TW201807479A - A light source device and display system - Google Patents

Abstract

The present invention provides a light source and projector, which comprising a light-emitting device, a light-splitting device, a wavelength conversion device, a relay device, a light-combining device, and monochromatic light emitted from the light-emitting device are sequentially divided into a first light emitted from the first optical channel at time or at the same time And a second light emitted along the second optical path, the first light entering the first light path is irradiated on the wavelength converting means to generate a third light; a second light is incident on the relay means, the second light and the third light and is finally introduced into the light receiving apparatus through the light combining means, and the projection image is distributed to the projector having the SLM to generate a projection image. The light source of the invention converts monochromatic light into trichromatic light, which provides the light source required by the projector, reduces the loss of light energy when the white light is divided into three primary colors during the traditional scheme, simplifies the structure of the light source and improves the light effect.

Description

Light source device and display system

The invention relates to a light source device and a display system.

At present, laser light source devices are increasingly used in display (such as projection) and lighting fields. Due to the advantages of high energy density and small optical expansion, laser light source devices have gradually been replaced in the field of high-brightness light source devices. Light bulb and LED light source unit. Among them, a blue light laser is used as an excitation light source device to excite yellow fluorescent powder to generate white light, which has become a mainstream application due to its advantages such as high light efficiency, good stability, and low cost.

However, under high-energy-density blue-light laser excitation conditions, generally yellow phosphors need to be made in the form of a rotating color wheel to solve the problem of scattering. As an option, a reflective color wheel is generally selected, which has a high energy density and The advantage of light spot dispersion is small. In the configuration of the white light source device, two forms of blue light and yellow light are generally adopted, that is, the light source device has two independent light paths and finally combines light, which makes the system complicated and costly. In addition, a simpler blue light + yellow light solution can also be adopted, that is, the blue light is divided into two channels according to a certain ratio, one channel is still used as blue light, and the other channel is excited to generate yellow light with yellow light and then combined with blue light to form white light. In principle, it is a relatively simple and practical solution, but according to the actual situation, after the blue light excites the yellow phosphor, a considerable part of the blue light is not absorbed, and this part of the blue light is basically lost during the final light emission process. As a result, the light effect of the system is adversely affected. At the same time, in the whole machine, because the blue light spectrum is narrow, after the coating of the entire system, the proportion of blue light in different areas will be different, which will affect the uniformity of the picture. In addition, the above-mentioned architecture is used to combine light However, the light source device that emits non-white light (such as orange, blue, and other colors of light) also has the problems of a complicated structure and poor uniformity of the light output color. Based on the above, there is an urgent need for a light source device that has a relatively simple structure or solves the problem of uniformity of light emission to some extent.

In order to solve the technical problems of the complicated structure of the light source device in the prior art or the poor uniformity of the light emission color, it is necessary to provide a light source device with a simpler structure or more uniform light emission color.

It is also necessary to provide a display system using the light source device.

A light source device includes an excitation light source device, a scattering device, a wavelength conversion device, and an area light splitting device. The area light splitting device includes at least two first areas and includes a second area. For emitting excitation light, the at least two first regions are configured to receive a first portion of the excitation light and guide the received first portion of the excitation light to the scattering device, and the second region is used for Receiving the second part of the excitation light and guiding the second part of the excitation light to the wavelength conversion device; the scattering device is configured to scatter the first part of the excitation light, and The first part of the excitation light is provided to the area spectroscopic device, and the second area is further used to guide the scattered first part of the excitation light to the light exit channel of the light source device; the wavelength conversion device is used to direct the first The two parts of the excitation light are converted into a laser beam, and the laser beam is provided to the area beam splitting device. The at least two first regions and the second region. Further means for receiving the laser light guided to the path.

In one embodiment, the excitation light source device includes an excitation light array, and the excitation light source device emits at least two excitation light beams; the first region is set corresponding to one excitation light beam, and the corresponding excitation light beam is set Partially or fully reflected to the scattering device.

In one embodiment, the light intensity of the excitation beam is weakened from the center of the beam toward the periphery; the center position of the first region corresponds to the center of the corresponding excitation beam. By matching the center position of the first region with the center of the corresponding excitation beam, the highest light intensity portion of the excitation beam can be reflected by the first region, so that the area of the first region can be set Make it smaller, which can further reduce the uneven color of the light.

In an embodiment, an area of the first region is smaller than a spot area of a corresponding excitation light beam formed on the region beam splitting device. Because the area of the first region is smaller than the spot area formed by the corresponding excitation beam on the region beam splitting device, the first region can fully reflect the highest light intensity portion of the laser beam, and the first The utilization ratio of a region is high, and there are no regions such as corners that do not play the role of reflection. Furthermore, the area of the first region can also be set to be smaller to further reduce the uneven color of light.

In one embodiment, the number of the first regions is equal to the number of excitation beams emitted by the excitation light source device. In this embodiment, a high-intensity portion of each excitation beam has a first region to guide (reflect or transmit) it. Compared with a scheme in which some excitation beams do not have corresponding first regions to guide their high-intensity portion, all first When the ratio of the excitation light guided by the region to the excitation light emitted by the excitation light source device is fixed, the total area of the first region can be reduced, thereby reducing the non-uniformity of the light color. Because if the number of first regions is smaller than the number of excitation beams emitted by the excitation light source device, relative to the case where the number of first regions is equal to the number of excitation beams emitted by the excitation light source device, in order to make all the first regions The proportion of the excitation light guided by a region to the excitation light emitted by the excitation light source device reaches a predetermined ratio, and the area of the first region needs to be expanded. As the intensity of the beam decreases toward the periphery of the beam, the area to be expanded in the first region is increased. The larger the size, the larger the total area of the first region, and the uneven color of the light. In this embodiment, setting the number of the first regions to be equal to the number of the excitation beams emitted by the excitation light source device can greatly improve the uniformity of the light color.

In one embodiment, each of the first regions has an equal area. In this embodiment, on the basis that the number of the first regions is equal to the number of excitation beams emitted by the excitation light source device and the center positions thereof correspond to each other, each of the first regions has an equal area. A scheme in which the area of each of the first regions is not equal on the basis that the number of regions is equal to the number of excitation beams emitted by the excitation light source device and the center position corresponds to ensure that the excitation light sources guided by all the first regions occupy the excitation light source When the ratio of the excitation light emitted by the device is fixed, each of the first regions in this embodiment has an equal area, so that the total area of all the first regions can be minimized, thereby reducing unevenness of light color. Because, under the condition that the proportion of the excitation light emitted by the excitation light source device occupied by the excitation light guided by all the first regions is fixed, if the areas of the first regions are not equal, for example, the area of one first region is small, then at least another The area of a first area needs to be large to ensure that the proportion of excitation light emitted by the excitation light source device is constant for all the excitation light guided by the first area. If the area of the first area is reduced by 10%, The intensity of the light beam gradually decreases from the center to the periphery. The area of the at least one additional area of the first area must be increased by more than 10% (the area may be increased by 20%) to ensure that the excitation light guided by all the first areas The proportion of the excitation light emitted by the occupied excitation light source device is fixed, so that the total area of all the first regions is increased compared to the total area of the first regions, which is not conducive to ensuring the uniformity of the light color. Therefore, in this embodiment, each of the first regions has an equal area. Not only can multiple excitation beams be guided (transmitted or reflected) to the same degree, but also the total area of all the first regions can be minimized, so light is emitted. Better color uniformity.

In one embodiment, the total light intensity of the first portion of the excitation light is a predetermined value, and the area of the first region is greater than or equal to a threshold small threshold, and the excitation light that can be guided by the first region whose area is the threshold small threshold The intensity of is the limit small intensity; when the predetermined value is greater than or equal to the product of the number of the excitation beams and the limit small intensity, the number of the first regions is equal to the number of the excitation beams; otherwise, the first The number of one region is equal to a value obtained by rounding up the predetermined value and the limit small intensity. In this embodiment, when the area of the first region is set to the limit small threshold, the area of the first region is the smallest under the condition that the required total light intensity is kept constant. The problem of uneven light color caused by the larger area of a region is greatly improved.

In one embodiment, when the number of the first regions is less than the number of the excitation beams, the first regions are uniformly dispersed and disposed in the region light splitting device. When the first area is uniformly distributed in the area light splitting device, the light uniformity of the area light splitting device is better.

In one embodiment, the first region reflects the excitation light emitted by the excitation light source device and the laser beam received by the wavelength conversion device, and the second region transmits the excitation light emitted by the excitation light source device and reflects the light. The wavelength conversion device emits a laser beam. In this embodiment, the excitation light and laser light are mainly reflected in the first area, and the excitation light is transmitted in the second area and the laser light is reflected and guided to guide the light.

In one embodiment, the first area transmits the excitation light emitted by the excitation light source device and transmits the received laser light emitted by the wavelength conversion device, and the second area reflects and transmits the excitation light emitted by the excitation light source device. The wavelength conversion device receives laser light. In this embodiment, excitation light and laser light are mainly transmitted through the first area, and excitation light is reflected and transmitted by the second area to guide the light.

In one embodiment, the number of the second regions is one, the at least two first regions are arranged side by side, and the second region is disposed around the at least two first regions and the at least two The first area is surrounded. The at least two first regions mainly emitting laser light are surrounded by the second region emitting mixed excitation light and laser light, which has better light uniformity than a light source device in which the first region is set at a position such as an edge.

In one embodiment, the excitation light is blue excitation light, the wavelength conversion device includes a yellow fluorescent material, the laser receiving is yellow receiving laser, and the light source device can emit white light.

A display system includes a light source device. The light source device includes an excitation light source device, a scattering device, a wavelength conversion device, and an area light splitting device. The area light splitting device includes at least two first areas and includes a second area. The excitation light source device is configured to emit excitation light, and the at least two first regions are configured to receive a first portion of the excitation light and guide the received first portion of the excitation light to the scattering device. The second region is configured to receive a second portion of the excitation light and guide the second portion of the excitation light to the wavelength conversion device; and the scattering device is configured to scatter the first portion of the excitation light. And providing the scattered first part of the excitation light to the area beam splitting device, and the second area is further used to guide the scattered first part of the excitation light to the light exit channel of the light source device; the wavelength conversion device is used for For converting the second part of the excitation light into a laser beam and providing the laser beam to the area beam splitting device, the at least two first Domain of the second region further for receiving the laser light guided to the path.

In one embodiment, the excitation light source device includes an excitation light array, and the excitation light source device emits at least two excitation light beams; the first region is set corresponding to one excitation light beam, and the corresponding excitation light beam is set Partially or fully guided to the scattering device.

In one embodiment, the light intensity of the excitation beam is weakened from the center of the beam toward the periphery; the center position of the first region corresponds to the center of the corresponding excitation beam. By matching the center position of the first region with the center of the corresponding excitation beam, the highest light intensity portion of the excitation beam can be reflected by the first region, so that the area of the first region can be set Make it smaller, which can further reduce the uneven color of the light.

Compared with the prior art, in the light source device, the region light splitting device includes at least two first regions, and the at least two first regions emit laser light toward the light exit channel, but the areas of the two first regions It can be designed to be small, and the positions can also be designed to be relatively dispersed, so that the light emitted by the area beam splitting device will not have a significant area affected by the laser color as a whole, thereby reducing the unevenness of light output from the region beam splitting device, and effectively The uniformity of the color of the light emitted from the light source device is improved, and the uniformity of the color of the light from the light source device is better.

In order to make the foregoing objects, features, and advantages of the present invention more comprehensible, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

In the following description, many specific details are set forth in order to fully understand the present invention, but the present invention can also be implemented in other ways than those described herein, and those skilled in the art can do this without violating the meaning of the present invention. Similar applications, so the present invention is not limited by the specific embodiments disclosed below. The following describes it in detail through examples.

Please refer to FIG. 1, which is a schematic structural diagram of a light source device according to a first embodiment of the present invention. As shown in the figure, the light source device 300 includes an excitation light source device 301, a compression lens module 311, a diffusion sheet 304, a diffusion device 307, a first collecting lens 306, an area beam splitting device 305, a wavelength conversion device 309, and a second collecting lens. 308, and uniform light device 310.

The excitation light source device 301 is configured to emit excitation light. The excitation light source device 301 may be a semiconductor diode or a semiconductor diode array. The semiconductor diode array may be a laser diode (LD) or a light emitting diode (LED). The excitation light may be blue light, purple light, or ultraviolet light, but is not limited to the above. The excitation light source device 301 can emit at least two beams of excitation light in parallel. Specifically, the excitation light source device 301 may include a plurality of (eg, 16) laser diodes arranged side by side and arranged in a matrix (4 * 4 square matrix), so that the excitation light source device 301 emits multiple beams of parallel excitation light. . In this embodiment, the excitation light source device 301 is a blue light semiconductor diode array, and is configured to emit a plurality of blue excitation lights.

The compression lens module 311 is configured to compress the excitation light emitted from the excitation light source device 301 and includes a positive lens 302 and a negative lens 303. The positive lens 302 and the negative lens 303 are sequentially disposed on the optical path of the excitation light emitted by the excitation light source device 301. The positive lens 302 is disposed adjacent to the excitation light source device 301, and the positive lens 302 may be a convex lens for collecting the excitation light emitted by the excitation light source device 301. The negative lens 303 is disposed on the optical path of the excitation light collected through the positive lens 302. The negative lens 303 may be a concave lens for converting the excitation light collected through the positive lens 302 into parallel-excited excitation light. . In this embodiment, after the excitation light emitted from the excitation light source device 301 (such as a semiconductor diode array) passes through the compression lens module 311, the light spot area becomes smaller, so that the compression lens module 311 achieves the Compression of the excitation light emitted from the excitation light source device 301. It can be understood that, in the modified embodiment, according to the type / structure of the excitation light source device and the actual demand for the light source device, the light source device 300 may also omit the compression lens module 311.

The diffusing sheet 304 is disposed adjacent to the compression lens module 311 and is configured to diffuse and uniformize the excitation light compressed by the compression lens module 311. Specifically, the diffusion sheet 304 is disposed on the optical path of the excitation light emitted from the compression lens module 311, and is disposed adjacent to the negative lens 303. It can be understood that, in the modified embodiment, according to the type / structure of the excitation light source device and the actual demand for the light source device, the light source device 300 may also omit the diffusion sheet 304.

The area splitting device 305 is located on the optical path of the excitation light emitted by the excitation light source device 301 and includes a first area 3051 and a second area 3052. The first region 3051 is configured to receive a first portion of the excitation light from the excitation light through the compression lens module 311 and the diffusion sheet 304 and reflect the received first portion of the excitation light to the scattering device. 307. The second region 3052 is configured to receive a second portion of the excitation light (that is, a portion of the excitation light excluding the first portion of the excitation light) and transmit the second portion of the excitation light to provide The wavelength conversion device 309.

The scattering device 307 is configured to scatter and reflect the first part of the excitation light reflected in the first area 3051, so as to provide the scattered first part of the excitation light to the second area 3052; those skilled in the art may It is understood that the scattering device 307 may provide the first portion of the excitation light that has been at least partially scattered to the second region 3052. The second region 3052 is further configured to receive the first part of the excitation light scattered after being scattered by the scattering device 307 and transmit the light of the first part of the scattered excitation light to the light source device 300 after transmitting. On channel 312.

The first collecting lens 306 is located on an optical path between the scattering device 307 and the area beam splitting device 305, and is configured to collimate a first part of the excitation light on the optical path. It can be understood that the first collection lens 306 may be a convex lens. In a modified embodiment, according to the type / structure of the excitation light source device and the actual demand for the light source device, the light source device 300 may also omit the first collection lens 306.

The wavelength conversion device 309 is disposed on the optical path of the excitation light emitted from the second region 3052 of the region light splitting device 305, and includes a fluorescent material for converting a second portion of the excitation light transmitted through the second region 3052. To receive laser light, the laser light is provided to at least one of the two first areas 3051 and the second areas 3052. As can be understood by those skilled in the art, the wavelength conversion device 309 may provide at least a part of The received laser is provided to the area beam splitting device 305. At least one of the first region 3051 and the second region 3052 is further configured to reflect the laser beam to the light exit channel 312, and the laser beam is combined with the scattered first portion of the excitation light into white light. In this embodiment, the laser beam is provided to the first region 3051 and the second region 3052, and the first region 3051 and the second region 3052 collectively reflect the laser beam to the light exit channel. 312.

The second collection lens 308 is disposed between the wavelength conversion device 309 and the area beam splitting device 305, and the second collection lens 308 is used to connect the area beam splitter 305 and the wavelength conversion device 309. The excitation light in the optical path is collimated with the laser beam. It can be understood that, in the modified embodiment, according to the type / structure of the excitation light source device and the actual demand for the light source device, the light source device 300 may also omit the second collection lens 308.

In this embodiment, the excitation light source device 301 emits a plurality of parallel excitation lights. It can be understood that the plurality of excitation lights are divided into the first part of the excitation light and the second part of the excitation light. Specifically, a first part of the excitation light in the plurality of parallel excitation lights is reflected to the scattering device 307 by the two first regions 3051, and a second part of the excitation light in the plurality of excitation lights is detected by the The second region 3052 is transmitted to the wavelength conversion device 309. Specifically, the first part of the excitation light includes two beams of the first excitation light. The second portion of the excitation light may include the remaining multiple beams of excitation light.

The multiple beams of side-by-side excitation light emitted by the excitation light source device 301 can form multiple light spots on the area light splitting device 305 (or other optical elements, such as the diffusion sheet 304). It can be understood that since the compression lens In the module 311, the areas of the multiple light spots formed by the multiple beams of excitation light in the region of the area beam splitting device 305 are smaller than the area of the light spots formed by the uncompressed lens module 311. It can be understood that the excitation light is blue excitation light. Please refer to FIG. 2, which is a schematic diagram of a light spot formed by the excitation light source device of the light source device shown in FIG. 1. In this embodiment, since the excitation light source device 301 includes 16 laser diodes arranged in a square matrix of 4 * 4, the excitation light source device 301 emits 16 beams of excitation light and splits the light in the region. The device 305 is formed by 16 light spots, which are arranged in a square matrix of 4 * 4. It can be seen from FIG. 2 that the light spot formed by each excitation light includes a high-intensity light portion located at the center of the light beam and a medium-low intensity light portion located around the high-intensity light. Specifically, the light intensity of the light spot formed by each excitation light is from the center Gradually weaken towards the periphery.

In this embodiment, the first part of the excitation light includes two beams of excitation light (also referred to as two beams of first excitation light). The second portion of the excitation light may include the remaining multiple (eg, 14) excitation lights (also referred to as multiple second excitation lights).

Please refer to FIG. 3, which is a schematic plan view of a region light splitting device of the light source device shown in FIG. 1. In this embodiment, the region light splitting device 305 includes two first regions 3051 arranged in parallel and a second region 3052 arranged around the two first regions 3051. The first region 3051 is disposed corresponding to one excitation beam, and partially or completely reflects the corresponding excitation beam. In this embodiment, the two first regions 3051 are configured to reflect the first part of the excitation light, and the areas of the two first regions 3051 may be equal. Specifically, each of the first regions 3051 reflects a corresponding first excitation light to the scattering device 307. The area of the light spot formed by the first beam of excitation light on the region light splitting device 305 may be slightly smaller than the area of each of the first regions 3051, so that the first beam of excitation light can be correspondingly processed. The first region 3051 is substantially totally reflected to the scattering device 307. Preferably, the reflectivity of the first region 3051 to the corresponding first excitation light is higher than 90% (for example, more than 99%). The second region 3052 is configured to transmit the second part of the excitation light (that is, a plurality of second excitation lights) to the wavelength conversion device 309, and transmit the scattered first part of the excitation light provided by the scattering device 307. To the light emitting channel 312, and reflecting the laser beam provided by the wavelength conversion device 309 to the light emitting channel 312.

The first region 3051 may be rectangular but not limited to a rectangle, the second region 3052 is a rectangle with two openings, and the two first regions 3051 are respectively located in two openings of the second region 3052. Therefore, the first region 3051 and the second region 3052 are just spliced into an integrated rectangle. Specifically, the first region 3051 may be located at a central position of the second region 3052, and an area of each of the first regions 3051 may be smaller than an area of the second region 3052.

In this embodiment, the number (two) of the first regions 3051 is smaller than the number of the excitation light beams (16 beams), and the first regions 3051 are uniformly dispersed in the region beam splitting device 305. Specifically, the two first regions 3051 respectively correspond to a beam of excitation light in a second row and a second column and a beam of excitation light in a third row and a third column of the 16 beams of excitation light arranged in a square array. That is, one excitation light in the second row and the second column and one excitation light in the third row and the third column are the two first excitation lights (ie, the first partial excitation light). The remaining multiple excitation lights among the excitation lights arranged in the 16 square arrays are the 14 second excitation lights (that is, the second partial excitation lights), and all of them are incident on the second area 3052 and affected by the The second region 3052 is transmitted to the wavelength conversion device 309 for conversion to the laser beam.

Of course, it can be understood that the shapes, numbers, or areas of the first area 3051 and the second area 3052 may not be limited to the shapes, numbers, or areas in this embodiment, that is, the first area 3051 and the area The shape, number, or area of the second region 3052 can be adjusted according to actual needs.

Specifically, the region light splitting device 305 may be a film, and the first region 3051 and the second region 3052 may be an integrated film. Of course, it can be understood that the region light splitting device 305 may also be a film group, and the first region 3051 and the second region 3052 may be at least two films that are independent of each other but stacked together. The area splitting device 305 is disposed at an angle of 45 degrees with respect to the light emitting surface of the excitation light source device 301, the light emitting surface of the scattering device 307, and the light emitting surface of the wavelength conversion device 309.

Specifically, in this embodiment, when the excitation light is blue excitation light, the first region 3051 is a reflection region where both blue light and yellow light are reflected, and the second region 3052 is blue light transmitted and yellow In a region where light is reflected, the wavelength conversion device 309 includes a yellow fluorescent material, the laser receiving is a yellow receiving laser, and the supplementary light is a blue supplementary light. The laser light and the first part of the excitation light are combined into white light.

The light homogenizing device 310 is provided corresponding to the light exit channel 312 and is used to uniformize the light emitted by the area light splitting device 305. It can be understood that the light exit channel 312 may be a space defined on the light path of the area light splitting device 305 and is located between the area light splitting device 305 and the light homogenizing device 310.

In the following, the specific light path principle when the light source device 300 works is briefly introduced.

When the light source device 300 is operating, the excitation light source device 301 emits multiple blue excitation lights, and the multiple blue excitation lights are sequentially compressed and scattered through the compression lens module 311 and the diffusion sheet 304. And is then provided to the area beam splitting device 305, wherein the two blue first excitation lights are provided to the two first areas 3051, respectively, and the remaining multiple blue second excitation lights are provided to the Mentioned second area 3052.

The two first regions 3051 reflect the two blue first excitation lights received and provide the two blue first excitation lights after reflection to the scattering through the first collection lens 306 Device 307. After the scattering device 307 scatters the two blue first excitation lights, the scattered two blue first excitation lights are provided to the second area 3052 through the first collection lens 306 The second region 3052 transmits the two blue first excitation lights to the light exit channel 312.

The second region 3052 transmits the remaining plurality of blue second excitation light beams received and provides the second excitation lens 308 to the wavelength conversion device 309, and the wavelength conversion device 309 receives the Multiple beams of blue second excitation light, and the multiple beams of blue second excitation light excite the yellow fluorescent material to generate yellow laser beams and emit them. The yellow receiving laser is provided to the first region 3051 and the second region 3052 of the region light splitting device 305 through the second collecting lens 308, and the first region 3051 and the second region 3052 are paired with the yellow region. It is reflected by the laser and is provided to the light exit channel 312 of the light source device 300.

Specifically, the two first regions 3051 can emit yellow and laser beams, and the second region 3052 can emit yellow and blue beams of first excitation light, that is, the yellow beams are excited by laser and blue beams. The light is combined in the area beam splitting device 305 to generate white light to enter the light exiting channel 312 and the light uniformizing device 310. Specifically, please refer to FIG. 4. FIG. 4 is a schematic diagram of a far-field distribution of light emitted from the area beam splitting device shown in FIG. 2 to the light exit channel. The two first areas 3051 mainly emit yellow light (Y), and the second area 3052 emits yellow light (B + Y) combined with yellow light (Y) and blue first excitation light (B). ).

Since the two first regions 3051 are provided in the present invention, the two first regions 3051 mainly emit yellow and receive laser, but the area of the two first regions 3051 can be designed to be smaller and the position can also be designed For relative dispersion, the light emitted by the area beam splitting device 305 will not have a significant area affected by the laser color as a whole, thereby reducing the unevenness of light output from the area beam splitting device 305.

Please refer to FIG. 5 and FIG. 6, FIG. 5 is a schematic structural diagram of a light source device according to a second embodiment of the present invention, and FIG. 6 is a schematic plan structural diagram of a region light splitting device of the light source device shown in FIG. 5. The light source device 400 of the second embodiment is basically the same as the light source device 300 of the first embodiment in structure, that is, the above description of the light source device 300 of the first embodiment can be used for the second embodiment. Light source device 400, but the main difference between the two is that the first area 4051 and the second area 4052 of the area spectroscopic device 405 of the second embodiment are different in number and position from the first area of the area spectroscopic device 305 of the first embodiment. A region 3051 and a second region 3052 are different, so that the composition of the first portion of the excitation light incident on the first region 4051 and the second portion of the excitation light incident on the second region 4052 by the self-excitation light source device 401 is also the same as The first part of the excitation light and the second part of the excitation light in the first embodiment are different.

Specifically, in the second embodiment, the region light splitting device 405 includes a plurality of first regions 4051 and a second region 4052 located around the first region 4051. Preferably, the number of the plurality of first regions 4051 may correspond to the number of the plurality of excitation light beams emitted by the excitation light source device 401, and the areas of the plurality of first regions 4051 may be equal.

As shown in FIG. 5 and FIG. 6, the light intensity of each excitation light gradually decreases from the center to the periphery. In this embodiment, a center position of the first region 4051 corresponds to a center of a corresponding excitation beam, and an area of the first region 4051 is smaller than a spot formed by the corresponding excitation beam on the region beam splitting device 405 area. The light spot formed by each excitation light includes a high-intensity light portion located at the center of the light beam and a low-intensity light portion located around the high-intensity light portion. Each of the first regions 4051 is configured to reflect the high-intensity light portion of a received excitation light to The scattering device 407 and the second region 4052 are configured to transmit a portion of low-intensity light received in each excitation light to the wavelength conversion device 409.

Further, it can be understood that, preferably, as shown in FIG. 5, when the excitation light source device 401 emits 16 beams of excitation light, as shown in FIG. 6, the area light splitting device 405 may be provided with The 16 first regions 4051 corresponding to the high-intensity light portion may be arranged in a 4 * 4 square matrix.

In addition, it should be noted that, in a modified embodiment of the second embodiment, when the area of the first region 4051 is smaller than the spot area of the corresponding excitation beam formed on the region beam splitting device 405, Actually, the number of the first regions 4051 may be smaller than the number of the excitation beams. Specifically, the required total light intensity of the first part of the excitation light is set to a predetermined value, and the area of the first region 4051 has a limit threshold value from a technical point of view. The smallest area that can be manufactured by the process, and the intensity of the excitation light that can be guided by the first region 4051 with the area of the limit small threshold value can be set as the limit small intensity; it can be understood that when the predetermined value is greater than or equal to that of the excitation beam When the product of the number and the limit small intensity is obtained, the number of the first region 4051 is equal to the number of the excitation beams; otherwise, the number of the first region 4051 is equal to an increase of the predetermined value and the limit small intensity. Rounded value.

Since the area beam splitting device 405 of the light source device 400 is provided with the plurality of first areas 4051 corresponding to the number of beams of the excitation light, the first area 4051 mainly emits yellow and is subjected to laser, but the plurality of first The area of a region 4051 can be designed to be small, and the positions can also be designed to be relatively dispersed, so that the light emitted by the region beam splitting device 405 will not have a region affected by the laser color as a whole, and the high-intensity portion of multiple beams of excitation light Both are reflected by the first region 4051 and scattered by the scattering device 407, which can also effectively reduce uneven light output. Therefore, the uniformity of light output color of the light source device 400 is better.

Because the area of the first region 4051 is smaller than the spot area formed by the corresponding excitation beam on the region beam splitting device 405, the first region 4051 can fully reflect the highest light intensity portion of the laser beam, and The utilization rate of the first region 4051 is high, and there are no regions such as corners that have no reflection effect. Furthermore, the area of the first region 4051 can be set to be smaller, and the uneven color of the light can be further reduced.

When the number of the first regions 4051 is equal to the number of the excitation beams emitted by the excitation light source device 401, a high-intensity portion of each excitation beam has a first region 4051 to guide (reflect or transmit) it. Some excitation beams do not have a solution for guiding the high light intensity portion of the first region 4051. In the case where the ratio of the excitation light guided by the first region 4051 to the excitation light emitted by the excitation light source device 401 is fixed, the first region can be reduced The total area of 4051, thereby reducing the color unevenness of the light. Because if the number of the first regions 4051 is smaller than the number of the excitation beams emitted by the excitation light source device 401, relative to the case where the number of the first regions 4051 is equal to the number of the excitation beams emitted by the excitation light source device 401, In order to make the ratio of the excitation light guided by all the first regions 4051 to the excitation light emitted by the excitation light source device 401 reach a predetermined ratio, the area of the first region 4051 needs to be expanded, and the beam intensity decreases toward the periphery of the beam. The larger the area to be expanded by the region 4051 is, the larger the total area of the first region 4051 is, and the unevenness of the light color is increased. In this embodiment, setting the number of the first regions 4051 to be equal to the number of the excitation beams emitted by the excitation light source device 401 can greatly improve the uniformity of the light color.

In this embodiment, on the basis that the number of the first regions 4051 is equal to the number of the excitation beams emitted by the excitation light source device 401 and corresponding to the center position, each of the first regions 4051 has an equal area. On the basis that the number of the first regions 4051 is equal to the number of the excitation light beams emitted by the excitation light source device 401 and the center positions thereof are corresponding, the solutions of the first regions 4051 having unequal areas are guided by all the first regions 4051. When the proportion of the excitation light emitted by the excitation light source 401 is constant, each of the first regions 4051 in this embodiment has an equal area, so that the total area of all the first regions 4051 can be minimized, thereby reducing Uneven light color. Because, in the case where the proportion of the excitation light emitted by the excitation light source device 401 occupied by the excitation light guided by all the first regions 4051 is fixed, if the areas of the first regions 4051 are not equal, for example, the area of one first region 4051 is smaller , Then the area of at least one other first region 4051 needs to be large to ensure that the excitation light guided by all the first regions 4051 occupies a fixed proportion of the excitation light emitted by the excitation light source device 401, and if the area of the one first region decreases 10% smaller, because the intensity of the excitation beam gradually decreases from the center to the periphery, the area of the at least one additional area of the first area 4051 must be increased by more than 10% (may need to be increased by 20%) to guarantee all The excitation light guided by the first region 4051 occupies a fixed proportion of the excitation light emitted by the excitation light source device 401. In this way, the total area of all the first regions 4051 is larger than the total area of the first regions 4051 when they are equal, so that Not conducive to ensuring the uniformity of light color. Therefore, in this embodiment, each of the first regions 4051 has an equal area, which not only can guide (transmit or reflect) multiple excitation beams to the same degree, but also can ensure that the total area of all the first regions 4051 is the smallest. Therefore, the uniformity of the light color is better.

When the area of the first region 4051 is set to the limit small threshold, the area of the first region 4051 is the smallest under the condition that the required total light intensity is not changed. The problem of uneven light color caused by a larger area is greatly improved.

When the first area 4051 is uniformly distributed in the area light splitting device 405, the light uniformity of the area light splitting device 405 is better.

It can be understood that, in the first and second embodiments, the excitation light is reflected and received by the laser mainly through the first region, and the excitation light is transmitted and reflected by the second region to guide the light.

However, in the following modified embodiment (in the third and fourth embodiments), the excitation light and laser light are mainly transmitted through the first area, and the excitation light is reflected and transmitted by the second area to guide the light, which is described below. The third and fourth embodiments will be described in detail.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a light source device according to a third embodiment of the present invention. FIG. 8 is a schematic plan structural diagram of a region light splitting device of the light source device shown in FIG. 7. The light source device 500 of the third embodiment is basically the same as the light source device 300 of the first embodiment, that is, the above description of the light source device 300 of the first embodiment can basically be applied to the third embodiment. Light source device 500, but the main difference between the two is that the structure of the area light splitting device 505 is different from the structure of the area light splitting device 305 of the first embodiment, and the scattering device 507 and the wavelength conversion device 509 are compared with the first embodiment. The position of the scattering device 307 and the wavelength conversion device 309 are exchanged, so that the light path principle of the light source device 500 is also different from the light source device 300 of the first embodiment.

Specifically, as shown in FIG. 8, the first region 5051 of the region light splitting device 505 transmits the excitation light emitted by the excitation light source device 501 and transmits the received laser emitted by the wavelength conversion device 509, and the second region 5052 reflects the excitation light source device 501. The emitted excitation light is transmitted through the laser beam emitted from the wavelength conversion device 509. When the light source device 500 is in operation, the excitation light source device 501 emits multiple beams of excitation light, and the multiple beams of excitation light are sequentially compressed and scattered through the compression lens module 311 and the diffusion sheet 304 and are provided to In the area beam splitting device 505, two beams of excitation light are respectively provided to the two first regions 5051, and the remaining multiple beams of excitation light are provided to the second region 5052. Of course, it can be understood that, in a modified embodiment, the number of the first regions 5051 may be greater than two, such as 4, 8, 10, 14, and so on. The same number of first regions 5051 and several beams (4 beams, 8 beams, 10 beams, 14 beams, etc.) are provided to the plurality of first regions 5051, respectively.

Each of the first regions 5051 transmits the received excitation light and transmits the transmitted excitation light to the wavelength conversion device 509 via the second collection lens 508, and the wavelength conversion device 509 receives the The excitation light provided by the first region 5051, part of the excitation light excites the fluorescent material to be emitted by the laser and emitted, and the other part of the excitation light is not absorbed by the fluorescent material and is reflected by the wavelength conversion device 509 to the area spectrum. The device 505 is reflected by the second area 5052 to the light exit channel 312.

The laser beam is provided to the first region 5051 and the second region 5052 of the area beam splitting device 505 via the second collection lens 508, and the first region 5051 and the second region 5052 are to the laser beam received Reflect and provide the light exit channel 312 of the light source device 500.

The second region 5052 receives the excitation light from the excitation light source device 501 and reflects the excitation light to a scattering device 507. The scattering device 507 scatters the excitation light provided in the second region 5052, and then supplies the scattered excitation light to the second region 5052 through the first collection lens 506. The second region 5052 will The excitation light provided by the scattering device 507 is transmitted to the light exit channel 312. The received laser light provided by the wavelength conversion device 509, the other part of the excitation light that is not absorbed by the fluorescent material, and the excitation light provided by the scattering device 507 are all provided to the light exit channel 312 by the area spectroscopy device 505 Combined light into white light. It can be understood that the excitation light is preferably blue excitation light, and the laser receiving is yellow receiving laser. However, in the modified embodiment adopting the optical path architecture, the excitation light and the laser receiving light are not limited to the above, and the light output from the light output channel 312 may not be white light, but other colors of light such as green and red.

It can be seen that, in the third embodiment, since the two first regions 5051 are provided in the present invention, the two first regions 5051 are mainly emitted and subjected to laser, but the areas of the two first regions 5051 can be The design is small, and the positions can also be designed to be relatively dispersed, so that the light emitted by the area beam splitting device 505 will not have a significant area affected by the laser color as a whole, thereby reducing the unevenness of light output from the area beam splitting device 505.

Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of a light source device according to a fourth embodiment of the present invention. FIG. 10 is a schematic plan structural diagram of a region light splitting device of the light source device shown in FIG. 9. The light source device 600 of the fourth embodiment is basically the same as the light source device 400 of the second embodiment, that is, the above description of the light source device 400 of the second embodiment can basically be applied to the fourth embodiment. Light source device 600, but the main difference between the two is that the structure of the area light splitting device 605 is different from the structure of the area light splitting device 405 of the second embodiment, and the scattering device 607 and the wavelength conversion device 609 are compared with the second embodiment. The position of the scattering device 407 and the wavelength conversion device 409 are exchanged, so that the light path principle of the light source device 600 is also different from the light source device 400 of the second embodiment.

Specifically, as shown in FIG. 10, the first region 6051 of the region light splitting device 605 transmits the excitation light emitted by the excitation light source device 601 and transmits the received laser emitted by the wavelength conversion device 609, and the second region 6052 reflects the excitation light source device 601. The emitted excitation light is transmitted through the laser beam emitted from the wavelength conversion device 609.

When the light source device 600 is in operation, the excitation light source device 601 emits multiple beams of excitation light, and the multiple beams of excitation light are sequentially compressed and scattered through the compression lens module 311 and the diffusion sheet 304 and are provided to In the area beam splitting device 605, a high-intensity light portion of each excitation light is provided to the first area 6051, and the remaining low-intensity light portion is provided to the second area 6052.

Each of the first regions 6051 transmits the received excitation light and provides the transmitted excitation light to the wavelength conversion device 609 via the second collection lens 608, and the wavelength conversion device 609 receives the first area The excitation light provided by 6051, part of the excitation light excites the fluorescent material to be emitted by the laser and emitted, and the other part of the excitation light is not absorbed by the fluorescent material and is reflected by the wavelength conversion device 609 to the area spectroscopic device 605 and is The second region 6052 is reflected to the light exit channel 312.

The laser beam is provided to the first region 6051 and the second region 6052 of the area beam splitting device 605 through the second collection lens 608, and the first region 6051 and the second region 6052 are coupled to the laser beam. Reflect and provide the light exit channel 312 of the light source device 600.

The second region 6052 receives the excitation light from the excitation light source device 601 and reflects the excitation light to a scattering device 607. The scattering device 607 scatters the excitation light provided in the second region 6052, and then supplies the scattered excitation light to the second region 6052 through the first collection lens 606. The second region 6052 will The excitation light provided by the scattering device 607 is transmitted to the light exit channel 312. The received laser light provided by the wavelength conversion device 609, the other part of the excitation light that is not absorbed by the fluorescent material, and the excitation light provided by the scattering device 607 are all provided to the light exit channel 312 by the area spectroscopy device 605. Combined light into white light. It can be understood that the excitation light is preferably blue excitation light, and the laser receiving is yellow receiving laser. However, in the modified embodiment adopting the above-mentioned optical path structure, the excitation light and the received laser light are not limited to the above-mentioned colors, and the light output from the light output channel 312 may not be white light, but other colors of light such as green and red. .

It can be seen that, in the fourth embodiment, since the present invention provides the plurality of first regions 6051 corresponding to the one-to-one excitation beams, the plurality of first regions 6051 mainly emit laser light, but the The areas of the plurality of first regions 6051 can be designed to be smaller and their positions can also be designed to be relatively dispersed, so that the light emitted by the region beam splitting device 605 will not have a region affected by the laser color as a whole, thereby reducing the regions. The spectroscopic device 605 has uneven light output.

The present invention also provides a display system. The display system may be a projection system, such as an LCD, DLP, or LCOS projection system. The display system may include a light source device, a light modulation device, and a projection lens. The light source device 300, 400, 500, 600 of the embodiment or the light source device according to a modified embodiment of the light source device 300, 400, 500, or 600 mentioned above is modified. The light modulation device is configured to modulate an image according to the light emitted by the light source device and the input image data to output a modulated image light, and the projection lens is configured to display a projection image based on the modulated image light. . A display system using the light source device 300, 400, 500, 600 and the light source device according to a modified embodiment thereof has higher light utilization efficiency and better color uniformity of an image.

In addition, it can be understood that the light source devices 300, 400, 500, 600 and modified light source devices of the present invention can also be used in stage light systems, vehicle lighting systems, surgical lighting systems, and the like, and are not limited to the above-mentioned projection systems.

It must be emphasized that the structure of a light source device provided by the present invention has been described in detail above. Specific examples are used herein to explain the principles and implementation of the present invention. The description of the above embodiments is only to help understand the method of the present invention and its core ideas. It should be noted that, for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

<Invention>
300‧‧‧light source device
400‧‧‧light source device
500‧‧‧light source device
600‧‧‧light source device
301‧‧‧excitation light source device
401‧‧‧excitation light source device
501‧‧‧excitation light source device
601‧‧‧excitation light source device
302‧‧‧Positive lens
303‧‧‧Negative lens
304‧‧‧ diffuser
305‧‧‧area beam splitting device
405‧‧‧area beam splitter
505‧‧‧area beam splitting device
605‧‧‧area beam splitting device
306‧‧‧The first collection lens
506‧‧‧The first collection lens
606‧‧‧The first collection lens
307‧‧‧Scattering device
407‧‧‧Scattering device
507‧‧‧Scattering device
607‧‧‧ scattering device
308‧‧‧Second collection lens
508‧‧‧Second Collection Lens
608‧‧‧Second Collection Lens
309‧‧‧wavelength conversion device
409‧‧‧wavelength conversion device
509‧‧‧wavelength conversion device
609‧‧‧wavelength conversion device
310‧‧‧ Uniform light device
311‧‧‧Compression Lens Module
312‧‧‧light exit channel
3051‧‧‧First Zone
4051‧‧‧First Zone
5051‧‧‧First Zone
6051‧‧‧First Zone
3052‧‧‧Second Zone
4052‧‧‧Second Zone
5052‧‧‧Second Zone
6052‧‧‧Second Zone

FIG. 1 is a schematic structural diagram of a light source device according to a first embodiment of the present invention; FIG. 2 is a schematic diagram of a light spot formed by an excitation light source device of the light source device shown in FIG. 1; 4 is a schematic diagram of the far-field distribution of light emitted from the area beam splitting device shown in FIG. 2 to the light exit channel; FIG. 5 is a schematic structural diagram of a light source device according to a second embodiment of the present invention; 7 is a schematic structural diagram of a light source device according to a third embodiment of the present invention; FIG. 8 is a schematic planar structure diagram of a region light splitting device of the light source device shown in FIG. 7; FIG. 9 is a fourth embodiment of the present invention 10 is a schematic structural view of a planar light source device of the light source device shown in FIG. 9.

300‧‧‧light source device

301‧‧‧excitation light source device

302‧‧‧Positive lens

303‧‧‧Negative lens

304‧‧‧ diffuser

305‧‧‧area beam splitting device

306‧‧‧The first collection lens

307‧‧‧Scattering device

308‧‧‧Second collection lens

309‧‧‧wavelength conversion device

310‧‧‧ Uniform light device

311‧‧‧Compression Lens Module

312‧‧‧light exit channel

3051‧‧‧First Zone

3052‧‧‧Second Zone

Claims (13)

A light source device includes an excitation light source, a scattering device, a wavelength conversion device, and an area light splitting device. The area light splitting device includes at least two first areas and includes a second area. The excitation light source is used to emit excitation light. The at least two first regions are configured to receive a first portion of the excitation light and guide the received first portion of the excitation light to the scattering device, and the second region is configured to receive the excitation A second part of the excitation light and guides the second part of the excitation light to the wavelength conversion device, the scattering device is configured to scatter the first part of the excitation light and provide the scattered first part of the excitation light. To the area light splitting device, the second area is further configured to guide the scattered first part of the excitation light to the light exit channel of the light source device, and the wavelength conversion device is used to convert the second part of the excitation light into a light receiving device. Laser, and providing the received laser to the area beam splitting device, the at least two first regions and the second region are further used for transmitting the laser Guided to the light path. The light source device according to item 1 of the patent application scope, wherein the excitation light source includes an excitation light array, and the excitation light source emits at least two excitation light beams; the first region is arranged corresponding to one of the excitation light beams, and The corresponding excitation beam is partially or totally reflected to the scattering device. The light source device according to item 2 of the scope of patent application, wherein the light intensity of the excitation beam is weakened from the center of the beam to the periphery; the center position of the first region corresponds to the center of the corresponding excitation beam. The light source device according to item 3 of the scope of patent application, wherein the area of the first region is smaller than the spot area formed by the corresponding excitation light beam on the region beam splitting device. The light source device according to item 4 of the scope of the patent application, wherein the number of the first regions is equal to the number of excitation beams emitted by the excitation light source. The light source device according to item 5 of the scope of patent application, wherein each of the first regions has an equal area. The light source device according to item 4 of the scope of patent application, wherein the total light intensity of the first part of the excitation light is a predetermined value, the area of the first region is greater than or equal to a limit small threshold, and the area is The intensity of the excitation light that can be guided by a region is the limit small intensity; when the predetermined value is greater than or equal to the product of the number of the excitation beams and the limit small intensity, the number of the first regions is equal to the excitation beam Otherwise, the number of the first regions is equal to a value obtained by rounding up the predetermined value and the limit small intensity. The light source device according to item 7 of the scope of patent application, wherein when the number of the first regions is smaller than the number of the excitation light beams, the first regions are uniformly dispersed and disposed in the region beam splitting device. The light source device according to item 1 of the patent application scope, wherein the first region reflects the excitation light emitted by the excitation light source and the laser beam emitted by the wavelength conversion device, and the second region transmits the excitation light source and emits The excitation light is reflected by the laser beam emitted by the wavelength conversion device. The light source device according to item 1 of the patent application scope, wherein the first region transmits the excitation light emitted by the excitation light source and transmits the received laser light emitted by the wavelength conversion device, and the second region reflects the excitation light source The emitted excitation light is transmitted through the laser beam emitted from the wavelength conversion device. The light source device according to item 1 of the scope of patent application, wherein the number of the second region is one, the at least two first regions are arranged side by side, and the second region is provided in the at least two first regions. The area is surrounded by the at least two first areas. The light source device according to item 1 of the patent application scope, wherein the excitation light is blue excitation light, the wavelength conversion device includes a yellow fluorescent material, and the received laser is yellow received laser. A display system includes a light source device, wherein the light source device adopts the light source device according to any one of items 1 to 12 of the patent scope.