Spectrum detection circuit module and mobile terminal

Abstract

This disclosure relates to a spectral detection circuit module and a mobile terminal. The spectral detection circuit module includes a transmitting circuit and a photoelectric conversion circuit. The transmitting circuit emits light towards a target area. The photoelectric conversion circuit receives reflected light from the object under test and has multiple detection channels. Each detection channel is equipped with a light filter, which receives and detects light of a preset wavelength band. The preset wavelength band corresponds to different wavelength ranges that are less than a preset wavelength range threshold. This disclosure allows for more accurate detection of the preset wavelength band spectral information by the detection channels in the spectral detection circuit module, leading to more accurate detection of the spectral information of the object under test by the spectral sensor. This contributes to creating more novel user experiences for mobile terminals using this spectral sensor.

Description

Technical Field

[0001] This disclosure relates to the field of spectral detection technology, and in particular to a spectral detection circuit module and a mobile terminal. Background Technology

[0002] Currently, mobile devices have become an indispensable tool in people's daily lives.

[0003] As people's spiritual needs increase, there is a demand for mobile devices to have more new functions or user experiences. For example, if mobile devices had the ability to more accurately detect the spectral information of surrounding objects, it would help to generate more entirely new user experiences. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a spectral detection circuit module and a mobile terminal.

[0005] According to a first aspect of the present disclosure, a spectral detection circuit module is provided. The spectral detection circuit module includes an emitting circuit and a photoelectric conversion circuit; the emitting circuit is used to emit light towards a target area; the photoelectric conversion circuit is used to receive reflected light reflected by an object under test, and has multiple detection channels, each of the multiple detection channels being provided with an optical filter, and the optical filter is used to receive and detect light of a preset wavelength band, wherein the wavelength range corresponding to the light of the preset wavelength band is different and smaller than a preset wavelength band range threshold.

[0006] In one implementation, the number of multiple detection channels is greater than or equal to a preset number.

[0007] In another embodiment, the spectral detection circuit module further includes a receiving circuit; wherein each of the multiple detection channels in the photoelectric conversion circuit is connected to the receiving circuit via a switch.

[0008] In another embodiment, the receiving circuit includes an operational amplifier circuit; wherein each of the plurality of detection channels in the photoelectric conversion circuit is connected to the operational amplifier circuit in the receiving circuit via a switch.

[0009] In another implementation, the number of operational amplifier circuits is one.

[0010] In another implementation, multiple detection channels are connected in parallel.

[0011] In another embodiment, the optical filter includes an optical thin film coated on the detection channel.

[0012] In another embodiment, the photoelectric conversion circuit receives the reflected light from the object under test in a wavelength range greater than or equal to 380 nm and less than or equal to 780 nm.

[0013] A mobile terminal is provided according to a second aspect of the present disclosure. The mobile terminal includes: a spectral sensor for detecting the spectrum of an object to be measured, disposed on the lower surface of a glass cover of the mobile terminal; the spectral sensor including a spectral detection circuit module as described in the first aspect of the present disclosure or any embodiment thereof; an exit light aperture disposed on the glass cover at a position that allows the spectral sensor to emit light towards a target area along the exit light aperture; and an entrance light aperture disposed on the glass cover, wherein reflected light is received through the entrance light aperture, the reflected light being reflected light emitted by the spectral sensor and reflected by the object to be measured.

[0014] In one embodiment, the mobile terminal further includes: an outgoing light guide post disposed on the spectral sensor and extending to the outgoing light aperture, so that the spectral sensor emits light toward the target area in sequence through the outgoing light guide post and the outgoing light aperture; and an incoming light guide post disposed on the spectral sensor and extending to the incoming light aperture, so that the spectral sensor receives reflected light in sequence through the incoming light aperture and the incoming light guide post.

[0015] In another embodiment, a spacer is disposed between the outgoing light guide column and the incoming light guide column, wherein the outgoing light guide column and the incoming light guide column are separated by the spacer, and the spacer is made of an opaque material.

[0016] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: the spectral detection circuit module provided by this disclosure can make the spectral information of the preset band detected by the detection channel more accurate, thereby making the spectral information of the object to be measured detected by the spectral sensor more accurate, which helps to generate more new user experiences for mobile terminals that use the spectral sensor.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] Figure 1 This is a schematic diagram illustrating a spectral detection circuit module according to an exemplary embodiment of the present disclosure;

[0020] Figure 2 This is a schematic diagram illustrating another spectral detection circuit module according to an exemplary embodiment of the present disclosure;

[0021] Figure 3This is a schematic diagram illustrating yet another spectral detection circuit module according to an exemplary embodiment of the present disclosure;

[0022] Figure 4 This is a schematic diagram illustrating the structure of a mobile terminal according to an exemplary embodiment of the present disclosure. Detailed Implementation

[0023] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0024] In the accompanying drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this disclosure. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without inventive effort are within the scope of protection of this disclosure. The embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0025] In the description of this embodiment, it should be understood that the terms "center," "longitudinal," "lateral," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this embodiment. It should be noted that unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components described in these embodiments do not limit the scope of this disclosure.

[0026] Currently, spectral detection circuit modules often contain only a few detection channels, used to detect light within a specific wavelength range. For example, detection channel A can detect the spectral information of light from 380nm to 580nm; detection channel B can detect the spectral information of light from 580nm to 780nm. Because each detection channel detects a relatively wide wavelength range, the detected spectral information is not precise enough, ultimately affecting the accuracy of the spectral information detected by the spectral sensor using this spectral detection circuit module.

[0027] The first aspect of this disclosure provides a spectral detection circuit module, which enables the spectral sensor using the spectral detection circuit module to detect the spectral information of the object under test more accurately, and helps mobile terminals using the spectral sensor to generate more new user experiences.

[0028] Figure 1 This is a schematic diagram illustrating a spectral detection circuit module according to an exemplary embodiment of the present disclosure.

[0029] In an exemplary embodiment of this disclosure, as Figure 1 As shown, the spectral detection circuit module 100 includes an emission circuit 10 and a photoelectric conversion circuit 20. The emission circuit 10 and the photoelectric conversion circuit 20 will be described in detail below.

[0030] The transmitting circuit 10 is used to emit light towards the target area.

[0031] The transmission parameters of the transmitting circuit 10, such as transmission frequency, duty cycle, drive current and number of pulses, can be set by the central processing unit (CPU) and transmitted to the transmitting circuit 10 through the communication circuit.

[0032] The transmitting circuit 10 transmits light to the target area based on the transmission parameters set by the CPU.

[0033] In one embodiment, when the spectral sensor 210 with the spectral detection circuit module 100 is applied to the mobile terminal 200, the acquisition area reached by the light can be determined according to the specific application scenario configured for the spectral sensor 210, and this acquisition area is the target area. For example, in a call scenario, the spectral sensor 210 mainly acquires the spectral information of the user's side face when making or receiving a call. Therefore, the spectral sensor 210 can be positioned at the top of the mobile terminal 200, as long as that position can acquire the spectral information of the user's side face. As another example, in a front-facing camera scenario, the spectral sensor 210 is used to acquire the spectral information of the user's front face when using the front-facing camera. Therefore, the spectral sensor 210 can be positioned at any position on the front of the display screen facing the mobile terminal 200, as long as that position can acquire the spectral information of the user's front face.

[0034] The photoelectric conversion circuit 20 is used to receive the reflected light emitted by the transmitting circuit 10 onto the object under test and reflected back.

[0035] The photoelectric conversion circuit 20 has multiple detection channels 201. Each detection channel 201 is equipped with a light filter.

[0036] The optical filter can receive and detect light in a preset wavelength band, wherein the wavelength range corresponding to the preset wavelength band is different and is less than the preset wavelength range threshold.

[0037] Because the wavelength range corresponding to the preset wavelength band light received and detected by the optical filter is smaller than the preset wavelength range threshold, it can be ensured that the wavelength range corresponding to the preset wavelength band light that each optical filter can detect is not too large, thereby ensuring higher accuracy of the spectral information of the preset wavelength band light that each optical filter can detect. This ensures the accuracy of the overall spectral information obtained by combining the spectral information detected by each optical filter.

[0038] By using optical filters, detection channels 201 can ensure that each channel only receives and detects light within its corresponding wavelength range. For example, if optical filter A can filter out light in wavelengths other than those between 380nm and 385nm, then optical filter A can only receive and detect light in the wavelength range of 380nm to 385nm. Therefore, detection channel 201 equipped with optical filter A can only receive and detect light in the wavelength range of 380nm to 385nm.

[0039] Based on the same principle, the detection channel 201 equipped with optical filter B can only receive and detect light with a wavelength range between 385nm and 390nm.

[0040] The preset wavelength range threshold can be adjusted according to actual conditions. For the above embodiment, the preset wavelength range threshold corresponding to optical filter A can be 379nm to 386nm; the preset wavelength range threshold corresponding to optical filter B can be 384nm to 391nm. In this disclosure, no specific limitation is made on the preset wavelength range threshold corresponding to each optical filter.

[0041] The spectral detection circuit module 100 provided in this disclosure sets up multiple detection channels 201 in the photoelectric conversion circuit 20 of the spectral detection circuit module 100, and limits the wavelength range of light in a preset wavelength band that can be detected by each detection channel 201 to be less than a preset wavelength range threshold, so that the spectral information of the preset wavelength band detected by the detection channel 201 is more accurate. In turn, the spectral information of the object under test detected by the spectral sensor 210 based on the spectral detection circuit module 100 can be more accurate, thereby helping the mobile terminal 200 using the spectral sensor 210 to generate more new user experiences.

[0042] In an exemplary embodiment of this disclosure, the number of multiple detection channels 201 is greater than or equal to a preset number.

[0043] The preset quantity can be determined according to the actual situation. In this disclosure, no specific limit is made on the preset quantity.

[0044] In one embodiment, the number of detection channels 201 is also related to the wavelength range of light that each detection channel 201 can detect. The smaller the wavelength range of light that each detection channel 201 can detect, the more detection channels 201 there will be. By increasing the number of detection channels 201, the spectral information of the object under test detected by the spectral sensor 210 of the spectral detection circuit module 100 can be made more accurate.

[0045] In an exemplary embodiment of this disclosure, the spectral detection circuit module 100 further includes a receiving circuit 30.

[0046] Each detection channel 201 in the photoelectric conversion circuit 20 can be connected to the receiving circuit 30 via a switch. The switch can be a single-pole single-throw switch.

[0047] In one embodiment, every two detection channels 201 can also be connected to the receiving circuit 30 via a double-pole single-throw switch. This method can effectively reduce the number of switches used.

[0048] Figure 2 This is a schematic diagram illustrating another spectral detection circuit module according to an exemplary embodiment of the present disclosure.

[0049] In an exemplary embodiment of this disclosure, as Figure 2 As shown, the receiving circuit 30 includes an operational amplifier circuit 301.

[0050] By placing the operational amplifier circuit 301 in the receiving circuit 30, the received transmitted light signal can be amplified and processed, and the modular management of the circuit can be facilitated, thereby improving the efficiency of circuit management.

[0051] Furthermore, each detection channel 201 in the photoelectric conversion circuit 20 can be connected to the operational amplifier circuit 301 in the receiving circuit 30 via a switch. The switch can be a single-pole single-throw switch 202.

[0052] During application, when the detection channel A in the photoelectric conversion circuit 20 receives and detects light, the single-pole single-throw switch 202 connecting the detection channel A and the operational amplifier circuit 301 can be closed, while other single-pole single-throw switches 202 can be opened, thereby realizing the connection between the detection channel A and the operational amplifier circuit 301.

[0053] In one embodiment, every two detection channels 201 can also be connected to the operational amplifier circuit 301 in the receiving circuit 30 via a double-pole single-throw switch.

[0054] During application, when the detection channel A in the photoelectric conversion circuit 20 receives and detects light, the detection channel A can be connected to the operational amplifier circuit 301 by a single-pole double-throw switch, and the other single-pole double-throw switches can be disconnected, thereby realizing the connection between the detection channel A and the operational amplifier circuit 301.

[0055] In one embodiment, the number of operational amplifier circuits 301 can be one.

[0056] The spectral detection circuit module 100 can save on component costs by setting up an operational amplifier circuit 301 and connecting multiple detection channels 201 to the operational amplifier circuit 301 through a switch.

[0057] As a variation, the number of operational amplifier circuits 301 can be adjusted according to the actual situation, and is not limited to one.

[0058] In an exemplary embodiment of this disclosure, multiple detection channels 201 can be connected in parallel.

[0059] In one embodiment, the multiple detection channels 201 are connected in parallel, which ensures that when one of the detection channels 201 is disconnected from the operational amplifier circuit 301 through the single-pole single-throw switch 202, it does not affect the normal connection and operation of the other detection channels 201 and the operational amplifier circuit 301.

[0060] To more clearly demonstrate the operation of the spectral detection circuit module 100 disclosed herein, the following embodiments are described.

[0061] Figure 3 This is a schematic diagram illustrating yet another spectral detection circuit module according to an exemplary embodiment of the present disclosure.

[0062] In an exemplary embodiment of this disclosure, as Figure 3 As shown, the spectral detection circuit module 100 also includes a CPU 40, a digital circuit 50, a communication circuit 60, and a power supply circuit 70.

[0063] The transmitting circuit 10 emits light to the outside world. The emission parameters of the transmitting circuit 10 are set by the CPU 40 and transmitted to the transmitting circuit 10 through the communication circuit 60.

[0064] The photoelectric conversion circuit 20 receives the reflected light emitted by the transmitting circuit 10 onto the object under test and then reflected back. Each detection channel 201 in the photoelectric conversion circuit 20 can receive and detect light of a preset wavelength.

[0065] The detection channel 201, which receives and detects light of a preset wavelength band, is connected to the operational amplifier circuit 301 in the receiving circuit 30 via a single-pole single-throw switch 202. The receiving circuit 30 may also include an analog-to-digital converter circuit.

[0066] The photoelectric conversion circuit 20 converts the optical signal received and detected by the detection channel 201 into an electrical signal, and then transmits the electrical signal to the operational amplifier circuit 301. After the operational amplifier circuit 301 amplifies the electrical signal, it needs to be transmitted to the analog-to-digital conversion circuit.

[0067] The receiving circuit 30 converts the electrical signal into a digital signal through an analog-to-digital converter circuit, so that the spectral detection circuit module 100 can store the digital signal corresponding to the optical signal received and detected by the detection channel 201.

[0068] Since analog-to-digital conversion (A / D) of analog signals—that is, converting electrical signals into digital signals—requires a certain conversion time, the analog signal needs to remain essentially unchanged during this conversion time to ensure the accuracy of the converted digital signal. Therefore, before the spectral detection circuit module 100 converts the electrical signal into a digital signal through the A / D conversion circuit, it also needs to ensure that the analog signal remains essentially unchanged during the conversion time.

[0069] In one embodiment, the receiving circuit 30 may further include a sample-and-hold circuit.

[0070] Before transmitting the amplified electrical signal to the analog-to-digital converter circuit, the operational amplifier circuit 301 needs to transmit the electrical signal to the sample-and-hold circuit for processing, so as to ensure that the electrical signal remains basically unchanged during the conversion time of converting the electrical signal to a digital signal.

[0071] Furthermore, the receiving circuit 30 can transmit the converted digital signal to the digital circuit 50.

[0072] The digital circuit 50 includes a register. The spectral detection circuit module 100 can store the digital signals corresponding to the light signals received and detected by each detection channel 201, that is, the spectral information of the light received and detected by each detection channel 201, through the register.

[0073] Furthermore, the communication circuit 60 sends the digital signals corresponding to the optical signals received and detected by each detection channel 201 stored in the digital circuit 50 to the CPU 40. The CPU 40 can merge the spectral information of the light received and detected by each detection channel 201 to form complete spectral information.

[0074] It should be noted that in the spectral detection circuit module 100, the power supply circuit 70 can supply power to the transmitting circuit 10, the receiving circuit 30, and the communication circuit 60, etc.

[0075] In one embodiment, the spectral detection circuit module 100 may further include a temperature compensation circuit. The temperature compensation circuit may be connected to the transmitting circuit 10, the receiving circuit 30, and the power supply circuit 70, respectively.

[0076] The temperature compensation circuit can compensate for and mitigate the problem of reduced circuit stability caused by increased circuit noise due to temperature in the transmitting circuit 10, receiving circuit 30, and power supply circuit 70.

[0077] In one embodiment, the spectral detection circuit module 100 may further include a crystal oscillator circuit.

[0078] The crystal oscillator circuit is used to generate a periodic signal for the spectrum detection circuit module 100, which is then divided or multiplied to supply the transmitting circuit 10, the receiving circuit 30, and the power supply circuit 70. This ensures that the frequency information of each circuit in the spectrum detection circuit module 100 remains synchronized.

[0079] In an exemplary embodiment of this disclosure, the optical filter includes an optical thin film coated on the detection channel 201.

[0080] Different optical films can receive light in different preset wavelengths.

[0081] The optical film coated on the detection channel 201 can be a single layer or multiple layers.

[0082] In an exemplary embodiment of this disclosure, the photoelectric conversion circuit 20 receives the reflected light emitted by the transmitting circuit 10 onto the object under test, and the wavelength range of the reflected light is greater than or equal to 380 nm and less than or equal to 780 nm.

[0083] The wavelength range of light that the photoelectric conversion circuit 20 can detect is determined based on the wavelength range of light that each detection channel 201 can detect.

[0084] If the photoelectric conversion circuit 20 has a total of 5 detection channels, where detection channel A receives and detects light of a preset wavelength range of 380nm to 390nm; detection channel B receives and detects light of a preset wavelength range of 390nm to 400nm; detection channel C receives and detects light of a preset wavelength range of 400nm to 410nm; detection channel D receives and detects light of a preset wavelength range of 410nm to 420nm; and detection channel E receives and detects light of a preset wavelength range of 420nm to 430nm, then the photoelectric conversion circuit 20 can detect light in the wavelength range of 380nm to 430nm.

[0085] In the application of the mobile terminal 200, the spectral information of visible light often affects the new functions derived from the mobile terminal 200. Therefore, the photoelectric conversion circuit 20 can detect light within the visible light range, that is, a range greater than or equal to 380 nm and less than or equal to 780 nm. In application, this can be achieved by setting a corresponding detection channel 201 in the photoelectric conversion circuit 20 of the spectral detection circuit module 100.

[0086] Figure 4 This is a schematic diagram illustrating the structure of a mobile terminal according to an exemplary embodiment of the present disclosure.

[0087] Based on the same inventive concept, a second aspect of this disclosure provides a mobile terminal 200.

[0088] In an exemplary embodiment of this disclosure, as Figure 4 As shown, the mobile terminal 200 includes a spectral sensor 210, an exit light aperture 220, and an entrance light aperture 230. The components and their connections will be described below.

[0089] A spectral sensor 210 is used to detect the spectrum of an object to be measured and is disposed on the lower surface of the glass cover 240 of the mobile terminal 200. The spectral sensor 210 includes the spectral detection circuit module 100 described in the first aspect of this disclosure and any embodiment thereof.

[0090] The light emission aperture 220 is positioned on the glass cover plate 240 such that the spectral sensor 210 emits light towards the target area along the light emission aperture 220.

[0091] The spectral sensor 210 can emit light into the target area through the exit light aperture 220. The light emitted into the target area through the exit light aperture 220 will be reflected when it encounters the object to be measured, and will enter the spectral sensor 210 through the incident light aperture 230.

[0092] An incident light aperture 230 is disposed on a glass cover plate 240. The spectral sensor 210 receives reflected light through the incident light aperture 230, wherein the reflected light is the reflected light emitted by the spectral sensor 210 and emitted back by the object under test.

[0093] In one embodiment, the spectral sensor 210 may also be disposed on the lower surface of the display screen of the mobile terminal 200.

[0094] The light emission aperture 220 and the light incident aperture 230 can be respectively set on the display screen and extend from the display screen to the glass cover plate 240, so that the spectral sensor 210 can emit light to the target area through the light emission aperture 220, and the light emitted by the light emission aperture 220 to the target area can also enter the spectral sensor 210 through the light incident aperture 230 after being reflected by the object to be measured.

[0095] In an exemplary embodiment of this disclosure, the mobile terminal 200 further includes an outgoing light guide column.

[0096] The light guide column is positioned above the spectral sensor 210 and extends to the light outlet 220, so that the spectral sensor 210 emits light toward the target area through the light guide column and the light outlet 220 in sequence.

[0097] The mobile terminal 200 also includes an incident light guide column.

[0098] An incident light guide post is placed on the spectral sensor 210 and extends to the incident light aperture 230, so that the spectral sensor 210 receives reflected light sequentially through the incident light aperture 230 and the incident light guide post.

[0099] Among them, the reflected light is the reflected light emitted by the spectral sensor 210 and emitted back by the object under test.

[0100] The mobile terminal 200 is equipped with an outgoing light guide column, which can ensure that the light energy is not lost inside the mobile terminal 200 during the process of the spectral sensor 210 emitting light to the target area, but instead the light is emitted to the target area along the outgoing light guide column and the outgoing light aperture 220.

[0101] The mobile terminal 200 is equipped with an incident light guide post, which ensures that the spectral sensor 210 does not lose light energy inside the mobile terminal 200 during the process of receiving reflected light. Instead, the reflected light is received along the incident light aperture 230 and the incident light guide post, which improves the accuracy and efficiency of the spectral sensor 210 in detecting spectral information.

[0102] In an exemplary embodiment of this disclosure, the mobile terminal 200 further includes a partition column.

[0103] A spacer is placed between the outgoing light guide and the incoming light guide, separating them. The spacer is made of an opaque material.

[0104] In this way, it can be ensured that the light emitted by the spectral sensor 210 along the outgoing light guide and the outgoing light aperture 220 will not crosstalk with the light received along the incident light aperture 230 and the incident light guide. This can improve the accuracy of the light emitted by the spectral sensor 210 towards the target area and the accuracy of the received reflected light based on the light emitted towards the target area, thereby ensuring the accuracy of the spectral information of the detected object.

[0105] In an exemplary embodiment of this disclosure, the mobile terminal 200 mentioned above may be a mobile phone, a tablet computer, a smart wearable device, or other mobile terminal devices.

[0106] The mobile terminal 200 provided in this disclosure uses a spectral sensor 210 with a spectral detection circuit module 100.

[0107] By setting multiple detection channels 201 in the photoelectric conversion circuit 20 of the spectral detection circuit module 100, and limiting the wavelength range of light in the preset wavelength band that each detection channel 201 can detect to be less than the preset wavelength range threshold, the spectral information of the preset wavelength band detected by the detection channel 201 can be more accurate, thereby making the spectral information of the object to be detected by the spectral sensor 210 more accurate, which helps the mobile terminal 200 to generate more new user experiences.

[0108] Since the mobile terminal 200 is equipped with a spectral sensor 210, the transmission power of the proximity sensor (P-sensor) can be adjusted based on the user's skin color information detected by the spectral sensor 210, or the proximity threshold and distance threshold set by the mobile terminal 200 can be adjusted. In this way, the transmission power, proximity threshold, and distance threshold can be adjusted according to different user situations, making the set transmission power, proximity threshold, and distance threshold more personalized to the user, thereby improving the user experience.

[0109] The mobile terminal 200 can also determine the first color temperature value of the light shining on the user's face based on the spectral information detected by the spectral sensor 210. It then adjusts the second color temperature value of the screen based on this first color temperature value to match the first color temperature value of the light shining on the user's face, thereby improving the user's experience when using the mobile terminal 200.

[0110] In one embodiment, the spectral sensor 210 can detect corresponding spectral information through multiple detection channels 201, and the spectral information of the light received and detected by each detection channel 201 can be merged into a complete spectral information. The merged complete spectral information is the spectral information of the object under test.

[0111] Based on the spectral information of the object under test obtained by detection, the values ​​of the RGB three channels corresponding to the spectral information can be obtained. By normalizing the values ​​of the RGB three channels, the corresponding color coordinates can be obtained.

[0112] Furthermore, the color temperature value of the object under test can be obtained based on the color coordinates.

[0113] Once the color temperature value of the object to be measured is known, the screen of the mobile terminal 200 can be adjusted to make the color temperature value of the screen of the mobile terminal 200 consistent with the color temperature value of the object to be measured.

[0114] Since the colors displayed on a screen are determined by the colors displayed by multiple pixels, and the color that each pixel can display is determined by the color synthesized from its corresponding R, G, and B sub-pixels, the colors displayed on the screen can be adjusted by changing the colors of the R, G, and B sub-pixels of each pixel.

[0115] Taking OLED (Organic Light-Emitting Diode) displays as an example, the color displayed by each pixel on an OLED display is determined by the voltage of its R, G, and B subpixels. Therefore, the colors displayed by the R, G, and B subpixels can be adjusted by changing their voltages. This leads to the determination of the color displayed by each pixel based on the colors of the R, G, and B subpixels, and ultimately, the color temperature value of the screen display.

[0116] The above embodiment achieves more accurate detection of the spectral information of the object under test through the spectral sensor 210 in the mobile terminal 200. Based on the detected spectral information of the object under test, the color temperature value of the screen of the mobile terminal 200 is adjusted. This improves the user experience when using the mobile terminal 200.

[0117] The foregoing description of embodiments of this disclosure has been provided for purposes of illustration and description. The foregoing description is not exhaustive and is not intended to limit this disclosure to the exact form disclosed; various modifications and variations may be made in accordance with the foregoing teachings, or may be derived from practice of this disclosure. These embodiments were chosen and described to illustrate the principles of this disclosure and its practical application, enabling those skilled in the art to utilize this disclosure in various implementations and modifications suitable for the particular purpose conceived.

Claims

1. A mobile terminal, characterized in that, The mobile terminal includes a spectral detection circuit module, which is located at the top of the mobile terminal or at any position on the front of the mobile terminal's display screen. This module is used to collect the user's facial spectral information. The spectral information is used to adjust the emission power of a proximity sensor, or to adjust the proximity threshold and distance threshold of the mobile terminal. Furthermore, the spectral information is also used to determine a first color temperature value, which is used to adjust a second color temperature value of the display screen. The spectral detection circuit module includes an emission circuit and a photoelectric conversion circuit. The transmitting circuit is used to emit light towards the target area; The photoelectric conversion circuit is used to receive reflected light from the object under test. The wavelength range of the reflected light received by the photoelectric conversion circuit is greater than or equal to 380nm and less than or equal to 780nm. The photoelectric conversion circuit has multiple detection channels. Each of the multiple detection channels is equipped with a light filter. The light filter is used to receive and detect light of a preset wavelength band. The wavelength range corresponding to the light of the preset wavelength band is different and less than a preset wavelength range threshold. The number of the multiple detection channels is greater than or equal to a preset number. The multiple detection channels are connected in parallel, and at least one of the detection channels is connected by a switch. A temperature compensation circuit, connected to the transmitting circuit, is provided to compensate for and mitigate circuit noise caused by temperature.

2. The mobile terminal according to claim 1, characterized in that, The spectral detection circuit module also includes a receiving circuit; In the photoelectric conversion circuit, each of the plurality of detection channels is connected to the receiving circuit via the switch.

3. The mobile terminal according to claim 2, characterized in that, The receiving circuit includes an operational amplifier circuit; In this circuit, each of the plurality of detection channels in the photoelectric conversion circuit is connected to the operational amplifier circuit in the receiving circuit via the switch.

4. The mobile terminal according to claim 3, characterized in that, The number of operational amplifier circuits is one.

5. The mobile terminal according to claim 1, characterized in that, The optical filter includes: An optical thin film coated on the detection channel.

6. The mobile terminal according to any one of claims 1 to 5, characterized in that, The mobile terminal includes: A spectral sensor, used to detect the spectrum of an object under test, is disposed on the lower surface of the glass cover of the mobile terminal, wherein the spectral sensor includes the spectral detection circuit module; An emission aperture is positioned on the glass cover plate such that the spectral sensor emits light toward the target region along the emission aperture. An incident light aperture is disposed on the glass cover plate, through which reflected light is received. The reflected light is the light emitted by the spectral sensor and reflected by the object under test.

7. The mobile terminal according to claim 6, characterized in that, The mobile terminal also includes: An outgoing light guide column is disposed above the spectral sensor and extends to the outgoing light aperture, so that the spectral sensor emits light toward the target area in sequence through the outgoing light guide column and the outgoing light aperture; An incident light guide post is disposed above the spectral sensor and extends to the incident light aperture, so that the spectral sensor receives the reflected light sequentially through the incident light aperture and the incident light guide post.

8. The mobile terminal according to claim 7, characterized in that, The mobile terminal also includes: A spacer is disposed between the outgoing light guide column and the incoming light guide column, wherein the outgoing light guide column and the incoming light guide column are separated by the spacer, and the spacer is made of an opaque material.

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