Light source device and optical imaging system

Abstract

The utility model discloses a light source device and an optical imaging system. The light source device comprises a first LED light source, a second LED light source and a light combining part. The first LED light source can comprise a first substrate, a first chip, a second chip and a fluorescent assembly. The first chip generates first exciting light, and the second chip generates second exciting light; the fluorescent component is arranged on a light path where the first exciting light and the second exciting light are located, so that the fluorescent component generates red fluorescence under the excitation of the first exciting light and generates green fluorescence under the excitation of the second exciting light. The second LED light source generates specified blue light. The light combining part is arranged on a light path where the red fluorescent light, the green fluorescent light and the specified blue light are located so as to form specified combined light. The first LED light source can generate red fluorescence and green fluorescence, and the emitting directions of the two paths of fluorescence are the same, so that light combination loss caused by overlapping of spectra of red and green light can be avoided during light combination of the red fluorescence and the green fluorescence, and the energy utilization efficiency of light is ensured.

Description

Technical Field

[0001] The present application relates to the field of optical imaging technology, and more specifically, to a light source device and an optical imaging system. Background Art

[0002] For projection equipment, the performance of its internal optical engine is an important factor affecting the quality of projection imaging. Among them, the most important factors affecting projection quality, including brightness and color, depend on the light source used by the optical engine.

[0003] At present, the main light sources used in projection equipment are three-color laser light sources, three-color LED light sources, or laser and LED hybrid light sources. Among them, the three-color LED light source has gradually become the research and development focus of scientific researchers due to its advantages such as low hardware cost and no speckle.

[0004] However, in traditional three-color LED light sources, three different color LEDs are usually used to combine wavelengths. For example, red light and green light are combined first, and then combined with blue light. However, due to the overlap of the red and green light spectra, red and green light will suffer from wavelength combination loss during the wavelength combination process, reducing the energy utilization efficiency of the projection equipment. Utility Model Content

[0005] Embodiments of the present application provide a light source device and an optical imaging system.

[0006] According to the first aspect of the present application, an embodiment of the present application provides a light source device, which includes a first LED light source, a second LED light source and a light combining component. Among them, the first LED light source may include a first substrate, a first chip, a second chip and a fluorescent component. The first chip and the second chip are arranged on the first substrate, the first chip is used to generate a first excitation light, and the second chip is used to generate a second excitation light; the fluorescent component is arranged on the optical path where the first excitation light and the second excitation light are located, so that the fluorescent component generates red fluorescence under the excitation of the first excitation light, and the fluorescent component generates green fluorescence under the excitation of the second excitation light. The second LED light source is used to generate a specified blue light. The light combining component is arranged on the optical path where the red fluorescence, green fluorescence and the specified blue light are located, and is used to guide the red fluorescence, green fluorescence and the specified blue light to be emitted in the same direction to form a specified combined light.

[0007] In some possible embodiments, the first chip and the second chip are arranged at an interval, and the emission direction of the first excitation light is the same as the emission direction of the second excitation light. The first LED light source also includes an insulating member, which is arranged between the first chip and the second chip.

[0008] In some possible embodiments, the fluorescent component includes a red fluorescent component and a green fluorescent component, the red fluorescent component is arranged on the optical path of the first excitation light, so that the red fluorescent component generates red fluorescence under the excitation of the first excitation light, and the green fluorescent component is arranged on the optical path of the second excitation light, so that the green fluorescent component generates green fluorescence under the excitation of the second excitation light.

[0009] Among them, in some possible embodiments, the fluorescent component includes a yellow fluorescent component, a first filter component and a second filter component. The yellow fluorescent component is arranged on the optical path where the first excitation light and the second excitation light are located, so that the yellow fluorescent component generates a first yellow fluorescence under the excitation of the first excitation light, and generates a second yellow fluorescence under the excitation of the second excitation light; the first filter component is arranged on the optical path where the first yellow fluorescence is located, and is used to transmit the red light component in the first yellow fluorescence to generate red fluorescence. The second filter component is arranged on the optical path where the second yellow fluorescence is located, and is used to transmit the green light component in the second yellow fluorescence to generate green fluorescence.

[0010] Among them, in some possible embodiments, the light combining component is used to transmit red fluorescence and green fluorescence and reflect specified blue light to form specified combined light; the light source device also includes a third LED light source, and the third LED light source is used to generate supplementary light, and the wavelength bands of the supplementary light, the specified blue light, the first excitation light and the second excitation light all belong to the wavelength band where the blue light is located; the light combining component is also arranged on the optical path where the supplementary light is located, and is used to reflect the supplementary light to the first chip and the second chip.

[0011] Among them, in some possible embodiments, the third LED light source includes a second substrate, a third chip and a fourth chip; the third chip and the fourth chip are arranged on the second substrate, the third chip is used to generate a first sub-supplementary light, and the fourth chip is used to generate a second sub-supplementary light; the light combining component is arranged on the optical path where the first sub-supplementary light and the second sub-supplementary light are located, and is used to reflect the first sub-supplementary light to the first chip, and reflect the second sub-supplementary light to the second chip.

[0012] Among them, in some possible embodiments, the first chip and the second chip are spaced apart in a specified direction, and the distance between the first chip and the second chip is a first distance; the third chip and the fourth chip are spaced apart in a specified direction, and the distance between the third chip and the fourth chip is a second distance; the absolute value of the distance difference between the second distance and the first distance is less than or equal to the specified distance.

[0013] Among them, in some possible embodiments, the first chip is provided with a first light-emitting surface, the third chip is provided with a third light-emitting surface, and the ratio of the area of ​​the third light-emitting surface to the area of ​​the first light-emitting surface is greater than or equal to 0.75 and less than or equal to 0.98; or / and the second chip is provided with a second light-emitting surface, the fourth chip is provided with a fourth light-emitting surface, and the ratio of the area of ​​the fourth light-emitting surface to the area of ​​the second light-emitting surface is greater than or equal to 0.75 and less than or equal to 0.98.

[0014] Among them, in some possible embodiments, the light source device also includes a laser light source and a reflector; the laser light source is used to generate a specified laser; the reflector is arranged on the optical path where the specified laser and the specified combined light are located, and is used to reflect the specified laser so that the propagation directions of the reflected specified laser and the specified combined light are the same.

[0015] According to the second aspect of the present application, an embodiment of the present application further provides an optical imaging system, which includes the above-mentioned light source device and a light modulator. The light source device is used to generate a specified combined light. The light modulator is arranged on the optical path where the specified combined light is located.

[0016] The embodiment of the present application provides a light source device and an optical imaging system, wherein the light source device includes a first LED light source, a second LED light source, and a light combining component. The first LED light source may include a first substrate, a first chip, a second chip, and a fluorescent component. The first chip and the second chip are arranged on the first substrate, the first chip is used to generate a first excitation light, and the second chip is used to generate a second excitation light; the fluorescent component is arranged on the optical path where the first excitation light and the second excitation light are located, so that the fluorescent component generates red fluorescence under the excitation of the first excitation light, and the fluorescent component generates green fluorescence under the excitation of the second excitation light.

[0017] The second LED light source is used to generate a designated blue light. The light combining element is arranged on the light path where the red fluorescence, green fluorescence and designated blue light are located, and is used to guide the red fluorescence, green fluorescence and designated blue light to be emitted in the same direction to form a designated combined light. Therefore, the light source device in the present application can realize a red, green and blue three-color light source.

[0018] Since the first LED light source in the present application can generate red fluorescence and green fluorescence, and the emission directions of the two fluorescences are the same, it is possible to combine the two light paths without setting a dichroic filter in the light path of the red fluorescence and the green fluorescence. On the one hand, one less dichroic filter can be set in the light source device, making the overall light path structure more compact. On the other hand, the red fluorescence and the green fluorescence are combined in time, which can avoid the loss of combined light caused by the overlap of the red and green light spectra, and ensure the energy utilization efficiency of the light by the projection device equipped with the light source device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1It is a schematic diagram of the structure of the light source device provided in an embodiment of the present application.

[0021] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of a first LED light source in the light source device shown.

[0022] Figure 3 yes Figure 2 A schematic diagram of the positions of the first chip and the second chip in the first LED light source is shown.

[0023] Figure 4 yes Figure 1 Another schematic cross-sectional structure diagram of the first LED light source in the light source device is shown.

[0024] Figure 5 This is another structural schematic diagram of the light source device provided in an embodiment of the present application.

[0025] Figure 6 yes Figure 5 A schematic diagram of the positions of the third chip and the fourth chip in the third LED light source is shown.

[0026] Figure 7 yes Figure 5 A schematic cross-sectional structure diagram of a third LED light source in the light source device shown.

[0027] Figure 8 This is another structural schematic diagram of the light source device provided in an embodiment of the present application.

[0028] Fig. 9 It is a schematic diagram of the structure of the optical imaging system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0030] The embodiment of the present application provides a light source device 10, which is an LED light source. The light source device 10 has the advantages of low hardware cost and no speckle, and can be widely used in projection equipment (for example, micro projectors, short-focus projectors, etc.). The light source device 10 can also be widely used in laser equipment (for example, laser TVs, engineering projectors, laser mosaic walls, etc.), and as a supplementary light source in the above laser equipment.

[0031] See also Figure 1 and Figure 2 , the light source device 10 may include a first LED light source 110, a second LED light source 120 and a light combining member 130. Among them, the first LED light source 110 may include a first substrate 1100, a first chip 1110, a second chip 1120 and a fluorescent component 1130. The first chip 1110 and the second chip 1120 are arranged on the first substrate 1100, the first chip 1110 is used to generate a first excitation light (not shown in the figure), and the second chip 1120 is used to generate a second excitation light (not shown in the figure). The fluorescent component 1130 is arranged on the optical path where the first excitation light and the second excitation light are located, so that the fluorescent component 1130 generates red fluorescence FR under the excitation of the first excitation light, and the fluorescent component 1130 generates green fluorescence FG under the excitation of the second excitation light.

[0032] The second LED light source 120 is used to generate the designated blue light LB. The light combining member 130 is arranged on the optical path where the red fluorescent light FR, the green fluorescent light FG and the designated blue light LB are located, and is used to guide the red fluorescent light FR, the green fluorescent light FG and the designated blue light LB to be emitted in the same direction to form the designated combined light O. Therefore, the light source device 10 in the present application can realize a red, green and blue three-color light source.

[0033] Since the first LED light source 110 in the present application can generate red fluorescence FR and green fluorescence FG, and the emission directions of the two fluorescences are the same, it is possible to combine the two light paths without setting a dichroic filter on the light path of the red fluorescence FR and the green fluorescence FG. On the one hand, one less dichroic filter can be set in the light source device 10, making the overall light path structure more compact. On the other hand, the red fluorescence FR and the green fluorescence FG are combined in time, which can avoid the loss of combined light caused by the overlap of the red and green light spectra, and ensure the energy utilization efficiency of the light by the projection device equipped with the light source device 10.

[0034] The specific structure of the light source device 10 is introduced below.

[0035] In this embodiment, the first LED light source 110 is used to generate red fluorescence FR and green fluorescence FG. Figures 2 to 4, the first LED light source 110 may include a first substrate 1100, a first chip 1110, a second chip 1120 and a fluorescent component 1130. The first substrate 1100 is used to fix and support the first chip 1110, the second chip 1120 and the fluorescent component 1130. For example, the first substrate 1100 may be a copper-clad laminate, and the peripheral circuits (for example, a driving circuit, a power supply circuit, etc.) corresponding to the first chip 1110 and the second chip 1120 may be integrated on the first substrate 1100. The first chip 1110 and the second chip 1120 are spaced apart from each other on the first substrate 1100 in a specified direction D. For example, the first chip 1110 and the second chip 1120 may be embedded in the first substrate 1100, or may be fixed on the first substrate 1100 by a welding process (for example, soldering) or a flip-flop process.

[0036] In the present embodiment, the first chip 1110 is used to generate the first excitation light. The first chip 1110 is provided with a first light emitting surface 1111, and the first excitation light is emitted through the first light emitting surface 1111. Specifically, the first chip 1110 may include a plurality of first LED lamp beads (not shown in the figure), and the plurality of first LED lamp beads may be arranged in a square array of M*N to form the first light emitting surface 1111, so that the shape of the first light emitting surface 1111 is roughly rectangular. The plurality of first LED lamp beads may also be arranged in a ring-shaped nested manner to form the first light emitting surface 1111, so that the shape of the first light emitting surface 1111 is roughly circular. Specifically, the first LED lamp beads are dark blue LED lamp beads, that is, the first excitation light is dark blue light.

[0037] In the present embodiment, the second chip 1120 is used to generate a second excitation light. The second chip 1120 is provided with a second light emitting surface 1121, through which the second excitation light is emitted. Specifically, the second chip 1120 may include a plurality of second LED lamp beads (not shown in the figure), and the plurality of second LED lamp beads may be arranged in a square array of M*N to form the second light emitting surface 1121, so that the shape of the second light emitting surface 1121 is roughly rectangular. The plurality of second LED lamp beads may also be arranged in a ring-shaped nested manner to form the second light emitting surface 1121, so that the shape of the second light emitting surface 1121 is roughly circular. Specifically, the second LED lamp beads are dark blue LED lamp beads, that is, the second excitation light is dark blue light.

[0038] In this embodiment, the first light emitting surface 1111 of the first chip 1110 and the second light emitting surface 1121 of the second chip 1120 are located on the same side of the first substrate 1100 so that the emission direction of the first excitation light and the emission direction of the second excitation light are the same.

[0039] In some possible embodiments, the first chip 1110 and the second chip 1120 may be two dark blue LED chips of the same model to reduce the hardware cost of the first LED light source 110. In other possible embodiments, the first chip 1110 and the second chip 1120 may be two different dark blue LED chips, and the R&D personnel may adjust the number of LED lamp beads inside the chip and the specific arrangement of the LED lamp beads according to actual needs, which is not specifically limited in this embodiment.

[0040] In some possible embodiments, the first LED light source 110 may further include an insulating member 1140, and the insulating member 1140 is disposed between the first chip 1110 and the second chip 1120. Figure 3 In the illustrated embodiment, the first chip 1110, the insulating member 1140, and the second chip 1120 are sequentially arranged in a specified direction D. In this embodiment, by arranging the insulating member 1140 between the first chip 1110 and the second chip 1120, the anti-electromagnetic interference capability of the two chips can be improved, and the current generated by one chip during operation can be prevented from affecting the other chip, thereby ensuring that the first chip 1110 and the second chip 1120 can operate normally. Specifically, the insulating member 1140 can be an insulating tape or an insulating strip.

[0041] In this embodiment, the fluorescent component 1130 is arranged on the optical path where the first excitation light and the second excitation light are located, so that the fluorescent component 1130 generates red fluorescence FR under the excitation of the first excitation light, and generates green fluorescence FG under the excitation of the second excitation light. It is not difficult to understand here that, since the emission direction of the first excitation light and the emission direction of the second excitation light are the same, the emission direction of the red fluorescence FR generated by the fluorescent component 1130 under the excitation of the first excitation light and the emission direction of the green fluorescence FG generated by the fluorescent component 1130 under the excitation of the second excitation light are also the same.

[0042] In some possible embodiments, Figure 2As shown, the fluorescent component 1130 may include a red fluorescent component 1131 and a green fluorescent component 1132. The red fluorescent component 1131 is arranged on the optical path where the first excitation light is located, so that the red fluorescent component 1131 generates red fluorescence FR under the excitation of the first excitation light. Among them, the red fluorescent component 1131 can be arranged on the first light-emitting surface 1111 of the first chip 1110. Specifically, the red fluorescent component 1131 can be a red fluorescent ceramic sheet, in which a large number of red fluorescent particles are doped, and the red fluorescent ceramic sheet can be attached to the first light-emitting surface 1111 of the first chip 1110, and the size of the red fluorescent ceramic sheet can be slightly larger than or equal to the size of the first light-emitting surface 1111, so that the red fluorescent ceramic sheet fully covers the first light-emitting surface 1111. The red fluorescent component 1131 can also be a red fluorescent glue layer, which can be made by doping a large number of red fluorescent particles in a viscous colloid, and the red fluorescent glue layer can be coated on the first light-emitting surface 1111 of the first chip 1110, so that the overall structure of the first LED light source 110 is more solid and reliable.

[0043] The green fluorescent component 1132 is arranged on the optical path where the second excitation light is located, so that the green fluorescent component 1132 generates green fluorescence FG under the excitation of the second excitation light. The green fluorescent component 1132 can be arranged on the second light-emitting surface 1121 of the second chip 1120. Specifically, the green fluorescent component 1132 can be a green fluorescent ceramic sheet, in which a large number of green fluorescent particles are doped, and the green fluorescent ceramic sheet can be attached to the second light-emitting surface 1121 of the second chip 1120, and the size of the green fluorescent ceramic sheet can be slightly larger than or equal to the size of the second light-emitting surface 1121, so that the green fluorescent ceramic sheet fully covers the second light-emitting surface 1121. The green fluorescent component 1132 can also be a green fluorescent glue layer, which can be made by doping a large number of green fluorescent particles in a viscous colloid, and the green fluorescent glue layer can be coated on the second light-emitting surface 1121 of the second chip 1120, so that the overall structure of the first LED light source 110 is more solid and reliable.

[0044] In some other possible embodiments, Figure 4As shown, the fluorescent component 1130 may include a yellow fluorescent element 1133, a first filter 1134 and a second filter 1135. The yellow fluorescent element 1133 is arranged on the optical path where the first excitation light and the second excitation light are located, so that the yellow fluorescent element 1133 generates a first yellow fluorescence (not shown in the figure) under the excitation of the first excitation light, and the yellow fluorescent element 1133 generates a second yellow fluorescence (not shown in the figure) under the excitation of the second excitation light. The yellow fluorescent element 1133 can be arranged on the first light emitting surface 1111 of the first chip 1110 and the second light emitting surface 1121 of the second chip 1120. The number of the yellow fluorescent elements 1133 can also be two, and the two yellow fluorescent elements 1133 are arranged on the first light emitting surface 1111 of the first chip 1110 and the second light emitting surface 1121 of the second chip 1120 in a one-to-one correspondence. Specifically, the yellow fluorescent component 1133 can be a yellow fluorescent ceramic sheet, in which a large number of yellow fluorescent particles are doped, and the yellow fluorescent ceramic sheet can be attached to the first light emitting surface 1111 of the first chip 1110 and the second light emitting surface 1121 of the second chip 1120. The yellow fluorescent component 1133 can also be a yellow fluorescent adhesive layer, which can be made by doping a large number of yellow fluorescent particles in a viscous colloid, and the yellow fluorescent adhesive layer can be applied to the first light emitting surface 1111 of the first chip 1110 and the second light emitting surface 1121 of the second chip 1120, so as to make the overall structure of the first LED light source 110 more solid and reliable. Since only one color of fluorescent components need to be provided in this embodiment, the hardware cost of the first LED light source 110 can be reduced.

[0045] In this embodiment, the first filter 1134 is arranged on the optical path where the first yellow fluorescence is located, and is used to transmit the red light component in the first yellow fluorescence to generate the red fluorescence FR. Specifically, the first filter 1134 can be a filter that transmits red light. It is not difficult to understand here that the spectrum of the first yellow fluorescence in this embodiment is relatively wide, and can be regarded as a mixed light of the red fluorescence component and the green fluorescence component. In the process of the first yellow fluorescence passing through the first filter 1134, the red fluorescence component in the first yellow fluorescence can be transmitted through the first filter 1134, while the green fluorescence component in the first yellow fluorescence cannot be transmitted through the first filter 1134, so that the first yellow fluorescence can be converted into the red fluorescence FR after passing through the first filter 1134.

[0046] The first filter 1134 may be disposed on a side of the yellow fluorescent component 1133 away from the first chip 1110, and may be disposed opposite to the first chip 1110. In some possible embodiments, the yellow fluorescent component 1133 is a yellow fluorescent ceramic sheet, the first filter 1134 may be attached to a side of the yellow fluorescent ceramic sheet away from the first chip 1110, and the projection of the first filter 1134 in the direction of the optical path where the first excitation light is located may cover the first light emitting surface 1111 of the first chip 1110, so that the first yellow fluorescence emitted through the yellow fluorescent ceramic sheet can be fully converted into red fluorescence FR by the first filter 1134. In other possible embodiments, the yellow fluorescent component 1133 is a yellow fluorescent adhesive layer, and the first filter 1134 may be attached to the first light emitting surface 1111 of the first chip 1110 through the yellow fluorescent adhesive layer, so that the overall structure of the first LED light source 110 is more solid and reliable.

[0047] In this embodiment, the second filter 1135 is arranged on the optical path where the second yellow fluorescence is located, and is used to transmit the green light component in the second yellow fluorescence to generate the green fluorescence FG. Specifically, the second filter 1135 can be a filter that transmits green light. It is not difficult to understand here that the spectrum of the second yellow fluorescence in this embodiment is relatively wide, and can be regarded as a mixed light of the red fluorescence component and the green fluorescence component. In the process of the second yellow fluorescence passing through the second filter 1135, the green fluorescence component in the second yellow fluorescence can be transmitted through the second filter 1135, while the red fluorescence component in the second yellow fluorescence cannot be transmitted through the second filter 1135, so that the second yellow fluorescence can be converted into the green fluorescence FG after passing through the second filter 1135.

[0048] The second filter 1135 may be disposed on the side of the yellow fluorescent component 1133 away from the second chip 1120, and may be disposed opposite to the second chip 1120. In some possible embodiments, the yellow fluorescent component 1133 is a yellow fluorescent ceramic sheet, the second filter 1135 may be attached to the side of the yellow fluorescent ceramic sheet away from the second chip 1120, and the projection of the second filter 1135 in the direction of the optical path where the second excitation light is located may cover the second light emitting surface 1121 of the second chip 1120, so that the second yellow fluorescence emitted through the yellow fluorescent ceramic sheet can be fully converted into green fluorescence FG by the second filter 1135. In other possible embodiments, the yellow fluorescent component 1133 is a yellow fluorescent adhesive layer, and the second filter 1135 may be attached to the second light emitting surface 1121 of the second chip 1120 through the yellow fluorescent adhesive layer, so that the overall structure of the first LED light source 110 is more solid and reliable.

[0049] In some possible embodiments, the light source device 10 may further include a first collecting component 140, which is disposed between the first LED light source 110 and the light combining element 130 and is located on the optical path of the red fluorescence FR and the green fluorescence FG generated by the first LED light source 110, and is used to collect the red fluorescence FR and the green fluorescence FG to improve the energy utilization efficiency of the red fluorescence FR and the green fluorescence FG.

[0050] Specifically, the first collecting component 140 may include one or more collecting lenses, and the one or more collecting lenses are arranged on the optical path where the red fluorescent light FR and the green fluorescent light FG are located. Figure 1 In the embodiment shown, there are two collecting lenses, which are respectively a first collecting lens 1410 and a second collecting lens 1430. The first collecting lens 1410 and the second collecting lens 1430 are sequentially arranged at intervals along the optical path where the red fluorescent light FR and the green fluorescent light FG are located, so as to improve the energy utilization efficiency of the red fluorescent light FR and the green fluorescent light FG. As an implementation method, the first collecting lens 1410 and the second collecting lens 1430 can be positive lenses respectively.

[0051] In this embodiment, the second LED light source 120 is used to generate the specified blue light LB. The second LED light source 120 may be a blue LED chip, which may include a plurality of blue LED lamp beads (not shown in the figure), and the plurality of blue LED lamp beads are used to jointly generate the specified blue light LB. Specifically, the plurality of blue LED lamp beads may be arranged in a square matrix of M*N, or may be arranged in a ring-shaped nested arrangement, which is not specifically limited in this embodiment.

[0052] In some possible embodiments, the light source device 10 may further include a second collecting component 150, which is disposed between the second LED light source 120 and the light combining element 130 and is located on the optical path of the designated blue light LB generated by the second LED light source 120, and is used to collect the designated blue light LB to improve the energy utilization efficiency of the designated blue light LB.

[0053] Specifically, the second collecting component 150 may include one or more collecting lenses, and the one or more collecting lenses are arranged on the optical path where the designated blue light LB is located. Figure 1 In the illustrated embodiment, there are two collecting lenses, which are a third collecting lens 1510 and a fourth collecting lens 1530. The third collecting lens 1510 and the fourth collecting lens 1530 are sequentially arranged at intervals along the optical path of the designated blue light LB to improve the energy utilization efficiency of the designated blue light LB. As an implementation method, the third collecting lens 1510 and the fourth collecting lens 1530 can be positive lenses respectively.

[0054] In this embodiment, the light combining element 130 is disposed on the optical path of the red fluorescence FR, the green fluorescence FG and the designated blue light LB, and is used to guide the red fluorescence FR, the green fluorescence FG and the designated blue light LB to emit in the same direction to form the designated combined light O.

[0055] As an implementation method, Figure 1 As shown, the light combiner 130 can be used to transmit red fluorescent light FR and green fluorescent light FG and reflect designated blue light LB to form designated combined light O. Specifically, the light combiner 130 can be a dichroic plate, which can be coated with a film layer that reflects blue light and transmits yellow light, or coated with a film layer that reflects blue light and transmits red and green light.

[0056] As another embodiment, the light combining element 130 can be used to reflect the red fluorescent light FR and the green fluorescent light FG and transmit the specified blue light LB to form the specified combined light O. Specifically, the light combining element 130 can be a dichroic plate, which can be coated with a film layer that transmits blue light and reflects yellow light, or coated with a film layer that transmits blue light and reflects red and green light.

[0057] In some possible embodiments, the light combining element 130 is used to transmit the red fluorescent light FR and the green fluorescent light FG and reflect the designated blue light LB. Figure 5 , the light source device 10 may further include a third LED light source 160, which is used to generate supplementary light S, wherein the wavelength bands of the supplementary light S, the designated blue light LB, the first excitation light, and the second excitation light all belong to the wavelength band where the blue light is located. That is to say, the main wavelengths of the supplementary light S, the designated blue light LB, the first excitation light, and the second excitation light are between 400nm and 480nm. Specifically, the supplementary light S, the first excitation light, and the second excitation light may be deep blue light, and the designated blue light LB may be blue light. For example, the main wavelengths of the supplementary light S, the first excitation light, and the second excitation light may be between 400nm and 420nm, and the main wavelength of the designated blue light LB may be between 430nm and 450nm.

[0058] exist Figure 5 In the illustrated embodiment, the light combining member 130 is further arranged on the optical path where the supplementary light S is located, and is used to reflect the supplementary light S to the first chip 1110 and the second chip 1120. In this embodiment, the supplementary light S can be used as a supplementary light source for the first LED light source 110 to achieve double-sided excitation of the red fluorescent light FR and the green fluorescent light FG, thereby increasing the light intensity of the red fluorescent light FR and the green fluorescent light FG and improving the light efficiency of the light source device 10.

[0059] See also Figure 6 and Figure 7, the third LED light source 160 may include a second substrate 1600, a third chip 1610 and a fourth chip 1620. The second substrate 1600 is used to play a role in fixing and carrying the third chip 1610 and the fourth chip 1620. For example, the second substrate 1600 may be a copper-clad laminate, and the peripheral circuits (for example, a driving circuit, a power supply circuit, etc.) corresponding to the third chip 1610 and the fourth chip 1620 may be integrated on the second substrate 1600. The third chip 1610 and the fourth chip 1620 are spaced apart on the second substrate 1600 in a specified direction D. For example, the third chip 1610 and the fourth chip 1620 may be embedded in the second substrate 1600, or may be fixed on the second substrate 1600 by a welding process (for example, soldering) or a flip-down process.

[0060] In the present embodiment, the third chip 1610 is used to generate the first sub-supplementary light S1. The third chip 1610 is provided with a third light emitting surface 1611, and the first sub-supplementary light S1 is emitted through the third light emitting surface 1611. Specifically, the third chip 1610 may include a plurality of third LED lamp beads (not shown in the figure), and the plurality of third LED lamp beads may be arranged in a square array of M*N to form the third light emitting surface 1611, so that the shape of the third light emitting surface 1611 is roughly rectangular. The plurality of third LED lamp beads may also be arranged in a ring-shaped nested manner to form the third light emitting surface 1611, so that the shape of the third light emitting surface 1611 is roughly circular. Specifically, the third LED lamp beads are dark blue LED lamp beads, that is, the first sub-supplementary light S1 is dark blue light.

[0061] In the present embodiment, the fourth chip 1620 is used to generate the second sub-supplementary light S2. The fourth chip 1620 is provided with a fourth light emitting surface 1621, and the second sub-supplementary light S2 is emitted through the fourth light emitting surface 1621. Specifically, the fourth chip 1620 may include a plurality of fourth LED lamp beads (not shown in the figure), and the plurality of fourth LED lamp beads may be arranged in a square array of M*N to form the fourth light emitting surface 1621, so that the shape of the fourth light emitting surface 1621 is roughly rectangular. The plurality of fourth LED lamp beads may also be arranged in a ring-shaped nested manner to form the fourth light emitting surface 1621, so that the shape of the fourth light emitting surface 1621 is roughly circular. Specifically, the fourth LED lamp beads are dark blue LED lamp beads, that is, the second sub-supplementary light S2 is dark blue light. Therefore, the above-mentioned supplementary light S can be regarded as a mixed light of the first sub-supplementary light S1 and the second sub-supplementary light S2.

[0062] In this embodiment, the third light emitting surface 1611 of the third chip 1610 and the fourth light emitting surface 1621 of the fourth chip 1620 are located on the same side of the second substrate 1600 so that the emitting direction of the first supplementary sub-light S1 is the same as the emitting direction of the second supplementary sub-light S2.

[0063] In some possible embodiments, the third chip 1610 and the fourth chip 1620 may be two dark blue LED chips of the same model to reduce the hardware cost of the third LED light source 160. In other possible embodiments, the third chip 1610 and the fourth chip 1620 may be two different dark blue LED chips, and the R&D personnel may adjust the number of LED lamp beads inside the chip and the specific arrangement of the LED lamp beads according to actual needs, which is not specifically limited in this embodiment.

[0064] In some possible embodiments, an insulating member may be provided between the third chip 1610 and the fourth chip 1620. The insulating member may improve the anti-electromagnetic interference capability of the two chips, and may also prevent the current generated by one chip during operation from affecting the other chip, thereby ensuring that the third chip 1610 and the fourth chip 1620 can operate normally. Specifically, the insulating member may be an insulating tape or an insulating strip.

[0065] exist Figure 5 In the illustrated embodiment, the light combining element 130 is disposed on the optical path where the first sub-supplementary light S1 and the second sub-supplementary light S2 are located, and is used to reflect the first sub-supplementary light S1 to the first chip 1110, and reflect the second sub-supplementary light S2 to the second chip 1120. Therefore, in this embodiment, the two paths of sub-supplementary light generated by the third LED light source 160 correspond one to one to the two chips on the first LED light source 110. Among them, the first sub-supplementary light S1 can be used as a supplementary light source for the first chip 1110 to achieve double-sided excitation of the red fluorescent light FR. The second sub-supplementary light S2 can be used as a supplementary light source for the second chip 1120 to achieve double-sided excitation of the green fluorescent light FG.

[0066] Specifically, when the first supplementary light S1 is incident on the first chip 1110, it passes through the fluorescent component 1130 (for example, Figure 2 The red fluorescent component 1131 in the second chip 1120 is used to generate red fluorescent light FR under the stimulation of the first sub-supplementary light S1, thereby improving the overall brightness of the red fluorescent light FR. When the second sub-supplementary light S2 is incident on the second chip 1120, it passes through the fluorescent component 1130 (for example, Figure 2 The green fluorescent component 1132 in the fluorescent component 1130 generates green fluorescent light FG under the excitation of the second sub-supplementary light S2, thereby improving the overall brightness of the green fluorescent light FG.

[0067] It should be noted that the fluorescent component 1130 adopts Figure 4 In the case of the structure shown, the first filter 1134 and the second filter 1135 are also used to transmit blue light respectively, so that the first supplementary sub-light S1 and the second supplementary sub-light S2 are smoothly incident on the yellow fluorescent element 1133 .

[0068] In some possible embodiments, please refer to Figure 3 and Figure 6 , the distance between the first chip 1110 and the second chip 1120 is the first distance D1, and the distance between the third chip 1610 and the fourth chip 1620 is the second distance D2. The absolute value of the distance difference between the second distance D2 and the first distance D1 is less than or equal to the specified distance. The specified distance may be greater than or equal to 0 cm and less than or equal to 1 cm. For example, the specified distance may be 0 cm, 0.2 cm, 0.4 cm, 0.6 cm, 0.8 cm, and so on. Ideally, the specified distance is 0 cm, and at this time, the first distance D1 is equal to the second distance D2. Since the spacing distance between the two chips in the third LED light source 160 is substantially equal to the spacing distance between the two chips in the first LED light source 110, when the first sub-supplementary light S1 generated by the third chip 1610 can be incident on the position where the first chip 1110 is located, the second sub-supplementary light S2 generated by the fourth chip 1620 can be incident on the position where the second chip 1120 is located, thereby ensuring the energy utilization efficiency of the first sub-supplementary light S1 and the second sub-supplementary light S2.

[0069] In some possible embodiments, the third light emitting surface 1611 and the first light emitting surface 1111 have the same shape. For example, the third light emitting surface 1611 and the first light emitting surface 1111 are both rectangular, or both are circular. Specifically, the ratio of the area of ​​the third light emitting surface 1611 to the area of ​​the first light emitting surface 1111 is greater than or equal to 0.75 and less than or equal to 0.98. For example, the ratio of the areas of the two can be 0.75, 0.81, 0.85, 0.9, 0.98, etc.

[0070] Since the optical path of the first supplementary sub-light S1 is relatively long, the light of the first supplementary sub-light S1 is continuously diverged during the process of propagating to the first chip 1110, causing the light spot corresponding to the first supplementary sub-light S1 to continuously increase. Therefore, the area of ​​the third light emitting surface 1611 in this embodiment is slightly smaller than the area of ​​the first light emitting surface 1111, so that the light spot of the first supplementary sub-light S1 emitted from the third light emitting surface 1611 can roughly overlap with the first light emitting surface 1111 when propagating to the first light emitting surface 1111, so as to ensure the energy utilization efficiency of the first supplementary sub-light S1.

[0071] In some possible embodiments, the fourth light emitting surface 1621 and the second light emitting surface 1121 have the same shape. For example, the fourth light emitting surface 1621 and the second light emitting surface 1121 are both rectangular, or both are circular. Specifically, the ratio of the area of ​​the fourth light emitting surface 1621 to the area of ​​the second light emitting surface 1121 is greater than or equal to 0.75 and less than or equal to 0.98. For example, the ratio of the two areas can be 0.75, 0.81, 0.85, 0.9, 0.98, etc.

[0072] Since the optical path of the second supplementary sub-light S2 is relatively long, the light of the second supplementary sub-light S2 is continuously diverged during the process of propagating to the second chip 1120, causing the light spot corresponding to the second supplementary sub-light S2 to continuously increase. Therefore, the area of ​​the fourth light emitting surface 1621 in this embodiment is slightly smaller than the area of ​​the second light emitting surface 1121, so that the light spot of the second supplementary sub-light S2 emitted from the fourth light emitting surface 1621 can roughly overlap with the second light emitting surface 1121 when propagating to the second light emitting surface 1121, so as to ensure the energy utilization efficiency of the second supplementary sub-light S2.

[0073] In some possible embodiments, the light source device 10 may further include a third collecting component 170, which is disposed between the third LED light source 160 and the light combining element 130, and is located on the optical path where the first sub-supplementary light S1 and the second sub-supplementary light S2 generated by the third LED light source 160 are located, and is used to collect the first sub-supplementary light S1 and the second sub-supplementary light S2 to improve the energy utilization efficiency of the first sub-supplementary light S1 and the second sub-supplementary light S2.

[0074] Specifically, the third collecting component 170 may include one or more collecting lenses, and the one or more collecting lenses are arranged on the optical path where the first supplementary sub-light S1 and the second supplementary sub-light S2 are located. Figure 5 In the embodiment shown, there are two collecting lenses, which are respectively a fifth collecting lens 1710 and a sixth collecting lens 1730. The fifth collecting lens 1710 and the sixth collecting lens 1730 are sequentially arranged at intervals along the optical path of the first sub-supplementary light S1 and the second sub-supplementary light S2 to improve the energy utilization efficiency of the first sub-supplementary light S1 and the second sub-supplementary light S2. As an implementation method, the fifth collecting lens 1710 and the sixth collecting lens 1730 can be positive lenses respectively.

[0075] In some possible embodiments, see Figure 8 The light source device 10 may further include a laser light source 180 and a reflector 182. The laser light source 180 is used to generate a specified laser L. As an embodiment, the laser light source 180 may include a laser unit, which is used to generate monochromatic laser, such as red laser, green laser, blue laser, etc.

[0076] As another embodiment, the laser light source 180 may include a plurality of laser units. Figure 8In the illustrated embodiment, the laser light source 180 may include a first laser unit 1801, a second laser unit 1803, and a third laser unit 1805, wherein the first laser unit 1801 is used to generate a red laser L1, the second laser unit 1803 is used to generate a green laser L2, and the third laser unit 1805 is used to generate a blue laser L3. Therefore, the laser light source 180 in this embodiment is a red, green, and blue three-color light source. That is, the designated laser L is a red, green, and blue three-color mixed laser. Specifically, the first laser unit 1801, the second laser unit 1803, and the third laser unit 1805 can be integrated in the same laser module to improve the overall integration of the laser light source 180.

[0077] In this embodiment, the reflector 182 is disposed on the optical path of the designated laser L and the designated combined light O, and is used to reflect the designated laser L so that the propagation directions of the designated laser L and the designated combined light O after reflection are the same. Figure 8 In the light source device 10 shown, the output light finally generated is a mixed light of laser and LED, which can further improve the imaging brightness of the projection device equipped with the light source device 10. Specifically, the reflector 182 can be a reflector.

[0078] In this embodiment, the light source device 10 may further include a controller 190, and the controller 190 is electrically connected to the first LED light source 110, the second LED light source 120, and the third LED light source 160. Specifically, the controller 190 may control a chip or a control circuit, and this embodiment does not limit the specific implementation of the controller 190.

[0079] In this embodiment, the controller 190 is configured to control the second LED light source 120 to generate a specified blue light LB when the light source device 10 is in the first working stage, wherein the first working stage refers to the working stage in which the light source device 10 generates blue light.

[0080] When the light source device 10 is in the second working stage, the first LED light source 110 is controlled to generate the first excitation light, and the third LED light source 160 is controlled to generate the first sub-supplementary light S1. The second working stage refers to the working stage in which the light source device 10 generates red light. At this time, the first excitation light and the first sub-supplementary light S1 simultaneously excite the fluorescent component 1130 to generate red fluorescent light FR.

[0081] When the light source device 10 is in the third working stage, the first LED light source 110 is controlled to generate the second excitation light, and the third LED light source 160 is controlled to generate the second sub-supplement light S2. The third working stage refers to the working stage in which the light source device 10 generates green light. At this time, the second excitation light and the second sub-supplement light S2 simultaneously excite the fluorescent component 1130 to generate green fluorescence FG.

[0082] It should be noted here that the first working stage, the second working stage and the third working stage belong to different stages of the same light combining cycle. In the light combining cycle, the light source device 10 generates blue, red and green light rays in sequence. That is, the light source device 10 can realize the RGB mode under the control of the controller 190, so that the optical imaging system subsequently equipped with the light source device 10 can modulate the above-mentioned blue, red and green light rays as primary colors, and then generate light rays carrying image information, that is, the projected image.

[0083] In some possible embodiments, the controller 190 is further configured to: when the light source device 10 is in the fourth working stage, control the second LED light source 120 to generate the specified blue light LB, control the first LED light source 110 to generate the second excitation light, and control the third LED light source 160 to generate the second sub-supplementary light S2. The fourth working stage refers to the working stage in which the light source device 10 generates cyan light. At this time, the second excitation light and the second sub-supplementary light S2 simultaneously excite the fluorescent component 1130 to generate green fluorescence FG, and the green fluorescence FG is mixed with the specified blue light LB to generate cyan light.

[0084] When the light source device 10 is in the fifth working stage, the first LED light source 110 is controlled to generate the first excitation light and the second excitation light, and the third LED light source 160 is controlled to generate the first sub-supplement light S1 and the second sub-supplement light S2. The fifth working stage refers to the working stage in which the light source device 10 generates yellow light. At this time, the first excitation light and the first sub-supplement light S1 simultaneously excite the fluorescent component 1130 to generate red fluorescence FR, and the second excitation light and the second sub-supplement light S2 simultaneously excite the fluorescent component 1130 to generate green fluorescence FG, and the green fluorescence FG is mixed with the red fluorescence FR to generate yellow light.

[0085] It should be noted here that the fourth working stage, the first working stage, the second working stage, the fifth working stage and the third working stage belong to different stages of the same light-combining cycle, in which the light source device 10 sequentially generates five colors of light: cyan, blue, red, yellow, and green. That is, the light source device 10 can realize the RGBCY mode under the control of the controller 190, so that the optical imaging system subsequently equipped with the light source device 10 can modulate the five colors of light: cyan, blue, red, yellow, and green as primary colors, and then generate light carrying image information, that is, a projected image. Since the primary colors in this embodiment have five colors, the color quality of the projected image can be improved.

[0086] In some possible embodiments, when the light source device 10 includes a laser light source 180, the controller 190 is also electrically connected to the laser light source 180. Taking the laser light source 180 as a red, green and blue three-color light source as an example, the controller 190 is also configured to: when the light source device 10 is in the first working stage, control the laser light source 180 to generate blue laser L3. When the light source device 10 is in the second working stage, control the laser light source 180 to generate red laser L1. When the light source device 10 is in the third working stage, control the laser light source 180 to generate green laser L2. When the light source device 10 is in the fourth working stage, control the laser light source 180 to generate blue laser L3 and green laser L2. When the light source device 10 is in the fifth working stage, control the laser light source 180 to generate red laser L1 and green laser L2.

[0087] See also Fig. 9 The embodiment of the present application also provides an optical imaging system 40, which is provided with the above-mentioned light source device 10, and can be widely used in projection equipment (for example, micro projectors, short-focus projectors, etc.). The optical imaging system 40 can also be widely used in laser equipment (for example, laser TVs, engineering projectors, laser mosaic walls, etc.), and as a supplementary light source in the above-mentioned laser equipment. Fig. 9 In the illustrated embodiment, the optical imaging system 40 may include the aforementioned light source device 10 , a relay module 410 , a prism module 420 , and a light modulator 430 .

[0088] The light source device 10 is used to generate a specified combined light O. The specific structure of the light source device 10 can refer to the relevant description in the above embodiment. The relay module 410 is arranged on the optical path where the specified combined light O is located, and plays a role in converging the specified combined light O. Specifically, the relay module 410 may include a single lens or a lens group composed of multiple lenses. Fig. 9 In the illustrated embodiment, the relay module 410 may include a first lens 4140 and a second lens 4160. The first lens 4140 and the second lens 4160 are sequentially arranged on the optical path where the designated light combination O is located, and the first lens 4140 and the second lens 4160 respectively play a converging role on the designated light combination O to improve the energy utilization efficiency of the designated light combination O. Specifically, the first lens 4140 and the second lens 4160 may be positive lenses, respectively.

[0089] exist Fig. 9In the illustrated embodiment, the relay module 410 may further include a light homogenizer 4120, which is disposed between the light source device 10 and the first lens 4140 and is located on the optical path where the designated light combination O is located, and plays a role in homogenizing the designated light combination O, so as to make the designated light combination O more uniform, thereby improving the imaging effect of the optical imaging system 40. Specifically, the light homogenizer 4120 may be a light homogenizer rod or a compound eye lens.

[0090] The prism module 420 is disposed between the lens module 410 and the light modulator 430, and is used to reflect the designated combined light O and focus it on the light modulator 430. The light modulator 430 is used to perform image modulation on the designated combined light O and form light carrying image information. The prism module 420 is also used to transmit the light carrying image information to a projection area, such as a wall, a projection screen, and the like.

[0091] Specifically, the light modulator 430 can be a digital micromirror device (DMD), which is composed of a digital micromirror array, each digital micromirror constitutes a modulation unit, and a modulation unit is used to modulate the image corresponding to a pixel. Each digital micromirror is flipped under the drive of the driving signal generated by the control device, and the number of flips of each digital micromirror is determined by the driving signal. The flipped digital micromirror modulates the light reflected by the prism module 420 and forms light carrying image information. In some other possible embodiments, the light modulator 430 can also be a HTPSLCD display chip, a reflective LCD device LCOS, etc. This embodiment does not limit the specific implementation method of the light modulator 430.

[0092] The embodiment of the present application provides a light source device 10 and an optical imaging system 40 equipped with the light source device 10, wherein the light source device 10 may include a first LED light source 110, a second LED light source 120 and a light combining member 130. The first LED light source 110 may include a first substrate 1100, a first chip 1110, a second chip 1120 and a fluorescent component 1130. The first chip 1110 and the second chip 1120 are arranged on the first substrate 1100, the first chip 1110 is used to generate a first excitation light, and the second chip 1120 is used to generate a second excitation light. The fluorescent component 1130 is arranged on the optical path where the first excitation light and the second excitation light are located, so that the fluorescent component 1130 generates red fluorescence FR under the excitation of the first excitation light, and the fluorescent component 1130 generates green fluorescence FG under the excitation of the second excitation light. The second LED light source 120 is used to generate a specified blue light LB. The light combining element 130 is arranged on the optical path of the red fluorescent light FR, the green fluorescent light FG and the designated blue light LB, and is used to guide the red fluorescent light FR, the green fluorescent light FG and the designated blue light LB to emit in the same direction to form the designated combined light O. Therefore, the light source device 10 in the present application can realize a red, green and blue three-color light source.

[0093] Since the first LED light source 110 in the present application can generate red fluorescence FR and green fluorescence FG, and the emission directions of the two fluorescences are the same, it is possible to combine the two light paths without setting a dichroic filter on the light path of the red fluorescence FR and the green fluorescence FG. On the one hand, one less dichroic filter can be set in the light source device 10, making the overall light path structure more compact. On the other hand, the red fluorescence FR and the green fluorescence FG are combined in time, which can avoid the loss of combined light caused by the overlap of the red and green light spectra, and ensure the energy utilization efficiency of the light by the projection device equipped with the light source device 10.

[0094] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0095] In the description of the present application, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", and "inside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely simplified descriptions for the convenience of describing the present application. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0096] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0097] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0098] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A light source device, characterized in that: include: A first LED light source comprises a first substrate, a first chip, a second chip and a fluorescent component; the first chip and the second chip are arranged on the first substrate, the first chip is used to generate a first excitation light, and the second chip is used to generate a second excitation light; the fluorescent component is arranged on an optical path where the first excitation light and the second excitation light are located, so that the fluorescent component generates red fluorescence under the excitation of the first excitation light, and generates green fluorescence under the excitation of the second excitation light; A second LED light source, used to generate a specified blue light; as well as The light combining component is arranged on the optical paths of the red fluorescence, the green fluorescence and the designated blue light, and is used for guiding the red fluorescence, the green fluorescence and the designated blue light to be emitted in the same direction to form designated combined light.

2. The light source device according to claim 1, characterized in that: The first chip and the second chip are arranged at intervals; the emission direction of the first excitation light is the same as the emission direction of the second excitation light; The first LED light source further includes an insulating member disposed between the first chip and the second chip.

3. The light source device according to claim 1, characterized in that: The fluorescent component comprises a red fluorescent component and a green fluorescent component, wherein the red fluorescent component is arranged on the optical path of the first excitation light so that the red fluorescent component generates the red fluorescence under the excitation of the first excitation light; The green fluorescent element is arranged on the optical path of the second excitation light, so that the green fluorescent element generates the green fluorescent light under the excitation of the second excitation light.

4. The light source device according to claim 1, characterized in that: The fluorescent component includes a yellow fluorescent element, a first filter element and a second filter element; The yellow fluorescent element is arranged on the optical path of the first excitation light and the second excitation light, so that the yellow fluorescent element generates a first yellow fluorescence under the excitation of the first excitation light, and generates a second yellow fluorescence under the excitation of the second excitation light; The first filter is disposed on the optical path where the first yellow fluorescence is located, and is used to transmit the red light component of the first yellow fluorescence to generate the red fluorescence; The second filter is disposed on the optical path where the second yellow fluorescence is located, and is used to transmit the green light component in the second yellow fluorescence to generate the green fluorescence.

5. The light source device according to any one of claims 1 to 4, characterized in that: The light combining element is used to transmit the red fluorescence and the green fluorescence and reflect the designated blue light to form the designated combined light; The light source device further includes a third LED light source, and the third LED light source is used to generate supplementary light, and the wavelength bands of the supplementary light, the designated blue light, the first excitation light, and the second excitation light all belong to the wavelength band where the blue light is located; The light combining element is further arranged on the optical path where the supplementary light is located, and is used for reflecting the supplementary light to the first chip and the second chip.

6. The light source device according to claim 5, characterized in that: The third LED light source includes a second substrate, a third chip and a fourth chip; the third chip and the fourth chip are arranged on the second substrate, the third chip is used to generate a first sub-supplementary light, and the fourth chip is used to generate a second sub-supplementary light; The light combining element is disposed on the optical path where the first sub-supplement light and the second sub-supplement light are located, and is used to reflect the first sub-supplement light to the first chip, and reflect the second sub-supplement light to the second chip.

7. The light source device according to claim 6, characterized in that: The first chip and the second chip are spaced apart in a specified direction, and the distance between the first chip and the second chip is a first distance; The third chip and the fourth chip are spaced apart in the specified direction, and the distance between the third chip and the fourth chip is a second distance; the absolute value of the distance difference between the second distance and the first distance is less than or equal to the specified distance.

8. The light source device according to claim 6, characterized in that: The first chip is provided with a first light emitting surface, the third chip is provided with a third light emitting surface, and the ratio of the area of ​​the third light emitting surface to the area of ​​the first light emitting surface is greater than or equal to 0.75 and less than or equal to 0.98; or / and The second chip is provided with a second light emitting surface, the fourth chip is provided with a fourth light emitting surface, and the ratio of the area of ​​the fourth light emitting surface to the area of ​​the second light emitting surface is greater than or equal to 0.75 and less than or equal to 0.

98.

9. The light source device according to any one of claims 1 to 4, characterized in that: The light source device further comprises a laser light source and a reflector; the laser light source is used to generate a specified laser; The reflector is disposed on the optical path of the designated laser and the designated combined light, and is used to reflect the designated laser so that the designated laser and the designated combined light have the same propagation direction after reflection.

10. An optical imaging system, characterized in that: include: The light source device according to any one of claims 1 to 9, wherein the light source device is used to generate a specified combined light; as well as The optical modulator is arranged on the optical path where the designated combined light is located.

Images