Light source module, lamp and lighting system

Abstract

The embodiment of the utility model discloses a light source module, a lamp and a lighting system, and relates to the technical field of electronics. The light source module comprises a first light emitting unit used for emitting controlled first color temperature white light; the second light emitting unit is used for emitting controlled second color temperature white light; the third light emitting unit is used for emitting controlled first color light; and the fourth light emitting unit is used for emitting controlled second color light, the first color temperature white light, the second color temperature white light, the first color light and the second color light are used for light mixing to obtain target color temperature white light, the first color light is long-wave red light, and the second color light is yellow-green light. According to the light source module, the lamp and the lighting system, the color band range of the target color temperature white light can be expanded, meanwhile, the color deviation of the target color temperature white light is reduced, and the overall light quality is improved.

Description

Light source modules, luminaires and lighting systems Technical Field

[0001] This application belongs to the field of electronic technology, specifically relating to a light source module, a lamp, and a lighting system. Background Technology

[0002] In related technologies, full-spectrum luminaires can use bicolor-temperature white light mixing to obtain tunable color-temperature white light. The color wavelength of tunable color-temperature white light is mainly distributed between 400-660nm. To further expand the range of color wavelengths covered by tunable color-temperature white light, longer wavelength red light (650-750nm) can be added to the tunable color-temperature white light. However, when using bicolor-temperature white light for mixing, when the bicolor-temperature white light is mixed to the intermediate color temperature, the color of the tunable color-temperature white light already has a certain color deviation from the standard light source, and the color rendering quality has already decreased. If longer wavelength red light is added further, the overall emitted color will gradually become redder, the color deviation value will become larger and larger, and the overall light quality will further decrease. Summary of the Invention

[0003] This application aims to provide a light source module, luminaire, and lighting system to at least solve or partially solve the aforementioned technical problems.

[0004] In a first aspect, embodiments of this application provide a light source module, the light source module comprising:

[0005] The first light-emitting unit is used to emit controlled white light with a first color temperature;

[0006] The second light-emitting unit is used to emit controlled white light with a second color temperature;

[0007] The third light-emitting unit is used to emit controlled first-color light;

[0008] The fourth light-emitting unit is used to emit controlled second-color light;

[0009] The first color temperature white light, the second color temperature white light, and the first colored light are used to mix the light to obtain the target color temperature white light. The first colored light is long-wavelength red light, and the second colored light is yellow-green light.

[0010] Secondly, embodiments of this application provide a light source module, including: a first light source module and a second light source module.

[0011] The first light source module includes:

[0012] The first light-emitting unit is used to emit controlled white light with a first color temperature;

[0013] The second light-emitting unit is used to emit controlled white light with a second color temperature;

[0014] The fourth light-emitting unit is used to emit controlled second-color light;

[0015] The second light source module includes:

[0016] The third light-emitting unit is used to emit controlled first-color light;

[0017] The first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are used to mix light to obtain the target color temperature white light. The first colored light is long-wavelength red light, and the second colored light is yellow-green light. The first light source module and the second light source module are independent of each other.

[0018] Thirdly, embodiments of this application provide a lighting fixture, including:

[0019] The light source module described in the first aspect of the embodiments of this application; or

[0020] The light source module described in the second aspect of the embodiments of this application.

[0021] Fourthly, embodiments of this application provide a lighting system, including:

[0022] The light source module described in the first aspect of the embodiments of this application; or

[0023] The light source module described in the second aspect of the embodiments of this application.

[0024] The light source module, lamp, and lighting system provided in this application embodiment add a third and a fourth light-emitting unit to the first and second light-emitting units. The third light-emitting unit emits a first colored light, which is long-wavelength red light, and the fourth light-emitting unit emits a second colored light, which is yellow-green light. The first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are mixed together to obtain target color temperature white light. This can expand the color wavelength range of the target color temperature white light while reducing the color deviation of the target color temperature white light and improving the overall light quality.

[0025] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic diagram of the structure of a light source module provided in some embodiments of this application.

[0028] Figure 2 is a schematic diagram of the mixing of dual-color temperature white light and long-wavelength red light in related technologies.

[0029] Figure 3 is a schematic diagram of the mixing of dual-color temperature white light, long-wave red light and yellow-green light provided in some embodiments of this application;

[0030] Figure 4 is a schematic diagram of the color coordinate range of the second colored light provided in some embodiments of this application;

[0031] Figure 5 is a schematic diagram of the structure of a light source module provided in some embodiments of this application;

[0032] Figure 6 is a schematic diagram of the power ratio determination process provided in some embodiments of this application;

[0033] Figure 7 is a schematic diagram of the fitting curve of the initial power ratio of the first color temperature white light and the target color temperature provided in some embodiments of this application;

[0034] Figure 8 is a schematic diagram of the structure of a light source module provided in some embodiments of this application;

[0035] Figure 9 is a schematic diagram of the packaging of a light-emitting unit in a light source module provided in some embodiments of this application;

[0036] Figure 10 is a schematic diagram of another packaging of the light-emitting unit in the light source module provided in some embodiments of this application;

[0037] Figure 11 is another packaging schematic diagram of the light-emitting unit in the light source module provided in some embodiments of this application;

[0038] Figure 12 is a schematic diagram of the structure of a lamp provided in some embodiments of this application;

[0039] Figure 13 is a schematic diagram of the structure of a lighting system provided in some embodiments of this application. Detailed Implementation

[0040] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0041] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0042] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0043] The light source module, lamp, and lighting system provided in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0044] Figure 1 is a schematic diagram of the structure of a light source module provided in some embodiments of this application. As shown in Figure 1, in some embodiments of this application, the light source module 100 includes:

[0045] The first light-emitting unit 110 is used to emit controlled white light with a first color temperature;

[0046] The second light-emitting unit 120 is used to emit controlled white light with a second color temperature;

[0047] The third light-emitting unit 130 is used to emit controlled first colored light;

[0048] The fourth light-emitting unit 140 is used to emit controlled second-color light;

[0049] Among them, the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are used to mix the light to obtain the target color temperature white light. The first colored light is long-wavelength red light, and the second colored light is yellow-green light.

[0050] In the above embodiments, the light source module 100 includes: a first light-emitting unit 110, a second light-emitting unit 120, a third light-emitting unit 130, and a fourth light-emitting unit 140. Based on the traditional dual-color temperature white light-emitting unit, it further adds a third light-emitting unit and a fourth light-emitting unit. The third light-emitting unit can emit controlled first colored light, which is long-wavelength red light. The fourth light-emitting unit can emit controlled second colored light, which is yellow-green light. The first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are mixed together to obtain target color temperature white light. This can expand the color wavelength range of the target color temperature white light while reducing the color deviation of the target color temperature white light and improving the overall light quality.

[0051] Figure 2 is a schematic diagram of light mixing of dual-color-temperature white light and long-wavelength red light in related technologies. Figure 3 is a schematic diagram of light mixing of dual-color-temperature white light, long-wavelength red light, and yellow-green light provided in some embodiments of this application. As shown in Figure 2, in related technologies, when white light 1, white light 2, and long-wavelength red light are mixed, the color coordinates of the target color-temperature white light obtained by mixing deviate from the blackbody radiation line, resulting in a large color deviation and poor light quality. As shown in Figure 3, based on the light source module provided in the embodiments of this application, white light 1, white light 2, long-wavelength red light, and colored light x are used for light mixing. Colored light x is yellow-green light, which can perform color compensation during light mixing, adjusting the color coordinates of the target color-temperature white light obtained by mixing towards the blackbody radiation line, reducing the color deviation of the target color-temperature white light, and improving the light quality of the target color-temperature white light.

[0052] Table 1 below compares the light quality parameters of four-color mixing (first color temperature white light, second color temperature white light, second color temperature white light, first colored light, and second colored light) based on the light source module provided in the embodiments of this application with those of traditional two-color temperature white light mixing. As can be seen from Table 1, compared to traditional two-color temperature white light mixing, the four-color mixing (first color temperature white light, second color temperature white light, second color temperature white light, first colored light, and second colored light) based on the light source module provided in the embodiments of this application exhibits superior color deviation (DUV), color rendering index (CRI), special color rendering indices (R9, R12), and spectral fit (SFR), resulting in better light quality.

[0053] Table 1

[0054]

[0055]

[0056] In the above embodiments, the first color temperature white light can be an appropriate low color temperature white light, the second color temperature white light can be an appropriate high color temperature white light, the first colored light can be an appropriate long-wave red light, and the second colored light can be an appropriate yellow-green light.

[0057] In some embodiments, the first color temperature white light can be any white light within the following color temperature range: 2500K to 3500K.

[0058] For example, the first color temperature white light can be 2500K white light, 3000K white light, or 3500K white light.

[0059] The second color temperature white light can be any white light within the following color temperature range: 5000K~7000K.

[0060] For example, the second color temperature white light can be 5000K white light, 6000K white light, or 7000K white light.

[0061] The first colored light can be long-wave red light with a peak wavelength in the range of 660nm-690nm, or long-wave red light synthesized from long-wave red light with a peak wavelength in the range of 660nm-690nm and one or more long-wave red lights with a peak wavelength in any of the following ranges: 690nm-720nm; 720nm-740nm.

[0062] For example, the first colored light can be long-wavelength red light with a peak wavelength in the range of 660nm-690nm. The first colored light can also be a long-wavelength red light synthesized from long-wavelength red light with a peak wavelength in the range of 660nm-690nm and long-wavelength red light with a peak wavelength in the range of 690nm-720nm. The first colored light can also be a long-wavelength red light synthesized from long-wavelength red light with a peak wavelength in the range of 660nm-690nm and long-wavelength red light with a peak wavelength in the range of 720nm-740nm. The first colored light can also be a long-wavelength red light synthesized from long-wavelength red light with a peak wavelength in the range of 660nm-690nm, long-wavelength red light with a peak wavelength in the range of 690nm-720nm, and long-wavelength red light with a peak wavelength in the range of 720nm-740nm.

[0063] The second color light is the yellow-green light of any color coordinate within the quadrilateral color coordinate region defined by the following four color coordinates on the CIE 1931 chromaticity diagram: first color coordinate (Cx: 0.338, Cy: 0.544), second color coordinate (Cx: 0.329, Cy: 0.585), third color coordinate (Cx: 0.451, Cy: 0.522), and fourth color coordinate (Cx: 0.442, Cy: 0.503).

[0064] For example, the second colored light can be yellow-green light with color coordinates at any point in the quadrilateral region enclosed by A, B, C, and D in Figure 4. Specifically, the color coordinates of A are the first color coordinates (Cx: 0.338, Cy: 0.544), the color coordinates of B are the second color coordinates (Cx: 0.329, Cy: 0.585), the color coordinates of C are the third color coordinates (Cx: 0.451, Cy: 0.522), and the color coordinates of D are the fourth color coordinates (Cx: 0.442, Cy: 0.503).

[0065] The conditions for the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light described above are optimal conditions obtained through testing. When the first colored light is long-wavelength red light containing at least a peak wavelength in the range of 660nm-690nm, and the second colored light is yellow-green light with color coordinates within any of the four-sided regions defined by the first color coordinates (Cx: 0.338, Cy: 0.544), the second color coordinates (Cx: 0.329, Cy: 0.585), the third color coordinates (Cx: 0.451, Cy: 0.522), and the fourth color coordinates (Cx: 0.442, Cy: 0.503), a target color temperature white light with high light quality can be obtained.

[0066] In the above embodiments, the power ratios of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light can be configured to an appropriate ratio so that the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are mixed to obtain the target color temperature white light. The power ratios of the first color temperature white light, the second color temperature white light, the second color temperature white light, the first colored light, and the second colored light can be determined based on the light color parameters of the target color temperature white light and the light color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light. The power ratios of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light can be achieved by controlling the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit.

[0067] In some embodiments, as shown in FIG5, the light source module 100 further includes a control unit 150.

[0068] Control unit 150 is used for:

[0069] Based on the color parameters of the target color temperature white light and the color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light, calculate the power ratio of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light;

[0070] Based on the power ratio of the first color temperature white light, the first light-emitting unit is controlled to emit controlled first color temperature white light;

[0071] Based on the power ratio of the second color temperature white light, the second light-emitting unit is controlled to emit controlled second color temperature white light;

[0072] Based on the power ratio of the first colored light, the third light-emitting unit is controlled to emit controlled first colored light;

[0073] Based on the power ratio of the second colored light, the fourth light-emitting unit is controlled to emit controlled second colored light.

[0074] By calculating the power ratios of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light based on the light color parameters of the target color temperature white light and the light color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light, and based on the power ratio of the first color temperature white light, the first light-emitting unit is controlled to emit controlled first color temperature white light; based on the power ratio of the second color temperature white light, the second light-emitting unit is controlled to emit controlled second color temperature white light; based on the power ratio of the first colored light, the third light-emitting unit is controlled to emit controlled first colored light; and based on the power ratio of the second colored light, the fourth light-emitting unit is controlled to emit controlled second colored light. This allows the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light to be mixed according to their respective power ratios to obtain the target color temperature white light, thereby improving the light quality of the target color temperature white light.

[0075] In the above embodiments, the target color temperature white light is adjustable color temperature white light. The power ratio of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light can change with the color parameters of the target color temperature white light. The target color temperature and brightness of the target color temperature white light can be selected by the user, and the color information of the target color temperature white light can be generated based on the target color temperature and brightness selected by the user.

[0076] In some embodiments, the control unit 150 is further configured to:

[0077] Receive target color temperature white light information; the target color temperature white light information is generated and sent by the user terminal device according to the target color temperature and brightness selected by the user.

[0078] Based on the target color temperature white light information, the light color parameters of the target color temperature white light are obtained.

[0079] The user terminal device can be a device for user use, such as a lighting remote control. This user terminal device is communicatively connected to the control unit 150. The target color temperature white light information carries the target color temperature. The user can select the desired color temperature and brightness on the user terminal device. Based on the user's color temperature and brightness selection, the user terminal device can determine the user-selected color temperature as the target color temperature and the user-selected brightness as the target brightness, and send this target color temperature white light information to the control unit 150.

[0080] The control unit 150 can receive target color temperature white light information and obtain the light color parameters of the target color temperature white light based on the target color temperature and brightness carried in the target color temperature white light information.

[0081] After obtaining the color parameters of the target color temperature white light, the control unit 150 can calculate the power ratio of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light based on the color parameters of the target color temperature white light and the color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light. Based on the power ratio of the first color temperature white light, the control unit 150 controls the first light-emitting unit to emit controlled first color temperature white light; based on the power ratio of the second color temperature white light, the control unit controls the second light-emitting unit to emit controlled second color temperature white light; based on the power ratio of the first colored light, the control unit controls the third light-emitting unit to emit controlled first colored light; and based on the power ratio of the second colored light, the control unit controls the fourth light-emitting unit to emit controlled second colored light. Thus, the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are mixed to obtain the target color temperature white light that meets the user's needs.

[0082] In the above embodiments, the power ratio of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light can be calculated based on the light color parameters of the target color temperature white light and the light color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light, using an appropriate method.

[0083] In some embodiments, the color parameters of the target color temperature white light may include: color temperature and brightness; the color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light may include: color coordinates and brightness.

[0084] As shown in Figure 6, based on the color parameters of the target color temperature white light and the color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light, the power ratio of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light is calculated, specifically including the following processing:

[0085] S101, based on the color temperature of the target color temperature white light, determine the initial power ratio of the first color temperature white light and the initial power ratio of the second color temperature white light.

[0086] S102, based on the initial power ratio of the first color temperature white light, the initial power ratio of the second color temperature white light, the color coordinates and luminance of the first color temperature white light, and the color coordinates and luminance of the second color temperature white light, determine the color coordinates and luminance of the initial mixed white light.

[0087] S103, based on the color temperature and brightness of the target color temperature white light, as well as the color coordinates and brightness of the initial mixed white light, the color coordinates and brightness of the first colored light, and the color coordinates and brightness of the second colored light, determine the power ratio of the initial mixed white light, the power ratio of the first colored light, and the power ratio of the second colored light.

[0088] S104, based on the initial power ratio of the mixed white light and the initial power ratio of the first color temperature white light and the initial power ratio of the second color temperature white light, determine the power ratio of the first color temperature white light and the power ratio of the first color temperature white light.

[0089] In the above embodiments, by first determining the initial power ratio of the first color temperature white light and the second color temperature white light based on the color temperature of the target color temperature white light, and then determining the light color parameters of the initial mixed white light based on the initial power ratio of the first color temperature white light and the second color temperature white light, the power ratio can be calculated based on the light color parameters of the target color temperature white light, the light color parameters of the initial mixed white light, and the light color parameters of the first color light and the second color light. This can reduce the dimensionality of the power ratio calculation and improve the calculation speed of the power ratio.

[0090] In the above embodiments, the sum of the initial power ratio of the first color temperature white light and the initial power ratio of the second color temperature white light can be 1. The initial power ratio of the second color temperature white light can be equal to: 1 - the initial power ratio of the first color temperature white light. The power ratio of the first color temperature white light can be equal to the power ratio of the initial mixed white light multiplied by the initial power ratio of the first color temperature white light, and the power ratio of the second color temperature white light can be equal to the power ratio of the initial mixed white light multiplied by the initial power ratio of the second color temperature white light.

[0091] The initial power ratio of the first color temperature white light can be obtained based on the color temperature of the target color temperature white light and the mapping relationship between the measured power ratio of the first color temperature white light and the color temperature of the target color temperature white light with high light quality.

[0092] In some embodiments, considering the inexhaustibility of testing, a model can be built based on the mapping relationship between the power ratio of the first color temperature white light obtained from the test and the color temperature of the target color temperature white light, establishing a first initial ratio calculation function. This first initial ratio calculation function is used to calculate the power ratio of the first color temperature white light based on the color temperature of the target color temperature white light. The initial power ratio of the first color temperature white light can be calculated based on the color temperature of the target color temperature white light and the first initial ratio calculation function.

[0093] In the above process S101, the initial power ratio of the first color temperature white light and the second color temperature white light is determined based on the color temperature of the target color temperature white light, including the following processing:

[0094] The initial power ratio of the first color temperature white light is calculated based on the color temperature of the target color temperature white light and the first initial ratio calculation function.

[0095] The first initial ratio calculation function is used to calculate the power ratio of the first color temperature white light based on the color temperature of the target color temperature white light. It is modeled based on the mapping relationship between the power ratio of the first color temperature white light obtained from the test and the color temperature of the target color temperature white light.

[0096] For example, the first initial ratio calculation function is Rt_W1 = f(CCT_tar), where Rt_W1 represents the power ratio of the first color temperature white light and CCT_tar represents the color temperature of the target color temperature white light. The color temperature of the target color temperature white light can be substituted into the first initial ratio calculation function to calculate the power ratio of the first color temperature white light. The calculated power ratio is then determined as the initial power ratio of the first color temperature white light.

[0097] The initial power ratio of the second color temperature white light is determined based on the initial power ratio of the first color temperature white light.

[0098] For example, the initial power ratio of the first color temperature white light is Rt_W1 = f(CCT_tar), and the power ratio of the second color temperature white light is Rt_W2 = 1 - f(CCT_tar).

[0099] After determining the initial power ratio of the first color temperature white light and the initial power ratio of the second color temperature white light, in the above-mentioned process S102, based on the principle of two-color mixing, according to the initial power ratio of the first color temperature white light, the initial power ratio of the second color temperature white light, the color coordinates and luminance of the first color temperature white light, and the color coordinates and luminance of the second color temperature white light, the color coordinates and luminance of the mixed white light obtained by two-color mixing of the first color temperature white light and the second color temperature white light can be calculated. This mixed white light is the initial mixed white light, and the color coordinates and luminance of this mixed white light are the color coordinates and luminance of the initial mixed white light.

[0100] After obtaining the color coordinates and brightness of the initial mixed white light, in the above-mentioned processing S103, based on the three-color mixing principle, according to the color temperature and brightness of the target color temperature white light, as well as the color coordinates and brightness of the initial mixed white light, the color coordinates and brightness of the first colored light, and the color coordinates and brightness of the second colored light, the required power ratio of the initial mixed white light, the power ratio of the first colored light, and the power ratio of the second colored light to mix the initial mixed white light, the first colored light, and the second colored light into the target color temperature white light can be calculated.

[0101] In the above process S104, the power ratio of the initial mixed white light can be multiplied by the initial power ratio of the first color temperature white light to obtain the power ratio of the first color temperature white light. The power ratio of the initial mixed white light can be multiplied by the initial power ratio of the second color temperature white light to obtain the power ratio of the second color temperature white light.

[0102] After the above processing, the control unit 150 can obtain the power ratio of the first color temperature white light, the power ratio of the second color temperature white light, the power ratio of the third color temperature white light, and the power ratio of the fourth color temperature white light required to mix the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light to the target color temperature white light.

[0103] Subsequently, the control unit 150 can control the first light-emitting unit 110 to emit white light of the first color temperature based on the power ratio of the first color temperature white light, control the second light-emitting unit 120 to emit white light of the second color temperature based on the power ratio of the second color temperature white light, control the third light-emitting unit 130 to emit first colored light based on the power ratio of the first colored light, and control the fourth light-emitting unit 140 to emit second colored light based on the power ratio of the second colored light, so that the mixture of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light is the target color temperature white light.

[0104] In the above embodiments, the initial power ratio of the first color temperature white light and the second color temperature white light is calculated based on a first initial ratio calculation function. The first initial ratio calculation function is obtained by modeling the mapping relationship between the initial power ratio of the tested first color temperature white light and the color temperature of the target color temperature white light.

[0105] In some embodiments, in order to obtain an initial power ratio that can improve the light quality of the target color temperature white light, a four-color mixing test can be performed on the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light to obtain the mapping relationship between the different color temperatures of the target color temperature white light with higher light quality and the power ratio of the first color temperature white light corresponding to the different color temperatures. The mapping relationship between the color temperature of the target color temperature white light with higher light quality and the power ratio of the first color temperature white light is fitted to obtain the first initial ratio calculation function.

[0106] For example, a four-color mixing test of white light with a first color temperature, white light with a second color temperature, first colored light, and second colored light can be performed under the light-emitting unit conditions shown in Tables 2, 3, and 4 below.

[0107] Table 2

[0108]

[0109] Table 3

[0110]

[0111] Table 4

[0112]

[0113]

[0114] Based on the above light-emitting unit conditions, a four-color mixing test was conducted on white light W1, white light W2, long-wavelength red light DR, and colored light GY1. The power ratio of the first color temperature white light and the test data of the color temperature of the target color temperature white light with high light quality are shown in Table 5 below.

[0115]

[0116]

[0117]

[0118] In the table above, the target color temperature is the color temperature of white light at the target color temperature, W1 initial power ratio represents the initial power ratio of white light at the first color temperature, W1 power ratio represents the power ratio of white light at the first color temperature, W2 power ratio represents the power ratio of white light at the second color temperature, DR power ratio represents the power ratio of the first colored light, and GY1 power ratio represents the power ratio of the second colored light. The mapping relationship between the above initial power ratio W1 and the target color temperature is fitted, and the fitted curve is shown in Figure 7. The fitting function corresponding to this fitted curve can be determined as the first initial ratio calculation function.

[0119] The first initial scaling function is, for example:

[0120] Rt W1 =f(CCT_tar) = -8E-12*CCT tar 3 +2E-07*CCT tar 2 -0.0011*CCT tar +3.15

[0121] The first initial ratio calculation function obtained by the above method is used to calculate the initial power ratio of the first color temperature white light, which can further improve the light quality of the target color temperature white light.

[0122] In the above embodiments, the color parameters of the target color temperature white light are color temperature and luminance, while the color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are chromaticity coordinates and luminance. It is understood that color parameters of different dimensions can be converted to each other. If the color parameters of the target color temperature white light are not color temperature and luminance, they can be converted to color temperature and luminance. Similarly, if the color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are not chromaticity coordinates and luminance, they can be converted to chromaticity coordinates and luminance.

[0123] In the above embodiments, the first color temperature white light is any white light within the following color temperature range: 2500K~3500K; the second color temperature white light is any white light within the following color temperature range: 5000K~7000K; the first colored light is long-wavelength red light with a peak wavelength in the range of 660nm-690nm or long-wavelength red light with a peak wavelength in the range of 660nm-690nm combined with one or more long-wavelength red lights with a peak wavelength in any of the following ranges: 690nm-720nm. 0nm; 720nm-740nm; The second color light is the yellow-green light of any color coordinate within the quadrilateral color coordinate region defined by the following four color coordinates on the CIE 1931 chromaticity diagram: first color coordinate (Cx: 0.338, Cy: 0.544), second color coordinate (Cx: 0.329, Cy: 0.585), third color coordinate (Cx: 0.451, Cy: 0.522), and fourth color coordinate (Cx: 0.442, Cy: 0.503).

[0124] The first light-emitting unit 110, the second light-emitting unit 120, the third light-emitting unit 130, and the fourth light-emitting unit 140 are light-emitting units capable of emitting the aforementioned corresponding light.

[0125] The aforementioned first colored light is long-wavelength red light that includes at least long-wavelength red light with a peak wavelength in the range of 660nm-690nm. It can be long-wavelength red light with a peak wavelength in the range of 660nm-690nm, or it can be long-wavelength red light synthesized from long-wavelength red light with a peak wavelength in the range of 660nm-690nm and long-wavelength red light with a peak wavelength in the range of 720nm-740nm. The first colored light can also be long-wavelength red light synthesized from long-wavelength red light with a peak wavelength in the range of 660nm-690nm, long-wavelength red light with a peak wavelength in the range of 690nm-720nm, and long-wavelength red light with a peak wavelength in the range of 720nm-740nm.

[0126] In other words, the first colored light can be RC1, RC1+RC2, RC1+RC3, or RC1+RC2+RC3. Here, RC1 represents long-wavelength red light with a peak wavelength in the range of 660nm-690nm, RC2 represents long-wavelength red light with a peak wavelength in the range of 690nm-720nm, and RC3 represents long-wavelength red light with a peak wavelength in the range of 720nm-740nm.

[0127] Accordingly, the third light-emitting unit 130 may include a red LED chip, which may include one or more red LED chips, but at least includes a first red LED chip. The red LED chip may include a first red LED chip, or it may include a first red LED chip and a second red LED chip, or it may include a first red LED chip and a third light-emitting chip, or it may include a first red LED chip, a second red LED chip, and a third red LED chip. Specifically, the first red LED chip is used to emit long-wavelength red light with a peak wavelength in the range of 660nm-690nm, the second red LED chip is used to emit long-wavelength red light with a peak wavelength in the range of 690nm-720nm, and the third red LED chip is used to emit long-wavelength red light with a peak wavelength in the range of 720nm-740nm.

[0128] The aforementioned second colored light is yellow-green light with any color coordinate within the quadrilateral region defined by the aforementioned first color coordinates (Cx: 0.338, Cy: 0.544), second color coordinates (Cx: 0.329, Cy: 0.585), third color coordinates (Cx: 0.451, Cy: 0.522), and fourth color coordinates (Cx: 0.442, Cy: 0.503).

[0129] Accordingly, the fourth light-emitting unit 110 may include a yellow-green LED chip whose color coordinates of the emitted yellow-green light include the aforementioned color coordinate range.

[0130] In the above embodiments, the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit can be packaged in a single package.

[0131] Long-wavelength red light falls at the edge of the visible light band (400-700nm). Using a third light-emitting unit to emit long-wavelength red light for mixing will result in lower overall luminous efficiency. In some embodiments, the third light-emitting unit can be packaged separately to improve overall luminous efficiency. Figure 8 is a schematic diagram of the structure of a light source module provided in some embodiments of this application. As shown in Figure 8, in some embodiments of this application, the light source module includes: a first light source module 200 and a second light source module 300.

[0132] The first light source module 200 includes:

[0133] The first light-emitting unit 210 is used to emit controlled white light of a first color temperature;

[0134] The second light-emitting unit 220 is used to emit controlled white light with a second color temperature;

[0135] The fourth light-emitting unit 240 is used to emit controlled second colored light; the second colored light is yellow-green light;

[0136] The second light source module 300 includes:

[0137] The third light-emitting unit 310 is used to emit controlled first colored light; the first colored light is long-wave red light.

[0138] The first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are used for light mixing. The first light source module 200 and the second light source module 300 are independent of each other.

[0139] In the above embodiments, the first light source module 200 and the second light source module 300 are independent of each other. The third light-emitting unit is respectively arranged in the two light source modules along with the first light-emitting unit, the second light-emitting unit, and the fourth light-emitting unit, which can improve the luminous efficiency.

[0140] In the above embodiments, light-emitting units belonging to the same light source module can be packaged together. For example, as shown in the left figure of Figure 9, the light-emitting units of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light all belong to one light source module and can be packaged in one package. As shown in the right figure of Figure 9, the light-emitting units of the first color temperature white light, the second color temperature white light, and the second colored light belong to one light source module and can be packaged in one package, while the light-emitting unit of the first colored light belongs to another light source module and can be packaged in another package. Of course, in other embodiments, the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit can also be packaged separately. The packaging method includes, but is not limited to, bracketed packaging and bracketless packaging, as shown in Figures 10 and 11.

[0141] In the above embodiments, the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit perform four-color mixing of white light at a first color temperature, white light at a second color temperature, first colored light, and second colored light. This can be achieved using a PWM modulation dimming method. By controlling the power ratio of each light-emitting unit, the mixing can be controlled to ensure that the light quality of the resulting target color temperature mixed white light meets the light quality requirements. For example, the color tolerance of the target color temperature mixed white light can be kept within the color tolerance range, and the spectral fit between the target color temperature mixed white light and the standard light source spectrum can be greater than the spectral fit threshold.

[0142] Based on the same technical concept, this application also provides a lamp. Figure 12 is a structural schematic diagram of the lamp according to an embodiment of this application. As shown in Figure 12, the lamp 400 according to an embodiment of this application includes:

[0143] The light source module 100 as shown in Figure 1, or the first light source module 200 and the second light source module 300 as shown in Figure 8.

[0144] The lamp 400 according to the embodiments of this application can expand the color wavelength range of adjustable color temperature white light while reducing the color deviation of adjustable color temperature white light and improving the light quality of adjustable color temperature white light. The specific structure can be referred to the foregoing embodiments, and will not be repeated here.

[0145] Based on the same technical concept, this application also provides a lighting system. Figure 13 is a schematic diagram of the structure of the lighting system according to an embodiment of this application. As shown in Figure 13, the lighting system 500 according to an embodiment of this application includes:

[0146] The light source module 100 shown in Figure 1, or the first light source module 200 and the second light source module 300 shown in Figure 8.

[0147] The lighting system 500 according to the embodiments of this application can reduce the color deviation of the adjustable color temperature white light and improve the light quality of the adjustable color temperature white light while expanding the color wavelength range of the adjustable color temperature white light. The specific structure can be referred to the foregoing embodiments, and will not be repeated here.

[0148] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0149] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A light source module, characterized in that, The light source module includes: a first light-emitting unit for emitting controlled white light at a first color temperature; a second light-emitting unit for emitting controlled white light at a second color temperature; a third light-emitting unit for emitting controlled first colored light; and a fourth light-emitting unit for emitting controlled second colored light. The first color-temperature white light, the second color-temperature white light, the first colored light, and the second colored light are mixed to obtain a target color-temperature white light. The first colored light is long-wavelength red light, and the second colored light is yellow-green light.

2. The light source module according to claim 1, characterized in that, The first color temperature white light is any white light within the following color temperature range: 2500K~3500K; the second color temperature white light is any white light within the following color temperature range: 5000K~7000K; the first colored light is long-wavelength red light with a peak wavelength in the range of 660nm-690nm, or long-wavelength red light with a peak wavelength in the range of 660nm-690nm combined with one or more long-wavelength red lights with a peak wavelength in any of the following ranges: 690nm-720nm; 720nm-740nm; the second colored light is yellow-green light at any color coordinate within the quadrilateral color coordinate region defined by the following four color coordinates on the CIE 1931 chromaticity diagram: first color coordinate (Cx: 0.338, Cy: 0.544), second color coordinate (Cx: 0.329, Cy: 0.585), third color coordinate (Cx: 0.451, Cy:0.522), fourth color coordinates (Cx:0.442, Cy:0.503).

3. The light source module according to claim 1, characterized in that, The light source module further includes a control unit; the control unit is used to: calculate the power ratio of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light based on the light color parameters of the target color temperature white light and the light color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light; control the first light-emitting unit to emit controlled first color temperature white light based on the power ratio of the first color temperature white light; control the second light-emitting unit to emit controlled second color temperature white light based on the power ratio of the second color temperature white light; control the third light-emitting unit to emit the controlled first colored light based on the power ratio of the first colored light; and control the fourth light-emitting unit to emit the controlled second colored light based on the power ratio of the second colored light.

4. The light source module according to claim 3, characterized in that, The control unit is further configured to: receive target color temperature white light information; the target color temperature white light information is generated and sent by the user terminal device according to the target color temperature and brightness selected by the user; and obtain the light color parameters of the target color temperature white light based on the target color temperature white light information.

5. The light source module according to claim 3, characterized in that, The color parameters of the target color temperature white light include: color temperature and brightness. The color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light include: color coordinates and brightness. The calculation of the power ratios of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light based on the color parameters of the target color temperature white light and the color parameters of the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light includes: determining the initial power ratio of the first color temperature white light and the initial power ratio of the second color temperature white light based on the color temperature of the target color temperature white light; and based on the initial power ratios of the first color temperature white light and the second color temperature white light... The color coordinates and luminance of the first color temperature white light and the second color temperature white light are used to determine the color coordinates and luminance of the initial mixed white light. Based on the color temperature and luminance of the target color temperature white light, the color coordinates and luminance of the initial mixed white light, the color coordinates and luminance of the first colored light, and the color coordinates and luminance of the second colored light, the power ratio of the initial mixed white light, the power ratio of the first colored light, and the power ratio of the second colored light are determined. Based on the power ratio of the initial mixed white light, the initial power ratio of the first color temperature white light, and the initial power ratio of the second color temperature white light, the power ratio of the first color temperature white light and the power ratio of the first color temperature white light are determined.

6. The light source module according to claim 5, characterized in that, The step of determining the initial power ratio of the first color temperature white light and the initial power ratio of the second color temperature white light based on the color temperature of the target color temperature white light includes: calculating the initial power ratio of the first color temperature white light based on the color temperature of the target color temperature white light and a first initial ratio calculation function; wherein, the first initial ratio calculation function is used to calculate the power ratio of the first color temperature white light based on the color temperature of the target color temperature white light, and it is obtained by modeling the mapping relationship between the power ratio of the first color temperature white light obtained by testing and the color temperature of the target color temperature white light; and determining the initial power ratio of the second color temperature white light based on the initial power ratio of the first color temperature white light.

7. The light source module according to claim 1, characterized in that, The first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the fourth light-emitting unit are packaged in a single package.

8. A light source module, characterized in that, include: A first light source module and a second light source module, the first light source module comprising: a first light-emitting unit for emitting controlled white light at a first color temperature; a second light-emitting unit for emitting controlled white light at a second color temperature; and a fourth light-emitting unit for emitting controlled second colored light; the second colored light being yellow-green light; the second light source module comprising: a third light-emitting unit for emitting controlled first colored light; the first colored light being long-wavelength red light; wherein the first color temperature white light, the second color temperature white light, the first colored light, and the second colored light are used for mixing light to obtain target color temperature white light; the first light source module and the second light source module are independent of each other.

9. A lamp, characterized in that, include: The light source module according to any one of claims 1 to 7; or the light source module according to claim 8.

10. A lighting system, characterized in that, include: The light source module according to any one of claims 1 to 7; or the light source module according to claim 8.

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