CN110012162B - A method for collecting ambient light data and electronic equipment - Google Patents

Abstract

The present application provides a method for collecting ambient light data and electronic equipment, which relate to the technical field of electronic equipment and are used to reduce the amount of collected ambient light data. The method is applied to an electronic device in which an OLED display screen is covered above an ambient light sensor, and includes: detecting a display synchronous signal; in response to detecting the display synchronous signal, determining a first moment and a second moment, the first moment being the corresponding time of the ambient light sensor the LED in the display area corresponding to the ambient light sensor is turned off at the second time, 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 Keep the closed state between the second moment and the second moment; turn on the ambient light sensor, and the turn-on time of the ambient light sensor is no earlier than the first moment; turn off the ambient light sensor, and the turn-off time of the ambient light sensor is no later than the second moment.

Description

A method for collecting ambient light data and electronic equipment

technical field

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

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 based on the detected light intensity Adjusts the automatic backlight brightness of OLED displays in electronic devices.

When performing ambient light detection, since the OLED display itself also emits light, in order to avoid the impact of the brightness of the OLED display on the detection result, the following methods are usually used for detection. Specifically, the 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 OLED display screen that has not been detected can be obtained. Ambient light level for brightness interference.

However, the above solutions have high requirements on the performance of the light sensor, and the amount of ambient light intensity data collected at a high sampling rate is relatively large, thus requiring high data processing capabilities of the electronic equipment.

Contents of the invention

The present application provides a method for collecting ambient light data and an electronic device for reducing the amount of collected ambient light data.

In order to achieve the above object, the 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 and an ambient light sensor. For example, the electronic device can be a mobile phone, a video camera, etc., and the OLED display is covered above the ambient light sensor. The method includes: detecting a display synchronous signal, the display synchronous signal may be a synchronous signal when the display content is refreshed, such as a TE signal; in response to detecting the display synchronous signal, determining the first moment and the second moment, the first moment is the ambient light sensor The turn-on time of the LED in the corresponding display area, the second time is the turn-off time of the LED in the display area corresponding to the ambient light sensor, the first time is earlier than the second time, the LED in the display area corresponding to the ambient light sensor 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 turn-on 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 shutdown time of the ambient light sensor is no later than the second moment.

In the above technical solution, by detecting the display synchronous signal, the first and second moments corresponding to when the LEDs in the display area corresponding to the ambient light sensor remain off are determined, so that only the LEDs in the display area corresponding to the ambient light sensor Ambient light data is collected when the state is kept closed, thereby avoiding the influence of the light emission 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 amount of collected ambient light data can be reduced, and the requirement on the data processing capability 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 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 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; wherein, the third moment is when the display synchronization signal is detected The moment of delay is the moment of the first duration. The first duration is related to the single refresh duration of the OLED display and the turn-off duration of the LED in the display area corresponding to the ambient light sensor. The single refresh duration 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 way of determining the first moment is provided.

In a possible implementation manner of the first aspect, the first duration is a difference between a single refresh duration of the OLED display and an off duration of the LEDs in the display area corresponding to the ambient light sensor. The foregoing 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 LED in the display area corresponding to the ambient light sensor is used to refresh the next frame image of the OLED display; and/or, turning off the LED in the display area corresponding to the ambient light sensor The turning off of the LED is used 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 image of the OLED display screen, and/or the LEDs in the display area that are turned off when adjusting the brightness of the OLED display screen to collect environmental data. Light data, thereby improving the flexibility and diversity of collecting ambient light data, and at the same time improving the stability of the collected ambient light data.

In a possible implementation manner of the first aspect, the duration between the turn-on moment and the turn-off moment is the turn-off duration of the LED in the display area corresponding to the ambient light sensor when refreshing the next frame image of the OLED display screen. In the above possible implementation, the electronic device can control the ambient light sensor to collect ambient light data by using the duration of the LEDs in the display area that are turned off during refresh during the frame image refresh 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 duration between the turn-on moment and the turn-off moment is the turn-off duration of the LED in the display area corresponding to the ambient light sensor 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 by using the duration of the LEDs in the display area that are turned off during brightness adjustment during the brightness adjustment process of the OLED display screen, 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 being in the turned-on state meets a preset acquisition 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 stabilizing the ambient light data.

In a second aspect, an electronic device is provided, the electronic device includes: a processor, an OLED display and an ambient light sensor, the OLED display is covered above the ambient light sensor, and the processor is used to perform the following steps: detecting a display synchronization signal; responding When the display synchronization signal is detected, the first moment and the second moment are determined. The first moment is the turn-on moment of the LED in the display area corresponding to the ambient light sensor, and the second moment is the turn-off of the LED in the display area corresponding to the ambient light sensor. moment, 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 turn-on moment of the ambient light sensor is not earlier than the second moment A moment; turn off the ambient light sensor, and the turn off time 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 of the second aspect, the processor is further configured to: determine the second moment according to the third moment and the position of the ambient light sensor on the OLED display; The moment of the signal is delayed by a first duration, and the first duration is related to a single refresh duration of the OLED display screen and an off duration of the LED in the display area corresponding to the ambient light sensor.

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

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

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

In a possible implementation manner of the second aspect, the duration between the turn-on moment and the turn-off moment is the turn-off duration 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 off the ambient light sensor multiple times, so that the total duration of the ambient light sensor being in the turned-on state meets 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 it can achieve can refer to the beneficial effect in the corresponding method provided above, here I won't repeat them here.

Description of drawings

FIG. 1 is a schematic structural diagram of an electronic device provided in 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;

FIG. 3 is a schematic flow chart of the first ambient light data collection method provided by the embodiment of the present application;

FIG. 4 is a schematic diagram of a refresh-off display area provided by an embodiment of the present application;

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

FIG. 6 is a schematic flow diagram of a second ambient light data collection method provided in the embodiment of the present application;

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

FIG. 8 is a schematic flowchart of a third ambient light data collection method provided in the embodiment of the present application;

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

FIG. 10 is a schematic flowchart of a fourth ambient light data collection method provided by the embodiment of the present application;

FIG. 11 is a working timing diagram of the third OLED display screen under different brightness according to the embodiment of the present application.

Detailed ways

In this application, "at least one" means one or more, and "multiple" means two or more. "And/or" describes the association relationship of associated objects, indicating that there may be three types of relationships, for example, A and/or B, which can mean: A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one (unit) of a, b or c can represent: a, b, c, a-b, a-c, b-c or a-b-c, wherein a, b and c can be single or multiple. The character "/" generally indicates that the contextual 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 as examples, illustrations or illustrations. Any embodiment or design described herein as "exemplary" or "for example" is not to 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 related concepts in a concrete manner.

Figure 1 is a schematic structural diagram of an electronic device provided by the embodiment of the present application. The electronic device can be a mobile phone, a tablet computer, a computer, a wearable device, a vehicle-mounted device, an electronic terminal, a portable terminal, etc. For the convenience of description, this application implements collectively referred to as electronic equipment. Taking the electronic device as a mobile phone as an example, the structure of the electronic device will be illustrated below.

Referring to Fig. 1, the mobile phone may include: RF (radio frequency, radio frequency) circuit 110, memory 120, other input devices 130, display screen 140, sensor assembly 150, audio circuit 160, input/output (input/output, I/O ) subsystem 170, processor 180, and power supply 190 and other components. 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 140 , and a sensor component 150 .

Wherein, the RF circuit 110 can be used for sending and receiving information or receiving and sending 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 can also communicate with the network and other devices through wireless communication, such as communicating 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 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, at least one function-required application program, etc.; the data storage area can store data created according to 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, flash memory device, or other volatile solid-state storage devices.

Other input devices 130 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the mobile phone. Wherein, other input devices 130 may include but 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 or 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 the 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 OLEDs in multiple rows and columns.

Sensor assembly 150 includes one or more sensors for providing various aspects of status assessment for the handset. 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 can 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, orientation, opening/closing of the mobile phone state, or the 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 can provide 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 an audio signal for output; on the other hand, the microphone converts the collected audio signal into an electrical signal, which is received by the audio circuit converted into audio data, and then output the audio data to the RF circuit 110 for sending to another mobile phone, or output the audio data to the memory 120 for further processing.

The I/O subsystem 170 is used to control input and output 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, and 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, Execute various functions of the mobile phone and process data, so as 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 applications, etc., the modem processor mainly handles 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 supply power to the above-mentioned components. Wherein, the power supply may be logically connected to the processor 180 through the 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 can be shown in FIG. 2 , that is, the OLED display screen 140 can cover the top of the ambient light sensor 151 . Wherein, 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. 140 top cover as an example for illustration. In addition, the mobile phone may 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 to the mobile phone, and may include more or less components than shown in the figure, or combine some components, or arrange different components.

Fig. 3 is a schematic flow chart of the first ambient light data collection method provided by the embodiment of the present application. This method can be applied to the above-mentioned electronic device, and the OLED display screen in the electronic device is covered above the ambient light sensor. , the method may specifically be executed by a processor in the electronic device, referring to FIG. 3 , the method includes the following steps.

S301: Detecting a display synchronous signal, the display synchronous signal being a synchronous signal when display content is refreshed.

Among them, when displaying images, videos, etc., the OLED display is refreshed and displayed frame by frame, and the refresh display of each frame can be refreshed line by line in 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 LEDs of the display area refreshed each time are turned from on to off, that is, the corresponding area becomes black, and then the refreshed content is displayed on the display area. When the OLED display screen finishes refreshing the display content of a whole frame, it will output a display synchronous signal, which 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 the display synchronization signal output by the OLED display screen, and the display synchronization signal can specifically be a tearing effect (tearing effect, TE) signal, or other Signals that are synchronized with display content refresh, etc.

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

Wherein, the LEDs in the display screen area corresponding to the ambient light sensor may specifically refer to the LEDs in the display screen area above the ambient light sensor in the OLED display screen. The status 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 LED in the display area corresponding to the ambient light sensor is in the on state (also referred to as the on state), the ambient light data collected by the ambient light sensor will be affected by the LED in the display area because it is in the on state. Influence, that is, the collected ambient light data will include the light data of the surrounding environment and the light data of the LED in the display area at the same time; 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 subsequent ambient light sensor will not be affected, the electronic device can determine the time period when the LED in the display area corresponding to the ambient light sensor is 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 displayed content and the brightness adjustment process of the OLED display. This situation will be described.

The first one is the refresh process of display content.

Among them, as mentioned in S301 above, during the refresh process of one frame, the display area refreshed each time will first turn black, and then display the refreshed content in the refreshed display area, and the refreshed display area It will first turn black, specifically by turning off the LEDs in the refreshed display area, that is, the LEDs in the refreshed display area are in the off state at this time, and subsequently called the refresh-off display area. When the display area where the refresh is turned off moves to the display area corresponding to the ambient light sensor (that is, the closing of the LED in the display area corresponding to the ambient light sensor is used to refresh the next frame image of the OLED display screen, specifically as shown in Figure 4 display), determine the first moment and the second moment, and the period between the first moment and the second moment is the time period in which it is determined that the LED in the display area where the refresh is turned off is in an 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 entire frame is completed, and the time when the LEDs in the display area where the refresh is turned off is also completed The moment when the display content of the entire frame is refreshed, that is, for the same frame, the display synchronous signal corresponding to the frame is synchronized with the turn-off moment of the LED in the refresh-off display area. Therefore, based on this synchronization relationship, it is possible to determine the turn-off moment of the LEDs in the refresh-off display area.

In a possible implementation manner, when the LED in the display area where the refresh is turned off is the LED 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 position of the ambient light sensor on the OLED display screen determines the second moment. Specifically, the electronic device may determine the second moment according to the moment when the display synchronization signal is detected, the single refresh duration of the OLED display and the position of the ambient light sensor on the OLED display. The moment when the display synchronous signal is detected here may refer to the moment when the display synchronous signal is detected when the first frame is refreshed, and the second moment may refer to the LED in the display area where the refresh is turned off during the second frame refresh process. At the time 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 60Hz, so the single refresh time is approximately equal to 16.667 milliseconds (ms). The position of the ambient light sensor on the OLED display can be 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 is subsequently referred to as the first moving duration , for example, the first moving duration can be equal to L/V1, L represents the distance from the ambient light sensor to the top of the OLED display, V1 represents the moving speed of the display area where the refresh is turned off, and the moving speed V1 can be equal to the OLED display The ratio of the length of the OLED display to the single refresh time of the OLED display.

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

Wherein, the brightness adjustment of the OLED display screen may include two working modes, that is, a pulse-width modulation (Pulse-width modulation, PWM) mode and a non-PWM mode, and a duty cycle adjustment signal is required in the PWM mode (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. 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, so as to realize the brightness adjustment of the OLED display. In the off state for a period of time, the LEDs in this display area will be referred to as the LEDs in the display area where the brightness adjustment is turned off. Non-PWM mode can mean that when the brightness of the OLED display is high, it is no longer possible to adjust the brightness of the OLED display through the PWM mode, and the brightness of the OLED display can only be adjusted by increasing the power supply current and other methods. There are LEDs in the display area that are 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 LED in the display area corresponding to the ambient light sensor is used to adjust the brightness of the OLED display screen), determine the first moment and the second moment is the time period during which the LED in the display area where the brightness adjustment is turned off is determined to be in the off state.

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

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

In a possible implementation manner, when the LED in the display area where the brightness adjustment is turned off is the LED 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 position 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 moment when the display synchronization signal is detected, the single refresh duration of the OLED display and the position of the ambient light sensor on the OLED display. The moment when the display synchronization signal is detected here may refer to the moment when the display synchronization signal is detected when the first frame is refreshed, and the second moment may refer to the display area where the brightness adjustment is turned off during the brightness adjustment process 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 where the brightness adjustment is turned off, one second moment may be determined, or multiple second moments may be determined.

Wherein, the duration of a single refresh of the OLED display is known. The position of the ambient light sensor on the OLED display screen can be 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, which is subsequently referred to as the second movement duration.

Exemplarily, assuming that the second moving duration is T _S2 and the single refresh duration is T _f , the electronic device may delay the moment when the display synchronization signal is detected by N/N of the single refresh duration T _f (ie T _f *i/N, the value of i can be 1 to N respectively), if the second moving duration T _S2 is zero, then can directly obtain multiple second moments, if the second moving duration T _S2 is not zero, Then, the times delayed by T _f *i/N can be further delayed by T _S2 , so as to obtain multiple second times. Further, after determining the plurality of second moments, the corresponding plurality of first moments can be determined according to the turn-off duration T _b2 of the LEDs in the closed display area according to the brightness adjustment. The duration T _b2 is determined by the brightness of the OLED display, and the brightness of the OLED display is controlled by the electronic device, that is, the electronic device can directly determine the shutdown duration T _b2 through the brightness, and the electronic device advances the multiple first moments respectively by the The closing duration T _b2 can determine the corresponding multiple first moments.

Exemplarily, assuming that the refresh frequency is 60 Hz and the frequency of the duty ratio adjustment signal is 240 Hz, the four display areas where the brightness adjustment is turned off are respectively the first closed area, the second closed area, and the third closed area in FIG. 5 . For the closed area and the fourth closed area, the second moving duration T4 is zero as an example, when the first closed area, the second closed area, the third closed area and the fourth closed area respectively move to the display screen area corresponding to the ambient light sensor The first times of 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 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 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 an enabling signal to the ambient light sensor at a certain moment no earlier than the first moment, so that the ambient light sensor starts to collect ambient light data when receiving the enabling signal, and An end signal is sent to the ambient light sensor at a certain point in the second moment, so that the ambient light sensor stops collecting ambient light data when receiving the end signal. Afterwards, the processor of the electronic device can also cache the ambient light data collected by the ambient light sensor, and adjust the brightness of the backlight of the OLED display 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 moment and the second moment, and the specified period is the time period from the moment when the ambient light sensor is turned on to the moment when the ambient light sensor is turned off (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 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, at this time, the specified duration is equal to the duration from the first moment to the second moment; or, the electronic device may turn on the ambient light sensor at the second moment; Turn on the ambient light sensor at a certain moment after the first moment, and turn off the ambient light sensor at a certain moment before the second moment or the second moment, at this time, the specified duration is shorter 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 moment or at a certain moment after the first moment, and turns off the ambient light sensor at a certain moment before the second moment. 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 may be related to the off time of the LED in the display area corresponding to the ambient light sensor.

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

Alternatively, the designated time period is a time period for turning off the LEDs in the display area corresponding to the ambient light sensor when adjusting the brightness of the OLED display screen. That is, in the second case of S302 above, the LED in the display area where the 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 that the specified duration can specifically be the turn-off duration of the LEDs in the display area where the brightness adjustment 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 time the ambient light sensor is in the on state (that is, the total collection time) meets the preset collection time, that is, control the ambient light sensor to collect the ambient light data. The total duration is the preset acquisition duration, and the preset acquisition duration may include multiple specified durations within a single refresh duration of one frame or multiple frames, and each frame may correspond to one or more specified durations. By turning on and off the ambient light sensor multiple times so that 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. stability, and at the same time have lower requirements on the performance of the ambient light sensor, such as sensitivity and sampling rate.

For ease of understanding, the display synchronization signal is used as the TE signal below, and the ambient light sensor is located at the top of the OLED display (that is, the first moving duration T _S1 and the second moving duration T _S2 are zero), and the refresh rate of the OLED display is When the duty ratio adjustment signal is 60 Hz and the frequency is 240 Hz, the brightness of the OLED display screen is respectively low brightness, medium brightness and high brightness as an example to illustrate the method provided in the embodiment of the present application. Low brightness and medium brightness are examples of two kinds of brightness of OLED display working in PWM mode, and high brightness is an example of brightness of OLED display working in non-PWM mode.

Exemplarily, as shown in FIG. 6, the method may include: S401. Detecting the TE signal; S402. Responding to the detection of the TE signal, delaying the moment when the TE signal is detected by T _f -T ₀ , where T _f represents a single Refresh duration, _T0 represents the first specified duration; S403. Turn on the ambient light sensor, and after the first specified duration _T0 , turn off the ambient light sensor, that is, control the ambient light sensor to collect ambient light data within the first specified duration _T0 ; S404. Obtain the 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, it will end. The preset acquisition time length returns to S401 to continue execution.

Based on the method provided in FIG. 6 above, the working timing diagrams of the OLED display screen at low brightness, medium brightness and high brightness respectively can be 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 specifically the situation shown in _FIG . 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 _T0 is less than the shutdown duration of the LED in the display area corresponding to the ambient light sensor; when the brightness of the OLED display screen is higher brightness , 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 Figure 8, the method may include: S501. Detecting the TE signal; S502. Judging whether the OLED display is working in PWM mode, if not, execute according to S402-S403 provided in Figure 6 (that is, under higher brightness, follow The method provided in FIG. 6 is executed), if so, the following S503a and S503b are executed; S503a. In response to detecting the TE signal, delay (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 collect ambient light data within the first specified time period 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, it will end. If the total collection time does not reach the preset collection time, return to S501 to continue implement.

Based on the above method provided in FIG. 8 , the working timing diagrams of the OLED display screen at low brightness, medium brightness and high brightness respectively can 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 area corresponding to the ambient light sensor is in the off state, which specifically refers to the situation shown in Fig. 5 above. The light sensor collects ambient light data within four first specified durations _T0 within a single refresh duration _Tf ; when the brightness of the OLED display is relatively high, the LED in the display area corresponding to the ambient light sensor is turned off The state may specifically be the situation 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 _T0 is shorter than the off duration of the LED in the display area corresponding to the ambient light sensor; when the brightness of the OLED display screen is higher brightness , the first designated duration T ₀ designated duration is equal to the off duration of the LED in the display screen area corresponding to the ambient light sensor.

Or, as shown in FIG. 10, the method may include: S601. Detecting the TE signal; S602. Judging whether the OLED display is working in PWM mode, if not, perform according to S402-S403 provided in FIG. The method provided in FIG. 6 is executed), if so, execute 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 duration of a single refresh, T ₁ represents the second specified duration; S603b. Control ambient light Second designation of sensors after delays of (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 the duration _T1 ; 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 above method provided in FIG. 10 , the working timing diagrams of the OLED display screen at low brightness, medium brightness and high brightness respectively can be 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 area corresponding to the ambient light sensor is in the off state. Specifically, it may be the situation shown in Fig. 5 above. Collect four ambient light data of a second specified duration _T1 within a single refresh duration _Tf ; when the brightness of the OLED display is relatively high, the LED in the display area corresponding to the ambient light sensor is in an 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 _T1 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 Fig. 7, Fig. 9 and Fig. 11, the brightness of the OLED display screen is the timing diagram corresponding to the low brightness, medium brightness and high brightness, and the low level can indicate that the brightness of the OLED display screen is For the LEDs in the display area that are in the off state, the high level can indicate the LEDs in the display area that are in the on state in the OLED display screen.

In the embodiment of the present application, the electronic device detects the display synchronous signal to determine the first and second moments corresponding to when the LED in the display area corresponding to the ambient light sensor remains off, so that only the LED corresponding to the ambient light sensor The ambient light data is collected when the LED in the display area remains off, thereby avoiding the influence of the light emission 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 data volume of collected ambient light data and reduce the data processing capability 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. The positional relationship of 151 may be as shown in FIG. 2 above.

In the embodiment of the present application, the processor 180 in the electronic device can be used to perform the following steps: detect the display synchronization signal; and determine the first moment and the second moment in response to the detection of the display synchronization signal. The first moment is the ambient light sensor 151 corresponds to the turn-off time of the LED in the display area, 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 turn-on moment of the ambient light sensor 151 is not earlier than the first moment; when the ambient light sensor 151 is turned off, the turn-off moment of the ambient light sensor 151 is not later 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 140 . In addition, the processor 180 is also specifically configured to: determine the first moment according to the third moment and the position of the ambient light sensor 151 on the OLED display screen 140; wherein, the third moment is the time when the display synchronization signal is detected and delayed by the first time. The first duration is related to a single refresh duration of the OLED display 140 and an off duration of the LEDs in the display area corresponding to the ambient light sensor 151 . Wherein, the first duration may be a difference between a single refresh duration of the OLED display 140 and an off duration of LEDs in the display area corresponding to the ambient light sensor 151 .

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

Optionally, the duration between the turn-on moment and the turn-off moment is the turn-off duration of the LED in the display area corresponding to the ambient light sensor 151 when refreshing the next frame of image of the OLED display 140; or, the period between the turn-on moment and the turn-off moment The duration is the duration for which 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 also specifically configured to: turn on and off the ambient light sensor 151 multiple times, so that the total duration of the ambient light sensor 151 being in the on state meets the preset acquisition duration.

It should be noted that for the description of the functions corresponding to the processor 180, the OLED display 140, and the ambient light sensor in the electronic device, please refer to the description of the relevant content of the steps involved in the above-mentioned method embodiment, and the embodiment of the present application does not describe Let me repeat.

In the embodiment of the present application, the electronic device detects the display synchronous signal to determine the first and second moments corresponding to when the LED in the display area corresponding to the ambient light sensor remains off, so that only the LED corresponding to the ambient light sensor The ambient light data is collected when the LED in the display area remains off, thereby avoiding the influence of the light emission 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 data volume of collected ambient light data and reduce the data processing capability requirements of electronic equipment.

Finally, it should be noted that: the above is only a specific implementation of the application, but the scope of protection of the application is not limited thereto, and any changes or replacements within the technical scope disclosed in the application shall be covered by this application. within the scope of the application. Therefore, the protection scope of the present application should be determined by the protection scope of the claims.

Claims (9)

1. An ambient light data collection method, characterized by being applied to an electronic device comprising an OLED display screen and an ambient light sensor, wherein the OLED display screen is covered above the ambient light sensor, the method comprising:

detecting a display synchronization signal;

in response to detecting the display synchronization signal, determining a first moment and a second moment, wherein the first moment is the closing moment of the OLED of the display screen area corresponding to the ambient light sensor, the second moment is the opening moment of the OLED of the display screen area corresponding to the ambient light sensor, the first moment is earlier than the second moment, and the OLED of the display screen area corresponding to the ambient light sensor is kept in a closing state between the first moment and the second moment;

opening the ambient light sensor, wherein the moment of opening the ambient light sensor is not earlier than the first moment;

Turning off the ambient light sensor, wherein the time of turning off the ambient light sensor is not later than the second time;

determining the second time comprises: the moment when the display synchronization signal is detected delays the single refreshing time of the OLED display screen and then delays the moving time to obtain the second moment, wherein the moving time is the time required by the closed display screen area when the display screen area moves from the uppermost part of the OLED display screen to the display screen area corresponding to the ambient light sensor;

determining the first time includes: and advancing the second time to obtain the first time by the closing time of the OLED of the display screen area corresponding to the ambient light sensor.

2. The method of claim 1, wherein between the first time and the second time, the image of the OLED display screen is refreshed.

3. The method of claim 1, wherein the brightness of the OLED display screen is adjusted between the first time and the second time.

4. A method according to any one of claims 1-3, wherein the method further comprises:

and opening the ambient light sensor for a plurality of times, so that the total time length of the ambient light sensor in the opening state is longer than the preset time length.

5. An electronic device, comprising: a processor, an OLED display screen and an ambient light sensor, the OLED display screen overlying the ambient light sensor, the processor for performing the steps of:

detecting a display synchronization signal;

in response to detecting the display synchronization signal, determining a first moment and a second moment, wherein the first moment is the on moment of the OLED of the display screen area corresponding to the ambient light sensor, the second moment is the off moment of the OLED of the display screen area corresponding to the ambient light sensor, the first moment is earlier than the second moment, and the OLED of the display screen area corresponding to the ambient light sensor is kept in an off state between the first moment and the second moment;

starting the ambient light sensor, wherein the starting time of the ambient light sensor is not earlier than the first time;

closing the ambient light sensor, wherein the closing time of the ambient light sensor is not later than the second time;

the processor is specifically configured to: the moment when the display synchronization signal is detected delays the single refreshing time of the OLED display screen and then delays the moving time to obtain the second moment, wherein the moving time is the time required by the closed display screen area when the display screen area moves from the uppermost part of the OLED display screen to the display screen area corresponding to the ambient light sensor;

The processor is further specifically configured to: and advancing the second time to obtain the first time by the closing time of the OLED of the display screen area corresponding to the ambient light sensor.

6. The electronic device of claim 5, wherein turning off the OLED of the display screen area corresponding to the ambient light sensor is used to refresh a next frame of image of the OLED display screen;

and/or the closing of the OLED of the display screen area corresponding to the ambient light sensor is used for adjusting the brightness of the OLED display screen.

7. The electronic device of claim 5 or 6, wherein the duration between the on time and the off time is an off duration of an OLED of a display screen area corresponding to the ambient light sensor when a next frame of image of the OLED display screen is refreshed.

8. The electronic device of claim 5 or 6, wherein the duration between the on time and the off time is a duration of OLED off of a display screen area corresponding to the ambient light sensor when adjusting the brightness of the OLED display screen.

9. The electronic device according to claim 5 or 6, wherein the processor is further specifically configured to:

And opening and closing the ambient light sensor for a plurality of times, so that the total time length of the ambient light sensor in the opening state meets the preset acquisition time length.

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