and the light emitting consistency of the color-mixed LED is improved.

Description

Technical Field

[0001] The present application relates to the technical field of color-mixing LEDs, and in particular to a high-power color-mixing LED. Background Art

[0002] With the continuous advancement of lighting technology, LED (light emitting diode) has been widely used in various lighting equipment due to its high efficiency, environmental protection, long life and other characteristics. Among them, the emergence of multi-color high-power LED provides a richer color selection for lighting equipment. However, in the application of multi-color high-power LED, due to the large luminous power, when there is a power difference between the light-emitting chips of different colors, it is easy to cause polarization. When the light source is lit through the lens, the naked eye can directly see the obvious color difference at different positions.

[0003] Usually, mixed-color LEDs will emit non-white light through active adjustment to reduce the impact of polarization. Utility model patent announcement number CN218333803U discloses a mixed-color LED lamp bead, which includes at least two groups of LED chip units, each group of LED chip units includes first to third LED chips, the main wavelengths of the first to third LED chips are different, and the first to third LED chips in each group of LED chip units are arranged longitudinally; at least two first LED chips in at least two groups of LED chip units are chips of the same color system with the same rated power and a main wavelength fluctuation range of less than 1.5%, and / or at least two second LED chips in at least two groups of LED chip units are chips of the same color system with the same rated power and a main wavelength fluctuation range of less than 1.5%, and / or at least two third LED chips in at least two groups of LED chip units are chips of the same color system with the same rated power and a main wavelength fluctuation range of less than 1.5%. The utility model solves the polarization problem of the mixed-color LED when the chip is damaged by using the same color chip with similar wavelength, but it can only avoid the polarization phenomenon in the middle. When emitting light to the outside where there is no corresponding light source, the edge area of ​​the mixed-color LED will have polarization phenomenon. Summary of the invention

[0004] In order to solve the problem of polarization at the edge of a mixed-color LED, the present application provides a high-power color-changing LED.

[0005] The high-power mixed-color LED provided in this application adopts the following technical solution:

[0006] A high-power mixed-color LED includes a white light chip, a red light chip, a green light chip and a blue light chip, wherein the white light chip, the red light chip, the green light chip and the blue light chip are arranged into an outer chip group and an inner chip group, wherein the outer chip group surrounds the inner chip group, and the number of white light chips in the outer chip group occupies half or more of the total number of chips in the outer chip group. The outer chip group does not include a blue light chip.

[0007] By adopting the above technical solution, for a white light emitting LED, it is necessary to mix the light emitting chips of red, green and blue colors. Compared with an LED using only white light, the LED formed by mixing colors has higher brightness and lower energy consumption. When the light emitting power of the light emitting chip deviates, although the polarization phenomenon is not obvious in the middle of the LED due to the masking of strong light, the edge of the LED has a more serious polarization phenomenon because there is no strong light masking. By arranging an outer chip group with more white light chips at the edge of the mixed color LED, the light emitting chips at the edge are mostly white light, and even if the light emission weakens, polarization will not appear at the edge, and the polarization caused by the weakening of the light emission of the middle light emitting chip will also be covered by the white light at the edge; and since the polarization caused by blue light is more obvious and difficult to be covered by the white light at the edge, the white light is no longer arranged in the outer chip group, and the blue light is only arranged in the inner chip group. Even if the light emission weakens, it will not be too obvious. By arranging an outer chip group containing a large number of white light chips, the mixed color LED can maintain white at the edge, thereby maintaining the consistency of the light emission of the mixed color LED and avoiding the occurrence of polarization.

[0008] Optionally, the external chipset includes a white light chip and a red light chip.

[0009] By adopting the above technical solution, since the wavelength of green light LED is longer than that of red light, although not as long as that of blue light, it is more likely to produce polarization than red light when the light emission changes greatly. Therefore, no green light chip is provided in the external chipset, so that the external chipset can better keep the edge of the mixed-color LED emitting white light and avoid polarization.

[0010] Optionally, the white light chip and the red light chip in the outer chipset are arranged alternately.

[0011] By adopting the above technical solution, the white light chip is usually prepared by changing the blue light using fluorescent powder. The light emitted is weaker, which plays a role in keeping the edge of the mixed-color LED from being polarized. Since the red light has a longer wavelength, it has less impact on the overall color when it becomes weaker, and can supplement the brightness of the edge white light, so that the external chipset can maintain a certain brightness while keeping the edge from being polarized, which is beneficial to maintaining the consistency of the light emission of the mixed-color LED.

[0012] Optionally, the outer chipset is arranged in the same manner as the inner chipset.

[0013] By adopting the above technical solution, the outer chipset uses white light to avoid polarization at the edge of the mixed-color LED. Therefore, only a circle of white light is needed around the outer layer, and there is no need to change the arrangement. By maintaining the arrangement of the outer chipset and the inner chipset, the same processing method can be used during processing to make the mixed-color LED.

[0014] Optionally, in the inner chipset, the distance between red light chips is greater than the distance between the red light chip and the blue light chip or the green light chip, the distance between green light chips is greater than the distance between the green light chip and the blue light chip or the red light chip, and the distance between blue light chips is greater than the distance between the blue light chip and the red light chip or the green light chip.

[0015] By adopting the above technical solution, in the inner chipset, it is necessary to ensure that the bright light emitted is uniform white light, so the light-emitting chips of the same color are kept away from each other, while the light-emitting chips of different colors are kept close to each other, so that the bright light emitted by the light-emitting chips in the inner chipset can be mixed into white light more quickly, thereby avoiding excessive concentration of light of each color and making it difficult to mix, forming polarized light, which is beneficial to the consistency of the mixed-color LED light emission.

[0016] Optionally, the inner chip group is arranged in a grid shape, and any four chips close to each other in the grid arrangement include a red light chip, a green light chip, and a blue light chip.

[0017] By adopting the above technical solution, the grid arrangement can make the light-emitting chips in the inner chip group be arranged more densely and close to each other, so that the light-emitting chips of three colors can form more uniform white light with higher brightness.

[0018] Optionally, any four chips close to each other in the grid arrangement are a white light chip, a red light chip, a green light chip and a blue light chip.

[0019] By adopting the above technical solution, by evenly distributing the white light chips in the grid-shaped inner chip group, white light can be doped into the three colors of light, so that the mixed-color LED can emit white light with more uniform color and brightness.

[0020] Optionally, the white light chip, the red light chip, the green light chip and the blue light chip are all square chips.

[0021] By adopting the above technical solution, the square chip can better fit the inner chip group arranged in a grid shape, so that the arrangement of the light-emitting chips is more dense, which is conducive to the consistency of the brightness and color of the mixed-color LED.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. An external chipset containing more than half of the white light chips is arranged at the edge of the mixed color LED, so that during the light emission process of the high-power mixed color LED, the white light chips on the external chipset cover the non-white light emitted from the edge, thereby ensuring that the high-power mixed color LED can maintain the same white color as the middle while emitting strong light, thereby improving the consistency of the mixed color LED light emission;

[0024] 2. The outer chip group includes white light chips and red light chips that are spaced apart. The wavelength of red light is longer and is easily faded and covered by white light. Therefore, the red light chip can be arranged in the outer chip group together with the white light chip. The red light chip can improve the brightness of the edge of the mixed-color LED while keeping the covering effect of the white light chip unaffected, so that the brightness of the mixed-color LED can be kept consistent;

[0025] 3. Through the grid-like arrangement of the internal chipset, the light-emitting chips can be arranged more densely, so that the light can be better mixed and the brightness of the mixed-color LED can be improved. In addition, any four light-emitting chips close to each other are white light chips, red light chips, green light chips and blue light chips, respectively, ensuring that the color and brightness of the white light emitted by the internal chipset are more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application;

[0027] Figure 2 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0028] Figure numerals: 1, external chipset; 2, internal chipset; 3, white light chip; 4, red light chip; 5, green light chip; 6, blue light chip. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1 To Attachment Figure 2 , further details of this application are given.

[0030] Example 1: A high-power mixed-color LED, referring to Figure 1 , including an outer chipset 1 and an inner chipset 2, the outer chipset 1 is arranged on the periphery of the inner chipset 2; the outer chipset 1 includes 10 white light chips 3, 9 red light chips 4 and 1 green light chip 5, and the white light chip 3 is mixed with the red light chip 4 and the green light chip 5, so that the white light chip 3 can be used to dilute and cover the primary color light of other colors; the inner chipset 2 includes 4 white light chips 3, 5 red light chips, 9 green light chips 5 and 10 blue light chips, and in the inner chipset 2, each of the mutually close The four groups of light-emitting chips all include a red light chip 4, a green light chip 5 and a blue light chip 6. By placing the three light-emitting chips close to each other, the light emitted by the inner chip group 2 can be evenly mixed into white light, which is beneficial to improving the light emission consistency of the mixed-color LED; the outer chip group 1 and the inner chip group 2 are both grid structures, and the white light chip 3, the red light chip 4, the green light chip 5 and the blue light chip 6 are all square chips, so that they can be better densely arranged in the outer chip group 1 and the inner chip group 2 with a grid structure.

[0031] The implementation principle of the embodiment of the present application is as follows: a white light chip 3, a red light chip 4, a green light chip 5 and a blue light chip 6 are arranged in the inner chipset 2, wherein the light emitted by the red light chip 4, the green light chip 5 and the blue light chip 6 can be mixed into white light, so the inner chipset 2 can emit white light, but since the red light chip 4, the green light chip 5 and the blue light chip 6 arranged at the edge will emit their own light to the outside where no corresponding mixed light source is arranged, polarization will occur at the edge of the mixed light LED. Therefore, a circle of outer chipset 1 is provided on the outside of the inner chipset 2, and the outer chipset 1 uses a large amount of white light, which can dilute and cover up the primary color light emitted to the outside, thereby facilitating the mixed color LED to maintain light emission consistency at the edge.

[0032] Example 2: A high-power mixed-color LED, referring to Figure 2 , including an outer chipset 1 and an inner chipset 2, the outer chipset 1 is arranged on the periphery of the inner chipset 2; the outer chipset 1 includes 16 white light chips 3 and 8 red light chips 4, by using a large number of white light chips 3, the white light chips 3 can be used to dilute and cover the primary color light of other colors, and avoid the continuous arrangement of the red light chips 4, which leads to excessive red light brightness and the edge polarization phenomenon of the mixed light LED; the inner chipset 2 includes 10 white light chips 3, 11 red light chips 4, 12 green light chips 5 and 12 blue light chips 6, among which four adjacent light-emitting chips include a white light chip 3, a red light chip 4, a green light chip 5 and a blue light chip 6, so that the colored light in the inner chipset 2 can be mixed into a more uniform white light after being emitted, which is conducive to ensuring the light emission consistency of the mixed color LED.

[0033] The implementation principle of the embodiment of the present application is as follows: the four light-emitting chips in the inner chip group 2 are neatly distributed, so that every four light-emitting chips close to each other can include one white light chip 3, one red light chip 4, one green light chip 5 and one blue light chip 6, and can emit light with uniform color and brightness in the inner chip group 2. At the same time, the inner chip group 2 will have two rows next to it consisting of green light chips 5 and blue light chips 6. Therefore, more red light chips 4 are provided on the adjacent outer chip group 1 for mixing, so that the edge of the mixed-color LED does not have polarization phenomenon, which is beneficial to ensure the light emission consistency of the mixed-color LED.

[0034] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-power mixed-color LED, comprising a white light chip (3), a red light chip (4), a green light chip (5) and a blue light chip (6), characterized in that: The white light chip (3), the red light chip (4), the green light chip (5) and the blue light chip (6) are arranged to form an outer chip group (1), and the white light chip (3), the red light chip (4) and the green light chip (5) are arranged to form an inner chip group (2). The outer chip group (1) surrounds the inner chip group (2), and the number of the white light chips (3) in the outer chip group (1) accounts for half or more of the total number of chips in the outer chip group (1).

2. A high-power color-mixing LED according to claim 1, characterized in that: The external chip group (1) comprises a white light chip (3) and a red light chip (4).

3. A high-power color-mixing LED according to claim 1, characterized in that: The white light chip (3) and the red light chip (4) in the external chip group (1) are arranged at intervals.

4. A high-power color-mixing LED according to claim 1, characterized in that: The outer chipset (1) and the inner chipset (2) are arranged in the same manner.

5. A high-power color-mixing LED according to claim 1, characterized in that: In the inner chip group (2), the distance between the red light chips (4) is greater than the distance between the red light chip (4) and the blue light chip (6) or the green light chip (5), the distance between the green light chips (5) is greater than the distance between the green light chip (5) and the blue light chip (6) or the red light chip (4), and the distance between the blue light chips (6) is greater than the distance between the blue light chip (6) and the red light chip (4) or the green light chip (5).

6. A high-power color-mixing LED according to claim 1, characterized in that: The inner chip group (2) is arranged in a grid shape, and any four chips close to each other in the grid shape arrangement include a red light chip (4), a green light chip (5) and a blue light chip (6).

7. A high-power color-mixing LED according to claim 6, characterized in that: Any four chips that are close to each other in the grid arrangement are a white light chip (3), a red light chip (4), a green light chip (5) and a blue light chip (6).

8. A high-power color-mixing LED according to claim 1, characterized in that: The white light chip (3), the red light chip (4), the green light chip (5) and the blue light chip (6) are all square chips.

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