CN112242119A - Terminal, display parameter control method and device, and storage medium - Google Patents

Terminal, display parameter control method and device, and storage medium Download PDF

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Publication number
CN112242119A
CN112242119A CN201910640219.0A CN201910640219A CN112242119A CN 112242119 A CN112242119 A CN 112242119A CN 201910640219 A CN201910640219 A CN 201910640219A CN 112242119 A CN112242119 A CN 112242119A
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China
Prior art keywords
display
display area
sensor
driving
dimming mode
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CN201910640219.0A
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Chinese (zh)
Inventor
李洪鹏
高静
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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Priority to CN201910640219.0A priority Critical patent/CN112242119A/en
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
    • G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
    • G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
    • G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of El Displays (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The disclosure relates to a terminal, a control method and device of display parameters and a storage medium, wherein the terminal comprises a display screen, the display screen at least comprises a first display area and a second display area, and the first display area is provided with a Pulse Width Modulation (PWM) dimming mode; the sensor is positioned below the first display area and used for acquiring ambient light information through gaps among pixels of the first display area in a time period when a pulse value of the first display area for pulse power supply based on a PWM dimming mode is zero; and the controller is connected with the sensor and used for controlling the display parameters of the first display area and the second display area based on the ambient light information acquired by the sensor. Through the technical scheme of this disclosure, make the display area of sensor top adjust luminance through PWM mode of adjusting luminance to make the sensor carry out ambient light when the pixel is luminous and gather, reduce the luminous condition that influences the sensor precision of pixel self.

Description

Terminal, display parameter control method and device, and storage medium
Technical Field
The present disclosure relates to display technologies, and in particular, to a terminal, a method and an apparatus for controlling display parameters, and a storage medium.
Background
In the related art, with the rapid development of consumer electronics, the screen occupation ratio of the display screen of the electronic product is required to be gradually increased, and the narrow-frame display screen and even the frameless display screen are called the mainstream development trend of the electronic product. Therefore, the development of the under-screen technology of the sensors, cameras and other components of the electronic products is started, so that the use of the frameless full-face screen is further developed.
The under-screen light sensor is a typical under-screen technology, and the influence of luminous flux caused by the self luminescence of a display screen is eliminated as much as possible through calibration and a corresponding algorithm, so that the measurement of the illuminance of ambient light is realized. However, in the related art, when the illuminance of the ambient light is measured by the off-screen light sensor, the measurement accuracy is low, and particularly, when the illuminance is low, the measurement accuracy is greatly reduced.
Disclosure of Invention
The disclosure provides a terminal, a control method and device of display parameters and a storage medium.
According to a first aspect of the embodiments of the present disclosure, there is provided a terminal, including:
the display screen at least comprises a first display area and a second display area, wherein the first display area is provided with a Pulse Width Modulation (PWM) dimming mode;
the sensor is positioned below the first display area and used for acquiring ambient light information through gaps among pixels of the first display area in a time period when a pulse value of the first display area for pulse power supply based on the PWM dimming mode is zero;
and the controller is connected with the sensor and used for controlling the display parameters of the first display area and the second display area based on the ambient light information acquired by the sensor.
In the above solution, the display screen further includes:
the first driving assembly is positioned at the periphery of the second display area adjacent to the first display area, is connected with the first display area and is used for driving the first display area to display based on the PWM dimming mode;
and the second driving component is positioned at the periphery of the second display area, is connected with the second display area and is used for driving the second display area to display based on the dimming mode except the PWM dimming mode.
In the foregoing scheme, the second driving component is configured to drive the second display area to display based on a direct-current dimming mode.
In the above scheme, the first display area range covers a field angle range of the sensor and covers a range where the sensor is located; wherein the field angle range is a range covered by the field angle of the sensor on the display screen.
In the above solution, the display screen further includes:
the third driving assembly is positioned at the periphery of the second display area, is connected with the first display area and the second display area and is used for providing scanning driving signals; the scanning driving signal is used for starting the display function of the pixels in the first display area and the second display area.
In the above scheme, the third driving component is further configured to provide a reset signal; the reset signal is used for clearing the scanning driving signal. According to a second aspect of the embodiments of the present disclosure, there is provided a method of controlling a display parameter, the method including:
in a time period when a pulse value for pulse power supply of a first display area of a display screen in a Pulse Width Modulation (PWM) dimming mode is zero, triggering a sensor to acquire ambient light information through gaps among pixels of the first display area, wherein the display screen further comprises a second display area;
and controlling display parameters of the first display area and the second display area according to the ambient light information.
In the foregoing solution, the controlling the display parameters of the first display area and the second display area according to the ambient light information includes:
driving the first display area to display in the PWM dimming mode according to the ambient light information;
and driving the second display area to display in a dimming mode other than the PWM dimming mode according to the ambient light information.
In the foregoing aspect, the driving the second display region to display based on the dimming mode other than the PWM dimming mode includes:
and driving the second display area to display based on the direct current dimming mode.
According to a third aspect of the embodiments of the present disclosure, there is provided a control apparatus of a display parameter, the apparatus including:
the sensor module is used for acquiring ambient light information through gaps among pixels of a first display area in a time period when a pulse value of pulse power supply to the first display area of the display screen in a Pulse Width Modulation (PWM) dimming mode is zero, and the display screen further comprises a second display area;
and the control module is used for controlling the display parameters of the first display area and the second display area according to the ambient light information.
In the above aspect, the control module includes:
the first driving submodule is used for driving the first display area to display in the PWM dimming mode according to the ambient light information;
and the second driving submodule is used for driving the second display area to display in a dimming mode other than the PWM dimming mode according to the ambient light information.
In the foregoing scheme, the second driving sub-module is specifically configured to drive the second display area to display based on a direct-current dimming mode.
According to a fourth aspect of the embodiments of the present disclosure, there is provided a control apparatus for displaying a parameter, the apparatus including at least: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is used for executing the executable instructions, and the executable instructions execute the steps in any one of the display parameter control methods.
According to a fifth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium having stored therein computer-executable instructions, which when executed by a processor, implement the steps in any one of the above-mentioned control methods for display parameters.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: for a sensor arranged below a display screen, ambient light brightness needs to be acquired through gaps between pixels on the display screen. This scheme makes the display area of sensor top adjust luminance through PWM mode of adjusting luminance to make the sensor carry out ambient light when the pixel is not luminous and gather, reduce the luminous influence of pixel self to the influence of the sensing precision of sensor, promoted the sensing accuracy. In addition, the second display area can be dimmed in other dimming modes, and the display effect of the display screen is ensured.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is an equivalent schematic diagram of a display cell circuit in an OLED display screen according to one exemplary embodiment;
FIG. 2 is a block diagram illustrating the components of a terminal according to one exemplary embodiment;
fig. 3 is a schematic diagram illustrating a constituent structure of another terminal according to an exemplary embodiment;
fig. 4 is a schematic diagram illustrating a structure of a terminal according to another exemplary embodiment;
FIG. 5 is a flowchart illustrating an implementation of a method for controlling display parameters according to an exemplary embodiment;
FIG. 6 is a schematic diagram illustrating the components of a display screen having an off-screen light sensor in accordance with one exemplary embodiment;
FIG. 7 is a schematic diagram illustrating a distribution structure of GOAs in an OLED display screen according to an exemplary embodiment;
FIG. 8 is a schematic diagram illustrating a distribution of control circuits according to an exemplary embodiment;
FIG. 9 is a block diagram illustrating a control device displaying parameters in accordance with an exemplary embodiment;
FIG. 10 is a block diagram illustrating a control device displaying parameters in accordance with an exemplary embodiment;
fig. 11 is a block diagram illustrating a physical structure of a control apparatus for displaying parameters according to an exemplary embodiment.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
A TFT (Thin Film Transistor) layer of an OLED (Organic Light-Emitting Diode) display screen is mainly composed of a plurality of transistors and capacitors distributed in an array form, and the brightness of each pixel of the display screen can be adjusted by controlling the switching of different transistors through different current signals. Fig. 1 is an equivalent schematic diagram of a display unit circuit in an OLED display panel, as shown in fig. 1, an OLED is a light emitting element of the pixel, the luminance value of the pixel can be controlled by controlling a current signal flowing through the OLED, and a plurality of OLEDs emit light with different luminances to form a displayed picture. Since the OLED has no backlight, when the overall brightness of the display screen is adjusted, the current signal flowing through each pixel can be adjusted as a whole, so as to control the overall brightness of the screen.
Driving an OLED to emit light at a specified brightness can be done in two ways:
first, DC (Direct Current) dimming mode.
In fig. 1, the switch T1 is used as a switch of the scan line S1 at the current pixel, and when the scan line S1 provides an on signal, the scan switch T1 is turned on, and the row of the current pixel in the pixel array is turned on. At this time, the data signal provided by the data line D1 can be transmitted to the driving switch T2, and the driving switch T2 is turned on to an extent corresponding to the amplitude of the data signal under the action of the capacitor C and the data signal provided by the data line D1. The voltage Vdd supplied by the power line P1 is unchanged, and when the driving switch T2 is turned on to a certain degree, a corresponding amount of current is passed through the driving switch, and the OLED is driven to emit light with a corresponding brightness. In this process, Emission (light Emission control electrode), i.e., the input signal of the control electrode Em of the switching luminance switch T3 is not changed, and the luminance switch T3 is always kept on.
In this process, the brightness of each pixel in the OLED display panel is controlled by the data signal provided by the data line D1. When the scan line scans the pixels of each row, the data signal needs to change the voltage amplitude according to the brightness required by each pixel.
In the mode, a continuous data signal can be provided to each pixel in a direct current mode, and the amplitude of the data signal only needs to be changed according to the requirement of the brightness proportion in each change period, so that the power consumption is saved; moreover, the mode can reduce stroboflash as much as possible, thereby reducing the damage to eyes caused by screen flicker. However, in this manner, the scanned-on pixels are always kept in a light-emitting state, and when the light sensor under the application screen detects external light, the pixels are disturbed.
Second, a PWM (Pulse Width Modulation) dimming mode.
In this mode, the signal provided by the data line D1 in fig. 1 is unchanged, and during the period when the scan line S1 provides the turn-on signal, the scan switch T1 is turned on to transmit the data signal to the driving switch T2, so that the driving switch T2 is turned on, and the voltage Vdd provided by the power line P1 remains unchanged. In this process, the turn-on degree of the driving switch T2 of all the pixels is the same, and therefore, the turn-on state of the brightness switch T3 needs to be controlled to adjust the brightness of the OLED in the pixel.
Here, the adjustment method is to control the switching of the current path by the PWM signal input from Em. The PWM signal is an ac signal with a certain frequency and duty ratio provided according to the brightness requirement of the pixel, and because the frequency of the PWM signal is much higher than the resolving power of human eyes, the brightness of the pixel can change along with the change of the duty ratio of the PWM signal in visual effect. For example, when the duty ratio of the PWM signal is 100%, that is, a constant dc signal, the OLED is always on the path through which current passes, and the OLED is brightest, and when the PWM signal controls the brightness switch T3 with a high frequency signal having a duty ratio of 50%, the OLED is on the path through which current passes 50% of the time, and no current passes the other 50% of the time, so that the brightness of the pixel is visually reduced by half.
By controlling the brightness of each pixel in the OLED display screen in the two modes, the OLED display screen can display pictures with different brightness.
In this way, the brightness of the pixel is controlled by using a high-frequency alternating electrical signal with a certain duty ratio, and in order to ensure the display effect, the frequency of the alternating electrical signal needs to be higher than the frequency that can be recognized by human eyes, so that the generation of the flickering visual effect can be avoided. However, such a high-frequency alternating electrical signal causes a large power consumption.
When the light sensor under the screen needs to be used, the mode enables the light sensor not to be influenced because the pixel does not emit light in the time period when the brightness of the pixel is 0, namely the time period when the PWM signal is a signal for turning off the brightness switch. That is to say, this kind of PWM mode of adjusting luminance can promote light sensor's detection precision, but can cause the great consumption of whole OLED to because the PWM signal is high frequency alternating electrical signal, can make the screen produce the scintillation of high frequency, even eyes are difficult for perceiving, nevertheless can also cause the injury to eyes, do not accord with the demand to display screen eyeshield at present.
Therefore, the two brightness adjusting modes are simultaneously applied to different areas of the same display screen, in the application scene of the ambient light sensor under the screen, the display screen area with a certain size above the sensor is set to be in the PWM dimming mode, other areas adopt the DC dimming mode, and the size and the number of the PWM dimming areas can be adjusted according to the application scene.
The following description is made in conjunction with the accompanying drawings and examples.
An embodiment of the present application provides a terminal, as shown in fig. 2, the terminal 100 includes:
a display screen 110 including at least a first display region 111 and a second display region 112, wherein the first display region has a Pulse Width Modulation (PWM) dimming mode;
a sensor 120, located below the first display area 111, for collecting ambient light information through gaps between pixels of the first display area in a time period when a pulse value of the first display area 111, which is pulse-powered based on the PWM dimming mode, is zero;
and the controller 130 is connected with the sensor 120 and is used for controlling the display parameters of the first display area 111 and the second display area 112 based on the ambient light information collected by the sensor.
Here, the display area of the display screen is divided into a first display area and a second display area, and the first display area is an area corresponding to a position where a sensor provided under the screen is located. The environment light information is information detected by the sensor in the environment of the terminal, and comprises environment light brightness, luminous flux, light color, light temperature and the like; the display parameters include display brightness, gray level, display saturation and other parameters. The following description will be given taking the ambient light brightness and the display brightness as examples.
The sensor is arranged below the first display area and is a photosensitive device used for collecting the brightness of the ambient light. Since the pixels of the display screen emit light, in order to reduce the interference of light emitted by the pixels with the ambient light brightness collected by the sensor during display, the sensor needs to collect the ambient light brightness when the pixels do not emit light.
In order to realize that the sensor can normally collect the ambient light brightness when the display screen displays a picture, the pixels in the first display area are enabled to emit light at a certain frequency by setting a PWM dimming mode for the first display area. In the PWM mode, the signal for driving the first display region to emit light is a pulse signal having a certain frequency, and when the pulse value is zero, the corresponding pixel is in a non-light-emitting state, but the duration of the non-light-emitting state is short, which is difficult for the human eye to perceive, and the user perceives continuous display of the display based on the persistence of vision. At this time, the sensor can acquire the ambient light brightness through the gaps between the pixels without being influenced by the self-luminescence of the pixels.
The reason why the sensor is used for acquiring the ambient light brightness is that the ambient light brightness affects the display effect of the display screen. When the ambient light brightness is high, if the brightness of the display screen is too low, the display is not clear; when the ambient light brightness is low, if the brightness of the display screen is too high, the eyes of the user can be injured. Therefore, the display brightness of the display screen should change along with the ambient light brightness, so as to ensure that the display effect under different scenes is optimal.
Therefore, the terminal further comprises a controller, which can acquire data corresponding to the ambient light brightness acquired by the sensor and control the display brightness of the display screen according to the ambient light brightness, that is, control the brightness of the first display area and the second display area.
In some embodiments, the display size of the first display area is smaller than the display size of the second display area; the second display region surrounds the second display region.
Since the size of the sensor is usually much smaller than that of the display screen, the second display area is a normal display area and occupies most of the area of the display screen; the first display area is an area having a PWM dimming mode separately set to adapt to the function of the sensor, and therefore, the size of the first display area is determined according to the sensor, that is, the display size of the first display area is smaller than that of the second display area, and the peripheral display areas of the first display area are the second display area.
Setting the size of the first display region to a smaller size can reduce the effect of the PWM dimming mode on the visual effect of the entire screen. To the visual effect of whole display screen, then embody by the second display area who occupies most sizes, because the second display area can choose for use the mode of adjusting luminance that is favorable to the display effect more, consequently, can make the wholeness of screen display screen better like this, guaranteed the sensor precision under the screen promptly, compromise the holistic display effect of display screen again. The problems of flicker and the like caused by a PWM dimming mode are reduced, and the eye protection requirement is guaranteed.
In some embodiments, as shown in fig. 3, the terminal further comprises a first drive assembly 210 and a second drive assembly 220;
the first driving component 210 is located at the periphery of the second display region 112 adjacent to the first display region 111, and is connected to the first display region 111, and is configured to drive the first display region 111 to display based on the PWM dimming mode.
The second display module 220 is located at the periphery of the second display area 112, connected to the second display area, and configured to drive the second display area to display based on a dimming mode other than the PWM dimming mode.
The display of the display panel requires a driving circuit to provide a driving signal, for example, a Gate driver On Array (GOA) circuit disposed On a glass substrate of the display panel. The driving circuit is located at the periphery of the display area, is connected with the display area and provides driving signals for the display area, so that the display area displays corresponding pictures.
Since the first display region in the embodiment of the present application adopts the PWM dimming mode, and the second display region adopts other dimming modes except the PWM dimming mode, for example, the dc dimming mode, different dimming modes adopt driving circuits supporting different dimming modes to respectively perform display driving of the first display region and the second display region.
Here, the first driving component 210 is provided to provide the driving signal only for the first display region based on the PWM dimming mode. Therefore, the first driving assembly 210 is connected to the first display region 111 and disposed at a peripheral region of the entire display screen closer to the first display region 111. Since the second display region 112 surrounds the first display region 111, the first driving element 210 is actually disposed at the periphery of the second display region 112.
The second driving component 220 is used for normally driving the second display region 112 to display, and adopts a dimming mode different from the PWM dimming mode, which can be set according to the requirement of the practical application. The second driving assembly 220 is disposed at the periphery of the second display region 112, for example, in both side regions of the display screen.
In some embodiments, the second driving component 220 is configured to drive the second display area 112 to display based on the dc dimming mode.
In the direct current dimming mode, the opening degree of the control switch is adjusted by controlling the magnitude of the driving voltage of the pixel, so that the display brightness of the pixel is adjusted. In this mode, the display brightness of the pixels is slowly changed, and high-frequency flicker is not generated, so that better image quality effect can be provided, and the requirement of eye protection is facilitated. Since the second display area covers most of the display screen, the second display area is displayed in the dc dimming mode.
In some embodiments, the first display area covers a field angle range of the sensor and covers a range in which the sensor is located; wherein the field angle range is a range covered by the field angle of the sensor on the display screen.
Since optical elements have a field angle, the range of the field angle of the optical sensor determines the range of the light reception, and the larger the field angle, the larger the range of the collected light. The above-mentioned field angle can be understood as a cone extending from the plane of the sensor to the plane of the display screen, and a certain coverage area is formed on the screen of the display screen, and the coverage area is represented by the above-mentioned field angle range. In order not to affect the light sensitivity of the sensor, the range of the first display region should cover the field angle range, that is, the area of the first display region is equal to or larger than the area of the field angle range. The range of the first display area described above should also take into account the shape of the sensor, that is, the first display area needs to cover the area where the sensor is located at the same time, considering that different sensors may have different shapes and the field angle range may not completely cover the sensor. Therefore, the use of the sensor can be ensured not to be interfered by dimming in the second display area, and the ambient light brightness can be fully acquired in the field angle range.
In some embodiments, the display screen further includes:
the third driving assembly is positioned at the periphery of the second display area, is connected with the first display area and the second display area and is used for providing scanning driving signals; the scanning driving signal is used for starting the display function of the pixels in the first display area and the second display area.
The third driving assembly includes gate scan driving circuits of different levels respectively connected to the pixels of each row for providing scan driving signals. And the grid scanning driving circuit of each stage is sequentially switched on, and scanning driving signals are respectively provided to the grids of the control switches of each row of pixels in the display screen, so that the display function of each row of pixels is sequentially switched on. When the display function of a row of pixels is started, each pixel of the row displays corresponding gray scale brightness according to the data signal provided by the data line. Then switching to the next stage, and starting the display function of the pixels in the next row. When each line of the whole display screen is scanned, the display of one frame of picture is finished. Because the scanning frequency of the scanning driving unit is high, human eyes cannot detect the scanning, and because the human eyes have a vision temporary storage phenomenon, although the display screen carries out line-by-line scanning and displays data of each line in sequence, the display screen is a complete picture for human eyes to feel.
In some embodiments, the third driving component is further configured to provide a reset signal; the reset signal is used for clearing the scanning driving signal.
The reset signal is provided by a reset circuit unit in the third driving assembly; the reset circuit unit is connected with each row of pixels in the display screen. When the reset circuit unit provides a reset signal, the current scanning driving signal is cleared, and the display functions of the pixels in all the display areas are closed until the next time the scanning driving signal comes.
In some embodiments, as shown in fig. 4, the terminal further includes: an audio output component 310 located at a first position on the periphery of the display screen for outputting an audio signal; the first display area 111 has a predetermined distance with respect to a first position corresponding to the audio output device.
The first position may be disposed outside the first display area and the second display area, or may be disposed within the second display area, i.e., an off-screen audio output component. The first position, however, cannot be located within the first display area because the audio output assembly is disposed within the first display area and may affect or block the sensor from collecting the ambient light signal. Therefore, the first position and the first display area are set to have a preset distance, and mutual interference is reduced.
In some embodiments, the display screen is a rectangular display screen, including: a first vertex and a second vertex forming the same side of the rectangle with the first vertex;
the distance between the audio output component and the first vertex is smaller than the distance between the audio output component and the second vertex;
the distance of the first display area relative to the first vertex is greater than the distance of the first display area relative to the second vertex.
That is to say, the first positions of the first display area corresponding to the audio output assembly are distributed on two sides of the same side direction of the rectangle, and in order to reduce the influence of the shielding of the audio output assembly on the ambient light on the acquisition precision of the sensor, the positions of the audio output assembly and the sensor, that is, the positions of the first display area, can be symmetrically arranged, and a proper distance is set between the positions. When the terminal is a mobile phone, the audio output assembly and the sensor can be arranged at the position, close to the edge of the screen, of the upper part of the display screen of the mobile phone, so that a user can listen to audio when the mobile phone is close to ears conveniently; meanwhile, the sensor is convenient to collect the ambient light brightness and is not easy to be influenced by the hand operation of a user.
The audio output component can be a handset of a mobile phone or a tablet computer and the like.
An embodiment of the present application further provides a method for controlling a display parameter, as shown in fig. 5, the method includes:
step 101, in a time period when a pulse value for pulse power supply in a Pulse Width Modulation (PWM) dimming mode is zero in a first display area of a display screen, triggering a sensor to acquire ambient light information through gaps among pixels of the first display area;
and 102, controlling display parameters of the first display area and the second display area according to the ambient light information.
The ambient light information includes ambient light brightness, and the display parameter includes display brightness. The following description will be made by taking luminance as an example.
Because the sensor is located first display area below, when first display area shows the luminescence, can influence the sensor and gather the ambient light brightness. Therefore, in this case, the first display region is displayed in the PWM dimming mode in which the pixels of the first display region emit light with a high frequency change and the pixels do not emit light when the pulse power is zero. At the moment, the sensor can acquire the ambient light brightness through gaps among the pixels of the first display area, so that the influence of self-luminescence of the pixels is reduced, and the accuracy of acquiring the ambient light brightness by the sensor is improved.
In some embodiments, the controlling the display parameters of the first display area and the second display area according to the ambient light information includes: driving a first display area to display in a PWM dimming mode according to the ambient light information; and driving the second display area to display in a dimming mode other than the PWM dimming mode according to the ambient light information.
Because the required display brightness is different under different ambient light brightness, when the sensor collects the ambient light brightness, the display can drive the first display area and the second display area respectively according to the ambient light brightness for displaying.
And for the first display area, driving the first display area in a PWM dimming mode so as to enable the sensor to continuously acquire the ambient light brightness. For the second display area, in order to ensure a better display effect, other dimming modes than the PWM dimming mode may be adopted, and may be set according to the requirements in practical applications.
In some embodiments, the driving the second display region to display based on the dimming mode other than the PWM dimming mode includes: and driving the second display area to display based on the direct current dimming mode.
In the direct current dimming mode, the opening degree of the control switch is adjusted by controlling the magnitude of the driving voltage of the pixel, so that the display brightness of the pixel is adjusted. In this mode, the display brightness of the pixels is slowly changed, and high-frequency flicker is not generated, so that better image quality effect can be provided, and the requirement of eye protection is facilitated. Since the second display area covers most of the display screen, the second display area is displayed in the dc dimming mode.
In the embodiment of the disclosure, the measurement accuracy of the light sensor is improved by changing the adjustment mode of the display brightness of the display screen area above the light sensor under the screen. Maintaining the DC dimming mode unchanged in the normal display area of the display screen, namely controlling the display content and adjusting the brightness by controlling the current flowing through the light-emitting device; in the display screen area above the light sensor, a PWM dimming mode is used, namely, when the brightness is displayed and adjusted, the current flowing through the light-emitting device is kept unchanged, the light-emitting current path is switched at a certain frequency and duty ratio, and the visual brightness adjustment is realized by utilizing the visual persistence effect of human eyes. The light sensor can perform ambient light measurement in the PWM dimming mode by utilizing the display brightness of the corresponding area of the display screen to be 0, namely, in the time period of turning off the display screen, so that the interference of the content of the display screen is eliminated, and the measurement accuracy of the sensor under low ambient illumination is improved.
Fig. 6 is a schematic diagram of a composition structure of a display panel having an under-panel light sensor, as shown in fig. 6, a pixel array covers an upper layer of the sensor 120, pixels in the PWM dimming region 111 adopt a PWM dimming mode, and other regions 112 adopt a DC dimming mode. The size of the PWM dimming area 111, that is, the number of pixels covered by the PWM dimming area 111, may be determined according to parameters such as the size and the angle of view of the light sensor. After the size of the PWM dimming region 111 is determined according to the parameters of the light sensor, the display screen is set according to the brightness adjustment modes of different regions.
Two sides of the display Array of the OLED display panel are provided with a Gate On Array (GOA) circuit for providing a scanning signal and a brightness control signal to control the Gate of the scanning switch and the brightness switch in the driving circuit of each pixel. Here, the above scheme is implemented by adjusting the driving mode of the GOA circuit.
Taking a commonly-used HD (High Definition) display screen as an example, the resolution is 1280 × 720, that is, a pixel matrix of 1280 × 720 is provided, the number of pixel lines 10 is 1280, and 1280 GOA units are required to control 1280 rows of pixels respectively. Fig. 7 is a schematic diagram of the distribution structure of the GOAs of the HD display panel, in which the driving unit 11, or Gate unit and Reset unit 12, or Reset unit, for the scan signals at both sides of each row in the diagram drives the pixels of the corresponding row from both sides to provide the scan signals and the Reset signals. For some OLED products, a single-side driving method may also be adopted, where each row of pixels has a driving unit 11 and a reset unit 12 for scanning signals, and they are distributed on two sides of the display screen in a staggered manner or all distributed on the same side of the display screen. For the display panel in fig. 7, each row of pixels further has a control unit Em correspondingly and staggeredly distributed on two sides of the display panel for providing the brightness control signal to control the brightness of the pixels.
In the embodiment of the present application, after the PWM dimming area 111 in fig. 6 is determined, the brightness control signal for controlling the brightness switch of each pixel within the PWM dimming area 111 is disconnected from the brightness control unit Em, a control unit is disposed outside the non-display area, for example, the GOA area, of the OLED display screen, and the control electrode of the brightness switch of each pixel within the PWM dimming area 111 is connected to the brightness control unit Em, as shown in fig. 8. The newly added control unit 130 performs dimming on the PWM dimming region 111 by providing the PWM signal, for example, if a part of pixels in the 1279 th row in the figure belong to the PWM dimming region 111, the part of pixels is disconnected from the original brightness control unit Em and is reconnected to the control unit 130, and the brightness of the part of pixels is controlled by the control unit 130 alone, while the brightness switches of other regions are still connected to the original brightness control unit Em and continue to adopt DC dimming. The circuit of a typical brightness control unit Em has a 10T3C structure, i.e. it is composed of 10 transistors and 3 capacitors, while the circuit of the control unit connected to the PWM dimming region 111 can have an nTmC structure, where n and m can be any positive integers, and are set according to the actual dimming function requirement and the requirement of the occupied space.
Therefore, the PWM dimming mode can be adopted in partial areas of the display screen, the DC dimming mode is adopted in other areas, the screen display effect is guaranteed, the low power consumption requirement is met, and meanwhile the accurate measurement result can be provided under the condition that the ambient light intensity of the light sensor is low under the screen.
An embodiment of the present application further provides a control device for displaying parameters, as shown in fig. 9, the control device 900 includes:
the sensor module 901 is configured to acquire ambient light information through gaps between pixels of a first display region in a time period when a pulse value for performing pulse power supply in a Pulse Width Modulation (PWM) dimming mode on the first display region of a display screen is zero, where the display screen further includes a second display region;
a control module 902, configured to control display parameters of the first display area and the second display area according to the ambient light information.
In some embodiments, as shown in the control device 1000 in fig. 10, the control module 902 includes:
the first driving submodule 911 is configured to drive the first display area to display in the PWM dimming mode according to the ambient light information;
and a second driving sub-module 912, configured to drive the second display area to display in a dimming mode other than the PWM dimming mode according to the ambient light information.
In some embodiments, the second driving sub-module is specifically configured to drive the second display area to display based on a dc dimming mode.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 11 is a block diagram illustrating a control apparatus 1100 for displaying parameters according to an exemplary embodiment. For example, the apparatus 1100 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a gaming console, a tablet device, a medical device, an exercise device, a personal digital assistant, and so forth.
Referring to fig. 11, apparatus 1100 may include one or more of the following components: processing component 1101, memory 1102, power component 1103, multimedia component 1104, audio component 1105, input/output (I/O) interface 1106, sensor component 1107, and communications component 1108.
The memory 1102 is used to store executable instructions that can be executed on the processor 1110; wherein,
the processor 1110 is configured to execute the executable instructions, and the executable instructions perform the steps of the method for controlling the display parameters provided in any of the above method embodiments.
The processing component 1101 generally controls the overall operation of the device 1100, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 1101 may include one or more processors 1110 to execute instructions to perform all or part of the steps of the methods described above. Further, the processing component 1101 may also include one or more modules that facilitate interaction between the processing component 1101 and other components. For example, the processing component 1101 can include a multimedia module to facilitate interaction between the multimedia component 1104 and the processing component 1101.
The memory 1102 is configured to store various types of data to support operation at the device 1100. Examples of such data include instructions for any application or method operating on device 1100, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1102 may be implemented by any type or combination of volatile or non-volatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.
The power supply component 1103 provides power to the various components of the device 1100. The power supply component 1103 may include: a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the device 1100.
The multimedia component 1104 includes a screen that provides an output interface between the device 1100 and a user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 1104 includes a front facing camera and/or a rear facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 1100 is in an operating mode, such as a shooting mode or a video mode. Each front camera and/or rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
Audio component 1105 is configured to output and/or input audio signals. For example, audio component 1105 may include a Microphone (MIC) configured to receive external audio signals when apparatus 1100 is in an operational mode, such as a call mode, recording mode, and voice recognition mode. The received audio signals may further be stored in memory 1110 or transmitted via communications component 1108. In some embodiments, audio component 1105 further includes a speaker for outputting audio signals.
The I/O interface 1106 provides an interface between the processing component 1101 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.
Sensor component 1107 includes one or more sensors to provide various aspects of state estimation for device 1100. For example, sensor component 1107 may detect the open/closed state of device 1100, the relative positioning of components such as a display and keypad of device 1100, sensor component 1107 may also detect a change in the position of device 1100 or a component of device 1100, the presence or absence of user contact with device 1100, orientation or acceleration/deceleration of device 1100, and a change in the temperature of device 1100. Sensor assembly 1107 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. Sensor assembly 1107 may also include a photosensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor component 1107 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 1108 is configured to facilitate communications between the apparatus 1100 and other apparatuses in a wired or wireless manner. The apparatus 1100 may access a wireless network based on a communication standard, such as WiFi, 2G, or 3G, or a combination thereof. In an exemplary embodiment, the communication component 1108 receives a broadcast signal or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1108 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, or other technologies.
In an exemplary embodiment, the apparatus 1100 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.
In an exemplary embodiment, a non-transitory computer readable storage medium comprising instructions, such as the memory 1102 comprising instructions, executable by the processor 1110 of the apparatus 1100 to perform the method described above is also provided. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.
A non-transitory computer readable storage medium, wherein instructions of the storage medium, when executed by a processor of a terminal, enable the terminal to perform the control method of display parameters in any of the above embodiments. In one embodiment, the method comprises:
in a time period when a pulse value of pulse power supply to the first display area in a Pulse Width Modulation (PWM) dimming mode is zero, the sensor collects ambient light information through gaps among pixels of the first display area;
and controlling display parameters of the first display area and the second display area according to the ambient light information.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (14)

1. A terminal, comprising:
the display screen at least comprises a first display area and a second display area, wherein the first display area is provided with a Pulse Width Modulation (PWM) dimming mode;
the sensor is positioned below the first display area and used for acquiring ambient light information through gaps among pixels of the first display area in a time period when a pulse value of the first display area for pulse power supply based on the PWM dimming mode is zero;
and the controller is connected with the sensor and used for controlling the display parameters of the first display area and the second display area based on the ambient light information acquired by the sensor.
2. The terminal of claim 1, wherein the display further comprises:
the first driving assembly is positioned at the periphery of the second display area adjacent to the first display area, is connected with the first display area and is used for driving the first display area to display based on the PWM dimming mode;
and the second driving component is positioned at the periphery of the second display area, is connected with the second display area and is used for driving the second display area to display based on the dimming mode except the PWM dimming mode.
3. The terminal of claim 2, wherein the second driving component is configured to drive the second display region to display based on a dc dimming mode.
4. The terminal according to claim 1, wherein the first display area range covers a field angle range of the sensor and covers a range in which the sensor is located; wherein the field angle range is a range covered by the field angle of the sensor on the display screen.
5. The terminal of any of claims 1 to 4, wherein the display further comprises:
the third driving assembly is positioned at the periphery of the second display area, is connected with the first display area and the second display area and is used for providing scanning driving signals; the scanning driving signal is used for starting the display function of the pixels in the first display area and the second display area.
6. A terminal according to claim 5, wherein the third drive component is further configured to provide a reset signal; the reset signal is used for clearing the scanning driving signal.
7. A method for controlling display parameters, the method comprising:
in a time period when a pulse value for pulse power supply of a first display area of a display screen in a Pulse Width Modulation (PWM) dimming mode is zero, triggering a sensor to acquire ambient light information through gaps among pixels of the first display area, wherein the display screen further comprises a second display area;
and controlling display parameters of the first display area and the second display area according to the ambient light information.
8. The control method according to claim 7, wherein the controlling the display parameters of the first display region and the second display region according to the ambient light information comprises:
driving the first display area to display in the PWM dimming mode according to the ambient light information;
and driving the second display area to display in a dimming mode other than the PWM dimming mode according to the ambient light information.
9. The control method according to claim 8, wherein the driving the second display region to display based on the dimming mode other than the PWM dimming mode includes:
and driving the second display area to display based on the direct current dimming mode.
10. A control apparatus for displaying a parameter, the apparatus comprising:
the sensor module is used for acquiring ambient light information through gaps among pixels of a first display area in a time period when a pulse value for pulse power supply of the first display area in a Pulse Width Modulation (PWM) dimming mode is zero, and the display screen further comprises a second display area;
and the control module is used for controlling the display parameters of the first display area and the second display area according to the ambient light information.
11. The control device of claim 10, wherein the control module comprises:
the first driving submodule is used for driving the first display area to display in the PWM dimming mode according to the ambient light information;
and the second driving submodule is used for driving the second display area to display in a dimming mode other than the PWM dimming mode according to the ambient light information.
12. The control device according to claim 11, wherein the second driving sub-module is configured to drive the second display area to display based on a dc dimming mode.
13. A control device for displaying parameters, characterized in that the control device for displaying parameters at least comprises: a processor and a memory for storing executable instructions operable on the processor, wherein:
the processor is configured to execute the executable instructions, and the executable instructions perform the steps of the method for controlling display parameters as provided in any one of the preceding claims 7 to 9.
14. A non-transitory computer-readable storage medium having stored thereon computer-executable instructions that, when executed by a processor, implement the steps in the method for controlling display parameters as provided in any one of claims 7 to 9.
CN201910640219.0A 2019-07-16 2019-07-16 Terminal, display parameter control method and device, and storage medium Pending CN112242119A (en)

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