CN100590518C - Light source module - Google Patents

Abstract

The invention discloses a light source module which comprises a plurality of first point light sources, a plurality of second point light sources and a plurality of third point light sources. The main light-emitting wavelength of the first point light sources is in the wavelength range of the first color light, and the main light-emitting wavelengths of at least two first point light sources are different, wherein when the temperature of the first point light sources is increased, the main light-emitting wavelengths of part of the first point light sources generate blue shift, and the main light-emitting wavelengths of the rest of the first point light sources generate red shift. In addition, the main light emitting wavelength of the second point light sources is in the wavelength range of the second color light, and the main light emitting wavelengths of at least two second point light sources are different. In addition, the main light-emitting wavelength of the third point light sources is in the wavelength range of the third color light, and the main light-emitting wavelengths of at least two third point light sources are different.

Description

Light source module

technical field

The present invention relates to a light source module, and in particular to a light source module with optimized color rendering index (CRI) and color stability.

Background technique

Fig. 1 is a schematic diagram of a known light source module. Referring to FIG. 1 , a known light source module 100 is suitable for a projection device to provide an illumination beam required by the projection device. The light source module 100 includes a red light emitting diode (red light emitting diode, red LED) 110r, a green light emitting diode 110g, a blue light emitting diode 110b, a reflector 120, two dichroic mirrors (dichroic mirror) 130a, 130b and light integrating Column (light integration rod) 140. In addition, the red light emitting diode 110r, the green light emitting diode 110g and the blue light emitting diode 110b can respectively provide a red light 112r, a green light 112g and a blue light 112b.

Based on the above, the reflector 120 will reflect the red light 112r to the dichroic beam splitter 130b, and the dichroic beam splitter 130b is suitable for passing the red light 112r to the light integrating rod 140 . The dichroic mirror 130 a passes the green light 112 g to the dichroic mirror 130 b, and reflects the blue light 112 b to the dichroic mirror 130 b, and the dichroic mirror 130 b reflects the green light 112 g and the blue light 112 b to the light integrating rod 140 . In addition, the light integrating column 140 can homogenize the red light 112r, the green light 112g and the blue light 112b.

FIG. 2 is a normalization spectrum diagram of red light, blue light and green light provided by a known light source module. Please refer to FIG. 2. It can be seen from FIG. 2 that the wavelengths of the red light 112r, green light 112g, and blue light 112r provided by the known light source module 100 are discontinuous within the wavelength range of visible light, resulting in red light 112r, green light 112g 1. When white light is mixed with blue light 112r, the color rendering coefficient of white light is not good (only between 50-75).

In addition, since the light-emitting wavelength of the light-emitting diode is prone to drift due to the temperature change of the light-emitting diode or the change of the current passing through the light-emitting diode, the color coordinate point of a single color light on the CIE1931 chromaticity diagram (chromaticity diagram) will be inaccurate. The problem is that the color of red light, green light, and blue light mixed with light is unstable. In this way, the imaging quality of the projection device will be affected.

Contents of the invention

An embodiment of the present invention provides a light source module, which includes a plurality of first point light sources, a plurality of second point light sources and a plurality of third point light sources. The dominant wavelength of the first point light sources is within the wavelength range of the first color light, and the dominant wavelengths of at least two first point light sources are different, wherein when the temperature of these first point light sources rises, some The main emission wavelengths of these first point light sources will be blue-shifted, and the main emission wavelengths of the remaining first point light sources will be red-shifted. In addition, the main light emission wavelength of the second point light sources is within the wavelength range of the second color light, and the main light emission wavelengths of at least two second point light sources are different. In addition, the main light emitting wavelength of the third point light sources is within the wavelength range of the third color light, and at least two of the third point light sources have different main light emitting wavelengths.

Another embodiment of the present invention provides a light source module, which includes a plurality of first point light sources, a plurality of second point light sources and a plurality of third point light sources. The main emission wavelengths of the first point light sources are within the wavelength range of red light, and the main emission wavelengths of at least two first point light sources are different, wherein when the temperature of these first point light sources rises, some of these first point light sources The main emission wavelength of the first point light source will produce a blue shift, and the main emission wavelength of the remaining first point light sources will produce a red shift. The main emission wavelength of the second point light source is within the wavelength range of green light, and the main emission wavelengths of at least two second point light sources are different. The main emission wavelength of the third point light sources is within the wavelength range of blue light, and the main emission wavelengths of at least two third point light sources are different. The main emission wavelengths of the two first point light sources are λ ₁₁ and λ ₁₂ respectively, and 4nm≤|λ ₁₂ -λ ₁₁ |≤40nm, the main emission wavelengths of the two second point light sources are λ ₂₁ and λ ₂₂ , and 4nm≤|λ ₂₂ -λ ₂₁ |≤20nm, the main emission wavelengths of the two third point light sources are λ ₃₁ and λ ₃₂ respectively, and 4nm≤|λ ₃₂ -λ ₃₁ |≤30nm.

Still another embodiment of the present invention provides a light source module, which includes a first group of multiple point light sources, the main light emission wavelength of each point light source in the first group is within the wavelength range of the first monochromatic light, and the first group of point light sources There are at least two point light sources with different main emission wavelengths, wherein when the temperature of these first point light sources increases, the main light emission wavelengths of some of these first point light sources will produce blue shifts, and the main light emission wavelengths of the rest of the first point light sources The wavelength produces a red shift.

In the light source module of the present invention, since the point light sources of specific colors have different main light emitting wavelengths, the color rendering coefficient can be improved.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, preferred embodiments are specifically cited below, together with the attached figures, and are described in detail as follows.

Description of drawings

Fig. 1 is a schematic diagram of a known light source module.

FIG. 2 is a normalized spectrum diagram of red light, blue light and green light provided by a known light source module.

FIG. 3 is a schematic diagram of a light source module according to an embodiment of the invention.

FIG. 4A is a normalized spectrum diagram of each point light source in FIG. 3 .

FIG. 4B is a schematic diagram of the corresponding color coordinate points in the CIE1931 chromaticity diagram of the light provided by each point light source in FIG. 3 .

5A and 5B are schematic diagrams of the normalized spectrum diagram of each point light source and the corresponding color coordinate points in the CIE1931 chromaticity diagram of the light provided by each point light source in another embodiment of the present invention.

6A and 6B are schematic diagrams of a light source module according to another embodiment of the present invention.

Fig. 7 is a schematic diagram of a light source module according to another embodiment of the present invention.

Fig. 8 is a schematic diagram of a light source module according to another embodiment of the present invention.

Explanation of reference signs

100, 200, 200a, 200b, 300, 400: light source module

110r: Red Light Emitting Diode

110g: Green LED

110b: blue light emitting diode

112r, 222: red light

112g, 232: green light

112b, 242: Blu-ray

120, 254: reflector

130a, 130b, 256a, 256b: dichroic beam splitters

140: light integrating column

202: Lighting Beam

210, 430: circuit board

220: The first light source group

230: Second light source group

240: The third light source group

250a, 250b: light combining unit

252a, 252b: two-color splitting surface

310: light box

312: Bottom

314: light section

320, 420: point light source

330: diffuser plate

410: light guide plate

412: light incident surface

R1, R2: the first point light source

G1, G2: Second point light source

B1, B2: the third point light source

R1, R2, R3: the first point light source

G1, G2, G3: the second point light source

B1, B2, B3: the third point light source

PR, PR1, PR2, PR3, PG, PG1, PG2, PG3, PB, PB1, PB2, PB3: color coordinate points

Detailed ways

A light source module according to an embodiment of the present invention includes a plurality of first point light sources, a plurality of second point light sources and a plurality of third point light sources. The main light emitting wavelength of the first point light sources is within the wavelength range of the first color light, and the main light emitting wavelengths of at least two first point light sources are different. In addition, the main light emission wavelength of the second point light sources is within the wavelength range of the second color light, and the main light emission wavelengths of at least two second point light sources are different. In addition, the main light emitting wavelength of the third point light sources is within the wavelength range of the third color light, and at least two of the third point light sources have different main light emitting wavelengths.

Based on the above, the light source module of the present invention can be used in general lighting or electronic products (such as projection devices, liquid crystal display devices, etc.) to provide light sources required by electronic products. Embodiments in which the light source module of the present invention is applied to a projection device and a liquid crystal display device will be listed below, but it is not intended to limit the application of the light source module of the present invention. In addition, the first color light, the second color light and the third color light are respectively red light, green light and blue light for description below, but this is not intended to limit the present invention.

Fig. 3 is a schematic diagram of a light source module according to an embodiment of the present invention, Fig. 4A is a normalized spectrum diagram of each point light source in Fig. 3, and Fig. 4B is a CIE1931 chromaticity diagram of light provided by each point light source in Fig. 3 Schematic diagram of the corresponding color coordinate points. Please refer to FIG. 3 and FIG. 4A first. The light source module 200 of this embodiment is suitable for a projection device to provide an illumination beam required by the projection device. In the light source module 200, the first point light source can be divided into two types (namely the first point light source R1 and R2), the second point light source can be divided into two types (ie the second point light source G1 and G2), and the third point light source The light sources can be divided into two types (namely, the third point light sources B1 and B2).

The main light emitting wavelengths of the first point light sources R1 and R2 are different, and the main light emitting wavelengths are within the wavelength range of red light. The main light emitting wavelengths of the second point light sources G1 and G2 are different, and the main light emitting wavelengths are within the wavelength range of green light. The main emission wavelengths of the third point light sources B1 and B2 are different, and the main emission wavelengths are within the wavelength range of blue light. In addition, the first point light sources R1 , R2 , the second point light sources G1 , G2 , and the third point light sources B1 , B2 are disposed on the circuit board 210 , for example.

Based on the above, the first point light sources R1 , R2 , the second point light sources G1 , G2 and the third point light sources B1 , B2 can be light emitting diodes or laser diodes. In more detail, the first point light sources R1, R2, the second point light sources G1, G2 and the third point light sources B1, B2 can all be light emitting diodes or all laser diodes, or some of them can be light emitting diodes and the rest can be lasers. diode. However, the number of each point light source in the present invention is not limited to two, and the number of each point light source can also be three or more. And the arrangement of the point light sources is not limited to that shown in FIG. 3 .

In a preferred embodiment, the main emission wavelengths of the first point light source R1 and the second point light source R2 are λ ₁₁ and λ ₁₂ respectively, and 4nm≤|λ ₁₂ -λ ₁₁ |≤40nm. In addition, the main emission wavelengths of the second point light source G1 and the second point light source G2 are λ ₂₁ and λ ₂₂ respectively, and 4nm≦|λ ₂₂ -λ ₂₁ |≦20nm. In addition, the main emission wavelengths of the third point light source B1 and the third point light source B2 are λ ₃₁ and λ ₃₂ respectively, and 4nm≦|λ ₃₂ -λ ₃₁ |≦30nm.

Take λ ₁₁ , λ ₁₂ , λ ₂₁ , λ ₂₂ , λ ₃₁ and λ ₃₂ equal to 620nm, 632nm, 527nm, 537nm, 448nm and 466nm as an example. The light provided by the first point light source R1 and R2 corresponds to the color coordinate points in the CIE1931 chromaticity diagram, for example, PR1 (0.690, 0.308) and PR2 (0.712, 0.289), and the first point light source R1 and R2 provide After the light is mixed, the corresponding color coordinate point in the CIE1931 chromaticity diagram is PR (0.701, 0.296), and the main wavelength after mixing is 628nm. In addition, the color coordinate points corresponding to the light provided by the second point light sources G1 and G2 in the CIE1931 chromaticity diagram are PG1 (0.180, 0.700) and PG2 (0.220, 0.720), respectively, and the second point light sources G1 and G2 are After the provided light is mixed, the corresponding color coordinate point in the CIE1931 chromaticity diagram is PG (0.199, 0.708), and the main wavelength after mixing is 531nm. In addition, the color coordinate points corresponding to the light rays provided by the third point light sources B1 and B2 in the CIE1931 chromaticity diagram are respectively PB1 (0.160, 0.020) and PB2 (0.139, 0.050), and the third point light sources B1 and B2 After the provided light is mixed, the corresponding color coordinate point in the CIE1931 chromaticity diagram is PB (0.151, 0.033), and the main wavelength after mixing is 458nm.

Since the light source module 200 of this embodiment mixes the light provided by the first point light sources R1 and R2 into the required red light color, and mixes the light provided by the second point light source G1 and G2 into the required green light color, and passes through the second point light source G1 and G2. The light provided by the three point light sources B1 and B2 is mixed into the desired blue light color. Therefore, the problem of discontinuity of red light, green light and blue light in the wavelength range of visible light can be improved, so the color rendering coefficient of white light mixed with red light, green light and blue light can be increased to between 60 and 85. Applying the light source module 200 to a projection device can improve the image quality of the projection device.

The main light emission wavelength of the point light source may drift with the temperature change of the point light source or the current change of the point light source. In an embodiment of the present invention, the main light emission can be improved by selecting point light sources with different characteristics. Wavelength drift leads to unstable quality of the light source provided by the light source module.

For example, the material of the first point light source R1 may include indium arsenide/aluminum gallium arsenide (InAs/AlGaAs), and its main emission wavelength will be blue-shifted due to the temperature increase of the first point light source R1. The material of the first point light source R2 may include indium gallium nitride/gallium nitride (InGaN/GaN), and its main emission wavelength will be red-shifted due to the temperature increase of the first point light source R2. In this way, when the temperature of the first point light sources R1 and R2 rises, although the main emission wavelengths of the first point light sources R1 and R2 will produce a blue shift and a red shift respectively, the red light color mixed by the light provided by the first point light sources R1 and R2 is not easy affected.

Therefore, in this embodiment, the main light emission wavelengths of some of the first point light sources (such as the first point light source R1) selected will produce a blue shift as the temperature of the first point light source increases, and the rest of the first point light sources (such as For example, the main emission wavelength of the first point light source R2) will produce a red shift as the temperature of the first point light source increases. In addition, the main emission wavelengths of some of the second point light sources (such as the second point light source G1) selected in this embodiment will produce a blue shift as the temperature of the second point light source increases, and the remaining second point light sources (such as the second point light source G1) will have a blue shift. For example, the main emission wavelength of the second point light source G2) will produce a red shift as the temperature of the second point light source increases. In addition, the main emission wavelengths of some of the third point light sources (such as the third point light source B1) selected in this embodiment will produce a blue shift as the temperature of the third point light source increases, and the rest of the third point light sources (such as For example, the main luminous wavelength of the third point light source B2) will produce a red shift as the temperature of the third point light source increases.

Similarly, in another embodiment, the main emission wavelengths of some of the first point light sources (such as the first point light source R1) will produce a blue shift as the current passing through the first point light source increases, and the remaining first point light sources (eg, the first point light source R2 ) the main luminous wavelength will be red-shifted with the increase of the current passed into the first point light source. In addition, the main luminescent wavelengths of some second point light sources (such as the second point light source G1) will produce a blue shift as the current passing through the second point light source increases, and the rest of the second point light sources (such as the second point light source G2) The main luminous wavelength of , will be red-shifted with the increase of the current passed to the second point light source. In addition, the main luminous wavelength of part of the third point light source (such as the third point light source B1) will produce a blue shift as the current passing through the third point light source increases, and the rest of the third point light source (such as the third point light source B2) The main luminescent wavelength of will be red-shifted as the current to the third point light source increases. It should be noted that the main light emission wavelengths of the part of the first point light source (second point light source/third point light source) referred to in the present invention or the embodiment of the present invention will increase with temperature or as the first point light source ( The current of the second point light source/third point light source) increases to produce a blue shift, or similar terms, the number of the so-called "part of the first point light source" is one or more.

Although the first point light source, the second point light source and the third point light source in this embodiment are divided into two types respectively, in the present invention, the first point light source, the second point light source and the third point light source can be divided into two types respectively. more than one species. An embodiment in which the first point light source, the second point light source and the third point light source are divided into three types will be described below.

5A and 5B are schematic diagrams of the normalized spectrum diagram of each point light source and the corresponding color coordinate points in the CIE1931 chromaticity diagram of the light provided by each point light source in another embodiment of the present invention. Please refer to FIG. 5A and FIG. 5B. In this embodiment, the first point light sources are divided into three types (ie, the first point light sources R1, R2 and R3), and the second point light sources are divided into three types (ie, the second point light sources G1 , G2 and G3), and the third point light source is divided into three types (ie, the third point light source B1, B2 and B3).

The main emission wavelengths of the first point light sources R1, R2 and R3 are λ ₁₁ , λ ₁₂ and λ ₁₃ respectively, and 4nm≤|λ ₁₂ -λ ₁₁ |≤40nm, 4nm≤|λ ₁₃ -λ ₁₂ |≤40nm. The main emission wavelengths of the second point light sources G1, G2 and G3 are λ ₂₁ , λ ₂₂ and λ ₂₃ respectively, and 4nm≤|λ ₂₂ -λ ₂₁ |≤20nm, 4nm≤|λ ₂₃ -λ ₂₂ |≤20nm. The main emission wavelengths of the third point light sources B1, B2 and B3 are λ ₃₁ , λ ₃₂ and λ ₃₃ respectively, and 4nm≤|λ ₃₂ -λ ₃₁ |≤30nm, 4nm≤|λ ₃₃ -λ ₃₂ |≤30nm.

Take λ ₁₁ , λ ₁₂ , λ ₁₃ , λ ₂₁ , λ ₂₂ , λ ₂₃ , λ ₃₁ , λ ₃₂ and λ ₃₃ equal to 620nm, 630nm, 648nm, 524nm, 529nm, 537nm, 448nm, 453nm and 467nm as an example. The color coordinate points corresponding to the light rays provided by the first point light sources R1, R2 and R3 in the CIE1931 chromaticity diagram are, for example, PR1 (0.691, 0.308), PR2 (0.708, 0.292) and PR3 (0.690, 0.280), respectively, and The light provided by the first point light source R1 , R2 and R3 is mixed and the corresponding color coordinate point in the CIE1931 chromaticity diagram is PR (0.701, 0.296), and the main wavelength after the mixing is 628nm. The color coordinate points corresponding to the light provided by the second point light source G1, G2 and G3 in the CIE1931 chromaticity diagram are PG1 (0.180, 0.670), PG2 (0.180, 0.730) and PG3 (0.220, 0.720), respectively, and the first After mixing the light provided by the two point light sources G1, G2 and G3, the corresponding color coordinate point in the CIE1931 chromaticity diagram is PG (0.199, 0.708), and the main wavelength after mixing is 531nm. In addition, the color coordinate points corresponding to the light rays provided by the third point light sources B1, B2 and B3 in the CIE1931 chromaticity diagram are PB1 (0.160, 0.020) and PB2 (0.171, 0.050) and PB3 (0.133, 0.050), respectively, After the light provided by the third point light source B1, B2 and B3 is mixed, the corresponding color coordinate point in the CIE1931 chromaticity diagram is PB(0.151, 0.033), and the main wavelength after mixing is 458nm.

Since the main light-emitting wavelengths of the first point light source, the second point light source and the third point light source in this embodiment can be divided into three types, the discontinuity of red light, green light and blue light in the wavelength range of visible light can be further improved. The problem is that the color rendering factor of white light mixed with red light, green light and blue light can be increased to between 70 and 95. In addition, similar to the previous embodiment, in this embodiment, point light sources with different characteristics can also be selected to improve the influence caused by the shift of the main emission wavelength of the point light source.

6A and 6B are schematic diagrams of a light source module according to another embodiment of the present invention. Please refer to FIG. 6A first. The light source module 200a of the present invention is suitable for a projection device. The light source module 200a includes a first light source group 220, a second light source group 230, a third light source group 240 and a light combination unit 250a. The first light source group 220 includes a plurality of first point light sources (not shown) of the above-mentioned embodiment of the present invention, the second light source group 230 includes a plurality of second point light sources (not shown) of the above-mentioned embodiment of the present invention, and the first The three light source group 240 includes a plurality of third point light sources (not shown) in the above-mentioned embodiments of the present invention. In addition, similar to the above-mentioned embodiments, the first point light source, the second point light source and the third point light source can be divided into two or more types according to their main light emitting wavelengths.

Based on the above, the first light source group 220 , the second light source group 230 and the third light source group 240 can provide red light 222 , green light 232 and blue light 242 respectively. The light combining unit 250a is, for example, an X-prism (X-prism), which has two dichroic surfaces 252a, 252b, wherein the dichroic surface 252b can pass the green light 232 and reflect the red light 222, while the dichroic surface The surface 252 a can pass the green light 232 and reflect the blue light 242 , so that the red light 222 , the green light 232 and the blue light 242 can be combined into an illumination beam 202 .

Referring to FIG. 6B , the difference between the light source module 200 b of this embodiment and the light source module 200 a of FIG. 6A lies in the light combining unit. Specifically, the light combining unit 250b of the light source module 200b includes a reflector 254 and two dichroic beam splitters 256a, 256b. The reflector 254 can reflect the red light 222 provided by the first light source group 230 to the dichroic beam splitter 256b. The dichroic mirror 256a can reflect the blue light 242 provided by the third light source group 240 to the dichroic mirror 256b, and pass the green light 232 provided by the second light source group 230 to the dichroic mirror 256b. The dichroic beam splitter 256 b can pass the red light 222 and reflect the green light 232 and the blue light 242 , so that the red light 222 , the green light 232 and the blue light 242 are combined into an illumination beam 202 .

Fig. 7 is a schematic diagram of a light source module according to another embodiment of the present invention. Please refer to FIG. 7 , the light source module 300 of this embodiment is suitable for a liquid crystal display device to provide a display light source required by the liquid crystal display device. The light source module 300 includes a light box 310 and a plurality of point light sources 320 , wherein the point light sources 320 are disposed on the bottom 312 of the light box 310 . The point light sources 320 include multiple first point light sources in the above-mentioned embodiments of the present invention, multiple second point light sources in the above-mentioned embodiments of the present invention, and multiple third point light sources in the above-mentioned embodiments of the present invention. In addition, similar to the above-mentioned embodiments, the first point light source, the second point light source and the third point light source can be divided into two or more types according to their main light emitting wavelengths. In addition, a diffuser plate 330 may be provided at the light exit section 314 of the light box 310 .

Fig. 8 is a schematic diagram of a light source module according to another embodiment of the present invention. Referring to FIG. 8 , the light source module 400 of this embodiment is suitable for a liquid crystal display device to provide a display light source required by the liquid crystal display device. The light source module 400 includes a light guide plate 410 and a plurality of point light sources 420, wherein the light guide plate 410 has at least one light incident surface 412, and the point light sources 420 are disposed on a circuit board 430 and located on the light incident surface of the light guide plate 410, for example. next to 412. In addition, the point light source 420 includes multiple first point light sources in the above-mentioned embodiments of the present invention, multiple second point light sources in the above-mentioned embodiments of the present invention, and multiple third point light sources in the above-mentioned embodiments of the present invention. In addition, similar to the above-mentioned embodiments, the first point light source, the second point light source and the third point light source can be divided into two or more types according to their main light emitting wavelengths.

Since the first point light source, the second point light source and the third point light source of the light source modules 300 and 400 in FIGS. The problem of discontinuity in the wavelength range of visible light. In this way, the color rendering coefficient of white light mixed with red light, green light and blue light can be improved, thereby improving the display quality of the liquid crystal display device. In addition, similar to the above-mentioned embodiments, in the light source modules 300 and 400, point light sources with different characteristics can also be selected to improve the color instability of the light sources provided by the light source modules 300 and 400 due to the shift of the main emission wavelength of the point light sources. The problem.

The light source module of the present invention is not limited to being composed of three colors of light, and can also be composed of four or more than four colors of light; in addition, the light source module of the present invention can also be used to be composed of two colors of light, or even composed of one composed of monochromatic light. For example, in a greenhouse planting environment, it is necessary to use light of a specific color (such as yellow light) to illuminate the crops so that harmful insects cannot see the crops. At this time, the light source module is a light source module composed of multiple point light sources, and the multiple point light sources The main emission wavelength of the light source is within the wavelength range of a monochromatic light (such as yellow light), and at least two point light sources have different main emission wavelengths. In addition, in other applications, such as ambient lighting that requires specific color light, a light source module composed of multiple point light sources can also be used, and the main emission wavelengths of the multiple point light sources are within the wavelength range of a monochromatic light. And at least two point light sources have different main emission wavelengths. By using this method, the color of the light source provided by the light source module can be stabilized, and the color rendering coefficient can be improved because it covers a large spectral range.

In summary, the light source module of the present invention has at least one or some or all of the following advantages:

1. In the light source module of the present invention, since the first point light source, the second point light source and the third point light source can be divided into two or more types according to their main light emitting wavelengths, the color rendering coefficient can be improved.

2. By selecting point light sources with different characteristics, the problem of unstable color of the light source provided by the light source module due to the drift of the main light emission wavelength of the point light source can be improved.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some changes and modifications without departing from the spirit and scope of the present invention. , so the protection scope of the present invention should be defined by the appended claims. In addition, any embodiment or claim of the present invention need not achieve all the objects or advantages or features disclosed in the present invention. In addition, the abstract and the title are only used to assist in the search of patent documents, and are not used to limit the scope of rights of the present invention.

Claims (23)

1. A light source module, comprising: a plurality of first point light sources, the main light emitting wavelengths of these first point light sources are within the wavelength range of the first color light, and at least two of these first point light sources have different main light emitting wavelengths, wherein when the main light emitting wavelengths of these first point light sources are When the temperature rises, the main luminous wavelengths of some of these first point light sources will produce blue shifts, and the main luminescent wavelengths of the rest of the first point light sources will produce red shifts; a plurality of second point light sources, the main emission wavelengths of these second point light sources are within the wavelength range of the second color light, and at least two of these second point light sources have different main emission wavelengths; and A plurality of third point light sources, the main emission wavelengths of these third point light sources are within the wavelength range of the third color light, and at least two of these third point light sources have different main emission wavelengths. 2. The light source module as claimed in claim 1, wherein the first color light, the second color light and the third color light are red light, green light and blue light respectively. 3. The light source module according to claim 2, wherein the first point light sources are divided into two types, the main emission wavelengths of which are λ ₁₁ and λ ₁₂ respectively, and 4nm≤|λ ₁₂ -λ ₁₁ |≤40nm. 4. The light source module according to claim 2, wherein the first point light sources are divided into three types, and their main emission wavelengths are λ ₁₁ , λ ₁₂ and λ ₁₃ respectively, and 4nm≤|λ ₁₂ -λ ₁₁ |≤40nm , 4nm≤|λ ₁₃ -λ ₁₂ |≤40nm. 5. The light source module according to claim 2, wherein the second point light sources are divided into two types, the main emission wavelengths of which are λ ₂₁ and λ ₂₂ respectively, and 4nm≤|λ ₂₂ -λ ₂₁ |≤20nm. 6. The light source module according to claim 2, wherein the second point light sources are divided into three types, the main emission wavelengths of which are λ ₂₁ , λ ₂₂ and λ ₂₃ , and 4nm≤|λ ₂₂ -λ ₂₁ |≤20nm , 4nm≤|λ ₂₃ -λ ₂₂ |≤20nm. 7. The light source module according to claim 2, wherein the third point light sources are divided into two types, the main emission wavelengths of which are λ ₃₁ and λ ₃₂ respectively, and 4nm≤|λ ₃₂ -λ ₃₁ |≤30nm. 8. The light source module according to claim 2, wherein the third point light sources are divided into three types, the main emission wavelengths of which are λ ₃₁ , λ ₃₂ and λ ₃₃ , and 4nm≤|λ ₃₂ -λ ₃₁ |≤30nm , 4nm≤|λ ₃₃ -λ ₃₂ |≤30nm. 9. The light source module according to claim 1, wherein when the temperature of the second point light sources rises, the main emission wavelengths of some of the second point light sources will have a blue shift, and the main emission wavelengths of the rest of the second point light sources will be blue-shifted. There will be a red shift. 10. The light source module according to claim 1, wherein when the temperature of the third point light sources rises, the main emission wavelengths of some of the third point light sources will have a blue shift, and the main emission wavelengths of the remaining third point light sources There will be a red shift. 11. The light source module according to claim 1, wherein when the current passing through the first point light sources increases, the main emission wavelengths of some of these first point light sources will have a blue shift, and the main emission wavelengths of the rest of the first point light sources The wavelength produces a red shift. 12. The light source module according to claim 1, wherein when the current passing through the second point light sources increases, the main emission wavelengths of some of the second point light sources will have a blue shift, and the main emission wavelengths of the rest of the second point light sources The wavelength produces a red shift. 13. The light source module as claimed in claim 1, wherein when the current passing through these third point light sources increases, the main emission wavelengths of some of these third point light sources will have a blue shift, and the main emission wavelengths of the remaining third point light sources The wavelength produces a red shift. 14. The light source module according to claim 1, wherein each of these first point light sources is a light emitting diode or a laser diode, each of these second point light sources is a light emitting diode or a laser diode, and each of these third point light sources is a light emitting diode diode or laser diode. 15. The light source module according to claim 1, further comprising a circuit board, and the first point light sources, the second point light sources and the third point light sources are configured on the circuit board. 16. The light source module according to claim 1, further comprising a light combining unit for combining the light provided by the first point light sources, the second point light sources and the third point light sources into an illumination beam. 17. The light source module according to claim 1, further comprising a light box, and the first point light sources, the second point light sources and the third point light sources are arranged at the bottom of the light box. 18. The light source module according to claim 17, further comprising a diffuser plate disposed at the light emitting section of the light box. 19. The light source module according to claim 1, further comprising a light guide plate, and the light guide plate has at least one light incident surface, and the first point light sources, the second point light sources and the third point light sources are arranged on the light guide plate next to the incident side. 20. A light source module, comprising: A plurality of first point light sources, the main light emitting wavelengths of these first point light sources are within the wavelength range of red light, and at least two of these first point light sources have different main light emitting wavelengths, wherein when the temperature of these first point light sources rises When high, the main luminous wavelengths of some of these first point light sources will produce blue shifts, and the main luminescent wavelengths of the rest of the first point light sources will produce red shifts; a plurality of second point light sources, the dominant emission wavelengths of these second point light sources are in the wavelength range of green light, and at least two of these second point light sources have different dominant emission wavelengths; and a plurality of third point light sources, the main emission wavelengths of these third point light sources are in the wavelength range of blue light, and at least two of these third point light sources have different main emission wavelengths, Wherein the main emission wavelengths of the two first point light sources are λ ₁₁ and λ ₁₂ respectively, and 4nm≤|λ ₁₂ -λ ₁₁ |≤40nm, the main emission wavelengths of the two second point light sources are λ ₂₁ and λ ₂₂ respectively , and 4nm≤|λ ₂₂ -λ ₂₁ |≤20nm, the main emission wavelengths of the two third point light sources are λ ₃₁ and λ ₃₂ , and 4nm≤|λ ₃₂ -λ ₃₁ |≤30nm. 21. A light source module, comprising at least a first group of multiple point light sources, the main light emission wavelength of each point light source in the first group is within the wavelength range of the first monochromatic light, and the first group of point light sources has at least two The main luminous wavelengths of each point light source are different, and when the temperature of these first point light sources rises, the main luminous wavelengths of some of these first point light sources will produce blue shifts, and the main luminous wavelengths of the remaining first point light sources will produce red displacement. 22. The light source module as claimed in claim 21, wherein the monochromatic light is red light, orange light, yellow light, green light, blue light, indigo light, or purple light. 23. The light source module as claimed in claim 21, further comprising a second group of multiple point light sources, the main emission wavelength of each point light source in the second group is within the wavelength range of the second monochromatic light, and the second group At least two of the point light sources have different main emission wavelengths, and the first monochromatic light is different from the second monochromatic light.

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