Light-emitting device and light-emitting apparatus

Abstract

The utility model provides a light-emitting device and light-emitting equipment, and the light-emitting device at least comprises a substrate which is provided with an upper surface and a lower surface which are oppositely arranged, and the upper surface is provided with a die bonding area; the light-emitting units are mounted in the die bonding area of the substrate at intervals and are electrically connected with the substrate through the circuit layer; wherein the circuit layer at least comprises three circuit channels, and each circuit channel is independently controlled and comprises at least one light-emitting unit; a minimum distance L is arranged between the adjacent light-emitting units, and L is larger than or equal to 200 micrometers and smaller than or equal to 600 micrometers. According to the technical scheme, on the basis of an existing double-channel double-color-domain light-emitting device, the color temperature adjusting channel is additionally arranged, the three circuit channels independently control the color temperature, the light-emitting requirement of the white light source is jointly adjusted, light can be accurately adjusted and controlled to a standard color temperature arc, and the light-emitting efficiency is improved. And the light emitting effect is further optimized by limiting the distance between the light emitting units in the light emitting device, and a product with accurate color temperature and good light emitting brightness is obtained.

Description

Technical Field

[0001] The present application relates to the field of semiconductor devices, and in particular to a light-emitting device and a light-emitting equipment. Background Art

[0002] Light Emitting Diode (LED) is a semiconductor device whose basic structure includes a PN junction between a P-type semiconductor and an N-type semiconductor. When a forward voltage is applied to the LED, electrons and holes recombine at the junction of the PN junction to release energy, which is emitted in the form of photons to form light radiation. LED chips are widely used in display devices, vehicle lamps, general lighting and other fields due to their high reliability, long life and low power consumption.

[0003] Currently, the dimmable products on the market are usually dual-color temperature dual-channel products, which use two channels to adjust the color temperature of the emitted light. Figure 1 As shown in the figure, within the Energy Star standard color range, all color temperatures are on a parabola. However, the disadvantage of the above dual-channel products is that no matter how the current ratio of the two channels is adjusted, the color range between the two color temperatures cannot completely reach the Energy Star standard color range, and cannot meet the high requirements of random adjustment of white light sources within the full color range of Energy Star.

[0004] Therefore, in the manufacturing process of LED light-emitting devices, it is necessary to provide an improved technical solution for the above-mentioned deficiencies, so as to accurately control the color temperature of the product and obtain a light-emitting device and related light-emitting equipment with high-precision color temperature. Utility Model Content

[0005] In view of the defects and shortcomings in the prior art mentioned above, the present application provides a multi-channel, multi-color zone light-emitting device and light-emitting equipment with at least three or more circuit channels to accurately control the color temperature of the product and meet the high requirements of random adjustment of the light source within the full color gamut of Energy Star.

[0006] In order to achieve the above objectives and other related objectives, in a first aspect, the present application provides a light emitting device, comprising at least:

[0007] A substrate having an upper surface and a lower surface arranged opposite to each other, wherein a crystal-fixing area is arranged on the upper surface;

[0008] A plurality of light-emitting units are mounted at intervals in the die-bonding region of the substrate and are electrically connected to the substrate through a circuit layer; wherein:

[0009] The circuit layer includes at least three circuit channels, each of which is independently controlled and includes at least one light-emitting unit; there is a minimum distance L between adjacent light-emitting units, 200 μm≤L≤600 μm.

[0010] In a second aspect, the present application also provides a light-emitting device, which includes the light-emitting device provided by the above technical solution.

[0011] Compared with the prior art, the light-emitting device and light-emitting equipment provided by the present application have at least the following beneficial effects:

[0012] In the technical solution of the present application, a color temperature adjustment channel is added to the existing dual-channel dual-color domain light-emitting device. The three circuit channels independently control the color temperature and jointly adjust the light-emitting requirements of the white light source, so that the light can be accurately controlled to the standard color temperature arc. In addition, by limiting the spacing between each light-emitting unit in the light-emitting device, there is a minimum distance L between adjacent light-emitting units, 200μm≤L≤600μm, to optimize the light output effect.

[0013] In addition, the light-emitting device provided in the present application includes the light-emitting device provided by the above technical solution, and therefore, the light-emitting device also has the above good technical effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of the color gamut of the CIE 1931 color space;

[0015] Figure 2 It is a schematic diagram of the structure of a light-emitting device with dual channels and dual color temperatures in the prior art;

[0016] Figure 3 A schematic diagram of a light emitting device provided in Example 1 of the present application;

[0017] Figure 4 A schematic diagram of the arrangement of the light-emitting unit structure of the light-emitting device provided in Example 1 of the present application;

[0018] Figure 5 A schematic diagram of circuit connection of the light emitting device provided in Example 1 of the present application;

[0019] Figure 6 A schematic diagram of a light emitting device provided in Embodiment 2 of the present application;

[0020] Figure 7 A schematic diagram of the color gamut of the light-emitting device provided in this application;

[0021] Figure 8 A schematic diagram of the color gamut of the light-emitting device provided in this application.

[0022] List of reference numerals:

[0023] 100 substrates

[0024] 200 Line Layer

[0025] 210 First Channel

[0026] 220 Second Channel

[0027] 230 Third Channel

[0028] 300 light units

[0029] 400 Light conversion layer DETAILED DESCRIPTION

[0030] The following specific embodiments illustrate the implementation of the present application, and those familiar with the technology can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] It should be noted that the diagrams provided in the embodiments of the present application are only schematic illustrations of the basic concept of the present application. Although the diagrams only show the components related to the present application rather than the number, shape and size of the components in the actual implementation, the form, quantity and proportion of each component can be changed at will during the actual implementation, and the component layout form may also be more complex. The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the restrictive conditions that can be implemented in the present application, so they have no technical substantive significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present application without affecting the effects and purposes that can be achieved by the present application.

[0032] The color temperature control area of ​​the dual-channel product structure provided by the existing technology is as follows: Figure 1 As shown, the structure of the dual-channel product is as follows Figure 2 As shown, the first channel 210 and the second channel 220 are sequentially arranged on the substrate 100, which emit light of two different color temperatures respectively. For the white light source, the first channel 210 and the second channel 220 use two color temperatures of cool white light (Cool White) and warm white light (Warm White) for regulation, and the adjustable range falls within Figure 1However, within the Energy Star standard color range, all color temperatures are on a parabola. Therefore, no matter how the current ratio of the two channels is adjusted, the color range between the two color temperatures cannot completely reach the Energy Star standard color range, and cannot meet the high requirements of random adjustment of white light sources within the Energy Star full color range. Based on the background technology and the above technical defects, the present application provides a light-emitting device, comprising at least:

[0033] A substrate having an upper surface and a lower surface arranged opposite to each other, wherein a crystal-fixing area is arranged on the upper surface;

[0034] A plurality of light-emitting units are mounted at intervals in the die-bonding region of the substrate and are electrically connected to the substrate through a circuit layer; wherein:

[0035] The circuit layer includes at least three circuit channels, each of which is independently controlled and includes at least one light-emitting unit; there is a minimum distance L between adjacent light-emitting units, 200 μm≤L≤600 μm.

[0036] By adopting the above technical solution, a color temperature adjustment channel is added on the basis of the existing dual-channel dual-color domain light-emitting device. The three circuit channels independently control the color temperature and jointly adjust the light-emitting requirements of the white light source, so that the light can be accurately controlled to the standard color temperature arc. In addition, by limiting the spacing between each light-emitting unit in the light-emitting device, there is a minimum distance L between adjacent light-emitting units, 200μm≤L≤600μm, to optimize the light output effect.

[0037] In some embodiments, a light conversion layer is disposed above the light emitting unit so that the circuit channel emits light with several different color temperatures, including at least a first color temperature, a second color temperature, and a third color temperature. The third color temperature is defined as an adjusted color temperature, and the color temperature value of the light source emitted is further refined based on the regulation of the first color temperature and the second color temperature.

[0038] In some embodiments, the light conversion layer above each circuit channel has a width D, 500 μm≤D≤1100 μm. The light conversion layer can be a phosphorescent colloid layer formed by spraying or drawing process, and the width of the phosphorescent colloid layer is limited to balance the product brightness and light uniformity.

[0039] In some embodiments, in the CIE chromaticity diagram,

[0040] The coordinates of the first color temperature are P1(x1, y1); wherein x1≥0.29; y1≥0.285;

[0041] The coordinates of the second color temperature are P2(x2, y2); wherein x2≤0.567; y2≤0.414;

[0042] The coordinates of the third color temperature are P3(x3, y3), wherein x3≥0.305 and y3≤0.53. The third color temperature is set to cyan light to meet the high requirement of random adjustment of the white light source within the full color gamut.

[0043] In some embodiments, in the CIE chromaticity diagram,

[0044] The coordinates of the first color temperature are Q1(x1, y1); wherein x1≥0.238; y1≥0.316;

[0045] The coordinates of the second color temperature are Q2(x2, y2); wherein x2≤0.521; y2≤0.474;

[0046] The coordinates of the third color temperature are Q3 (x3, y3), wherein x3≤0.435 and y3≥0.255. The third color temperature is set to be pale yellow to meet the high requirement of random adjustment of the white light source within the full color gamut.

[0047] In some embodiments, the current ratio of the first color temperature channel to the second color temperature channel is between 5% and 100%, and the current ratio of the third color temperature channel is between 5% and 40%. The third color temperature channel is used as a color temperature control channel to accurately control the color temperature within the color gamut covered by the existing first color temperature channel and the second color temperature channel.

[0048] In some embodiments, the color temperature of the light emitted by the light emitting device ranges from 1800K to 8000K, which is suitable for color temperature control of white light sources.

[0049] In some embodiments, the substrate is made of one or more combinations of metal, ceramic, or silicon dioxide.

[0050] In some embodiments, each circuit channel has at least two light-emitting units connected in series and / or at least one group of light-emitting units connected in parallel, so as to provide a uniform and stable current and improve the uniformity of the color temperature of the light.

[0051] The present application also provides a light-emitting device, which includes the light-emitting device described in any one of the above technical solutions. Therefore, the light-emitting device also has the above good technical effects.

[0052] The technical solution of the present application is described in detail below through specific embodiments 1 to 3.

[0053] Embodiment 1:

[0054] This embodiment provides a light emitting device. Figures 3-4The light emitting device at least comprises a substrate 100, a circuit layer 200 and a light emitting unit 300, specifically:

[0055] The material of the substrate 100 includes one or more combinations of metal, ceramic or silicon dioxide. As an example, the substrate 100 is made of silicon dioxide. The substrate 100 has an upper surface and a lower surface that are arranged opposite to each other. Figure 3 Specifically shown is a schematic diagram of a top view of the light emitting device, where the surface pointed to by the viewing angle is the upper surface of the substrate 100, on which a crystal bonding area is provided, that is, an arrangement area of ​​the light emitting units 300;

[0056] A plurality of light-emitting units 300 are mounted at intervals in the die-bonding area of ​​the substrate 100, and are electrically connected to the substrate 100 through the circuit layer 200. An adhesive layer is further provided between the back surface of the light-emitting unit 300 and the upper surface of the substrate 100. The adhesive layer may be a die-bonding adhesive such as nanosilver with high thermal conductivity, which ensures a firm connection between the light-emitting unit 300 and the substrate 100, and can effectively control the operating temperature of the light-emitting device, thereby improving its light-emitting performance and quality reliability.

[0057] See also Figure 3 The circuit layer 200 includes at least three circuit channels. On the basis of the existing dual-channel dual-color gamut light-emitting device, a color temperature adjustment channel, namely the third channel 230, is added to form a channel structure in which the first channel 210, the second channel 220 and the third channel 230 are arranged alternately in sequence. Figure 3 The specific structure of the light-emitting device shown is as follows: a third channel 230 is set at the center of the light-emitting device as a newly added color temperature adjustment channel, and the first channel 210 and the second channel 220 are alternately arranged on both sides of the third channel 230 in sequence; lead electrodes for controlling the three circuit channels are respectively arranged on the substrate 100, and the light-emitting units 300 at both ends of each channel are connected to the corresponding lead electrodes through wires, so as to realize independent control of the color temperature by the three circuit channels, and jointly adjust the light emission requirements of the light source, so that the light can be accurately controlled to the standard color temperature arc. It can be understood that the first channel 210 and the second channel 220 can be symmetrically distributed on both sides of the third channel 230, or they can be asymmetrically distributed on both sides of the third channel 230. Figure 3 The structure shown is used as an example, when the first channel is a cool white light (Cool White) channel, the circuit is connected to the C+ and C- electrodes, when the second channel 220 is a warm white light (Warm White) channel, the circuit is connected to the W+ and W- electrodes, and when the third channel 230 is a cyan light (Cyan Green) channel, the circuit is connected to the G+ and G- electrodes. It can be understood that the upper and lower third channels 230 can also be light yellow or red light.

[0058] See also Figure 4Each circuit channel includes at least one light-emitting unit 300, and there is a minimum distance L between adjacent light-emitting units 300, 200μm≤L≤600μm, and the light-emitting effect is optimized by limiting the spacing between each light-emitting unit in the light-emitting device. It can be understood that the minimum distance L includes the distance between adjacent light-emitting units 300 in the same circuit channel ( Figure 4 The distance between adjacent circuit channels ( Figure 4 The distance L between adjacent light-emitting units 300 in the vertical direction (in the middle and upper directions) is set to be between 200μm and 600μm. As an example, the minimum distance L can be 200μm, 300μm, 400μm, 500μm or 600μm. When the minimum distance L is less than 200μm, the light-emitting units 300 are arranged too close, the light-emitting units 300 in a single circuit are crowded, the light emitted by each light-emitting unit 300 will interact with each other, and part of the light will be absorbed by the adjacent light-emitting units 300, which will cause the overall brightness of the light-emitting device to decrease; and when the minimum distance L exceeds 600μm, the spacing between adjacent light-emitting units 300 is too large, the light source point density of the light-emitting device is reduced, the light-emitting device will produce a decrease in overall light uniformity, produce undesirable phenomena such as light spots, and will also affect the light brightness to a certain extent. Furthermore, the minimum distance L is set to be between 300 μm and 500 μm to further optimize the light output effect, such as 330 μm, 380 μm, 420 μm or 470 μm. Figure 4 The arrangement of the light emitting unit 300 is shown as an example. Figure 4 Each row of light emitting units 300 arranged in sequence along the horizontal direction corresponds to Figure 3 For each light-emitting channel at the same position in the third channel 230, in order to optimize the color temperature adjustment range of the third channel 230, a suitable number of light-emitting units 300 need to be provided. However, considering the packaging process efficiency and packaging cost, the arrangement direction of most of the light-emitting units 300 in the same light-emitting device is consistent, for example Figure 4The first channel 210 and the second channel 220 on the upper and lower sides are arranged in sequence in a horizontal direction. If the light-emitting units 300 in the third channel 230 are arranged in the same direction, the number of light-emitting units 300 that can be accommodated in one channel is small. In order to achieve the precise color temperature control requirements, a larger current needs to be provided to the third channel 230. This arrangement method will sacrifice the service life of the product to a certain extent. If two parallel third channels 230 are provided, the arrangement space of the first channel 210 and the second channel 220 may be occupied. Therefore, the light-emitting units of the third channel 230 are arranged from a horizontal arrangement to a vertical arrangement. Under the premise of not excessively occupying the arrangement space of the first channel 210 and the second channel 220 on the upper and lower sides, more light-emitting units 300 can be accommodated in one channel. In this way, the color temperature adjustment can be completed by giving the third channel a suitable current ratio. Further, the third channel 230 includes 12 light-emitting units 300 arranged. Furthermore, the second channel 220 and the first channel 210 arranged in sequence on both sides of the third channel 230 have 7, 7, 5 and 5 light-emitting units 300 respectively. The number and arrangement order of the above circuit channels and the number of light-emitting units 300 in each circuit channel are circuit design arrangements with better light output efficiency and color temperature control accuracy.

[0059] In an optional embodiment, the light emitting units 300 in each circuit channel generally have a greater impact on the luminous brightness of the product than the reduction in the brightness of the product due to the mutual absorption of light from the light emitting units 300. In order to make the light emitting device have uniform and high brightness, the intervals of the light emitting units 300 in the same circuit channel are set to the same horizontal spacing, which can be the same as or different from the vertical spacing of the light emitting units 300 between different circuit channels, and the position of the light emitting units 300 in each circuit channel and the overall arrangement of the light emitting device can be optimized according to the actual product size and usage requirements.

[0060] In some embodiments, see Figures 3-4 , a light conversion layer 400 is arranged above the light-emitting unit 300, so that the circuit channel emits light with several different color temperatures, including at least a first color temperature, a second color temperature, and a third color temperature. The third color temperature is defined as an adjusted color temperature, and the color temperature value of the light source emitted is further refined on the basis of regulating the first color temperature and the second color temperature. Taking a light-emitting device that emits a white light source as an example, the first color temperature and the second color temperature can be cold white light and warm white light, respectively, and the third color temperature is cyan green light (Cyan Green) or phenol white (Phenol White) or red light, which is used to accurately regulate the precise color temperature of white light on the chromaticity diagram. It can be understood that the specific color naming of the third color temperature does not serve as a limitation on the specific color temperature value of the third color temperature. The third color temperature has a suitable color temperature range. In this embodiment, the colors within the color temperature range are generally named cyan green light or phenol white light or red light.

[0061] In some embodiments, see Figures 3-4 The light conversion layer 400 above each circuit channel has a width D, 500μm≤D≤1100μm. The light conversion layer 400 can be a phosphorescent colloid layer formed by spraying or drawing process, and the width of the phosphorescent colloid layer is limited to balance the brightness and light uniformity of the product. Figures 3-4 The structure of the light emitting device shown is taken as an example, Figure 4 Each light emitting unit 300 arranged in sequence along the horizontal direction corresponds to Figure 3 A light-emitting channel at the same position in the circuit. It can be understood that each circuit channel is covered with phosphorescent colloids for displaying light of different color temperatures. In order to make the structure of the diagram clear and easy to describe, Figure 4 Only the structure of the phosphorescent colloid layer covering the third channel 230 is shown, and the width D of the phosphorescent colloid layer is between 500μm and 1100μm. When the width D is less than 500μm, the coverage of the light-emitting area is insufficient, which affects the color of the light. When the color is inaccurate, it affects the final current ratio of the channel; and when the width D exceeds 1100μm, different phosphorescent colloid layers between adjacent channels interfere with each other, which may bring the risk of uneven light color. In an optional embodiment, a transparent conductive layer can also be provided between the light-emitting unit 300 and the light conversion layer 400 to make the light distribution of the phosphorescent layer more uniform and prevent overheating or damage caused by current concentration at the edge of the chip.

[0062] In some embodiments, see Figures 4-5 , each circuit channel has at least 2 light-emitting units 300 connected in series and / or at least 1 group of light-emitting units 300 connected in parallel to provide a uniform and stable current and improve the uniformity of the color temperature of the light. Both ends of each circuit are connected to the electrode pins of the substrate 100 by wires to achieve independent control of different circuit channels. In an optional embodiment, each circuit channel is a series circuit, and the series circuit has N light-emitting units 300 (N is a natural number and is greater than or equal to 2). In an optional embodiment, each circuit channel is a parallel circuit with M branches (M is a natural number and is greater than or equal to 2), and each branch has N light-emitting units 300 (N is a natural number and is greater than or equal to 2). Figure 5 Taking the circuit structure diagram of a circuit channel as an example, the circuit diagram can be any circuit of the first channel 210, the second channel 220 or the third channel 230. The circuit channel is a parallel circuit and has three branches, and each branch has five light-emitting units 300 connected in series to achieve a good light-emitting effect in the channel. It can be understood that the first channel 210, the second channel 220 and the third channel 230 can be the same or different circuit structures, and selective differentiation design is performed according to actual product requirements.

[0063] In some embodiments, see Figure 7 , in the CIE chromaticity diagram,

[0064] The coordinates of the first color temperature are P1(x1, y1); wherein x1≥0.29; y1≥0.285, which is the color temperature value range of cold white light;

[0065] The coordinates of the second color temperature are P2(x2, y2); wherein x2≤0.567; y2≤0.414, which is the color temperature value range of warm white light;

[0066] The coordinates of the third color temperature are P3(x3, y3); where x3≥0.305; y3≤0.53, and the third color temperature is set to cyan light to meet the high requirement of random adjustment of the white light source within the full color gamut. It can be understood that the third color temperature is a color temperature value range between the first color temperature and the second color temperature, and the color temperature values ​​of the first color temperature and the second color temperature can be fine-tuned, which is equivalent to Figure 7 Drag the displayed color temperature value in the chromaticity diagram to the upper left so that it falls on the standard color temperature arc of the chromaticity diagram to achieve a good effect of accurate light emission. Moreover, after the third color temperature of the cyan light is adjusted, not only the color temperature is controllable, but the luminous brightness of the product is also further improved. Furthermore, the optimal parameters of the coordinate P1 of the first color temperature of the cold white light are: x1≥0.30 and y1≥0.31; the optimal parameters of the coordinate P2 of the second color temperature of the warm white light are: x2≤0.48; y2≤0.41, which is the optimal value range of the color temperature of warm white light; the optimal parameters of the coordinate P3 of the third color temperature of the cyan light are: x3≥0.35; y3≤0.50.

[0067] In the above embodiment, the current ratio of the first color temperature channel and the second color temperature channel is between 5% and 100%; the current ratio of the third color temperature channel is between 5% and 40%. The third color temperature channel is used as a color temperature control channel to accurately control the color temperature within the color range covered by the existing first color temperature channel and the second color temperature channel. Therefore, a larger current should be applied to the circuit channel where the first color temperature and the third color temperature are located, which plays a major role in color temperature control. Using the first color temperature and the second color temperature to control the color temperature of the light-emitting device is also the best and most efficient dimming method, and the third color temperature is only used to accurately control the color temperature, providing a current ratio of 5% to 40%. When the third color temperature is cyan light, it is far from the color temperature range of cold white light and warm white light. The efficiency of adjusting the color temperature by applying a larger voltage and current to the cyan light is extremely low, which wastes energy and accelerates the loss of the light-emitting unit 300, reducing the product life. It can be understood that when the color temperature range of cyan light is used as the third color temperature, the closer the third color temperature parameter value is to the green color gamut, the smaller the current ratio applied to the third channel 230 adjusted to the precise color temperature, and the better the brightening effect on the product; and when the third color temperature parameter value is closer to white light, the greater the current ratio applied to the third channel 230 to adjust to the precise color temperature. In the actual production process, multiple factors such as manufacturing cost, product usage scenarios, and service life should be considered at the same time to select the most suitable third color temperature range and current ratio parameters.

[0068] In some embodiments, see Figure 8 , in the CIE chromaticity diagram,

[0069] The coordinates of the first color temperature are Q1(x1, y1); wherein x1≥0.238; y1≥0.316, which is the color temperature value range of cold white light;

[0070] The coordinates of the second color temperature are Q2(x2, y2); wherein x2≤0.521; y2≤0.474; which is the color temperature value range of warm white light;

[0071] The coordinates of the third color temperature are Q3(x3, y3); where x3≤0.435; y3≥0.255, and the third color temperature is set to pale yellow to meet the high requirement of random adjustment of the white light source within the full color gamut. Similar to the above technical solution of setting the third color temperature to cyan light, in this embodiment, the third color temperature is set to pale yellow, which is equivalent to Figure 8Drag the value of the displayed color temperature in the chromaticity diagram to the lower right so that it falls on the standard color temperature arc of the chromaticity diagram to achieve a good effect of accurate light output. Unlike the technical solution of setting the point color temperature to cyan light, setting the third color temperature to light yellow light may affect the brightness of the light output to a certain extent, but considering other factors such as the cost in actual production, the third color temperature of light yellow light can still meet the needs of precise control and is more conducive to large-scale market promotion and use. Furthermore, the optimal parameters of the coordinate Q1 of the first color temperature of cold white light are: x1≥0.28 and y1≥0.32; the optimal parameters of the coordinate Q2 of the second color temperature of warm white light are: x2≤0.49; y2≤0.44, which is the optimal value range of the color temperature of warm white light; the optimal parameters of the coordinate Q3 of the third color temperature of light yellow light are: x3≤0.41; y3≥0.26.

[0072] When the third color temperature is pale yellow light, similar to cyan light, it is still far from the color temperature range of cold white light and warm white light. The efficiency of adjusting the color temperature by applying a large voltage and current to the pale yellow light is also extremely low. Therefore, the current ratio of the third color temperature channel of the pale yellow light is also set to between 5% and 40% to achieve a balance between precise color temperature control and production cost. It can be understood that when the color temperature range of pale yellow light is used as the third color temperature, the closer the third color temperature parameter value is to the red color domain, the smaller the current ratio applied to the third channel 230 adjusted to the precise color temperature, but it will affect the product brightness to a certain extent; and when the third color temperature parameter value is closer to white light, the greater the current ratio applied to the third channel 230 to adjust to the precise color temperature, but the product luminous brightness loss is lower. In the actual production process, the manufacturing cost and the product use scenario, service life and other factors should be considered at the same time to select the most suitable third color temperature range and current ratio parameters.

[0073] In an optional implementation manner, the third color temperature may also be set to red light. In the CIE chromaticity diagram, red light corresponds to Figure 8 The color gamut below Q2 and toward Q3 (not specifically shown in the figure) When the third color temperature is red light, the color temperature adjustment principle is similar to the adjustment principle of the two third color temperatures provided in the above implementations, and will not be described in detail here.

[0074] The color temperature range of the light emitted by the light emitting device provided in this embodiment is between 1800K and 8000K. The multi-channel multi-color gamut light emitting device provided in this embodiment is particularly suitable for color temperature control of white light sources. It can be understood that the precise control of other color temperatures can also adopt the technical solution provided in this embodiment. Since it has similar technical principles, it will not be repeated here.

[0075] Embodiment 2:

[0076] This embodiment provides a light emitting device. Figure 6The light emitting device at least comprises a substrate 100, a circuit layer 200 and a light emitting unit 300, specifically:

[0077] The substrate 100 is made of silicon dioxide. The substrate 100 has an upper surface and a lower surface that are arranged opposite to each other. Figure 6 Specifically shown is a schematic diagram of a top view of the light emitting device, where the surface pointed to by the viewing angle is the upper surface of the substrate 100, and a crystal-fixing area is provided on the upper surface of the substrate 100, that is, the arrangement area of ​​the light emitting unit 300;

[0078] A plurality of light-emitting units 300 are mounted at intervals in the die-bonding region of the substrate 100 and are electrically connected to the substrate 100 through the circuit layer 200;

[0079] The circuit layer 200 includes at least three circuit channels. On the basis of the existing dual-channel dual-color gamut light-emitting device, a color temperature adjustment channel, i.e., the third channel 230, is added to form a channel structure in which the first channel 210, the second channel 220, and the third channel 230 are arranged alternately in sequence. Each circuit channel includes at least one light-emitting unit 300, and there is a minimum distance L between adjacent light-emitting units 300, 200μm≤L≤600μm, and the light-emitting effect is optimized by limiting the spacing between each light-emitting unit in the light-emitting device.

[0080] The other similarities between the light emitting device provided in this embodiment and the first embodiment are not repeated here, and the difference lies in that: two or more symmetrically arranged third channels 230 are provided as newly added color temperature adjustment channels, and the first channel 210 and the second channel 220 are sequentially arranged on both sides of the third channel 230. It can be understood that the first channel 210 and the second channel 220 can be symmetrically distributed on both sides of the third channel 230, or can be asymmetrically distributed on both sides of the third channel 230. Figure 6 Shown is a schematic diagram of the top structure of the light-emitting device provided in this embodiment. The specific structure of the light-emitting device is as follows: the center of the self-luminous device is the first channel 210, and the second channel 220, the third channel 230, the first channel 210, the second channel 220, the second channel 210 and the second channel 220 are arranged in sequence on both sides of the channel. It can be understood that the arrangement positions of the first channel 210 and the second channel 220 can be swapped with each other. The first channel 210 and the second channel 220 are color temperature parameters of two endpoints. Swapping the positions does not affect the overall light brightness and color temperature. Lead electrodes for controlling the three circuit channels are respectively provided on the substrate 100, and the light-emitting unit 300 is connected to the corresponding lead electrodes through wires, so as to realize independent control of the color temperature by the three circuit channels, and jointly adjust the light emission requirements of the white light source so that the light can be accurately controlled to the standard color temperature arc. Figure 6The structure shown is taken as an example. When the first channel is a cool white light (Cool White) channel, the circuit is connected to the C+ and C- electrodes. When the second channel 220 is a warm white light (Warm White) channel, the circuit is connected to the W+ and W- electrodes. When the upper and lower third channels 230 are cyan light (Cyan Green) channels, the circuit is connected to the G+ and G- electrodes. It can be understood that the upper and lower third channels 230 can also be light yellow. For the light emitting device structure provided in this embodiment, the color temperature value range of the three channels is the same as that of the first embodiment, and will not be repeated here.

[0081] In an optional embodiment, for a light-emitting device having two or more third channels 230, the arrangement of the light-emitting units 300 in its circuit can be adjusted according to actual needs. For example, it can be the vertical arrangement provided in embodiment 1, or it can be the same horizontal arrangement as the first channel 210 and the second channel 220, which will not be described in detail here.

[0082] It is understandable that for a light-emitting device of a larger size, three, four or more third channels 230 may be provided to meet the color temperature adjustment requirements, and the arrangement and number of the first channel 210 and the second channel 220 are also optimized or increased accordingly. The third channels 230 are relatively evenly distributed in the solid crystal area of ​​the light-emitting device, and are arranged in an interlaced manner with the first channel 210 and the second channel 220 to achieve uniform color of the light emitted by the light-emitting device as a whole, and further improve the light emission quality of the product.

[0083] Embodiment three:

[0084] This embodiment provides a light-emitting device, which includes the light-emitting device provided in the first or second embodiment, and can be different products such as stage lights, spotlights, lighting lamps, backlight display panels, etc. The light-emitting device also has the above-mentioned good technical effects, and the color temperature of the light emitted can meet the higher requirements of random adjustment within the full color gamut of Energy Star.

[0085] In summary, the light-emitting device and light-emitting equipment provided by the present application effectively overcome various shortcomings in the prior art and have high industrial utilization value.

[0086] The above embodiments are merely illustrative of the principles and effects of the present application and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.

Claims

1. A light emitting device, characterized in that: At least: A substrate having an upper surface and a lower surface arranged opposite to each other, wherein a crystal-fixing area is arranged on the upper surface; A plurality of light-emitting units are mounted at intervals in the die-bonding region of the substrate and are electrically connected to the substrate through a circuit layer; wherein: The circuit layer includes at least three circuit channels, each of which is independently controlled and includes at least one light-emitting unit; there is a minimum distance L between adjacent light-emitting units, 200 μm≤L≤600 μm.

2. The light emitting device according to claim 1, characterized in that: A light conversion layer is disposed above the light emitting unit, so that the circuit channel emits light with several different color temperatures, including at least a first color temperature, a second color temperature and a third color temperature.

3. The light emitting device according to claim 2, characterized in that: The light conversion layer above each of the circuit channels has a width D, 500 μm≤D≤1100 μm.

4. The light emitting device according to claim 2, characterized in that: In the CIE chromaticity diagram, The coordinates of the first color temperature are P1(x1, y1); wherein x1≥0.29; y1≥0.285; The coordinates of the second color temperature are P2(x2, y2); wherein x2≤0.567; y2≤0.414; The coordinates of the third color temperature are P3(x3, y3); wherein x3≥0.305; and y3≤0.

53.

5. The light emitting device according to claim 2, characterized in that: In the CIE chromaticity diagram, The coordinates of the first color temperature are Q1(x1, y1); wherein x1≥0.238; y1≥0.316; The coordinates of the second color temperature are Q2(x2, y2); wherein x2≤0.521; y2≤0.474; The coordinates of the third color temperature are Q3(x3, y3); wherein x3≤0.435; and y3≥0.

255.

6. The light emitting device according to claim 4 or 5, characterized in that: The current ratio of the first color temperature channel to the second color temperature channel is between 5% and 100%; the current ratio of the third color temperature channel is between 5% and 40%.

7. The light emitting device according to claim 1, characterized in that: The color temperature range of the light emitted by the light emitting device is between 1800K and 8000K.

8. The light emitting device according to claim 1, characterized in that: The material of the substrate includes one or more combinations of metal, ceramic or silicon dioxide.

9. The light emitting device according to claim 1, characterized in that: Each of the circuit channels has at least two light-emitting units connected in series and / or at least one group of light-emitting units connected in parallel.

10. A light emitting device, characterized in that: The light-emitting device comprises the light-emitting apparatus according to any one of claims 1 to 9.

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