CN116682367A

CN116682367A - Screen ambient light detection method, electronic device, medium and program product

Info

Publication number: CN116682367A
Application number: CN202211261257.3A
Authority: CN
Inventors: 孙建明; 李辰龙
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-10-14
Filing date: 2022-10-14
Publication date: 2023-09-01
Anticipated expiration: 2042-10-14
Also published as: CN116682367B

Abstract

The application provides a screen ambient light detection method, electronic equipment, a medium and a program product, and relates to the technical field of terminals. The method comprises the following steps: acquiring an acquisition value of the light intensity of the screen in a first state and an acquisition value of the light intensity of the screen in a second state, and acquiring a light intensity value of the screen according to a relation between the light intensity of the screen, which is obtained by fitting in advance, the light intensity of the screen in the first state and the light intensity of the screen in the second state, and based on the acquisition value of the light intensity of the screen in the first state and the acquisition value of the light intensity of the screen in the second state; and then obtaining the light intensity value of the screen environment light according to the acquired value of the light intensity of the screen in the first state and the light intensity value of the screen luminescence. The method provided by the application has the advantages of simple calculation process for calculating the luminous intensity value of the screen, reduced power consumption and higher accuracy.

Description

Screen ambient light detection method, electronic device, medium and program product

Technical Field

The present application relates to the field of terminal technologies, and in particular, to a method for detecting ambient light on a screen, an electronic device, a medium, and a program product.

Background

The screen ambient light detection technique may measure the incident ambient light intensity of the display screen, causing the processor to adjust the display screen backlight based on the measured ambient light intensity, which may help improve the viewing experience of the user and reduce power consumption. At present, most of intelligent terminal display products adopt Organic Light-Emitting Diode (OLED) display screens, and in order to enhance the sensory experience of users, terminal manufacturers pursue an extreme screen occupation ratio on the appearance of the intelligent terminal display products. The completion of ambient light detection without affecting full-screen display of an OLED display screen has become a mainstream trend of high-end intelligent terminal display products.

At present, an ambient light detection scheme based on an OLED comprehensive screen generally adopts an ambient light sensor to simultaneously detect the sum of the external ambient light intensity of the OLED display screen and the luminous intensity of the OLED display screen, then calculates the luminous intensity of the OLED display screen through a software algorithm, and then subtracts the calculated luminous intensity of the OLED display screen from the sum of the external ambient light intensity of the OLED display screen and the luminous intensity of the OLED display screen detected by the ambient light sensor to obtain the ambient light intensity of the OLED display screen. The method for calculating the light emission of the OLED display screen by using the software algorithm is complex in calculation, high in power consumption, and poor in accuracy due to the fact that accuracy is easily influenced by the brightness of the display screen.

Disclosure of Invention

In order to solve the above problems, the present application provides a screen ambient light detection method, an electronic device, a medium, and a program product, which reduce complexity in calculating ambient light intensity, reduce power consumption, and improve accuracy of the obtained ambient light intensity.

In order to achieve the above purpose, the application adopts the following technical scheme:

in a first aspect, the present application provides a method of on-screen ambient light detection, the method being applicable to an electronic device comprising a sensor and a processor. The method comprises the following steps: the sensor acquires an acquisition value of light intensity of the screen in a first state and an acquisition value of light intensity of the screen in a second state, wherein the first state is that a screen area acquired by the sensor is in a full-bright state in the acquisition process, and the second state is that the screen area acquired by the sensor is in an intermittent luminous state in the acquisition process; this is designed for the subsequent calculation of the luminous intensity value of the screen.

The processor calculates the luminous intensity value of the screen based on the acquired value of the luminous intensity of the screen in the first state and the acquired value of the luminous intensity of the screen in the second state according to the relation between the luminous intensity of the screen, which is obtained by fitting in advance, the luminous intensity of the screen in the first state and the luminous intensity of the screen in the second state; before calculating the luminous intensity value of the screen and the luminous intensity value of the ambient light, a calculation formula for calculating the luminous intensity value of the screen is needed to be constructed, namely, a relation between the luminous intensity of the screen and the luminous intensity of the screen in a first state and the luminous intensity of the screen in a second state is obtained, and after the acquired values of the sensor for acquiring the luminous intensity of the screen in the two states are obtained, the luminous intensity value of the screen is calculated according to the relation obtained by fitting in advance. And then the processor obtains the light intensity value of the screen environment light according to the acquired value of the light intensity of the screen in the first state and the light intensity value of the screen light.

In the method, the luminous intensity value of the screen is calculated according to the acquired value of the luminous intensity of the screen in two states and a calculation formula for calculating the luminous intensity value of the screen.

In one possible implementation manner, if the collection duration of the collection value of the light intensity of the sensor collection screen in the first state is a first duration, the collection duration of the collection value of the light intensity of the collection screen in the second state is a second duration, and the first duration and the second duration may be equal or unequal; under the condition that the first time length is not equal to the second time length, the acquired value of the light intensity of the screen in the first state or the acquired value of the light intensity of the screen in the second state can be amplified or reduced in the same proportion according to the proportional relation between the first time length and the second time length. For ambient light, the integration time has good linearity, can be normalized to the same integration time, and then processed.

In one possible implementation manner, in the process that the sensor collects the collected value of the light intensity of the screen in the first state and the collected value of the light intensity of the screen in the second state, a screen refreshing condition may occur, because the screen in the second state corresponds to the condition that the screen dimming signal is low level crossing the sensor, the screen may be refreshed when the screen dimming signal is low level, and if the screen is refreshed, the average value of the collected value of the light intensity of the screen in the first state collected by the sensor before the screen refreshing and the collected value of the light intensity of the screen in the first state collected by the sensor after the screen refreshing is used as the collected value of the light intensity of the screen in the first state. This reduces calculation errors caused by variations in the value of the luminous intensity of the screen.

In one possible implementation manner, a sensor may have one channel or multiple channels, and if the sensor has multiple channels, the collected values of the light intensities of the screens of other channels in the first state and the collected values of the light intensities of the screens in the second state may be collected according to the method in the embodiment of the application; then, according to the relation, acquiring the luminous intensity values of the screens of other channels based on the acquired value of the luminous intensity of the screens of the other channels in the first state and the acquired value of the luminous intensity of the screens of the other channels in the second state; then according to the collected light intensity values of the screens of other channels in the first state and the luminous light intensity values of the screens of other channels, obtaining the screen environment light intensity values of other channels; and then obtaining the screen ambient light intensity value of the sensor based on the screen ambient light intensity value of each channel according to the relation between the screen ambient light intensity value of each channel and the screen ambient light intensity value of the sensor obtained by fitting in advance.

In one possible implementation, when the sensors collect the collected values of the light intensity of the screen in the first state and the collected values of the light intensity of the screen in the second state, the collected values of the light intensity of the screen in the first state may be collected by the first set of sensors; the second group of sensors are used for collecting the light intensity collecting values of the screen in the second state in the process of collecting the light intensity by the first group of sensors, so that the collecting time can be overlapped, and the sensor detection error caused by the change of the external environment light can be reduced.

In one possible implementation, when the sensors collect the collected values of the light intensity of the screen in the first state and the collected values of the light intensity of the screen in the second state, the first group of sensors may be used to collect the collected values of the light intensity of the screen in the first state and the collected values of the light intensity of the screen in the second state respectively; respectively acquiring the acquired value of the light intensity of the screen in the first state by using a second group of sensors, and acquiring the acquired value of the light intensity of the screen in the second state; then taking the average value of the acquired values of the light intensity of the screen in the first state acquired by the first group of light-emitting light intensity value sensors and the acquired value of the light intensity of the screen in the first state acquired by the second group of light-emitting light intensity value sensors as the acquired value of the light intensity of the screen in the first state; and taking the average value of the acquired values of the light intensity of the screen in the second state acquired by the first group of sensors of the light intensity value of the light emitted and the acquired values of the light intensity of the screen in the second state acquired by the second group of sensors of the light intensity value of the light emitted as the acquired value of the light intensity of the screen in the second state. In this way, errors due to ambient light variations or the acquisition of the sensor itself can be avoided.

In one possible implementation, the electronic device may set a start time and an end time for the sensor to collect the light intensity of the screen in the first state and the light intensity of the screen in the second state according to the dimming signal of the screen and the refresh signal of the screen pixels. The sensor can collect the OLED display screen for the first time when the OLED display screen is in the first state, and collect the OLED display screen for the second time when the OLED display screen is in the second state.

In a second aspect, the present application provides an electronic device comprising a sensor for acquiring a light intensity value, a processor and a memory; wherein one or more computer programs are stored in the memory, the one or more computer programs comprising instructions; the instructions, when executed by the processor, cause the electronic device to perform the screen ambient light detection method as described in any one of the possible designs of the first aspect above.

In a third aspect, the present application provides a computer storage medium comprising computer instructions which, when run on an electronic device, perform a screen ambient light detection method as described in any one of the possible designs of the first aspect above.

In a fourth aspect, the present application provides a computer program product for performing the screen ambient light detection method described in any one of the possible designs of the first aspect above when the computer program product is run on a computer.

It should be appreciated that the description of technical features, aspects, benefits or similar language in the present application does not imply that all of the features and advantages may be realized with any single embodiment. Conversely, it should be understood that the description of features or advantages is intended to include, in at least one embodiment, the particular features, aspects, or advantages. Therefore, the description of technical features, technical solutions or advantageous effects in this specification does not necessarily refer to the same embodiment. Furthermore, the technical features, technical solutions and advantageous effects described in the present embodiment may also be combined in any appropriate manner. Those of skill in the art will appreciate that an embodiment may be implemented without one or more particular features, aspects, or benefits of a particular embodiment. In other embodiments, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments.

Drawings

Fig. 1A is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 1B is a software structural block diagram of an electronic device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an interface of a display screen of an electronic device for a user according to an embodiment of the present application;

FIG. 3 is a flowchart of a method for detecting ambient light of an OLED display screen according to an embodiment of the present application;

FIG. 4 is a timing chart of an OLED display screen ambient light detection method according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a multi-pulse EM signal according to an embodiment of the present application;

FIG. 6A is a schematic diagram of the position of the high level of the EM signal of the OLED display screen at the beginning and the end of the acquisition time according to the embodiment of the present application;

FIG. 6B is a schematic diagram showing the position of the high level of the EM signal of the OLED display screen at the beginning and at the end of another acquisition time according to the embodiment of the present application;

fig. 7A is a schematic diagram of distribution of time for collecting report values by a sensor according to an embodiment of the present application;

FIG. 7B is a schematic diagram illustrating a distribution of time for collecting report values by another sensor according to an embodiment of the present application;

FIG. 7C is a schematic diagram of a collection time distribution of two sets of sensors according to an embodiment of the present application;

Fig. 8 is a schematic diagram of an electronic device according to an embodiment of the present application.

Detailed Description

The terms first, second, third and the like in the description and in the claims and in the drawings are used for distinguishing between different objects and not for limiting the specified order.

In embodiments of the application, words such as "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g." in an embodiment should not be taken as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

For clarity and conciseness in the description of the following embodiments, a brief description of the related art will be given first:

the screen ambient light detection means that the intelligent terminal display product passes through ambient light sensor, detects the illumination intensity of the ambient light incident on the intelligent terminal display product screen, and the processor can adjust the display screen backlight according to the ambient light illumination intensity detected, so can improve user's viewing experience and reduce the consumption.

In the prior art, in order to detect the illumination intensity of the ambient light incident on the screen of the intelligent terminal display product, the sum of the external environment of the screen and the luminous intensity of the screen is generally detected through an ambient light sensor, then the luminous intensity of the screen is calculated through a software algorithm, and the calculated luminous intensity of the screen is subtracted from the sum of the external ambient light intensity of the screen and the luminous intensity of the screen detected by the ambient light sensor, so that the external ambient light intensity of the screen is obtained. The method for calculating the screen luminescence by using the software algorithm is complex in calculation and high in power consumption. In addition, the detection accuracy of the scheme is greatly influenced by a screen, and the accuracy and the brightness uniformity of the screen gamma are strongly depended on, so that the detection result is easy to be inaccurate.

In view of this, an embodiment of the present application provides a method for detecting ambient light on a screen, which may be applied to an electronic device, where the method includes first collecting a collected value of light intensity of a screen in a first state and a collected value of light intensity of the screen in a second state, where the first state is that a screen area collected by a sensor is in a full bright state during a collection process; the second state is that the screen area acquired by the sensor is in an intermittent luminous state in the acquisition process; then calculating to obtain a screen luminous intensity value according to a relation between the screen luminous intensity obtained by pre-fitting and the light intensity of the screen in the first state and the light intensity of the screen in the second state; and obtaining the light intensity value of the screen environment light according to the acquired light intensity value of the screen in the first state and the light intensity value of the screen light. The electronic device then performs backlight adjustment of the screen based on the intensity value of the ambient light.

Thus, according to the acquired value of the light intensity of the acquired screen in two states and the calculation formula for calculating the light intensity value of the screen light emission, the light intensity value of the screen light emission is calculated.

In some embodiments, the electronic device may be a mobile phone, tablet, desktop, laptop, notebook, ultra mobile personal computer (Ultra-mobile Personal Computer, UMPC), handheld computer, netbook, personal digital assistant (Personal Digital Assistant, PDA), wearable electronic device, smart watch, etc., and the application is not limited in particular to the specific form of the above-described electronic device. In this embodiment, the structure of the electronic device may be shown in fig. 1A, and fig. 1A is a schematic structural diagram of the electronic device according to the embodiment of the present application.

As shown in fig. 1A, the electronic device may include a processor 110, an external memory interface 120, an internal memory 121, a universal serial bus (universal serial bus, USB) interface 130, a charge management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, keys 190, a motor 191, an indicator 192, a camera 193, a display 194, a user identification module (subscriber identification module, SIM) card interface 195, and the like. The sensor module 180 may include a pressure sensor 180A, a gyro sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

It is to be understood that the configuration illustrated in this embodiment does not constitute a specific limitation on the electronic apparatus. In other embodiments, the electronic device may include more or fewer components than shown, or certain components may be combined, or certain components may be split, or different arrangements of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

The processor 110 may include one or more processing units, such as: the processor 110 may include an application processor (application processor, AP), a modem processor, a graphics processor (graphics processing unit, GPU), an image signal processor (image signal processor, ISP), a controller, a video codec, a digital signal processor (digital signal processor, DSP), a baseband processor, and/or a neural network processor (neural-network processing unit, NPU), etc. Wherein the different processing units may be separate devices or may be integrated in one or more processors.

Wherein the different processing units may be separate devices or may be integrated in one or more processors. The controller can generate operation control signals according to the instruction operation codes and the time sequence signals to finish the control of instruction fetching and instruction execution.

A memory may also be provided in the processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that the processor 110 has just used or recycled. If the processor 110 needs to reuse the instruction or data, it can be called directly from the memory. Repeated accesses are avoided and the latency of the processor 110 is reduced, thereby improving the efficiency of the system.

In some embodiments, the processor 110 may include one or more interfaces. The interfaces may include an integrated circuit (inter-integrated circuit, I2C) interface, an integrated circuit built-in audio (inter-integrated circuit sound, I2S) interface, a pulse code modulation (pulse code modulation, PCM) interface, a universal asynchronous receiver transmitter (universal asynchronous receiver/transmitter, UART) interface, a mobile industry processor interface (mobile industry processor interface, MIPI), a general-purpose input/output (GPIO) interface, a subscriber identity module (subscriber identity module, SIM) interface, and/or a universal serial bus (universal serial bus, USB) interface, among others.

The I2C interface is a bi-directional synchronous serial bus comprising a serial data line (SDA) and a serial clock line (derail clock line, SCL). In some embodiments, the processor 110 may contain multiple sets of I2C buses. The processor 110 may be coupled to the touch sensor 180K, charger, flash, camera 193, etc., respectively, through different I2C bus interfaces. For example: the processor 110 may be coupled to the touch sensor 180K through an I2C interface, such that the processor 110 communicates with the touch sensor 180K through an I2C bus interface to implement a touch function of the electronic device 100.

The I2S interface may be used for audio communication. In some embodiments, the processor 110 may contain multiple sets of I2S buses. The processor 110 may be coupled to the audio module 170 via an I2S bus to enable communication between the processor 110 and the audio module 170. In some embodiments, the audio module 170 may transmit an audio signal to the wireless communication module 160 through the I2S interface, to implement a function of answering a call through the bluetooth headset.

PCM interfaces may also be used for audio communication to sample, quantize and encode analog signals. In some embodiments, the audio module 170 and the wireless communication module 160 may be coupled through a PCM bus interface. In some embodiments, the audio module 170 may also transmit audio signals to the wireless communication module 160 through the PCM interface to implement a function of answering a call through the bluetooth headset. Both the I2S interface and the PCM interface may be used for audio communication.

The UART interface is a universal serial data bus for asynchronous communications. The bus may be a bi-directional communication bus. It converts the data to be transmitted between serial communication and parallel communication. In some embodiments, a UART interface is typically used to connect the processor 110 with the wireless communication module 160. For example: the processor 110 communicates with a bluetooth module in the wireless communication module 160 through a UART interface to implement a bluetooth function. In some embodiments, the audio module 170 may transmit an audio signal to the wireless communication module 160 through a UART interface, to implement a function of playing music through a bluetooth headset.

The MIPI interface may be used to connect the processor 110 to peripheral devices such as a display 194, a camera 193, and the like. The MIPI interfaces include camera serial interfaces (camera serial interface, CSI), display serial interfaces (display serial interface, DSI), and the like. In some embodiments, processor 110 and camera 193 communicate through a CSI interface to implement the photographing functions of electronic device 100. The processor 110 and the display 194 communicate via a DSI interface to implement the display functionality of the electronic device 100.

The GPIO interface may be configured by software. The GPIO interface may be configured as a control signal or as a data signal. In some embodiments, a GPIO interface may be used to connect the processor 110 with the camera 193, the display 194, the wireless communication module 160, the audio module 170, the sensor module 180, and the like. The GPIO interface may also be configured as an I2C interface, an I2S interface, a UART interface, an MIPI interface, etc.

The USB interface 130 is an interface conforming to the USB standard specification, and may specifically be a Mini USB interface, a Micro USB interface, a USB Type C interface, or the like. The USB interface 130 may be used to connect a charger to charge the electronic device 100, and may also be used to transfer data between the electronic device 100 and a peripheral device. And can also be used for connecting with a headset, and playing audio through the headset. The interface may also be used to connect other electronic devices, such as AR devices, etc.

It should be understood that the interfacing relationship between the modules illustrated in the embodiments of the present application is only illustrative, and is not meant to limit the structure of the electronic device 100. In other embodiments of the present application, the electronic device 100 may also employ different interfacing manners in the above embodiments, or a combination of multiple interfacing manners.

The charge management module 140 is configured to receive a charge input from a charger. The charger can be a wireless charger or a wired charger. In some wired charging embodiments, the charge management module 140 may receive a charging input of a wired charger through the USB interface 130. In some wireless charging embodiments, the charge management module 140 may receive wireless charging input through a wireless charging coil of the electronic device 100. The charging management module 140 may also supply power to the electronic device through the power management module 141 while charging the battery 142.

The power management module 141 is used for connecting the battery 142, and the charge management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charge management module 140 to power the processor 110, the internal memory 121, the display 194, the camera 193, the wireless communication module 160, and the like. The power management module 141 may also be configured to monitor battery capacity, battery cycle number, battery health (leakage, impedance) and other parameters. In other embodiments, the power management module 141 may also be provided in the processor 110. In other embodiments, the power management module 141 and the charge management module 140 may be disposed in the same device.

The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. Each antenna in the electronic device 100 may be used to cover a single or multiple communication bands. Different antennas may also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed into a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution for wireless communication including 2G/3G/4G/5G, etc., applied to the electronic device 100. The mobile communication module 150 may include at least one filter, switch, power amplifier, low noise amplifier (low noise amplifier, LNA), etc. The mobile communication module 150 may receive electromagnetic waves from the antenna 1, perform processes such as filtering, amplifying, and the like on the received electromagnetic waves, and transmit the processed electromagnetic waves to the modem processor for demodulation. The mobile communication module 150 can amplify the signal modulated by the modem processor, and convert the signal into electromagnetic waves through the antenna 1 to radiate. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be provided in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating the low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then transmits the demodulated low frequency baseband signal to the baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then transferred to the application processor. The application processor outputs sound signals through an audio device (not limited to the speaker 170A, the receiver 170B, etc.), or displays images or video through the display screen 194. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 150 or other functional module, independent of the processor 110.

The wireless communication module 160 may provide solutions for wireless communication including wireless local area network (wireless local area networks, WLAN) (e.g., wireless fidelity (wireless fidelity, wi-Fi) network), bluetooth (BT), global navigation satellite system (global navigation satellite system, GNSS), frequency modulation (frequency modulation, FM), near field wireless communication technology (near field communication, NFC), infrared technology (IR), etc., as applied to the electronic device 100. The wireless communication module 160 may be one or more devices that integrate at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, modulates the electromagnetic wave signals, filters the electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, frequency modulate it, amplify it, and convert it to electromagnetic waves for radiation via the antenna 2.

In some embodiments, antenna 1 and mobile communication module 150 of electronic device 100 are coupled, and antenna 2 and wireless communication module 160 are coupled, such that electronic device 100 may communicate with a network and other devices through wireless communication techniques. The wireless communication techniques may include the Global System for Mobile communications (global system for mobile communications, GSM), general packet radio service (general packet radio service, GPRS), code division multiple access (code division multiple access, CDMA), wideband code division multiple access (wideband code division multiple access, WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long term evolution (long term evolution, LTE), BT, GNSS, WLAN, NFC, FM, and/or IR techniques, among others. The GNSS may include a global satellite positioning system (global positioning system, GPS), a global navigation satellite system (global navigation satellite system, GLONASS), a beidou satellite navigation system (beidou navigation satellite system, BDS), a quasi zenith satellite system (quasi-zenith satellite system, QZSS) and/or a satellite based augmentation system (satellite based augmentation systems, SBAS).

The electronic device 100 implements display functions through a GPU, a display screen 194, an application processor, and the like. The GPU is a microprocessor for image processing, and is connected to the display 194 and the application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. Processor 110 may include one or more GPUs that execute program instructions to generate or change display information.

The display screen 194 is used to display images, videos, and the like. The display 194 includes a display panel. The display panel may employ a liquid crystal display (liquid crystal display, LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (AMOLED) or an active-matrix organic light-emitting diode (matrix organic light emitting diode), a flexible light-emitting diode (flex), a mini, a Micro led, a Micro-OLED, a quantum dot light-emitting diode (quantum dot light emitting diodes, QLED), or the like. In some embodiments, the electronic device 100 may include 1 or N display screens 194, N being a positive integer greater than 1.

The electronic device 100 may implement photographing functions through an image signal processor (Image Signal Processor, ISP), a camera 193, a video codec, a GPU, a display screen 194, an application processor, and the like.

The ISP is used to process data fed back by the camera 193. For example, when photographing, the shutter is opened, light is transmitted to the camera photosensitive element through the lens, the optical signal is converted into an electric signal, and the camera photosensitive element transmits the electric signal to the ISP for processing and is converted into an image visible to naked eyes. ISP can also optimize the noise, brightness and skin color of the image. The ISP can also optimize parameters such as exposure, color temperature and the like of a shooting scene. In some embodiments, the ISP may be provided in the camera 193.

The camera 193 is used to capture still images or video. The object generates an optical image through the lens and projects the optical image onto the photosensitive element. The photosensitive element may be a charge coupled device (charge coupled device, CCD) or a Complementary Metal Oxide Semiconductor (CMOS) phototransistor. The photosensitive element converts the optical signal into an electrical signal, which is then transferred to the ISP to be converted into a digital image signal. The ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into an image signal in a standard RGB, YUV, or the like format. In some embodiments, electronic device 100 may include 1 or N cameras 193, N being a positive integer greater than 1.

The digital signal processor is used for processing digital signals, and can process other digital signals besides digital image signals. For example, when the electronic device 100 selects a frequency bin, the digital signal processor is used to fourier transform the frequency bin energy, or the like.

Video codecs are used to compress or decompress digital video. The electronic device 100 may support one or more video codecs. In this way, the electronic device 100 may play or record video in a variety of encoding formats, such as: dynamic picture experts group (moving picture experts group, MPEG) 1, MPEG2, MPEG3, MPEG4, etc.

The NPU is a neural-network (NN) computing processor, and can rapidly process input information by referencing a biological neural network structure, for example, referencing a transmission mode between human brain neurons, and can also continuously perform self-learning. Applications such as intelligent awareness of the electronic device 100 may be implemented through the NPU, for example: image recognition, face recognition, speech recognition, text understanding, etc.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to enable expansion of the memory capabilities of the electronic device 100. The external memory card communicates with the processor 110 through an external memory interface 120 to implement data storage functions. For example, files such as music, video, etc. are stored in an external memory card.

The internal memory 121 may be used to store computer executable program code including instructions. The internal memory 121 may include a storage program area and a storage data area. The storage program area may store an application program (such as a sound playing function, an image playing function, etc.) required for at least one function of the operating system, etc. The storage data area may store data created during use of the electronic device 100 (e.g., audio data, phonebook, etc.), and so on. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (universal flash storage, UFS), and the like. The processor 110 performs various functional applications of the electronic device 100 and data processing by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor, for example, by executing instructions to implement the method of screen ambient light detection in the present application.

The electronic device 100 may implement audio functions through an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, an application processor, and the like. Such as music playing, recording, etc.

The audio module 170 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be disposed in the processor 110, or a portion of the functional modules of the audio module 170 may be disposed in the processor 110.

The proximity light sensor 180G may include, for example, a Light Emitting Diode (LED) and a light detector, such as a photodiode. The light emitting diode may be an infrared light emitting diode. The electronic device 100 emits infrared light outward through the light emitting diode. The electronic device 100 detects infrared reflected light from nearby objects using a photodiode. When sufficient reflected light is detected, it may be determined that there is an object in the vicinity of the electronic device 100. When insufficient reflected light is detected, the electronic device 100 may determine that there is no object in the vicinity of the electronic device 100. The electronic device 100 can detect that the user holds the electronic device 100 close to the ear by using the proximity light sensor 180G, so as to automatically turn off the OLED display screen to achieve the purpose of saving power. The proximity light sensor 180G may also be used in holster mode, pocket mode to automatically unlock and lock the screen.

The ambient light sensor 180L is used to detect the screen brightness and the ambient light brightness, and the screen may be an OLED display screen in the embodiment of the present application. For example, in the embodiment of the present application, the ambient light sensor 180L collects the report value of the ambient light sensor 180L when the OLED display screen is at different brightness; according to the report value of the ambient light sensor 180L and a pre-constructed calculation formula of the luminous intensity of the OLED display screen under the condition that the OLED display screen is at different brightness, the ambient light intensity is calculated. The electronic device 100 may adaptively adjust the brightness of the display 194 based on the calculated ambient light level. Ambient light sensor 180L fingerprint sensor 180H is used to capture a fingerprint. The electronic device 100 may utilize the collected fingerprint feature to unlock the fingerprint, access the application lock, photograph the fingerprint, answer the incoming call, etc.

The keys 190 include a power-on key, a volume key, etc. The keys 190 may be mechanical keys. Or may be a touch key. The electronic device 100 may receive key inputs, generating key signal inputs related to user settings and function controls of the electronic device 100.

The operating system of the electronic device may employ a layered architecture, an event driven architecture, a microkernel architecture, a microservice architecture, or a cloud architecture. In the embodiment of the application, an Android system with a layered architecture is taken as an example, and the software structure of the electronic equipment is illustrated.

Fig. 1B is a software block diagram of an electronic device 100 according to an embodiment of the invention.

The layered architecture divides the software into several layers, each with distinct roles and branches. The layers communicate with each other through a software interface. In some embodiments, the Android system is divided into four layers, from top to bottom, an application layer, an application framework layer, an Zhuoyun row (Android run) and system libraries, and a kernel layer, respectively.

The application layer may include a series of application packages.

As shown in fig. 1B, the application package may include applications for cameras, gallery, calendar, talk, map, navigation, ambient light detection, WLAN, bluetooth, music, video, short message, etc.

The application framework layer provides an application programming interface (application programming interface, API) and programming framework for application programs of the application layer. The application framework layer includes a number of predefined functions.

As shown in FIG. 1B, the application framework layer may include a window manager, a content provider, a view system, a telephony manager, a resource manager, a notification manager, an ambient light detection algorithm module, and the like.

The window manager is used for managing window programs. The window manager can acquire the size of the display screen, judge whether a status bar exists, lock the OLED display screen, intercept the OLED display screen and the like.

The content provider is used to store and retrieve data and make such data accessible to applications. The data may include video, images, audio, calls made and received, browsing history and bookmarks, phonebooks, etc.

The view system includes visual controls, such as controls to display text, controls to display pictures, and the like. The view system may be used to build applications. The display interface may be composed of one or more views. For example, a display interface including a text message notification icon may include a view displaying text and a view displaying a picture.

The telephony manager is used to provide the communication functions of the electronic device 100. Such as the management of call status (including on, hung-up, etc.).

The resource manager provides various resources for the application program, such as localization strings, icons, pictures, layout files, video files, and the like.

The notification manager allows the application to display notification information in a status bar, can be used to communicate notification type messages, can automatically disappear after a short dwell, and does not require user interaction. Such as notification manager is used to inform that the download is complete, message alerts, etc. The notification manager may also be a notification in the form of a chart or scroll bar text appearing in the system top status bar, such as a notification of a background running application, or a notification appearing in the form of a dialog window on the OLED display. For example, a text message is prompted in a status bar, a prompt tone is emitted, the electronic device vibrates, and an indicator light blinks, etc.

The ambient light detection algorithm module can automatically detect the ambient light illumination intensity around the OLED display screen when a user lights the OLED display screen, and transmits the obtained ambient light illumination intensity to the processor so that the processor can carry out backlight adjustment of the OLED display screen.

Android run time includes a core library and virtual machines. Android run time is responsible for scheduling and management of the Android system.

The core library consists of two parts: one part is a function which needs to be called by java language, and the other part is a core library of android.

The application layer and the application framework layer run in a virtual machine. The virtual machine executes java files of the application program layer and the application program framework layer as binary files. The virtual machine is used for executing the functions of object life cycle management, stack management, thread management, security and exception management, garbage collection and the like.

The system library may include a plurality of functional modules. For example: surface 1 manager (surface manager), media Libraries (Media Libraries), three-dimensional graphics processing Libraries (e.g., openGL ES), 2D graphics engines (e.g., SGL), etc.

The surface manager is used to manage the display subsystem and provides a fusion of 2D and 3D layers for multiple applications.

Media libraries support a variety of commonly used audio, video format playback and recording, still image files, and the like. The media library may support a variety of audio and video encoding formats, such as MPEG4, h.264, MP3, AAC, AMR, JPG, PNG, etc.

The three-dimensional graphic processing library is used for realizing three-dimensional graphic drawing, image rendering, synthesis, layer processing and the like.

The 2D graphics engine is a drawing engine for 2D drawing.

The kernel layer is a layer between hardware and software. The inner core layer at least comprises a display driver, a camera driver, an audio driver and an ambient light sensor driver, wherein when a user makes the OLED display screen in a lighting state, the ambient light sensor driver acquires the illumination intensity of a light source, and the light source can comprise ambient light around the OLED display screen or light emitted by the OLED display screen.

In order to make the technical scheme of the application clearer and easier to understand, the electronic equipment provided by the embodiment of the application is described below by taking the electronic equipment as a mobile phone as an example.

When a user uses the display screen 194 of the electronic device, the ambient light sensor 180L acquires the ambient light sensor 180L report value of the OLED display screen in two states, and the ambient light sensor 180L is affected by ambient light and the luminous intensity of the display screen 194, so that after the acquired ambient light sensor 180L report value of the OLED display screen in two states is obtained, the luminous intensity of the display screen 194 needs to be calculated according to a calculation formula of the luminous intensity of the display screen 194, then the sensor report value caused by the luminous intensity of the display screen 194 is subtracted by the ambient light sensor 180L report value, and the ambient light sensor report value is obtained, and then the processor 110 calculates the luminous intensity of the ambient light according to the ambient light sensor report value.

As shown in fig. 2, fig. 2 shows a schematic view of a display screen 194 of an electronic device used by a user. For example, when a user clicks on an application program of the video 201 after the user turns on the display screen 194, the ambient light sensor 180L will collect the ambient light sensor 180L report that the OLED display screen is in the following two states:

when the first state requires that the OLED display screen dimming signal for controlling the brightness of the OLED display screen is scratched by the ambient light sensor 180L, the OLED display screen dimming signal is in a low-level state, and the low level of the OLED display screen dimming signal corresponds to the state that the OLED display screen is lightened, namely, the display screen area acquired in the acquisition process is in a full-brightness state relative to the ambient light sensor 180L; the display 194 is in a fully lit state;

the second state requires that when the OLED display dimming signal for controlling the brightness of the OLED display is scratched by the ambient light sensor 180L, the OLED display dimming signal is in a high level state, and the OLED display dimming signal is in a non-bright state corresponding to the high level state of the OLED display, that is, the display area collected in the collection process is in an intermittent light-emitting state relative to the ambient light sensor 180L.

Based on the change of the report value caused by the effect of the display screen 194 on the ambient light sensor 180L in the two states in the preset time period, the processor 110 can calculate the report value of the sensor caused by the light emission of the OLED display screen, further calculate the report value of the sensor caused by the ambient light, and further calculate the light emission intensity of the ambient light based on the report value of the sensor caused by the ambient light. In this manner, the processor may adjust the backlight of the display screen 194 based on the calculated ambient light illumination intensity to improve the user's viewing experience and reduce power consumption.

Of course, the above-described fig. 2 is merely an exemplary illustration of the case where the device configuration of the electronic device is a mobile phone. If the electronic device is a tablet computer, a handheld computer, a PDA, a wearable device (such as a smart watch, a smart bracelet), etc., the electronic device may include fewer structures than those shown in fig. 2, or may include more structures than those shown in fig. 2, which is not limited herein.

Embodiments of the present application will be illustrated by the following exemplary embodiments in conjunction with the accompanying drawings. The methods in the following embodiments may be implemented in an electronic device having the above-described hardware structure.

As shown in fig. 3, fig. 3 is a flowchart of a method for detecting ambient light of an OLED display screen according to an embodiment of the present application, which specifically includes the following steps:

s301, acquiring an acquisition value of light intensity of an OLED display screen in a first state and an acquisition value of light intensity of a screen in a second state, wherein the first state is that a screen area acquired by a sensor is in a full-bright state in an acquisition process; the second state is that the screen area collected by the sensor is in an intermittent luminous state in the collecting process.

In the embodiment of the application, taking the electronic device as the mobile phone as an example, the ambient light sensor 180L may be disposed in a motherboard below the OLED display screen of the mobile phone, and when the ambient light sensor 180L detects the ambient light value, the external ambient light is detected to be the ambient light incident on the ambient light sensor 180L through the OLED display screen. However, when ambient light detection is performed, the value of the ambient light sensor 180L can be influenced by the light emission of the OLED display screen, so that the sensor value of the OLED display screen in two states is collected, wherein the first state is that a screen area collected by the sensor is in a full-bright state in the collection process, and the second state is that the screen area collected by the sensor is in an intermittent light-emitting state in the collection process. The design is used for calculating the luminous numerical value of the OLED display screen subsequently.

S302, obtaining a screen luminous intensity value based on an acquisition value of the screen luminous intensity in a first state and an acquisition value of the screen luminous intensity in a second state according to a relation between the screen luminous intensity obtained by pre-fitting and the screen luminous intensity in the first state and the screen luminous intensity in the second state; the relation is obtained by fitting a plurality of groups of acquired values of light intensity of the screen in a first state and acquired values of light intensity of the screen in a second state, wherein the acquired values are acquired under the condition of no ambient light; the acquired value of the light intensity of the screen in the first state acquired under the condition of no ambient light is equal to the value of the luminous light intensity of the screen.

Before calculating the luminous intensity value of the OLED display screen and the luminous intensity value of the ambient light, a calculation formula for calculating the luminous intensity value of the OLED display screen is needed to be constructed, namely, a relation between the luminous intensity of the screen and the luminous intensity of the screen in a first state and the luminous intensity of the screen in a second state is needed to be constructed, and a specific construction process and a fitting process of parameters in the relation are specifically described in the following embodiments.

After the acquisition value of the light intensity of the OLED display screen in two states acquired by the ambient light sensor 180L is obtained, the light intensity value of the light emitted by the OLED display screen is calculated according to a relational expression obtained by fitting in advance.

S303, obtaining the light intensity value of the screen environment according to the acquired light intensity value of the screen in the first state and the light intensity value of the screen luminescence.

The light intensity value collected by the OLED display screen in the first state comprises the light intensity value of the OLED display screen and the light intensity value of the ambient light, so that the light intensity value of the OLED display screen can be subtracted according to the light intensity value of the OLED display screen in the first state, and the light intensity value of the ambient light is obtained. According to the embodiment of the application, different acquisition states are set, the ambient light sensor 180L acquires sensor report values of the OLED display screen in different states, then the luminous intensity value of the OLED display screen is calculated according to a pre-fitted relational expression for calculating the luminous intensity value of the OLED display screen, and then the luminous intensity value of the OLED display screen is subtracted by the luminous intensity value of the OLED display screen in the first state, so that the luminous intensity value of ambient light is obtained.

By utilizing the method in the embodiment of the application, the luminous intensity value of the screen is calculated according to the acquired value of the luminous intensity of the screen in two states and the calculation formula for calculating the luminous intensity value of the screen.

As shown in fig. 4, fig. 4 is a timing chart of an OLED display screen ambient light detection method according to an embodiment of the present application, which specifically includes the following steps:

s400, the user lights up the display screen.

When a user uses an electronic device, the user first needs to light a display screen, for example, when using a certain application program of the mobile phone, the mobile phone needs to be adjusted from a screen-off state to a state in which the display screen is lit.

S401, controlling the ambient light sensor 180L to collect the light intensity value of the ambient light under different states of the OLED display screen.

The processor controls the ambient light sensor 180L to collect the light intensity value of the ambient light of the OLED display screen in different states, wherein the first state is that the screen area collected by the sensor is in a full-bright state in the collection process, and the second state is that the screen area collected by the sensor is in an intermittent luminous state in the collection process. It will be appreciated that in the first state, the light source collected by ambient light sensor 180L includes ambient light and light emitted by the display screen; the OLED display screen being in the second state means that the display screen does not emit light within a period of time during which the display screen does not emit light, the ambient light sensor 180L only collects ambient light within a period of time during which the display screen does not emit light, and according to the two collection conditions, the light intensity value of the OLED display screen emitted light can be calculated according to the collection values obtained by the collection; because the OLED display is in the first state, the light source collected by the ambient light sensor 180L includes ambient light and light emitted by the display, so that the light intensity value emitted by the OLED display can be subtracted from the collected value obtained by the ambient light sensor 180L according to the OLED display being in the second state, and the obtained light intensity value is the light intensity value emitted by the ambient light.

S402, collecting a collection value of light intensity of the OLED display screen in a first state and collecting a collection value of light intensity of the OLED display screen in a second state.

When the OLED display screen is in a first state, the collected light source comprises ambient light and light emitted by the display screen; when the OLED display screen is in a first state, the collected light source only comprises ambient light in a part of time period.

S403, sending the acquired value of the light intensity of the OLED display screen in the first state and the acquired value of the light intensity of the OLED display screen in the second state to a processor.

And sending the acquired value of the light intensity of the OLED display screen in the first state and the acquired value of the light intensity of the screen in the second state to the processor for the processor to perform subsequent data processing.

S404, calculating the luminous intensity value of the OLED display screen according to the acquired value of the light intensity of the OLED display screen in the first state and the acquired value of the light intensity of the OLED display screen in the second state.

Before calculating the luminous intensity value of the OLED display screen, the embodiment of the application fits and calculates the relation of the luminous intensity value of the OLED display screen according to the acquired values of the luminous intensities of the multiple groups of screens in the first state and the acquired values of the luminous intensities of the screens in the second state, which are acquired under the condition of no ambient light. And calculating the luminous intensity value of the OLED display screen by using the fitted relation.

S405, calculating the luminous intensity value of the ambient light according to the acquired value of the luminous intensity of the OLED display screen in the first state and the luminous intensity value of the OLED display screen.

Because the collected value of the light intensity of the OLED display screen in the first state comprises the light intensity value of the OLED display screen and the light intensity value of the environment light, the collected value of the light intensity of the OLED display screen in the first state is subjected to difference with the light intensity value of the OLED display screen calculated according to the step S404, and the light intensity value of the environment light is obtained.

S406, adjusting the backlight of the display screen according to the light intensity value of the ambient light.

The following describes in detail how to construct a calculation formula for calculating the luminous intensity value of the OLED display screen.

The scheme of the embodiment of the application is based on the OLED display screen in the prior art, and accurate ambient light detection of the OLED display screen is realized according to the system design of the sensor. Firstly, the point to be described is that the refreshing signal of the OLED display screen is an EM signal, when the OLED display screen is refreshed, the EM signal can scan line by line, when the EM signal is at a high level, the OLED display screen does not emit light, and when the EM signal is at a low level, the OLED display screen emits light.

Taking an EM signal with a mode of multiple pulses as an example, referring to fig. 5, fig. 5 is a schematic diagram of a multi-pulse EM signal provided by an embodiment of the present application, a first high level signal of the EM signal performs refreshing of display screen data, after the refreshing of the data, an ambient light sensor 180L performs first ambient light collection, where the collection time is a first integration time, and in the collection process of the first integration time, it is required that the pixels of the row are in a bright state at the beginning and end of integration. Where n rows are determined by the number of rows that can affect the sensor. And the first integration time cannot cross the EM high level.

Referring to fig. 6A, fig. 6A is a schematic diagram of a position of an EM signal high level of an OLED display screen at the beginning and at the end of an acquisition time according to an embodiment of the present application. Fig. 6A shows that during the first integration period, the black bars of the OLED display screen do not cross the ambient light sensor 180L, i.e., the display screen is in a fully lit state during acquisition.

For the second integration time it is required that the row of pixels is in a bright state for n rows of pixels above and below at the start and end of the integration. And the second integration time must cross the EM high level. Referring to fig. 6B, fig. 6B is a schematic diagram illustrating a position of an EM signal high level of an OLED display screen at the beginning and the end of another acquisition time according to an embodiment of the present application. Fig. 6B shows that during the second integration period, the black bars of the OLED display screen span the ambient light sensor 180L, i.e., the display screen is in an intermittent light emitting state during the acquisition process.

The integration times of the two phases may be the same or different. For ambient light, the integration time has good linearity, can be normalized to the same integration time, and then processed. Normalization is understood as that the collected value of the light intensity of the screen in the first state or the collected value of the light intensity of the screen in the second state is amplified or reduced in the same proportion according to the proportional relation between the first duration and the second duration. In the embodiment of the application, the scheme is introduced by taking the same integration time of two stages as an example.

In the second acquisition stage, a row of pixels are taken as a study object, the light emission of the OLEDOLED display screen can be divided into three parts, and the first part is the left L1 of the EM high level. The 2 nd part is an EM high level part, the OLED display screen does not emit light at the moment, and if the OLED display screen emits light, the light-emitting brightness of the time period is LE. Part 3 is the right side L2 of the EM high-level part. It is considered that only the light of the n rows of the OLEDOLED display screens above and below the sensor has an effect on the sensor, and the rest can be ignored. The action light intensity of one channel of the sensor isThe display screen in the first acquisition stage has no EM high level, and the whole is luminous, so that the action light intensity of the whole on a certain channel of the sensor is as follows: />The first integration time T1 is the same as the second integration time T2, and the external environment brightness is unchanged, and the subtraction of the two integrals is obtained:physical meaning of this typeIt is the EM signal at the high level that would have a value of effect on the sensor if light was emitted during the high level time TEM. While LA and L may be read directly from ambient light sensor 180L. Since the display content is unchanged in the same frame, the brightness of each pixel point is not changed.

The intensity value of the light emitted by the display screen during the first acquisition phase can be determined, i.eI.e. LA-L _{Ambient light} = (T2/TEM) × (LA-L), L can also be obtained _{Ambient light} ＝LA-(T2/TEM)*(LA–L)。

Whereas LA, L in the above equation are known quantities that can be read directly from the sensor.

L can be known in the above process _{Ambient light} In linear relationship with LA and (LA-L), or under complete darkroom conditions, i.e., L _{Ambient light} In the case of 0, LA is linear with (LA-L). Namely the relation between the luminous intensity value of the OLED display screen and the difference value of the acquired values obtained in the two acquisition stages. Thus, the coefficient and the constant can be calculated through calibration in the two modes, and the light intensity value of the ambient light can be further obtained.

For example, different brightnesses of the OLED display screen are respectively set under the darkroom condition, LA and L are respectively recorded, la=m (LA-L) +n is fitted by a least square method, the equation is a relational equation between the luminous intensity of the screen and the light intensity of the screen in the first state and the light intensity of the screen in the second state, and the coefficient m and the constant n are obtained. Under a complete darkroom, the luminous intensity value of the LA=OLED display screen can be obtained according to the fitted relation under any light source, namely the luminous intensity value of the OLED display screen=m (LA-L) +n, the corresponding LA and L are brought into an equation, the luminous intensity value of the OLED can be calculated, and the luminous intensity value of the LA-OLED display screen is used as the luminous intensity value of the ambient light.

After the relation for calculating the luminous intensity value of the OLED is fitted, the luminous intensity value of the ambient light can be calculated according to the collected value of the luminous intensity of the OLED display screen in the first state and the collected value of the luminous intensity in the second state.

In some embodiments, when the ambient light sensor 180L collects the collected value of the light intensity of the OLED display in the first state and the collected value of the light intensity of the OLED display in the second state, if the EM signal adopts a mode of multiple pulses, as shown in fig. 7A, fig. 7A is a schematic diagram illustrating the distribution of the time for collecting the light intensity values by a sensor according to an embodiment of the present application. The OLED display generally refreshes the screen image when the first EM signal is at a high level, and the ambient light sensor 180L may perform two acquisitions after the first EM signal is at a high level, so that the light intensity values acquired by the two acquisitions are acquired when the OLED display is at a single image. At this time, the OLED display screen is not refreshed in the two collection processes, so that the collection value of the OLED display screen in the first state only needs to be collected once.

The ambient light sensor 180L is arranged to collect the collected values of the OLED display screen in two states under the condition that the OLED display screen is in the same picture, so that the influence of the change of the luminous intensity value of the OLED display screen on the result of calculating the luminous intensity value of the ambient light can be reduced.

In some embodiments, when the ambient light sensor 180L collects the collected value of the light intensity of the OLED display screen in the first state and the collected value of the light intensity in the second state, if the EM signal adopts a pulse mode, as shown in fig. 7B, fig. 7B is a schematic diagram of the distribution of the collection reporting time of another sensor according to the embodiment of the present application. The OLED display screen generally performs refreshing of the display screen when the first EM signal is at a high level, and the ambient light sensor 180L may perform two acquisitions before and after the first EM signal is at a high level, where the two acquisitions are respectively performed for a third duration and a fourth duration, where the third duration corresponds to the integration time 1 in fig. 7B, and the fourth duration corresponds to the integration time 3 in fig. 7B. And taking the average value of the acquired value of the OLED display screen in the first state in the third time period and the acquired value of the OLED display screen in the second state in the fourth time period as the acquired value of the light intensity of the OLED display screen in the first state. Because the first EM signal is collected twice before and after the high level, the OLED display screen is positioned on two pictures during the twice collection, and the error of the luminous intensity value of the OLED display screen caused by the difference of the display pictures of the OLED display screen can be reduced by taking the average value twice, and the calculated luminous intensity value of the ambient light is inaccurate. And the collected value of the light intensity of the OLED display screen in the first state is not specially processed.

In some embodiments, the ambient light sensor 180L has more than one channel, for example, the ambient light sensor 180L has R, G, B three channels, the ambient light values of the three channels may be obtained according to the method of obtaining the ambient light value of one channel in the above embodiments, and then the final ambient light value is obtained according to the relationship between the final ambient light value of the ambient light sensor 180L and the ambient light values of each channel, which is fitted in advance, that is, the target ambient light value. The relation is lux=ara+ bGA + cBA +d, where LUX is a target ambient light intensity value, a, B, c are coefficients, RA is an ambient light intensity value of the R channel, GA is an ambient light intensity value of the G channel, BA is an ambient light intensity value of the B channel, and d is a constant.

According to the method provided by the embodiment of the application, even if the ambient light sensor 180L has a plurality of channels, the final ambient light intensity value of the ambient light sensor 180L can be calculated quickly and conveniently.

In some embodiments, the first set of sensors may be utilized to collect the collected values of the light intensity of the screen in the first state while collecting the collected values of the light intensity of the screen in the first state and the collected values of the light intensity of the screen in the second state; and acquiring the acquired value of the light intensity of the screen in the second state by using the second group of sensors in the process of acquisition by the first group of sensors. The acquisition time of the two groups of sensors is shown in fig. 7C, and fig. 7C is a schematic diagram of acquisition time distribution of the two groups of sensors according to an embodiment of the present application. Under the condition that the acquisition OLED display screen is in the first state and the second state respectively, the acquisition time of the two groups of sensors can overlap, so that the detection error of the ambient light sensor 180L caused by the change of external ambient light can be reduced.

In some embodiments, when the collected value of the light intensity of the screen in the first state and the collected value of the light intensity of the screen in the second state are collected, two groups of sensors can be used for collecting, and the first group of sensors are used for collecting the collected value of the light intensity of the screen in the first state and the collected value of the light intensity of the screen in the second state respectively; respectively acquiring the acquired value of the light intensity of the screen in the first state by using a second group of sensors, and acquiring the acquired value of the light intensity of the screen in the second state; then taking the average value of the acquired value of the light intensity of the screen in the first state acquired by the first group of sensors and the acquired value of the light intensity of the screen in the first state acquired by the second group of sensors as the acquired value of the light intensity of the screen in the first state; and taking the average value of the acquired values of the light intensity of the screen in the second state acquired by the first group of sensors and the acquired value of the light intensity of the screen in the second state acquired by the second group of sensors as the acquired value of the light intensity of the screen in the second state. In this way, errors due to ambient light variations or the acquisition of the sensor itself can be avoided.

In some embodiments, in order to achieve that the ambient light sensor 180L can accurately capture that the OLED display screen is in the first state and the second state when the ambient light sensor is first acquired, a start time and an end time for acquiring sensor report values of the OLED display screen in the first state and the second state need to be set according to an EM dimming signal of the OLED display screen and a refresh signal of a pixel of the OLED display screen. The OLED display screen is in a first state, and can be collected for the first time and in a second state.

Based on the screen ambient light detection method provided by the embodiment, the embodiment of the application also provides an electronic device, and the method is specifically described below with reference to the accompanying drawings.

Referring to fig. 8, a schematic diagram of an electronic device according to an embodiment of the present application is shown.

The illustrated electronic device may be a mobile phone, a tablet computer, a desktop, a laptop, a notebook, a UMPC, a handheld computer, a netbook, a PDA, a wearable electronic device, a smart watch, etc., and the specific form of the electronic device is not particularly limited by the present application.

The hardware structure of the electronic device may be referred to fig. 1A and the related description, and the software structure of the electronic device may be referred to fig. 1B and the related description, which are not repeated herein.

The electronic device includes an ambient light sensor 180L, a processor 110, and a memory 121; the sensor is used for collecting light intensity values; one or more computer programs, including instructions, are stored in the memory; the processor is configured to execute the program code to implement the screen ambient light detection method described in the above embodiments.

Specifically, the ambient light sensor 180L collects a collected value of the light intensity of the screen in the first state and a collected value of the light intensity of the screen in the second state; memory 121 stores one or more computer programs, including instructions; the processor 110 calculates a screen luminous intensity value according to a acquired value of the screen luminous intensity in a first state acquired by the sensor and an acquired value of the screen luminous intensity in a second state acquired by the sensor and a relation between the screen luminous intensity obtained by pre-fitting and the screen luminous intensity in the first state and the screen luminous intensity in the second state; then calculating the light intensity value of the screen environment light according to the acquired value of the light intensity of the acquired screen in the first state and the light intensity value of the screen light emission; the backlight of the screen is then adjusted according to the ambient light intensity value of the screen.

In summary, with the electronic device provided by the embodiment of the present application, the light intensity value of the screen is calculated according to the collected values of the light intensities of the collected screens in two states and the calculation formula for calculating the light intensity value of the screen.

The present embodiment also provides a computer-readable storage medium including instructions that, when executed on an electronic device, cause the electronic device to perform the relevant method steps of fig. 4 to implement the method of the above embodiment.

The present embodiment also provides a computer program product comprising instructions which, when run on an electronic device, cause the electronic device to perform the relevant method steps as in fig. 4 to implement the method of the above embodiments.

It should be understood that in the present application, "at least one (item)" means one or more, and "a plurality" means two or more. "and/or" for describing the association relationship of the association object, the representation may have three relationships, for example, "a and/or B" may represent: only a, only B and both a and B are present, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, c may be single or plural.

The above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method of screen ambient light detection, the method comprising:

collecting a light intensity collecting value of a screen in a first state and a light intensity collecting value of the screen in a second state, wherein the first state is that a screen area collected by a sensor is in a full-bright state in a collecting process; the second state is that a screen area acquired by the sensor is in an intermittent luminous state in the acquisition process;

obtaining a screen luminous intensity value based on an acquisition value of the screen luminous intensity in a first state and an acquisition value of the screen luminous intensity in a second state according to a relation between the screen luminous intensity obtained by pre-fitting and the screen luminous intensity in the first state and the screen luminous intensity in the second state; the relation is obtained by fitting a plurality of groups of acquired values of light intensity of the screen in a first state and acquired values of light intensity of the screen in a second state, wherein the acquired values are acquired under the condition of no ambient light; the acquisition value of the light intensity of the screen in the first state acquired under the condition of no ambient light is equal to the value of the light intensity of the screen luminescence;

And obtaining the light intensity value of the screen environment light according to the acquired value of the light intensity of the screen in the first state and the light intensity value of the screen light.

2. The method of claim 1, wherein if the sensor collects the collected value of the light intensity of the screen in the first state for a first period of time and the collected value of the light intensity of the screen in the second state for a second period of time, and the first period of time is not equal to the second period of time, the method further comprises:

and amplifying or reducing the acquired value of the light intensity of the screen in the first state or the acquired value of the light intensity of the screen in the second state in the same proportion according to the proportional relation between the first duration and the second duration.

3. The method according to claim 1, wherein the acquiring the acquired value of the light intensity of the screen in the first state comprises:

and if the screen is refreshed in the process of collecting the light intensity collecting value of the screen in the first state and the light intensity collecting value of the screen in the second state, taking the average value of the light intensity collecting value of the screen in the first state collected by the sensor before the screen is refreshed and the light intensity collecting value of the screen in the first state collected by the sensor after the screen is refreshed as the light intensity collecting value of the screen in the first state.

4. The method of claim 1, wherein if the sensor has a plurality of channels, the method further comprises:

collecting the light intensity collecting values of other channel screens in a first state and the light intensity collecting values of other channel screens in a second state;

according to the relation, obtaining the luminous intensity values of the screens of the other channels based on the acquired value of the light intensity of the screens of the other channels in the first state and the acquired value of the light intensity of the screens of the other channels in the second state;

acquiring screen environment light intensity values of other channels according to the acquired light intensity values of the other channel screens in the first state and the luminous light intensity values of the other channel screens;

and obtaining the screen environment light intensity value of the sensor based on the screen environment light intensity value of each channel according to the relation between the screen environment light intensity value of each channel and the screen environment light intensity value of the sensor obtained by fitting in advance.

5. The method according to claim 1, wherein the step of collecting the collected value of the light intensity of the screen in the first state and the collected value of the light intensity of the screen in the second state comprises:

collecting the collected value of the light intensity of the screen in a first state by using a first group of sensors; and acquiring the acquired value of the light intensity of the screen in the second state by using the second group of sensors in the process of acquiring by the first group of sensors.

6. The method according to claim 1, wherein the step of collecting the collected value of the light intensity of the screen in the first state and the collected value of the light intensity of the screen in the second state comprises:

respectively acquiring the acquired value of the light intensity of the screen in a first state and the acquired value of the light intensity of the screen in a second state by using a first group of sensors;

respectively acquiring the acquired value of the light intensity of the screen in the first state by using a second group of sensors, and acquiring the acquired value of the light intensity of the screen in the second state;

taking the average value of the acquired value of the light intensity of the screen in the first state acquired by the first group of sensors and the acquired value of the light intensity of the screen in the first state acquired by the second group of sensors as the acquired value of the light intensity of the screen in the first state;

and taking an average value of the acquired value of the light intensity of the screen in the second state acquired by the first group of sensors and the acquired value of the light intensity of the screen in the second state acquired by the second group of sensors as the acquired value of the light intensity of the screen in the second state.

7. The method according to claim 1, wherein the method further comprises:

and setting the starting time and the ending time of the sensor for collecting the light intensity of the screen in the first state and the light intensity of the screen in the second state according to the dimming signal of the screen and the refreshing signal of the pixels of the screen.

8. An electronic device, comprising: a sensor, a processor, and a memory;

the sensor is used for collecting light intensity values;

wherein one or more computer programs are stored in the memory, the one or more computer programs comprising instructions; the instructions, when executed by the processor, cause the electronic device to perform the screen ambient light detection method of any one of claims 1-7.

9. A computer storage medium comprising computer instructions which, when run on an electronic device, perform the screen ambient light detection method of any one of claims 1-7.

10. A computer program product, characterized in that the computer performs the screen ambient light detection method according to any of claims 1-7 when the computer program product is run on a computer.