CN217508812U - Terminal device - Google Patents

Abstract

The disclosure provides a terminal device, and belongs to the technical field of electronic devices. The terminal equipment comprises a shell, a display screen, a main board, an additional board, a light sensation transmitting device, a light sensation receiving device and an infrared lamp. The shell is connected with the display screen, and an accommodating space is formed between the shell and the display screen. The mainboard is located accommodation space's inside, and the additional plate is located the mainboard and towards one side of display screen. The light sensing emitting device and the light sensing receiving device are located on the side wall, facing the display screen, of the additional plate, and the infrared lamp is located on the side wall, back to the display screen, of the additional plate. The additional plate has been add in the terminal equipment that this disclosure provided, and additional plate and mainboard are piled up in the thickness direction and are arranged, and light sense transmitting device and light sense receiving device set up the one side at the additional plate, and the infrared lamp sets up the opposite side at the additional plate to, make full use of terminal equipment's thickness space, reduced the quantity of the electrical part of arranging on the mainboard, be favorable to arranging of antenna shell fragment at the mainboard.

Description

Terminal device

Technical Field

The disclosure relates to the technical field of electronic equipment, in particular to terminal equipment.

Background

Along with the development of terminal equipment such as mobile phones, the number of electric devices required to be arranged on a mainboard of the terminal equipment is more and more.

For example, after the terminal device enters the fifth Generation Mobile Communication Technology (5th Generation Mobile Communication Technology, 5G), the number of antennas on the top of the terminal device increases. Correspondingly, the number of the antenna shrapnels which need to be arranged on the top of the mainboard is increased, wherein the antenna shrapnels are used for being electrically connected with the antenna.

However, the top of the main board generally needs to be provided with a light sensing emitting device, a light sensing receiving device, an infrared lamp and the like, and the arrangement of the antenna shrapnel is not facilitated by the presence of the electric devices.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a terminal device, which can solve the technical problems existing in the related art, and the technical scheme of the terminal device is as follows:

the disclosure provides a terminal device, which comprises a shell, a display screen, a main board, an additional board, a light sensation transmitting device, a light sensation receiving device and an infrared lamp;

the shell is connected with the display screen, and an accommodating space is formed between the shell and the display screen;

the main board is positioned in the accommodating space, and the additional board is positioned on one side of the main board, which faces the display screen, and is electrically connected with the main board;

the light sensing emitting device and the light sensing receiving device are positioned on the side wall of the additional plate facing the display screen and are electrically connected with the additional plate;

the infrared lamp is located the additional plate dorsad the lateral wall of display screen, and with the additional plate electricity is connected.

In one possible implementation manner, the display screen includes a cover plate, a display module and a display module auxiliary material, which are stacked, and the cover plate extends out towards one side of the end wall of the housing relative to the display module and the display module auxiliary material;

the light sense emitting device is opposite to the cover plate relative to the display module and the part of the display module auxiliary material extending out;

the light sensation receiving device is opposite to the display module and the display module auxiliary material, and the part of the display module auxiliary material opposite to the light sensation receiving device is provided with an opening.

In one possible implementation, the additional plate protrudes toward the end wall side with respect to the main plate, and the infrared lamp is fixed to a portion of the additional plate that protrudes with respect to the main plate.

In one possible implementation, the additional board includes a flexible circuit board and a bracket;

the flexible circuit board comprises a first board body, a bent board body and a second board body which are connected in sequence;

the first plate body is fixed on the side wall of the support facing the display screen, and the second plate body is fixed on the side wall of the support facing away from the display screen;

the light sensation emitting device and the light sensation receiving device are fixed on the first plate body, and the infrared lamp is fixed on the second plate body.

In one possible implementation manner, the flexible circuit board further includes a connection board body;

one end of the connecting plate body is connected with one side of the second plate body, and the other end of the connecting plate body is electrically connected with the main board through a connector.

In a possible implementation manner, the connector is located on a side of the main board facing away from the display screen.

In one possible implementation, the additional plate further includes a first reinforcing plate and a second reinforcing plate;

the first reinforcing plate is connected with the surface of the first plate body, which is opposite to the light sensation emitting device and the light sensation receiving device, and is opposite to the light sensation emitting device and the light sensation receiving device;

the second reinforcing plate is connected with the surface of the second plate body, back to the infrared lamp, and is opposite to the infrared lamp.

In a possible implementation manner, the additional board is a printed circuit board, and the additional board and the main board are electrically connected through a spring piece.

In one possible implementation, the housing includes a middle frame and a lamp cover;

the middle frame is provided with a lampshade mounting groove and a light through hole, the bottom of the lampshade mounting groove is communicated with the light through hole, and the light through hole is opposite to the infrared lamp;

the lamp shade is located in the lamp shade mounting groove.

In one possible implementation manner, the middle frame is further provided with a decoration piece mounting groove, and the groove bottom of the decoration piece mounting groove is communicated with the opening of the lampshade mounting groove;

the casing still includes the decoration, the decoration has the light transmissivity, the decoration is located in the decoration mounting groove, and seals the lamp shade mounting groove.

The technical scheme provided by the disclosure at least comprises the following beneficial effects:

the utility model provides a terminal equipment, terminal equipment's inside has add the additional plate, and additional plate and mainboard are piled up in terminal equipment's thickness direction and are arranged, and light sense transmitting device and light sense receiving device set up the one side at the additional plate, and the infrared lamp sets up the opposite side at the additional plate to, make full use of terminal equipment's thickness space, reduced the quantity of the electrical part of arranging on the mainboard, be favorable to arranging of antenna shell fragment at the mainboard.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. In the drawings:

fig. 1 is a schematic cross-sectional view of a top portion of a terminal device provided by an embodiment of the present disclosure;

fig. 2 is a partial schematic view of a top portion of a terminal device provided by an embodiment of the disclosure;

fig. 3 is a partial schematic view of a top portion of a terminal device provided by an embodiment of the present disclosure;

FIG. 4 is a schematic diagram of an add-on board and an electrical device provided by an embodiment of the present disclosure;

fig. 5 is a schematic diagram of a flexible circuit board and an electrical device provided by an embodiment of the present disclosure;

FIG. 6 is a schematic view of a stent provided by embodiments of the present disclosure;

fig. 7 is a schematic cross-sectional view of a top portion of a terminal device provided by an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of an add-on board and an electrical device provided by an embodiment of the present disclosure;

fig. 9 is an exploded view of the top of a terminal device provided by an embodiment of the present disclosure;

fig. 10 is an exploded view of the top of a terminal device provided by an embodiment of the present disclosure;

fig. 11 is a partial schematic view of a top portion of a terminal device provided by an embodiment of the present disclosure.

Illustration of the drawings:

1. the lamp comprises a shell, 11, a middle frame, 110, end walls, 111, a lampshade mounting groove, 112, a light through hole, 113, a decoration mounting groove, 12, a lampshade, 13, a decoration, 14 and a bottom cover;

2. the display screen 21, the cover plate 22, the display module 23, the display module auxiliary materials 230 and the hole;

3. a main board;

4. an additional plate 41, a flexible circuit board 411, a first plate 412, a bent plate 413, a second plate 414, a connecting plate 42, a support 43, a connector 44, a spring sheet 45, a first reinforcing plate 46, a second reinforcing plate 47 and a third reinforcing plate;

5. a light sensitive emitting device;

6. a light-sensing receiving device;

7. an infrared lamp;

8. sealing the foam;

9. compressing the rubber;

a. a first back adhesive, b, a second back adhesive.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

The terminology used in the description of the embodiments of the present disclosure is for the purpose of describing the embodiments of the present disclosure only and is not intended to be limiting of the present disclosure. Unless otherwise defined, technical or scientific terms used in the embodiments of the present disclosure should have the ordinary meaning as understood by those having ordinary skill in the art to which the present disclosure belongs. The use of "first," "second," and similar terms in the description and claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes. "plurality" means two or more unless explicitly defined otherwise.

The disclosed embodiment provides a terminal device, as shown in fig. 1, the terminal device includes a housing 1, a display screen 2, a main board 3, an additional board 4, a light sense emitting device 5, a light sense receiving device 6, and an infrared lamp 7. The casing 1 is connected with the display screen 2, and an accommodating space is formed between the casing 1 and the display screen 2. The main board 3 is located inside the accommodating space, and the additional board 4 is located on one side of the main board 3 facing the display screen 2 and electrically connected with the main board 3. The light-sensing emitting device 5 and the light-sensing receiving device 6 are located on the side wall of the additional plate 4 facing the display screen 2 and are electrically connected to the additional plate 4. The infrared lamp 7 is located on the side wall of the additional plate 4 opposite to the display screen 2 and is electrically connected with the additional plate 4.

The housing 1 is a structural member of the terminal device, and is used for supporting and protecting other components. In some examples, as shown in fig. 1, the housing 1 includes a middle frame 11, a lamp cover 12, a decoration 13, and a bottom cover 14, the bottom cover 14 closes a side of the middle frame 11 away from the display screen 2, and the lamp cover 12 and the decoration 13 are fixed to the middle frame 11.

The display screen 2 is used to implement a display function, and in some examples, the display screen 2 is a touch screen. In some examples, the display 2 is adhered to the housing 1, for example, the display 2 is adhered to the housing 1 (the middle frame 11) by caulking.

The main board 3 is used for carrying electrical devices, such as an antenna dome, a processor, and the like.

The additional board 4 is a newly added circuit board and is stacked and arranged with the main board 3 in the thickness direction of the terminal device. The additional plate 4 is used to carry electrical components.

The light sensing emitting device 5 and the light sensing receiving device 6 are located on one side of the additional plate 4 and are used for achieving automatic brightness adjustment, screen turn-off function and the like of the terminal device. In some examples, the light-sensing transmitting device 5 and the light-sensing receiving device 6 are pasted on the additional plate 4. The light-sensing emission device 5 may also be referred to as a light-sensing emission lamp.

The infrared lamp 7 is positioned at the other side of the additional plate 4 and is used for emitting infrared light so as to realize the remote control function of the terminal equipment. In some examples, the infrared lamp 7 is glued to the additional plate 4.

The technical scheme that this disclosed embodiment provided, add addition board 4 in terminal equipment's inside, addition board 4 and mainboard 3 pile up in terminal equipment's thickness direction and arrange, and light sense transmitting device 5 and light sense receiving device 6 set up the one side at addition board 4, infrared lamp 7 sets up the opposite side at addition board 4, thereby, make full use of terminal equipment's thickness space, the quantity of the electrical part of arranging on the mainboard 3 has been reduced, be favorable to arranging of electrical parts such as antenna shrapnel at mainboard 3.

In some examples, as shown in fig. 1, the display screen 2 includes a cover plate 21, a display module 22, and a display module auxiliary material 23, which are stacked, and the cover plate 21 protrudes toward the end wall 110 of the housing 1 relative to the display module 22 and the display module auxiliary material 23. The light sensing emitting device 5 is opposite to the protruding part of the cover plate 21 relative to the display module 22 and the display module auxiliary material 23. The light-sensitive receiving device 6 is opposite to the display module 22 and the display module auxiliary material 23, and the portion of the display module auxiliary material 23 opposite to the light-sensitive receiving device 6 is provided with an opening 230.

The cover plate 21 may be a glass cover plate for protecting the display module 22.

The Display module 22 is used to realize a Display function, and may be an Organic Light-Emitting Diode (OLED) module or a Liquid Crystal Display (LED) module.

The display module auxiliary material 23 is used for supporting the display module 22, and in some examples, the display module auxiliary material 23 includes copper foil, Polyimide (PI), foam, and the like. The auxiliary material 23 of the display module is opaque, so that the light-sensitive receiving device 6 can normally receive light, the portion of the auxiliary material 23 of the display module opposite to the light-sensitive receiving device 6 needs to be opened, for example, an opening is formed in a copper foil of the auxiliary material 23 of the display module.

The end wall 110 may refer to a top wall of the housing 1, and the end wall 110 may be located on the middle frame 11.

It can be understood that the cover plate 21 extends out towards the end wall 110 of the housing 1 relative to the display module 22 and the display module auxiliary material 23, a gap (or referred to as a narrow slit) is formed between the display module 22, the display module auxiliary material 23 and the end wall 110, the light sensing emitting device 5 is disposed corresponding to the gap, and the light emitted by the light sensing emitting device 5 can exit through the gap and the cover plate 21. The arrangement mode of the shape is called narrow slit light sensation or half-screen light sensation.

The arrangement form of the light sensing emitting device 5 and the light sensing receiving device 6 both located below the display module 22 and the display module auxiliary material 23 is called light sensing under the screen. The arrangement of light sensation under the screen requires that the display module auxiliary material 23 is provided with holes corresponding to the light sensation emitting device 5 and the light sensation receiving device 6.

According to the technical scheme provided by the embodiment of the disclosure, the light sensing emitting device 5 and the light sensing receiving device 6 are arranged on the additional plate 4 instead of being arranged in the middle or the bottom of the main plate 3 and other areas to avoid the antenna elastic sheet, so that light sensing (narrow slit light sensing) under a half screen can be realized, and the cost of the terminal equipment is reduced.

In some examples, as shown in fig. 1, the additional plate 4 protrudes toward the end wall 110 with respect to the main plate 3, and the infrared lamp 7 is fixed to a portion of the additional plate 4 that protrudes with respect to the main plate 3.

That is, infrared lamp 7 staggers with mainboard 3 to, infrared lamp 7 can not take place to interfere with the electrical part of arranging on the mainboard 3, does benefit to arranging of electrical part (like the antenna shrapnel) on the mainboard 3 more.

In some examples, as shown in fig. 1 and 2, in order to avoid crosstalk between the light sensing emitting device 5 and the light sensing receiving device 6 and affect the light sensing function, the light sensing emitting device 5 and the light sensing receiving device 6 may be separated by a sealing foam 8.

Illustratively, as shown in fig. 1 and 2, the sealing foam 8 surrounds the light-receiving device 6, and the sealing foam 8 is compressed between the housing 1 and the display screen 2. Wherein, the display screen 2 is hidden in fig. 2 so as to display the sealing foam 8.

In the following, an implementation of the add-on board 4 is exemplarily described:

in some examples, as shown in fig. 3 to 6, the add-on board 4 includes a Flexible Printed Circuit (FPC) board 41 and a bracket 42. The flexible circuit board 41 includes a first board 411, a bent board 412, and a second board 413 connected in sequence. The first board 411 is fixed to a side wall of the bracket 42 facing the display 2, and the second board 413 is fixed to a side wall of the bracket 42 facing away from the display 2. The light-sensing transmitting device 5 and the light-sensing receiving device 6 are fixed to the first plate 411, and the infrared lamp 7 is fixed to the second plate 413.

According to the technical scheme provided by the embodiment of the disclosure, the flexible circuit board 41 is bent and fixed on the support 42, so that the flexible circuit board 41 has two opposite side walls, and thus, the two sides of the flexible circuit board 41 are respectively connected with the light sensing emitting device 5, the light sensing receiving device 6 and the infrared lamp 7.

The connection manner of the flexible circuit board 41 and the main board 3 is not limited in the embodiments of the present disclosure, and in some examples, as shown in fig. 3 to 5, the flexible circuit board 41 further includes a connection board 414, one end of the connection board 414 is connected to one side of the second board 413, and the other end is electrically connected to the main board 3 through the connector 43.

The connector 43 may be a Board-To-Board (BTB) connector.

According to the technical scheme provided by the embodiment of the disclosure, the connecting plate 414 is connected with the main board 3 through the connector 43, and compared with the connection through the elastic sheet, the area of the main board 3 is saved.

In some examples, as shown in fig. 1, 4 and 5, the connector 43 is located on a side of the motherboard 3 facing away from the display screen 2.

Illustratively, as shown in fig. 3 to 5, the connecting plate 414 is bent into a U-shape, and a portion of the main plate 3 extends into the connecting plate 414.

Since the flexible circuit board 41 has poor rigidity, it is inconvenient to connect the light sensing transmitting device 5 and the light sensing receiving device 6 to the flexible circuit board 41. To facilitate connection, in some examples, as shown in fig. 4 and 5, the additional plate 4 further includes a first reinforcing plate 45, and the first reinforcing plate 45 is connected to a surface of the first plate body 411 facing away from the light-sensation transmitting device 5 and the light-sensation receiving device 6, and is opposite to the light-sensation transmitting device 5 and the light-sensation receiving device 6.

In this way, the first reinforcing plate 45 enhances the rigidity of the portion of the first plate body 411 for connecting the light sensation transmitting device 5 and the light sensation receiving device 6, thereby facilitating the connection of the light sensation transmitting device 5 and the light sensation receiving device 6 with the flexible circuit board 41.

Accordingly, in order to facilitate the connection of the infrared lamp 7 to the flexible circuit board 41, in some examples, as shown in fig. 4 and 5, the additional plate 4 further includes a second reinforcing plate 46, and the second reinforcing plate 46 is connected to a surface of the second plate body 413 facing away from the infrared lamp 7 and is opposite to the infrared lamp 7.

In this way, the second reinforcing plate 46 reinforces the rigidity of the portion of the second plate body 413 to which the infrared lamp 7 is connected, thereby facilitating the connection of the infrared lamp 7 to the flexible circuit board 41.

Accordingly, in order to facilitate the connection of the connector 43 to the connecting plate body 414, in some examples, as shown in fig. 4 and 5, the additional plate 4 further includes a third reinforcing plate 47, and the third reinforcing plate 47 is connected to a surface of the connecting plate body 414 facing away from the connector 43 and opposite to the connector 43.

In this way, the third reinforcing plate 47 enhances the rigidity of the portion of the connecting plate body 414 for connection with the connector 43, thereby facilitating the connection of the connector 43 with the flexible circuit board 41.

The first reinforcing plate 45, the second reinforcing plate 46, and the third reinforcing plate 47 may be a metal plate, a plastic plate, an acrylic plate, or the like, and the specific type thereof is not limited in the embodiment of the present disclosure.

In order to make the additional board 4 more stable inside the terminal device, in some examples, as shown in fig. 1, the terminal device further has a pressing rubber (rubber)9, the pressing rubber 9 is located between the main board 3 and the additional board 4, and the pressing rubber 9 presses the additional board 4 against the middle frame 11.

In addition to the above-described implementation including the flexible Circuit Board 41 and the bracket 42, in other examples, as shown in fig. 7 and 8, the additional Board 4 may also be a Printed Circuit Board (PCB).

That is, the additional board 4 is a rigid circuit board.

In some examples, as shown in fig. 7, the printed circuit board is electrically connected to the motherboard 3 through the spring piece 44, and the spring piece 44 is located between the printed circuit board and the motherboard 3.

In order to allow the light emitted by the infrared lamp 7 to be transmitted out of the housing 1, a portion of the housing 1 opposite to the infrared lamp 7 should have a light-transmitting portion. The embodiment of the present disclosure is not limited to the implementation of the light-transmitting portion, and the following description is exemplary:

in some examples, as shown in fig. 9 and 10, the housing 1 includes a middle frame 11 and a lamp cover 12, the middle frame 11 having a cover mounting groove 111 and a light passing hole 112, a groove bottom of the cover mounting groove 111 communicating with the light passing hole 112, and the light passing hole 112 opposing the infrared lamp 7. The lamp housing 12 is positioned in the housing installation groove 111.

According to the technical scheme provided by the embodiment of the disclosure, the lampshade mounting groove 111 is arranged on the outer side of the light through hole 112, so that the lampshade 12 cannot interfere with an electric device (such as the infrared lamp 7) inside the middle frame 11, and the position design of the infrared lamp 7 is more flexible.

In some examples, the middle frame 11 has two parts, namely a metal part located at the inner layer and a plastic part located at the outer layer, wherein the metal part plays a main role in the strength of the middle frame 11.

In some examples, the cover mounting groove 111 is located at the plastic part, and the light passing hole 112 is located at the metal part. Thus, the strength of the metal part is less weakened, and the influence of the mounting structure of the cover 12 on the strength of the center frame 11 is reduced.

In some examples, as shown in fig. 9 and 10, the lamp cover 12 is stuck to the bottom of the cover mounting groove 111 by the first adhesive a.

In some examples, as shown in fig. 9 to 11, the middle frame 11 further has a garnish mounting groove 113, and a groove bottom of the garnish mounting groove 113 communicates with an opening of the cover mounting groove 111. The housing 1 further includes a garnish 13, the garnish 13 having a light-transmitting property, the garnish 13 being located in the garnish mounting groove 113 and closing the lamp-cover mounting groove 111.

Since the garnish 13 has light transmittance, the garnish 13 needs to be made of a light-transmitting material. The specific type of the light-transmitting material is not limited in the embodiments of the present disclosure, and in some examples, the material of the decoration 13 is PC + PMMA, which can achieve an infrared light transmittance greater than 85% at a wavelength of 940 nm.

The technical scheme that this disclosed embodiment provided has the light transmissivity through setting up decoration 13 for need not set up logical unthreaded hole at decoration 13, thereby, make decoration 13 can seal the opening of lamp shade mounting groove 111, casing 1's waterproof performance is better, does not need additional design waterproof construction, can satisfy waterproof requirement.

In addition, since no additional waterproof structure is required to be designed, the strength of the middle frame 11 is not lost due to the design of the waterproof structure.

In some examples, as shown in fig. 9 and 10, the deco 13 is stuck to the groove bottom of the deco mounting groove 113 by the second back adhesive b.

The attachment mode in which the opening of the shade attachment groove 111 faces the outside of the center frame 11 may be referred to as an exterior attachment mode. That is, the globe 12 needs to be attached from the outside of the center frame 11.

In other examples, as shown in fig. 7, the lampshade 12 may be mounted to the center frame 11 in an internal manner.

The above description is intended only to illustrate the preferred embodiments of the present disclosure, and not to limit the present disclosure, and any modifications, equivalents, improvements, etc. made within the principle of the present disclosure should be included in the scope of the present disclosure.

Claims (10)

1. A terminal device is characterized by comprising a shell (1), a display screen (2), a main board (3), an additional board (4), a light sensation transmitting device (5), a light sensation receiving device (6) and an infrared lamp (7);

the shell (1) is connected with the display screen (2), and an accommodating space is formed between the shell (1) and the display screen (2);

the main board (3) is positioned in the accommodating space, and the additional board (4) is positioned on one side of the main board (3) facing the display screen (2) and is electrically connected with the main board (3);

the light sensing emitting device (5) and the light sensing receiving device (6) are positioned on the side wall of the additional plate (4) facing the display screen (2) and are electrically connected with the additional plate (4);

the infrared lamp (7) is located the additional plate (4) is towards the lateral wall of display screen (2) dorsad, and with the additional plate (4) electricity is connected.

2. The terminal device according to claim 1, wherein the display screen (2) comprises a cover plate (21), a display module (22) and a display module auxiliary material (23) which are arranged in a stacked manner, and the cover plate (21) extends out towards one side of the end wall (110) of the shell (1) relative to the display module (22) and the display module auxiliary material (23);

the light sense emitting device (5) is opposite to the extending part of the cover plate (21) relative to the display module (22) and the display module auxiliary material (23);

the light sensation receiving device (6) is opposite to the display module (22) and the display module auxiliary material (23), and the part of the display module auxiliary material (23) opposite to the light sensation receiving device (6) is provided with an opening (230).

3. A terminal device according to claim 2, characterized in that the additional board (4) projects towards the side of the end wall (110) with respect to the main board (3), and the infrared lamp (7) is fixed to the portion of the additional board (4) projecting with respect to the main board (3).

4. A terminal device according to any of claims 1-3, characterized in that the additional board (4) comprises a flexible circuit board (41) and a bracket (42);

the flexible circuit board (41) comprises a first board body (411), a bent board body (412) and a second board body (413) which are sequentially connected;

the first plate body (411) is fixed on the side wall, facing the display screen (2), of the support (42), and the second plate body (413) is fixed on the side wall, facing away from the display screen (2), of the support (42);

the light sensation emitting device (5) and the light sensation receiving device (6) are fixed on the first plate body (411), and the infrared lamp (7) is fixed on the second plate body (413).

5. The terminal device according to claim 4, characterized in that the flexible circuit board (41) further comprises a connection board body (414);

one end of the connecting plate body (414) is connected with one side of the second plate body (413), and the other end of the connecting plate body is electrically connected with the main board (3) through a connector (43).

6. A terminal device according to claim 5, characterized in that the connector (43) is located on the side of the main board (3) facing away from the display screen (2).

7. A terminal device according to claim 4, characterized in that the additional plate (4) further comprises a first stiffening plate (45) and a second stiffening plate (46);

the first reinforcing plate (45) is connected with the surface, opposite to the light sensation emitting device (5) and the light sensation receiving device (6), of the first plate body (411), and is opposite to the light sensation emitting device (5) and the light sensation receiving device (6);

the second reinforcing plate (46) is connected with the surface of the second plate body (413) opposite to the infrared lamp (7), and is opposite to the infrared lamp (7).

8. A terminal device according to any one of claims 1-3, characterized in that the additional board (4) is a printed circuit board, and the additional board (4) and the main board (3) are electrically connected by a spring plate (44).

9. A terminal device according to any of claims 1-3, characterized in that the housing (1) comprises a middle frame (11) and a lamp shade (12);

the middle frame (11) is provided with a lampshade mounting groove (111) and a light through hole (112), the bottom of the lampshade mounting groove (111) is communicated with the light through hole (112), and the light through hole (112) is opposite to the infrared lamp (7);

the lamp shade (12) is positioned in the lamp shade mounting groove (111).

10. The terminal device according to claim 9, wherein the middle frame (11) further has a garnish mounting groove (113), a groove bottom of the garnish mounting groove (113) communicating with an opening of the cover mounting groove (111);

the housing (1) further comprises a decoration (13), the decoration (13) has light transmittance, and the decoration (13) is located in the decoration mounting groove (113) and closes the lampshade mounting groove (111).

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