CN108663872B - A laser structure and mobile terminal - Google Patents

Abstract

The invention provides a laser structure and a mobile terminal. The laser structure includes: a support body provided with a ventilation hole; a metal dome structure covering the ventilation hole; The air pressure in the space is lower than the external atmospheric pressure, and a laser transmitter is arranged in the closed space, and the laser transmitter faces the diffuser; when the air pressure in the closed space is lower than the external atmospheric pressure, the metal shrapnel structure is in the first state, and the laser transmitter and the laser transmitter are connected. The electrical connection between the driving circuits; when the closed space is communicated with the outside world, the metal dome structure is in the second state, and the electrical connection between the laser transmitter and the driving circuit is disconnected. The invention adopts air-tight packaging, controls the state of the metal shrapnel structure according to the air pressure, and then controls the operation of the laser transmitter, which can ensure the size of the package on the basis of protecting the safety of human eyes, avoid the loss of transmitting power and enhance the heat dissipation capacity.

Description

A laser structure and mobile terminal

technical field

The invention relates to the technical field of electronic products, in particular to a laser structure and a mobile terminal.

Background technique

With the continuous development of face unlocking, more and more terminal devices will apply 3D deep-sensing detection technology. The principle of this technology is shown in Figure 1. A laser transmitter 1 is installed on the terminal device. The object is used to emit invisible light, and then the infrared camera 2 calculates the depth information of the illuminated object according to the information of the received reflected light. The angle of the laser directly emitted by the laser transmitter is usually between 7-9 degrees, and the energy of the laser is very strong. If the laser with such a small angle is directly irradiated on the human face, it will cause damage to the retina of the human eye, so the laser emission The light emitted by the laser transmitter is usually modulated to 60*45° by the diffuser or diffraction grating element, and then evenly irradiated on the face. As shown in Figure 2, the light emitted by the laser transmitter 1 is modulated by the diffuser 3. It can not only ensure that the entire face is irradiated, but also ensure that no damage is caused to the face. However, when the diffuser or diffraction grating of the laser transmitter is damaged or falls off, since the laser transmitter is not damaged and its normal operation is not damaged, the laser emitted by the laser transmitter is likely to directly irradiate the human face and cause damage to the human eye. .

At present, there are two main solutions in the industry:

A photosensitive sensor is placed in the laser structure. As shown in Figure 3, when the diffuser 3 of the laser transmitter 1 is damaged or falls off, the reflected laser energy detected by the photosensitive sensor 4 will change. The change of the laser energy is determined to determine whether the diffuser 3 falls off or is damaged, so as to feed back to the driving IC (integrated circuit, integrated circuit) to control the operation of the laser transmitter 1 . The disadvantage of this technology is that the space in the terminal device is very tight, and placing the photosensitive sensor 4 in the laser structure will increase the size and cause difficulty in stacking the structure.

Or as shown in FIG. 4a and FIG. 4b, a layer of ITO (indium tin oxide) film 31 is plated on the surface of the diffusion sheet 3. When the diffusion sheet 3 is damaged or falls off, the impedance of the ITO film 31 will change. The impedance change at the impedance detection pin 32 is fed back to the driver IC to control the operation of the laser transmitter. The disadvantage of this technique is that the ITO film 31 will lose a small part of the luminous power, and the cost is high.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a laser structure and a mobile terminal, so as to solve the problem that the built-in sensor of the existing laser structure increases the size or loses the luminous power and increases the cost by setting the ITO film.

In order to solve the above problems, the embodiments of the present invention are implemented as follows:

In a first aspect, an embodiment of the present invention provides a laser structure, including:

a support body, which is provided with ventilation holes;

Metal dome structure covering the vent hole;

The diffusing sheet, the diffusing sheet, the supporting body and the metal shrapnel structure form a closed space, the air pressure in the closed space is lower than the external atmospheric pressure, and a laser transmitter is arranged in the closed space, and the laser transmitter faces the diffusing sheet;

When the air pressure in the enclosed space is lower than the outside atmospheric pressure, the metal shrapnel structure is in the first state, and the electrical connection between the laser transmitter and the driving circuit is turned on; when the closed space is connected to the outside world, the metal shrapnel structure is in the second state, which is disconnected. Open the electrical connection between the laser transmitter and the driver circuit.

In a second aspect, an embodiment of the present invention provides a mobile terminal, including the above-mentioned laser structure.

The technical solution of the present invention is that a vent hole is arranged on the support body, and a metal dome structure is covered on the vent hole, so that the support body, the metal dome structure and the diffuser located on the support body form a closed space, and a laser transmitter is arranged in the closed space. , the laser emitter is facing the diffuser, so that the emitted laser is emitted after the diffuser, and the air pressure in the enclosed space is lower than the outside atmospheric pressure, so that the metal shrapnel structure can conduct the electrical between the laser emitter and the driving circuit under the action of air pressure. Connect, disconnect the electrical connection between the laser transmitter and the drive circuit when the closed space is connected to the outside world, realize the use of airtight packaging to control the state of the metal shrapnel structure, and then control the work of the laser transmitter, which can protect the safety of human eyes. On the basis of , ensure the package size, avoid the loss of transmit power and enhance the heat dissipation capability of the laser structure.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments of the present invention. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative labor.

Fig. 1 shows the schematic diagram of the prior art 3D depth sensing technology;

Fig. 2 shows the schematic diagram of the light emitted by the laser emitter modulated by the diffuser;

Figure 3 shows a schematic diagram of a prior art sensor arranged in a laser structure;

Fig. 4a shows the schematic diagram of disposing ITO film on the laser structure in the prior art;

Fig. 4b shows the schematic diagram of the ITO film of the prior art laser structure and the impedance detection pin;

FIG. 5 shows one of the schematic structural diagrams of the laser according to the embodiment of the present invention;

FIG. 6 is a schematic diagram showing the cooperation between the metal dome structure and the driving circuit according to the embodiment of the present invention;

FIG. 7 shows the second schematic diagram of the laser structure according to the embodiment of the present invention;

FIG. 8 shows a schematic diagram of a laser transmitter packaging method according to an embodiment of the present invention;

9 shows a schematic diagram of a support body according to an embodiment of the present invention;

FIG. 10 shows a schematic diagram of arranging pads on a support according to an embodiment of the present invention;

Fig. 11 shows a schematic diagram of a welding laser emitter in a support body according to an embodiment of the present invention;

Fig. 12 is a schematic diagram showing the cooperation between the support body and the diffuser sheet according to the embodiment of the present invention;

FIG. 13 is a schematic diagram showing the structure of the welded metal dome on the support body according to the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

An embodiment of the present invention provides a laser structure, as shown in FIG. 5 to FIG. 7 , including:

The support body 5, the support body 5 is provided with a ventilation hole 51; the metal dome structure 6 covering the ventilation hole 51; the diffuser 3, the diffuser 3, the support body 5 and the metal dome structure 6 form a closed space, and the closed space The air pressure in the enclosed space is lower than the outside atmospheric pressure, and the laser emitter 1 is arranged in the enclosed space, and the laser emitter 1 faces the diffuser 3; when the air pressure in the enclosed space is lower than the outside atmospheric pressure, the metal shrapnel structure 6 is in the first state, and the laser emission is turned on. The electrical connection between the laser transmitter 1 and the driving circuit 7 is established; when the closed space is connected to the outside world, the metal dome structure 6 is in the second state, and the electrical connection between the laser transmitter 1 and the driving circuit 7 is disconnected.

The laser structure provided by the embodiment of the present invention includes a support body 5 , a metal dome structure 6 and a diffuser 3 , wherein the support body 5 is in the shape of a drum or square barrel without a cover, and a ventilation hole 51 is provided on the side wall of the support body 5 , the metal dome structure 6 covers the ventilation hole 51 . The diffuser 3 is arranged above the support body 5 at the position of the upper end cover of the barrel-shaped structure. Through the cooperation of the diffuser 3 , the support body 5 and the metal dome structure 6 , a closed space can be formed. The enclosed space can be formed in an environment lower than the external atmospheric pressure (eg, a vacuum environment), so that the air pressure in the enclosed space is lower than the external atmospheric pressure.

A laser transmitter 1 is arranged in the formed closed space, wherein the laser transmitter 1 is in contact with the inner surface of the support body 5, specifically the inner surface of the bottom of the support body 5, and is opposite to the diffusion sheet 3 and faces the diffusion sheet 3, so that The laser light emitted by the laser transmitter 1 can be emitted after the diffusion sheet 3, so that the diffusion sheet 3 can be fully utilized, and the light emitted by the laser transmitter 1 can be prevented from causing damage to the face.

The metal dome structure 6 has different states under different air pressures. When the laser structure is in the external atmospheric pressure environment, since the air pressure in the enclosed space is lower than the external atmospheric pressure, the metal shrapnel structure 6 will conduct the electrical connection between the laser transmitter 1 and the driving circuit 7 under the action of the external air pressure. The elastic sheet structure 6 is in the first state close to the ventilation hole 51 . If the diffuser 3 is damaged, the outside air will enter the laser structure, and the metal dome structure 6 will be in the second state away from the ventilation hole 51 , disconnecting the electrical connection between the laser transmitter 1 and the driving circuit 7 .

It should be noted that the metal dome structure 6 in the embodiment of the present invention is equivalent to a switch, and the state of the laser structure during packaging can be seen in FIG. connection (see Fig. 6), under the external atmospheric pressure, the metal shrapnel structure 6 is in the first state under the action of the external air pressure, and the electrical connection between the laser transmitter 1 and the driving circuit 7 will be turned on. For the specific structure, see Figure 5. At this time, it is equivalent to that the switch in FIG. 6 is always in a closed state, and the laser transmitter 1 can work normally. Once the diffuser 3 is destroyed, the outside air enters the inside of the laser structure. At this time, the metal dome structure 6 is in the second state, which is equivalent to that the switch in FIG. 7, the laser transmitter 1 will stop working to protect the safety of human eyes.

In the embodiment of the present invention, by using airtight packaging to control the state of the metal dome structure, and then control the operation of the laser transmitter, the package size can be ensured on the basis of protecting human eye safety, the loss of transmission power can be avoided, and the performance of the laser structure can be enhanced. heat dissipation capacity.

In the embodiment of the present invention, as shown in FIG. 5 and FIG. 7 , the outer surface of the support body 5 is provided with a first pad 81 around the vent hole 51 , and the metal dome structure 6 is welded on the first pad 81 and seals the vent hole 51 A second pad 82 is provided between the first pad 81 and the vent hole 51, the first pad 81 and the second pad 82 are connected in series in the drive circuit, and the drive circuit includes the laser transmitter 1 and the drive circuit 7 When the metal dome structure 6 is in the first state, the metal dome structure 6 is in contact with the second pad 82; when the metal dome structure 6 is in the second state, the metal dome structure 6 is separated from the second pad 82.

First pads 81 are provided on the periphery of the position where the vent holes 51 are provided on the outer surface of the support body 5 , wherein the number of the first pads 81 may be multiple, and are provided around the vent holes 51 . By arranging the first pads 81 and utilizing the cooperation between the first pads 81 and the metal dome structure 6 , the metal dome structure 6 can cover the ventilation holes 51 , and then the ventilation holes 51 can be closed. Wherein, the metal dome structure 6 is connected with the first pad 81 by welding, which can ensure the tightness of the connection while ensuring the sealing.

A second pad 82 is arranged between the first pad 81 and the vent hole 51 . The vent hole 51 , the second pad 82 and the first pad 81 are arranged along the radial direction of the vent hole 51 . The first pad 81 is always in contact.

Both the first pad 81 and the second pad 82 are connected in series in the driving circuit, and by connecting the first pad 81 and the second pad 82 in the driving circuit, the metal dome structure 6 can be connected to the first pad. When the disc 81 is in contact with the second pad 82, the electrical connection between the laser transmitter 1 and the driving circuit 7 is turned on, or when the metal dome structure 6 is only in contact with the first pad 81, the laser transmitter 1 and the drive circuit 7 are disconnected. Electrical connection between drive circuits 7 .

Among them, the first pad 81 is connected in series in the driving circuit through the first electrical pin, and the second pad 82 is connected in series in the driving circuit through the second electrical pin; the first electrical pin, the driving circuit 7 and the laser emission The laser transmitter 1 is connected in sequence, and the second electrical pin is electrically connected with the laser transmitter 1 .

Through the electrical connection between the first pad 81 and the first electrical pin, the electrical connection between the first electrical pin and the driving circuit 7, and the electrical connection between the driving circuit 7 and the laser transmitter 1, the first pad 81 is connected in series In the driving loop; through the electrical connection between the second pad 82 and the second electrical pin, the second electrical pin is electrically connected with the laser transmitter 1, thereby realizing the series connection of the second pad 82 in the driving loop. The support body 5 is provided with metal wirings, which is convenient to realize the above-mentioned electrical connection.

When the metal dome structure 6 is in contact with both the first pad 81 and the second pad 82 , the metal dome structure 6 is in the first state, and the metal dome structure 6 can conduct the connection between the laser transmitter 1 and the driving circuit 7 . electrical connection. When the metal dome structure 6 is only in contact with the first pad 81 , the metal dome structure 6 is in the second state, and the metal dome structure 6 can disconnect the electrical connection between the laser transmitter 1 and the driving circuit 7 .

When the metal dome structure 6 is in the first state, the metal dome structure 6 is in contact with the second pad 82 , and a structural form in which the metal dome structure 6 is in contact with the first pad 81 and the second pad 82 is formed. In the second state, the metal dome structure 6 is separated from the second pad 82 , and at this time, a structure form in which the metal dome structure 6 is in contact with the first pad 81 and separated from the second pad 82 is formed.

Wherein, when the air pressure in the closed space is lower than the outside atmospheric pressure, the metal dome structure 6 is in the first state; when the closed space is communicated with the outside, the metal dome structure 6 is in the second state. That is, if the structure formed by the diffuser 3, the support body 5 and the metal dome structure 6 is kept sealed, the metal dome structure 6 can be in the first state, and the laser transmitter 1 works normally; if the diffuser 3 is damaged, the closed space When connected to the outside world, the metal shrapnel structure 6 is in the second state, and the laser transmitter 1 stops working at this time, which can avoid the situation that the light emitted by the laser transmitter 1 causes damage to the human face.

In the embodiment of the present invention, as shown in FIG. 5 and FIG. 7 , the inner surface of the support body 5 is provided with a third pad 83 , and the laser transmitter 1 is welded on the third pad 83 .

A third pad 83 is provided on the inner surface of the support body 5 , and the position of the third pad 83 is opposite to the diffuser 3 . By welding the laser transmitter 1 to the third pad 83 , the laser transmitter can be 1 towards the diffuser, the laser emitted by the laser transmitter 1 can be emitted after the diffuser 3, so as to make full use of the diffuser 3 and prevent the light emitted by the laser transmitter 1 from causing damage to the face. The third pad 83 is connected to the metal traces in the support body 5 .

In the embodiment of the present invention, as shown in FIG. 5 and FIG. 7 , a slot 52 is provided at the position where the support body 5 is connected with the diffusion sheet 3 , and the diffusion sheet 3 is matched with the slot 52 .

A card slot 52 is provided at the top end of the support body 5 . When the diffusion sheet 3 is connected to the support body 5 , it can cooperate with the card slot 52 to realize the connection between the two. Among them, in order to ensure the firmness of the connection between the diffusion sheet 3 and the support body 5, glue can be arranged in the clamping groove 52 before the diffusion sheet 3 is matched with the clamping groove 52 to ensure the firmness of the connection between the two. Alternatively, a welding spot can also be provided in the card slot 52 to realize the welding between the card slot 52 and the diffusion sheet 3 .

In the embodiment of the present invention, the closed space is a vacuum space. By encapsulating the laser transmitter in the vacuum welding machine, the pressure difference between the closed space and the outside air pressure can be ensured, and the difference in the structure of the metal dome 6 can be easily controlled. state.

In the embodiment of the present invention, the support body 5 is made of ceramic material, and the diffusion sheet 3 is made of glass material. By arranging the ventilation holes 51 on the ceramic support body 5 and covering the ventilation holes 51 with the metal dome structure 6, the good heat dissipation effect of the metal sheet can be used to enhance the heat dissipation capability of the laser structure. The diffuser 3 is made of glass, which can modulate the laser light emitted by the laser transmitter 1, so as to prevent the light emitted by the laser transmitter 1 from causing damage to the face, and at the same time, it will not cause loss of the laser emission power.

In the laser structure provided by the embodiment of the present invention, the support body is provided with a vent hole, and the vent hole is covered with a metal dome structure, so that the support body, the metal dome structure and the diffuser located on the support body form a closed space, within the closed space Set up a laser transmitter, the laser emitted by the laser transmitter is emitted after the diffuser, and the air pressure in the enclosed space is lower than the external atmospheric pressure, so that the metal shrapnel structure can conduct the electrical connection between the laser transmitter and the driving circuit under the action of air pressure , when the closed space is connected to the outside world, the electrical connection between the laser transmitter and the driving circuit is disconnected, and the state of the metal shrapnel structure is controlled by airtight packaging, and then the work of the laser transmitter is controlled, which can protect the safety of human eyes. On the basis, the package size is guaranteed, the loss of transmit power is avoided, and the heat dissipation capability of the laser structure is enhanced.

An embodiment of the present invention also provides a mobile terminal, including the above-mentioned laser structure, by setting a ventilation hole on one end face of a support body of the laser structure, welding a metal dome structure, and encapsulating it by vacuuming, the metal dome is made under the state of external atmospheric pressure. The structure conducts the electrical connection between the driving circuit and the laser emitter. When the diffuser is damaged, the outside air enters the laser structure. Under the action of air pressure, the metal shrapnel structure can disconnect the electrical connection between the driving circuit and the laser emitter. Make the laser transmitter stop working, and then achieve the purpose of protecting the safety of human eyes.

An embodiment of the present invention also provides a laser transmitter packaging method, as shown in FIG. 8 , including:

Step 801 , providing a support body with ventilation holes.

Step 802 , welding the laser transmitter to the support body.

Step 803 , fixing a diffuser on the support, and the laser emitted by the laser transmitter is emitted through the diffuser.

Step 804 , covering the vent hole with the metal dome structure in an environment lower than the external atmospheric pressure, so that the diffuser, the support and the metal dome structure form a closed space.

Among them, when the air pressure in the closed space is lower than the external atmospheric pressure, the metal shrapnel structure conducts the electrical connection between the laser transmitter and the driving circuit, and when the closed space is connected to the outside world, the metal shrapnel structure disconnects the laser transmitter and the driver. Electrical connections between circuits.

The specific flow of the laser transmitter packaging according to the embodiment of the present invention is as follows:

First, as shown in FIG. 9 , a support body 5 is formed by a mold. The support body 5 is generally made of ceramic material, which can be formed by a mold, and there are metal wires inside the support body 5 . The support body 5 is in the shape of a round or square barrel without a cover, a vent hole 51 is provided on one end surface of the support body 5 , and a third pad 83 integrally connected is provided inside the support body 5 .

Before welding the laser transmitter into the support body, it is also necessary to set a first pad on the outer surface of the support body around the vent hole; set a second pad between the first pad and the vent hole; The pad and the second pad are connected in series in the driving loop.

10 , the first bonding pad 81 and the second bonding pad 82 are plated on the outer surface of the support body 5 with the ventilation holes 51 , wherein the first bonding pads 81 may be multiple and arranged around the ventilation holes 51 . A second pad 82 is arranged between the first pad 81 and the air hole 51 , and then the first pad 81 and the second pad 82 are arranged in the driving circuit.

Then, the laser transmitter is welded in the support body, and when the laser transmitter is welded in the support body, the specific process is: welding the laser transmitter on the third pad on the inner surface of the support body.

As shown in FIG. 11 , the laser transmitter 1 is welded to the third pad 83 on the inner surface of the bottom end of the support body 5 by welding, wherein the third pad 83 at the bottom end of the support body 5 is integrally connected with the support body 5 .

It should be noted that when the first pad and the second pad are connected in series in the driving circuit, the driving circuit here includes a laser transmitter and a driving circuit, and the first pad and the second pad are connected in series in the driving circuit Specifically, it includes: setting a first electrical pin at the first pad, and electrically connecting the first electrical pin with the laser transmitter through a driving circuit; setting a second electrical pin at the second pad, connecting the second electrical pin The pins are electrically connected to the laser transmitter.

Afterwards, a diffusing sheet is fixed on the supporting body, wherein the diffusing sheet is fixed on the upper end surface of the supporting body, at the position of the upper end cover of the barrel-shaped structure. The position of the diffuser is opposite to that of the laser emitter, so that the laser emitted by the laser emitter can be emitted after the diffuser, so as to make full use of the diffuser and prevent the light emitted by the laser emitter from causing damage to the face.

As shown in FIG. 12 , the diffusion sheet 3 is installed on the slot 52 of the support body 5 , and glue can be placed on the slot 52 before installation to ensure the firmness and effectiveness of the installation. Of course, the connection between the diffusion sheet 3 and the support body 5 can also be realized by welding.

Finally, the vent hole is covered with a metal dome structure in an environment lower than the outside atmospheric pressure, so that the diffuser, the support body and the metal dome structure form a closed space. The specific process of covering the metal dome structure at the vent hole in an environment lower than the external atmospheric pressure is as follows: in a vacuum environment, the metal dome structure is welded on the first pad. Among them, when the air pressure in the closed space is lower than the external atmospheric pressure, the metal dome structure is in contact with the second pad, and the electrical connection between the laser transmitter and the driving circuit is conducted; when the closed space is connected to the outside world, the metal dome structure is connected. Separated from the second pad, the electrical connection between the laser transmitter and the driving circuit is disconnected.

As shown in FIG. 5, FIG. 7 and FIG. 13, in a vacuum environment, the metal dome structure 6 is welded on the first pad 81 to cooperate with the support body 5 to seal the vent hole 51. Because of the packaging in a vacuum environment, the laser structure The internal air pressure is lower than the external ambient air pressure. When the laser structure is taken out from the vacuum welding machine, the metal shrapnel structure 6 will change from the outward drum (the state shown in Figure 7) to the inward drum (Figure 5). The state shown) is connected to the second pad 82 , and at this time, the metal dome structure 6 is in contact with the first pad 81 and the second pad 82 to realize the drive circuit connection.

Among them, if the diffuser 3 is damaged during the application process, the external air will enter the inside of the laser structure, and under the action of air pressure, the metal dome structure 6 will return to the shape of an outward bulge, and the second pad 82 will be broken. When the connection is opened, the driving circuit is disconnected, and the laser transmitter 1 stops working, which can achieve the purpose of protecting the safety of human eyes.

The laser transmitter packaging method provided by the embodiment of the present invention can realize the use of airtight packaging to control the state of the metal dome structure, and then control the operation of the laser transmitter. On the basis of protecting human eye safety, the packaging size can be guaranteed and the emission of The loss of power also enhances the heat dissipation capability of the laser structure.

The laser transmitter packaging method and laser structure provided by the embodiments of the present invention can also be applied to other laser devices with diffuser lenses, and further can be used in various mobile terminals with lasers, such as mobile phones, tablet computers, Personal digital processor, car computer, camera, laptop or navigator.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments may be referred to each other.

Although preferred embodiments of the embodiments of the present invention have been described, additional changes and modifications to these embodiments may be made by those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the embodiments of the present invention.

Finally, it should also be noted that in this document, relational terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply these entities or that there is any such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass non-exclusive inclusion, such that a process, method, article or terminal device comprising a list of elements includes not only those elements, but also a non-exclusive list of elements. other elements, or also include elements inherent to such a process, method, article or terminal equipment. Without further limitation, an element defined by the phrase "comprises a..." does not preclude the presence of additional identical elements in the process, method, article or terminal device comprising said element.

The above are the preferred embodiments of the present invention, and it should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications are also included in the present invention. within the scope of protection of the invention.

Claims (8)

1. A laser structure, comprising:

the support body is provided with a vent hole;

the metal elastic sheet structure covers the vent hole;

the diffusion sheet, the support body and the metal elastic sheet structure form a closed space, the air pressure in the closed space is smaller than the external atmospheric pressure, a laser emitter is arranged in the closed space, and the laser emitter faces the diffusion sheet;

when the air pressure in the closed space is smaller than the external atmospheric pressure, the metal elastic sheet structure is in a first state, and the electrical connection between the laser transmitter and the driving circuit is conducted; when the closed space is communicated with the outside, the metal elastic sheet structure is in a second state, and the electrical connection between the laser transmitter and the driving circuit is disconnected.

2. The laser structure of claim 1, wherein the outer surface of the support body is provided with a first pad surrounding the vent hole, and the metal dome structure is welded to the first pad and seals the vent hole;

a second bonding pad is arranged between the first bonding pad and the vent hole, the first bonding pad and the second bonding pad are connected in series in a driving circuit, and the driving circuit comprises the laser emitter and the driving circuit;

when the metal elastic sheet structure is in a first state, the metal elastic sheet structure is in contact with the second bonding pad; and when the metal elastic sheet structure is in a second state, the metal elastic sheet structure is separated from the second bonding pad.

3. The laser structure of claim 2, wherein the first pad is connected in series in the drive loop through a first electrical pin, and the second pad is connected in series in the drive loop through a second electrical pin;

the first electric pin, the driving circuit and the laser emitter are sequentially connected, and the second electric pin is electrically connected with the laser emitter.

4. The laser structure according to claim 1, characterized in that the inner surface of the support body is provided with a third pad, on which the laser emitter is soldered.

5. The laser structure as claimed in claim 1, wherein a locking groove is provided at a position where the support body is connected to the diffusion sheet, and the diffusion sheet is engaged with the locking groove.

6. The laser structure according to claim 1,

the enclosed space is a vacuum space.

7. The laser structure according to claim 1,

the support body is made of ceramic materials, and the diffusion sheet is made of glass materials.

8. A mobile terminal, characterized in that it comprises a laser structure according to any of claims 1 to 7.

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