Electronic device

Abstract

The utility model provides electronic equipment which comprises a display module and an ambient light detection circuit, and the ambient light detection circuit is arranged below the display module. Wherein the ambient light detection circuit comprises an ambient light detection element and a signal processing circuit, the ambient light detection element is used for detecting external ambient light and generating an electric signal, the signal processing circuit comprises a signal transmission channel, and the signal transmission channel is electrically connected with the ambient light detection element; the signal processing circuit is used for converting an analog signal of the electric signal into a digital signal and outputting a light flicker value and a light sensation value of ambient light in parallel. The electronic equipment can realize the function of preventing the ambient light under the screen from flickering, avoids additional hole digging in the screen, enables the exterior of the electronic equipment to be attractive, and improves the use experience of a user.

Description

Technical Field

[0001] This application relates to the technical field of electronic devices, and particularly to an electronic device. Background Art

[0002] Currently, electronic devices do not support the function of preventing screen - under ambient light from flickering. For non - screen - under ambient light flickering solutions, holes need to be drilled near the camera. For example, holes are drilled in the metal ring of the rear camera or in the screen, which makes the appearance of the electronic device unaesthetic and the user experience poor. Summary of the Utility Model

[0003] This application provides an electronic device that can achieve the function of preventing screen - under ambient light from flickering.

[0004] This application provides an electronic device, including: a display module and an ambient light detection circuit, where the ambient light detection circuit is disposed below the display module; wherein, the ambient light detection circuit includes:

[0005] An ambient light detection element for detecting the external ambient light and generating an electrical signal; and

[0006] A signal processing circuit, including a signal transmission channel, the signal transmission channel is electrically connected to the ambient light detection element, and the signal processing circuit is used to convert the analog signal of the electrical signal into a digital signal and output the light flicker value and the light sense value of the ambient light in parallel.

[0007] Preferably, the signal processing circuit includes:

[0008] An analog signal processing circuit electrically connected to the ambient light detection element;

[0009] An analog - to - digital conversion circuit electrically connected to the analog signal processing circuit; and

[0010] A digital signal processing circuit electrically connected to the digital signal processing circuit.

[0011] Preferably, the number of the ambient light detection elements is one; the number of the signal transmission channels and the analog - to - digital conversion circuits are both set to one; the digital signal processing circuit includes a flicker signal processing circuit and a light sense signal processing circuit, both the flicker signal processing circuit and the light sense signal processing circuit are electrically connected to the analog - to - digital conversion circuit, the flicker signal processing circuit outputs the light flicker value, and the light sense signal processing circuit outputs the light sense value.

[0012] Preferably, the number of the ambient light detection elements is multiple; the numbers of the signal transmission channels, the analog-to-digital conversion circuits, and the digital signal processing circuits are all set to be multiple, and the numbers of the signal transmission channels, the analog-to-digital conversion circuits, and the digital signal processing circuits are correspondingly set according to the number of the ambient light detection elements.

[0013] Preferably, the ambient light detection circuit includes an 2 I2C bus, and the analog-to-digital conversion circuit is electrically connected to the digital signal processing circuit through the 2 I2C bus.

[0014] Preferably, the ambient light detection element and the signal processing circuit are integrated on the same circuit board.

[0015] Preferably, the number of the ambient light detection elements is set to be at least one.

[0016] Preferably, the ambient light detection element includes a photodiode.

[0017] Preferably, the ambient light detection circuit further includes at least one ambient color detection element, which is electrically connected to the signal processing circuit.

[0018] Preferably, the ambient light detection circuit further includes an ambient color detection element; the ambient light detection circuit further includes a blocking filter, which is arranged on the ambient light detection element and / or the ambient color detection element.

[0019] Preferably, the blocking filter includes a blocking filter film, and the blocking filter film covers the surface of the ambient light detection element and / or the ambient color detection element.

[0020] Preferably, the blocking filter includes at least one of an ultraviolet blocking filter and an infrared blocking filter.

[0021] Preferably, the ambient light detection circuit is located in the upper half of the display module.

[0022] Preferably, the electronic device includes a camera, and the ambient light detection circuit is arranged on one side of the camera, where the camera includes at least one of a front camera and a rear camera.

[0023] The electronic device provided by the embodiment of the present application is provided with an ambient light detection circuit below the display module. The ambient light detection circuit includes an ambient light detection element and a signal processing circuit. The signal processing circuit is electrically connected to the ambient light detection element through a signal transmission channel. The ambient light detection element is used to detect the external ambient light and generate an electrical signal, and the signal processing circuit outputs the light flicker value and the light sense value of the ambient light in parallel. With such a setting, the electronic device can not only obtain the light sense value, but also obtain the light flicker value, thus realizing the function of preventing screen flickering of the ambient light under the screen, avoiding additional holes in the screen, making the appearance of the electronic device beautiful, and improving the user experience.

[0024] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The structure diagram of an embodiment of the electronic device of the present application is shown.

[0026] Figure 2 The principle block diagram of an embodiment of the ambient light detection circuit of the electronic device of the present application is shown.

[0027] Figure 3 Shown as Figure 2 The principle block diagram of another embodiment of the ambient light detection circuit of the electronic device shown.

[0028] Figure 4 Shown as Figure 2 The principle block diagram of yet another embodiment of the ambient light detection circuit of the electronic device shown.

[0029] Figure 5 Shown as Figure 2 The principle block diagram of another embodiment of the ambient light detection circuit of the electronic device shown. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The electronic device provided by the embodiment of the present application will be described in detail below with reference to the accompanying drawings. Without conflict, the features in the following various embodiments and implementation manners can be combined arbitrarily with each other.

[0031] Figure 1 The structure diagram of an embodiment of the electronic device 1 of the present application is shown. As Figure 1 shown, the electronic device 1 includes an ambient light detection circuit 10 and a display module 20, and the ambient light detection circuit 10 is disposed below the display module 20. Figure 1As shown, the ambient light detection circuit 10 is located below the display module 20 and is represented by a dashed box. In this embodiment, the display module 20 may be a display screen. The ambient light detection circuit 10 may be disposed below the display screen to implement the under-screen flashing function of the electronic device 1. The electronic device 1 may be a mobile phone, a foldable mobile phone, or a non-foldable mobile phone, such as a straight-bar mobile phone. There is no limitation in this application.

[0032] In Figure 1 the embodiment shown, the ambient light detection circuit 10 is located in the upper half of the display module 20. The ambient light detection circuit 10 is located in the upper half of the plane where the display screen is located. With such a setting, the ambient light detection circuit 10 is not blocked when detecting the external ambient light, which can avoid affecting the acquisition effect. In some embodiments, the electronic device 1 includes a camera (not shown), and the ambient light detection circuit 10 is disposed in an area close to the camera, where the camera includes at least one of a front camera and a rear camera. The ambient light detection circuit 10 is used to detect the external ambient light and determine the flashing frequency of the external ambient light. When the camera takes a picture, the exposure time and the like can be adjusted according to the determined flashing frequency of the external ambient light, so that the bright and dark stripes of the picture caused by the flashing of the external ambient light are eliminated when the camera takes a picture, and the quality of the image is improved. The ambient light detection circuit 10 may be disposed close to the front camera or close to the rear camera, which means being located in an area close to the front camera or the rear camera. The ambient light detection circuit 10 may also be disposed in other areas of the electronic device 1. By disposing the ambient light detection circuit 10 in an area close to the camera, the connection lines can be reduced, and the wiring structure can be made compact. With such a setting, since there is no need to make additional holes in the screen, it can not only assist the rear camera in use, but also assist the front camera to achieve the anti-flashing function.

[0033] Figure 2 The following shows a schematic block diagram of an embodiment of the ambient light detection circuit 10 of the electronic device 1 according to the present application. As Figure 2As shown in the figure, the ambient light detection circuit 10 includes an ambient light detection element 11 and a signal processing circuit 12. The ambient light detection element 11 is used to detect the external ambient light and generate an electrical signal. The ambient light detection element 11 detects the external ambient light, obtains the optical signal and performs photoelectric conversion to generate a corresponding electrical signal. The signal processing circuit 12 includes a signal transmission channel 121, and the signal transmission channel 121 is electrically connected to the ambient light detection element 11. The ambient light detection element 11 can transmit the converted electrical signal to the signal processing circuit 12 through the signal transmission channel 121. The signal processing circuit 12 is used to convert the analog signal of the electrical signal into a digital signal and output the light flicker value and the light sensing value of the ambient light in parallel. The light flicker value and the light sensing value output in parallel by the signal processing circuit 12 are both digital signals, respectively representing different parameters of the external ambient light. For example, the light flicker value can represent the flicker frequency of the external ambient light, etc. The light sensing value can represent information such as the illuminance and / or color temperature of the external ambient light. Extendably, the signal processing circuit 12 can also output other values, which are not limited in this application.

[0034] In the electronic device 1 provided by the embodiment of the present application, by arranging the ambient light detection circuit 10 below the display module 20, the ambient light detection circuit 10 includes the ambient light detection element 11 and the signal processing circuit 12, and the signal processing circuit 12 is electrically connected to the ambient light detection element 11 through the signal transmission channel 121. The ambient light detection element 11 is used to detect the external ambient light and generate an electrical signal, and the signal processing circuit 12 outputs the light flicker value and the light sensing value of the ambient light in parallel. With such a setting, the electronic device 1 can not only obtain the light sensing value, but also obtain the light flicker value, thus realizing the function of preventing screen flickering of the ambient light under the screen, avoiding additional holes in the screen, making the appearance of the electronic device 1 beautiful, and improving the user experience.

[0035] In Figure 2 In the shown embodiment, the ambient light detection element 11 and the signal processing circuit 12 are integrated into the same circuit board. The ambient light detection element 11 and the signal processing circuit 12 are integrated into the same circuit board, with high integration degree, and can be arranged below the display screen, making the structure compact and the circuit simple.

[0036] Figure 3 As shown in Figure 2 As shown in the principle block diagram of another embodiment of the ambient light detection circuit 10 of the electronic device 1. As Figure 3As shown, in some embodiments, the signal processing circuit 12 includes an analog signal processing circuit 122, an analog-to-digital conversion circuit 123, and a digital signal processing circuit 124. The analog signal processing circuit 122 is electrically connected to the ambient light detection element 11. The analog-to-digital conversion circuit 123 is electrically connected to the analog signal processing circuit 122. The digital signal processing circuit 124 is electrically connected to the digital signal processing circuit 124. In this embodiment, the analog signal processing circuit 122 is electrically connected to the ambient light detection element 11 through the signal transmission channel 121. The analog signal processing circuit 122 is configured to obtain the electrical signal after conversion by the ambient light detection element 11 and output an analog electrical signal. The analog-to-digital conversion circuit 123 is configured to convert the analog electrical signal into a digital electrical signal. The digital signal processing circuit 124 is configured to process the digital electrical signal and output the light flicker value and the light sensing value of the ambient light in parallel. In this embodiment, the light flicker value can represent the flicker frequency of the external ambient light. The digital signal processing circuit 124 is also electrically connected to the camera. When the digital signal processing circuit 124 outputs the light flicker value, it will feedback to the camera and output the exposure time of the camera corresponding to the light flicker value, etc. The camera will perform an exposure operation according to the output exposure time. When the light flicker values are different, the corresponding exposure time of the camera is also different. The above operations make the flicker frequency of the external ambient light consistent with the exposure time when the camera takes pictures, which can eliminate the bright and dark stripes of the picture caused by the flicker of the external ambient light, improve the quality of the image, and thus improve the user's visual experience. The light sensing value output by the digital signal processing circuit 124 can represent information such as the illuminance and / or color temperature of the external ambient light, and can be fed back to other components of the electronic device 1, and the components are used to analyze and process the information such as the illuminance and / or color temperature of the external ambient light.

[0037] For example, in this embodiment, an optical signal of a signal transmission channel of the light sensing chip of the analog signal processing circuit 122 is reused (for example, the C channel of the model TCS3720 is used). The analog-to-digital conversion circuit 123 is used to perform analog-to-digital conversion on the data of this signal transmission channel. The digital signal processing circuit 124 sets the integration (sampling) time of this channel to at least 0.5 ms, and calculates the flicker value at least once every 512 data entries (256 ms). The light sensing value is calculated at least once every 40 data entries (20 ms), and the two values are reported and calculated in parallel, independent of each other and not affecting each other. That is, the ambient light detection circuit 10 of this embodiment reuses the same ambient light detection element 11 to detect the external ambient light, and reuses the same digital signal processing circuit 124 to output the light flicker value and the light sensing value of the ambient light in parallel, so that the electronic device 1 can not only obtain the light sensing value, but also obtain the light flicker value, thus realizing the function of preventing screen flickering of ambient light, solving the problem of inaccurate detection of the ambient light flicker frequency under lower ambient light, improving the detection of the flicker frequency, and having high sensitivity. Moreover, no additional hole is needed in the screen, which can improve the screen-to-body ratio and the appearance aesthetics, make the outside of the electronic device 1 beautiful, and enhance the user experience. No additional flicker function chip is required, and no additional hole is needed, which can improve the waterproof and dustproof performance of the device and reduce the manufacturing cost.

[0038] In Figure 3 the embodiment shown, the ambient light detection circuit 10 includes an I 2 C bus 125, and the analog-to-digital conversion circuit 123 is electrically connected to the digital signal processing circuit 124 through the I 2 C bus 125. The I 2 C bus 125 is a serial communication protocol used for communication between the microcontroller and external devices, and is used to connect the analog-to-digital conversion circuit 123 and the digital signal processing circuit 124, and can synchronize signals to ensure the stability and reliability of data.

[0039] In some embodiments, the number of the ambient light detection elements 11 is set to at least one. The number of the ambient light detection elements 11 can be one or more than one. In some embodiments, the ambient light detection element 11 can be a photosensitive element. In this embodiment, the ambient light detection element 11 includes a photodiode. The photodiode is used to convert the optical signal into an electrical signal. The structure is simple and the sensitivity is high.

[0040] Figure 4 Shown as Figure 2 the principle block diagram of another embodiment of the ambient light detection circuit 10 of the electronic device 1 shown. As Figure 4As shown, in some embodiments, the number of ambient light detection elements 11 is one. The numbers of the signal transmission channel 121 and the analog-to-digital conversion circuit 123 are both set to one. The digital signal processing circuit 124 includes a flicker signal processing circuit 126 and a light sensing signal processing circuit 127. Both the flicker signal processing circuit 126 and the light sensing signal processing circuit 127 are electrically connected to the analog-to-digital conversion circuit 123. The flicker signal processing circuit 126 outputs a light flicker value, and the light sensing signal processing circuit 127 outputs a light sensing value. In this embodiment, the photodiode is set to one. The positive electrode of the photodiode is grounded, and the negative electrode of the photodiode is electrically connected to the signal transmission channel 121. The digital signal processing circuit 124 is respectively provided with two circuits, namely, the flicker signal processing circuit 126 and the light sensing signal processing circuit 127, to process the digital signals respectively, so as to output the flicker value and the light sensing value in parallel. The flicker signal processing circuit 126 is also electrically connected to the camera. When the flicker signal processing circuit 126 outputs the light flicker value, it will feedback to the camera and output the exposure time of the camera corresponding to the light flicker value, etc. The camera will perform an exposure operation according to the output exposure time. When the light flicker values are different, the corresponding adjusted exposure times of the camera are also different. The above operations enable the camera to keep the light flicker frequency of the external ambient light consistent with the exposure time when taking pictures, which can eliminate the bright and dark stripes of the picture caused by the flicker of the external ambient light and improve the image quality. The light sensing value output by the light sensing signal processing circuit 127 can represent information such as the illuminance and / or color temperature of the external ambient light, and can be feedback to other components of the electronic device 1, and the component is used to analyze and process the information such as the illuminance and / or color temperature of the external ambient light.

[0041] The ambient light detection circuit 10 of this embodiment multiplexes the same ambient light detection element 11 to detect the external ambient light, and uses the flicker signal processing circuit 126 and the light sensing signal processing circuit 127 of the digital signal processing circuit 124 to output the light flicker value and the light sensing value of the ambient light in parallel, so that the electronic device 1 can not only obtain the light sensing value, but also obtain the light flicker value. In this way, the function of preventing screen flickering of the ambient light under the screen is realized, avoiding additional holes in the screen, making the appearance of the electronic device 1 beautiful and improving the user experience.

[0042] In some other embodiments, the number of ambient light detection elements 11 is plural. The numbers of the signal transmission channels 121, the analog-to-digital conversion circuits 123, and the digital signal processing circuits 124 are all set to be plural, and the numbers of the signal transmission channels 121, the analog-to-digital conversion circuits 123, and the digital signal processing circuits 124 are set corresponding to the number of the ambient light detection elements 11. For example, in this embodiment, two photodiodes are provided. The analog signal processing circuit 122 provides two signal transmission channels 121, which are respectively electrically connected to the two photodiodes. Similarly, two analog-to-digital conversion circuits 123 can also be provided. Two digital signal processing circuits 124 can also be provided, that is, including a flicker signal processing circuit 126 and a light sensing signal processing circuit 127, which respectively process the digital signals to output the flicker value and the light sensing value in parallel. Compared with Figure 4 the embodiment shown, in this embodiment, the output flicker value and light sensing value respectively utilize different detection signals and signal processing branches, and they do not affect each other. The light sensing sensitivity under the screen is high, and it can quickly respond to the change of external light. When other parameters are extended, it is convenient to increase the detection signals and signal processing branches, and the expandability is strong. With such a setting, the electronic device 1 can not only obtain the light sensing value, but also obtain the light flicker value, and can also expand to obtain other values. In this way, on the basis of realizing the function of preventing light flicker of the ambient light under the screen, other functions can be expanded, avoiding additional holes in the screen, making the exterior of the electronic device 1 beautiful and improving the user experience.

[0043] Figure 5 As shown Figure 2 is a principle block diagram of another embodiment of the ambient light detection circuit 10 of the electronic device 1 shown. Figure 5 The embodiment shown is similar to Figure 4 the embodiment shown, and the main difference is that Figure 5In the illustrated embodiment, the ambient light detection circuit 10 further includes at least one ambient color detection element 13, electrically connected to the signal processing circuit 12. In this embodiment, the ambient color detection element 13 may be an RGB color detection element 131. The RGB color detection elements may be color detection elements for three primary colors, namely red (R), green (G), and blue (B), and the color detection element may be a photodiode. The RGB color detection element 131 is used to detect different colors of the external ambient light, that is, to detect the color temperature of the external ambient light. The RGB color detection element 131 may also participate in the detection of ambient light together with the ambient light detection element 11 (for example, the C channel or the visible light channel) to calculate the light information of the ambient light, such as including lux (illuminance) and CCT (color temperature), etc., not limited thereto. Correspondingly, the digital signal processing circuit 124 further includes a color signal processing circuit 128, electrically connected to the analog-to-digital conversion circuit 123, for processing the color electrical signal. With such a setting, the ambient light detection circuit 10 of this embodiment can not only detect the light flicker value and light sensing value of the external ambient light, but also detect the light information of the external ambient light, such as including illuminance and color temperature, etc., with rich functions and improved user experience.

[0044] In some embodiments, the ambient light detection circuit 10 further includes a blocking filter, provided on the ambient light detection element 11 and / or the ambient color detection element 13. The blocking filter may be transparent (allowing light to pass through) or blocking (preventing light from passing through) within a specific wavelength band. In some embodiments, the blocking filter includes a blocking filter film, and the blocking filter film covers the surface of the ambient light detection element 11 and / or the ambient color detection element 13. In some embodiments, the blocking filter includes at least one of an ultraviolet blocking filter and an infrared blocking filter. The ultraviolet blocking filter can prevent the light of ultraviolet (UV) from passing through. The infrared blocking filter can prevent the light in the infrared (IR) wavelength band from passing through. In this embodiment, the UV / IR blocking filter is designed to allow the visible light wavelength bands of the three primary colors, red (R), green (G), and blue (B), to pass through, and can also allow the visible light wavelength bands of transparent colors to pass through, and is applied to scenarios where accurate color imaging is required and the influence of non-visible light is avoided, so as to optimize the imaging quality effect.

[0045] It should be understood that the present application is not limited to the exact structure already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. An electronic device, characterized in that, Comprising: A display module and an ambient light detection circuit, the ambient light detection circuit being disposed below the display module; wherein, the ambient light detection circuit includes: An ambient light detection element for detecting ambient light in the external environment and generating an electrical signal; and A signal processing circuit including a signal transmission channel, the signal transmission channel being electrically connected to the ambient light detection element, the signal processing circuit being configured to convert the analog signal of the electrical signal into a digital signal and output the light flicker value and the light sensing value of the ambient light in parallel.

2. The electronic device according to claim 1, wherein The signal processing circuit includes: An analog signal processing circuit electrically connected to the ambient light detection element; An analog-to-digital conversion circuit electrically connected to the analog signal processing circuit; and A digital signal processing circuit electrically connected to the digital signal processing circuit.

3. The electronic device according to claim 2, characterized in that, The number of the ambient light detection elements is one; the number of the signal transmission channels and the analog-to-digital conversion circuits are both set to one; the digital signal processing circuit includes a flicker signal processing circuit and a light sensing signal processing circuit, the flicker signal processing circuit and the light sensing signal processing circuit are both electrically connected to the analog-to-digital conversion circuit, the flicker signal processing circuit outputs the light flicker value, and the light sensing signal processing circuit outputs the light sensing value.

4. The electronic device according to claim 2, wherein The number of the ambient light detection elements is multiple; the number of the signal transmission channels, the analog-to-digital conversion circuits, and the digital signal processing circuits are all set to be multiple, and the number of the signal transmission channels, the analog-to-digital conversion circuits, and the digital signal processing circuits are correspondingly set to the number of the ambient light detection elements.

5. The electronic device according to claim 2 or 3 or 4, characterized in that, The ambient light detection circuit includes an I 2 2C bus, and the analog-to-digital conversion circuit is electrically connected to the digital signal processing circuit through the I 2 2C bus.

6. The electronic device according to claim 1, characterized in that, The ambient light detection element and the signal processing circuit are integrated into the same circuit board; and / or The number of the ambient light detection elements is set to be at least one; and / or The ambient light detection element includes a photodiode.

7. The electronic device according to claim 1, characterized in that, The ambient light detection circuit further includes at least one ambient color detection element electrically connected to the signal processing circuit.

8. The electronic device according to claim 1, wherein The ambient light detection circuit further includes an ambient color detection element; the ambient light detection circuit further includes a blocking filter disposed on the ambient light detection element and / or the ambient color detection element.

9. The electronic device according to claim 8, wherein, The blocking filter includes a blocking filter film, the blocking filter film covering the surface of the ambient light detection element and / or the ambient color detection element; and / or The blocking filter includes at least one of an ultraviolet blocking filter and an infrared blocking filter.

10. The electronic device according to claim 1, characterized in that, The ambient light detection circuit is located in the upper half of the display module; and / or The electronic device includes a camera, the ambient light detection circuit being disposed in a region close to the camera, wherein the camera includes at least one of a front camera and a rear camera.

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