WO2020192455A1

WO2020192455A1 - Ambient light data collection method and electronic device

Info

Publication number: WO2020192455A1
Application number: PCT/CN2020/079382
Authority: WO
Inventors: 范继存; 康力; 李颖
Original assignee: 华为技术有限公司
Priority date: 2019-03-25
Filing date: 2020-03-14
Publication date: 2020-10-01
Also published as: CN110012162B; CN110012162A

Abstract

Provided in the present application are an ambient light data collection method and an electronic device, relating to the technical field of electronic devices, and used for reducing the data volume of collected ambient light data. The method is applied to an electronic device with an OLED display screen covering an ambient light sensor, and comprises: detecting a display synchronization signal; in response to the detected display synchronization signal, determining a first moment and a second moment, wherein the first moment is a starting moment of an LED in a display screen area corresponding to an ambient light sensor, the second moment is a shutting moment of the LED of the display screen area corresponding to the ambient light sensor, the first moment is earlier than the second moment, and the LED of the display screen area corresponding to the ambient light sensor is kept in a shut state between the first moment and the second moment; starting the ambient light sensor, wherein a starting moment of the ambient light sensor is not earlier than the first moment; and shutting the ambient light sensor, wherein a shutting time of the ambient light sensor is not later than the second time.

Description

Ambient light data collection method and electronic equipment

This application claims the priority of a Chinese patent application filed with the State Intellectual Property Office of China, the application number is 201910229473.1, and the invention title is "A method for collecting ambient light data and electronic equipment" on March 25, 2019, the entire content of which is by reference Incorporated in this application.

Technical field

This application relates to the technical field of electronic equipment, and in particular to an ambient light data collection method and electronic equipment.

Background technique

In some electronic devices that use organic light-emitting diode (OLED) displays such as mobile phones, tablets, cameras, and camcorders, it is usually necessary to detect the light intensity of the external environment through a light sensor, and according to the detected light intensity Adjust the automatic backlight brightness of the OLED display in electronic equipment.

When the ambient light intensity is detected, since the OLED display screen itself also emits light, in order to prevent the brightness of the OLED display screen from affecting the detection result, the following method is usually used for detection. Specifically, a light sensor with high sensitivity and high sampling rate is used to collect the ambient illuminance for a period of time at a high sampling rate, and by finding the minimum value among the detected multiple ambient illuminances, the non-OLED display can be obtained. The ambient illuminance of brightness interference.

However, the above-mentioned solutions have higher requirements on the performance of the light sensor, and the amount of environmental illuminance data collected at a high sampling rate is relatively large, which requires higher data processing capabilities of the electronic device.

Summary of the invention

This application provides a method and electronic equipment for collecting ambient light data, which are used to reduce the amount of collected ambient light data.

In order to achieve the above objectives, this application adopts the following technical solutions:

In the first aspect, a method for collecting ambient light data is provided, which is applied to an electronic device including an OLED display screen and an ambient light sensor. For example, the electronic device may be a mobile phone, a camera, etc., and the OLED display screen covers the ambient light sensor. The method includes: detecting a display synchronization signal, the display synchronization signal may be a synchronization signal when the display content is refreshed, such as a TE signal; in response to detecting the display synchronization signal, determining a first moment and a second moment, the first moment being an ambient light sensor When the LED of the corresponding display area is turned on, the second time is the turn-off time of the LED of the display area corresponding to the ambient light sensor. The first time is earlier than the second time, and the LED of the display area corresponding to the ambient light sensor is at the second time. Keep the off state between the first moment and the second moment; turn on the ambient light sensor so that the ambient light sensor starts to collect ambient light data, and the ambient light sensor is turned on no earlier than the first moment; turn off the ambient light sensor to make the ambient light The sensor ends collecting ambient light data, and the closing time of the ambient light sensor is no later than the second moment.

In the above technical solution, by detecting the display synchronization signal, the first time and the second time corresponding to when the LED of the display area corresponding to the ambient light sensor remains off are determined, so that only the LEDs in the display area corresponding to the ambient light sensor The ambient light data is collected when it is kept off, thereby avoiding the influence of the OLED display itself on the collected ambient light data and improving the signal-to-noise ratio of the ambient light data; in addition, this method does not require a high-performance ambient light sensor, And it can reduce the amount of collected ambient light data and reduce the data processing capability requirements of electronic devices.

In a possible implementation of the first aspect, determining the second moment includes: determining the second moment according to the moment when the display synchronization signal is detected and the position of the ambient light sensor on the OLED display screen. In the foregoing possible implementation manners, since the second moment is related to the display synchronization signal and the position of the ambient light sensor on the OLED display screen, a simple and effective way of determining the first moment is provided.

In a possible implementation of the first aspect, determining the second moment includes: determining the second moment according to the third moment and the position of the ambient light sensor on the OLED display screen; wherein the third moment is the detection of the display synchronization signal The first time is delayed by the first time. The first time is related to the single refresh time of the OLED display and the off time of the LED in the display area corresponding to the ambient light sensor. The single refresh time is related to the display area corresponding to the ambient light sensor. The off time of the LED is known. The foregoing possible implementation manners, since the second moment is related to the third moment and the position of the ambient light sensor on the OLED display screen, it provides another simple and effective way to determine the first moment.

In a possible implementation of the first aspect, the first duration is the difference between the single refresh duration of the OLED display screen and the turn-off duration of the LED in the display area corresponding to the ambient light sensor. The foregoing possible implementation manners provide a simple and effective way to determine the first duration.

In a possible implementation of the first aspect, turning off the LED in the display area corresponding to the ambient light sensor is used to refresh the next frame of the OLED display; and/or, the display area corresponding to the ambient light sensor Turning off the LED is used to adjust the brightness of the OLED display. In the foregoing possible implementation manners, the electronic device can use LEDs in the display area that are turned off when refreshing the next frame of the OLED display, and/or LEDs in the display area that are turned off when adjusting the brightness of the OLED display to collect the environment Light data, thereby improving the flexibility and diversity of the collected ambient light data, and at the same time can improve the stability of the collected ambient light data.

In a possible implementation of the first aspect, the duration between the turn-on time and the turn-off time is the turn-off duration of the LED in the display area corresponding to the ambient light sensor when the next frame of the OLED display screen is refreshed. In the above possible implementation manner, the electronic device can control the ambient light sensor to collect ambient light data by using the duration of the LED in the display area that is turned off during refresh during the refreshing process of the frame image of the OLED display, thereby avoiding the OLED display itself. The influence of luminescence on the collected ambient light data improves the signal-to-noise ratio of the ambient light data.

In a possible implementation of the first aspect, the length of time between the turn-on time and the turn-off time is the length of time that the LED in the display area corresponding to the ambient light sensor is turned off when the brightness of the OLED display is adjusted. In the above possible implementation manner, the electronic device can control the ambient light sensor to collect ambient light data during the brightness adjustment process of the OLED display screen by using the duration of the LED in the display area that is turned off during the brightness adjustment, thereby avoiding the OLED display itself. The influence of luminescence on the collected ambient light data improves the signal-to-noise ratio of the ambient light data.

In a possible implementation manner of the first aspect, the method further includes: turning on and off the ambient light sensor multiple times, so that the total duration of the ambient light sensor in the on state meets the preset collection duration. In the foregoing possible implementation manners, the signal-to-noise ratio of the ambient light data collected by the ambient light sensor can be further improved, thereby the stability of the ambient light data.

In a second aspect, an electronic device is provided. The electronic device includes a processor, an OLED display screen, and an ambient light sensor. The OLED display screen covers the ambient light sensor. The processor is configured to perform the following steps: detecting a display synchronization signal; When the display synchronization signal is detected, the first time and the second time are determined. The first time is the turn-on time of the LED in the display area corresponding to the ambient light sensor, and the second time is the turn-off of the LED in the display area corresponding to the ambient light sensor. When the first moment is earlier than the second moment, the LED in the display area corresponding to the ambient light sensor remains off between the first moment and the second moment; when the ambient light sensor is turned on, the ambient light sensor is turned on no earlier than the second moment. One moment: Turn off the ambient light sensor, and the turn off time of the ambient light sensor is no later than the second moment.

In a possible implementation manner of the second aspect, the processor is specifically configured to determine the second moment according to the moment when the display synchronization signal is detected and the position of the ambient light sensor on the OLED display screen.

In a possible implementation of the second aspect, the processor is specifically further configured to: determine the second time according to the third time and the position of the ambient light sensor on the OLED display screen; wherein, the third time is the detection of display synchronization The time of the signal is delayed by the time of the first duration, and the first duration is related to the single refresh duration of the OLED display screen and the turn-off duration of the LED in the display area corresponding to the ambient light sensor.

In a possible implementation of the second aspect, the first duration is the difference between the single refresh duration of the OLED display screen and the turn-off duration of the LED in the display area corresponding to the ambient light sensor.

In a possible implementation of the second aspect, turning off the LED of the display area corresponding to the ambient light sensor is used to refresh the next frame of the OLED display; and/or, the display area corresponding to the ambient light sensor Turning off the LED is used to adjust the brightness of the OLED display.

In a possible implementation of the second aspect, the duration between the turn-on time and the turn-off time is the turn-off duration of the LED in the display area corresponding to the ambient light sensor when the next frame of the OLED display screen is refreshed.

In a possible implementation of the second aspect, the time period between the on time and the off time is the off time of the LED in the display area corresponding to the ambient light sensor when the brightness of the OLED display is adjusted.

In a possible implementation manner of the second aspect, the processor is further specifically configured to: turn on and turn off the ambient light sensor multiple times, so that the total duration of the ambient light sensor in the on state meets the preset collection duration.

It is understandable that any electronic device provided above is used to execute the corresponding method provided above. Therefore, the beneficial effects that it can achieve can refer to the beneficial effects in the corresponding method provided above. I won't repeat it here.

Description of the drawings

FIG. 1 is a schematic structural diagram of an electronic device provided by an embodiment of the application;

2 is a schematic structural diagram of another electronic device provided by an embodiment of the application;

FIG. 3 is a schematic flowchart of the first ambient light data collection method provided by an embodiment of the application;

4 is a schematic diagram of a refreshed closed display area provided by an embodiment of the application;

5 is a schematic diagram of a display screen area with brightness adjustment turned off according to an embodiment of the application;

FIG. 6 is a schematic flowchart of a second ambient light data collection method provided by an embodiment of the application;

FIG. 7 is a working sequence diagram of the first OLED display screen provided by an embodiment of the application under different brightness;

FIG. 8 is a schematic flowchart of a third method for collecting ambient light data according to an embodiment of the application;

FIG. 9 is a working sequence diagram of the second OLED display screen provided by an embodiment of the application under different brightness;

FIG. 10 is a schematic flowchart of a fourth method for collecting ambient light data according to an embodiment of the application;

FIG. 11 is a working sequence diagram of a third OLED display screen provided by an embodiment of the application under different brightness.

detailed description

In this application, "at least one" refers to one or more, and "multiple" refers to two or more. "And/or" describes the association relationship of the associated objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, both A and B exist, and B exists alone, where A, B can be singular or plural. "The following at least one item (a)" or similar expressions refers to any combination of these items, including any combination of a single item (a) or plural items (a). For example, at least one of a, b, or c can represent: a, b, c, a-b, a-c, b-c, or a-b-c, where a, b, and c can be single or multiple. The character "/" generally indicates that the associated objects are in an "or" relationship. In addition, in the embodiments of the present application, words such as "first" and "second" do not limit the number and execution order.

It should be noted that in this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or illustrations. Any embodiment or design solution described as "exemplary" or "for example" in this application should not be construed as being more preferable or advantageous than other embodiments or design solutions. To be precise, words such as "exemplary" or "for example" are used to present related concepts in a specific manner.

Figure 1 is a schematic structural diagram of an electronic device provided by an embodiment of the application. The electronic device may be a mobile phone, a tablet computer, a computer, a wearable device, a vehicle-mounted device, an electronic terminal, a portable terminal, etc. For ease of description, this application implements Collectively referred to as electronic devices in the examples. Taking the electronic device as a mobile phone as an example, the structure of the electronic device will be described as an example.

Referring to FIG. 1, the mobile phone may include: an RF (radio frequency, radio frequency) circuit 110, a memory 120, other input devices 130, a display screen 140, a sensor component 150, an audio circuit 160, input/output (input/output, I/O) ) Components such as subsystem 170, processor 180, and power supply 190. Wherein, the processor 180 is respectively connected to the RF circuit 110, the memory 120, the audio circuit 160, and the power supply 190. The I/O subsystem 170 is respectively connected to other input devices 130, an organic light-emitting diode (OLED) display screen 140, and a sensor component 150.

Among them, the RF circuit 110 can be used for receiving and transmitting information or signals during a call. Generally, the RF circuit 110 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, an LNA (low noise amplifier, low noise amplifier), a duplexer, and the like. In addition, the RF circuit 110 may also communicate with the network and other devices through wireless communication, such as communicating with an access network device through a WiFi network.

The memory 120 may be used to store software programs and modules. The processor 180 executes various functional applications and data processing of the mobile phone by running the software programs and modules stored in the memory 120. The memory 120 may mainly include a program storage area and a data storage area. The program storage area may store an operating system, an application program required by at least one function, etc.; the storage data area may store data created based on the use of the mobile phone (such as audio Data, image data, phone book, etc.) etc. In addition, the memory 120 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, a flash memory device, or other volatile solid-state storage devices.

The other input device 130 can be used to receive input digital or character information, and generate key signal input related to the user settings and function control of the mobile phone. The other input device 130 may include, but is not limited to, one or more of a physical keyboard, function keys (such as a volume control button, a power switch button, etc.), a trackball, a mouse, and a joystick.

The OLED display screen 140 can be used to display information input by the user or information provided to the user and various menus of the mobile phone, and can also accept user input. The OLED display screen 140 can include a display panel 141 and a touch panel 142. In the embodiment of the present application, the display panel 141 in the OLED display screen 104 may be configured in the form of an OLED. For example, the display panel 141 may include an OLED array, which includes multiple rows and multiple columns of OLEDs.

The sensor component 150 includes one or more sensors for providing various aspects of the state evaluation of the mobile phone. In the embodiment of the present application, the sensor component 150 may include an ambient light sensor for collecting data such as ambient light intensity to adjust the automatic backlight brightness of the OLED display 140. Further, the sensor component 150 may also include a temperature sensor, an acceleration sensor, a gyroscope sensor, a magnetic sensor or a pressure sensor. The temperature change of the mobile phone, the acceleration/deceleration, the orientation, and opening/closing of the mobile phone can be detected by the sensor assembly 150. Status, or relative positioning of components, etc. In addition, the sensor component 150 may also include a CMOS or CCD image sensor for use in imaging applications.

The audio circuit 160 can provide an audio interface between the user and the mobile phone. For example, the audio circuit 160 provides an audio interface between the user and the mobile phone through a speaker and a microphone. Among them, the audio circuit 160 can transmit the electrical signal converted from the received audio data to the speaker, which is converted into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit The audio data is converted into audio data, and then the audio data is output to the RF circuit 110 to be sent to, for example, another mobile phone, or the audio data is output to the memory 120 for further processing.

The I/O subsystem 170 is used to control input and output external devices. The external devices may include other device input controllers, sensor controllers, display controllers, and so on.

The processor 180 is the control center of the mobile phone. It uses various interfaces and lines to connect various parts of the entire mobile phone. By running or executing software programs and/or modules stored in the memory 120, and calling data stored in the memory 120, Perform various functions of the mobile phone and process data to monitor the mobile phone as a whole. Optionally, the processor 180 may include one or more processing units; for example, the processor 180 may integrate an application processor (AP) and a modem (modem), where the application processor mainly processes operations For systems, user interfaces and applications, the modem processor mainly deals with wireless communication. It can be understood that the foregoing modem processor may not be integrated into the processor 180.

The power source 190 (such as a battery) is used to power the above-mentioned various components. Among them, the power supply can be logically connected to the processor 180 through a power management system, so that functions such as charging, discharging, and power consumption can be managed through the power management system.

In the embodiment of the present application, the positional relationship between the OLED display screen 140 and the ambient light sensor 151 included in the mobile phone may be as shown in FIG. 2, that is, the OLED display screen 140 may cover the ambient light sensor 151. Among them, the ambient light sensor 151 can be covered by the top of the OLED display 140, or by the middle part of the OLED display 140, or by the bottom of the OLED display 140. In FIG. 2, the ambient light sensor 151 is covered by the OLED display. Take the top cover of 140 as an example for illustration. In addition, the mobile phone may be a full-screen mobile phone or not a full-screen mobile phone, which is not specifically limited in the embodiment of the present application.

Those skilled in the art can understand that the structure of the mobile phone shown in FIG. 1 does not constitute a limitation on the mobile phone, and may include more or less components than those shown in the figure, or a combination of certain components, or different component arrangements.

FIG. 3 is a schematic flowchart of the first ambient light data collection method provided by an embodiment of the application. The method can be applied to the electronic device described above, in which the OLED display screen covers the ambient light sensor The method can be specifically executed by the processor in the electronic device. Referring to FIG. 3, the method includes the following steps.

S301: Detect a display synchronization signal, where the display synchronization signal is a synchronization signal when the display content is refreshed.

Among them, the OLED display screen is refreshed and displayed in the form of frame by frame when displaying images, videos, etc., and the refresh display of each frame can be refreshed line by line in the order from top to bottom. Therefore, the display content of one frame needs to be refreshed multiple times. During the refreshing process of one frame, the LED of the display area that is refreshed each time is turned from on to off, that is, the corresponding area becomes black, and then the refreshed content is displayed in the display area. When the OLED display screen finishes refreshing the display content of a whole frame, it will output a display synchronization signal, which can be used to indicate that the display content refresh of the frame is completed.

Specifically, during the refresh display process of the OLED display, the processor of the electronic device may detect the display synchronization signal output by the OLED display. The display synchronization signal may specifically be a tearing effect (TE) signal, or other Signals synchronized with the refresh of the display content, etc.

S302: In response to detecting the display synchronization signal, determine the first time and the second time. The first time is the turn-on time of the LED of the display area corresponding to the ambient light sensor, and the second time is the display area corresponding to the ambient light sensor. When the LED is turned off, the first time is earlier than the second time, and the LED in the display area corresponding to the ambient light sensor remains off between the first time and the second time.

Among them, the LED in the display area corresponding to the ambient light sensor may specifically refer to the LED in the OLED display screen covering the display area above the ambient light sensor. The status of the LED in the display area is related to the accuracy of the ambient light data collected by the ambient light sensor. Specifically, when the LED of the display area corresponding to the ambient light sensor is in the on state (also called the lit state), the ambient light data collected by the ambient light sensor will be affected because the LED in the display area is on. Impact, that is, the collected ambient light data will include both the ambient light data and the LED light data in the display area; when the LED in the display area corresponding to the ambient light sensor is off, the ambient light sensor collects The ambient light data will not be affected, that is, the collected ambient light data only includes the light data of the surrounding environment. Therefore, in order to ensure that the ambient light data collected by the ambient light sensor will not be affected, the electronic device can determine the time period when the LED of the display area corresponding to the ambient light sensor is in the off state, that is, determine the first moment and the second moment. time.

In addition, during the display process of the OLED display, at least two situations need to turn off the LEDs in the display area for a period of time. These two situations include the refreshing process of the displayed content and the brightness adjustment process of the OLED display. This situation is introduced.

The first is the refreshing process of the displayed content.

Among them, it is mentioned in the above S301 that during the refreshing process of one frame, each refreshed display area will first become black, and then the refreshed content will be displayed in the refreshed display area. The first change to black is specifically achieved by turning off the LEDs of the refreshed display area, that is, the LEDs of the refreshed display area are in the off state, which is subsequently referred to as the refreshed off display area. When the refresh-off display area is moved to the display area corresponding to the ambient light sensor (that is, the LED of the display area corresponding to the ambient light sensor is turned off to refresh the next frame of the OLED display, as shown in Figure 4 Show), the first time and the second time are determined, and the period between the first time and the second time is the time period during which it is determined that the LED of the display screen area whose refresh is off is off.

In addition, in the process of refreshing the display content of the same frame, the display synchronization signal is the signal output by the OLED display screen when the refreshing of the display content of the whole frame is completed, and the turning off time of the LED in the display area where the refresh is turned off is also completed. The moment when the display content of this entire frame is refreshed, that is, for the same frame, the display synchronization signal corresponding to the frame and the turn-off moment of the LED of the display screen area where the refresh is turned off are synchronized. Therefore, based on this synchronization relationship, the turning off time of the LED of the display screen area whose refresh is turned off can be determined.

In a possible implementation, when the LED of the display screen area whose refresh is turned off is the LED of the display screen area corresponding to the ambient light sensor, determining the second moment may include: according to the moment when the display synchronization signal is detected and The location of the ambient light sensor on the OLED display determines the second moment. Specifically, the electronic device may determine the second moment according to the time when the display synchronization signal is detected, the single refresh duration of the OLED display screen, and the position of the ambient light sensor on the OLED display screen. The time when the display synchronization signal is detected here may refer to the time when the display synchronization signal is detected when the refresh of the first frame is completed, and the second time may refer to the LED in the display area where the refresh is turned off during the refresh process of the second frame. At the moment of closing, the second frame is the next frame adjacent to the first frame.

Among them, the single refresh time of the OLED display is related to the refresh frequency of the OLED display. The refresh frequency of the OLED display is constant. For example, the refresh frequency of the OLED display is 60 Hz, so the single refresh time is approximately equal to 16.667 milliseconds (ms). The location of the ambient light sensor on the OLED display can be specifically used to determine the time required for the refresh-off display area to move from the top of the OLED display to the display area corresponding to the ambient light sensor, which will be referred to as the first movement duration in the following For example, the first movement duration can be equal to L/V1, L represents the length of the ambient light sensor from the top of the OLED display, V1 represents the movement speed of the display area where the refresh is off, and the movement speed V1 can be equal to the OLED display The ratio of the length of the OLED display to the single refresh time.

Exemplarily, assuming that the first movement duration is T _S1 and the single refresh duration is T _f , the electronic device may delay the time when the display synchronization signal is detected by the single refresh duration T _f , if the first movement duration T _S1 is zero, the second time may be obtained directly, when the first mobile _Sl duration T is not zero, the delay may be single refresh time T again after the long delay T _f _Sl, to obtain a second time. Further, after the second moment is determined, the first moment may be determined according to the off duration of the LEDs in the refresh-off display area, and the off duration T _b1 of the LEDs in the refresh-off display area is controlled by the electronic device, namely The closing time T _b1 is known, and the electronic device advances the second time by the closing time T _b1 to determine the first time.

The second is the brightness adjustment process of the OLED display.

Among them, the brightness adjustment of the OLED display screen can include two working modes, namely pulse-width modulation (PWM) mode and non-PWM mode. In the PWM mode, a duty cycle adjustment signal (for example, the duty cycle The adjustment signal can be a square wave signal with a frequency of 240 Hz), and no duty cycle adjustment signal is required in non-PWM mode. The PWM mode can mean that when the brightness of the OLED display is low, the lighting time of the LED in the OLED display is controlled by PWM to realize the brightness adjustment of the OLED display. In this working mode, there will be LEDs in the display area. After being in the off state for a period of time, the LED in the display area will be referred to as the LED in the display area with the brightness adjustment turned off. Non-PWM mode can mean that when the brightness of the OLED display is high, the brightness adjustment can no longer be achieved through the PWM mode. The brightness adjustment of the OLED display can only be achieved by increasing the power supply current and other methods. The LED in the display area is turned off for a period of time, that is, there is no LED in the display area where the brightness adjustment is turned off. Therefore, when the display area whose brightness adjustment is turned off moves to the display area corresponding to the ambient light sensor (that is, the LED of the display area corresponding to the ambient light sensor is turned off to adjust the brightness of the OLED display), the first moment is determined And the second moment is the time period in which it is determined that the LED of the display screen area whose brightness adjustment is turned off is in the off state.

It should be noted that during the brightness adjustment process of the same frame, there will be evenly distributed one or more display areas with the brightness adjustment turned off in the above PWM mode, and one or more display areas with the brightness adjustment turned off will be in different Move to the display area corresponding to the ambient light sensor. The number N of the display area where the brightness adjustment is turned off is related to the frequency of the duty cycle adjustment signal and the refresh frequency of the OLED display. The value of N can be specifically equal to the ratio of the two. For example, the refresh frequency is 60 Hz. The frequency of the duty cycle adjustment signal is 240 Hz, and the number of display areas where the brightness adjustment is turned off can be 4 (N=240/60=4), which can be specifically shown in Figure 5, which is represented as the first Three of the closed area, the second closed area, the third closed area, and the fourth closed area are used for brightness adjustment only, and the other closed area is used both for refreshing the display content and for brightness adjustment.

In addition, in the process of refreshing and adjusting the brightness of the display content of the same frame, the display synchronization signal is the signal output by the OLED display screen when the refreshing of the display content of the whole frame is completed. The closing time is also the time when the refreshing of the display content of the entire frame is completed, that is, for the same frame, the display synchronization signal corresponding to the frame and the closing time of the LED of the display screen area whose brightness adjustment is turned off are synchronized. Therefore, based on this synchronization relationship, the turn-off time of the LED of the display screen area whose brightness adjustment is turned off can be determined.

In a possible implementation manner, when the LED of the display screen area whose brightness adjustment is turned off is the LED of the display screen area corresponding to the ambient light sensor, determining the second time may include: according to the time when the display synchronization signal is detected And the location of the ambient light sensor on the OLED display to determine the second moment. Specifically, the electronic device may determine the second moment according to the time when the display synchronization signal is detected, the single refresh duration of the OLED display screen, and the position of the ambient light sensor on the OLED display screen. The time when the display synchronization signal is detected here may refer to the time when the display synchronization signal is detected when the refresh of the first frame is completed, and the second time may refer to the display area where the brightness adjustment is turned off during the brightness adjustment of the second frame. When the LED is turned off, the second frame is the next frame of the first frame. It should be noted that when there are multiple display screen areas whose brightness adjustment is turned off, one second moment may be determined, or multiple second moments may be determined.

Among them, the single refresh time of the OLED display screen is known. The location of the ambient light sensor on the OLED display screen can be specifically used to determine the time required for the display area with the brightness adjustment turned off to move from the top of the OLED display to the display area corresponding to the ambient light sensor, which will be referred to as second movement in the following duration.

Exemplarily, assuming that the second movement duration is T _S2 and the single refresh duration is T _f , the electronic device may delay the detection of the display synchronization signal by the single refresh duration T _f (ie T _f *i/N, the value of i can be 1 to N), if the second movement duration T _S2 is zero, multiple second moments can be directly obtained, if the second movement duration T _{S2 is} not zero, Then, the time after the delay of T _f *i/N can be further delayed by T _S2 to obtain a plurality of second moments. Further, after multiple second moments are determined, the corresponding multiple first moments can be determined according to the turn-off duration T _b2 of the LEDs of the display screen area whose brightness adjustment is turned off. The duration T _{b2 is} determined by the brightness of the OLED display. The brightness of the OLED display is controlled by the electronic device. That is, the electronic device can directly determine the off duration T _b2 through the brightness. The electronic device advances the first moments by the The closing time T _b2 can determine the corresponding multiple first moments.

Exemplarily, assuming that the refresh frequency is 60 Hz, the frequency of the duty cycle adjustment signal is 240 Hz, and the four display areas with brightness adjustment turned off are the first closed area, the second closed area, and the third in FIG. 5, respectively. For example, when the second moving time T4 is zero for the closed area and the fourth closed area, the first closed area, the second closed area, the third closed area, and the fourth closed area move to the display area corresponding to the ambient light sensor The first times are (1/4)*T _f , (1/2)*T _f , (3/4)*T _f and T _f , and the corresponding multiple first moments are (1/4) *T _f -T _b2 , (1/2)*T _f -T _b2 , (3/4)*T _f -T _b2 and T _f -T _b2 .

S303: Turn on and turn off the ambient light sensor, the turn-on time of the ambient light sensor is not earlier than the first moment, and the turn-off time of the ambient light sensor is not later than the second moment.

After determining the first moment and the second moment, the electronic device may turn on the ambient light sensor according to the first moment, and after the ambient light sensor collects ambient light data for a period of time, turn off the ambient light sensor according to the second moment. For example, the processor of the electronic device sends a turn-on signal to the ambient light sensor at a certain time not earlier than the first moment, so that the ambient light sensor starts to collect ambient light data when it receives the turn-on signal, and when it is not too late Sending an end signal to the ambient light sensor at a certain moment of the second moment, so that the ambient light sensor stops collecting ambient light data when receiving the end signal. After that, the processor of the electronic device can also buffer the ambient light data collected by the ambient light sensor, and adjust the backlight brightness of the OLED display screen according to the collected ambient light data.

Specifically, the electronic device can control the ambient light to be turned on and off within a specified time period between the first time and the second time. The specified time period is the time from when the ambient light sensor is turned on to the time when the ambient light sensor is turned off. The time length of the optical data), the specified time length may be less than the time length from the first time to the second time, or may be equal to the time length from the first time to the second time. Exemplarily, the electronic device may turn on the ambient light sensor at the first moment and turn off the ambient light sensor at the second moment. At this time, the specified duration is equal to the duration from the first moment to the second moment; or, the electronic device is in the first moment. The ambient light sensor is turned on at a certain time after a time, and the ambient light sensor is turned off at a certain time before or at the second time. At this time, the specified time period is less than the time period from the first time to the second time; or The electronic device turns on the ambient light sensor at the first time or at a time after the first time, and turns off the ambient light sensor at a time before the second time. At this time, the specified duration is also less than the time from the first time to the second time. duration.

It should be noted that the specified duration can be configured in advance, and the specified duration can be configured as a fixed value (for example, the specified duration can be 200us or 300us, etc.), or it can be configured as a variable value. The value of can be related to the off time of the LED in the display area corresponding to the ambient light sensor.

Optionally, the specified duration is the off duration of the LED in the display area corresponding to the ambient light sensor when the next frame of image of the OLED display is refreshed. That is, in the first case of S302, the LEDs in the display area where the refresh is turned off are the LEDs in the display area corresponding to the ambient light sensor. At this time, the off duration of the LEDs in the display area corresponding to the ambient light sensor It is the off duration of the LED in the display area where the refresh is off, so the specified duration can be specifically the off duration of the LED in the refresh off display area. For example, the specified duration can be the refresh off as shown in Figure 4 above. The off time of the LED in the display area.

Or, the specified duration is the off duration of the LED in the display area corresponding to the ambient light sensor when the brightness of the OLED display is adjusted. That is, in the second case of S302, the LED in the display area whose brightness adjustment is turned off is the LED in the display area corresponding to the ambient light sensor. At this time, the LED in the display area corresponding to the ambient light sensor is turned off. The duration is the off duration of the LEDs in the display area where the brightness adjustment is turned off, so the specified duration may specifically be the off duration of the LEDs in the display area where the brightness adjustment is off. For example, the specified duration may be as shown in Figure 5 above. The off duration of the LEDs in each of the four off areas.

Further, the electronic device can also turn on and off the ambient light sensor multiple times, so that the total time that the ambient light sensor is in the on state (that is, the total collection time) meets the preset collection time, that is, it controls the ambient light sensor to collect ambient light data. The total duration is the preset acquisition duration, and the preset acquisition duration may include multiple designated durations within a single refresh duration of one or more frames, and each frame may correspond to one or more designated durations. By turning on and off the ambient light sensor multiple times, the total collection time of the ambient light sensor can meet the preset collection time, which can improve the signal-to-noise ratio of the ambient light data collected by the ambient light sensor, thereby increasing the ambient light data collected by the ambient light sensor At the same time, the requirements for the sensitivity and sampling rate of the ambient light sensor are relatively low.

For ease of understanding, the following uses the display synchronization signal as the TE signal, and the ambient light sensor is located at the top of the OLED display screen (that is, the first movement duration T _S1 and the second movement duration T _{S2 are} zero), and the refresh frequency of the OLED display When the frequency is 60 Hz, the duty cycle adjustment signal may be 240 Hz, and the brightness of the OLED display screen is low, medium, and high. As an example, the method provided in the embodiment of the present application will be illustrated. Lower brightness and medium brightness are two examples of brightness when OLED display screens work in PWM mode, and higher brightness is an example of brightness when OLED display screens work in non-PWM mode.

Exemplarily, as shown in FIG. 6, the method may include: S401. Detecting a TE signal; S402. In response to detecting the TE signal, delaying the detection of the TE signal by T _f- T ₀ , where T _f represents a single time Refresh duration, T ₀ means the first designated duration; S403. Turn on the ambient light sensor, after the first designated duration T ₀ , turn off the ambient light sensor, that is, control the ambient light sensor to collect ambient light data within the first designated duration T ₀ ; S404. Acquire ambient light data and total collection time; S405. Cache ambient light data; S406. Determine whether the total collection time reaches the preset collection time. If the total collection time reaches the preset collection time, it ends. If the total collection time does not reach The preset collection duration returns to S401 to continue execution.

Based on the method provided in FIG. 6 above, the working sequence diagrams of the OLED display screen having the brightness of lower brightness, medium brightness and higher brightness can be as shown in FIG. 7. In Figure 7, the LED in the display area corresponding to the ambient light sensor is in the off state, which can be specifically the situation shown in Figure 4 above. At this time, the ambient light sensor only collects a first specified duration T within a single refresh duration T _f . _For ambient light data of ₀ , the first specified duration T ₀ can be configured as a fixed value. Wherein, when the brightness of the OLED display screen is low brightness and medium brightness, the first specified time period T _{0 is} less than the off time of the LED in the display area corresponding to the ambient light sensor; the brightness of the OLED display screen is high brightness When, the specified duration is equal to the off duration of the LED in the display area corresponding to the ambient light sensor.

Or, as shown in FIG. 8, the method may include: S501. Detect TE signal; S502. Determine whether the OLED display screen is working in PWM mode, if not, perform according to S402-S403 provided in FIG. The method provided in Figure 6 is executed), if yes, the following S503a and S503b are executed; S503a. In response to detecting the TE signal, delay the time of detecting the TE signal by (1/4)*T _f -T ₀ , ( 1/2)*T _f -T ₀ , (3/4)*T _f -T ₀ and T _f -T ₀ ; S503b. Control the ambient light sensor to delay (1/4)*T _f -T ₀ , (1/2)*T _f -T ₀ , (3/4)*T _f -T ₀ and T _f -T ₀ after the first designated period of time T ₀ to collect ambient light data; S504. Acquire ambient light data and Total collection time; S505. Cache ambient light data; S506. Determine whether the total collection time reaches the preset collection time. If the total collection time reaches the preset collection time, it ends. If the total collection time does not reach the preset collection time, return to S501 to continue carried out.

Based on the method provided in FIG. 8, the working sequence diagrams of the OLED display screen at low brightness, medium brightness, and high brightness can be as shown in FIG. 9. In Figure 9, when the brightness of the OLED display screen is low and medium brightness, the LED in the display area corresponding to the ambient light sensor is in the off state, which can specifically refer to the situation shown in Figure 5 above. The light sensor collects four ambient light data within the first designated time period T ₀ within a single refresh time T _f ; when the brightness of the OLED display is high, the LED in the display area corresponding to the ambient light sensor is turned off The state can be specifically as shown in FIG. 4 above. In addition, when the brightness of the OLED display screen is low brightness and medium brightness, the first specified duration T _{0 is} less than the off duration of the LED in the display area corresponding to the ambient light sensor; the brightness of the OLED display screen is high brightness When, the first designated duration T ₀ designated duration is equal to the off duration of the LED of the display area corresponding to the ambient light sensor.

Or, as shown in FIG. 10, the method may include: S601. Detect TE signal; S602. Determine whether the OLED display screen is working in PWM mode, if not, perform according to S402-S403 provided in FIG. The method provided in Figure 6 is executed), if yes, the following S603a and S603b are executed; S603a. In response to detecting the TE signal, delay the time of detecting the TE signal by (1/4)*T _f -T ₁ , ( 1/2)*T _f -T ₁ , (3/4)*T _f -T ₁ and T _f -T ₁ , T _f represents the duration of a single refresh, and T ₁ represents the second specified duration; S603b. Control the ambient light The second designation of the sensor after delaying (1/4)*T _f -T ₁ , (1/2)*T _f -T ₁ , (3/4)*T _f -T ₁ and T _f -T _{1 respectively} Collect ambient light data within time length T ₁ ; S604. Acquire ambient light data and total collection time; S605. Cache ambient light data; S606. Determine whether the total collection time reaches the preset collection time. If the total collection time reaches the preset collection time, then End, if the total collection time does not reach the preset collection time, return to S601 to continue execution.

Based on the method provided in FIG. 10, the working sequence diagrams of the OLED display screen having the brightness of low brightness, medium brightness and high brightness respectively can be as shown in FIG. 11. In FIG. 11, when the brightness of the OLED display screen is low and medium brightness, the LED in the display area corresponding to the ambient light sensor is in the off state. Specifically, it can be the situation shown in FIG. 5 above. At this time, the ambient light sensor Collect four ambient light data of the second specified duration T ₁ within a single refresh duration T _f ; when the brightness of the OLED display is high, the LED in the display area corresponding to the ambient light sensor is in the off state. This is the situation shown in Figure 4 above. In addition, when the brightness of the OLED display screen is low brightness, medium brightness, and high brightness respectively, the second specified duration T _{1 is} all equal to the off duration of the LED in the display area corresponding to the ambient light sensor.

It should be noted that, in the above-mentioned Figures 7, 9 and 11, the brightness of the OLED display is the timing chart corresponding to the lower brightness, the medium brightness and the higher brightness. The low level can indicate that the OLED display For the LEDs in the off-state display area, the high level can indicate the LEDs in the on-state display area in the OLED display.

In the embodiment of the present application, the electronic device detects the display synchronization signal to determine the corresponding first time and second time when the LED of the display area corresponding to the ambient light sensor remains in the off state, so that only when the ambient light sensor corresponds The ambient light data is collected when the LED in the display area is kept off, thereby avoiding the influence of the OLED display itself on the collected ambient light data and improving the signal-to-noise ratio of the ambient light data; in addition, this method does not require high performance The ambient light sensor can reduce the amount of collected ambient light data and reduce the data processing requirements of electronic equipment.

The embodiment of the present application also provides an electronic device. The structure of the electronic device may be as shown in FIG. 1 above. The electronic device includes an OLED display screen 140 covering the ambient light sensor 151, such as the OLED display screen 140 and the ambient light sensor. The positional relationship of 151 can be as shown in Figure 2 above.

In the embodiment of the present application, the processor 180 in the electronic device may be configured to perform the following steps: detecting the display synchronization signal; in response to detecting the display synchronization signal, determining the first time and the second time, the first time being the ambient light sensor The turn-off time of the LED in the display area corresponding to 151, the second time is the turn-on time of the LED in the display area corresponding to the ambient light sensor 151, the first time is earlier than the second time, the The LED remains off between the first moment and the second moment; when the ambient light sensor 151 is turned on, the turning on time of the ambient light sensor 151 is not earlier than the first moment; turning off the ambient light sensor 151, the turning off time of the ambient light sensor 151 is not too late At the second moment.

Optionally, the processor 180 is specifically configured to determine the first moment according to the moment when the display synchronization signal is detected and the position of the ambient light sensor 151 on the OLED display screen 140. In addition, the processor 180 is also specifically configured to: determine the first time according to the third time and the position of the ambient light sensor 151 on the OLED display 140; wherein, the third time is the first time delay when the display synchronization signal is detected. At the time, the first duration is related to the single refresh duration of the OLED display screen 140 and the turn-off duration of the LED in the display area corresponding to the ambient light sensor 151. The first duration may be the difference between the single refresh duration of the OLED display screen 140 and the turn-off duration of the LED in the display area corresponding to the ambient light sensor 151.

In another embodiment of the present application, turning off the LED of the display area corresponding to the ambient light sensor 151 is used to refresh the next frame of image of the OLED display 140; and/or, the display area corresponding to the ambient light sensor 151 Turning off the LED is used to adjust the brightness of the OLED display 140.

Optionally, the time between the on time and the off time is the off time of the LED in the display area corresponding to the ambient light sensor 151 when the next frame of the OLED display 140 is refreshed; or, the time between the on time and the off time The duration is the duration during which the LED in the display area corresponding to the ambient light sensor 151 is turned off when the brightness of the OLED display 140 is adjusted.

Further, the processor 180 is further specifically configured to: turn on and turn off the ambient light sensor 151 multiple times, so that the total duration of the ambient light sensor 151 in the on state meets the preset collection duration.

It should be noted that the description of each function corresponding to the processor 180, the OLED display 140, and the ambient light sensor in the electronic device may refer to the description of the relevant content of the steps involved in the above method embodiments. The embodiments of the present application will not be described here. Repeat it again.

Finally, it should be noted that the above are only specific implementations of this application, but the scope of protection of this application is not limited to this. Any changes or substitutions within the technical scope disclosed in this application should be covered by this application. Within the scope of protection applied for. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

An ambient light data collection method, characterized in that it is applied to an electronic device including an OLED display screen and an ambient light sensor, the OLED display screen is overlaid on the ambient light sensor, and the method includes:

Detection and display synchronization signal;

In response to detecting the display synchronization signal, a first time and a second time are determined, the first time being the off time of the LED of the display area corresponding to the ambient light sensor, and the second time being the environment The turn-on time of the LED of the display area corresponding to the light sensor, the first time is earlier than the second time, and the LED of the display area corresponding to the ambient light sensor is at the first time and the second time Keep it closed between;

Turning on the ambient light sensor, and the moment of turning on the ambient light sensor is not earlier than the first moment;

The ambient light sensor is turned off, and the moment when the ambient light sensor is turned off is no later than the second moment.
The method according to claim 1, wherein determining the second moment comprises:

The second moment is determined according to the moment when the display synchronization signal is detected and the position of the ambient light sensor on the OLED display screen.
The method according to claim 1 or 2, wherein determining the second moment includes:

Determine the second moment according to the third moment and the position of the ambient light sensor on the OLED display screen;

Wherein, the third moment is a moment when the time when the display synchronization signal is detected is delayed by a first period of time, and the first period of time corresponds to the single refresh period of the OLED display screen and the display screen corresponding to the ambient light sensor The off time of the LED in the area is related.
The method according to claim 3, wherein the first duration is the difference between the single refresh duration of the OLED display screen and the turn-off duration of the LEDs in the display area corresponding to the ambient light sensor .
The method according to any one of claims 1 to 4, wherein between the first moment and the second moment, the image of the OLED display screen is refreshed.
The method according to any one of claims 1 to 4, wherein the brightness of the OLED display screen is adjusted between the first moment and the second moment.
The method according to any one of claims 1-6, wherein the method further comprises:

The ambient light sensor is turned on multiple times, so that the total time period during which the ambient light sensor is in the on state is greater than the preset time period.
An electronic device, characterized in that the electronic device includes a processor, an OLED display screen and an ambient light sensor, the OLED display screen covers the ambient light sensor, and the processor is configured to perform the following steps:

Detect and display synchronization signal;

In response to detecting the display synchronization signal, a first time and a second time are determined, the first time being the turn-on time of the LED of the display area corresponding to the ambient light sensor, and the second time being the environment When the LED in the display area corresponding to the light sensor is turned off, the first time is earlier than the second time, and the LED in the display area corresponding to the ambient light sensor is at the first time and the second time Keep it closed between;

Turning on the ambient light sensor, and the turning-on time of the ambient light sensor is not earlier than the first time;

The ambient light sensor is turned off, and the turning off time of the ambient light sensor is no later than the second time.
The electronic device according to claim 8, wherein the processor is specifically configured to:

The second moment is determined according to the moment when the display synchronization signal is detected and the position of the ambient light sensor on the OLED display screen.
The electronic device according to claim 8 or 9, wherein the processor is further specifically configured to:

Determine the second moment according to the third moment and the position of the ambient light sensor on the OLED display screen;

Wherein, the third moment is a moment when the time when the display synchronization signal is detected is delayed by a first period of time, and the first period of time corresponds to the single refresh period of the OLED display screen and the display screen corresponding to the ambient light sensor The off time of the LED in the area is related.
The electronic device of claim 10, wherein the first duration is the difference between the single refresh duration of the OLED display screen and the turn-off duration of the LED in the display area corresponding to the ambient light sensor value.
The electronic device according to any one of claims 8-11, wherein turning off the LED of the display area corresponding to the ambient light sensor is used to refresh the next frame of image of the OLED display;

And/or, turning off the LED of the display area corresponding to the ambient light sensor is used to adjust the brightness of the OLED display.
The electronic device according to any one of claims 8-12, wherein the length of time between the opening moment and the closing moment is when the next frame of image of the OLED display screen is refreshed, the ambient light sensor The off duration of the LED in the corresponding display area.
The electronic device according to any one of claims 8-12, wherein the length of time between the opening moment and the closing moment is the display corresponding to the ambient light sensor when the brightness of the OLED display is adjusted. The length of time the LED in the screen area is off.
The electronic device according to any one of claims 8-14, wherein the processor is further specifically configured to:

Turning on and turning off the ambient light sensor multiple times, so that the total time that the ambient light sensor is in the on state meets the preset collection duration.