CN108922398B - Mobile terminal - Google Patents
Mobile terminal Download PDFInfo
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- CN108922398B CN108922398B CN201810839644.8A CN201810839644A CN108922398B CN 108922398 B CN108922398 B CN 108922398B CN 201810839644 A CN201810839644 A CN 201810839644A CN 108922398 B CN108922398 B CN 108922398B
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- convex lens
- infrared light
- screen cover
- mobile terminal
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- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000003292 glue Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/4204—Photometry, e.g. photographic exposure meter using electric radiation detectors with determination of ambient light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Telephone Set Structure (AREA)
- Telephone Function (AREA)
Abstract
The invention discloses a mobile terminal, which comprises a shell with a middle frame, a screen cover plate, a circuit board, an infrared photosensitive sensor, a first plano-convex lens and a second plano-convex lens, wherein the screen cover plate is fixed on the middle frame, the circuit board, the screen cover plate and the middle frame form an accommodating space, the infrared photosensitive sensor is positioned in the accommodating space and is arranged on the circuit board, the infrared photosensitive sensor comprises an infrared light emitting part and an infrared light receiving part which are all towards the screen cover plate, the first plano-convex lens is arranged between the infrared light emitting part and the screen cover plate, the second plano-convex lens is arranged between the infrared light receiving part and the screen cover plate, the convex surface side of the first plano-convex lens faces the infrared light emitting part, and the convex surface side of. Above-mentioned scheme can solve present infrared photosensitive sensor and adopt cushion or folding FPC to support there is the relatively poor problem of stability.
Description
Technical Field
The invention relates to the technical field of mobile terminal design, in particular to a mobile terminal.
Background
At present, with the improvement of user requirements, the functions of the mobile terminal are more and more, and accordingly, a plurality of functional devices are integrated on the mobile terminal, and an infrared photosensitive sensor is one of the functional devices. The infrared photosensitive sensor is a sensor for measuring by using physical characteristics of infrared rays, and can acquire the brightness of the environment where the mobile terminal is located, so that the control module in the mobile terminal controls the brightness of the screen according to the brightness of the environment where the mobile terminal is located, and finally, the infrared photosensitive sensor can be conveniently used by a user. In the adjusting process, when the environment where the mobile terminal is located is dark, the signal acquired by the infrared photosensitive sensor can enable the control module to reduce the brightness of the screen, and when the environment where the mobile terminal is located is bright, the signal acquired by the infrared photosensitive sensor can enable the control module to improve the brightness of the screen. The adjustment can enable the mobile terminal to match the adaptive brightness according to the environment, and the use of a user is facilitated.
In the working process, the infrared photosensitive sensor emits infrared light to the environment and then receives the infrared light reflected back from the environment, so that the subsequent analysis process is realized. Generally, the infrared photosensor is disposed in a space below the screen cover, and in order to improve detection accuracy, the smaller the distance from the screen cover, the better.
At present, the infrared photosensitive sensor is arranged at the bottom of an accommodating space formed by the screen cover plate and the shell, and the accommodating space is deep, so that the distance from the infrared photosensitive sensor to the screen cover plate is large, the projection area of infrared light and the area for receiving the infrared light are small, and finally the detection precision of the infrared photosensitive sensor is low. In order to improve the detection accuracy, it is a common practice in the industry to pad a supporting block or a folded FPC (i.e. a flexible circuit board) at the bottom of the accommodating space, so as to increase the height of the infrared photosensitive device, and this way can reduce the distance between the infrared photosensitive device and the screen cover plate by the way of padding.
However, the infrared photosensitive sensor has a stability problem under the support of the support block or the folded FPC, and when the mobile terminal is vibrated, the support block or the folded FPC can affect the support of the infrared photosensitive sensor, so that the tin is cracked to cause the electrical connection failure of the infrared photosensitive sensor.
Disclosure of Invention
The invention discloses a mobile terminal, which aims to solve the problem that the stability of the existing infrared photosensitive sensor is poor due to the fact that the infrared photosensitive sensor is supported by a cushion block or a folded FPC.
In order to solve the problems, the invention adopts the following technical scheme:
a mobile terminal comprises a shell with a middle frame, a screen cover plate, a circuit board, an infrared photosensitive sensor, a first plano-convex lens and a second plano-convex lens, the screen cover plate is fixed on the middle frame, the circuit board, the screen cover plate and the middle frame form an accommodating space, the infrared photosensitive sensor is positioned in the accommodating space and arranged on the circuit board, the infrared photosensitive sensor comprises an infrared light emitting part and an infrared light receiving part which both face the screen cover plate, the first plano-convex lens is disposed between the infrared light emitting part and the screen cover plate, the second plano-convex lens is disposed between the infrared light receiving part and the screen cover plate, the convex surface side of the first plano-convex lens faces the infrared light emitting portion, and the convex surface side of the second plano-convex lens faces the infrared light receiving portion.
The technical scheme adopted by the invention can achieve the following beneficial effects:
the mobile terminal disclosed by the invention is respectively provided with the first plano-convex lens and the second plano-convex lens for the infrared light emitting part and the infrared light receiving part, and the purposes of increasing the projection area of infrared light and increasing the receiving area of infrared light can be achieved on the premise of not increasing the height of the infrared photosensitive sensor in the accommodating space through the light divergence and convergence performance of the first plano-convex lens and the second plano-convex lens. Under this kind of circumstances, infrared photosensitive sensor can direct mount on the circuit board, and mobile terminal need not to dispose supporting shoe or folding FPC for infrared photosensitive sensor, just does not have infrared photosensitive sensor to increase the problem that the back electricity connection receives mobile terminal's vibrations influence easily yet.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a partial schematic view of a mobile terminal according to an embodiment of the disclosure;
FIGS. 2 and 3 are enlarged schematic views of a portion of the structure of FIG. 1;
fig. 4 is a schematic diagram of the effect of a plano-convex lens on light.
Description of reference numerals:
100-shell, 110-middle frame, 111-support platform, 200-screen cover plate, 300-circuit board, 400-infrared photosensitive sensor, 410-infrared light emitting part, 420-infrared light receiving part, 500-first plano-convex lens, 510-lapping platform, 600-second plano-convex lens, 610-lapping platform, 700-containing space.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 4, an embodiment of the invention discloses a mobile terminal including a housing 100, a screen cover 200, a circuit board 300, an infrared photosensor 400, a first plano-convex lens 500, and a second plano-convex lens 600.
The housing 100 generally has a middle frame 110, and the screen cover 200 is a part of a display module of the mobile terminal, and the display module includes a display screen and the screen cover 200 covering the display screen. The screen cover 200 is a light-transmissive cover. In one embodiment, the screen cover 200 may be a glass cover.
The Circuit Board 300 is generally a PCB (Printed Circuit Board), and the mobile terminal is generally disposed with more than one Circuit Board, in this embodiment, the Circuit Board 300 may be a main Board of the mobile terminal or a sub-Board of the mobile terminal. The infrared photosensor 400 is disposed on the circuit board 300, in this embodiment, the infrared photosensor 400 is directly fixed on the circuit board 300, and the circuit board 300 can provide power and control signals for the infrared photosensor 400.
The screen cover 200 is fixed on the middle frame 110, the circuit board 300 is located inside the casing 100, the screen cover 200, the circuit board 300 and the middle frame 110 form an accommodating space 700, and the infrared photosensitive sensor 400 is located in the accommodating space 700.
The infrared photosensor 400 includes an infrared light emitting part 410 and an infrared light receiving part 420 both facing the screen cover 200, that is, infrared light emitted from the infrared light emitting part 410 is transmitted through the screen cover 200 and then projected into the environment where the mobile terminal is located; the infrared light receiving unit 420 receives the infrared light emitted by the infrared light emitting unit 410 and reflected by the environment, and the infrared light in the environment is transmitted through the screen cover 200 and then received by the infrared light receiving unit 420 for subsequent analysis. The amount of infrared light emitted by the infrared light emitting part 410 and the amount of infrared light received by the infrared light receiving part 420 are analyzed subsequently to obtain the brightness of the environment where the mobile terminal is located.
The first plano-convex lens 500 is disposed between the infrared light emitting part 410 and the screen cover 200, and the second plano-convex lens 600 is disposed between the infrared light receiving part 420 and the screen cover 200. The first plano-convex lens 500 and the second plano-convex lens 600 are generally fixed to the housing 100 in a fixed manner. The first plano-convex lens 500 and the second plano-convex lens 600 each include a convex side and a planar side.
In the present embodiment, the convex surface side of the first plano-convex lens 500 faces the infrared light emitting part 410, and the convex surface side of the second plano-convex lens 600 faces the infrared light receiving part 420. Referring to fig. 4, during operation, the infrared light emitted from the infrared light emitting portion 410 enters from the convex side of the first plano-convex lens 500, passes through the first plano-convex lens 500 to form a focus point, and then is further diffused into the environment by the focus point, so as to increase the infrared light emitting area. Also, according to the reversibility of light, infrared light in the environment enters from the plane side of the second planoconvex lens 600, passes through the second planoconvex lens 600, and is collected in the infrared light receiving section 420, and finally, the reception of infrared light is achieved, and the optical path change is opposite to that shown in fig. 4, and infrared light can be received from a large space in the environment.
It is apparent that the first plano-convex lens 500 can increase the area of the infrared light emitted from the infrared light emitting part 410 projected into the environment, and the second plano-convex lens 600 can increase the area of the infrared light receiving part 420 receiving the infrared light from the environment. The increase of the area of the projection light of the infrared light emitting part 410 and the increase of the area of the infrared light receiving part 420 for receiving the infrared light improve the detection accuracy of the infrared photosensor 400, and finally make the ambient brightness obtained after the subsequent analysis more accurate. The plano-convex lens is a well-known optical device, and in the optical field, a person skilled in the art can adjust the positions of the first plano-convex lens 500 and the second plano-convex lens 600 so as to correspond to the infrared light emitting part 410 and the infrared light receiving part 420, respectively.
In the background art, the height of the infrared photosensor in the accommodating space is increased by the supporting block or the folded FPC, so as to increase the projection area of the infrared photosensor and the receiving area of the infrared photosensor, but the mobile terminal disclosed in the embodiment of the present invention is configured with the first plano-convex lens 500 and the second plano-convex lens 600 for the infrared light emitting portion 410 and the infrared light receiving portion 420, respectively, and the purpose of increasing the projection area of the infrared light and the receiving area of the infrared light can be achieved by the light divergence and convergence performance of the first plano-convex lens 500 and the second plano-convex lens 600 without increasing the height of the infrared photosensor 400 in the accommodating space 700. In this case, the infrared photosensor 400 can be directly mounted on the circuit board 300, and the mobile terminal does not need to configure a supporting block or a folded FPC for the infrared photosensor 400, and thus there is no problem that the electrical connection of the infrared photosensor 400 is easily affected by the vibration of the mobile terminal after the infrared photosensor 400 is heightened.
In order to improve the assembling stability and also to allow the first plano-convex lens 500 and the second plano-convex lens 600 to correspond to a larger space in the environment, the planar side of the first plano-convex lens 500 is attached to the screen cover 200, and the planar side of the second plano-convex lens 600 is attached to the screen cover 200. Of course, in order to further improve the stability of the assembly, the planar sides of the first plano-convex lens 500 and the second plano-convex lens 600 may be adhesively fixed with the screen cover 200 by optical glue, and the arrangement of the optical glue does not affect the projection of the infrared light.
Generally, the infrared light emitting part 410 can emit light in a small emitting space, and the infrared light receiving part 420 can obtain infrared light in a large range in the environment in consideration of a large distribution area of the infrared light after refraction in the environment, thereby improving the accuracy of the subsequent analysis. Based on this, in a preferred scheme, the light transmission area of the first plano-convex lens 500 may be smaller than the light transmission area of the second plano-convex lens 600. The light transmission area of the first plano-convex lens 500 is the projection area of the first plano-convex lens 500 in the light transmission direction, and the light transmission area of the second plano-convex lens 600 is the projection area of the second plano-convex lens 600 in the light transmission direction.
The first plano-convex lens 500 and the second plano-convex lens 600 can be installed in the accommodating space 700 in various ways, and specifically, the first plano-convex lens 500 and the second plano-convex lens 600 can be fixed in the accommodating space 700 by a connector (e.g., a threaded connector, a glue layer), but of course, the first plano-convex lens 500 and the second plano-convex lens 600 can also be fixed in the accommodating space 700 by a connecting structure.
In a specific embodiment, the inner wall of the middle frame 110 has a support base 111, the edge of the convex side of the first plano-convex lens 500 has a landing 510, the edge of the convex side of the second plano-convex lens 600 has a landing 610, the landing 510 of the first plano-convex lens 500 is on the support base 111, and the landing 610 of the second plano-convex lens 600 is on the support base 111.
In a preferable scheme, both the first plano-convex lens 500 and the second plano-convex lens 600 can be clamped and fixed between the support platform 111 and the screen cover plate 200, and the assembly structure can improve the assembly stability of the first plano-convex lens 500 and the second plano-convex lens 600, and simultaneously can enable the first plano-convex lens 500 and the second plano-convex lens 600 to be closer to the screen cover plate 200, so that the detection accuracy of the infrared photosensitive sensor 400 can be further improved.
Also, in order to facilitate the assembly of the first plano-convex lens 500 and the second plano-convex lens 600, the first plano-convex lens 500 and the second plano-convex lens 600 may be a unitary lens in a preferred embodiment. Of course, the first plano-convex lens 500 and the second plano-convex lens 600 can be fixed by gluing. In this case, in the assembling process, the operator can achieve the synchronous mounting of the first plano-convex lens 500 and the second plano-convex lens 600, which can reduce the number of operation steps and thus can improve the mounting efficiency.
In the embodiment of the present invention, the infrared light emitting part 410 and the infrared light receiving part 420 are fixedly connected, in this case, an operator can install the whole infrared photosensor 400 with less operations, and the operation is simple and the assembly efficiency is high. Specifically, the infrared light emitting part 410 and the infrared light receiving part 420 may be mounted on the circuit board 300 by soldering.
The mobile terminal disclosed by the embodiment of the invention can be a mobile phone, a tablet computer, an electronic book reader, an MP3 player or a wearable intelligent device. The embodiment of the invention does not limit the specific type of the mobile terminal.
In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (7)
1. A mobile terminal comprising a housing (100) having a center frame (110), a screen cover (200), a circuit board (300), an infrared sensor (400), a first plano-convex lens (500) and a second plano-convex lens (600), the screen cover (200) being fixed on the center frame (110), the circuit board (300), the screen cover (200) and the center frame (110) forming an accommodating space (700), the infrared sensor (400) being located in the accommodating space (700) and being disposed on the circuit board (300), the infrared sensor (400) comprising an infrared light emitting part (410) and an infrared light receiving part (420) both facing the screen cover (200), the first plano-convex lens (500) being disposed between the infrared light emitting part (410) and the screen cover (200), the second plano-convex lens (600) is disposed between the infrared light receiving section (420) and the screen cover (200), a convex surface side of the first plano-convex lens (500) faces the infrared light emitting section (410), and a convex surface side of the second plano-convex lens (600) faces the infrared light receiving section (420);
the plane side of the first plano-convex lens (500) is attached to the screen cover plate (200), and the plane side of the second plano-convex lens (600) is attached to the screen cover plate (200);
the inner wall of the middle frame (110) is provided with a support platform (111), the edges of the convex side of the first plano-convex lens (500) and the edges of the convex side of the second plano-convex lens (600) are respectively provided with a lapping table (510, 610), and the lapping tables (510, 610) of the first plano-convex lens (500) and the second plano-convex lens (600) are respectively lapped on the support platform (111);
the first plano-convex lens (500) and the second plano-convex lens (600) are clamped and fixed between the support platform (111) and the screen cover plate (200).
2. The mobile terminal according to claim 1, wherein the light-transmitting area of the first plano-convex lens (500) is smaller than the light-transmitting area of the second plano-convex lens (600), the light-transmitting area of the first plano-convex lens (500) is a projected area of the first plano-convex lens (500) in the light-transmitting direction thereof, and the light-transmitting area of the second plano-convex lens (600) is a projected area of the second plano-convex lens (600) in the light-transmitting direction thereof.
3. The mobile terminal of claim 1, wherein the first plano-convex lens (500) and the second plano-convex lens (600) are a one-piece lens, or the first plano-convex lens (500) and the second plano-convex lens (600) are fixed by gluing.
4. The mobile terminal of claim 1, wherein the screen cover (200) is a glass cover.
5. The mobile terminal of claim 1, wherein the infrared light emitting part (410) and the infrared light receiving part (420) are fixedly connected and soldered on the circuit board (300).
6. A mobile terminal according to claim 1, characterized in that the circuit board (300) is a main board or a sub board of the mobile terminal.
7. The mobile terminal according to any of claims 1-6, wherein the mobile terminal is a mobile phone, a tablet computer, an e-book reader, an MP3 player, or a wearable smart device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839644.8A CN108922398B (en) | 2018-07-26 | 2018-07-26 | Mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810839644.8A CN108922398B (en) | 2018-07-26 | 2018-07-26 | Mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108922398A CN108922398A (en) | 2018-11-30 |
| CN108922398B true CN108922398B (en) | 2021-06-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810839644.8A Active CN108922398B (en) | 2018-07-26 | 2018-07-26 | Mobile terminal |
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| Country | Link |
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| CN (1) | CN108922398B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106453723B (en) * | 2016-12-06 | 2022-10-21 | Oppo广东移动通信有限公司 | Sensor assembly and terminal |
| CN206490700U (en) * | 2016-12-06 | 2017-09-12 | 广东欧珀移动通信有限公司 | Sensor cluster and terminal |
| CN107968857A (en) * | 2017-12-26 | 2018-04-27 | 广东欧珀移动通信有限公司 | Input and output module and electronic device |
| CN108169757B (en) * | 2018-01-11 | 2023-12-12 | 上海兰宝传感科技股份有限公司 | High-precision identification light measurement system and method for central pixel |
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2018
- 2018-07-26 CN CN201810839644.8A patent/CN108922398B/en active Active
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