CN215067701U

CN215067701U - Light source system and projection system

Info

Publication number: CN215067701U
Application number: CN202120145119.3U
Authority: CN
Inventors: 杜鹏; 瞿玉丽; 李屹
Original assignee: Appotronics Corp Ltd
Current assignee: Shenzhen Appotronics Corp Ltd
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-12-07
Anticipated expiration: 2031-01-19

Abstract

The present application discloses a light source system and a projection system. The light source system includes: a first light-emitting component and a uniform light system, where the first light-emitting component is used to generate a first light beam; and the uniform light system is arranged on the outgoing light path of the first light-emitting component , used to homogenize the first beam; wherein, the fast axis direction of the first beam corresponds to the first direction of the homogenizing system, the slow axis direction of the first beam corresponds to the second direction of the homogenizing system, and the first direction is the direction in which the etendue of the dodging system is greater than the preset etendue, and the second direction is the direction in which the etendue of the dodging system is less than or equal to the preset etendue. In the above manner, the present application can eliminate streaks generated by 3D devices.

Description

Light source system and projection system

Technical Field

The application relates to the technical field of projection, in particular to a light source system and a projection system.

Background

For 3d (three dimensional) equipment used in cinema projection, two mutually perpendicular polarization beam splitters are generally used to split light emitted from a projector into three paths of light, specifically, a light beam transmitted through the two mutually perpendicular polarization beam splitters is a first path of image light, a light beam reflected by a first mirror is a second path of image light, and a light beam reflected by a second mirror is a third path of image light, wherein the second path of image light is reflected upward, the third path of image light is reflected downward, and the three paths of image light coincide on a screen; however, the first path of image light passes through the splicing position of the two mutually perpendicular polarization beam splitters to generate an invalid area on the screen, which causes the brightness of the middle spliced picture to be darker in actual viewing or obvious transverse stripes to appear in the center of the picture, and the more uneven the light beam emitted by the projector is, the worse the continuity of the light beam is, the more obvious the transverse stripes are, thus seriously affecting the viewing effect.

SUMMERY OF THE UTILITY MODEL

The application provides a light source system and a projection system, which can eliminate stripes generated by 3D equipment.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: there is provided a light source system comprising: the first light-emitting assembly is used for generating a first light beam; the dodging system is arranged on an emergent light path of the first light emitting assembly and used for dodging the first light beam; the fast axis direction of the first light beam corresponds to a first direction of the dodging system, the slow axis direction of the first light beam corresponds to a second direction of the dodging system, the first direction is a direction in which the etendue of the dodging system is larger than a preset etendue, and the second direction is a direction in which the etendue of the dodging system is smaller than or equal to the preset etendue.

In order to solve the technical problem, the technical scheme adopted by the application is as follows: the projection system comprises a 3D device and a light source system, wherein the light source system is used for generating an illumination light beam, and the 3D device is arranged on a light path of the light beam and used for performing projection display based on light source illumination.

Through the scheme, the beneficial effects of the application are that: the first light emitting assembly is used for generating a first light beam, and the light homogenizing system is arranged on the light path of the first light beam and can be used for homogenizing the first light beam; in order to improve the continuity of the angular distribution of the light beam emitted from the dodging system, the matching mode of the etendue is changed, the direction in which the etendue of the first light beam is smaller is set to correspond to the direction in which the etendue of the dodging system is larger, and the direction in which the etendue of the first light beam is larger is set to correspond to the direction in which the etendue of the dodging system is larger; the filling rate of the light spots of the first light beams in the direction with smaller optical expansion of the dodging system is increased, so that the angular distribution of the light beams emitted from the dodging system is relatively continuous, the continuity of the angular distribution is related to the image display effect, the better the continuity of the angular distribution is, and the displayed image is less prone to generating stripes, thereby solving the problem of the stripes generated by 3D equipment, and enabling the displayed 3D image to be continuous without the stripes.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:

FIG. 1(a) is a schematic diagram of an entrance laser spot of a dodging system;

FIG. 1(b) is a schematic view of the exit angle distribution of the dodging system corresponding to FIG. 1 (a);

FIG. 1(c) is a schematic diagram of the corresponding frame stripes of FIG. 1 (a);

FIG. 2(a) is another schematic diagram of an entrance laser spot of the dodging system;

FIG. 2(b) is a schematic view of the exit angle distribution of the dodging system corresponding to FIG. 2 (a);

FIG. 2(c) is a schematic diagram of the corresponding frame stripes of FIG. 2 (a);

FIG. 3(a) is a further schematic diagram of an entrance laser spot of the dodging system;

FIG. 3(b) is a schematic view of the exit angle distribution of the dodging system corresponding to FIG. 3 (a);

FIG. 3(c) is a schematic diagram of the corresponding frame stripes of FIG. 3 (a);

FIG. 4(a) is a further schematic diagram of the laser spot at the entrance of the dodging system;

FIG. 4(b) is a schematic view of the exit angle distribution of the dodging system corresponding to FIG. 4 (a);

FIG. 4(c) is a schematic diagram of the corresponding frame stripes of FIG. 4 (a);

FIG. 5 is a schematic structural diagram of a first embodiment of a light source system provided by the present application;

FIG. 6 is a schematic structural diagram of a second embodiment of a light source system provided by the present application;

FIG. 7 is a schematic structural diagram of a third embodiment of a light source system provided by the present application;

FIG. 8 is a schematic structural view of a regional diaphragm provided herein;

FIG. 9 is a schematic structural diagram of a light source system according to a fourth embodiment of the present application

Fig. 10 is a schematic structural diagram of a fifth embodiment of a light source system provided in the present application;

fig. 11 is a schematic structural diagram of a sixth embodiment of a light source system provided in the present application;

fig. 12 is a schematic structural diagram of a seventh embodiment of a light source system provided in the present application;

fig. 13 is a schematic structural diagram of an eighth embodiment of a light source system provided in the present application;

fig. 14 is a schematic structural diagram of a ninth embodiment of a light source system provided in the present application;

fig. 15 is a schematic structural diagram of an embodiment of a projection system provided in the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

When a square bar is used as a light homogenizing system for homogenizing light, a light spot is generated as shown in fig. 1(a), wherein a black rectangle represented by a background part is the square bar, and x and y respectively represent the length or width of the size of the square bar, so that the size of a visible light spot is smaller than the size of an entrance of the square bar, which causes the angular distribution of a light beam measured by an exit of the square bar to be discontinuous, as shown in fig. 1(b), the light spot is divided into a plurality of discrete sub-light spots, which causes a 3D picture finally presented to appear to have stripes as shown in fig. 1(c), and the viewing experience of a user is seriously influenced.

In order to solve the above problems, technicians perform the following comparison simulation analysis to investigate the cause of the above fringes, thereby fundamentally solving the problems.

Comparison simulation 1: the laser spot shown in fig. 1(a) is scattered by using a scattering sheet to obtain a scattered spot as shown in fig. 2(a), the spot size is obviously increased as seen from fig. 2(a), the angular distribution of the corresponding square bar outlet is shown in fig. 2(b), a 3D picture appears as shown in fig. 2(c), the angular distribution of the light beam shown in fig. 2(b) is more continuous compared with fig. 1(b) and fig. 1(c), and the stripes of the picture shown in fig. 2(c) are obviously weakened.

Comparison simulation 2: the skilled person designs the light spot at the entrance of the square bar as the light spot shown in fig. 3(a), so that the light spot is relatively large at the short side of the square bar, but relatively small at the long side of the square bar, in this case, the angular distribution of the light beam shown in fig. 3(b) can be measured, and it can be seen from fig. 3(b) that the angular distribution of the light beam at the exit of the square bar is relatively continuous, and the picture stripe on the finally presented 3D picture is not obvious as shown in fig. 3 (c).

Comparison simulation 3: in contrast, the technician also designs the light spot at the entrance of the square bar as the light spot shown in fig. 4(a), so that the light spot is smaller at the short side of the square bar and larger at the long side of the square bar; the angular distribution of the light beam shown in fig. 4(b) is measured, and it can be seen from fig. 4(b) that the angular distribution of the light beam at the exit of the square bar is continuous as compared with fig. 1(b), but is not continuous as compared with fig. 2(b), so that the picture stripes on the finally presented 3D picture are obvious stripes as shown in fig. 4 (c).

As can be seen from the comparison simulations 1-3 and the analysis of the results obtained from the comparison simulations 1-3, for laser, fluorescent or Light Emitting Diode (LED), when the Light spot is not fully filled in the short side direction of the square bar inlet, the angular distribution of the Light beam at the square bar outlet is not continuous, resulting in the occurrence of stripes on the picture.

When the dodging system adopts the compound eye to dodge light, the principle is similar to that of the square rod described above, and if the surface distribution of the light beam is discontinuous when the light beam is emitted from the compound eye, the image has a stripe phenomenon.

However, the above technical problems are not found by the prior art and the skilled in the art, and meanwhile, in the design of the conventional projection system, in order to ensure the exit uniformity of the optical machine and improve the coupling efficiency when the light source is butted with the optical machine, the skilled person often corresponds the direction in which the etendue of the laser is smaller (i.e. the fast axis direction) to the direction in which the etendue of the optical homogenizing device is smaller, and corresponds the direction in which the etendue of the laser is larger (i.e. the slow axis direction) to the direction in which the etendue of the optical homogenizing device is larger. The optical expansion amount of the laser in the fast axis direction is smaller, so that the situation of discontinuous angular distribution appears after the light beam enters the optical-mechanical system, and the technical problem that the picture has stripes is difficult to solve.

In order to overcome the technical bias of the technicians in the field and solve the problem that the display picture has stripes after 3D equipment is added into a projection system, the application provides a scheme for improving the angular distribution continuity of the light beam emitted by the dodging system, the traditional optical expansion matching mode is not adopted, the light beam expansion amount emitted by the first light-emitting component is controlled, the direction with smaller optical expansion amount (namely the fast axis direction) of the light beam corresponds to the direction with larger optical expansion amount of the dodging system, and the direction with larger optical expansion amount (namely the slow axis direction) of the light beam corresponds to the direction with larger optical expansion amount of the dodging system; so that the size of the light spot of the light beam incident to the dodging system is increased, the filling rate of the light beam incident to the dodging system on the short side of the dodging system is improved, the filling rate is the ratio of the length of the light spot on the short side of the dodging system to the width of the dodging system, when the filling rate is larger than the preset threshold value, the angular distribution of the light beam at the outlet of the dodging system is judged to be continuous, the application provides that the filling rate of the light beam entering the dodging system at the short side of the dodging system is adjusted, so that the angular distribution/surface distribution of the light beam entering the dodging system is more continuous, the greater the filling rate of the short side of the dodging system is, the more continuous the angular distribution of the light beam emitted from the dodging system is, so that the continuity of the angular distribution/surface distribution of the light beam emitted from the dodging system can be improved, and the problem that stripes appear on a display picture is solved.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a light source system according to a first embodiment of the present application, the light source system including: a first light emitting assembly 11 and a light homogenizing system 12.

In this embodiment, the first light emitting assembly 11 includes a first laser light source 111, and the first laser light source 111 generates a first laser beam, wherein a fast axis direction of the first laser beam emitted by the first laser light source 111 corresponds to a first direction of the dodging system 12, a slow axis direction of the first laser beam emitted by the first laser light source 111 corresponds to a second direction of the dodging system 12, the first laser beam emitted by the first laser light source 111 forms the first laser beam, and the first laser light source 111 may be a laser; specifically, the first laser beam is any one or more of a red laser beam, a green laser beam, and a blue laser beam, that is, the first laser light source 111 is any one or more of a red laser, a green laser, and a blue laser, the red laser is configured to generate the red laser beam, the green laser is configured to generate the green laser beam, and the blue laser is configured to generate the blue laser beam.

The dodging system 12 is disposed on an emitting light path of the first laser light source 111, and is configured to receive the first light beam; specifically, the light source of the present embodiment is disposed in such a way that the fast axis direction of the first light beam emitted therefrom corresponds to the first direction of the dodging system 12, the slow axis direction of the first light beam corresponds to the second direction of the dodging system 12, the first direction is a direction in which the etendue of the dodging system 12 is greater than the preset etendue, that is, a direction in which the short side of the dodging system 12 is located, and the second direction is a direction in which the etendue of the dodging system 12 is less than or equal to the preset etendue.

In a specific embodiment, please refer to fig. 6, fig. 6 is a schematic structural diagram of a second embodiment of the light source system provided in the present application, and the light source system further includes: a second light emitting element 13 and a first light guiding element 14.

The second light-emitting component 13 is used for generating a second light beam, and the etendue of the second light beam is larger than that of the first light beam; the second light emitting component 13 may be a laser fluorescence light source device or an LED, that is, the second light beam may be a fluorescence light beam or a light beam generated by an LED, and the light beam generating device in the light source system may be a light source device in which fluorescence and laser are mixed, or it may be a light source device in which LED light and laser are mixed.

The first light guiding element 14 is disposed on the light path of the first light beam and the second light beam, and is used for transmitting the first light beam to the light homogenizing system 12 and reflecting the second light beam to the light homogenizing system 12, the first light guiding element 14 may be an area film or a dichroic sheet, for example, as shown in fig. 8, the area film includes a central area 141 and edge areas 142 disposed at two sides of the central area 141, the central area 141 may transmit light beams in red, green, or blue bands, and the edge areas 142 may reflect light beams in red or green bands.

With continued reference to fig. 6, the light source system further includes: a focusing lens 15 and a converging lens 16.

The focusing lens 15 is disposed on an exit light path of the first light emitting assembly 11, and is configured to focus the first light beam.

The converging lens 16 is disposed on the optical path of the second light beam, and is used for converging the second light beam emitted from the second light emitting assembly 13.

In one embodiment, as shown in fig. 6, the second light emitting assembly 13 includes: an excitation light source 131, a wavelength conversion device 132, a second light directing component 133, and a collection lens 134.

The excitation light source 131 is used to generate an excitation light beam, and the excitation light source 131 may be a blue laser, i.e., the excitation light beam may be a blue laser beam.

The wavelength conversion device 132 is disposed on the optical path of the excitation light beam, and is configured to receive the excitation light beam and generate a fluorescence light beam; specifically, the wavelength conversion device 132 may be coated with a phosphor powder, which may be excited by a blue laser beam to generate a fluorescent light beam, which may be yellow in color.

The collecting lens 134 is disposed on the optical path of the excitation light beam and the fluorescence light beam, and is used for collecting the excitation light beam and the fluorescence light beam.

The second light guiding assembly 133 is disposed on the optical path of the excitation light beam and the fluorescence light beam, and is configured to reflect the excitation light beam to the wavelength conversion device 132 and transmit the fluorescence light beam to the converging lens 16; specifically, the second light guiding component 133 may be a blue-reflective and yellow-transmissive area film or a dichroic film, that is, the second light guiding component 133 may reflect the blue light beam and transmit the yellow light beam, the excitation light beam is reflected by the second light guiding component 133 to the collecting lens 134, and is incident to the wavelength conversion device 132 through the collecting lens 134 to excite the wavelength conversion device 132 to generate the fluorescence light beam.

Further, the dodging system 12 includes: a relay lens 121 and a square rod 122.

The relay lens 121 is disposed on the optical paths of the first light beam and the second light beam, and is configured to converge the first light beam emitted from the first light guiding assembly 14 and the second light beam emitted from the converging lens 16; specifically, the first light beam enters the relay lens 121 through the focusing lens 15 and the first light guiding assembly 14.

The square bar 122 is disposed on the light emitting path of the relay lens 121, and is used for homogenizing the light beam emitted by the relay lens 121; specifically, the first direction is a direction in which a short side of the square bar 122 is located, the second direction is a direction in which a long side of the square bar 122 is located, that is, a fast axis direction of the first light beam corresponds to the short side direction of the square bar 122, and a slow axis direction of the first light beam corresponds to the long side direction of the square bar 122.

The working principle of the light source system is as follows: the first laser light source 111 generates a first laser beam, and the first laser beam is made to serve as a first beam by changing the placement mode of the first laser light source 111, and the fast axis direction of the first beam corresponds to the first direction of the dodging system 12, and the slow axis direction of the first beam corresponds to the second direction of the dodging system 12. The first light beam is converged on the first light guiding member 14 by the focusing lens 15, transmitted to the relay lens 121 by the central region of the first light guiding member 14; meanwhile, a blue laser beam generated by the blue laser is reflected by the edge region of the second light guiding component 133 to the collecting lens 134, and is incident on the phosphor through the collecting lens 134, so that the phosphor is excited to generate a fluorescent light beam, the fluorescent light beam enters the central region of the second light guiding component 133 through the collecting lens 134, is transmitted to the converging lens 16 by the central region of the second light guiding component 133, then enters the edge region of the first light guiding component 14 through the converging lens 16, and is reflected by the edge region of the first light guiding component 14 to the relay lens 121; after the laser beam is combined with the fluorescent beam, the combined beam may be converged or collimated by the relay lens 121 to enter the square rod 122.

In other embodiments, as shown in fig. 7, the wavelength conversion device 132 may also be a transmissive device, which can receive the light beam emitted from the excitation light source 131 to generate a fluorescent light beam, and transmit the fluorescent light beam to the first light guiding assembly 14, and the following operation principle is the same as that of the embodiment shown in fig. 6, and is not repeated herein.

It is to be understood that the second light emitting assembly 13 is not limited to the scheme of laser beam excitation to generate fluorescence, and the second light emitting assembly 13 may also use an LED as a light source.

Since the direction in which the etendue of the first light beam emitted by the first laser light source 111 is large corresponds to the direction in which the etendue of the square rod 122 is small, that is, the angle at which the laser beam in the slow axis direction, in which the etendue of the first light beam emitted by the first light emitting assembly 11 is large, enters the focusing lens 15 is large, when the etendue of the first light emitting assembly 11 in the slow axis direction is large, it is not necessary to add other optical devices, the laser spot size on the first light guiding assembly 14 can be increased, and the filling ratio of the short side of the square rod 122 is increased.

In another specific embodiment, the first light emitting assembly 11 includes a second laser light source and an angle distribution control element (not shown in the figure), the second laser light source is used for emitting a second laser beam, and the angle distribution control element is disposed on an outgoing light path of the second laser light source and is used for increasing a divergence angle of the second laser beam in the fast axis direction and generating the first beam, so that a filling rate of a spot of the first beam incident to the light homogenizing system 12 in the first direction is increased, thereby increasing continuity of the angle distribution of the first beam incident to the light homogenizing system 12 and solving a problem that a display screen has stripes.

That is, in addition to the way of directly controlling the etendue of the first light-emitting assembly 11, the etendue of the first light beam incident on the dodging system 12 may be adjusted by using an angular distribution control element instead of adjusting the etendue of the second laser light source, please refer to fig. 9, where fig. 9 is a schematic structural diagram of a fourth embodiment of the light source system provided in the present application, and the light source system includes: a second laser light source 112, an angular distribution control element 113, and a dodging system 12.

The second laser light source 112 is used for generating a second laser beam, which is any one or more of a red laser beam, a green laser beam, and a blue laser beam.

The angular distribution control element 113 is disposed on the light-emitting path of the second laser light source 112, and is configured to adjust the light-emitting direction of the second laser beam to generate the first laser beam.

The dodging system 12 is disposed on an outgoing light path of the angular distribution control element 113, and is configured to dodge the first light beam outgoing from the angular distribution control element 113; the fast axis direction of the first light beam corresponds to the first direction of the dodging system 12, the slow axis direction of the first light beam corresponds to the second direction of the dodging system 12, the first direction is a direction in which the etendue of the dodging system 12 is greater than the preset etendue, and the second direction is a direction in which the etendue of the dodging system 12 is less than or equal to the preset etendue.

It is understood that the light source system provided in this embodiment, in addition to the second laser light source 112, the angular distribution control element 113 and the dodging system 12, may further include an optical device in the embodiment shown in fig. 6, and the operation principle thereof is similar to that of the embodiment shown in fig. 6, and is not described herein again. The angular distribution control element of the embodiment shown in fig. 1 and 9 will now be described.

In an embodiment, the angular distribution control element is a cylindrical microlens array or a cylindrical fly eye, please refer to fig. 10, fig. 10 is a schematic structural diagram of a fifth embodiment of the light source system provided in the present application, and the embodiment takes the angular distribution control element as the cylindrical microlens array 1131, the first light guiding assembly 14 and the second light guiding assembly 133 as the area membranes, and the wavelength conversion device 132 as the phosphor as an example for description.

The filling rate of the light spot of the first light beam incident on the light equalizing system 12 in the first direction can be adjusted to be greater than the preset threshold value by adjusting a parameter of the cylindrical microlens array 1131, where the parameter may be a focal length of the cylindrical microlens array 1131, a number, a density, an arrangement manner of the cylindrical microlenses, and the like. The second laser beam is incident on the focusing lens 15 after the angle of the second laser beam is expanded by the cylindrical micro-lens array 1131, and the focusing lens 15 converges the laser beam on the area diaphragm 14; the excitation light source 131 can emit 455nm blue laser beams, the blue laser beams are reflected by the area diaphragm 133 after being incident on the area diaphragm 133, and are converged on the fluorescent powder 132 by the collecting lens 134, fluorescent light beams generated by the fluorescent powder 132 after being excited are collected by the collecting lens 134 and then enter the converging lens 16, and are converged on the area diaphragm 14 by the converging lens 16, and the laser beams and the fluorescent light beams are converged on the area diaphragm 14 and then enter the square rod 122 through the relay lens 121.

According to the scheme, the filling rate of laser spots on the short side of the square rod 122 is increased by replacing the matching mode of the optical expansion amount, so that the angular distribution of light beams at the outlet of the square rod 122 is more continuous; in addition to the expanded etendue matching method, the cylindrical microlens array 1131 is used to increase the divergence angle in the direction in which the etendue of the light beam is small, and the relationship between the spot height and the divergence angle is as follows:

h＝f×tan(θ)

where f is the focal length of the focusing lens 15, θ is the divergence angle, and h is the spot height.

The formula shows that: as the divergence angle increases, the height of the spot converging onto the area membrane 14 also increases, thereby increasing the fill rate of the laser spot on the short side of the square bar 122, and as the fill rate of the spot on the short side of the entrance of the square bar 122 is higher, the angular distribution of the beam at the exit of the square bar 122 is more continuous.

The scheme combines an optical expansion matching scheme and a cylindrical micro-lens scheme to improve the filling rate of the laser spots on the short side of the square rod 122, when the filling rate of the laser spots on the short side of the square rod 122 reaches at least 70%, the angular distribution of the light beams at the outlet of the square rod 122 is continuous, at the moment, the image stripes caused by the thin seams among the light splitting sheets of the 3D equipment are weak, and it can be considered that when the filling rate of the short side of the square rod 122 reaches at least 70%, the stripes perceived by human eyes are not obvious, and the viewing effect is not influenced. It can be understood that the present embodiment is not limited to the etendue matching scheme and the cylindrical microlens scheme to achieve a filling rate of the short side of the square bar 122 of 70%, and in the case of the etendue matching scheme, only the cylindrical microlens array 1131 may be used, and by adjusting parameters of the cylindrical microlens array 1131, a filling rate of the short side of the square bar 122 of at least 70% may also be achieved.

In another embodiment, please refer to fig. 11, fig. 11 is a schematic structural diagram of a sixth embodiment of the light source system provided in the present application, an angular distribution control element is a scattering sheet 1132, the scattering sheet 1132 may be an elliptical gaussian scattering sheet, a two-dimensional anisotropic diffusion sheet or other types of scattering sheets, as long as the angular distribution of the light beam can be controlled, the matching manner of the optical expansion amount of the laser beam and the dodging system 12 in the present embodiment is the same as that in the second embodiment, the fast axis direction of the laser beam corresponds to the short side direction of the square bar 122, and the slow axis direction of the laser beam corresponds to the long side direction of the square bar 122, and the working principle of the light source system is similar to that in the second embodiment, and will not be described herein again.

In this embodiment, the angle of the light beam is enlarged by using the scattering patch 1132, a direction in which the scattering angle of the scattering patch 1132 is greater than a preset scattering angle is a first direction of the scattering patch 1132, the first direction of the scattering patch 1132 corresponds to a slow axis direction, a direction in which the scattering angle of the scattering patch 1132 is less than or equal to the preset scattering angle is a second direction of the scattering patch 1132, and the second direction corresponds to a fast axis direction, that is, a direction in which the scattering angle of the scattering patch 1132 is larger corresponds to a direction in which the optical expansion amount of the second laser light beam is larger, and a direction in which the scattering angle of the scattering patch 1132 is smaller corresponds to a direction in which the optical expansion amount of the second laser light beam is smaller; the second laser beam enlarges the beam angle through the diffusion piece 1132, which not only can increase the spot size of the second laser beam on the area diaphragm 14 in the direction of smaller optical expansion, but also can increase the filling rate of the short side of the square bar 122, and improve the uniformity of the beam at the outlet of the square bar 122 by enlarging the filling rate of the second laser beam on the long side of the square bar 122.

In another embodiment, please refer to fig. 12, where fig. 12 is a schematic structural diagram of a seventh embodiment of the light source system provided in the present application, an angular distribution control element is a scattering sheet 1133, and the scattering sheet 1133 may be a gaussian scattering sheet, a two-dimensional anisotropic diffusion sheet, or other types of scattering sheets, in this embodiment, the scattering sheet 1133 is a common scattering sheet and only performs a scattering function, but does not change the angular distribution of the second laser beam in each direction differently, in this embodiment, an included angle between the scattering sheet 1133 and the horizontal direction is set to be a preset angle, which is 0 to 90 degrees, so that the angular distribution of the second laser beam in each direction is controlled differently, and the working principle of the light source system is similar to that of the second embodiment, and is not repeated here.

It is worth mentioning that although the scattering angle of the ordinary scattering sheet 1133 in each direction is the same, when the scattering sheet 1133 is placed in a manner of forming an included angle with the horizontal direction, the larger the inclination angle of the scattering sheet 1133 is, the larger the scattering angle is, the scattering angle of the scattering sheet 1133 in a certain direction is increased by the oblique placement manner, and the function of the scattering sheet is the same as that of an elliptical scattering sheet.

The plane that the incline direction of diffuser 1133 is located in this scheme is the plane that the minor face of square rod 122 is located, and after diffuser 1133 inclined put, the light beam angle that the minor face of square rod 122 corresponds is got bigger by the scattering, makes the laser facula of the minor face of formation of image square rod 122 bigger, improves the filling rate of the minor face of square rod 122, can solve the problem that 3D equipment appears the stripe.

In another embodiment, referring to fig. 13, fig. 13 is a schematic structural diagram of an eighth embodiment of a light source system provided in the present application, and the angular distribution control element 1134 includes: a first cylindrical mirror 1134a and a second cylindrical mirror 1134 b.

The first cylindrical mirror 1134a is disposed on an exit light path of the second laser light source 112, and is configured to converge the second laser light beam in the fast axis direction; the second cylindrical mirror 1134b is disposed on an exit light path of the first cylindrical mirror 1134a, is perpendicular to the first cylindrical mirror 1134a, and is configured to converge the second laser beam in the slow axis direction to obtain a first beam; the working principle of the light source system is similar to that of the second embodiment, and is not described herein again.

The first cylindrical mirror 1134a and the second cylindrical mirror 1134b both only act on one direction of the second laser beam, and beam propagation in the other direction is not affected, and the spot size of the beam on the area diaphragm 14 can be adjusted by adjusting the focal lengths of the first cylindrical mirror 1134a and the second cylindrical mirror 1134b, so that the filling rate of the second laser beam on the short side of the square bar 122 is increased, and the problem that stripes appear in the display of the 3D device is solved.

In another embodiment, a compound eye can be used as the light uniformizing device, that is, referring to fig. 14, fig. 14 is a schematic structural diagram of a ninth embodiment of the light source system provided in the present application, and the light uniformizing system 22 includes: a collimating lens 221 and a homogenizing fly eye 222.

The collimating lens 221 is disposed on the optical paths of the first light beam and the second light beam, and is configured to collimate the first light beam emitted from the first light guiding assembly 14 and the second light beam emitted from the converging lens 16; the dodging fly eye 222 is disposed on the optical path of the collimating lens 221, and is configured to dodge the light beam emitted by the collimating lens 221; the first light beam and the fluorescent light beam are combined at the area diaphragm 14, collimated by the collimating lens 221, and finally enter the light equalizing fly eye 222 for light equalizing.

In the system including the fly eye 222, the main reason why the stripe is generated is that the angle is smaller when the laser beam is incident to the fly eye 222 than the short side angle of the fly eye 222 (i.e., the direction in which the angle of the fly eye 222 is smaller), and when the divergence angle of the laser beam/the short side angle of the fly eye 222 is < 70%, if a 3D device is added, the picture will appear as a distinct stripe. Similar to the dodging by using a square rod, the spot size of the laser beam on the surface of the area diaphragm 14 is increased, so that the surface distribution of the light beam collimated by the collimating lens 221 is more continuous, the spot size on the area diaphragm 14 can be increased by using the cylindrical micro-lens array 17, the collimation clearance angle of the light beam passing through the collimating lens 221 is increased, namely the angle filling rate of the incident dodging compound eye 222 is increased, and the stripes of the 3D device during displaying are eliminated. It is understood that the solutions of the third to seventh embodiments are equally applicable to the dodging device being the dodging compound eye 222.

Referring to fig. 15, fig. 15 is a schematic structural diagram of an embodiment of a projection system provided in the present application, the projection system includes a 3D device 30 and a light source system 10, the light source system 10 is used for generating an illumination beam, and is the light source system in the above embodiment; the 3D device 30 is arranged in the optical path of the source light beam for projection display based on the illumination light beam.

In a projection system, after a 3D device is added, the reason for the streaking of the picture is the discontinuity of the angular distribution of the pure laser light exiting from the dodging system. In order to solve the problem of stripes, the scheme for eliminating the stripes generated by the three-optical-path 3D equipment is provided, the arrangement mode of a first laser light source is controlled to change optical expansion matching or a second laser light source is controlled to generate a laser beam, the angle of the laser beam can be enlarged in a cylindrical micro-lens array mode, an elliptical Gaussian scattering sheet mode, an obliquely arranged Gaussian scattering sheet mode, a cylindrical mirror mode and the like, and then the laser beam is converged on a regional membrane through a focusing lens, so that a focused light spot at the regional membrane is larger, the filling rate of the laser beam on the short side of a square rod or the filling rate of the laser beam entering a light homogenizing fly eye are increased, the angular distribution of the laser beam emitted from the square rod or the light homogenizing fly eye is more continuous, and the problem of the stripes generated by the 3D equipment is solved.

The above embodiments are merely examples, and not intended to limit the scope of the present application, and all modifications, equivalents, and flow charts using the contents of the specification and drawings of the present application, or those directly or indirectly applied to other related arts, are included in the scope of the present application.

Claims

1. A light source system, characterized in that, comprising:

a first light-emitting component for generating a first light beam;

a homogenizing system, arranged on the outgoing light path of the first light-emitting component, and used for homogenizing the first light beam;

Wherein, the fast axis direction of the first light beam corresponds to the first direction of the uniform light system, the slow axis direction of the first light beam corresponds to the second direction of the uniform light system, and the first direction is The etendue of the uniform light system is greater than the direction in which the preset etendue is greater, and the second direction is the direction in which the etendue of the uniform light system is less than or equal to the preset etendue.

2. The light source system according to claim 1, wherein the first light-emitting component comprises:

a first laser light source for generating a first laser beam;

Wherein, the fast axis direction of the first laser beam emitted by the first laser light source corresponds to the first direction of the uniform light system, and the slow axis direction of the first laser beam emitted by the first laser light source Corresponding to the second direction of the optical system, the first laser beam emitted by the first laser light source constitutes the first beam, and the light output mode of the first laser light source is such that the first laser beam incident on the uniform light system The fill factor of the spot of the light beam in the first direction is increased.

3. The light source system according to claim 1, wherein the first light-emitting component comprises:

a second laser light source, the second laser light source is used to emit a second laser beam;

An angular distribution control element, arranged on the outgoing light path of the second laser light source, is used to adjust the light outgoing direction of the second laser beam and generate the first beam, so as to make the light incident on the uniform light system The fill factor of the spot of the first light beam in the first direction is increased.

4. The light source system according to claim 2 or 3, characterized in that,

The first direction is the direction in which the short side of the uniform light system is located, and the filling rate is the ratio between the length of the light spot on the short side and the width of the uniform light system; when the filling rate is greater than When the threshold is preset, the angular distribution of the light beam at the exit of the uniform light system is continuous.

5. The light source system according to claim 3, wherein,

The angular distribution control element is a cylindrical microlens array or a cylindrical compound eye.

6. The light source system according to claim 5, wherein,

The filling rate of the light spot of the light beam incident on the uniform light system in the first direction is greater than a preset threshold.

7. The light source system according to claim 3, wherein,

The angle distribution control element is a scattering sheet, and the direction of the scattering angle of the scattering sheet greater than the preset scattering angle is the first direction of the scattering sheet, and the first direction of the scattering sheet corresponds to the slow axis direction, The direction in which the scattering angle of the scattering sheet is smaller than or equal to the predetermined scattering angle is the second direction of the scattering sheet, and the second direction of the scattering sheet corresponds to the fast axis direction.

8. The light source system according to claim 3, wherein,

The angle distribution control element is a diffusion sheet, and the included angle between the diffusion sheet and the horizontal direction is a preset angle, wherein the preset angle is 0-90°.

9. The light source system according to claim 3, wherein the angular distribution control element comprises:

a first cylindrical mirror, disposed on the outgoing light path of the first light-emitting component, and used for converging the first light beam in the direction of the fast axis;

The second cylindrical mirror is arranged on the outgoing light path of the first cylindrical mirror, and is vertically arranged with the first cylindrical mirror, and is used for condensing the first light beam in the slow axis direction.

10. The light source system according to claim 1, wherein the light source system further comprises:

a second light-emitting component for generating a second light beam, the second light-emitting component adopts a laser-excited fluorescent device or an LED device, wherein the etendue of the second light beam is greater than the etendue of the first light beam;

a first light guide assembly, disposed on the optical path of the first light beam and the second light beam, for transmitting the first light beam to the uniform light system, and reflecting the second light beam to the Lighting system.

11 . The light source system according to claim 1 , wherein the homogenizing system is a square rod or a homogenizing compound eye. 12 .

12. A projection system, characterized in that it comprises a 3D device and the light source system according to any one of claims 1-11, wherein the light source system is used to generate an illumination beam, and the 3D device is arranged at the position of the light source beam. On the light path, it is used for projection display based on the illumination of the light source.