Light source device, display device and lighting device

Abstract

The present invention provides a light source device, a display device and an illumination device, wherein the light source device comprises: a first light source assembly, the first light source assembly is used to emit a first light source beam; a second light source assembly, the second light source assembly is used to emit a second light source beam; a coupling assembly, the coupling assembly is used to couple the first light source beam and the second light source beam into a first light beam; a converging assembly, the converging assembly is used to converge the first light beam into a second light beam; a light rod, the light rod is used to perform uniform field shaping processing on the second light beam; wherein the coupling assembly comprises an energy beam splitter and a reflector; the energy beam splitter has a first surface and a second surface opposite to each other; the energy beam splitter is based on a set beam splitting ratio, so that a part of the incident light is reflected and a part is transmitted. By applying the technical solution provided by the present invention, the utilization rate of light energy is improved, and the uniform field effect can be improved without using a special-shaped light rod.

Description

Technical Field

[0001] The present invention relates to the field of laser application technology, and more specifically, to a light source device, a display device and a lighting device. Background Art

[0002] Laser has the characteristics of high brightness, small wavelength width and small optical extension, and has broad application prospects in the fields of laser display and laser lighting.

[0003] Laser spectroscopy has many advantages, but it has the problems of speckle and low display index, which can be solved by coupling with wide-spectrum fluorescence. In the prior art, when laser beams and wide-spectrum fluorescence are coupled, part of the light waves will be wasted. Summary of the invention

[0004] In view of this, the present invention provides a light source device, a display apparatus and a lighting device, thereby improving the utilization rate of light energy.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A light source device, comprising:

[0007] A first light source assembly, the first light source assembly is used to emit a first light source light beam;

[0008] A second light source assembly, the second light source assembly is used to emit a second light source light beam;

[0009] A coupling component, wherein the coupling component is used to couple the first light source light beam and the second light source light beam into a first light beam;

[0010] A converging component, the converging component is used to converge the first light beam into a second light beam;

[0011] A light rod, wherein the light rod is used to perform a shimming and shaping process on the second light beam;

[0012] Among them, one of the first light source beam and the second light source beam is a laser beam, and the other is a wide-spectrum fluorescence; the coupling component includes an energy beam splitter and a reflector; the energy beam splitter has a first surface and a second surface opposite to each other; the energy beam splitter reflects a part of the incident light and transmits a part of it based on a set beam splitting ratio; the first surface is on the irradiation path of the first light source beam, so that a part of the first light source beam passes through the energy beam splitter and enters the converging component, and another part of the first light source beam passes through the energy beam splitter and the reflector in sequence and is reflected to the converging component; the second surface is on the irradiation path of the second light source beam, so that a part of the second light source beam passes through the energy beam splitter and is reflected to the converging component through the reflector, and another part of the second light source beam is reflected to the converging component through the energy beam splitter.

[0013] Preferably, in the above light source device, the converging component is located between the coupling component and the light rod, and the converging component and the light rod have the same optical axis;

[0014] The reflector and the energy beam splitter both have an angle of 45° with the optical axis, and are arranged opposite to each other in a direction perpendicular to the optical axis, and the reflective surface and the second surface of the reflector both face the converging component;

[0015] The light emitting direction of the first light source assembly is toward the first surface and parallel to the optical axis, and the light emitting direction of the second light source assembly is toward the second surface and perpendicular to the optical axis.

[0016] Preferably, in the above light source device, the first light source light beam emitted by the first light source assembly completely illuminates the first surface, and the second light source light beam emitted by the second light source assembly completely illuminates the second surface.

[0017] Preferably, in the above light source device, the first light source light beam emitted by the first light source assembly completely irradiates the first surface;

[0018] A portion of the second light source light beam emitted by the second light source assembly irradiates the second surface, and another portion directly irradiates the reflector;

[0019] Wherein, the first light source beam is a laser beam.

[0020] Preferably, in the above-mentioned light source device, the energy beam splitter includes: a transparent substrate and a beam splitting film arranged on the surface of the transparent substrate, the beam splitting ratio of the beam splitting film is X:Y, which is used to allow X% of the incident light to pass through and Y% of the incident light to be reflected, X+Y=100.

[0021] Preferably, in the above-mentioned light source device, the second light source assembly comprises: a set laser light source for emitting laser light of a preset color; and a fluorescent element for emitting fluorescence based on the laser light of the preset color.

[0022] Preferably, in the above light source device, the fluorescent element is a ceramic fluorescent material, or a crystal fluorescent material, or a fluorescent body of an inorganic glue mixed with fluorescent powder.

[0023] Preferably, in the above light source device, the first light source beam is a laser beam, including one or more of red laser, green laser and blue laser;

[0024] The second light source beam is a broad spectrum fluorescent light including at least part of visible light;

[0025] The first light source beam and the second light source beam have an overlapping wavelength band, and a spectral width of a continuous spectrum in the first light source beam including the overlapping wavelength band is smaller than a spectral width of a continuous spectrum in the second light source beam including the overlapping wavelength band.

[0026] The present invention further provides a display device, comprising any one of the light source devices described above.

[0027] The present invention further provides a lighting device, comprising any one of the light source devices described above.

[0028] It can be known from the above description that in the light source device, display device and lighting device provided by the technical solution of the present invention, the coupling component is located between the first light source component and the converging component, wherein the coupling component includes an energy beam splitter and a reflector, and the energy beam splitter is based on a set beam splitting ratio so that part of the incident light is reflected and part is transmitted. In this solution, the first light source beam and the second light source beam are coupled into a first light beam through the energy beam splitter and the reflector, and are incident on the converging component, and the converging component converges the first light beam into a second light beam, and is incident on the light rod for uniform field shaping, thereby improving the utilization rate of light energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0030] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0031] Figure 1 It is a light path diagram of a traditional light source device;

[0032] Figure 2 for Figure 1 A schematic diagram of the structure of the middle element 3;

[0033] Figure 3 is a light path diagram of another conventional light source device;

[0034] Figure 4 This is a light path diagram of another traditional light source device;

[0035] Figure 5 This is a light path diagram of another traditional light source device;

[0036] Figure 6 A light path diagram of a light source device provided by an embodiment of the present invention;

[0037] Figure 7 A light path diagram of another light source device provided by an embodiment of the present invention;

[0038] Figure 8 A schematic diagram of the splitting principle of an energy beam splitter with a splitting ratio of 50:50 provided in an embodiment of the present invention;

[0039] Fig. 9 A schematic diagram of a coating structure of an energy beam splitter provided in an embodiment of the present invention;

[0040] Fig.10 A light path diagram of another light source device provided by an embodiment of the present invention;

[0041] Fig.11 A wavelength transmission curve diagram provided by an embodiment of the present invention;

[0042] Fig.12 Wavelength reflection curve diagram provided for the embodiment of the present invention

[0043] Fig.13 A spectrum diagram of a second light source light beam provided by an embodiment of the present invention;

[0044] Fig.14 A spectrum diagram of the first light source light beam provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] refer to Figure 1 and Figure 2 , Figure 1 This is a light path diagram of a traditional light source device. Figure 2 for Figure 1 The structural diagram of the element 3 is shown in FIG. Figure 1 As shown, light sources 1-1 to 1-4 are RGB laser light sources. After coupling and shaping inside the light source module, the output light here is parallel light. The number of light sources can be increased or decreased according to actual needs. The wavelength range is B (blue light): 440 to 470nm, G (green light): 520 to 540nm, R (red light): 630 to 650nm. Element 2 is a plano-convex lens for converging the parallel light emitted by light sources 1-1 to 1-4. Element 3 is a special-shaped solid light rod (such as Figure 2 As shown), element 4 is a plano-convex lens, used to converge the parallel light output by the light source 5, wherein the light source 5 is a wide-spectrum fluorescence, such as fluorescence excited by laser bombardment of different fluorescent materials, or a wide-spectrum LED light source, but is not limited to these two light sources. The light source is coupled and shaped inside the light source module, and the output light here is parallel light. The commonly used fluorescence spectrum in the display field is 470nm~780nm.

[0047] like Figure 2 As shown, the S1 surface is an oblique angle surface, coated with a reflective film, the S2 surface is coated with an anti-reflection film, and the anti-reflection wavelength corresponds to the band included in the light source 1-1 to 1-4, and the S3 surface specifies an area (such as Figure 2 The dotted ellipse area) is coated with an anti-reflection film, and the anti-reflection wavelength is the band included in the corresponding light source 5. The S4 surface is coated with an anti-reflection film, and the wavelength is the band included in the system. The other surfaces are not coated. When the acute angle between the S1 surface and the S2 surface is 45°, the uniform field effect is better. In addition, the size of the coating area specified by the S3 surface can be determined according to the size of the incident light spot, and the coating area must be larger than the incident light spot area. Among them, the light source is not limited to parallel light or non-parallel light. If element 2 and element 4 are included in the light source part as a whole, it becomes convergent light. The optical path positions of light sources 1-1 to 1-4 and light source 5 can be interchanged, and the coating is changed accordingly.

[0048] Figure 1In the shown method, the mixed color laser output by light sources 1-1 to 1-4 is parallel light. After passing through element 2, the light converges and then passes through the S2 surface of element 3 to enter element 3. On the other hand, the wide spectrum parallel light output by light source 5 passes through element 4. After the light converges, it is projected into the S1 reflective surface through the designated area of ​​the S3 surface of element 3. The light from light sources 1-1 to 1-4 and light source 5 is continuously internally reflected in element 3, which plays the role of uniform field, and finally emerges through the S4 surface of element 3.

[0049] exist Figure 1 and Figure 2 In the illustrated method, although efficient coupling of the two light sources can be achieved to avoid waste of light waves, the two light sources are poorly fused and the field uniformity is poor, and a special-shaped solid light rod needs to be provided as element 3, which increases the difficulty of alignment installation of the system and the complexity of the device structure.

[0050] refer to Figure 3 and Figure 4 , Figure 3 This is the light path diagram of another traditional light source device. Figure 4 This is a light path diagram of another traditional light source device. Figure 3 and Figure 4 based on Figure 1 Component 3 is optimized and changed into a combination of multiple light rods, such as Figure 3 The 3-1 combination plan and Figure 4 The 3-2 combination scheme, or other schemes that change position or angle.

[0051] like Figure 3 As shown, the combination 3-1 consists of a single wedge-shaped light rod 7 and two rectangular light rods 6 and 8. The incident end and the exit end of the light rod 6 are plated with anti-reflection films of the corresponding wavelength bands, the wedge-shaped surface of the light rod 7 is plated with a reflective film, the incident area and the exit surface are plated with anti-reflection films, and the incident end and the exit end of the light rod 8 are plated with anti-reflection films. Among them, the combined length and width of the exit surfaces of the light rods 6 and 7 are required to be less than or equal to the length and width of the incident end of the light rod 8.

[0052] Figure 3 In the illustrated method, the mixed color laser light output by the light sources 1-1 to 1-4 is parallel light, which passes through the element 2, converges, passes through the light rod 6, and enters the light rod 8; on the other hand, the wide spectrum parallel light output by the light source 5 passes through the element 4, converges, and is projected into the wedge-shaped surface of the light rod 7 through the incident area of ​​the light rod 7, and enters the light rod 8 after reflection. The light from the light sources 1-1 to 1-4 and the light source 5 is continuously internally reflected in the light rod 8, which plays the role of uniform field, and finally exits through the exit end of the light rod 8.

[0053] like Figure 4As shown, the combination 3-2 consists of a double wedge-shaped light rod 9 and two rectangular light rods 6 and 8. The incident end and the exit end of the light rod 6 are plated with anti-reflection films of the corresponding wavelength band, the incident end and the exit end of the light rod 8 are plated with anti-reflection films, the two wedge-shaped surfaces of the double wedge-shaped light rod 9 are plated with reflective films, and the incident and exit areas are plated with anti-reflection films. The combined length and width of the exit surfaces of the light rods 6 and 9 are required to be less than or equal to the length and width of the incident end of 8.

[0054] Figure 4 In the illustrated method, the mixed color laser light output by the light sources 1-1 to 1-4 is parallel light, which passes through the element 2, converges, enters the light rod 9 through the incident end of the light rod 9, and enters the light rod 8 through the exit end of the light rod 9; on the other hand, the wide spectrum parallel light output by the light source 5 passes through the element 4, converges, passes through the light rod 6, and enters the light rod 8. The light from the light sources 1-1 to 1-4 and the light source 5 is continuously internally reflected in the light rod 8, which plays a role in uniform field, and finally exits through the exit end of the light rod 8.

[0055] Likewise, in Figure 3 and Figure 4 In the two methods shown, although efficient coupling of the two light sources can be achieved to avoid the waste of light waves, the output light beams of the two light sources are in different areas of the light-entering end face of the incident light rod 8, and the fusion of the two light sources is poor, the field is not good, and a special-shaped solid light rod needs to be set as the element 3, which increases the difficulty of the system's alignment installation and the complexity of the device structure. The structure is relatively complex and the cost is high.

[0056] In summary, in Figure 1-Figure 4 In the conventional technologies shown, special-shaped light rods are required, which leads to the difficulty of system alignment and installation and the complexity of device structure, and the problem of complex structure and high cost. Moreover, the two light sources are incident on different areas of the coupling element, such as Figure 1 and Figure 2 In this method, two light sources are incident on different areas of the same side of the element 3, such as Figure 3 and Figure 4 In this method, the two light sources are incident on different areas of the same side of the light rod 8, which will result in poor fusion of the laser light source and the wide spectrum light source and poor field shimming.

[0057] In order to avoid using special-shaped light rods and improve the uniformity of light source coupling, Figure 5 The method shown.

[0058] refer to Figure 5 , Figure 5 FIG. 2 is another light path diagram of a traditional light source device. Figure 5As shown, light sources 1-1 to 1-4 are RGB laser light sources. After coupling and shaping inside the light source module, the output light here is parallel light. The number of light sources can be increased or decreased according to actual needs. The wavelength range is B: 440-470nm, G: 520-540nm, R: 630-650nm. Component 1-5 is a beam combiner that reflects yellow and transmits red, green and blue. The RGB light emitted by light sources 1-1 to 1-4 is transmitted, and part of the light emitted by light source 1-6 is reflected, and the spectrum projection loss overlapped with RG is lost. Component 1-7 is a plano-convex lens that converges the mixed light. Component 1-8 is a light rod. After convergence, the mixed light enters the light rod uniform field. Among them, light source 1-6 is a wide-spectrum fluorescence, such as fluorescence excited by laser bombardment of different fluorescent materials. After coupling and shaping inside the light source module, the output light here is parallel light. The commonly used fluorescence spectrum in the display field is 470nm-780nm.

[0059] Figure 5 In the manner shown, the use of element 1-5 can couple the two light sources before entering element 1-8, thereby improving the coupling uniformity of the two light sources and improving the uniform field effect. However, since the wavelengths of light sources 1-1 to 1-4 and light source 1-6 overlap, in this manner, only the light waves corresponding to the overlapping portion of one of light sources 1-1 to 1-4 or light source 1-6 can enter element 1-8, while the light waves corresponding to the overlapping portion of the other light source are wasted. Therefore, a portion of the light energy of the overlapping portion is lost, resulting in low efficiency, and the energy utilization rate of wide-spectrum fluorescence is only about 30%.

[0060] Therefore, in order to solve the above problems, an embodiment of the present invention provides a light source device, a display device and a lighting device, wherein the light source device includes:

[0061] A first light source assembly, the first light source assembly is used to emit a first light source light beam;

[0062] A second light source assembly, the second light source assembly is used to emit a second light source light beam;

[0063] A coupling component, wherein the coupling component is used to couple the first light source light beam and the second light source light beam into a first light beam;

[0064] A converging component, the converging component is used to converge the first light beam into a second light beam;

[0065] A light rod, wherein the light rod is used to perform a shimming and shaping process on the second light beam;

[0066] Among them, one of the first light source beam and the second light source beam is a laser beam, and the other is a wide-spectrum fluorescence; the coupling component includes an energy beam splitter and a reflector; the energy beam splitter has a first surface and a second surface opposite to each other; the energy beam splitter reflects a part of the incident light and transmits a part of it based on a set beam splitting ratio; the first surface is on the irradiation path of the first light source beam, so that a part of the first light source beam passes through the energy beam splitter and enters the converging component, and another part of the first light source beam passes through the energy beam splitter and the reflector in sequence and is reflected to the converging component; the second surface is on the irradiation path of the second light source beam, so that a part of the second light source beam passes through the energy beam splitter and is reflected to the converging component through the reflector, and another part of the second light source beam is reflected to the converging component through the energy beam splitter.

[0067] It can be seen that in the light source device, display device and lighting device provided by the technical solution of the present invention, the coupling component is located between the first light source component and the converging component, wherein the coupling component includes an energy beam splitter and a reflector, and the energy beam splitter is based on a set beam splitting ratio so that part of the incident light is reflected and part is transmitted. In this solution, the first light source beam and the second light source beam are coupled into a first light beam through the energy beam splitter and the reflector, and are incident on the converging component, and the converging component converges the first light beam into a second light beam, and is incident on the light rod for uniform field shaping, thereby improving the utilization rate of light energy.

[0068] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0069] refer to Figure 6 , Figure 6 A light path diagram of a light source device provided by an embodiment of the present invention, such as Figure 6 As shown, the light source device comprises:

[0070] A first light source component 2-1, the first light source component 2-1 is used to emit a first light source light beam; a second light source component 2-4, the second light source component 2-4 is used to emit a second light source light beam; a coupling component 2-7, the coupling component 2-7 is used to couple the first light source light beam and the second light source light beam into a first light beam; a converging component 2-5, the converging component 2-5 is used to converge the first light beam into a second light beam; and a light rod 2-6, the light rod 2-6 is used to perform uniform field shaping processing on the second light beam.

[0071] Among them, one of the first light source beam and the second light source beam is a laser beam, and the other is a wide-spectrum fluorescence; the coupling component 2-7 includes an energy beam splitter 2-3 and a reflector 2-2; the energy beam splitter 2-3 has opposite first and second surfaces; the energy beam splitter 2-3 reflects part of the incident light and transmits part of it based on the set splitting ratio; the first surface is on the irradiation path of the first light source beam, so that a part of the first light source beam passes through the energy beam splitter 2-3 and is incident on the converging component 2-5, and another part of the first light source beam passes through the energy beam splitter 2-3 and the reflector 2-2 in turn and is reflected to the converging component 2-5; the second surface is on the irradiation path of the second light source beam, so that a part of the second light source beam passes through the energy beam splitter 2-3 and is reflected to the converging component 2-5 through the reflector 2-2, and another part of the second light source beam is reflected to the converging component 2-5 through the energy beam splitter 2-3.

[0072] In the embodiment of the present invention, the first light source assembly emits a laser beam and the second light source assembly emits a wide-spectrum fluorescence. In other embodiments, the first light source assembly may emit a wide-spectrum fluorescence and the second light source assembly may emit a laser beam.

[0073] Among them, the converging component 2-5 is located between the coupling component 2-7 and the light rod 2-6, and the converging component 2-5 and the light rod 2-6 have the same optical axis; the reflector 2-2 and the energy beam splitter 2-3 both have an angle of 45° with the optical axis, and the two are arranged relative to each other in a direction perpendicular to the optical axis, and the reflecting surface of the reflector 2-2 and the second surface are both facing the converging component 2-5; the light emitting direction of the first light source component 2-1 is toward the first surface and parallel to the optical axis, and the light emitting direction of the second light source component 2-4 is toward the second surface and perpendicular to the optical axis.

[0074] like Figure 6 As shown, the first light source light beam emitted by the first light source assembly 2 - 1 completely illuminates the first surface, and the second light source light beam emitted by the second light source assembly 2 - 4 completely illuminates the second surface.

[0075] Figure 6In the illustrated manner, the first light source beam output by the first light source assembly 2-1 is parallel light, passing through the first surface of the energy beam splitter 2-3, a portion of the first light source beam passes through the energy beam splitter 2-3 and is incident on the convergence assembly 2-5, and another portion of the first light source beam passes through the energy beam splitter 2-3 and the reflector 2-2 in sequence, and is reflected to the convergence assembly 2-5. On the other hand, the second light source beam output by the second light source assembly 2-4 is parallel light, passing through the second surface of the energy beam splitter 2-3, a portion of the second light source beam passes through the energy beam splitter 2-3, and is reflected to the convergence assembly 2-5 by the reflector 2-2, and another portion of the second light source beam passes through the energy beam splitter 2-3 and is reflected to the convergence assembly 2-5. The coupling assembly 2-7 couples the first light source beam and the second light source beam into a first light beam, and is incident on the convergence assembly 2-5, and after being converged into a second light beam by the convergence assembly 2-5, it is incident on the light rod 2-6. The first light source light beam and the second light source light beam are continuously internally reflected and uniformly shaped in the light rod 2 - 6 , and finally emitted from the emission end of the light rod 2 - 6 .

[0076] Figure 6 In the manner shown, the first light source beam completely illuminates the first surface, the second light source beam completely illuminates the second surface, and the energy beam splitter 2-3 and the reflector 2-2 are arranged completely opposite to each other, so that the volume of the coupling component 2-7 can be reduced.

[0077] like Figure 7 As shown, Figure 7 In the optical path diagram of another light source device provided in an embodiment of the present invention, the first light source light beam emitted by the first light source assembly 2-1 completely irradiates the first surface; the second light source light beam emitted by the second light source assembly 2-4 is divided into two parts, one part irradiates the second surface, and the other part directly irradiates the reflector 2-2. The first light source light beam is a laser beam.

[0078] Figure 7In the illustrated manner, the first light source beam output by the first light source assembly 2-1 is parallel light. After completely irradiating the first surface of the energy beam splitter 2-3, a portion of the first light source beam passes through the first surface of the energy beam splitter 2-3 and is incident on the convergence assembly 2-5, and another portion of the first light source beam passes through the energy beam splitter 2-3 and the reflector 2-2 in sequence and is reflected to the convergence assembly 2-5. The second light source beam output by the second light source assembly 2-4 is parallel light and is divided into two parts: a portion of the second light source beam is incident on the second surface of the energy beam splitter 2-3, and is divided into two paths by the energy beam splitter 2-3, one of which passes through the energy beam splitter 2-3, is incident on the reflector 2-2, and is then reflected to the convergence assembly 2-5; the other portion of the second light source beam is directly incident on the reflector 2-2, and is reflected to the convergence assembly 2-5 by the reflector 2-2. The coupling assembly 2-7 couples the first light source beam and the second light source beam into a first light beam, and is incident on the convergence assembly 2-5. After being converged into a second light beam by the convergence assembly 2-5, it is incident on the light rod 2-6. The first light source light beam and the second light source light beam are continuously internally reflected and uniformly shaped in the light rod 2 - 6 , and finally emitted from the emission end of the light rod 2 - 6 .

[0079] Figure 7 In the illustrated embodiment, the energy beam splitter 2-3 is arranged parallel to the reflector 2-2, and the lower end of the energy beam splitter 2-3 is close to the converging component 2-5 relative to the lower end of the reflector 2-2, thereby exposing a portion of the lower end of the reflector 2-2. The entire first surface or the second surface of the energy beam splitter 2-3 is coated with a beam splitting film, and the second light source beam is divided into two parts, one part directly enters the reflector 2-2, and the other part enters the energy beam splitter 2-3.

[0080] The first light source beam is a laser beam, and the second light source beam is a broad spectrum fluorescence. Since the broad spectrum fluorescence spot size is large and the divergence angle is large, Figure 7 The method shown can allow a portion of the wide-spectrum fluorescence to directly irradiate the reflector 2-2, and the other portion of the wide-spectrum fluorescence to irradiate the energy beam splitter 2-3, and the energy beam splitter 2-3 performs wavelength-selective reflection and transmission, thereby reducing the problem of large difference in incident angles between the laser beam and the wide-spectrum fluorescence beam caused by the converging spot, and further improving the uniform field effect.

[0081] The overlapping area of ​​the reflector 2-2 and the energy beam splitter 2-3 can be set to adjust the ratio of the light beam directly incident on the reflector 2-2 and the light beam directly incident on the energy beam splitter 2-3 in the second light source light beam, so as to select the best light splitting ratio for uniform field effect.

[0082] It should be noted that in this case, the light rods 2-6 are columns, such as cubic light rods or cylindrical light rods, and the front and rear end faces and side faces are all vertical. The technical solution of the present invention does not need to use special-shaped light rods, and the device structure is simple.

[0083] In the embodiment of the present invention, the energy beam splitter 2-3 comprises: a transparent substrate and a beam splitting film arranged on the surface of the transparent substrate, the beam splitting film has a beam splitting ratio of X:Y, and is used to allow X% of the incident light to pass through and Y% of the incident light to be reflected, X+Y=100. The transparent substrate can be a glass plate or a transparent plastic plate.

[0084] like Figure 8 As shown, Figure 8 A schematic diagram of the splitting principle of an energy beam splitter with a splitting ratio of 50:50 provided in an embodiment of the present invention, Figure 8 The medium energy beam splitter has a beam splitting film with a beam splitting ratio of 50:50, that is, 50% of the incident light is transmitted and 50% is reflected. In other embodiments, other beam splitting ratios may also be used, such as 40:60, 30:70, etc.

[0085] In the energy beam splitter 2-3, one of the first surface and the second surface is coated with a beam splitting film, and the other is coated with an anti-reflection film. The beam splitting film can split a light beam with a wavelength of 400nm to 780nm based on the splitting ratio, and the anti-reflection film increases the transmittance of the light beam with a wavelength of 400nm to 780nm.

[0086] In the embodiment of the present invention, when the first light source beam passes through the energy beam splitter 2-3, it has 50% reflection and 50% transmission, and when the second light source beam passes through the energy beam splitter 2-3, it has 50% reflection and 50% transmission. Since the second light source beam has a larger divergence angle, the converged light spot is larger than the first light source beam.

[0087] In order to effectively control the focusing spot and the incident angle, the coating structure of the energy beam splitter 2-3 can also be as follows: Fig. 9 and Fig.10 As shown, Fig. 9 A schematic diagram of a coating structure of an energy beam splitter provided in an embodiment of the present invention, Fig. 9 It is a top view of the energy beam splitter 2-3. Fig.10 A light path diagram of another light source device provided in an embodiment of the present invention, Fig.10 The light source device shown adopts Fig. 9 Energy beam splitter 2-3 of the structure shown.

[0088] The energy beam splitter 2-3 is arranged parallel to the reflector 2-2. Fig. 9As shown, the upper half of the energy beam splitter 2-3 is coated with a 50:50 beam splitter film 01, and the lower half is coated with a reflective film 02. The upper half of the energy beam splitter 2-3 is arranged opposite to the lower half of the reflector 2-2, exposing the lower half of the reflector 2-2. The beam splitter film 01 and the reflective film 02 can each occupy half of the corresponding surface of the energy beam splitter 2-3. In other ways, the two can also divide the surface into different proportions of splitting areas and reflection areas.

[0089] The first light source beam is irradiated to the upper part of the energy beam splitter 2-3, and is divided into two parts by the beam splitter film 01. One part passes through the upper part of the energy beam splitter 2-3 and is incident on the converging component 2-5, and the other part is reflected by the upper part of the energy beam splitter 2-3 to the reflector 2-2, and then reflected to the converging component 2-5.

[0090] The second light source beam is divided into three parts. The first part directly irradiates the reflector 2-2 and is reflected to the converging component 2-5. The second part irradiates the lower half of the energy beam splitter 2-3 and is reflected to the converging component 2-5 through the reflective film 02. The third part irradiates the upper half of the energy beam splitter 2-3 and is divided into two paths through the beam splitter film 01. One path passes through the upper half of the energy beam splitter 2-3 and is incident on the converging component 2-5, and the other path passes through the upper half of the energy beam splitter 2-3 and is reflected to the reflector 2-2, and then reflected to the converging component 2-5.

[0091] Taking the second light source beam as a wide-spectrum fluorescence as an example, since the beam and divergence angle of the second light source beam are larger, the converged light spot is larger than that of the first light source beam. In this way, the converged light spot and the incident angle can be effectively controlled, and the uniform field effect is better.

[0092] In an embodiment of the present invention, the energy beam splitter 2-3 is based on energy beam splitting. For example, if the incident light contains a 500nm light wave and a 600nm light wave, the 500nm light wave is based on a beam splitting ratio in which a portion is transmitted and a portion is reflected, and the 600nm light wave is based on a beam splitting ratio in which a portion is transmitted and a portion is reflected.

[0093] like Fig.11 and Fig.12 As shown, Fig.11 The transmission curve diagram of the wavelength provided by the embodiment of the present invention, Fig.12 The wavelength reflection curve diagram provided by the embodiment of the present invention, 03 is the P polarized light curve, 04 is the non-polarized light curve, and 05 is the S polarized light curve. Fig.11 and Fig.12It can be seen that in the visible light band, for a beam splitting film with a splitting ratio of 50:50, the transmission and reflection ratio of non-polarized light is equal to 50:50. Non-polarized light includes two linearly polarized lights, P polarized light and S polarized light. The transmission and reflection ratio of non-polarized light superimposed by the two polarized lights is also equal to 50:50.

[0094] In the embodiment of the present invention, the second light source assembly 2 - 4 includes: a set laser light source for emitting laser light of a preset color; and a fluorescent element for emitting fluorescence based on the laser light of the preset color.

[0095] Wherein, the fluorescent element is a ceramic fluorescent material, a crystal fluorescent material, or a fluorescent body of inorganic glue mixed with fluorescent powder.

[0096] It should be noted that the preset color laser emitted by the laser light source can be set based on demand, and the desired color visible light can be obtained by selecting the laser emission color and the phosphor material.

[0097] In an embodiment of the present invention, the first light source beam is a laser beam, including one or more of a red laser, a green laser and a blue laser; the second light source beam is a wide-spectrum fluorescence, including at least part of visible light, for example, may include the entire visible light spectrum; the first light source beam and the second light source beam have overlapping bands, and the spectral width of the continuous spectrum including the overlapping band in the first light source beam is smaller than the spectral width of the continuous spectrum including the overlapping band in the second light source beam.

[0098] If the overlapping band of the first light source beam and the second light source beam is red light, then the width of the red light band in the first light source beam is smaller than the width of the red light band in the second light source beam. If the overlapping band of the first light source beam and the second light source beam is blue light, then the width of the blue light band in the first light source beam is smaller than the width of the blue light band in the second light source beam. If the overlapping band of the first light source beam and the second light source beam is green light, then the width of the green light band in the first light source beam is smaller than the width of the green light band in the second light source beam. It should be noted that the overlapping band of the first light source beam and the second light source beam can be set based on demand, and is not limited to the overlap of the three primary colors of red, green and blue, but can also be other overlapping bands, such as yellow light.

[0099] The spectrum of the second light source beam is as follows: Fig.13 As shown, Fig.13 The spectrum diagram of the second light source beam provided in the embodiment of the present invention has the wavelength on the horizontal axis and the normalized intensity on the vertical axis. The wavelength of the second light source beam is between 470 nm and 780 nm.

[0100] The spectrum of the first light source beam is Fig.14 As shown, Fig.14The spectrum diagram of the first light source beam provided in an embodiment of the present invention has the wavelength on the horizontal axis and the normalized intensity on the vertical axis. The wavelength range of the blue light 11 is 440-470nm, the wavelength range of the green light 12 is 520-540nm, and the wavelength range of the red light 13 is 630-650nm.

[0101] In the embodiment of the present invention, an energy beam splitter and a reflector are superimposed to combine the first light source light beam and the second light source light beam. Conventional lenses are used in the optical path, which are low in cost and have no light loss. The first light source light beam and the second light source light beam are both incident perpendicular to the light rod, so that the light spot is small when entering the light rod and the angle is controllable, which improves the uniform field effect and thus improves the utilization rate of light energy.

[0102] It can be known from the above description that in the light source device provided by the technical solution of the present invention, the coupling component is located between the first light source component and the converging component, wherein the coupling component includes an energy beam splitter and a reflector, and the energy beam splitter is based on a set beam splitting ratio so that part of the incident light is reflected and part is transmitted. In this solution, the first light source beam and the second light source beam are coupled into a first light beam through the energy beam splitter and the reflector, and are incident on the converging component, and the converging component converges the first light beam into a second light beam, and is incident on the light rod for uniform field shaping, thereby improving the utilization rate of light energy.

[0103] Based on the above embodiments, another embodiment of the present invention further provides a display device, the display device comprising the light source device described in the above embodiments. It should be noted that the display device of the above embodiments of the present application may be an LCD display device.

[0104] The display device in the embodiment of the present invention can be an electronic device with display function such as a mobile phone, a computer and a television. The display device adopts the above light source device, which has the advantages of good field shimming effect and high light energy utilization rate.

[0105] Based on the above embodiments, another embodiment of the present invention further provides a lighting device, which includes the light source device described in the above embodiments. It should be noted that the lighting device of the above embodiments of the present application may be a backlight module.

[0106] The lighting device described in the embodiment of the present invention may be a lighting device such as a lamp. The lighting device adopts the above light source device, which has the advantages of good field shimming effect and high light energy utilization rate.

[0107] In this specification, each embodiment is described in a progressive, parallel, or progressive and parallel manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the display device and lighting device disclosed in the embodiment, since they correspond to the light source device disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the description of the light source device.

[0108] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises", "comprising" or any other variants thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of further restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the article or device including the above elements.

[0109] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A light source device, characterized in that: The light source device comprises: A first light source assembly, the first light source assembly is used to emit a first light source light beam; A second light source assembly, the second light source assembly is used to emit a second light source light beam; A coupling component, wherein the coupling component is used to couple the first light source light beam and the second light source light beam into a first light beam; A converging component, the converging component is used to converge the first light beam into a second light beam; A light rod, the light rod is used to perform a uniform field shaping process on the second light beam; the light rod is a cylinder, the front end face of the light rod is perpendicular to the side face, and the rear end face of the light rod is perpendicular to the side face; Among them, one of the first light source beam and the second light source beam is a laser beam, and the other is a wide-spectrum fluorescence; the coupling component includes an energy beam splitter and a reflector; the energy beam splitter has a first surface and a second surface opposite to each other; the energy beam splitter reflects a part of the incident light and transmits a part of it based on a set beam splitting ratio; the first surface is on the irradiation path of the first light source beam, so that a part of the first light source beam passes through the energy beam splitter and enters the converging component, and another part of the first light source beam passes through the energy beam splitter and the reflector in sequence and is reflected to the converging component; the second surface is on the irradiation path of the second light source beam, so that a part of the second light source beam passes through the energy beam splitter and is reflected to the converging component through the reflector, and another part of the second light source beam is reflected to the converging component through the energy beam splitter.

2. The light source device according to claim 1, characterized in that: The converging component is located between the coupling component and the light rod, and the converging component and the light rod have the same optical axis; The reflector and the energy beam splitter both have an angle of 45° with the optical axis, and are arranged opposite to each other in a direction perpendicular to the optical axis, and the reflective surface and the second surface of the reflector both face the converging component; The light emitting direction of the first light source assembly is toward the first surface and parallel to the optical axis, and the light emitting direction of the second light source assembly is toward the second surface and perpendicular to the optical axis.

3. The light source device according to claim 2, characterized in that: The first light source light beam emitted by the first light source assembly completely illuminates the first surface, and the second light source light beam emitted by the second light source assembly completely illuminates the second surface.

4. The light source device according to claim 2, characterized in that: The first light source light beam emitted by the first light source assembly completely irradiates the first surface; A portion of the second light source light beam emitted by the second light source assembly irradiates the second surface, and another portion directly irradiates the reflector; Wherein, the first light source beam is a laser beam.

5. The light source device according to claim 1, characterized in that: The energy beam splitter includes: a transparent substrate and a beam splitting film arranged on the surface of the transparent substrate, the beam splitting film has a beam splitting ratio of X:Y, and is used to allow X% of the incident light to pass through and Y% of the incident light to be reflected, X+Y=100.

6. The light source device according to claim 1, characterized in that: The second light source assembly includes: a set laser light source for emitting laser light of a preset color; and a fluorescent element for emitting fluorescent light based on the laser light of the preset color.

7. The light source device according to claim 6, characterized in that: The fluorescent element is a ceramic fluorescent material, a crystal fluorescent material, or a fluorescent body of inorganic glue mixed with fluorescent powder.

8. The light source device according to claim 1, characterized in that: The first light source beam is a laser beam, including one or more of a red laser, a green laser and a blue laser; The second light source beam is a broad spectrum fluorescent light including at least part of visible light; The first light source beam and the second light source beam have an overlapping wavelength band, and a spectral width of a continuous spectrum in the first light source beam including the overlapping wavelength band is smaller than a spectral width of a continuous spectrum in the second light source beam including the overlapping wavelength band.

9. A display device, characterized in that: The display device comprises the light source apparatus according to any one of claims 1-8.

10. A lighting device, characterized in that: The lighting device comprises the light source device according to any one of claims 1-8.

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