CN218332280U - Light source module and projection equipment - Google Patents

Abstract

The utility model provides a light source module and projection equipment, this light source module includes: the device comprises a first light source component, a time-sharing optical splitter and a fluorescent generator. The first light source assembly is used for providing first primary color light. The time-sharing optical splitter is used for transmitting the first primary light to the first light-emitting channel to be output as the illumination light beam in a first illumination period and transmitting the first primary light to the second light-emitting channel to be transmitted to the fluorescent generator in a second illumination period, wherein the first illumination period and the second illumination period are different periods. The fluorescent generator is used for generating second primary color light under the excitation of the first primary color light to serve as an illumination light beam to be output.

Description

Light source module and projection equipment

Technical Field

The disclosure relates to a light source module and a projection device.

Background

Most of the current projection display systems are implemented by combining light valves with three primary color illumination beams of red (R), green (G) and blue (B). For example, in a DLP (Digital Light Processor) or LCOS (Liquid Crystal on Silicon) projection display system with a single Light valve, a projection Light source is required to output RGB three-primary-color illumination beams in a time-sharing manner, and the illumination beams are irradiated to DMD (Digital micro mirror Devices) or LCOS panels, and then a color image is displayed on a screen through a projection lens.

SUMMERY OF THE UTILITY MODEL

In a first aspect, an embodiment of the present disclosure provides a light source module, including: the device comprises a first light source component, a time-sharing optical splitter and a fluorescent generator. The first light source component is used for providing first primary color light; the time-sharing optical splitter is used for transmitting the first primary light to a first light-emitting channel to be output as an illumination light beam in a first illumination period and transmitting the first primary light to a second light-emitting channel to be transmitted to a fluorescent generator in a second illumination period, wherein the first illumination period and the second illumination period are different periods; the fluorescent generator is used for generating second primary color light under the excitation of the first primary color light to be output as an illumination light beam.

In a second aspect, an embodiment of the present disclosure provides a projection apparatus, including: a light valve, a projection lens and the light source module provided by the first aspect. The first primary color light, the second primary color light and the third primary color light output by the light source module are irradiated on a screen through the light valve and the projection lens to display a color image.

The above description is only an outline of the technical solution provided by the present disclosure, and the embodiments of the present disclosure are described below in order to make the technical means of the present disclosure more clearly understood and to make the above and other features and effects of the present disclosure more clearly understandable.

Drawings

Fig. 1 is a schematic structural diagram of a projection apparatus in an embodiment of the present disclosure;

FIG. 2 is a first schematic view illustrating a structure of a light source module according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of light transmission when the dimming element is located at a first predetermined position according to the embodiment of the disclosure;

FIG. 4 is a schematic diagram of light transmission when the dimming element is at a second predetermined position according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a segment of a rotating dimmer wheel according to an embodiment of the present disclosure;

FIG. 6 is a second schematic structural diagram of a light source module according to an embodiment of the present disclosure;

FIG. 7 is a timing diagram illustrating a control of the light source module according to an embodiment of the present disclosure;

fig. 8 is a third schematic structural diagram of a light source module in an embodiment of the disclosure.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. It is noted that in the drawings, the sizes of elements may be exaggerated for clarity of illustration. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. The term "plurality" includes two or more. The terms "first," "second," "third," and the like are used merely as labels, and are not limiting as to the number and order of their objects. In the optical path shown in the drawing, the light flux indicated by the solid line is the first primary color light, the light flux indicated by the two-dot chain line is the second primary color light, and the light flux indicated by the broken line is the third primary color light.

The embodiment of the disclosure provides a light source module and a projection device, wherein the light source module can be applied to the projection device and used as a projection light source. As shown in fig. 1, the projection apparatus 1 includes: the display device comprises a light source module 10, a light valve 20 and a projection lens 30, wherein red, green and blue tricolor light output by the light source module 10 is processed by the light valve 20 and then is irradiated on a screen through the projection lens 30 to display a color image. For example, the light valve 20 may be an LCD (Liquid Crystal Display), a DMD or an LCOS light valve, which is not limited in this embodiment. For example, the projection apparatus 1 may be a projection apparatus based on a single light valve, or may also be a projection apparatus based on two light valves, which is not limited in this embodiment.

As shown in fig. 2, the light source module 10 provided in the embodiment of the present disclosure may include: the light source module comprises a first light source assembly 100, a time-sharing optical splitter 110, a fluorescent generator 120 and a second light source assembly 130. The time-sharing optical splitter 110 is configured to split the first primary color light provided by the first light source assembly 100 in a time-sharing manner, so that the first primary color light can be directly used as an illumination light beam to be output, and can also be used as pump light for exciting the second primary color light.

The first light source assembly 100 is configured to provide a first primary color light. In practice, the first primary color light may be a light source such as a laser or an LED. For example, the first light source assembly 100 may include a laser light source 101, such as a laser diode array or a single laser diode, etc. The first primary color light may be: one of red, green and blue lights.

In some examples, first light source assembly 100 provides both the first primary light for projection illumination and a pump light source for fluorescent generator 120. Taking the first light source assembly 100 as an example of the excitation light source of the second primary light, the first light source assembly 100 includes a laser light source 101 and is a blue laser light source, that is, the first primary light is a blue laser. With the development of the EEL (Edge Emitting Laser) technology, the high-power blue semiconductor Laser has high conversion efficiency and large-scale mass production, and the cost is usually low. A blue laser source is typically selected for this assembly.

Further, the first light source assembly 100 may further include: the first focusing lens 102 is disposed on an optical transmission path between the laser light source 101 and the time-sharing optical splitter 110, and is configured to converge the first primary color light output by the laser light source 101 to reduce a beam diameter of the first primary color light.

In some examples, the time-share optical splitter 110 may be disposed near the focal point of the first focusing lens 102. In this way, the light spot irradiated onto the time-sharing optical splitter 110 after being focused by the first focusing lens 102 is small, and the size of the time-sharing optical splitter 110 can be effectively reduced, so that the occupied space of the time-sharing optical splitter 110 is reduced, and the time-sharing optical splitter 110 and the light valve 20 can be conveniently controlled synchronously. In addition, the transition band of the first primary color light and the second primary color light shown by the light source module 10 can be reduced, so that the time for turning off the light source module 10 is shortened, and the projection efficiency is improved.

The time-sharing optical splitter 110 transmits the first primary color light to the first light exit channel in the first illumination period to be output as an illumination light beam in the first illumination period; the first primary light is transmitted to the second light exit channel for transmission to the fluorescent generator 120 for use as pump light of the fluorescent generator 120 during the second illumination period. That is, the time-sharing optical splitter 110 may be arranged to transmit the first primary color light provided by the same first light source assembly 100 to two different light-exiting channels in a time-sharing manner, so that the first primary color light is directly output as an illumination light beam or is used as a pumping light for exciting the second primary color light. Therefore, the laser utilization rate in the light source module 10 can be effectively improved, and the unit brightness cost is reduced while the performances of brightness, color gamut, color saturation, contrast and the like of a projection picture are ensured. Meanwhile, the problem that a red light source, a blue light source and a green light source are required to be adopted by a light source system in the related art is also avoided.

It should be noted that the first illumination period and the second illumination period are different periods, and are determined according to the ratio of the illumination time of the first primary color light and the illumination time of the second primary color light in each scanning period in which one frame of image is scanned. Thus, the time-sequential colorized display can be realized by synchronizing the control timing of the time-sequential optical splitter 110 and the driving timing of the corresponding light valve 20, such as a DMD or LCOS panel, etc., and time-sequentially outputting the first primary color light and the second primary color light to the light valve 20.

In some examples, the time-shared optical splitter 110 may include: an optical path selection element and a drive mechanism. The driving mechanism controls the movement of the light path selection element to enable the first primary color light to selectively penetrate through the light path selection element or be reflected by the light path selection element, so that the time-sharing light branching function is realized. There are various embodiments, and two embodiments are mainly described below, but it should be noted that other applicable embodiments may be adopted in other examples, and the present embodiment is not limited thereto.

First, the light path selecting element may be a dimming element 111, and the driving mechanism is connected to the dimming element 111 for driving the dimming element 111 to deflect. When the dimming element 111 is deflected to the first preset position, the first primary light incident from the first light source assembly 100 is reflected into the first light-emitting channel by the dimming element 111, and when the dimming element 111 is deflected to the second preset position, the first primary light incident from the first light source assembly 100 is transmitted from the dimming element 111 into the second light-emitting channel to be further transmitted to the fluorescent generator 120.

For example, the driving mechanism may be a mechanical driving mechanism such as a motor, an electrostatic driving mechanism, an electromagnetic driving mechanism, a piezoelectric driving mechanism, or a thermal driving mechanism, which is not limited in this embodiment. By controlling the driving mechanism, the deflection angle of the dimming element 111 can be controlled, so that the dimming element 111 is deflected alternately to the first preset position and the second preset position. The first preset position and the second preset position are predetermined according to the actual light path.

The material refractive index of the dimming element 111 is larger than that of air. For example, the material of the light modulating element 111 may be a material having a relatively high refractive index, such as lanthanide glass. The first primary color light provided by the first light source assembly 100 enters the dimming element 111 from the front surface of the dimming element 111 and then exits into the air from the rear surface of the dimming element 111. Wherein, the front surface and the rear surface are two opposite surfaces of the light adjusting element 111, and the rear surface is a surface facing away from the first light source assembly 100. Since the rear surface of the light adjusting element 111 belongs to an interface of light from the optically dense medium to the optically sparse medium, total reflection occurs when the incident angle α of the first primary color light at the rear surface of the light adjusting element 111 is greater than the critical angle θ of total reflection. The critical angle θ of total reflection can be calculated according to the refractive index of air and the refractive index of the material of the light modulation element 111. Thus, the first preset position is a position where the incident angle α of the first primary color light on the rear surface of the light modulating element 111 is greater than the critical angle θ of total reflection and less than 90 degrees, and the second preset position is a position where the incident angle α of the first primary color light on the rear surface of the light modulating element 111 is greater than or equal to 0 degree and less than the critical angle θ of total reflection.

As shown in fig. 3, when the dimming element 111 is located at the first predetermined position, since the incident angle α of the first primary color light is greater than the critical total reflection angle θ, the first primary color light is totally reflected on the rear surface of the dimming element 111, so that the transmission direction of the first primary color light is changed and transmitted to the first light-emitting channel. As shown in fig. 4, when the dimming element 111 is located at the second predetermined position, the total reflection condition is not satisfied, and the first primary color light can enter the second light-emitting channel through the dimming element 111.

When the dimming device is used, the first preset position and the second preset position can be set according to the actual trend of the optical path, the pumping light intensity required by the fluorescent generator 120, and the amplitude of the driving mechanism capable of driving the dimming element 111 to deflect. For example, in order to reduce the deflection amplitude of the dimming element 111 as much as possible, the first preset position and the second preset position may be set as close to the critical angle of total reflection θ as possible. For example, the critical angle for total reflection θ is 35 degrees, the first preset position may be a position such that the incident angle α is 40 degrees or 45 degrees, and the second preset position may be a position such that the incident angle α is 0 degrees, 5 degrees, 10 degrees or 20 degrees. The second preset position shown in fig. 4, that is, the position when the incident angle α is 0 degrees, is only illustrative and not limiting.

Further, in order to increase the utilization rate of the first primary color light, anti-Reflection (AR) films may be disposed on both the upper and lower surfaces of the light modulation element 111.

Second, the optical path selection element may be a rotating dimming wheel 112, as shown in fig. 5, the rotating dimming wheel 112 having a transmissive region 112t and a reflective region 112r. When the light-splitting device is used, the rotating dimming wheel 112 can be controlled to rotate, and the positions of the transmission region 112t and the reflection region 112r can be changed along with the rotation of the rotating dimming wheel 112 and can be alternatively rotated to the incident position of the first primary color light provided by the first light source assembly 100, so that the time-sharing light splitting function is realized. When the reflective region 112r of the rotating dimming wheel 112 rotates to the first primary light incident position, the first primary light provided by the first light source assembly 100 is reflected to the first light emitting channel through the reflective region 112r. When the transmissive region 112t of the rotating dimming wheel 112 rotates to the first primary light incident position, the first primary light provided by the first light source assembly 100 enters the second light emitting channel through the transmissive region 112t for further transmission to the fluorescent generator 120.

For example, the substrate of the rotating dimming wheel 112 can be coated in sections, such that the rotating dimming wheel 112 has the transmissive region 112t capable of transmitting the first primary color light and the reflective region 112r capable of reflecting the first primary color light. It should be noted that the sizes and the size ratios of the transmissive region 112t and the reflective region 112r shown in fig. 5 are only illustrative and not limiting. The actual size and ratio of the transmissive region 112t and the reflective region 112r are related to the size of the spot of the first primary color light on the rotating dimming wheel 112, the ratio of the duration of the first illumination period to the second illumination period, and the rotation rate.

In some examples, in order to conveniently transmit the first primary color light entering the second light exit channel to the fluorescent generator 120, the light source module 10 may further include: the first collimating lens 140 is disposed on a light transmission path between the second light-emitting channel of the time-sharing optical splitter 110 and the fluorescent light generator 120, so that the first primary color light entering the second light-emitting channel is collimated by the first collimating lens 140 and then transmitted toward the fluorescent light generator 120.

The fluorescent generator 120, under excitation of the first primary light, generates a second primary light to be output as an illumination light beam for a second illumination session. For example, in the case where the first primary light is a blue laser, the second primary light may be green light, that is, the fluorescent light generator 120 that generates green fluorescent light under excitation of blue light. For example, the fluorescent light emitter may use a green ceramic phosphor that is statically disposed, or may use an omni-directional green fluorescent wheel, etc., which is not limited herein. Because fluorescence generator 120 can produce second primary color light under the effect of exciting light, need not to set up the colour wheel module in addition and filter, fluorescence generator 120 also need not the subregion, also need not to consider the synchronization of fluorescence generator 120 with the colour wheel module yet, has reduced the synchronism control requirement effectively, and easier control and heat dissipation are favorable to reducing the module cost.

Further, the light source module 10 may further include: and the first collimating lens group 121 is disposed on the light-emitting side of the fluorescent generator 120, so that the second primary color light generated by the fluorescent generator 120 is output after being collimated by the first collimating lens group 121, and is used as a projection illumination light beam. In addition, the first collimating lens group 121 can be further used to converge the incident first primary color light to the fluorescent generator 120 to reduce the beam diameter of the excitation light, thereby facilitating the reduction of the size of the fluorescent generator 120. The first collimating lens group 121 may be a single lens, or may be a combination of a plurality of lenses, for example, may include a first lens 122 and a second lens 123, according to the configuration of the actual light path for collimation and convergence.

Of course, in addition to the time-division supply of the first primary color light and the second primary color light as the illumination light beams for projection, it is necessary to supply the third primary color light to realize color picture display. In this embodiment, the second light source assembly 130 is configured to provide the third primary color light to be output as the illumination light beam.

As shown in fig. 2, the second light source assembly 130 includes: a light source 131 for generating light of the third primary color. The light source 131 may be an LED light source or a laser light source. For example, when the first primary color light is a blue laser and the second primary color light is a green light, the third primary color light is a red light, and accordingly, the light source 131 is a red LED light source or a red laser light source, and the like, and red light can be output without wavelength conversion and color filtering, which is beneficial to improving the utilization rate of the light source.

Taking the LED light source as the light source 131, considering that the LED light source belongs to a point light source, in order to improve the utilization rate of the third primary color light, the second light source assembly 130 may further include: and the second collimating lens group is arranged on the light-emitting side of the LED light source, so that third primary color light generated by the LED light source is emitted after being collimated by the second collimating lens group and is used as a projection illumination light beam. The second collimating lens group may be a single lens, or may be a combination of a plurality of lenses, according to the configuration of the collimation requirement of the actual light path, for example, as shown in fig. 2, the second collimating lens group may include a third lens 132 and a fourth lens 133.

Further, in order to increase the brightness of the third primary color light output by the light source module 10 in consideration of the fact that the light emitting brightness of the LED light source is weaker than that of the laser light source 101, as shown in fig. 6, the second light source assembly 130 may include: the LED light source combination of two wavelengths includes a first LED light source 131a and a second LED light source 131b, and the first LED light source 131a and the second LED light source 131b are used for emitting third primary color light with different wavelengths. Taking the third primary color light as red light for example, the first LED light source 131a may be a red LED light source with a peak wavelength of 612nm, and the second LED light source 131b may be a red LED light source with a peak wavelength of 650 nm.

At this time, the second light source assembly 130 may further include: and a light coupling element 134 for coupling together the third primary color light emitted from the first LED light source 131a and the third primary color light emitted from the second LED light source 131 b. For example, the optical coupling element 134 may be a dichroic mirror capable of transmitting the third primary light of the first wavelength and reflecting the third primary light of the second wavelength. As shown in fig. 6, the third primary color light provided by the first LED light source 131a is collimated by the third lens 132a and the fourth lens 133a, transmitted through the light coupling element 134, and incident on the second light splitting element 170; the third primary color light provided by the second LED light source 131b is collimated by the third lens 132b and the fourth lens 133b, and then reflected to the second light splitting element 170 through the light coupling element 134. It should be noted that the optical coupling element 134 may also be another applicable optical element, which is not limited in this embodiment.

When the light source module 10 provided in this embodiment is applied to a projection apparatus with a single light valve, the first primary color light, the second primary color light, and the third primary color light provided by the light source module 10 are irradiated onto the same light valve 20 at different times, so as to realize color image display through temporal color mixing. At this time, the second light source assembly 130 is used to output the third primary color light during the third illumination period. The third illumination period is a different period from the first illumination period and the second illumination period. The first illumination period, the second illumination period, and the third illumination period are illumination times of the first primary color light, the second primary color light, and the third primary color light, respectively, in each scanning period in which one frame image is scanned. It should be noted that, in this embodiment, the order of the first illumination period, the second illumination period, and the third illumination period is not limited, and in actual use, the driving timing sequence of the corresponding light valve 20 needs to be set in cooperation, so that the three primary color lights sequentially irradiate the same light valve 20 according to the corresponding control timing sequence.

For example, fig. 7 shows a control timing chart of the light source module 10. In the figure, G1 represents a switching control signal of the laser light source 101, and the high level is on and the low level is off. G2 represents a control signal of the time-sharing optical splitter 110, and controls the first primary color light to be transmitted to the first light-emitting channel at a high level, and controls the first primary color light to be transmitted to the second light-emitting channel at a low level. G3 represents a switch control signal of the LED light source, and the high level is turned on and the low level is turned off. T denotes an illumination cycle corresponding to one frame of color image, T1 denotes a first illumination period, T2 denotes a second illumination period, and T3 denotes a third illumination period. It should be noted that the control timing chart shown in fig. 7 is merely an illustration, not a limitation, and it is actually necessary to match the driving timing arrangement of the light valve 20.

When the light source module 10 provided in this embodiment is applied to a projection apparatus with two light valves, the first primary color light and the second primary color light provided by the light source module 10 can be irradiated to the same light valve 20 in a time-sharing manner, and the third primary color light is irradiated to the other light valve 20. At this time, the illumination period of the third primary color light may overlap with the first illumination period and the second illumination period, and needs to be set in accordance with the driving timing of the corresponding light valve 20, which is not limited in this embodiment.

When the light source module provided by this embodiment is applied to a projection apparatus with dual light valves, the first primary color and the second primary color provided by the light source module 10 illuminate the first light valve in a time-sharing manner; the third primary color irradiates the second light valve, so that the utilization rate of the light source module is fully improved.

Taking the projection apparatus applied to the single light valve 20 as an example, in order to conveniently guide the three primary colors of light outputted by the light source module 10 in a time-sharing manner to the same light valve 20, the first primary color, the second primary color, and the third primary color of light which are time-shared as the illumination light beams may be further optically coupled. For example, the light source module 10 may further include: a set of circuit mirrors 150, a first beam splitting element 160 and a second beam splitting element 170.

The loop mirror group 150 is disposed in the first light-emitting channel between the time-sharing optical splitter 110 and the first light-splitting element 160, and is configured to collimate the first primary color light entering the first light-emitting channel and adjust a transmission direction of the collimated first primary color light, so that the collimated first primary color light is transmitted to the first light-splitting element 160. For example, the set of loop mirrors 150 may include: a second collimating lens 151, a first mirror 152, a third collimating lens 153, and a second mirror 154.

The first light splitting element 160 is configured to transmit the first primary light and reflect the second primary light, so as to realize optical path coupling of the first primary light and the second primary light. The second dichroic element 170 is configured to transmit the first primary color light and the second primary color light, and reflect the third primary color light, so as to implement optical path coupling of the first primary color light, the second primary color light, and the third primary color light.

When in use, the first primary color light transmitted to the first light-emitting channel by the time-sharing optical splitter 110 is collimated and refracted by the loop mirror set 150, and then sequentially output through the first light-splitting element 160 and the second light-splitting element 170. The first primary color light transmitted to the second light-emitting channel by the time-division optical splitter 110 is transmitted to the fluorescent light generator 120 through the first light-splitting element 160, and the second primary color light output by the fluorescent light generator 120 is reflected to the second light-splitting element 170 through the first light-splitting element 160 and is output through the second light-splitting element 170. The third primary color light output by the second light source assembly 130 is reflected by the second light splitting element 170 and then output. This makes it possible to combine the three primary colors after passing through the second dichroic filter 170.

Further, the light source module 10 may further include: the light homogenizing element 180 is disposed on the light emitting side of the second light splitting element 170, and the first primary color light, the second primary color light and the third primary color light output by the second light splitting element 170 are output after being subjected to light field homogenization processing by the light homogenizing element 180, so as to be uniformly irradiated onto the corresponding light valve 20. For example, as shown in fig. 2, the light uniformizing element 180 may be a fly-eye lens array. Alternatively, as shown in fig. 8, the light uniformizing element 180 may also include a second focusing lens 181 and a light rod 182, and the first primary color light, the second primary color light and the third primary color light output by the second light splitting element 170 are converged into the light rod 182 through the second focusing lens 181, so as to realize light field uniformization.

In order to more clearly understand the technical solution provided by the present disclosure, the following describes the operation process of the light source module 10 by taking the first primary color light as a blue laser, the second primary color light as a green light, and the third primary color light as a red light according to the embodiment shown in fig. 2.

The blue laser beam provided by the laser source 101 is focused to the time-sharing optical splitter 110 after being converged by the first focusing lens 102. In the first illumination period, the time-sharing optical splitter 110 transmits the blue laser beam to the loop mirror group 150, collimates the blue laser beam through the loop mirror group 150, transmits the collimated blue laser beam to the first light splitting element 160, sequentially transmits the first light splitting element 160 and the second light splitting element 170, enters the dodging element 180, performs light field homogenization treatment, and irradiates the light valve 20 as the projection illumination beam in the first illumination period, so as to form a blue sub-image on the projection screen.

In the second illumination period, the time-sharing optical splitter 110 transmits the blue laser beam to the first collimating lens 140, is collimated by the first collimating lens 140, transmits to the first light splitting element 160, transmits from the first light splitting element 160, and is converged to the fluorescent generator 120 through the first collimating lens group 121. The fluorescent generator 120 generates a green light beam upon excitation by a blue laser. The green light beam is collimated by the first collimating lens group 121, reflected to the second beam splitting element 170 by the first beam splitting element 160, transmitted to the dodging element 180 through the second beam splitting element 170, and subjected to light field homogenization by the dodging element 180 to be irradiated to the light valve 20 as a projection illumination beam in a second illumination period, so as to form a green sub-image on the projection screen.

In a third illumination period, the LED light source provides a red light beam, the red light beam is collimated by the second collimating lens group and then enters the second light splitting element 170, and is reflected to the dodging element 180 by the second light splitting element 170, and after the light field homogenization treatment is performed by the dodging element 180, the red light beam is irradiated on the light valve 20 as a projection illumination light beam in the third illumination period to form a red sub-image on the projection screen, so that the temporal color mixing is performed by using the visual inertia of human eyes, and the color image display is realized.

In the process, the blue light illumination light beam is provided by the laser light source 101, the green light illumination light beam is provided by the blue light laser excited green fluorescent body, and the red light illumination light beam is provided by the LED light source, so that the color image quality is ensured, and the speckle effect is inhibited.

Those of ordinary skill in the art will understand that: the discussion of any embodiment above is merely exemplary in nature, and is not intended to intimate that the scope of the disclosure is limited to these examples; features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the disclosure as described above, which are not provided in detail for the sake of brevity, within the spirit of the disclosure.

While exemplary embodiments of the present disclosure have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including exemplary embodiments and all changes and modifications that fall within the scope of the present disclosure.

In a first aspect, an embodiment of the present disclosure provides a light source module, including: a first light source component, a time-sharing optical splitter and a fluorescent generator,

the first light source component is used for providing first primary color light;

the time-sharing optical divider is used for transmitting the first primary light to the first light-emitting channel to be output as the illumination light beam in a first illumination period and transmitting the first primary light to the second light-emitting channel to be transmitted to the fluorescent generator in a second illumination period, wherein the first illumination period and the second illumination period are different periods;

the fluorescent generator is used for generating second primary color light under the excitation of the first primary color light to serve as an illumination light beam to be output.

Further, in the light source module provided in the first aspect, the time division optical splitter may include: an optical path selecting element and a driving mechanism; the driving mechanism controls the movement of the optical path selecting element to cause the first primary color light to selectively transmit through or reflect from the optical path selecting element.

Further, in the light source module provided in the first aspect, the light path selecting element may be a light adjusting element, the driving mechanism is connected to the light adjusting element for driving the light adjusting element to deflect,

when the dimming element deflects to a first preset position, the first primary color light provided by the first light source assembly is reflected to the first light-emitting channel by the dimming element, and when the dimming element deflects to a second preset position, the first primary color light provided by the first light source assembly penetrates through the dimming element and enters the second light-emitting channel so as to be transmitted to the fluorescent generator.

Furthermore, the refractive index of the material of the light modulation element is greater than the refractive index of air, when the light modulation element deflects to a first preset position, the incident angle of the first primary color light on the rear surface of the light modulation element is greater than a total reflection critical angle and less than 90 degrees, when the light modulation element deflects to a second preset position, the incident angle of the first primary color light on the rear surface of the light modulation element is greater than or equal to 0 degree and less than the total reflection critical angle, wherein the rear surface of the light modulation element is a surface deviating from the first light source assembly, and the total reflection critical angle is a critical angle at which the first primary color light is totally reflected when entering air from the rear surface.

Further, in the light source module provided in the first aspect, the optical path selecting element may be a rotary dimming wheel, the rotary dimming wheel having a transmissive region and a reflective region,

when the reflection region of the rotary dimming wheel rotates to the first primary color light incidence position, the first primary color light provided by the first light source component is reflected to the first light-emitting channel through the reflection region;

when the transmission region of the rotary dimming wheel rotates to the first primary color light incidence position, the first primary color light provided by the first light source component penetrates through the transmission region to enter the second light-emitting channel so as to be transmitted to the fluorescent generator.

Further, in the light source module provided in the first aspect, the first light source assembly includes: the laser device comprises a laser light source and a first focusing lens, wherein the first focusing lens is arranged on an optical transmission path between the laser light source and a time-sharing optical splitter and used for converging first primary color light output by the laser light source, and the time-sharing optical splitter is arranged near the focus of the first focusing lens.

Further, the light source module provided in the first aspect may further include: a loop mirror group, a first light splitting element and a second light splitting element, wherein the loop mirror group is arranged in a first light outlet channel between the time-sharing light splitter and the first light splitting element,

the first primary color light transmitted to the first light-emitting channel is collimated and refracted by the loop mirror group and then sequentially output through the first light-splitting element and the second light-splitting element;

the first primary color light transmitted to the second light-emitting channel is transmitted to the fluorescent generator through the first light-splitting element, and the second primary color light output by the fluorescent generator is reflected to the second light-splitting element through the first light-splitting element and then is output through the second light-splitting element.

Further, the light source module further comprises: and the second light source assembly is used for providing third primary color light in a third illumination period and enabling the third primary color light to be output after being reflected by the second light splitting element, wherein the third illumination period is different from the first illumination period and the second illumination period.

Further, the light source module may further include: and the light homogenizing element is arranged on the light emergent side of the second light splitting element, and the first primary color light, the second primary color light and the third primary color light output by the second light splitting element are output after light field homogenization treatment of the light homogenizing element.

Further, the light source module provided in the first aspect further includes: a second light source assembly for providing a third primary light, the second light source assembly comprising: and a red LED light source. The first primary color light is blue laser, the second primary color light is green light, and the third primary color light is red light.

Further, in the light source module provided in the first aspect, the fluorescent generator may be: a green ceramic phosphor, or an omni-directional green fluorescent wheel.

In a second aspect, an embodiment of the present disclosure provides a projection apparatus, including: a light valve, a projection lens and the light source module provided by the first aspect. The first primary color light, the second primary color light and the third primary color light output by the light source module are irradiated on a screen through the light valve and the projection lens so as to display a color image.

Claims (12)

1. A light source module, comprising: a first light source component (100), a time-sharing optical splitter (110) and a fluorescent generator (120),

the first light source assembly (100) is used for providing first primary color light;

the time-sharing optical splitter (110) is configured to transmit the first primary light to a first light-exit channel for output as an illumination light beam during a first illumination period, and to transmit the first primary light to a second light-exit channel for transmission to a fluorescent generator (120) during a second illumination period, wherein the first illumination period and the second illumination period are different periods;

the fluorescent generator (120) is configured to generate second primary light to be output as an illumination beam upon excitation of the first primary light.

2. The light source module according to claim 1, wherein the time-sharing optical splitter (110) comprises: an optical path selecting element and a driving mechanism;

the driving mechanism controls the light path selection element to move so that the first primary color light selectively transmits through or is reflected by the light path selection element.

3. The light source module according to claim 2, wherein the light path selecting element is a light modulating element (111), the driving mechanism is connected to the light modulating element (111) for driving the light modulating element (111) to deflect,

when the dimming element (111) is deflected to a first preset position, the first primary light provided by the first light source assembly (100) is reflected to the first light-emitting channel by the dimming element (111), and when the dimming element (111) is deflected to a second preset position, the first primary light provided by the first light source assembly (100) penetrates through the dimming element (111) to enter the second light-emitting channel so as to be transmitted to the fluorescent generator (120).

4. The light source module according to claim 3, wherein a material refractive index of the dimming element (111) is greater than a refractive index of air, an incident angle of the first primary light on the rear surface of the dimming element (111) is greater than a total reflection critical angle and less than 90 degrees when the dimming element (111) is deflected to the first preset position, and the incident angle of the first primary light on the rear surface of the dimming element (111) is greater than or equal to 0 degree and less than the total reflection critical angle when the dimming element (111) is deflected to the second preset position, wherein the rear surface of the dimming element (111) is a surface facing away from the first light source assembly (100), and the total reflection critical angle is a critical angle at which the first primary light is totally reflected when entering air from the rear surface.

5. The light source module according to claim 2, wherein the light path selecting element is a rotating dimming wheel (112), the rotating dimming wheel (112) having a transmissive region and a reflective region,

when the reflection region of the rotating dimming wheel (112) rotates to a first primary color light incidence position, the first primary color light provided by the first light source assembly (100) is reflected to the first light outlet channel through the reflection region;

when the transmission region of the rotating dimming wheel (112) rotates to the first primary light incidence position, the first primary light provided by the first light source assembly (100) enters the second light-emitting channel through the transmission region to be transmitted to the fluorescent generator (120).

6. The light source module according to claim 1, wherein the first light source assembly (100) comprises: the laser light source (101) and the first focusing lens (102), the first focusing lens (102) is arranged on an optical transmission path between the laser light source (101) and the time-sharing optical splitter (110) and is used for converging the first primary color light output by the laser light source (101), and the time-sharing optical splitter (110) is arranged near the focus of the first focusing lens (102).

7. The light source module of claim 1, further comprising: a set of loop mirrors (150), a first light splitting element (160) and a second light splitting element (170), wherein the set of loop mirrors (150) is arranged in the first light outgoing channel between the time-sharing optical splitter (110) and the first light splitting element (160),

the first primary color light transmitted to the first light-emitting channel is collimated and refracted by the loop mirror group (150), and then sequentially output through the first light splitting element (160) and the second light splitting element (170);

the first primary color light transmitted to the second light-emitting channel is transmitted to the fluorescent generator (120) through the first light-splitting element (160), and the second primary color light output by the fluorescent generator (120) is reflected to the second light-splitting element (170) through the first light-splitting element (160) and then output through the second light-splitting element (170).

8. The light source module according to claim 7, further comprising: a second light source assembly (130), the second light source assembly (130) being configured to provide a third primary color light in a third illumination period, and to output the third primary color light after being reflected by the second light splitting element (170), wherein the third illumination period is different from the first illumination period and the second illumination period.

9. The light source module of claim 8, further comprising: and the light homogenizing element (180) is arranged on the light outlet side of the second light splitting element (170), and the first primary color light, the second primary color light and the third primary color light output by the second light splitting element (170) are output after being subjected to light field homogenization treatment by the light homogenizing element (180).

10. The light source module of claim 1, further comprising: a second light source assembly (130) for providing a third primary light, the second light source assembly (130) comprising: a red LED light source;

the first primary color light is blue laser, the second primary color light is green light, and the third primary color light is red light.

11. The light source module according to claim 1, wherein the fluorescent generator (120) is: a green ceramic phosphor, or an omni-directional green fluorescent wheel.

12. A projection device, comprising:

the light source module of any one of claims 1-11;

a light valve; and

a projection lens;

the first primary color light, the second primary color light and the third primary color light output by the light source module are irradiated on a screen through the light valve and the projection lens to display a color image.

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