Ambient light intensity detection method for equipment and related components

Abstract

The present invention discloses a method for detecting ambient light intensity of a device and related components, relating to the field of detection technology. In view of the fact that the luminous intensity of a display screen can affect the accuracy of detecting the ambient light intensity, a preset contrast-interference value correspondence is established. First, the detected light intensity of the ambient environment is obtained. Then, based on the contrast of the display screen and the preset contrast-interference value correspondence, the interference light intensity at the current contrast can be determined. The difference between the detected light intensity and the interference light intensity is the actual light intensity of the ambient environment. This solution effectively resolves the problem in the prior art where interference light intensity is superimposed on the determination of actual light intensity. The light intensity determination result is more accurate and reliable, ensuring the reliability of subsequent contrast adjustment of the display screen. From the user's perspective, the luminous intensity of the display screen can be more accurately adjusted as the actual light intensity changes, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a method for detecting ambient light intensity of a device and related components. Background Art

[0002] Devices with display functions, such as smartwatches and smart bracelets, often include a feature that automatically adjusts the display's luminous intensity to ensure a smooth user experience. This feature uses a sensor to detect the ambient light intensity of the display device and adaptively adjusts the display's luminous intensity. As the ambient light increases, the display's luminous intensity also increases to prevent the user from seeing the screen; as the ambient light decreases, the display's luminous intensity also decreases to prevent glare and impaired vision. However, in actual applications, the display itself typically operates while the sensor is operating. Therefore, the light emitted by the display can affect the sensor's detection accuracy, resulting in inappropriate luminous intensity adjustment and a poor user experience. Summary of the Invention

[0003] The purpose of the present invention is to provide an ambient light intensity detection method and related components for a device, which can more accurately and reliably determine the light intensity and more precisely adjust the luminous intensity of the display screen as the actual light intensity changes, thereby improving the user experience.

[0004] To solve the above technical problems, the present invention provides a method for detecting ambient light intensity of a device, comprising:

[0005] Acquiring the detected light intensity of the surrounding environment of the device;

[0006] Determining interference light intensity based on the contrast of the display screen in the device and a preset contrast-interference value correspondence relationship, wherein the interference light intensity represents the interference of the luminous intensity of the display screen on the detection light intensity;

[0007] The difference between the detected light intensity and the interference light intensity is used as the actual light intensity of the surrounding environment.

[0008] Preferably, obtaining the detected light intensity of the surrounding environment in which the device is located includes:

[0009] The detected light intensity of the surrounding environment of the device is acquired by an ambient light sensor in the device, or the detected light intensity is determined by a preset light intensity acquisition circuit in the device.

[0010] Preferably, the preset light intensity collection circuit includes a photoresistor, a voltage divider resistor and a voltage sampling module;

[0011] The photoresistor and the voltage divider resistor are connected in series, one end of the series circuit is connected to a DC power supply, and the other end of the series circuit is grounded;

[0012] The voltage sampling module is connected in parallel with the photoresistor and is used to collect the voltage across the photoresistor;

[0013] Determining the detection light intensity by a preset light intensity acquisition circuit in the device includes:

[0014] determining a resistance value of the photoresistor based on the received voltage;

[0015] The detection light intensity is determined according to the resistance value and a preset resistance-light intensity correspondence relationship.

[0016] Preferably, after taking the difference between the detected light intensity and the interference light intensity as the actual light intensity of the surrounding environment, the method further includes:

[0017] Determining the intended adjusted contrast of the display screen according to the actual light intensity and a preset ambient light intensity-contrast correspondence relationship;

[0018] The contrast of the display screen is controlled to be corrected to the intended adjusted contrast.

[0019] Preferably, the preset contrast-interference value correspondence is stored in a non-volatile memory.

[0020] Preferably, the step of pre-establishing the preset contrast-interference value correspondence includes:

[0021] Controlling the contrast of the display screen to be adjusted sequentially according to a preset adjustment interval; wherein the device is in a closed environment, and the closed environment includes a light source that is fixed in position and can emit a preset fixed light intensity;

[0022] When the display screen is at any contrast, perform the following steps:

[0023] Acquire the collected light intensity of the closed environment where the device is located at the contrast ratio;

[0024] The difference between the collected light intensity and the preset fixed light intensity is used as the interference value under the contrast.

[0025] In order to solve the above technical problems, the present invention further provides an ambient light intensity detection system for a device, comprising:

[0026] A light intensity acquisition unit, configured to acquire the detected light intensity of the surrounding environment in which the device is located;

[0027] an interference light intensity determination unit, which determines the interference light intensity based on the contrast of the display screen in the device and a preset contrast-interference value correspondence relationship, wherein the interference light intensity represents the interference of the luminous intensity of the display screen on the detection light intensity;

[0028] The ambient light intensity determining unit is configured to take the difference between the detected light intensity and the interference light intensity as the actual light intensity of the surrounding environment.

[0029] In order to solve the above technical problems, the present invention further provides an ambient light intensity detection device for a device, comprising:

[0030] memory for storing computer programs;

[0031] The processor is used to execute the steps of the ambient light intensity detection method of the device as described above.

[0032] In order to solve the above technical problems, the present invention further provides a device, including a display screen and an ambient light intensity detection device of the device as described above.

[0033] Preferably, the device is a wearable device.

[0034] The present invention provides a method for detecting ambient light intensity of a device and related components. To address the situation where the luminous intensity of a display screen affects the accuracy of detecting the ambient light intensity, a preset contrast-interference value correspondence is established. First, the detected light intensity of the ambient environment is obtained. Then, based on the contrast of the display screen and the preset contrast-interference value correspondence, the interference light intensity at the current contrast can be determined. The difference between the detected light intensity and the interference light intensity is the actual light intensity of the ambient environment. This solution effectively solves the problem of interference light intensity being superimposed on the determination of actual light intensity in the prior art. The light intensity determination result is more accurate and reliable, ensuring the reliability of subsequent contrast adjustment of the display screen. From the user's perspective, the luminous intensity of the display screen is more accurately adjusted as the actual light intensity changes, improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the prior art and the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 A flow chart of a method for detecting ambient light intensity of a device provided by the present invention;

[0037] Figure 2 A schematic structural diagram of a device for establishing a preset contrast-interference value correspondence relationship provided by the present invention;

[0038] Figure 3 A schematic structural diagram of an ambient light intensity detection system for a device provided by the present invention;

[0039] Figure 4 This is a structural schematic diagram of an ambient light intensity detection device of a device provided by the present invention. DETAILED DESCRIPTION

[0040] The core of the present invention is to provide an ambient light intensity detection method and related components for a device. The light intensity determination result is more accurate and reliable, and the luminous intensity of the display screen is more accurately adjusted as the actual light intensity changes, thereby improving the user experience.

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0042] Please refer to Figure 1 , Figure 1 This is a flow chart of a method for detecting ambient light intensity of a device provided by the present invention.

[0043] In this embodiment, considering that devices with display functions may include a function to automatically adjust the display's luminous intensity, the sensor operates while the display itself is also operating, capturing a portion of its emitted light. Consequently, the ambient light intensity determined in the prior art is actually superimposed on the display's luminous intensity, impacting the user experience. To address this technical issue, the present invention provides a method for detecting ambient light intensity in a device, which effectively improves the accuracy of determining ambient light intensity.

[0044] The ambient light intensity detection method of the device includes:

[0045] S11: Acquire the detection light intensity of the surrounding environment of the device;

[0046] It should be noted that the devices here include but are not limited to various devices with display functions, such as wearable devices such as smart watches and smart bracelets, or servers including display screens, and the specific method of obtaining the detected light intensity includes but is not limited to pre-designing a light intensity acquisition circuit, and determining the detected light intensity through the light intensity acquisition circuit. No special limitation is made here.

[0047] In addition, the ambient light intensity detection method of the device can be applied to a control module in the device, and the control module includes but is not limited to an MCU (Microcontroller Unit).

[0048] S12: Determine the interference light intensity based on the contrast of the display screen in the device and a preset contrast-interference value correspondence relationship, where the interference light intensity represents the interference of the luminous intensity of the display screen on the detection light intensity;

[0049] Specifically, adjusting the display's brightness essentially adjusts the display's contrast. A preset contrast-interference value correspondence is established. The current display's contrast is then determined, and using this contrast as a reference, the interfering light intensity corresponding to the current contrast is determined by searching the preset contrast-interference value correspondence. Furthermore, in actual storage, this preset contrast-interference value correspondence can be stored as a two-dimensional array.

[0050] S13: The difference between the detected light intensity and the interference light intensity is taken as the actual light intensity of the surrounding environment.

[0051] It can be seen that the actual light intensity of the device's surrounding environment can be accurately determined through the above-mentioned light intensity difference logic. It can be understood that the contrast of the display screen can then be adjusted based on the actual light intensity, thereby changing the luminous brightness of the display screen.

[0052] In summary, the present application provides an ambient light intensity detection method and related components for a device. In view of the fact that the luminous intensity of the display screen affects the detection accuracy of the surrounding ambient light intensity, a preset contrast-interference value correspondence is established, which effectively solves the problem in the prior art where interference light intensity is superimposed on the determination of the actual light intensity. The light intensity determination result is more accurate and reliable, ensuring the reliability of subsequent contrast adjustment of the display screen. From the user's perspective, the luminous intensity of the display screen is more accurately adjusted as the actual light intensity changes, thereby improving the user experience.

[0053] Based on the above embodiment:

[0054] As a preferred embodiment, obtaining the detected light intensity of the surrounding environment of the device includes:

[0055] The detected light intensity of the surrounding environment of the device is acquired by an ambient light sensor in the device, or the detected light intensity is determined by a preset light intensity acquisition circuit in the device.

[0056] In this embodiment, a method for obtaining the detected light intensity of the surrounding environment of the device is provided. One method is to rely on the ALS (Ambient Light Sensor) to collect light intensity, and the other method is to rely on the pre-set preset light intensity collection circuit to determine the detected light intensity. The implementation method is simple and reliable.

[0057] As a preferred embodiment, the preset light intensity collection circuit includes a photoresistor, a voltage divider resistor and a voltage sampling module;

[0058] The photoresistor and the voltage divider resistor are connected in series, one end of the series circuit is connected to a DC power supply, and the other end of the series circuit is grounded;

[0059] The voltage sampling module is connected in parallel with the photoresistor to collect the voltage across the photoresistor;

[0060] The detection light intensity is determined by a preset light intensity acquisition circuit in the device, including:

[0061] determining a resistance value of the photoresistor based on the received voltage;

[0062] The detection light intensity is determined based on the resistance value and the preset resistance-light intensity correspondence.

[0063] In this embodiment, a circuit implementation of a preset light intensity collection circuit is provided. The specific circuit connection structure is as described above and will not be repeated here. It should be noted that the specific resistance values ​​of the photoresistor and the voltage divider resistor are not limited here and can be set according to actual needs.

[0064] Specifically, the specific steps for determining the resistance of the photoresistor based on the received voltage are as follows: the output voltage of the DC power supply is known to be U1, the resistance of the voltage divider resistor is R1, and the voltage across the photoresistor is collected to be U2. Therefore, the current flowing in the circuit is (U1-U2) / R1, and the resistance of the photoresistor is obtained to be U2 / ((U1-U2) / R1).

[0065] As a preferred embodiment, after taking the difference between the detected light intensity and the interference light intensity as the actual light intensity of the surrounding environment, the method further includes:

[0066] Determine the contrast of the display screen to be adjusted based on the actual light intensity and the preset ambient light intensity-contrast correspondence;

[0067] The contrast of the control display has been corrected to the intended contrast adjustment.

[0068] After accurately determining the actual light intensity of the environment in which the device is located according to the method steps described in the above embodiment, the luminous intensity of the display screen can be adjusted accordingly, that is, the contrast of the display screen can be corrected in the above manner, thereby ensuring that the luminous intensity of the display screen adapts to the actual light intensity, thereby improving the user experience.

[0069] As a preferred embodiment, the preset contrast-interference value correspondence is stored in a non-volatile memory.

[0070] In this embodiment, the inventors further considered that in order to avoid the loss of the preset contrast-interference value correspondence after the device is powered off, the correspondence can be directly stored in a non-volatile memory, and specifically, the non-volatile memory includes but is not limited to FLASH.

[0071] It should also be noted that since the reading speed of the non-volatile memory may be relatively slow, after the device is powered on, the control module in the device, such as the MCU, reads the preset contrast-interference value correspondence and stores it in the RAM. Although the RAM will be lost after power failure, its access speed will be faster, which facilitates the rapid capture of the correspondence after the device is powered on, thereby improving access efficiency.

[0072] As a preferred embodiment, the step of pre-establishing the preset contrast-interference value correspondence includes:

[0073] Controlling the contrast of the display screen to be adjusted sequentially according to a preset adjustment interval; wherein the device is in a closed environment, the closed environment including a light source that is fixed in position and can emit a preset fixed light intensity;

[0074] When the display is at any contrast, perform the following steps:

[0075] Obtain the collected light intensity of the closed environment where the device is located under the contrast;

[0076] The difference between the collected light intensity and the preset fixed light intensity is taken as the interference value under contrast.

[0077] In this embodiment, an implementation method for pre-establishing a preset contrast-interference value correspondence is provided. It should be noted that, to ensure that the correspondence can cover all adjustable contrasts of the display screen, the preset adjustment interval here can be 1, so the contrast of the display screen is controlled to be adjusted from 0%, 1%, 2%... to 100% in sequence, and the interference value of the display screen at any contrast is determined respectively, as shown in Table 1. Among them, taking the collected light intensity of the closed environment in which the device is located through the ambient light sensor (ALS) as an example, the corresponding interference value at each contrast can be determined.

[0078] Table 1

[0079] Display contrast Collected light intensity Interference value Contrast 0% als_ambient_0% als_interfernce_0 Contrast 1% als_ambient_1% als_interfernce_1 Contrast 2% als_ambient_2% als_interfernce_2 Contrast 3% als_ambient_3% als_interfernce_3 Contrast ratio 4% als_ambient_4% als_interfernce_4 …… …… …… Contrast ratio 97% als_ambient_97% als_interfernce_97 Contrast ratio 98% als_ambient_98% als_interfernce_98 Contrast ratio 99% als_ambient_99% als_interfernce_99 Contrast 100% als_ambient_100% als_interfernce_100

[0080] Specifically, taking the example of an ambient light sensor included in the device, in order to avoid the influence of external light on the ambient light sensor, the device needs to be set in a closed environment, and a light source is placed at a fixed distance (such as 20 cm) from the device in the closed environment. The preset fixed light intensity can be set according to actual needs, such as 2000LUX light intensity, which is not specifically limited here. In addition, taking the device as a smart bracelet as an example, the smart bracelet can be connected to a monitoring device (such as a server) via a wired (such as USB connection) or wireless (such as Wi-Fi connection), and the monitoring device sends instructions to control the contrast of the device's display screen to adjust in sequence according to the preset adjustment interval. Specifically, Figure 2FIG. 1 shows a schematic diagram of a structure of a device for establishing a preset contrast-interference value correspondence relationship. Figure 2 The cylinder in the figure represents the closed environment and the monitoring equipment with the functions described above.

[0081] Please refer to Figure 3 , Figure 3 This is a structural schematic diagram of an ambient light intensity detection device of a device provided by the present invention.

[0082] The device's ambient light intensity detection system includes:

[0083] The light intensity acquisition unit 21 is used to acquire the detection light intensity of the surrounding environment where the device is located;

[0084] An interference light intensity determination unit 22 determines the interference light intensity based on the contrast of the display screen in the device and a preset contrast-interference value correspondence relationship, where the interference light intensity represents the interference of the luminous intensity of the display screen on the detection light intensity;

[0085] The ambient light intensity determining unit 23 is configured to take the difference between the detected light intensity and the interference light intensity as the actual light intensity of the surrounding environment.

[0086] For an introduction to the ambient light intensity detection system of the device provided in the present invention, please refer to the embodiment of the ambient light intensity detection method of the above-mentioned device, which will not be described in detail here.

[0087] As a preferred embodiment, the light intensity acquisition unit 21 specifically includes a first acquisition unit or a second acquisition unit;

[0088] The first acquisition unit is used to acquire the detected light intensity of the surrounding environment of the device collected by the ambient light sensor in the device;

[0089] The second acquisition unit is used to determine the detection light intensity through a preset light intensity acquisition circuit in the device.

[0090] Wherein, the preset light intensity collection circuit includes a photoresistor, a voltage divider resistor and a voltage sampling module;

[0091] The photoresistor and the voltage divider resistor are connected in series, one end of the series circuit is connected to a DC power supply, and the other end of the series circuit is grounded;

[0092] The voltage sampling module is connected in parallel with the photoresistor and is used to collect the voltage across the photoresistor;

[0093] The second acquiring unit includes:

[0094] a resistance determining unit, configured to determine a resistance of the photoresistor based on the received voltage;

[0095] The detection light intensity determination unit is used to determine the detection light intensity according to the resistance value and a preset resistance-light intensity correspondence relationship.

[0096] As a preferred embodiment, the ambient light intensity detection system of the device further includes:

[0097] A proposed adjustment unit, configured to determine a proposed adjustment contrast of the display screen according to the actual light intensity and a preset ambient light intensity-contrast correspondence relationship;

[0098] The contrast correction unit is used to control the contrast correction of the display screen to the intended adjusted contrast.

[0099] As a preferred embodiment, the ambient light intensity detection system of the device further includes a preset relationship establishment unit, which is used to pre-establish the preset contrast-interference value correspondence relationship;

[0100] The preset relationship establishing unit includes:

[0101] A contrast control unit, configured to control the contrast of the display screen to be adjusted sequentially according to a preset adjustment interval; wherein the device is in a closed environment, and the closed environment includes a light source that is fixed in position and can emit a preset fixed light intensity;

[0102] A collected light intensity acquisition unit, configured to acquire the collected light intensity of the closed environment where the device is located at any contrast when the display screen is at the contrast; and trigger an interference light intensity determination unit;

[0103] The interference light intensity determination unit is configured to take the difference between the collected light intensity and the preset fixed light intensity as the interference value under the contrast.

[0104] Please refer to Figure 4 , Figure 4 This is a structural schematic diagram of an ambient light intensity detection device of a device provided by the present invention.

[0105] The ambient light intensity detection device of the equipment includes:

[0106] Memory 31, for storing computer programs;

[0107] The processor 32 is configured to execute the steps of the method for detecting ambient light intensity of the device as described above.

[0108] For an introduction to the ambient light intensity detection device of the device provided in the present invention, please refer to the embodiment of the ambient light intensity detection method of the above-mentioned device, which will not be described in detail here.

[0109] The present invention also provides a device, characterized in that it includes a display screen and an ambient light intensity detection device as described above.

[0110] For an introduction to the device provided in the present invention, please refer to the embodiment of the ambient light intensity detection method of the above-mentioned device, which will not be repeated here.

[0111] As a preferred embodiment, the device is a wearable device.

[0112] It should be noted that the wearable devices here include but are not limited to smart watches and smart bracelets with display functions.

[0113] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. The term "comprise", "include" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of further restrictions, the elements defined by the sentence "comprise a..." do not exclude the presence of other identical elements in the process, method, article or equipment including the elements.

[0114] Those skilled in the art will further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented using electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. The above description of the disclosed embodiments will enable a person skilled in the art to implement or use the present invention. The present invention is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for detecting ambient light intensity of a device, characterized in that: include: Acquiring the detected light intensity of the surrounding environment of the device; Determining interference light intensity based on the contrast of the display screen in the device and a preset contrast-interference value correspondence relationship, wherein the interference light intensity represents the interference of the luminous intensity of the display screen on the detection light intensity; Taking the difference between the detected light intensity and the interference light intensity as the actual light intensity of the surrounding environment; The step of pre-establishing the preset contrast-interference value correspondence relationship includes: Controlling the contrast of the display screen to be adjusted sequentially according to a preset adjustment interval; wherein the device is in a closed environment, the closed environment includes a light source that is fixed in position and can emit a preset fixed light intensity; the preset adjustment interval is 1%; When the display screen is at any contrast, perform the following steps: Acquire the collected light intensity of the closed environment where the device is located at the contrast ratio; The difference between the collected light intensity and the preset fixed light intensity is used as the interference value under the contrast.

2. The method for detecting ambient light intensity of a device according to claim 1, wherein: Acquiring the detected light intensity of the surrounding environment of the device, including: The detected light intensity of the surrounding environment of the device is acquired by an ambient light sensor in the device, or the detected light intensity is determined by a preset light intensity acquisition circuit in the device.

3. The method for detecting ambient light intensity of a device according to claim 2, wherein: The preset light intensity acquisition circuit includes a photoresistor, a voltage divider resistor and a voltage sampling module; The photoresistor and the voltage divider resistor are connected in series, one end of the series circuit is connected to a DC power supply, and the other end of the series circuit is grounded; The voltage sampling module is connected in parallel with the photoresistor and is used to collect the voltage across the photoresistor; Determining the detection light intensity by a preset light intensity acquisition circuit in the device includes: determining a resistance value of the photoresistor based on the received voltage; The detection light intensity is determined according to the resistance value and a preset resistance-light intensity correspondence relationship.

4. The method for detecting ambient light intensity of a device according to claim 1, wherein: After taking the difference between the detected light intensity and the interference light intensity as the actual light intensity of the surrounding environment, the method further includes: Determining the intended adjusted contrast of the display screen according to the actual light intensity and a preset ambient light intensity-contrast correspondence relationship; The contrast of the display screen is controlled to be corrected to the intended adjusted contrast.

5. The method for detecting ambient light intensity of a device according to claim 1, wherein: The preset contrast-interference value correspondence relationship is stored in a non-volatile memory.

6. An ambient light intensity detection system for a device, characterized in that: include: A light intensity acquisition unit, configured to acquire the detected light intensity of the surrounding environment in which the device is located; an interference light intensity determination unit, which determines the interference light intensity based on the contrast of the display screen in the device and a preset contrast-interference value correspondence relationship, wherein the interference light intensity represents the interference of the luminous intensity of the display screen on the detection light intensity; an ambient light intensity determining unit, configured to use a difference between the detected light intensity and the interference light intensity as the actual light intensity of the surrounding environment; A preset relationship establishing unit, configured to pre-establish the preset contrast-interference value corresponding relationship; The preset relationship establishing unit includes: a contrast control unit, configured to control the contrast of the display screen to be adjusted sequentially according to a preset adjustment interval; wherein the device is in a closed environment, the closed environment including a light source that is fixedly positioned and can emit a preset fixed light intensity; and the preset adjustment interval is 1%; A collected light intensity acquisition unit, configured to acquire the collected light intensity of the closed environment where the device is located at any contrast when the display screen is at the contrast; and trigger an interference light intensity determination unit; The interference light intensity determination unit is configured to take the difference between the collected light intensity and the preset fixed light intensity as the interference value under the contrast.

7. An ambient light intensity detection device for a device, characterized in that: include: memory for storing computer programs; A processor, configured to execute the steps of the ambient light intensity detection method of the device as described in any one of claims 1 to 5.

8. A device, characterized in that The device comprises a display screen and an ambient light intensity detection device as claimed in claim 7.

9. The device according to claim 8, characterized in that The device is a wearable device.

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