CN109343227B - A light projection module and optical equipment - Google Patents
A light projection module and optical equipment Download PDFInfo
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- CN109343227B CN109343227B CN201811451632.4A CN201811451632A CN109343227B CN 109343227 B CN109343227 B CN 109343227B CN 201811451632 A CN201811451632 A CN 201811451632A CN 109343227 B CN109343227 B CN 109343227B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
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Abstract
本申请公开了一种光投射模组及光学设备。光投射模组包括：相向设置并对盒封装的第一基板和第二基板，第一基板与第二基板之间形成真空的盒内空间；设置在第一基板和第二基板之间的激励组件；其中，第一基板朝向第二基板的第一侧设置有光源发射组件，第二基板朝向第一基板的第一侧设置有光学组件，光源发射组件发射的光线经光学组件扩散，以作为光投射模组的出射光线；激励组件在盒内空间中由真空环境转变为空气环境后处于激励时，阻挡光源发射组件向光学组件发射的光线。本申请的方案在光投射模组受外力影响致使内部的光学组件发生破裂或脱落后，避免光投射模组的出射光线对使用者造成伤害。
The present application discloses a light projection module and an optical device. The light projection module includes: a first substrate and a second substrate that are arranged opposite to each other and packaged in a box, and a vacuum inner space is formed between the first substrate and the second substrate; an excitation device arranged between the first substrate and the second substrate assembly; wherein, a light source emitting assembly is disposed on the first side of the first substrate facing the second substrate, an optical assembly is disposed on the first side of the second substrate facing the first substrate, and the light emitted by the light source emitting assembly is diffused by the optical assembly to serve as a The light emitted from the light projection module; when the excitation component is excited after being transformed from a vacuum environment to an air environment in the space inside the box, it blocks the light emitted by the light source emission component to the optical component. In the solution of the present application, after the optical components inside the light projection module are broken or fallen off due to the influence of external force, the light emitted by the light projection module can be prevented from causing damage to the user.
Description
Technical Field
The application relates to the technical field of light projection, in particular to a light projection module and optical equipment.
Background
Because of the characteristics of small size, high photoelectric efficiency, good directivity, high response speed and the like of the laser emitter, the laser emitter is the first choice of the existing more and more light projection equipment as a light source emitting component.
Laser is a high-collimation, high-energy light, and the safety of use becomes a high concern for manufacturers and users. Laser safety is classified into four classes, Class1 to Class4, according to international standards. For consumer products, only Class1 is safe and can be used directly. The safety level of the laser emitted by the laser transmitter is Class4, and the laser cannot be directly used. Therefore, the light projection module adopting the laser emitter at present is provided with an optical component on a laser emergent path to diffuse a highly collimated laser beam into a uniform smooth surface or a light spot, so that the emergent light reaches the safety level of Class 1.
The optical components of current light projection modules are generally microstructures made of materials such as glass and polymers, and have thin thickness and are easy to break. When the light projection module is acted by external force (such as collision and extrusion), the optical component is easy to break or fall off, so that high-energy laser beams which are not normally diffused are emitted, and hidden danger is brought to the safety of a user.
In view of this, the present application provides a technique to prevent the laser projection module from emitting a light beam that may cause damage due to the optical component being broken or dropped.
Disclosure of Invention
An object of the present invention is to provide a light projection module and an optical apparatus, which can prevent the light emitted from the light projection module from damaging the user when the light projection module is broken or falls off due to the influence of external force.
In order to achieve the above purpose, the following technical solutions are adopted in the embodiments of the present application:
in a first aspect, a light projection module is provided, comprising:
the light source module comprises a first substrate and a second substrate which are arranged oppositely, wherein the first substrate and the second substrate are packaged in a box to form a vacuum box inner space, a light source emitting assembly is arranged on the first side, facing the second substrate, of the first substrate, an optical assembly is arranged on the first side, facing the first substrate, of the second substrate, and light emitted by the light source emitting assembly is diffused through the optical assembly to be used as emergent light of the light projection module;
and the excitation assembly is arranged between the first substrate and the second substrate, and when the excitation assembly is excited after being converted from a vacuum environment to an air environment in the space in the box, the volume of the excitation assembly expands to block the light emitted to the optical assembly by the light source emission assembly.
In a second aspect, an optical device is provided, comprising the light projection module of the first aspect.
In the light projection module of this application embodiment, be provided with the first base plate of light source emission subassembly and be provided with the second base plate vacuum of optical component to box encapsulation to set up the excitation subassembly that can receive air excitation in the box. When the light projection module loses the sealing performance due to the external force, the external air can enter the box to promote the excitation assembly to excite so as to prevent the light source emission assembly from emitting light to the optical assembly, thereby avoiding the optical assembly from being broken or falling off due to the external force, and preventing the emergent light of the light projection module from irradiating a user without normal diffusion and damaging the user.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a light projection module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a light projection module provided in an embodiment of the present application in a first practical application;
FIG. 3 is a schematic diagram of a first position corresponding to a foaming portion of an optical projection module in practical application;
FIG. 4 is a schematic diagram of a second position corresponding to a foaming portion of an optical projection module in practical application;
FIG. 5 is a schematic diagram of a third position corresponding to a foaming portion of an optical projection module in practical application;
FIG. 6 is a schematic diagram of a fourth position corresponding to a foaming portion of an optical projection module in practical application;
FIG. 7 is a schematic view of the expanded foam portion after air is introduced into the light projection module box;
fig. 8 is a schematic structural diagram of a light projection module provided in the embodiment of the present application in a second practical application;
fig. 9 is a schematic view showing the change of color of the photochromic film after air enters into the middle light projection module box in the second practical 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 some, but not all, embodiments of the present application. 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.
As mentioned above, the light projection module using the laser transmitter at present has an optical component disposed on the laser exit path to diffuse the laser beam into a wide-angle uniform light surface or light spot, thereby achieving the safety level of consumer products. The optical component is generally a microstructure made of glass, polymer and other materials, and when the light projection module is subjected to an external force, the optical component is easily broken or falls off, so that the light projection module emits a non-diffused high-energy light beam, which brings a hidden danger to the safety of a user. To address this problem, the present application proposes a solution that enables a light projection module to have more reliable light protection performance.
In one aspect, as shown in fig. 1, an embodiment of the present application provides a light projection module, including:
a first substrate 1 and a second substrate 2 disposed opposite to each other. The first substrate 1 and the second substrate 2 are packaged in a vacuum box to form a vacuum box inner space, the first side of the first substrate 1 facing the second substrate 2 is provided with a light source emitting assembly 11, and the first side of the second substrate 2 facing the first substrate 11 is provided with an optical assembly 21. The light emitted from the light source emitting component 11 is diffused by the optical component 21 to be used as the emergent light of the light projection module.
And an excitation assembly 3 disposed between the first substrate 1 and the second substrate 2 and being excitable by air. When the space in the box of the excitation assembly 3 is excited after being converted from a vacuum environment to an air environment, the light emitted from the light source emitting assembly 11 to the optical assembly 21 is blocked, and when the space in the box is in a non-excited state, the light emitted from the light source emitting assembly 11 to the optical assembly 21 is not blocked or is less blocked in a relatively excited state.
In the light projection module of this application embodiment, be provided with the first base plate of light source emission subassembly and be provided with the second base plate vacuum of optical component to box encapsulation to set up the excitation subassembly that can receive air excitation in the box. When the light projection module loses the sealing performance due to the external force, the external air can enter the box to promote the excitation assembly to excite so as to prevent the light source emission assembly from emitting light to the optical assembly, thereby avoiding the optical assembly from being broken or falling off due to the external force, and preventing the emergent light of the light projection module from irradiating a user without normal diffusion and damaging the user.
It should be understood that the exciting assembly 3 of the embodiment of the present application blocks light emitted from the light source emitting assembly 11 toward the optical assembly 21 under the excitation of air more than the vacuum environment, so that the energy per unit area of the emergent light of the light projection module when the exciting assembly 3 is in the excited state is smaller than the energy per unit area of the emergent light of the light projection module when the exciting assembly 3 is in the non-excited state.
The light projection module according to the embodiment of the present application will be described in detail below with reference to specific implementations of the excitation assembly.
Implementation mode one
As shown in fig. 2, the light projection module of the first implementation mode includes:
a first substrate 1 and a second substrate 2 provided to the cassette, and a support portion 4 vacuum-framing the first substrate 1 and the second substrate 2.
The first substrate 1 is provided with a light source emitting assembly 11 facing the first side of the second substrate 2, and the light source emitting assembly 11 may be a laser emitter, and specifically may be a laser emitting chip for emitting a laser beam in the laser emitter.
The first side of the second substrate 2 facing the first substrate 11 is provided with an optical assembly 21, and the optical assembly 21 may be an optical microstructure arranged in a matrix, and can uniformly diffuse the light emitted by the light source emitting assembly 11 to form an emergent light. It should be understood that the second substrate 2 is located at the light emitting side of the light projection module compared to the first substrate 1, and thus the second substrate 2 is a transparent substrate.
Wherein, the excitation subassembly that sets up in the light projection module box includes: a foam portion 31 which does not transmit light.
Under normal conditions, the inner cavity formed by the first substrate 1 and the second substrate 2 to the box is in a vacuum environment, and the foaming portion 31 is always in a non-excited state because it cannot be excited by the outside air.
In order to avoid affecting the light projection module to emit light under normal conditions, the foaming portion 31 is not suitable to be disposed on the path of the light emitted from the light source emitting component 11 in the non-excited state. That is, the forward projection a of the foaming part 31 with respect to the first substrate 2 in the non-excited state and the forward projection B of the light source emitting element 11 with respect to the first substrate 1 do not have an overlapping region.
By way of exemplary introduction, the foaming part 31 may be provided on the first side of the first substrate 1, and/or on the inner wall of the support part 4.
For example, as shown in fig. 3, the foaming part 31 is provided on the first side of the first substrate 1; or as shown in fig. 4, the foaming part 31 is provided on one of the inner walls of the support part 4; still alternatively, as shown in fig. 5, the foamed part 31 is provided on at least two inner walls (including all inner walls) of the support part 4; as shown even in fig. 6, the foamed part 31 is provided on the first side of the first substrate 1 and on all the inner walls of the support part 4.
It should be understood that fig. 3 to fig. 6 are only used to illustrate several possible arrangement positions of the foaming portion 31, and do not limit the protection scope of the embodiment of the present application, and the description is not repeated herein.
When the light projection module is structurally damaged and the vacuum environment in the box is lost, as shown in fig. 7, the external air enters the box, so that the foaming part 31 is converted from the non-excited state to the excited state.
In the excited state, the volume of the foaming portion 31 expands, thereby blocking the light emitted from the light source emitting element 11 toward the optical element 21.
On the basis of the above, in order to ensure that the foaming portion 31 can effectively block the light emitted by the light source emitting component 11 in the excited state, the material of the foaming portion 31 at least includes: a polyurethane.
Practice shows that the foaming part 31 made of polyurethane can be rapidly expanded in the air and fill the whole box inner space only by the thickness of 100um to 200um under the non-excitation state, thereby playing an effective light ray blocking role.
In addition, referring to fig. 2, in order to ensure the sealing performance of the light projection module under normal conditions and prevent the foaming portion 31 from being easily excited by air to expand to affect the emergent light, in this practical application, a sealant 5 of a high-strength sealing material may be used to cover the joint between the supporting portion 4 and the first substrate 1 and/or the joint between the supporting portion 4 and the second substrate 2.
Implementation mode two
As shown in fig. 8, the light projection module of the second implementation mode includes:
a first substrate 1 and a second substrate 2 provided to the cassette, and a support portion 4 vacuum-framing the first substrate 1 and the second substrate 2.
The first substrate 1 is provided with a light source emitting assembly 11 facing the first side of the second substrate 2, and the light source emitting assembly 11 may be a laser emitter, and specifically may be a laser emitting chip for emitting a laser beam in the laser emitter.
The first side of the second substrate 2 facing the first substrate 11 is provided with an optical assembly 21, and the optical assembly 21 may be an optical microstructure arranged in a matrix, and can uniformly diffuse the light emitted by the light source emitting assembly 11 to form an emergent light. It should be understood that the second substrate 2 is located at the light emitting side of the light projection module compared to the first substrate 1, and thus the second substrate 2 is a transparent substrate.
Wherein, the excitation subassembly that sets up in the light projection module box includes: a gas-chromic film 32 disposed on a first side of the first substrate 1 and covering the light source emitting assembly 11.
Under normal conditions, the inner cavity formed by the first substrate 1 and the second substrate 2 to the box is in a vacuum environment, and the gas-induced color changing film 32 is always in a non-excited state because the film cannot be excited by the outside air.
In the non-excited state, the gas-chromic film 32 has a first light transmittance, and may not block or less block the light emitted from the light source emitting assembly 11 to the optical assembly 21.
On the basis of the above, the gas-variable color film 32 may be further planarized, thereby preventing the path of the light emitted from the light source emitting assembly 11 from being changed after passing through the gas-variable color film 32.
When the light projection module is structurally damaged and the vacuum environment in the box is lost, as shown in fig. 9, the external air enters the box, and the photochromic film 32 is converted from the non-excited state to the excited state.
In the excited state, the gas-chromic film 32 changes color, has a second light transmittance that is less than the first light transmittance, and may block more light from the light source emitting assembly 11 toward the optical assembly 21 than in the non-excited state.
In order to ensure that the gas-variable color film 32 can effectively block the light emitted from the light source emitting assembly 11 in the activated state, the material of the gas-variable color film 32 preferably includes at least: tungsten oxide.
The practice shows that the gas-induced color-changing film 32 made of tungsten oxide is close to a transparent film when in a non-excited state in a vacuum environment, and has small influence on the light rays emitted by the source emission component 11; and in the air environment, hydrogen atoms and hydrogen ions in the air are used as excitation sources to excite coloring, so that the light emitted from the light source emitting component 11 to the optical component 21 is blocked in a mode of reducing the transmittance of the light.
The above is an exemplary description of the light projection module according to the embodiment of the present application. It will be understood by those skilled in the art that various modifications and enhancements can be made without departing from the principles of the present invention, for example, the actuator assembly of the embodiments of the present application can be composed of the foam portion and the photochromic film described above.
In addition, referring to fig. 8, in order to ensure the sealing performance of the light projection module under normal conditions and prevent the photochromic film 32 from being easily colored by air excitation, the second practical application may further use the sealant 5 of a high-strength sealing material to cover the joint of the support portion 4 and the first substrate 1 and/or the joint of the support portion 4 and the second substrate 2.
The above is an example description of the light projection module according to the embodiment of the present application. It should be noted that, the embodiment of the present application does not limit the light emitted by the light source emitting assembly to be laser light, but any light emitting harmful light can be applied to the solution of the embodiment of the present application.
Correspondingly, the embodiment of the present application further provides an optical apparatus, which includes the light projection module.
Based on this light projection module, the optical equipment of this application embodiment has reliable light protect function, is particularly suitable for laser source for laser can use on civilian-grade consumer products, has higher practical value.
For example, in practical applications, the optical device of the present embodiment may be a communication device, a light effect device, a light indication device, a 3D identification device, and the like, in which laser is used as a light source.
It should be understood that the optical device according to the embodiment of the present application can implement all functions of the light projection module, and the functions of the light projection module shown in fig. 1 to 9 are not described herein again.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A light projection module, comprising:
the light source module comprises a first substrate and a second substrate which are arranged oppositely, wherein the first substrate and the second substrate are packaged in a box to form a vacuum box inner space, a light source emitting assembly is arranged on the first side, facing the second substrate, of the first substrate, an optical assembly is arranged on the first side, facing the first substrate, of the second substrate, and light emitted by the light source emitting assembly is diffused through the optical assembly to be used as emergent light of the light projection module;
and the excitation assembly is arranged between the first substrate and the second substrate, and when the excitation assembly is excited after being converted from a vacuum environment to an air environment in the space in the box, the volume of the excitation assembly expands to block the light emitted to the optical assembly by the light source emission assembly.
2. The light projection module of claim 1,
the excitation assembly includes:
the foaming part has no overlapped area between the orthographic projection of the foaming part on the first substrate in a non-excited state and the orthographic projection of the light source emission component on the first substrate.
3. The light projection module of claim 2,
the material of the foaming part comprises: a polyurethane.
4. The light projection module of claim 2,
the foaming portion is disposed at least on a first side of the first substrate.
5. The light projection module of claim 2,
the first substrate and the second substrate are sealed by a support part, and the foaming part is at least arranged on the inner wall of the support part.
6. The light projection module of claim 5,
the joint of the supporting part and the first substrate and/or the joint of the supporting part and the second substrate are/is covered by a sealant.
7. The light projection module of claim 1,
the excitation assembly further comprises:
a gas-chromic film disposed on a first side of the first substrate and covering the light source emitting assembly, the gas-chromic film having a light transmittance in a non-excited state greater than a light transmittance in an excited state.
8. The light projection module of claim 7,
the material of the gas-induced discoloration film comprises: tungsten oxide.
9. The light projection module of any of claims 1-8,
the light source emitting component comprises a laser emitting chip.
10. An optical device comprising a light projection module according to any one of claims 1-9.
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| CN201811451632.4A CN109343227B (en) | 2018-11-30 | 2018-11-30 | A light projection module and optical equipment |
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| CN201811451632.4A CN109343227B (en) | 2018-11-30 | 2018-11-30 | A light projection module and optical equipment |
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| CN109343227B true CN109343227B (en) | 2021-05-28 |
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| CN112485803A (en) * | 2019-08-21 | 2021-03-12 | Oppo广东移动通信有限公司 | Laser emitting device, manufacturing method thereof and flight time measuring device |
| CN114665381A (en) * | 2020-12-23 | 2022-06-24 | 常州星宇车灯股份有限公司 | Laser module, car light and vehicle based on from doubling of frequency laser crystal |
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