Light source modules and projection equipment

Abstract

The present invention discloses a light source module and a projection device, in which a first light beam portion emitted by a first light source serves as a first light-emitting light beam, and another portion serves as an initiating light beam, and the initiating light beam can be converted by a second light source into a second light-emitting light beam. The closer the first dichroic mirror is to the second dichroic mirror, the larger the reflection area of ​​the first light beam, that is, the more initiating light beams, the more second light-emitting light beams, and the less first light-emitting light beams; the farther the first dichroic mirror is from the second dichroic mirror, the more first light-emitting light beams, and the less second light-emitting light beams. Therefore, by adjusting the relative position of the first dichroic mirror, the ratio of the first light-emitting light beam and the second light-emitting light beam can be effectively adjusted; thus, the user or the projection device itself can improve the color temperature deviation and brightness of the projected image by adjusting the ratio of the first light-emitting light beam and the second light-emitting light beam, so as to improve the projection effect of the projection device.

Description

Technical Field

[0001] The present invention relates to the technical field of projection equipment, and in particular to a light source module and a projection equipment. Background Art

[0002] Projection equipment can project images or videos onto a screen. By combining three primary colors of light with projection display technology, it can produce a richly colored image. However, the brightness ratio between the three primary colors of light in the projection device's optical engine is not adjustable; it is set at the factory. If the luminous efficiency of one of the light sources decreases due to aging or other factors, the projected image will exhibit color temperature deviations, decreased brightness, and other issues that cannot be effectively addressed, affecting the projection effect. Summary of the Invention

[0003] The main purpose of the present invention is to provide a light source module, aiming to solve the technical problem of how to adjust the brightness ratio of three-color light sources.

[0004] To achieve the above objectives, the light source module proposed in the present invention includes:

[0005] a first light source, configured to emit a first light beam;

[0006] a first dichroic mirror, obliquely opposite to the first light source, the first dichroic mirror being configured to reflect a portion of the first light beam, the first light beam being divided into an initiating light beam reflected by the first dichroic mirror and a first outgoing light beam that is not reflected;

[0007] a second light source, obliquely opposed to the first dichroic mirror, to receive the initiating light beam reflected by the first dichroic mirror; the second light source is provided with a first wavelength conversion layer, the first wavelength conversion layer being configured to convert the initiating light beam into a second output light beam;

[0008] a second dichroic mirror disposed between the first dichroic mirror and the second light source, the second dichroic mirror configured to transmit at least a portion of the first outgoing light beam and reflect the second outgoing light beam in a direction in which the first outgoing light beam transmits the second dichroic mirror;

[0009] The first driving element is used to drive the first dichroic mirror to move closer to or away from the second dichroic mirror, so as to increase or decrease the reflection area of ​​the first light beam.

[0010] Optionally, the light source module further includes a third light source for emitting a third light beam; the third light source is arranged on a side of the first dichroic mirror away from the second dichroic mirror; the first dichroic mirror is further used to reflect the third light beam toward the direction of light emission of the first light source.

[0011] Optionally, the light source module further includes a fourth light source and a third dichroic mirror, the fourth light source is used to emit a fourth light beam; the light emitting direction of the fourth light source is opposite to that of the second light source;

[0012] The third dichroic mirror is arranged on a side of the first dichroic mirror away from the first light source and is obliquely opposite to the fourth light source; the third dichroic mirror is used to transmit the first outgoing light beam and the third outgoing light beam, and reflect the fourth outgoing light beam in the direction in which the third outgoing light beam transmits the third dichroic mirror.

[0013] Optionally, the light source module further includes a fourth light source and a third dichroic mirror, the fourth light source is used to emit a fourth light beam; the light emitting direction of the fourth light source is opposite to that of the third light source;

[0014] The third dichroic mirror is arranged on a side of the second dichroic mirror away from the first light source and is obliquely opposite to the fourth light source; the third dichroic mirror is used to transmit the first and second outgoing light beams, and reflect the fourth outgoing light beam toward the direction in which the second outgoing light beam transmits the third dichroic mirror.

[0015] Optionally, the light source module further includes a fourth dichroic mirror and a fifth light source, wherein the fourth dichroic mirror is disposed on a side of the first dichroic mirror and the second dichroic mirror facing away from the first light source; the fifth light source is obliquely opposed to the fourth dichroic mirror and is configured to emit a fifth light beam, the color of the fifth light beam being different from the color of the first light beam and the second light beam;

[0016] The fourth dichroic mirror is used to transmit the first outgoing light beam and the second outgoing light beam, and reflect the fifth outgoing light beam in the direction in which the first outgoing light beam transmits the fourth dichroic mirror.

[0017] Optionally, the light source module further includes a sixth light source, a fifth dichroic mirror and a sixth dichroic mirror;

[0018] The fifth dichroic mirror is disposed on a side of the second dichroic mirror away from the first light source and is used to reflect a portion of the first outgoing light beam and transmit the second outgoing light beam; the first outgoing light beam is divided into an inducing sub-beam reflected by the fifth dichroic mirror and an outgoing light sub-beam not reflected;

[0019] The sixth light source is arranged obliquely opposite to the fifth dichroic mirror to receive the inducing sub-beam reflected by the fifth dichroic mirror; the sixth light source is provided with a second wavelength conversion layer for converting the inducing sub-beam into a sixth output light beam;

[0020] The sixth dichroic mirror is provided between the fifth dichroic mirror and the sixth light source, and is used to transmit the inducing sub-beam and reflect the sixth outgoing light beam in the direction in which the outgoing light beam transmits the sixth dichroic mirror;

[0021] In a direction perpendicular to the light emission direction of the first light source, a gap is formed between the first dichroic mirror and the fifth dichroic mirror to form a light output channel, and the light output channel is used for the output sub-beam to pass through.

[0022] Optionally, the fifth dichroic mirror is parallel to the second dichroic mirror; the sixth dichroic mirror is parallel to the first dichroic mirror; and the first dichroic mirror and the second dichroic mirror are perpendicular to each other.

[0023] Optionally, the light source module further includes a second driving component, and the second driving component is used to drive the fifth dichroic mirror to move closer to or away from the sixth dichroic mirror, so as to increase or decrease the reflection area of ​​the first output light beam.

[0024] Optionally, the light source module further includes a collimating lens and / or a homogenizing lens, and the collimating lens and / or the homogenizing lens are arranged on the light output paths of the first light beam and the second light beam.

[0025] The present invention also proposes a projection device, including a light source module, which includes: a first light source, the first light source is used to emit a first light beam; a first dichroic mirror, obliquely opposite to the first light source, the first dichroic mirror is used to reflect part of the first light beam, and the first light beam is divided into an initiating light beam reflected by the first dichroic mirror and a first light-emitting light beam that is not reflected; a second light source, obliquely opposite to the first dichroic mirror, to receive the initiating light beam reflected by the first dichroic mirror; the second light source is provided with a first wavelength conversion layer, the first wavelength conversion layer is used to convert the initiating light beam into a second light-emitting light beam; a second dichroic mirror, provided between the first dichroic mirror and the second light source, the second dichroic mirror is used to transmit at least part of the first light-emitting light beam and reflect the second light-emitting light beam in the direction in which the first light-emitting light beam transmits the second dichroic mirror; a first driving member, used to drive the first dichroic mirror closer to or away from the second dichroic mirror, so as to increase or decrease the reflection area of ​​the first light beam.

[0026] In the technical solution of the light source module of the present invention, part of the first light beam emitted by the first light source serves as the first light-emitting beam, and the other part serves as the triggering beam. The triggering beam can be converted by the second light source into the second light-emitting beam. It can be understood that the more triggering beams there are, the more second light-emitting beams there are, but the first light-emitting beam is correspondingly reduced, that is, the first light-emitting beam and the second light-emitting beam are negatively correlated. The closer the first dichroic mirror is to the second dichroic mirror, the larger the reflection area of ​​the first light beam, that is, the more triggering beams there are, the more second light-emitting beams there are, and the first light-emitting beam is reduced. Therefore, by adjusting the relative position of the first dichroic mirror, the ratio of the first light-emitting beam to the second light-emitting beam can be effectively adjusted. Thus, the user or the projection device itself can improve the color temperature deviation and brightness of the projected image by adjusting the ratio of the first light-emitting beam to the second light-emitting beam, so as to improve the projection effect of the projection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0028] Figure 1 This is a structural diagram of an embodiment of a light source module of the present invention;

[0029] Figure 2 Schematic diagram of the structure of the first dichroic mirror in different positions in the present invention;

[0030] Figure 3 This is a structural diagram of another embodiment of the light source module of the present invention;

[0031] Figure 4 This is a structural diagram of another embodiment of the light source module of the present invention;

[0032] Figure 5 This is a structural diagram of another embodiment of a light source module of the present invention;

[0033] Figure 6 This is a structural diagram of another embodiment of the light source module of the present invention;

[0034] Figure 7 Schematic diagram of the structure of the fifth dichroic mirror in different positions in the present invention.

[0035] Description of Figure Numbers:

[0036] Label name Label name Label name 110 First light source 210 First dichroic mirror 120 Second light source 121 First wavelength conversion layer 220 Second dichroic mirror 130 The third light source 140 Fourth light source 230 Third dichroic mirror 240 Fourth dichroic mirror 150 Fifth Light Source 160 The sixth light source 250 Fifth dichroic mirror 260 Sixth dichroic mirror 310 Collimating lens 320 Homogenizing lens 410 light box 420 light area 161 Second wavelength conversion layer

[0037] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] A projector is a device that projects images or videos onto a screen or wall covering. It can be connected to computers, mobile phones, DVD players, game consoles, and other electronic devices through various interfaces to play the corresponding video signals. The main functional component of a projector is the optical engine, which projects the image by mixing three primary colors of light. The brightness ratio between the three primary colors in the projector's optical engine cannot be adjusted; it is determined at the factory. If the luminous efficiency of one of the light sources decreases due to aging or other reasons, the projected image will exhibit color temperature deviation, decreased brightness, and other problems that cannot be effectively resolved, affecting the projection effect.

[0042] In order to solve the above problems, the present invention proposes a light source module. In an embodiment of the present invention, Figure 1 and Figure 2 As shown, Figure 1 This is a structural diagram of an embodiment of a light source module of the present invention; Figure 2 Schematic diagrams of the structure of the first dichroic mirror 210 at different positions in the present invention.

[0043] The light source module includes: a first light source 110, the first light source 110 is used to emit a first light beam; a first dichroic mirror 210, which is tilted opposite to the first light source 110 and is used to reflect a portion of the first light beam, wherein the first light beam is divided into an initiating light beam reflected by the first dichroic mirror 210 and a first light-emitting light beam that is not reflected; a second light source 120, which is tilted opposite to the first dichroic mirror 210 and receives the initiating light beam reflected by the first dichroic mirror 210; the second light source 120 is provided with a first wavelength conversion layer 121, The first wavelength conversion layer 121 is used to convert the initiating light beam into a second output light beam; the second dichroic mirror 220 is arranged between the first dichroic mirror 210 and the second light source 120, and the second dichroic mirror 220 is used to transmit at least a portion of the first output light beam and reflect the second output light beam in the direction in which the first output light beam transmits the second dichroic mirror 220; a first driving member (not shown) is used to drive the first dichroic mirror 210 to move closer to or away from the second dichroic mirror 220 to increase or decrease the reflection area of ​​the first light beam.

[0044] In this embodiment, the projection device further includes a light box 410, in which the light source module is installed. The first light source 110 and the second light source 120 can be laser light sources or LED light sources, without limitation. The first dichroic mirror 210 is tilted relative to the light-emitting surfaces of the first light source 110 and the second light source 120. A dichroic mirror can reflect light of a specific wavelength and transmit light of a specific wavelength. For the first dichroic mirror 210, the wavelength of the first light beam is within the reflection wavelength range of the first dichroic mirror 210, and the wavelength of the second light beam is within the transmission wavelength range of the first dichroic mirror 210. By adjusting the relative positions and angles of the first light source 110, the second light source 120, and the first dichroic mirror 210, the initiating light beam projected onto the first dichroic mirror 210 can be reflected to the second light source 120.

[0045] It is understood that the first light beam emitted by the first light source 110 is not entirely projected onto the first dichroic mirror 210. Instead, a portion of the first light beam is projected onto the first dichroic mirror 210, while another portion passes through one side of the first dichroic mirror 210. The portion projected onto the first dichroic mirror 210 is the initiating light beam, and the portion passing through the first dichroic mirror 210 is the outgoing light beam.

[0046] The second light source 120 is a stimulated pump light source. Specifically, the second light source 120 includes a light-emitting body, a dichroic layer, and a first wavelength conversion layer 121. The first wavelength conversion layer 121 can convert light of a specific wavelength into light of another specific wavelength, for example, converting blue light into red or green light. The first wavelength conversion layer 121 can be a fluorescent layer. After the initiating light beam is irradiated by the first wavelength conversion layer 121, it is converted into a second output light beam by the wavelength conversion layer.

[0047] The dichroic layer is disposed on the light-emitting side of the light-emitting body, and the first wavelength conversion layer 121 is disposed on the side of the dichroic layer facing away from the light-emitting body. The light-emitting body is configured to emit a second initiating beam having the same color as the initiating beam. The dichroic layer is configured to transmit the second initiating beam and reflect the second output beam. It is understood that the first wavelength conversion layer 121 converts not only the initiating beam but also the second initiating beam. That is, the second output beam is formed by converting the two initiating beams, thereby further increasing the illumination intensity of the second output beam. The dichroic layer reflects the converted second output beam away from the light-emitting body, thereby increasing the effective utilization of the second output beam.

[0048] The second dichroic mirror 220 is located between the first dichroic mirror 210 and the second light source 120, and is obliquely opposite to the light-emitting surface of the second light source 120. The first light beam passes through the first dichroic mirror 210 from the side closest to the second dichroic mirror 220, so the first light beam is partially or completely projected onto the second dichroic mirror 220. The wavelength of the first light beam is within the transmission wavelength range of the second dichroic mirror 220, so the first light beam can pass through or pass through the second dichroic mirror 220. The wavelength of the second light beam is within the reflection wavelength range of the second dichroic mirror 220, so the second light beam directed toward the second dichroic mirror 220 will be reflected. By adjusting the relative angle between the light-emitting surface of the second light source 120 and the second dichroic mirror 220, the reflection direction of the second light beam can be made the same as the transmission direction of the first light beam, so that the first and second light beams can be emitted in the same direction.

[0049] The light has a light emitting area 420. The first light emitting beam and the second light emitting beam can be directly irradiated to the light emitting area 420, or can be guided to the light emitting area 420 by other reflective structures. There is no limitation here, as long as the first light emitting beam and the second light emitting beam can finally emit light through the light emitting area 420. The light source module also includes a third light source 130, which is used to emit a third light emitting beam. The colors of the first light emitting beam, the second light emitting beam and the third light emitting beam are different from each other; for example, they can be three primary colors that can be mixed into white light, namely blue, green and red. The third light emitting beam also emits light through the light emitting area 420 to achieve the projection of light from the light box 410.

[0050] The first driving element (not shown) can be a linear drive motor or other type of driving device, without limitation. It only needs to be able to drive the first dichroic mirror 210 toward or away from the second dichroic mirror 220. It should be noted that the first driving element can only adjust the distance between the first dichroic mirror 210 and the second dichroic mirror 220, but does not change the distance or angle between the first dichroic mirror 210 and the first light source 110. This ensures that the initiating light beam reflected by the first dichroic mirror 210 reaches the second light source 120.

[0051] Since the first light beam passes through the first dichroic mirror 210 from the side closest to the second dichroic mirror 220, the closer the first dichroic mirror 210 is to the second dichroic mirror 220, the more of the initiating light beam is reflected, the fewer of the first light beam passes through, and thus the more of the second light beam converted by the second light source 120. In other words, the closer the first dichroic mirror 210 is to the second dichroic mirror 220, the fewer of the first light beams are and the more of the second light beams are. The further the first dichroic mirror 210 is from the second dichroic mirror 220, the more of the first light beams are and the fewer of the second light beams are. Therefore, by adjusting the distance between the first dichroic mirror 210 and the second dichroic mirror 220, the ratio of the first and second light beams can be controlled. This ratio affects projection effects such as image brightness and color temperature deviation. Thus, users can adjust the projection to meet their individual projection needs, or the projection device can automatically adjust the projection to meet preset standards.

[0052] For example, in one application scenario, a user can remotely control the first driver through a terminal device based on feedback from the current projected image, thereby automatically adjusting the ratio of the first and second light beams until a satisfactory projection effect is achieved. In another application scenario, the projection device can monitor whether the current projected image meets preset standards at any time and automatically control the first driver to adjust the ratio of the first and second light beams based on the monitoring results, thereby automatically improving the projected image.

[0053] In practical applications, green light has a more significant impact on projection effects, such as the brightness of the projected image. Therefore, the second light beam can be set to green light to improve the final projection effect, that is, to increase the brightness of the projected image. Blue light has stronger illumination energy, so the first light beam can be set to blue light to further increase the illumination intensity of the second light beam.

[0054] In the technical solution of the light source module of the present invention, a portion of the first light beam emitted by the first light source 110 serves as the first output light beam, and another portion serves as the initiating light beam. The initiating light beam can be converted into the second output light beam by the second light source 120. It can be understood that the more initiating light beams there are, the more second output light beams there are, but the first output light beam is correspondingly reduced, that is, the first output light beam and the second output light beam are negatively correlated. The closer the first dichroic mirror 210 is to the second dichroic mirror 220, the larger the reflection area of ​​the first light beam, that is, the more initiating light beams there are, the more second output light beams there are, and the less first output light beam there is. The farther the first dichroic mirror 210 is from the second dichroic mirror 220, the more first output light beams there are and the less second output light beams there are. Therefore, by adjusting the relative position of the first dichroic mirror 210, the ratio of the first output light beam to the second output light beam can be effectively adjusted. Thus, the user or the projection device itself can adjust the ratio of the first output light beam to the second output light beam to improve the color temperature deviation and brightness of the projected image, thereby improving the projection effect of the projection device.

[0055] The third light source 130 can emit the third light beam directly toward the light emitting area 420, or can reflect the third light beam through the first dichroic mirror 210. Figure 1 As shown, the third light source 130 is disposed on a side of the first dichroic mirror 210 away from the second dichroic mirror 220. The first dichroic mirror 210 is also configured to reflect the third light beam toward the direction of the first light source 110. By utilizing the first dichroic mirror 210 to reflect the second light beam, the first, second, and third light beams can be directed in the same direction by properly controlling the installation position of the third light source 130. Of course, in other embodiments, the color of the third light beam can also be the same as that of the second light beam, for example, both can be green, to further increase the amount of light emitted by that color beam.

[0056] In one embodiment, if Figure 3 As shown, the light source module also includes a fourth light source 140 and a third dichroic mirror 230, the fourth light source 140 is used to emit a fourth light beam; the light emitting direction of the fourth light source 140 is opposite to that of the second light source 120; the third dichroic mirror 230 is arranged on the side of the first dichroic mirror 210 away from the first light source 110, and is obliquely opposite to the fourth light source 140; the third dichroic mirror 230 is used to transmit the first light beam and the third light beam, and reflect the fourth light beam toward the direction in which the third light beam transmits the third dichroic mirror 230.

[0057] The fourth output light beam can be the same color as the second output light beam, for example, both are green light, thereby increasing the amount of green light output. It should be noted that since the first output light beam and the third output light beam will pass through the third dichroic mirror 230, the color of the fourth output light beam cannot be the same as the color of the first output light beam and the third output light beam. By using the third dichroic mirror 230 to reflect the fourth output light beam, the installation position of the fourth light source 140 can be reasonably controlled. For example, the light output axis of the fourth light source 140 is made to be at a 45° angle to the third dichroic mirror 230, and the third dichroic mirror 230 is parallel to the first dichroic mirror 210, so that the first output light beam, the second output light beam, the third output light beam and the fourth output light beam are emitted in the same direction.

[0058] In an embodiment parallel to the above embodiment, Figure 4 As shown, the light source module also includes a fourth light source 140 and a third dichroic mirror 230. The fourth light source 140 is used to emit a fourth light beam; the fourth light source 140 and the third light source 130 have light emitting directions opposite to each other; the third dichroic mirror 230 is arranged on the side of the second dichroic mirror 220 away from the first light source 110 and is obliquely opposite to the fourth light source 140; the third dichroic mirror 230 is used to transmit the first and second light beams and reflect the fourth light beam in the direction in which the second light beam transmits the third dichroic mirror 230. The fourth light beam can have the same color as the third light beam, for example, both are red light, thereby increasing the amount of red light emitted. It should be noted that since the first and second light beams will pass through the third dichroic mirror 230, the color of the fourth light beam cannot be the same as the color of the first and second light beams.

[0059] For example, Figure 5 As shown, the light source module also includes a fourth dichroic mirror 240 and a fifth light source 150. The fourth dichroic mirror 240 is arranged on the side of the first dichroic mirror 210 and the second dichroic mirror 220 away from the first light source 110, and the fourth dichroic mirror 240 covers the irradiation area of ​​the first outgoing light beam, the second outgoing light beam and the third outgoing light beam, so that all three light beams pass through the fourth dichroic mirror 240; the fifth light source 150 is tilted relative to the fourth dichroic mirror 240, and is used to emit a fifth outgoing light beam, the color of the fifth outgoing light beam is different from the first outgoing light beam and the second outgoing light beam; the fourth dichroic mirror 240 is used to transmit the first outgoing light beam and the second outgoing light beam, and reflect the fifth outgoing light beam toward the direction in which the first outgoing light beam transmits the fourth dichroic mirror 240.

[0060] Both the first and second output light beams can pass through the fourth dichroic mirror 240. The fourth dichroic mirror 240 reflects the fifth output light beam in the same direction as the first and second output light beams when passing through the fourth dichroic mirror 240. As a result, the first, second, and fifth output light beams can be emitted in the same direction. It should be noted that because the third output light beam also needs to pass through the fourth dichroic mirror 240, the color of the third output light beam cannot be the same as that of the fifth output light beam.

[0061] For example, Figure 6 As shown, the light source module further includes a sixth light source 160, a fifth dichroic mirror 250 and a sixth dichroic mirror 260;

[0062] The fifth dichroic mirror 250 is disposed on a side of the second dichroic mirror 220 facing away from the first light source 110 and is configured to reflect a portion of the first outgoing light beam and transmit the second outgoing light beam. The first outgoing light beam is divided into an inducing sub-beam reflected by the fifth dichroic mirror 250 and an outgoing light sub-beam that is not reflected. The sixth light source 160 is disposed obliquely relative to the fifth dichroic mirror 250 to receive the inducing sub-beam reflected by the fifth dichroic mirror 250. The sixth light source 160 is provided with a second wavelength conversion layer 161 for converting the inducing sub-beam into a sixth outgoing light beam.

[0063] The sixth dichroic mirror 260 is arranged between the fifth dichroic mirror 250 and the sixth light source 160, and is used to transmit the inducing sub-beam and reflect the sixth light-emitting light beam in the direction of the outgoing light beam transmitting the sixth dichroic mirror 260; in the light-emitting direction perpendicular to the first light source 110, there is a gap between the first dichroic mirror 210 and the fifth dichroic mirror 250 to form a light-emitting channel, and the light-emitting channel is used for the outgoing light beam to pass through.

[0064] The fifth dichroic mirror 250 is positioned obliquely relative to the light exit surfaces of the first light source 110 and the sixth light source 160. By adjusting the relative positions of the fifth dichroic mirror 250, the first light source 110, and the sixth light source 160, the inducing sub-beam reflected by the fifth dichroic mirror 250 can be directed to the sixth light source 160.

[0065] It is understood that not all of the first outgoing light beam is projected onto the fifth dichroic mirror 250. Instead, a portion of the first outgoing light beam is projected onto the fifth dichroic mirror 250, while another portion passes through one side of the fifth dichroic mirror 250. The portion projected onto the fifth dichroic mirror 250 is the initiating sub-beam, and the portion passing through the fifth dichroic mirror 250 is the outgoing light sub-beam.

[0066] The sixth light source 160 is a stimulated pump light source. Its detailed structure is similar to that of the second light source 120 and is not further described here. The second wavelength conversion layer 161 can also convert light of a specific wavelength into light of another specific wavelength, for example, converting blue light into red or green light. The second wavelength conversion layer 161 can be a fluorescent layer. After the triggering sub-beam impinges on the second wavelength conversion layer 161, it is converted into the sixth output light beam.

[0067] The sixth dichroic mirror 260 is located between the fifth dichroic mirror 250 and the sixth light source 160, and is obliquely opposed to the light-emitting surface of the sixth light source 160. The outgoing photon beam passes through the fifth dichroic mirror 250 from the side closest to the sixth dichroic mirror 260, so that part or all of the outgoing photon beam is projected toward the sixth dichroic mirror 260. Furthermore, the wavelength of the outgoing photon beam is within the transmission wavelength range of the sixth dichroic mirror 260, so that the outgoing photon beam can pass through or penetrate the sixth dichroic mirror 260. The wavelength of the sixth outgoing light beam is within the reflection wavelength range of the sixth dichroic mirror 260, so the sixth outgoing light beam directed toward the sixth dichroic mirror 260 will be reflected. By adjusting the relative angle between the light-emitting surface of the sixth light source 160 and the sixth dichroic mirror 260, the reflection direction of the sixth outgoing light beam can be made identical to the transmission direction of the outgoing photon beam, so that the outgoing photon and the sixth outgoing light beam can be emitted in the same direction.

[0068] It should be noted that since the sixth dichroic mirror 260 is also located on the light path of the third light beam, the third light beam also needs to pass through the sixth dichroic mirror 260, while the sixth light beam needs to be reflected by the sixth dichroic mirror 260. Therefore, the color of the sixth light beam cannot be the same as that of the third light beam. Of course, the color of the sixth light beam can be the same as that of the second light beam because the sixth dichroic mirror 260 is not on the light path of the second light beam. For example, the second and sixth light beams are both green.

[0069] To sum up, the first light beam emitted by the first light source 110 is divided into an initiating beam, an outgoing light beam and an initiating light beam, and the outgoing light beam is located between the initiating beam and the initiating light beam; the outgoing light beam can be used for final light output through the light output channel, and the initiating beam and the initiating light beam are converted into a second outgoing light beam and a sixth outgoing light beam of the same color, such as green light; thereby, the defect of insufficient green light output caused by the limited conversion capacity of the first wavelength conversion layer 121 can be overcome, so as to further increase the final light output of green light, thereby further improving the projection effect.

[0070] Specifically, the fifth dichroic mirror 250 is parallel to the second dichroic mirror 220; the sixth dichroic mirror 260 is parallel to the first dichroic mirror 210; and the first dichroic mirror 210 and the second dichroic mirror 220 are perpendicular to each other. This ensures that the light beams reflected by the dichroic mirrors remain parallel to each other, making the installation of the light sources in the light box 410 simpler and more compact.

[0071] Based on the sixth light source 160 embodiment, Figure 6 As shown, the light source module may further include a fourth light source 140 for emitting a fourth light beam. The fourth light source 140 is disposed on a side of the fifth dichroic mirror 250 away from the sixth dichroic mirror 260. The fifth dichroic mirror 250 is further configured to reflect the fourth light beam in a direction in which the second light beam passes through the fifth dichroic mirror 250. The color of the fourth light beam may be the same as that of the third light beam, for example, both may be red, thereby increasing the amount of red light emitted.

[0072] For example, Figure 7 As shown, the light source module also includes a second driving member (not shown), which is used to drive the fifth dichroic mirror 250 to move closer to or away from the sixth dichroic mirror 260 to increase or decrease the reflection area of ​​the first light beam. The second driving member (not shown) can be a linear drive motor or other form of driving device, and is not limited here. It only needs to be able to drive the fifth dichroic mirror 250 to move closer to or away from the sixth dichroic mirror 260. It should be noted that the second driving member can only adjust the distance between the fifth dichroic mirror 250 and the sixth dichroic mirror 260, but will not change the distance or angle between the fifth dichroic mirror 250 and the first light source 110, thereby ensuring that the induced sub-beam reflected by the fifth dichroic mirror 250 can irradiate the sixth light source 160.

[0073] Similar to the working principle of the first driving element that can adjust the ratio of the first light beam and the second light beam, the second driving element can also adjust the ratio of the sixth light beam and the light sub-beam by driving the fifth dichroic mirror 250, thereby more finely improving the projection effects such as picture brightness and picture color temperature deviation.

[0074] For example, Figure 1As shown, the light source module further includes a collimating lens 310 and / or a homogenizing lens 320, which are arranged on the light exit paths of the first and second light exit beams. The collimating lens 310 can be arranged on the light entrance side of the light exit area 420 to improve the collimation of the light beam passing through the light exit area 420. The homogenizing lens 320 can be arranged on the light entrance side of the light exit area 420 to make the light beam passing through the light exit area 420 more uniform. The homogenizing lens 320 can be, for example, a fly-eye lens to further improve the light exit effect of the light source module.

[0075] The present invention also proposes a projection device, which includes a light source module. The specific structure of the light source module refers to the above-mentioned embodiment. Since this projection device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0076] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A light source module, characterized in that: include: a first light source, configured to emit a first light beam; a first dichroic mirror, obliquely opposite to the first light source, the first dichroic mirror being configured to reflect a portion of the first light beam, the first light beam being divided into an initiating light beam reflected by the first dichroic mirror and a first outgoing light beam that is not reflected; a second light source, obliquely opposed to the first dichroic mirror, to receive the initiating light beam reflected by the first dichroic mirror; the second light source is provided with a first wavelength conversion layer, the first wavelength conversion layer being configured to convert the initiating light beam into a second output light beam; a second dichroic mirror disposed between the first dichroic mirror and the second light source, the second dichroic mirror configured to transmit at least a portion of the first outgoing light beam and reflect the second outgoing light beam in a direction in which the first outgoing light beam transmits the second dichroic mirror; The first driving element is used to drive the first dichroic mirror to move closer to or away from the second dichroic mirror, so as to increase or decrease the reflection area of ​​the first light beam.

2. The light source module according to claim 1, wherein: The light source module also includes a third light source for emitting a third light beam; the third light source is arranged on a side of the first dichroic mirror away from the second dichroic mirror; the first dichroic mirror is also used to reflect the third light beam toward the direction of light emission of the first light source.

3. The light source module according to claim 2, wherein: The light source module further includes a fourth light source and a third dichroic mirror, wherein the fourth light source is configured to emit a fourth light beam; the light emitting direction of the fourth light source is opposite to that of the second light source; The third dichroic mirror is arranged on a side of the first dichroic mirror away from the first light source and is obliquely opposite to the fourth light source; the third dichroic mirror is used to transmit the first outgoing light beam and the third outgoing light beam, and reflect the fourth outgoing light beam in the direction in which the third outgoing light beam transmits the third dichroic mirror.

4. The light source module according to claim 2, wherein: The light source module further includes a fourth light source and a third dichroic mirror, wherein the fourth light source is configured to emit a fourth light beam; the light emitting direction of the fourth light source is opposite to that of the third light source; The third dichroic mirror is arranged on a side of the second dichroic mirror away from the first light source and is obliquely opposite to the fourth light source; the third dichroic mirror is used to transmit the first and second outgoing light beams, and reflect the fourth outgoing light beam toward the direction in which the second outgoing light beam transmits the third dichroic mirror.

5. The light source module according to claim 2, wherein: The light source module further includes a fourth dichroic mirror and a fifth light source, wherein the fourth dichroic mirror is disposed on a side of the first dichroic mirror and the second dichroic mirror facing away from the first light source; the fifth light source is obliquely opposed to the fourth dichroic mirror and is configured to emit a fifth light beam, the color of the fifth light beam being different from the color of the first light beam and the second light beam; The fourth dichroic mirror is used to transmit the first outgoing light beam and the second outgoing light beam, and reflect the fifth outgoing light beam in the direction in which the first outgoing light beam transmits the fourth dichroic mirror.

6. The light source module according to claim 1, wherein: The light source module further includes a sixth light source, a fifth dichroic mirror and a sixth dichroic mirror; The fifth dichroic mirror is disposed on a side of the second dichroic mirror away from the first light source and is used to reflect a portion of the first outgoing light beam and transmit the second outgoing light beam; the first outgoing light beam is divided into an inducing sub-beam reflected by the fifth dichroic mirror and an outgoing sub-beam not reflected; The sixth light source is arranged obliquely opposite to the fifth dichroic mirror to receive the inducing sub-beam reflected by the fifth dichroic mirror; the sixth light source is provided with a second wavelength conversion layer for converting the inducing sub-beam into a sixth output light beam; The sixth dichroic mirror is provided between the fifth dichroic mirror and the sixth light source, and is used to transmit the inducing sub-beam and the outgoing sub-beam, and reflect the sixth outgoing light beam in the direction in which the outgoing sub-beam transmits the sixth dichroic mirror; In a direction perpendicular to the light emission of the first light source, a gap is formed between the first dichroic mirror and the fifth dichroic mirror to form a light-emitting channel, and the light-emitting channel is used for the outgoing light beam to pass through.

7. The light source module according to claim 6, wherein: The fifth dichroic mirror is parallel to the second dichroic mirror; the sixth dichroic mirror is parallel to the first dichroic mirror; and the first dichroic mirror and the second dichroic mirror are perpendicular to each other.

8. The light source module according to claim 6, wherein: The light source module further includes a second driving component, and the second driving component is used to drive the fifth dichroic mirror to move closer to or away from the sixth dichroic mirror, so as to increase or decrease the reflection area of ​​the first outgoing light beam.

9. The light source module according to any one of claims 1 to 8, wherein: The light source module further includes a collimating lens and / or a homogenizing lens, and the collimating lens and / or the homogenizing lens are arranged on the light output paths of the first light beam and the second light beam.

10. A projection device, characterized in that: The light source module comprises the light source module according to any one of claims 1 to 9.

Images