CN114167668A

CN114167668A - Ultra-short-focus projection equipment and light source device thereof

Info

Publication number: CN114167668A
Application number: CN202111501499.0A
Authority: CN
Inventors: 黄佩璇; 欧阳剑; 闫国枫; 张聪; 胡震宇
Original assignee: Shenzhen Huole Science and Technology Development Co Ltd
Current assignee: Shenzhen Huole Science and Technology Development Co Ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-03-11
Anticipated expiration: 2041-12-09
Also published as: CN114167668B

Abstract

The utility model relates to an ultra-short focus projection equipment and a light source device thereof, the light source device comprises a light guide module, a spatial light modulator, a photosensitive chip, a light source module and a drive module, the projection equipment has a projection mode and a camera shooting mode, wherein, the drive module is configured to be capable of driving at least one of the photosensitive chip, the light guide module and the spatial light modulator to move so as to switch to the camera shooting mode or the projection mode, when the projection mode is adopted, the drive module switches the spatial light modulator to a light path so that the spatial light modulator can receive light from the light source module through the light guide module and emit the light through the light guide module; in the image pickup mode, the drive module switches the photosensitive chip into the light path so that the photosensitive chip can receive image light. The ultra-short-focus projection equipment using the light source device can have the camera shooting function and the projection function at the same time, and is favorable for realizing more accurate image correction by utilizing the camera shooting function of the ultra-short-focus projection equipment.

Description

Ultra-short-focus projection equipment and light source device thereof

Technical Field

The present disclosure relates to the field of projection technologies, and in particular, to an ultra-short-focus projection apparatus and a light source device thereof.

Background

In the traditional ultra-short-focus projection equipment, the function of automatically correcting images is difficult to realize due to the image distortion and the arrangement angle of a camera. Moreover, the projection of the ultra-short focal lens is small, the camera used for capturing the screen is very close to the screen, and the traditional wide-angle camera needs to capture the whole screen frame picture at the position of the close distance. In summary, the conventional ultra-short focus projection apparatus cannot use its own camera to achieve automatic image correction of an ultra-short focus screen.

Disclosure of Invention

An object of the present disclosure is to provide an ultra-short focus projection apparatus and a light source device thereof to at least partially solve the problems in the related art.

In order to achieve the above object, in a first aspect, the present disclosure provides a light source device applied to an ultra-short focus projection apparatus, the light source device including a light guiding module, a spatial light modulator, a photosensitive chip, a light source module, and a driving module, the light source device having a projection mode and a camera mode, wherein the driving module is configured to be able to drive at least one of the photosensitive chip, the light guiding module, and the spatial light modulator to move so as to switch to the camera mode or the projection mode;

in the projection mode, the driving module switches the spatial light modulator into a light path, so that the spatial light modulator can receive light from the light source module through the light guide module and emit the light through the light guide module;

and when in the shooting mode, the driving module switches the photosensitive chip into a light path so that the photosensitive chip can receive image light.

Optionally, the light source device further includes a correction processor, the correction processor is electrically connected to the photosensitive chip, and the correction processor is configured to correct the projection image in the projection mode according to the image acquired by the photosensitive chip.

Optionally, the light source device includes a housing and a support frame rotatably mounted on the housing, the photosensitive chip and the spatial light modulator are both mounted on the support frame, and the driving module can drive the support frame to rotate, so that the photosensitive chip or the spatial light modulator faces the light guiding module.

Optionally, the light source device further includes a heat sink mounted in the support frame.

Optionally, the support frame includes a bottom plate mounted on the housing and at least two side plates disposed on the bottom plate, the heat sink is accommodated in a space enclosed by the bottom plate and the side plates, and the photosensitive chip and the spatial light modulator are respectively disposed on outer side walls of different side plates.

Optionally, the driving module includes a motor, a driving member connected to the motor, and a transmission member connected to the driving member, the transmission member can be driven by the driving member to rotate, and the support frame is connected to the transmission member.

Optionally, the light guide module is configured to be disposed on a light path between a lens module and the spatial light modulator, in the shooting mode, the driving module is configured to drive the photosensitive chip to switch to block the light path between the lens module and the light guide module and enable the photosensitive chip to face the lens module, and in the projection mode, the driving module is configured to drive the photosensitive chip to switch to the outside of the light path between the lens module and the light guide module so as to enable the light guide module to guide light with the lens module.

Optionally, the light guiding module includes a first light guiding element and a second light guiding element, the light sensing chip faces the first light guiding element, the second light guiding element is used for being arranged on a light path between the lens module and the spatial light modulator, in the image capturing mode, the driving module is configured to drive the first light guiding element to be switched to block the light path between the lens module and the second light guiding element and enable the first light guiding element to guide light from the lens module to the light sensing chip, and in the projection mode, the driving module is configured to drive the first light guiding element to be switched out of the light path between the lens module and the second light guiding element so as to enable the second light guiding element to guide light with the lens module.

Optionally, the light guiding module includes two reflecting prisms with matching shapes, in the image capturing mode, the driving module can drive to enable the two reflecting prisms to be in butt joint, so that the light emitting surfaces of the two butted reflecting prisms face the photosensitive chip, and in the projection mode, the driving module can drive to enable the two reflecting prisms to be separated to form an RTIR prism system, so that the light emitting surfaces of the RTIR prism system face the spatial light modulator.

In a second aspect, the present disclosure further provides an ultra-short-focus projection apparatus, which includes a lens module and the light source device disclosed in the first aspect.

Optionally, the lens module includes a lens component and a reflector located at the light exit side of the lens component in the projection mode, where the reflector is configured to reflect light exiting from the lens component onto a screen, or is configured to reflect received light of the screen onto the lens component.

Through the technical scheme, the light source device in the embodiment of the disclosure drives at least one of the photosensitive chip, the light guide module and the spatial light modulator by using the driving module, so that the relative position among all the components of the light source device is changed, the path of light in the light source device is changed, and a camera shooting effect or a projection effect is achieved. The ultra-short-focus projection equipment using the light source device can have the camera shooting function and the projection function at the same time, and is favorable for realizing more accurate image correction by utilizing the camera shooting function of the ultra-short-focus projection equipment.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is an exploded schematic view of an ultra-short focus projection apparatus provided by an exemplary embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of an ultra-short-focus projection apparatus provided in an exemplary embodiment of the present disclosure;

fig. 3 is a schematic diagram of an ultra-short focus projection apparatus provided by an embodiment of the present disclosure in a projection mode;

FIG. 4 is a schematic diagram of the ultra-short focus projection apparatus shown in FIG. 3 in an image capture mode;

FIG. 5 is a partial cross-sectional view of the heat sink portion of FIG. 4;

fig. 6 is a schematic diagram of an ultra-short focus projection apparatus provided in another embodiment of the present disclosure in a projection mode;

fig. 7 is a schematic diagram of the ultra-short focus projection apparatus shown in fig. 6 in an image capturing mode;

fig. 8 is a schematic diagram of an ultra-short focus projection apparatus provided by yet another embodiment of the present disclosure in a projection mode;

fig. 9 is a schematic diagram of the ultra-short focus projection apparatus shown in fig. 8 in an image capturing mode;

fig. 10 is a schematic diagram of an ultra-short focus projection apparatus provided by yet another embodiment of the present disclosure in a projection mode;

fig. 11 is a schematic view of the ultra-short focus projection apparatus shown in fig. 10 in an image capturing mode.

Description of the reference numerals

100-lens module, 101-lens module, 102-reflector, 103-emergent lens, 104-mounting frame, 200-light guide module, 201-first light guide element, 202-second light guide element, 300-spatial light modulator, 400-photosensitive chip, 500-light source module, 600-driving module, 601-motor, 602-first gear, 603-second gear, 700-shell, 701-supporting frame, 7011-bottom plate, 7012-side plate, 702-radiator.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of the directional terms such as "upper and lower" are defined for convenience of description according to the direction of the drawing, and "inner and outer" are defined with respect to the self-profile of the corresponding component. Terms such as "first, second, and the like, used in the present disclosure are intended to distinguish one element from another element without order or importance. Further, in the following description, when referring to the figures, the same reference numbers in different figures denote the same or similar elements.

Referring to fig. 1 to 2, the present disclosure provides an ultra-short focus projection apparatus including a lens module 100 and a light source device, wherein the light source device includes a light guide module 200, a spatial light modulator 300, a photo-sensing chip 400, a light source module 500, and a driving module 600, the light guide module 200 may be disposed in a housing 700, and the lens module 100 may be disposed in a mounting frame 104, so as to facilitate integrated mounting of the components. Here, the lens module 100 is used for guiding light between a light source Device outside the apparatus and inside the apparatus, the light guide module 200 is used for guiding a light path inside the apparatus, the light source module 500 is used for emitting a light source inside the apparatus to the light guide module 200, the light of the light source module 500 may be formed by a plurality of lamps, the spatial light modulator 300 may include a DMD (Digital Mirror Device) chip or a LCOS (Liquid crystal on Silicon) chip, and the photosensitive chip 400 may include a CMOS (Complementary Metal Oxide Semiconductor) chip. The ultra-short-focus projection device and the light source device thereof in the embodiment of the disclosure have a projection mode and a shooting mode, and the driving module is configured to be able to drive at least one of the light guiding module 200, the spatial light modulator 300 and the photosensitive chip 400 to move, so as to change the light path, thereby switching to the shooting mode or the projection mode to work. In the projection mode, the driving module 600 can switch the spatial light modulator 300 into the optical path by driving at least one of the light guiding module 200, the spatial light modulator 300 and the light sensing chip 400, so that the spatial light modulator 300 can receive the light from the light source module 500 through the light guiding module 200, and refract the light to the lens module 100 through the light guiding module 200, thereby projecting the light to the screen for imaging. It should be noted that when the spatial light modulator 300 includes a DMD chip, the light guiding module 200 may include a TIR (Total Internal Reflection) prism, and when the spatial light modulator 300 includes an LCOS chip, the light guiding module 200 may include a PBS (polarization beam splitter prism). In the image capturing mode, the driving module 600 can switch the light sensing chip 400 into the light path by driving at least one of the light guiding module 200, the spatial light modulator 300 and the light sensing chip 400, so that the photo sensor chip 400 can receive light (image light) from the lens module 100, the light enters the lens module 100 from the outside, and can be emitted from the lens module 100 to the photo sensor chip 400, the chip signal can enter the digital signal processor to complete the image capturing, here, the photo sensor chip 400 can directly receive the light from the lens module 100, that is, the light-sensing chip 400 can be directly opposite to the lens module 100, the light directly reaches the light-sensing chip 400 after being emitted from the lens module 100, or the photosensitive chip 400 can also receive the light from the lens module 100 through the light guide module 200, that is, the photosensitive chip 400 does not face the lens module 100, and the light emitted from the lens module 100 first enters the light guide module 200 to be refracted and then reaches the photosensitive chip 400.

Through the above technical solution, the light source device in the embodiment of the present disclosure utilizes the driving module 600 to drive at least one of the photosensitive chip 400, the light guiding module 200 and the spatial light modulator 300, so that the relative position between each component of the light source device is changed, and thus the path of light in the light source device is changed, so as to achieve the image capturing effect or the projection effect. The ultra-short-focus projection equipment using the light source device can have the camera shooting function and the projection function at the same time, and is favorable for realizing more accurate image correction by utilizing the camera shooting function of the ultra-short-focus projection equipment.

The light source device of the projection apparatus may further include a correction processor (not shown in the figure) electrically connected to the photosensitive chip 400 to correct the projection pattern in the projection mode according to the image acquired by the photosensitive chip 400 in the image capturing mode. Specifically, when the projection apparatus needs to project, the driving module 600 may first switch the photosensitive chip 400 into the optical path to enable the apparatus to be in the image capturing mode, the photosensitive chip 400 may obtain an image of a screen to be projected through the lens module 100, then the driving module 600 switches the spatial light modulator 300 into the optical path to enable the apparatus to be in the projection mode, and the correction processor may correct the image to be projected according to the image obtained by the photosensitive chip 400. It should be noted that the correction includes, but is not limited to, correction modes that can improve the projection effect, such as screen alignment, focusing, trapezoidal correction, and obstacle avoidance projection. Taking the screen as an example, the device can capture the screen frame before projection by using the camera shooting function of the device, and the camera shooting mode and the projection mode share the ultra-short-focus lens module 100, so that the low-distortion and large-wide-angle image during camera shooting can be realized, and more accurate screen alignment is favorably realized.

In the embodiment of the present disclosure, referring to fig. 1 to 4 and 6 to 11, wherein the exit lens 103 is omitted in fig. 3 to 4 and 6 to 11 for convenience of subsequent description, the lens module 100 of the ultra-short focus projection apparatus may include a lens assembly 101 and a reflector 102 located on a light exit side of the lens assembly 101 in a projection mode, and the reflector 102 is used for reflecting light exiting from the lens assembly onto a screen or reflecting received light of the screen onto the lens assembly 101. In addition, in an embodiment of the disclosure, the light exit side of the reflector 102 located in the projection mode may also be provided with an exit lens 103 to protect the lens assembly 101, and light may be directly reflected from the exit lens 103 to a suitable position of the screen, so that the projection image is on one side of the ultra-short-focus projection device, and the view line is prevented from being blocked by the ultra-short-focus projection device when the viewer watches the projection image. In the projection mode, light emitted from the light guide module 200 enters the lens assembly 101, is reflected by the reflector 102, and then is projected to a screen from the emergent lens 103; in the image capturing mode, light enters from the exit mirror 103 and is refracted to the lens assembly 101 through the reflector 102, and then directly reaches the photosensitive chip 400 or reaches the photosensitive chip 400 through the light guiding module 200 for imaging. The lens assembly 101 may include a plurality of lenses and a barrel for mounting the lenses, the reflector 102 may be a spherical reflector, the lenses and the exit lenses 103 are respectively mounted in the reflecting direction of the reflector 102, for example, the reflecting direction of the reflector 102 may be two perpendicular directions, and the lenses and the exit lenses 103 may be disposed on two perpendicular sides of the reflector 102. The lens module 100 has the advantage of large-angle reflection projection, can realize 100-inch image shooting in a short distance, and has a larger visual angle compared with a traditional camera. Moreover, the lens module 100 has a plurality of lenses, and the image distortion can be reduced at an angle in a close range in an oblique direction by the reflection of the plurality of lenses, so that the imaging quality is higher than that of a traditional camera. The ultra-short-focus projection device in the embodiment of the present disclosure can realize the frame shooting of the ultra-wide-angle and low-distortion projection screen at a position 40cm to 60cm away from the screen and at an elevation angle of 75 degrees to 85 degrees by combining the photosensitive chip 400 and the lens module 100.

In one embodiment, referring to fig. 3 and 4, the light source device of the projection apparatus may include a support frame 701 rotatably mounted on the housing 700, the driving module 600 may drive the support frame 701 to rotate, the photo sensor chip 400 and the spatial light modulator 300 may be respectively mounted on the support frame 701, when the driving module 600 drives the support frame 701 to rotate, the photosensitive chip 400 or the spatial light modulator 300 may be directed toward the light guiding module 200, the light directing module 200 may include, but is not limited to, a triangular prism as shown in fig. 3 and 4, such as a triangular prism having a cross-section of a right triangle, one of the right-angled sides of the prism may face the lens module 100, the other right-angled side may face the chip, the inclined surface may face the light source module 500, in other embodiments, the light guiding module 200 may also include prisms with other structures and other arrangements to achieve the desired light guiding effect. The spatial light modulator 300 and the photosensitive chip 400 may be mounted on two adjacent sides of the supporting frame 701, for example, on two vertical sides of the supporting frame 701 when the supporting frame 701 is a square frame. In the projection mode shown in fig. 3, the spatial light modulator 300 faces the light guiding module 200, the path of the light is shown by the dotted line with an arrow in the figure, and the light from the light source module 500 enters the light guiding module 200 and reaches the spatial light modulator 300, and then is reflected by the light guiding module 200 to reach the lens module 100 and then is projected onto the screen. When it is necessary to switch to the image capturing mode, the driving module 600 drives the supporting frame 701 to rotate a certain angle, for example, ninety degrees, so that the photosensitive surface of the photosensitive chip 400 faces the light guiding module 200, and the light path enters the photosensitive chip 400 in the opposite direction to the aforementioned projection mode, and the path of the light is shown by the dotted line with an arrow in fig. 4, which is not described in detail here. In the embodiment shown in fig. 3 and 4, the spatial light modulator 300 and the photosensitive chip 400 are switched by rotating the supporting frame 701, in other embodiments, the positions of the two chips may be switched by other manners, for example, by a translation manner, taking the direction of the drawing of fig. 3 and 4 as an example, the two chips may be installed under the light guiding module 200 in a manner of moving left and right, and when the mode needs to be switched, the corresponding chip is located right under the light guiding module 200 in a manner of moving left and right to receive light.

Referring to fig. 1 to 5, the light source device of the projection apparatus may further include a heat sink 702 mounted in the support frame 701, where the support frame 701 and the heat sink 702 may be two separate components, and the support frame 701 may also be a housing of the heat sink 702 itself, so as to reduce the number of components. The heat sink 702 can dissipate heat from the chip, thereby ensuring the working performance of the chip. In other embodiments, the heat sink 702 may also be mounted on the housing 700 to dissipate heat of the chip, so that the weight of the supporting frame 701 may be reduced, and the power consumption of the driving module 600 may be reduced.

The supporting frame 701 may include a bottom plate 7011 installed on the housing 700 and at least two side plates 7012 (preferably, both the two side plates 7012 are perpendicular to the bottom plate 7011) disposed on the bottom plate 7011, the heat sink 702 is accommodated in a space defined by the bottom plate 7011 and the side plates 7012, the light sensing chip 400 and the spatial light modulator 300 may be respectively disposed on outer sidewalls of different side plates 7012, and the side plates 7012 may provide a suitable mounting position for the chip. Referring to fig. 1, the number of the side panels 7012 may be two, and the spatial light modulator 300 and the photo-sensing chip 400 may be mounted on one side panel 7012, respectively. The quantity of curb plate 7012 also can be four settings in four sides of bottom plate 7011, wherein the curb plate 7012 of a set of offside can set up spatial light modulator 300, the curb plate 7012 of another set of offside can set up photosensitive chip 400, like this, when switching over between the mode of making a video recording and the projection mode, it can all the time clockwise or anticlockwise rotation to control drive module 600 drive support frame 701, if when drive module 600 includes following motor, the motor need not repeated corotation and reversal come the switching mode, this control to drive module 600 both of having convenient for, the structure of motor has also been simplified, and cost is reduced.

In the embodiment of the present disclosure, the driving module 600 may include a motor 601, and an output end of the motor 601 may be directly connected to the supporting frame 701 to drive the supporting frame 701 to rotate. In other embodiments, the driving module 600 may further include a driving member connected to the motor and a transmission member connected to the driving member, the transmission member can be driven by the driving member to rotate, and the supporting frame 701 may be connected to the transmission member to rotate along with the rotation of the transmission member. In one embodiment, referring to fig. 5, the driving member may include a first gear 602 coaxially connected to the motor 601, the transmission member may include a second gear 603 engaged with the first gear 602, the supporting frame 701 is connected to an output end of the second gear 603, and the motor 601 drives the first gear 602 to rotate, so as to drive the second gear 603 to rotate, and the transmission torque may be increased by means of gear transmission. In another embodiment, the driving member may include a gear connected to the motor, and the transmission member may include a belt sleeved on the periphery of the gear and a transmission gear disposed at the other end of the belt, so as to drive the transmission gear to rotate through the belt transmission, thereby driving the support frame 701 connected to the transmission gear to rotate. The specific form of the driving module 600 in the embodiment of the present disclosure is not limited thereto, and all manners capable of driving the supporting frame 701 to rotate are within the scope of the present disclosure.

In another embodiment, referring to fig. 6 and 7, the light guiding module 200 is disposed on the light path between the lens module 100 and the spatial light modulator 300, that is, the spatial light modulator 300 may be disposed with the light-sensing surface facing the light guiding module 200, unlike the above-mentioned embodiments, the spatial light modulator 300 is always facing the light guiding module 200, wherein the light guiding module 200 may include, but is not limited to, a triangular prism as shown in fig. 6 and 7, such as a triangular prism with a right-angled triangle cross section, one right-angled side of the triangular prism may face the lens module 100, the other right-angled side of the triangular prism may face the spatial light modulator 300, and the inclined surface may face the light source module 500, and in other embodiments, the light guiding module 200 may also include prisms with other structures and other arrangements to achieve the required light guiding effect. The photo sensor chip 400 is movably disposed between the light guide module 200 and the lens module 100, for example, when the housing 700 is provided, the photo sensor chip 400 can be movably mounted on a sidewall of the housing 700. Specifically, in the projection mode, the driving module 600 is configured to drive the light sensing chip 400 to switch out of the optical path between the lens module 100 and the light guiding module 200, so that the light guiding module 200 guides light to the lens module 100, that is, the light sensing chip 400 is not in the optical path in the current mode, as shown in fig. 6, a chain line with an arrow in the figure indicates the path of light in the mode, the light is emitted from the light source module 500 to the light guiding module 200, then reaches the spatial light modulator 300, and then is reflected by the light guiding module 200, and since there is no component capable of blocking the optical path between the light guiding module 200 and the lens module 100, the light is reflected to the lens module 100 and is projected on the screen; in the image capturing mode, the driving module 600 is configured to drive the light sensing chip 400 to switch to block the light path between the lens module 100 and the light guiding module 200, and to enable the light sensing chip 400 to face the lens module 100, that is, the light path is not incident into the light guiding module 200 any more, as shown in fig. 7, the dotted line with an arrow in the figure indicates the path of light in this mode, since the light sensing chip 400 prevents the light from being incident into the light guiding module 200, the light enters from the lens module 100 and then directly reaches the light sensing chip 400 to be captured, thereby completing the image capturing function. In the embodiment shown in fig. 6 and 7, the photosensitive chip 400 is disposed on the left side of the light guide module 200 in a manner of moving up and down, taking the direction of the drawing of fig. 6 and 7 as an example. In other embodiments, taking the direction of the drawing of fig. 6 and 7 as an example, the photosensitive chip 400 may also be disposed at the right side of the light guiding module 200, in this case, the light guiding module 200 may be disposed in a form capable of moving up and down, in the projection mode, the light guiding module 200 is located in the optical path between the photosensitive chip 400 and the lens module 100, and in the image capturing mode, the light guiding module 200 moves up or down to not shield the photosensitive chip 400 located at the right side thereof, so that the light entering the lens module 100 can reach the photosensitive chip 400 to complete the image capturing function. Here, the driving module 600 for driving the photosensitive chip 400 to move up and down or the light guide module 200 to move up and down may include a motor and a rack-and-pinion mechanism, wherein the motor drives the gear to rotate, and the gear drives the rack to translate, thereby driving the photosensitive chip 400 or the light guide module 200 connected to the rack to move. The driving module may also be a linear stepping motor, or a hydraulic cylinder, etc., which is not limited in this disclosure.

In some embodiments, referring to fig. 8 and 9, the light guiding module 200 may include a first light guiding element 201 and a second light guiding element 202, wherein the first light guiding element 201 and the second light guiding element 202 may both be prisms, or the first light guiding element 201 may also be a mirror, and in the embodiments shown in fig. 8 and 9, the first light guiding element 201 may include a wedge prism and the second light guiding element 202 may include a triangular prism. The light sensing chip 400 can face the first light guiding element 201, the second light guiding element 202 can face the second light guiding element 202, and the spatial light modulator 300 can face the second light guiding element 202, it can be understood that neither the spatial light modulator 300 nor the light sensing chip 400 faces the lens module 100, as in fig. 8 and 9, the light sensing chip 400 is located above the first light guiding element 201, and the spatial light modulator 300 is located below the second light guiding element 202, so that light guiding between the two and the lens module 100 is realized through the respective light guiding elements. In the projection mode, the driving module 600 is configured to drive the first light guiding element 201 to switch to the optical path between the lens module 100 and the second light guiding element 202, so that the light guiding module 200 and the lens module 100 guide light, that is, in the current mode, the first light guiding element 201 is not in the optical path, and therefore, the light is not guided to the light sensing chip 400, referring to fig. 8, a chain line with an arrow in fig. 8 indicates the optical path in this mode, and since the first light guiding element 201 is not in the optical path, the light of the light source module 500 can be reflected to the lens module 100 after reaching the spatial light modulator 300 through the second light guiding element 202, and is projected to the screen to complete the projection process; in the image capturing mode, the driving module 600 is configured to drive the first light guiding element 201 to switch to block the light path between the lens module 100 and the second light guiding element 202, that is, the light path does not enter the second light guiding element 202, and the first light guiding element 201 is located at a position capable of guiding the light from the lens module 100 to the photo-sensitive chip 400, referring to fig. 9, a chain line with an arrow in fig. 9 indicates the light path in this mode, and after the first light guiding element 201 moves down between the second light guiding element 202 and the lens module 100, the light from the lens module 100 is guided to the photo-sensitive chip 400. In this embodiment, the first light guiding member 201 is movable by being provided to change the optical path to switch to a different mode. Here, switching between the image capturing mode and the projection mode may be achieved by driving the first light guiding element 201 to move up and down, and the photosensitive chip 400 may be always located in the emitting direction of the first light guiding element 201 in the image capturing mode, or the photosensitive chip 400 and the first light guiding element 201 may be moved synchronously to ensure the distance between the two is determined, thereby ensuring the imaging effect. Here, the form of the driving module 600 may be the same as that of the driving module, and is not described herein again.

In some embodiments, referring to fig. 9 and 11, the light guiding module 200 may include two reflective prisms with matching shapes, where matching shapes refers to two reflective prisms having one surface that can be completely abutted, for example, when the two reflective prisms are right triangular prisms, the inclined surfaces of the two right triangular prisms can be completely abutted. In an embodiment, taking the plane direction shown in fig. 10 and 11 as an example, the spatial light modulator 300 may be disposed below the light guiding module 200, and the photosensitive chip 400 is disposed at the right side of the light guiding module 200, it is understood that the arrangement manner of the spatial light modulator 300 and the photosensitive chip 400 is not limited thereto, and those skilled in the art can appropriately adjust the positions of the spatial light modulator 300 and the photosensitive chip 400 according to the structure and position of the reflective prism, so as to satisfy the requirement that the spatial light modulator 300 is located at the light emitting side of the light guiding module 200 in the projection mode, and the photosensitive chip 400 is located at the light emitting side of the light guiding module 200 in the image capturing mode. In the embodiment of the disclosure, in the projection mode, the driving module 600 can drive the two reflective prisms to separate and form an RTIR (reflective Total Internal Reflection) prism system, so that the light emitting surface side of the RTIR prism system faces the spatial light modulator 300, referring to fig. 10, a dotted line with an arrow in fig. 10 indicates a path of light in the mode, the light passes through one reflective prism after being emitted from the light source module 500, and due to a gap formed between the two reflective prisms, the light is refracted into the other reflective prism and reaches the spatial light modulator 300, and then is reflected to the lens module 100 through the reflective prism for projection; in the image capturing mode, the driving module 600 can drive the two reflective prisms to be in butt joint, and eliminate a gap therebetween, so that the light emitting sides of the two butted reflective prisms face the photosensitive chip 400, referring to fig. 11, a chain line with an arrow in fig. 11 indicates a light path in this mode, after light enters from the lens module 100, the light path is changed due to the butt joint of the two reflective prisms, for example, a square plane mirror can be formed by butt joint, and the light can directly pass through the light guiding module 200 and reach the photosensitive chip 400 located on the other side of the light guiding module 200 and facing the lens module 100, thereby completing image capturing. In this embodiment, the switching between the projection mode and the imaging mode is realized by changing the path of light by adjusting the positions of the two reflection prisms. In other embodiments, the light guiding module 200 may also include, but is not limited to, more than two reflecting prisms, and the position between the prisms is adjusted according to the chip position, so that the light reaches the corresponding chip. Here, the driving module 600 may drive one of the two reflective prisms to move, or may drive the two reflective prisms to move simultaneously, and the form of the driving module 600 may be the same as that of the driving module, and is not described herein again.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A light source device applied to an ultra-short-focus projection device is characterized by comprising a light guide module (200), a spatial light modulator (300), a photosensitive chip (400), a light source module (500) and a driving module (600), wherein the light source device has a projection mode and a shooting mode, the driving module (600) is configured to be capable of driving at least one of the photosensitive chip (400), the light guide module (200) and the spatial light modulator (300) to move so as to switch to the shooting mode or the projection mode;

in the projection mode, the driving module (600) switches the spatial light modulator (300) into the optical path, so that the spatial light modulator (300) can receive the light from the light source module (500) through the light guide module (200) and emit the light through the light guide module (200);

in the image pickup mode, the driving module (600) switches the photosensitive chip (400) into an optical path so that the photosensitive chip (400) can receive image light.

2. The light source device according to claim 1, further comprising a correction processor electrically connected to the photosensitive chip (400), the correction processor being configured to correct the projected image in the projection mode according to the image acquired by the photosensitive chip (400).

3. The light source device according to claim 1, wherein the light source device comprises a housing (700) and a support frame (701) rotatably mounted on the housing (700), the photosensitive chip (400) and the spatial light modulator (300) are both mounted on the support frame (701), and the driving module (600) can drive the support frame (701) to rotate, so that the photosensitive chip (400) or the spatial light modulator (300) faces the light guiding module (200).

4. A light source device according to claim 3, characterized in that the light source device further comprises a heat sink (702) mounted in the support frame (701).

5. The light source device according to claim 4, wherein the supporting frame (701) includes a bottom plate (7011) mounted to the housing (700) and at least two side plates (7012) disposed on the bottom plate (7011), the heat sink (702) is accommodated in a space surrounded by the bottom plate (7011) and the side plates (7012), and the light sensing chip (400) and the spatial light modulator (300) are respectively disposed on outer sidewalls of the different side plates (7012).

6. The light source device according to claim 3, wherein the driving module (600) comprises a motor (601), a driving member connected to the motor (601), and a transmission member connected to the driving member, the transmission member being capable of being driven by the driving member to rotate, the supporting frame (701) being connected to the transmission member.

7. The light source device according to claim 1, wherein the light guiding module (200) is disposed on an optical path between a lens module (100) and the spatial light modulator (300), in the image capturing mode, the driving module (600) is configured to drive the light sensing chip (400) to switch to block the optical path between the lens module (100) and the light guiding module (200) and to enable the light sensing chip (400) to face the lens module (100), and in the projection mode, the driving module (600) is configured to drive the light sensing chip (400) to switch out of the optical path between the lens module (100) and the light guiding module (200) to enable the light guiding module (200) to guide light with the lens module (100).

8. The light source device according to claim 1, wherein the light guiding module (200) comprises a first light guiding element (201) and a second light guiding element (202), the light sensing chip (400) faces the first light guiding element (201), the second light guiding element (202) is disposed on an optical path between a lens module (100) and the spatial light modulator (300), in the image capturing mode, the driving module (600) is configured to drive the first light guiding element (201) to switch to block the optical path between the lens module (100) and the second light guiding element (202) and enable the first light guiding element (201) to guide light from the lens module (100) to the light sensing chip (400), and in the projection mode, the driving module (600) is configured to drive the first light guiding element (201) to switch to the lens module (100) and the second light guiding element (202) And the light path between the guide elements (202) is out, so that the second light guide element (202) and the lens module (100) are guided.

9. The light source device according to claim 1, wherein the light guiding module (200) comprises two reflecting prisms with matched shapes, in the image capturing mode, the driving module (600) can drive the two reflecting prisms to be butted, so that the light emitting surfaces of the two butted reflecting prisms face the photosensitive chip (400), and in the projection mode, the driving module (600) can drive the two reflecting prisms to be separated to form an RTIR prism system, so that the light emitting surfaces of the RTIR prism system face the spatial light modulator (300).

10. An ultra-short-focus projection apparatus, comprising a lens module (100) and a light source device according to any one of claims 1-9.

11. Ultra-short focus projection apparatus as claimed in claim 10, wherein the lens module (100) comprises a lens assembly (101) and a reflector (102) located at the light emitting side of the lens assembly (101) in the projection mode, the reflector (102) is used for reflecting the light emitted from the lens assembly (101) onto a screen or reflecting the received light of the screen to the lens assembly (101).