CN110012162A - A kind of ambient light data acquisition method and electronic equipment - Google Patents

Abstract

The present application provides an ambient light data collection method and electronic device, which relate to the technical field of electronic devices and are used to reduce the amount of collected ambient light data. The method is applied to an electronic device with an OLED display screen covering an ambient light sensor, and includes: detecting a display synchronization signal; in response to detecting the display synchronization signal, determining a first moment and a second moment, where the first moment corresponds to the ambient light sensor The turn-on moment of the LED in the display area of the ambient light sensor, the second moment is the turn-off moment of the LED in the display area of Keep the closed state between the time and the second time; turn on the ambient light sensor, and the opening time of the ambient light sensor is not earlier than the first time; turn off the ambient light sensor, and the closing time of the ambient light sensor is not later than the second time.

Description

A kind of ambient light data acquisition method and electronic device

technical field

The present application relates to the technical field of electronic devices, and in particular, to an ambient light data collection method and electronic device.

Background technique

In some electronic devices using organic light-emitting diode (OLED) display screens, such as mobile phones, tablet computers, cameras and video cameras, 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 OLED displays in electronic devices.

During ambient illumination detection, since the OLED display itself will emit light, in order to avoid the influence of the brightness of the OLED display on the detection result, the detection is usually performed by the following method. Specifically, a light sensor with high sensitivity and high sampling rate is used to collect ambient illuminance for a period of time at a high sampling rate, and by finding the minimum value among the detected multiple ambient illuminances, an unaffected OLED display can be obtained. Brightness interferes with ambient light levels.

However, the above solution has high requirements on the performance of the light sensor, and the amount of ambient illuminance data collected at a high sampling rate is large, so the data processing capability of the electronic device is required to be high.

SUMMARY OF THE INVENTION

The present application provides an ambient light data collection method and electronic device, which are used to reduce the amount of collected ambient light data.

To achieve the above object, the application adopts the following technical solutions:

In a 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. 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 The ON time of the LED in the corresponding display area, the second time is the OFF time of the LED in the display area corresponding to the ambient light sensor, 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. Keep the closed 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 opening time of the ambient light sensor is not earlier than the first moment; turn off the ambient light sensor, so that the ambient light The sensor finishes collecting ambient light data, and the closing time of the ambient light sensor is not later than the second time.

In the above technical solution, by detecting the display synchronization signal, the first time and the second time corresponding to when the LEDs in the display area corresponding to the ambient light sensor are kept off are determined, so that only the LEDs in the display area corresponding to the ambient light sensor are displayed. The ambient light data is collected while the closed state is maintained, 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, In addition, the data volume of the collected ambient light data can be reduced, and the data processing capability requirement of the electronic device can be lowered.

In a possible implementation manner 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 above possible implementation manner, 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 method for determining the first moment is provided.

In a possible implementation manner 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 when a display synchronization signal is detected 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 turn-off time of the LEDs 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. In the above possible implementation manner, since the second moment is related to the third moment and the position of the ambient light sensor on the OLED display screen, another simple and effective method for determining the first moment is provided.

In a possible implementation manner of the first aspect, the first duration is the difference between the single refresh duration of the OLED display screen and the off duration of the LEDs in the display screen area corresponding to the ambient light sensor. The above possible implementation manners provide a simple and effective manner for determining the first duration.

In a possible implementation manner of the first aspect, turning off the LEDs in the display area corresponding to the ambient light sensor is used to refresh the next frame of the OLED display; and/or, the ambient light sensor corresponding to the display area The LEDs are turned off to adjust the brightness of the OLED display. In the above possible implementation manner, the electronic device can use the LEDs in the display area that are turned off when refreshing the next frame of the OLED display, and/or the LEDs in the display area that are turned off when adjusting the brightness of the OLED display to collect the environment. Therefore, the flexibility and diversity of collecting ambient light data can be improved, and the stability of the collected ambient light data can also be improved.

In a possible implementation manner of the first aspect, the duration between the ON time and the OFF time is the OFF time of the LEDs in the display area corresponding to the ambient light sensor when refreshing the next frame of the OLED display. In the above possible implementation manner, the electronic device can control the ambient light sensor to collect ambient light data using the duration of the LEDs in the display screen area that is turned off during the refresh process during the frame image refresh process of the OLED display screen, thereby avoiding the OLED display screen 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 time period between the turn-on time and the turn-off time is the time length that the LEDs in the display area corresponding to the ambient light sensor are turned off when the brightness of the OLED display screen is adjusted. In the above possible implementation manner, the electronic device can control the ambient light sensor to collect ambient light data using the duration of the LEDs in the display area that is turned off during brightness adjustment during the brightness adjustment process 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 manner of the first aspect, the method further includes: turning the ambient light sensor on and off multiple times, so that the total duration of the ambient light sensor being in the ON state meets the preset collection duration. In the above possible implementation manner, 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 is covered above the ambient light sensor, and the processor is configured to perform the following steps: detecting a display synchronization signal; responding to After 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 screen area corresponding to the ambient light sensor, and the second time is the turn-off time of the LED in the display screen area corresponding to the ambient light sensor. Time, the first time is earlier than the second time, the LED in the display area corresponding to the ambient light sensor remains off between the first time and the second time; the ambient light sensor is turned on, and the ambient light sensor is turned on not earlier than the first time. One moment; turn off the ambient light sensor, and the closing moment of the ambient light sensor is not 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 manner of the second aspect, the processor is 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 when display synchronization is detected The timing of the signal is delayed by the first duration, which is related to the single refresh duration of the OLED display and the off duration of the LEDs in the display area corresponding to the ambient light sensor.

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

In a possible implementation manner of the second aspect, turning off the LEDs in the display area corresponding to the ambient light sensor is used to refresh the next frame of the OLED display; and/or, the ambient light sensor corresponding to the display area The LEDs are turned off to adjust the brightness of the OLED display.

In a possible implementation manner of the second aspect, the duration between the ON time and the OFF time is the OFF duration of the LEDs in the display area corresponding to the ambient light sensor when refreshing the next frame of image of the OLED display.

In a possible implementation manner of the second aspect, the duration between the ON time and the OFF time is the OFF time of the LEDs in the display area corresponding to the ambient light sensor when adjusting the brightness of the OLED display.

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

It can be understood that any electronic device provided above is used to execute the corresponding method provided above. Therefore, the beneficial effect that can be achieved can refer to the beneficial effect of the corresponding method provided above. It is not repeated here.

Description of drawings

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

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

3 is a schematic flowchart of a first method for collecting ambient light data according to an embodiment of the present application;

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

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

6 is a schematic flowchart of a second method for collecting ambient light data according to an embodiment of the present application;

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

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

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

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

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

Detailed ways

In this application, "at least one" means one or more, and "plurality" means two or more. "And/or", which describes the association relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, which can indicate: the existence of A alone, the existence of A and B at the same time, and the existence of B alone, where A, B can be singular or plural. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b or c may represent: a, b, c, a-b, a-c, b-c or a-b-c, where a, b and c may be single or multiple. The character "/" generally indicates that the associated objects are an "or" relationship. In addition, in the embodiments of the present application, words such as "first" and "second" do not limit the quantity and execution order.

It should be noted that, in this application, words such as "exemplary" or "for example" are used to represent examples, illustrations or illustrations. Any embodiment or design described in this application as "exemplary" or "such as" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present the related concepts in a specific manner.

FIG. 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. The examples are collectively referred to as electronic equipment. The structure of the electronic device is described below by taking the electronic device being a mobile phone as an example.

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 assembly 150, an audio circuit 160, an input/output (I/O) ) subsystem 170, processor 180, and power supply 190 and other components. 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 the sensor assembly 150 .

Among them, the RF circuit 110 can be used for receiving and sending 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 with access network devices through a WiFi network.

The memory 120 can be used to store software programs and modules, and 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 storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data (such as audio) created according to the use of the mobile phone. data, image data, phone book, etc.). Additionally, memory 120 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

Other input devices 130 may be used to receive input numerical or character information, and to generate key signal input related to user settings and function control of the mobile phone. The other input devices 130 may include, but are not limited to, one or more of physical keyboards, function keys (such as volume control keys, power switch keys, etc.), trackballs, mice, joysticks, and the like.

The OLED display 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 140 can include a display panel 141 and a touch panel 142 . In this embodiment of the present application, the display panel 141 in the OLED display screen 104 may be configured in the form of OLED. For example, the display panel 141 may include an OLED array, and the OLED array includes multiple rows and multiple columns of OLEDs.

Sensor assembly 150 includes one or more sensors for providing status assessments of various aspects of the handset. In this embodiment of the present application, the sensor assembly 150 may include an ambient light sensor, which is used to collect data such as ambient light intensity, so as to adjust the automatic backlight brightness of the OLED display screen 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, and the sensor component 150 can detect the temperature change of the mobile phone, the acceleration/deceleration of the mobile phone, the orientation, the opening/closing of the mobile phone state, or relative positioning of components, etc. In addition, the sensor assembly 150 may also include a CMOS or CCD image sensor or the like 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, and the speaker converts it 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. Converted to audio data, the audio data is output to the RF circuit 110 for transmission to, for example, another cell phone, or to the memory 120 for further processing.

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

The processor 180 is the control center of the mobile phone, using various interfaces and lines to connect various parts of the entire mobile phone, by running or executing the software programs and/or modules stored in the memory 120, and calling the data stored in the memory 120, Execute 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 (Application Processor, AP) and a modem processor (modem), wherein the application processor mainly processes the operating system , user interface and application programs, etc., the modem processor mainly deals with wireless communication. It can be understood that, the above-mentioned modulation and demodulation processor may not be integrated into the processor 180 .

A power source 190, such as a battery, is used to power the various components described above. The power supply may be logically connected to the processor 180 through a power management system, so that functions such as managing charging, discharging, and power consumption are implemented through the power management system.

In this 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 . The ambient light sensor 151 may be covered by the top of the OLED display 140, or by the middle 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. The top cover of 140 is taken as an example for illustration. In addition, the mobile phone may be a full-screen mobile phone, or may not be a full-screen mobile phone, which is not specifically limited in this 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 the one shown, or combine some components, or arrange different components.

FIG. 3 is a schematic flowchart of a first method for collecting ambient light data according to an embodiment of the present application. The method can be applied to the electronic device described above, and the OLED display screen in the electronic device is covered above the ambient light sensor. , the method can be specifically executed by the processor in the electronic device, see 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 one frame (frame) when displaying display contents such as images and videos, and the refreshed display of each frame can be refreshed line by line in the order from top to bottom. , so that the display content of one frame needs to be refreshed multiple times. During the refresh process of one frame, the LED of the display area refreshed each time is turned from on to off, that is, the corresponding area turns black, and then the refreshed content is displayed in the display area. When the OLED display screen completes the refresh of a whole frame of display content, a display synchronization signal is output, and the display synchronization signal can be used to indicate that the refresh of the display content of the frame is completed.

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

S302: In response to detecting the display synchronization signal, determine a first moment and a second moment, where the first moment is the turn-on moment of the LED in the display screen area corresponding to the ambient light sensor, and the second moment is the display screen 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 screen area corresponding to the ambient light sensor remains off between the first time and the second time.

The LEDs in the display area corresponding to the ambient light sensor may specifically refer to the LEDs in the display area covering the area above the ambient light sensor in the OLED display. The state of the LEDs in the display area is related to the accuracy of the ambient light data collected by the ambient light sensor. Specifically, when the LEDs in the display area corresponding to the ambient light sensor are in an on state (also called a lighting state), the ambient light data collected by the ambient light sensor will be affected by the LEDs in the display area being in an on state. Influence, that is, the collected ambient light data will include both ambient light data and 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 ambient light data. Therefore, in order to ensure that the ambient light data collected by the subsequent ambient light sensor will not be affected, the electronic device can determine the time period when the LEDs in the display area corresponding to the ambient light sensor are in the off state, that is, determine the first moment and the second 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 refresh process of the display content and the brightness adjustment process of the OLED display. Introduce the situation.

The first is the refresh process of the displayed content.

Among them, as mentioned in S301 above, during the refresh process of one frame, the area of the display screen that is refreshed each time will turn black first, and then the refreshed content will be displayed in the area of the refreshed display screen. Turning to black first is achieved by turning off the LEDs in the refreshed display area, that is, the LEDs in the refreshed display area are turned off at this time, which is subsequently referred to as the refreshed display area. When the display screen area that is refreshed and turned off moves to the display screen area corresponding to the ambient light sensor (that is, the LEDs in the display screen area corresponding to the ambient light sensor are turned off to refresh the next frame of the OLED display screen, as shown in Figure 4 ) display), determine the first time and the second time, and the interval between the first time and the second time is the time period during which it is determined that the LED of the refreshed and closed display screen area is in the off state.

In addition, during the refresh process of the display content of the same frame, the display synchronization signal is the signal output by the OLED display screen when the refresh of the display content of the whole frame is completed, and the closing time of the LED in the display screen area where the refresh is turned off is also completed. The refresh time of the display content of the whole frame, that is, for the same frame, the display synchronization signal corresponding to the frame is synchronized with the turn-off time of the LEDs in the display screen area where the refresh is turned off. Therefore, based on this synchronization relationship, it is possible to determine the turn-off moment of the LED of the refresh-off display screen area.

In a possible implementation manner, when the LEDs in the display screen area that are refreshed and turned off are LEDs in 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 The position of the ambient light sensor on the OLED display screen determines the second moment. Specifically, the electronic device can determine the second time 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 when the first frame is refreshed is detected, and the second time may be the time when the LED in the refreshed display area is turned off during the refresh of the second frame. At the time of closing, the second frame is the next frame adjacent to the first frame.

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

Exemplarily, assuming that the first movement duration is T _S1 and the single refresh duration is T _f , the electronic device can delay the moment when the display synchronization signal is detected by the single refresh duration T _f , if the first movement duration T _S1 If it is zero, the second moment can be obtained directly. If the first movement duration T _S1 is not zero, the second moment can be obtained by delaying the moment after the delay of the single refresh duration T _f by T _S1 . Further, after the second moment is determined, the first moment can be determined according to the off-time of the LEDs in the refreshed-off display area, and the off-time T _b1 of the LEDs in the refreshed off-display area is controlled by the electronic device, that is, The off-time T _b1 is known, and the electronic device can determine the first time by advancing the second time by the off-time T _b1 .

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

Among them, the brightness adjustment of the OLED display can include two working modes, namely, a pulse-width modulation (PWM) mode and a non-PWM mode. In the PWM mode, a duty cycle adjustment signal is required (for example, the duty cycle The adjustment signal can be a square wave signal with a frequency of 240Hz), and the duty cycle adjustment signal is not required in the non-PWM mode. The PWM mode can mean that when the brightness of the OLED display is low, the lighting duration of the LEDs in the OLED display is controlled by PWM, so as to realize the brightness adjustment of the OLED display. In this working mode, there will be LEDs in the display area. In the off state for a period of time, the LED in the display area is subsequently referred to as the LED in the display area where the brightness adjustment is turned off. The non-PWM mode can mean that when the brightness of the OLED display is high, the brightness adjustment of the OLED display cannot be achieved through the PWM mode, and the brightness adjustment of the OLED display can only be achieved by increasing the power supply current and other methods. The LEDs in the display area are turned off for a period of time, that is, there are no LEDs in the display area where the brightness adjustment is turned off. Therefore, when the display area where the brightness adjustment is turned off moves to the display area corresponding to the ambient light sensor (that is, the LEDs in the display area corresponding to the ambient light sensor are turned off to adjust the brightness of the OLED display), the first moment is determined. and the second moment, that is, the time period during which the LEDs in the display area where the brightness adjustment is turned off are determined to be in the off state.

It should be noted that during the brightness adjustment process of the same frame, in the above PWM mode, there will be one or more display screen areas with brightness adjustment turned off evenly distributed, and one or more display screen areas with brightness adjustment turned off will be in different to move to the display area corresponding to the ambient light sensor. The number N of display screen areas that are turned off by the brightness adjustment is related to the frequency of the duty cycle adjustment signal and the refresh frequency of the OLED display screen, and the value of N can be equal to the ratio of the two. If the frequency of the duty cycle adjustment signal is 240Hz, the number of display screen areas to be turned off by the brightness adjustment can be 4 (N=240/60=4). Among the closed area, the second closed area, the third closed area, and the fourth closed area, the three closed areas are only used for brightness adjustment, and the other closed area is used for both refreshing the display content and brightness adjustment.

In addition, in the process of refreshing the display content of the same frame and adjusting the brightness, the display synchronization signal is the signal output by the OLED display screen when the refresh of the display content of the whole frame is completed. The closing time is also the time when the refresh 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 LEDs in the display area where the brightness is turned off are synchronized. Therefore, based on this synchronization relationship, it is possible to determine the turn-off moment of the LED of the display screen area where the brightness adjustment is turned off.

In a possible implementation manner, when the LEDs in the display area where the brightness adjustment is turned off are the LEDs in the display 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 to determine the second moment. Specifically, the electronic device can determine the second time 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 when the first frame is refreshed is detected, and the second time may refer to the area of the display screen where the brightness adjustment is turned off during the brightness adjustment process of the second frame The moment 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 duration of the OLED display is known. The position of the ambient light sensor on the OLED display screen can be specifically used to determine the time required for the display area where the brightness adjustment is turned off to move from the top of the OLED display screen to the display area corresponding to the ambient light sensor, hereinafter referred to as the second movement duration.

Exemplarily, assuming that the second movement duration is T _S2 and the single refresh duration is T _f , then the electronic device can delay the moment when the display synchronization signal is detected by the single refresh duration T _f (i.e., i/N) respectively. T _f *i/N, the value of i can be respectively 1 to N). If the second movement duration T _S2 is zero, a plurality of second moments can be directly obtained. If the second movement duration T _S2 is not zero, Then, the moments after the delay T _f *i/N can be respectively delayed by T _S2 to obtain a plurality of second moments. Further, after a plurality of second moments are determined, a plurality of corresponding first moments may be determined according to the turn-off duration T _b2 of the LEDs in the display area where the brightness is turned off, and the LEDs in the display area where the brightness is turned off are turned off. The duration T _b2 is determined by the brightness of the OLED display screen, and the brightness of the OLED display screen is controlled by the electronic device, that is, the electronic device can directly determine the off duration T _b2 by the brightness, and the electronic device advances the multiple first moments by the A plurality of corresponding first moments can be determined by the closing time length T _b2 .

Exemplarily, the refresh frequency of 4 is 60 Hz, the frequency of the duty cycle adjustment signal is 240 Hz, and the 4 display screen areas that are turned off by brightness adjustment are the first closed area, the second closed area, and the third closed area in FIG. 5 . Taking the closing area and the fourth closing area as an example, the second moving duration T4 is zero, then when the first closing area, the second closing area, the third closing area and the fourth closing area move to the display area corresponding to the ambient light sensor respectively The first times are (1/4)*T _f , (1/2)*T _f , (3/4)*T _f and T _f respectively, and the corresponding first times 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 off the ambient light sensor, the turn-on time of the ambient light sensor is not earlier than the first time, and the turn-off time of the ambient light sensor is not later than the second time.

After the first moment and the second moment are determined, the electronic device may turn on the ambient light sensor according to the first moment, and turn off the ambient light sensor according to the second moment after the ambient light sensor collects ambient light data for a period of time. For example, the processor of the electronic device sends a turn-on signal to the ambient light sensor at a time not earlier than the first time, so that the ambient light sensor starts to collect ambient light data when receiving the turn-on signal, and not later than the first time. An end signal is sent to the ambient light sensor at a certain moment in 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 may further cache 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 duration between the first moment and the second moment, and the specified duration is the duration from the on-time to the off-time of the ambient light sensor (that is, the ambient light sensor collects the ambient light) The duration of the optical data), the specified duration may be less than the duration from the first moment to the second moment, or may be equal to the duration from the first moment to the second moment. 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, and the specified duration is equal to the duration from the first moment to the second moment; The ambient light sensor is turned on at a certain moment after a moment, and the ambient light sensor is turned off at a second moment or at a certain moment before the second moment, at this time, the specified duration is less than the duration from the first moment to the second moment; or, the 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, and 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 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 an off duration of the LEDs in the display area corresponding to the ambient light sensor when the next frame of the OLED display is refreshed. That is, in the first case of S302 above, the LEDs in the display screen area that are refreshed and turned off are the LEDs in the display screen area corresponding to the ambient light sensor, and at this time, the LEDs in the display screen area corresponding to the ambient light sensor are turned off. It is the turn-off duration of the LEDs in the display screen area that is turned off by the refresh, so the specified time duration can specifically be the turn-off duration of the LEDs in the display screen area that is turned off by the refresh. The length of time that the LEDs in the display area are turned off.

Or, the specified time period is the off time period 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 above, the LEDs in the display area where the brightness adjustment is turned off are the LEDs in the display area corresponding to the ambient light sensor, and at this time, the LEDs in the display area corresponding to the ambient light sensor are 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 can specifically be the off duration of the LEDs in the display area where the brightness is turned off. For example, the specified duration can be as shown in Figure 5 above. The length of time that each of the four off-zone LEDs is off.

Further, the electronic device can also turn on and off the ambient light sensor multiple times, so that the total duration of the ambient light sensor in the ON state (that is, the total acquisition duration) meets the preset acquisition duration, that is, the ambient light sensor is controlled to collect ambient light data. The total duration is the preset collection duration, the preset collection duration may include multiple specified durations within the single refresh duration of one frame or multiple frames, and each frame may correspond to one or more specified durations. By turning the ambient light sensor on and off multiple times, when the total collection time of the ambient light sensor meets the preset collection time, the signal-to-noise ratio of the ambient light data collected by the ambient light sensor can be improved, thereby improving the ambient light data collected by the ambient light sensor. The stability of the ambient light sensor is low, and the performance requirements such as the sensitivity and sampling rate of the ambient light sensor are relatively low.

For ease of understanding, the display synchronization signal is taken as the TE signal below, the ambient light sensor is located at the top of the OLED display screen (that is, the above-mentioned first movement duration T _S1 and second movement duration T _S2 are zero), and the refresh frequency of the OLED display screen The method provided in the embodiment of the present application is illustrated by taking the example that the brightness of the OLED display screen is lower brightness, medium brightness and higher brightness respectively when the frequency is 60Hz, the duty cycle adjustment signal may be 240Hz. Low brightness and medium brightness are two examples of brightness for the OLED display screen working in the PWM mode, and high brightness is an example of the brightness for the OLED display screen working in the 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 moment when the TE signal is detected by T _f -T ₀ , where T _f represents a single time Refresh duration, T ₀ represents the first specified duration; S403. Turn on the ambient light sensor, and after the first specified duration T ₀ , turn off the ambient light sensor, that is, control the ambient light sensor to collect ambient light data within the first specified duration T ₀ ; S404. Acquire ambient light data and the total collection time; S405. Cache the 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, end, if the total collection time does not reach Returning to S401 to continue the execution when the preset collection duration is set.

Based on the method provided in FIG. 6 , the working timing diagram of the OLED display screen with the brightness of lower brightness, medium brightness and higher brightness, respectively, may be as shown in FIG. 7 . In FIG. 7 , the LED in the display area corresponding to the ambient light sensor is in an off state, which may be the situation shown in the above-mentioned FIG. 4 . At this time, the ambient light sensor only collects a first specified duration T within the single refresh duration T _{f 0} ambient light data, the first specified duration T ₀ may be configured as a fixed value. Wherein, when the brightness of the OLED display screen is low brightness and medium brightness, the first specified duration T ₀ is less than the turn-off duration of the LEDs in the display screen area corresponding to the ambient light sensor; when the brightness of the OLED display screen is relatively high brightness , the specified duration is equal to the off duration of the LEDs in the display area corresponding to the ambient light sensor.

Alternatively, as shown in FIG. 8 , the method may include: S501. Detecting the TE signal; S502. judging whether the OLED display screen is working in the PWM mode, if not, execute according to S402-S403 provided in FIG. The method provided in FIG. 6 is performed), if so, perform the following S503a and S503b; S503a. In response to detecting the TE signal, delay the moment when the TE signal is detected 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 , Collect ambient light data within the first specified time period T ₀ after (1/2)*T _f -T ₀ , (3/4)*T _f -T ₀ and T _f -T ₀ ; 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, end, if the total collection time does not reach the preset collection time, return to S501 to continue implement.

Based on the method provided in FIG. 8 , the working timing diagram of the OLED display screen under the conditions of lower brightness, medium brightness, and higher brightness, respectively, may be shown in FIG. 9 . In FIG. 9 , when the brightness of the OLED display screen is low brightness and medium brightness, the LED in the display screen area corresponding to the ambient light sensor is in an off state. Specifically, it can refer to the situation shown in FIG. 5 above. The light sensor collects ambient light data within four first specified durations T ₀ within a single refresh duration T _f ; when the brightness of the OLED display screen is relatively high, the LEDs in the display area corresponding to the ambient light sensor are turned off The state may specifically be the situation shown in the above-mentioned FIG. 4 . 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 turn-off duration of the LEDs in the display screen area corresponding to the ambient light sensor; when the brightness of the OLED display screen is relatively high brightness , the first specified duration T ₀ specified duration is equal to the off duration of the LEDs in the display area corresponding to the ambient light sensor.

Alternatively, as shown in FIG. 10 , the method may include: S601. Detecting the TE signal; S602. judging whether the OLED display screen works in the PWM mode, if not, execute according to S402-S403 provided in FIG. The method provided in FIG. 6 is performed), if so, perform the following S603a and S603b; S603a. In response to detecting the TE signal, delay the moment when the TE signal is detected 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 single refresh duration, and T ₁ represents the second specified duration; S603b. Control the ambient light Second assignment of sensors after delays of ( _1/4 )* _Tf -T1, ( _1/2 )* _{Tf -} T1, (3/4)* _{Tf -} T1, and _Tf -T1, respectively Collect ambient light data within the time duration T1 _; S604. Acquire ambient light data and the total collection time; S605. Cache the ambient light data; S606. Determine whether the total collection time reaches the preset collection time, and 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 the execution.

Based on the method provided in FIG. 10 , the working timing diagram of the OLED display screen with the brightness of lower brightness, medium brightness and higher brightness, respectively, may be as shown in FIG. 11 . In FIG. 11 , when the brightness of the OLED display screen is low brightness and medium brightness, the LED in the display screen area corresponding to the ambient light sensor is in an off state. Specifically, the situation shown in FIG. 5 can be described above. Four ambient light data of the second specified duration T ₁ are collected within a single refresh duration T _f ; when the brightness of the OLED display screen is relatively high, the LED in the display area corresponding to the ambient light sensor is in an off state. For the situation shown in Figure 4 above. In addition, when the brightness of the OLED display screen is respectively low brightness, medium brightness and high brightness, the second specified duration T ₁ is equal to the off duration of the LEDs 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 screen is the timing diagram corresponding to low brightness, medium brightness and high brightness, and a low level can indicate that the OLED display screen is in the The LED of the display area in the off state, and the high level can indicate the LED of the display area in the on state of the OLED display screen.

In the embodiment of the present application, the electronic device detects the display synchronization signal to determine the first time and the second time corresponding to when the LED in the display screen area corresponding to the ambient light sensor is kept in an off state, so that only when the ambient light sensor corresponds to the corresponding first time and the second time The ambient light data is collected when the LEDs in the display area are kept off, thus 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 capability requirements of electronic equipment.

An embodiment of the present application further provides an electronic device, the structure of which may be as shown in FIG. 1 above, and 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 may be as shown in FIG. 2 above.

In this embodiment of the present application, the processor 180 in the electronic device may be configured to perform the following steps: detecting a display synchronization signal; in response to detecting the display synchronization signal, determining a first moment and a second moment, where the first moment is an ambient light sensor The time when the LEDs in the display area corresponding to 151 are turned off, and the second time is the time when the LEDs in the display area corresponding to the ambient light sensor 151 are turned on. The LED is kept off between the first time and the second time; the ambient light sensor 151 is turned on, and the opening time of the ambient light sensor 151 is not earlier than the first time; the ambient light sensor 151 is turned off, and the closing 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 screen 140; wherein, the third time is the time when the display synchronization signal is detected and delayed by the first time. At the moment, the first duration is related to the single refresh duration of the OLED display screen 140 and the OFF duration of the LEDs in the display screen 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 off duration of the LEDs in the display area corresponding to the ambient light sensor 151 .

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

Optionally, the time length between the turn-on time and the turn-off time is the turn-off time of the LEDs in the display area corresponding to the ambient light sensor 151 when the next frame of the OLED display screen 140 is refreshed; or, the time between the turn-on time and the turn-off time. The duration is the duration that the LEDs in the display area corresponding to the ambient light sensor 151 are turned off when the brightness of the OLED display 140 is adjusted.

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

It should be noted that, for the description of the functions corresponding to the processor 180, the OLED display screen 140, and the ambient light sensor in the electronic device, reference may be made to the description of the relevant content of the steps involved in the foregoing method embodiments, which are not described in the embodiments of the present application. Repeat.

In the embodiment of the present application, the electronic device detects the display synchronization signal to determine the first time and the second time corresponding to when the LED in the display screen area corresponding to the ambient light sensor is kept in an off state, so that only when the ambient light sensor corresponds to the corresponding first time and the second time The ambient light data is collected when the LEDs in the display area are kept off, thus 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 capability requirements of electronic equipment.

Finally, it should be noted that: the above are only the specific embodiments of the present application, but the protection scope of the present application is not limited to this, and any changes or replacements within the technical scope disclosed in the present application should be included in the present application. within the scope of protection of the application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims (15)

1. a kind of ambient light data acquisition method, which is characterized in that applied to including OLED display screen and ambient light sensor In electronic equipment, the OLED display screen is covered on above the ambient light sensor, which comprises

Detect display synchronization signal；

In response to detecting the display synchronization signal, determine that the first moment and the second moment, first moment are the ring The close moment of the LED of the corresponding display screen area of border optical sensor, second moment are corresponding for the ambient light sensor Display screen area LED start-up time, first moment, the ambient light sensor was corresponding earlier than second moment The LED of display screen area remained off between first moment and second moment；

Open the ambient light sensor, unlatching ambient light sensor at the time of is no earlier than first moment；

Close the ambient light sensor, closing ambient light sensor at the time of is not later than second moment.

2. the method according to claim 1, wherein determining second moment, comprising:

According at the time of detecting the display synchronization signal and the ambient light sensor is in the position of the OLED display screen, Determine second moment.

3. method according to claim 1 or 2, which is characterized in that determine second moment, comprising:

According to third moment and the ambient light sensor in the position of the OLED display screen, second moment is determined；

Wherein, the third moment is described the at the time of postponing the first duration at the time of detect the display synchronization signal The LED's of one duration display screen area corresponding with the single refresh duration of the OLED display screen and the ambient light sensor It is related to close duration.

4. according to the method described in claim 3, it is characterized in that, the single brush of a length of OLED display screen of described first when Difference between the closing duration of the LED of new duration display screen area corresponding with the ambient light sensor.

5. method according to claim 1-4, which is characterized in that at first moment and second moment Between, refresh the image of the OLED display screen.

6. method according to claim 1-4, which is characterized in that at first moment and second moment Between, adjust the brightness of the OLED display screen.

7. method according to claim 1-6, which is characterized in that the method also includes:

Repeatedly open the ambient light sensor so that ambient light sensor total duration in the open state be greater than it is default Duration.

8. a kind of electronic equipment, which is characterized in that the electronic equipment includes: processor, OLED display screen and ambient light sensor, The OLED display screen is covered on above the ambient light sensor, and the processor is for executing following steps:

Detect display synchronization signal；

In response to detecting the display synchronization signal, determine that the first moment and the second moment, first moment are the ring The start-up time of the LED of the corresponding display screen area of border optical sensor, second moment are corresponding for the ambient light sensor Display screen area LED close moment, first moment, the ambient light sensor was corresponding earlier than second moment The LED of display screen area remained off between first moment and second moment；

The ambient light sensor is opened, the start-up time of the ambient light sensor is no earlier than first moment；

The ambient light sensor is closed, the close moment of the ambient light sensor is not later than second moment.

9. electronic equipment according to claim 8, which is characterized in that the processor is specifically used for:

According at the time of detecting the display synchronization signal and the ambient light sensor is in the position of the OLED display screen, Determine second moment.

10. electronic equipment according to claim 8 or claim 9, which is characterized in that the processor, also particularly useful for:

According to third moment and the ambient light sensor in the position of the OLED display screen, second moment is determined；

Wherein, the third moment is described the at the time of postponing the first duration at the time of detect the display synchronization signal The LED's of one duration display screen area corresponding with the single refresh duration of the OLED display screen and the ambient light sensor It is related to close duration.

11. electronic equipment according to claim 10, which is characterized in that a length of OLED display screen when described first Difference between the closing duration of the LED of single refresh duration display screen area corresponding with the ambient light sensor.

12. according to the described in any item electronic equipments of claim 8-11, which is characterized in that the ambient light sensor is corresponding The closing of the LED of display screen area is for refreshing the next frame image of the OLED display screen；

And/or the closing of the LED of the corresponding display screen area of the ambient light sensor is for adjusting the OLED display screen Brightness.

13. according to the described in any item electronic equipments of claim 8-12, which is characterized in that the start-up time and the closing Between moment when a length of next frame image for refreshing the OLED display screen when the corresponding display screen of the ambient light sensor The closing duration of the LED in region.

14. according to the described in any item electronic equipments of claim 8-12, which is characterized in that the start-up time and the closing Between moment when a length of brightness for adjusting the OLED display screen when ambient light sensor corresponding display screen area The duration that LED is closed.

15. according to the described in any item electronic equipments of claim 8-14, which is characterized in that the processor, also particularly useful for:

The ambient light sensor is repeatedly opened and closed, so that ambient light sensor total duration in the open state is full The default acquisition duration of foot.