A full color gamut COB light source

Abstract

The utility model discloses a full color gamut's COB light source, including substrate and multiple groups of light source of being located on the substrate, be equipped with the dam on the substrate, and multiple groups of light source interval setting in the dam, multiple groups of light source include first light source, second light source, third light source and fourth light source, first light source is used to form warm white light source, second light source is used to form neutral white light source, third light source is used to form cold white light source, and fourth light source is used to form RGB light source, adopt the utility model provides full color gamut's COB light source, can improve the color rendering consistency and color temperature precision of light source significantly, and the spectral system of building is more continuous, more balanced.

Description

Technical Field

[0001] This utility model relates to the field of COB light source technology, and in particular to a full-color-gamut COB light source. Background Technology

[0002] Typical COB light sources usually achieve adjustable warm and cool light through RGB dimming chips, but the adjustable color gamut is relatively narrow. Although existing COB light sources have begun to integrate RGB dimming chips and warm and cool light dimming chips, due to the inherent defects of their spectral combination, traditional RGBCW products have significant bottlenecks in terms of spectral continuity optimization, precise adjustment of color coordinates, and high luminous efficiency output. Especially when simulating the transition of the entire color temperature range of natural light sources, problems such as color deviation and luminous efficiency attenuation often occur, making it difficult to meet the stringent requirements for light quality in high-end lighting, professional displays, and other fields. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a full-color-gamut COB light source, which significantly improves the color rendering consistency and color temperature accuracy of the light source, and constructs a more continuous and balanced spectral system.

[0004] To solve the above-mentioned technical problems, this utility model provides a full-color-gamut COB light source, including a substrate and multiple sets of light sources disposed on the substrate; the substrate is provided with a dam, and the multiple sets of light sources are spaced apart within the dam; the multiple sets of light sources include a first light source, a second light source, a third light source and a fourth light source; the first light source is used to form a warm white light source, the second light source is used to form a neutral white light source, the third light source is used to form a cool white light source, and the fourth light source is used to form an RGB light source.

[0005] As an improvement to the above scheme, the color temperature of the first light source is 1000K to 2000K, the color temperature of the second light source is 4000K to 6000K, and the color temperature of the third light source is 8000K to 10000K.

[0006] As an improvement to the above solution, the fourth light source includes a red light chip, a green light chip, and a blue light chip, which are arranged at intervals.

[0007] The red light chip, green light chip, and blue light chip are one of the following: upright chip, flip chip, or vertical chip.

[0008] As an improvement to the above scheme, the dam includes a first dam, and the first light source, the second light source, the third light source and the fourth light source are arranged at intervals within the first dam.

[0009] As an improvement to the above scheme, the dam includes a first dam and a second dam, the second dam is located inside the first dam, the first luminous area is between the first dam and the second dam, and the second luminous area is inside the second dam; the fourth light source is located in the first luminous area, and the first light source, the second light source and the third light source are spaced apart in the second luminous area.

[0010] As an improvement to the above scheme, the area ratio of the first light-emitting region and the second light-emitting region is 1:(1~3).

[0011] As an improvement to the above solution, the first light source includes a first chip and a first phosphor layer, wherein the first phosphor layer covers the top of the first chip;

[0012] The second light source includes a second chip and a second phosphor layer, with the second phosphor layer covering the top of the second chip;

[0013] The third light source includes a third chip and a third phosphor layer, with the third phosphor layer covering the top of the third chip;

[0014] The first chip, the second chip, and the third chip are blue light chips.

[0015] As an improvement to the above scheme, the ratio of the number of the first chip, the second chip and the third chip is 1:(0.5~1):(1~2).

[0016] As an improvement to the above solution, the substrate is provided with pads, which include a common first pad, a red light second pad, a green light second pad, a blue light second pad, a cool white light second pad, a neutral white light second pad, and a warm white light second pad; the pads are located on the outside of the dam.

[0017] As an improvement to the above solution, the full-color-gamut COB light source further includes a transparent encapsulating adhesive layer, which at least covers the fourth light source.

[0018] The present invention has the following beneficial effects:

[0019] This invention introduces a neutral white light source, which works in conjunction with cool white, warm white, and RGB light sources to construct a more continuous and balanced ultra-wide spectral system covering the entire color temperature range. The neutral white light source endows the full-color-gamut COB light source with more precise color coordinate adjustment capabilities. By dynamically adjusting the light intensity of each light source, the color coordinates are stably aligned with the black line, significantly improving the color rendering consistency and color temperature accuracy of the full-color-gamut COB light source. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a full-color gamut COB light source provided in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a full-color-gamut COB light source provided in another embodiment of this utility model;

[0022] Figure 3 This is a CIE chromaticity diagram of a full-gamut COB light source provided in one embodiment of this utility model. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the following will describe this utility model in further detail with reference to the accompanying drawings. It is hereby declared that the terms "up," "down," "left," "right," "front," "back," "inner," and "outer," etc., appearing or about to appear in this document, are based solely on the accompanying drawings and are not intended to specifically limit this utility model.

[0024] like Figure 1 As shown, this utility model embodiment provides a full-color gamut COB light source, including a substrate 1 and multiple sets of light sources disposed on the substrate 1; the substrate 1 is provided with a dam, and the multiple sets of light sources are spaced apart within the dam; the multiple sets of light sources include a first light source 21, a second light source 22, a third light source 23, and a fourth light source 24; the first light source 21 is used to form a warm white light source, the second light source 22 is used to form a neutral white light source, the third light source 23 is used to form a cool white light source, and the fourth light source 24 is used to form an RGB light source.

[0025] This invention introduces a neutral white light source to construct an ultra-wide spectral system covering the entire color temperature range. The neutral white light source works in conjunction with cool white, warm white, and RGB light sources to create a more continuous and balanced spectral system. The neutral white light source endows the full-gamut COB light source with more precise color coordinate adjustment capabilities. By dynamically adjusting the light intensity of each light source, the color coordinates are stably aligned with the black line, significantly improving the color rendering consistency and color temperature accuracy of the full-gamut COB light source.

[0026] Specifically, the color temperature of the first light source 21 is 1000K to 2000K, the color temperature of the second light source 22 is 4000K to 6000K, and the color temperature of the third light source 23 is 8000K to 10000K. Among these, the neutral white light channel with a color temperature of 4000K to 6000K and the warm white light channel with a color temperature of 1000K to 2000K...

[0027] The 8000K–10000K cool white light channel and the RGB channel work together to construct an ultra-wide spectral system covering the entire color temperature range of 1500K–8500K. The white light in the 4000K–6000K color temperature range fills the key gap in the spectral control of neutral white temperature in traditional solutions.

[0028] It is understood that the fourth light source 24 includes a red light chip 241, a green light chip 242, and a blue light chip 243, which are arranged at intervals; the red light chip 241, the green light chip 242, and the blue light chip 243 are one of upright chips, flip chips, or vertical chips.

[0029] In one embodiment, the dam includes a first dam 11, and the first light source 21, the second light source 22, the third light source 23 and the fourth light source 24 are spaced apart within the first dam 11, which helps to ensure that the emitted light is uniformly mixed in color after optical processing.

[0030] like Figure 2 As shown, in another embodiment, the dam includes a first dam 11 and a second dam 12. The second dam 12 is located inside the first dam 11. The area between the first dam 11 and the second dam 12 is a first light-emitting area 31, and the area inside the second dam 12 is a second light-emitting area 32. The fourth light source 24 is located in the first light-emitting area 31, and the first light source 21, the second light source 22, and the third light source 23 are spaced apart in the second light-emitting area 32. That is, the RGB light source is located in the first light-emitting area 31, and the cool white light source, the neutral white light source, and the warm white light source are located in the second light-emitting area 32. The first light-emitting area 31 surrounds the second light-emitting area 32. The arrangement of the second dam 12 can reduce the mutual interference between the RGB light source and the cool white light source, the neutral white light source, and the warm white light source, thereby improving the color rendering accuracy. Specifically, the RGB light source is positioned within the first luminous area 31 of the outer ring, which expands the color gamut, provides dynamic color changes, and helps the light diffuse outwards, reducing color accumulation in the central area. The cool white, neutral white, and warm white light sources are positioned within the second luminous area 32 of the inner ring, providing basic illumination and concentrating light emission to ensure luminous flux and uniformity in the central area. Furthermore, the red light chip 241 in the RGB light source generates significant heat; placing it on the outer ring improves heat dissipation.

[0031] In a preferred embodiment, the area ratio of the first light-emitting area 31 to the second light-emitting area 32 is 1:(1-3). The first light-emitting area 31 has a larger area, which is suitable for application scenarios with dynamic dimming and color adjustment; the second light-emitting area 32 has a larger area, which can realize general-purpose lighting dominated by white light.

[0032] It is understood that the first light source 21 includes a first chip and a first phosphor layer, with the first phosphor layer covering the top of the first chip;

[0033] The second light source 22 includes a second chip and a second phosphor layer, with the second phosphor layer covering the top of the second chip;

[0034] The third light source 23 includes a third chip and a third phosphor layer, the third phosphor layer covering the top of the third chip;

[0035] Optionally, the first, second, and third chips are blue light chips, and light sources with different color temperatures are achieved by covering them with different fluorescent adhesives.

[0036] In a preferred embodiment, the ratio of the first chip, the second chip, and the third chip is 1:(0.5-1):(1-2). By optimizing the ratio of the first chip, the second chip, and the third chip, color temperature flexibility, high color rendering index, and energy efficiency are all taken into account, making it particularly suitable for high-end intelligent lighting systems.

[0037] In addition, the substrate 1 is provided with pads, including a common first pad 131, a red second pad 132, a green second pad 133, a blue second pad 134, a cool white second pad 135, a neutral white second pad 136, and a warm white second pad 137; the pads are located outside the dam. After the chips in the first light source 21, the second light source 22, the third light source 23, and the fourth light source 24 are connected in series or in parallel in different regions, the first electrode is electrically connected to the common first pad 131, and the second electrode is electrically connected to the red second pad 132, the green second pad 133, the blue second pad 134, the cool white second pad 135, the neutral white second pad 136, and the warm white second pad 137, respectively.

[0038] Furthermore, the full-gamut COB light source also includes a transparent encapsulating layer, which at least covers the fourth light source 24, improving the hermeticity of the full-gamut COB light source. It is understood that the transparent encapsulating layer can also cover the sides of the first chip, the second chip, and the third chip to ensure the reliability of the light emission from the first light source 21, the second light source 22, and the third light source 23.

[0039] In summary, the full-gamut COB light source provided by this embodiment of the invention innovatively introduces a neutral white light channel with a color temperature of 4000K to 6000K, constructing an ultra-wide spectral system covering the entire color temperature range of 1500K to 8500K. This specific color temperature range of white light precisely fills the key gap in mid-color temperature spectral control in traditional solutions, and through synergy with the existing RGBCW channel, constructs a more continuous and balanced spectral system. Figure 3The CIE chromaticity diagram of the full-gamut COB light source provided in this embodiment of the invention shows that the newly added neutral white light channel gives the COB product more precise color coordinate adjustment capabilities, enabling accurate positioning of the color coordinates on the blackbody trajectory (black track). Whether reproducing the soft warm white light of early morning or simulating the bright cool white light of midday, the COB product provided in this embodiment of the invention can dynamically adjust the light intensity of each channel to ensure that the color coordinates stably conform to the black track, significantly improving the color rendering consistency and color temperature accuracy of the light source. The full-gamut COB light source provided in this embodiment of the invention not only breaks through the performance boundaries of traditional multi-color products, but also provides an ideal solution that is closer to natural light sources for professional lighting, film and television shooting, high-end displays, and other fields.

[0040] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. A full-gamut COB light source, characterized in that, The system includes a substrate and multiple sets of light sources disposed on the substrate; the substrate is provided with a dam, and the multiple sets of light sources are spaced apart within the dam; the multiple sets of light sources include a first light source, a second light source, a third light source, and a fourth light source; the first light source is used to form a warm white light source, the second light source is used to form a neutral white light source, the third light source is used to form a cool white light source, and the fourth light source is used to form an RGB light source.

2. The full-gamut COB light source as described in claim 1, characterized in that, The color temperature of the first light source is 1000K to 2000K, the color temperature of the second light source is 4000K to 6000K, and the color temperature of the third light source is 8000K to 10000K.

3. The full-gamut COB light source as described in claim 1, characterized in that, The fourth light source includes a red light chip, a green light chip, and a blue light chip, which are arranged at intervals. The red light chip, green light chip, and blue light chip are one of the following: upright chip, flip chip, or vertical chip.

4. The full-gamut COB light source as described in claim 1, characterized in that, The dam includes a first dam, and the first light source, the second light source, the third light source and the fourth light source are spaced apart inside the first dam.

5. The full-gamut COB light source as described in claim 1, characterized in that, The dam includes a first dam and a second dam, with the second dam located inside the first dam. The area between the first dam and the second dam is a first luminous area, and the area inside the second dam is a second luminous area. The fourth light source is located in the first luminous area, and the first light source, the second light source, and the third light source are spaced apart in the second luminous area.

6. The full-gamut COB light source as described in claim 5, characterized in that, The area ratio of the first light-emitting region to the second light-emitting region is 1:(1~3).

7. The full-gamut COB light source as described in claim 1, characterized in that, The first light source includes a first chip and a first phosphor layer, the first phosphor layer covering the top of the first chip; The second light source includes a second chip and a second phosphor layer, with the second phosphor layer covering the top of the second chip; The third light source includes a third chip and a third phosphor layer, with the third phosphor layer covering the top of the third chip; The first chip, the second chip, and the third chip are blue light chips.

8. The full-gamut COB light source as described in claim 7, characterized in that, The ratio of the number of the first chip, the second chip, and the third chip is 1:(0.5~1):(1~2).

9. The full-gamut COB light source as described in claim 1, characterized in that, The substrate is provided with pads, which include a common first pad, a red light second pad, a green light second pad, a blue light second pad, a cool white light second pad, a neutral white light second pad, and a warm white light second pad; the pads are located on the outside of the dam.

10. The full-gamut COB light source as described in claim 1, characterized in that, The full-color-gamut COB light source also includes a transparent encapsulating adhesive layer, which at least covers the fourth light source.

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