CN110880291B - Ambient light brightness determination device and method - Google Patents
Ambient light brightness determination device and method Download PDFInfo
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- CN110880291B CN110880291B CN201811040837.3A CN201811040837A CN110880291B CN 110880291 B CN110880291 B CN 110880291B CN 201811040837 A CN201811040837 A CN 201811040837A CN 110880291 B CN110880291 B CN 110880291B
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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]
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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]
- 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
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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
- 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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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The disclosure relates to an ambient light brightness determination device and method, and belongs to the technical field of electronics. The device comprises: the display screen comprises a plurality of pixel points and a voltage storage unit, wherein the pixel points are arranged in an array mode, the pixel points comprise target pixel units located above the brightness sensor, and each target pixel unit corresponds to the voltage storage unit; the voltage storage unit is connected to two ends of the target pixel unit and used for storing a voltage signal of the target pixel unit, and the voltage signal is used for determining the brightness value of the target pixel unit; the driving IC is connected with the voltage storage unit and the main control chip, and the brightness sensor is connected with the main control chip. The present disclosure improves the accuracy of ambient light brightness value determination. The present disclosure provides for determination of ambient light brightness in a scene with a brightness sensor disposed below the display screen.
Description
Technical Field
The present disclosure relates to the field of electronic technologies, and in particular, to an apparatus and a method for determining ambient light brightness.
Background
The full-screen terminal is a terminal with a screen occupying rate close to 100%, and compared with a traditional terminal with a sensor arranged on the forehead of the terminal, the full-screen terminal needs to arrange the sensor at other parts of the terminal, so that the display screen can occupy a larger area on a panel.
In the related art, it is common to dispose a brightness sensor among the sensors below the display screen. The brightness sensor converts the optical signal passing through the display screen into an electric signal, so that the terminal determines the brightness value corresponding to the electric signal according to the electric signal acquired by the brightness sensor. The brightness value corresponding to the electric signal comprises a brightness value of the ambient light and a brightness value of the display screen.
The terminal cannot acquire the brightness value of the display screen, so that the terminal cannot determine the brightness value of the ambient light.
Disclosure of Invention
The present disclosure provides an ambient light brightness determination apparatus and method, which can solve the problem that a terminal in the related art cannot determine a brightness value of ambient light, and the technical scheme is as follows:
according to a first aspect of the present disclosure, there is provided an ambient light brightness determination apparatus, the apparatus comprising:
the display screen comprises a plurality of pixel points and a voltage storage unit, wherein the pixel points are arranged in an array mode, the pixel points comprise target pixel units located above the brightness sensor, and each target pixel unit corresponds to the voltage storage unit;
the voltage storage unit is connected to two ends of the target pixel unit and used for storing a voltage signal of the target pixel unit, and the voltage signal is used for determining the brightness value of the target pixel unit;
the driving IC is connected with the voltage storage unit and the main control chip, and the brightness sensor is connected with the main control chip.
Optionally, the voltage storage unit is configured to transmit the voltage signal to the driving IC;
the driving IC is also used for transmitting the voltage signal to the main control chip;
the main control chip is also used for determining the brightness value of the display screen according to the voltage signal; determining the brightness value of the optical signal according to the electric signal acquired by the brightness sensor; and subtracting the brightness value of the display screen from the brightness value of the optical signal to obtain the brightness value of the ambient light.
Optionally, the voltage storage unit includes: a capacitor, the target pixel cell comprising: a target OLED organic light emitting diode;
one end of the capacitor is connected with the anode of the target OLED, and the other end of the capacitor is connected with the cathode of the target OLED.
Optionally, the display screen includes m target pixel units, each target pixel unit includes a target OLED organic light emitting diode, and the voltage storage unit includes m capacitors;
one end of the ith capacitor is connected with the anode of the ith target OLED, and the other end of the ith capacitor is connected with the cathode of the ith target OLED;
wherein i is a positive integer.
Optionally, the display screen includes m target pixel units, each target pixel unit includes target OLED organic light emitting diodes of n color components, and the voltage storage unit includes n capacitors;
one end of the jth capacitor is simultaneously connected with the anodes of the target OLED organic light emitting diodes corresponding to the m jth color components, and the other end of the jth capacitor is simultaneously connected with the cathodes of the target OLED organic light emitting diodes of the m jth color components;
wherein n is less than m, and j is a positive integer.
Optionally, the apparatus further comprises:
the display screen comprises a flexible material arranged below the display screen, and a brightness sensor is arranged inside the flexible material.
Optionally, the brightness sensor is configured to collect an optical signal transmitted through the display screen, and convert the optical signal into an electrical signal.
Optionally, the brightness sensor is further configured to transmit the electrical signal to the main control chip.
According to a second aspect of the present disclosure, there is provided an ambient light brightness determination method applied to the ambient light brightness determination device according to the first aspect, the method including:
the voltage storage unit stores a voltage signal of the target pixel unit and transmits the voltage signal of the target pixel unit to the driving IC;
the driving IC transmits a voltage signal to the main control chip, wherein the voltage signal is used for determining the brightness value of the target pixel unit;
the brightness sensor converts the collected light signals penetrating through the display screen into electric signals and transmits the electric signals to the main control chip;
and the main control chip determines the brightness value of the ambient light according to the voltage signal and the electric signal.
Optionally, the determining, by the main control chip, the brightness value of the ambient light according to the voltage signal and the electrical signal includes:
the main control chip determines the brightness value of the display screen according to the voltage signal;
the main control chip determines the brightness value of the optical signal according to the electric signal;
the main control chip subtracts the brightness value of the display screen from the brightness value of the optical signal to obtain the brightness value of the environment light.
The technical scheme provided by the disclosure at least comprises the following beneficial effects:
the device comprises a brightness sensor, a driving IC and a main control chip which are arranged below a display screen, wherein the display screen can comprise a plurality of pixel points and voltage storage units which are arranged in an array mode, target pixel units located above the brightness sensor are arranged in the pixel points, and each target pixel unit corresponds to the voltage storage unit. The voltage storage unit is used for transmitting the stored voltage signal of the target pixel unit to the driving IC so that the driving IC can transmit the voltage signal to the main control chip. The main control chip can determine the brightness value of the ambient light according to the voltage signal and the electric signal collected by the brightness sensor. Since the brightness value of the display screen can be determined through the voltage signal stored in each voltage storage unit, the influence of the brightness of the display screen on determining the ambient light is eliminated, and the accuracy of the determined ambient light brightness value is improved.
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
In order to more clearly illustrate the embodiments of the present disclosure, the drawings that are needed to be used in the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a block diagram illustrating an ambient light level determining apparatus provided by an embodiment of the present disclosure;
FIG. 2 shows a schematic view of a luminance sensor disposed below a display screen;
FIG. 3 shows a partial schematic diagram of a pixel drive circuit of a target pixel cell;
FIG. 4 is a diagram illustrating the one-to-one connection of a target pixel cell to a voltage storage cell;
FIG. 5 is a schematic diagram showing the connection of a target pixel cell of the same color component to a corresponding voltage storage unit;
FIG. 6 is a flow chart illustrating a method for determining ambient light level according to an embodiment of the present disclosure;
FIG. 7 is a flow chart illustrating another method for determining ambient light level provided by embodiments of the present disclosure;
fig. 8 shows a block diagram of another ambient light level determination apparatus provided by the embodiment of the present disclosure.
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.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more clear, the present disclosure will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments, which can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort, shall fall within the scope of protection of the present disclosure.
Fig. 1 is a block diagram illustrating an ambient light brightness determination apparatus provided by an embodiment of the present disclosure, where the apparatus may be a mobile device such as a smart phone or a tablet computer, and a display screen of the mobile device may be an OLED display screen. As shown in fig. 1, the apparatus includes:
the display device may include a luminance sensor 120, a driving IC 130(Integrated Circuit) 130, and a main control chip 140 disposed below the display screen 110, the display screen 110 may include a plurality of pixels 111 and a voltage storage unit 002 arranged in an array, the plurality of pixels 111 may include a target pixel unit 001 located above the luminance sensor 120, and each target pixel unit 001 corresponds to the voltage storage unit 002.
In the embodiment of the disclosure, the display screen 110 may be an OLED (Organic Light-Emitting Diode) display screen, an AMOLED (Active-matrix Organic Light-Emitting Diode) display screen, or a micro OLED (micro Organic Light-Emitting Diode) display screen.
Fig. 2 shows a schematic view of a luminance sensor arranged below a display screen. As shown in fig. 2, a layer of flexible material 003 is disposed below the display screen 110, and the luminance sensor 120 may be disposed in the flexible material 003 by digging a hole in the flexible material 003. By way of example, the flexible material may be a stiff cotton or other flexible material that may serve the same purpose. The voltage storage unit 002 in the display screen 110 may be disposed diagonally above the luminance sensor 120.
In the embodiment of the present disclosure, each pixel point includes a plurality of pixel units, for example, if the pixel point may include 3 pixel units, the 3 pixel units may be a red pixel unit, a blue pixel unit, and a green pixel unit. If the pixel point may also include 4 pixel units, the 4 pixel units may be a red pixel unit, a blue pixel unit, a green pixel unit, and a black pixel unit, or the 4 pixel units may also be a red pixel unit, a blue pixel unit, a green pixel unit, and a yellow pixel unit.
The voltage storage unit 002 is connected to both ends of the target pixel unit 001, and the voltage storage unit 002 is used for storing a voltage signal of the target pixel unit 001, and the voltage signal is used for determining the brightness value of the target pixel unit 001.
In the embodiment of the present disclosure, the luminance value of the target pixel unit 001 is determined by the voltage signal of the target pixel unit 001 stored by the voltage storage unit 002, thereby determining the luminance value of the display screen 110.
As shown in fig. 1, the driving IC 130 is connected to the voltage storage unit 002 and the main control chip 140, and the luminance sensor 120 is connected to the main control chip 140.
Optionally, the voltage storage unit 002 is used for transmitting the voltage signal to the driving IC 130.
In the embodiment of the present disclosure, the voltage storage unit 002 may transmit the voltage signal to the driving IC 130 every a first preset time period, or may transmit the voltage signal to the driving IC 130 in real time, which is not limited in the embodiment of the present disclosure.
The driver IC 130 is also used to transmit the voltage signal to the main control chip 140.
In the embodiment of the present disclosure, the voltage storage unit 002 may transmit the stored voltage signal of the target pixel unit 001 to the driving IC 130, so that the driving IC 130 transmits the voltage signal to the main control chip 140. In another alternative implementation, voltage storage unit 002 may be coupled to main control chip 140, and voltage storage unit 002 may transmit the voltage signal directly to main control chip 140.
And a brightness sensor 120 for collecting the light signal transmitted through the display screen 110 and converting the light signal into an electrical signal.
The brightness sensor 120 may collect the optical signal passing through the display screen 110 every second preset time period, and may also collect the optical signal passing through the display screen 110 in real time, which is not limited in this disclosure. The first preset time length and the second preset time length may be the same or different.
The brightness sensor 120 is also used for transmitting the electrical signal to the main control chip 140.
The main control chip 140 is further configured to determine a brightness value of the display screen 110 according to the voltage signal. The brightness value of the optical signal is determined from the electrical signal collected by the brightness sensor 120. The brightness value of the display screen 110 is subtracted from the brightness value of the light signal to obtain the brightness value of the ambient light.
In the embodiment of the disclosure, after the driving IC 130 transmits the voltage signal to the main control chip 140 and the brightness sensor 120 transmits the electrical signal to the main control chip 140, the main control chip 140 may determine the brightness value of the display screen 110 according to the voltage signal and determine the brightness value of the light signal transmitted through the display screen 110 according to the electrical signal collected by the brightness sensor 120, where the brightness value of the light signal includes the brightness value of the ambient light and the brightness value of the display screen 110. The main control chip 140 can use the brightness value of the optical signal to subtract the brightness value of the display screen 110, so as to obtain the brightness value of the ambient light.
Fig. 3 shows a partial schematic diagram of a pixel driving circuit of a target pixel unit, other components of which are not shown in fig. 3. As shown in fig. 3, the voltage storage unit 002 may include: a capacitor C0. The target pixel cell 001 may include: target OLED D0. One end of the capacitor C0 is connected to the anode of the target OLED D0, and the other end of the capacitor C0 is connected to the cathode of the target OLED D0.
As shown in fig. 3, the partial driving circuit of the target pixel unit may further include a DTFT (Drive thin film Transistor), a switching Transistor T1, and a switching Transistor T2. A gate of the DTFT is connected to the signal line S1, a source of the DTFT is connected to the driving IC 130, and a drain of the DTFT is connected to a source of the switching transistor T2. The gate of the switching transistor T2 is connected to the signal line S2, and the drain of the switching transistor T2 is connected to the anode of the target OLED D0. The gate of the switching transistor T1 is connected to the signal line S3, the source of the switching transistor T1 is connected to the gate of the DTFT, and the drain of the switching transistor T1 is connected to the drain of the DTFT. One end of the capacitor C0 is connected to the anode of the target OLED D0, and the other end of the capacitor C0 is connected to ELVSS. The DTFT may be turned on when the control signal output from the signal line S1 is at an active level, receive a voltage signal transmitted from the driving IC 130 through the source, and transmit the voltage signal to the switching transistor T2 through the drain. The switching transistor T2 is turned on when the control signal outputted from the signal line S2 is at an active level, receives the voltage signal transmitted from the drain of the DTFT through the source, and transmits the voltage signal to the target OLED D0 through the drain, thereby controlling the target OLED D0 to emit light. The DTFT, the switching transistor T1, and the switching transistor T2 may be N-type transistors or P-type transistors. When an N-type transistor is used, the active level may be high. When a P-type transistor, the active level may be a low level. The DTFT, the switching transistor T1, and the switching transistor T2 exemplarily shown in fig. 3 are all N-type transistors, and the active level is a high level.
In the embodiment of the present disclosure, the voltage storage unit 001 may be disposed in various ways. In an alternative implementation, each target pixel cell corresponds to a respective voltage storage unit, that is, each target OLED D0 corresponds to a capacitor C0. Fig. 4 is a schematic diagram showing the one-to-one connection of the target pixel unit and the voltage storage unit. As shown in fig. 4, the display screen 110 may include m target pixel cells 001, each target pixel cell 001 may include a target OLED D0, and the voltage storage unit 002 may include m capacitors C0.
One end of the ith capacitor C0 is connected to the anode of the ith target OLED D0, and the other end of the ith capacitor C0 is connected to the cathode of the ith target OLED D0. Wherein i is a positive integer.
Illustratively, if m is 6, i is 1. As shown in fig. 4, the display screen 110 includes 6 target pixel units 001, a luminance sensor (not shown in fig. 4) is disposed below each of the 6 target pixel units 001, each target pixel unit 001 may include a target OLED D0, and the voltage storage unit 002 may include 6 capacitors C0. Taking the first row 1 st capacitor C0 as an example, one end of the 1 st capacitor C0 is connected to the anode of the 1 st target OLED D0, and the other end of the 1 st capacitor C0 is connected to the cathode of the 1 st target OLED D0.
In another alternative implementation, the target pixel units of the same color component may be connected through a voltage storage unit, that is, the target OLEDs of the same color component may be connected through a capacitor. Fig. 5 shows a schematic diagram of the connection of the target pixel cell of the same color component with the corresponding voltage storage unit. As shown in fig. 5, the display screen 110 may include m target pixel cells 001, each target pixel cell 001 may include n color-component target OLEDs D0, and the voltage storage unit may include n capacitors C0.
One end of the jth capacitor C0 is simultaneously connected to the anodes of the m target OLEDs D0 corresponding to the jth color component, and the other end of the jth capacitor C0 is simultaneously connected to the cathodes of the m target OLEDs D0 corresponding to the jth color component. Wherein n is less than m, and j is a positive integer.
For example, n may be 3 or 4. Each target pixel cell 001 may include a target OLED of a red component, a target OLED of a blue component, and a target OLED of a green component. It may also be a target OLED comprising a red component, a blue component, a green component and a yellow component. Or may also include a red component target OLED, a blue component target OLED, a green component target OLED, and a black component target OLED. The embodiments of the present disclosure do not limit this.
Assuming that j is 1, m is 6, n is 3, the 1 st color component is red, the 2 nd color component is blue, and the 3 rd color component is green, one end of the 1 st capacitor C0 is simultaneously connected to the anodes of the 3 1 st color components corresponding to the target OLED D0, and the other end of the 1 st capacitor C0 is simultaneously connected to the cathodes of the 3 1 st color components corresponding to the target OLED D0.
Suppose m is 6 and n is 3. As shown in fig. 5, the display screen 110 includes 6 target pixel units 001, and the 6 target pixel units 001 include the target OLED D0 of three color components in total. The row 1 target pixel unit 001 is a target OLED of a red component, the row 3 target pixel unit 001 is a target OLED of a green component, and the row 1 target pixel unit 001 is a target OLED of a blue component. As shown in fig. 5, one end of the 1 st capacitor C0 is connected to the anode of the target OLED D0 of the first row red component, and the other end of the 1 st capacitor C0 is connected to the cathode of the target OLED D0 of the first row red component. One end of the 2 nd capacitor C0 is connected to the anode of the target OLED D0 of the second row blue component, and the other end of the 2 nd capacitor C0 is connected to the cathode of the target OLED D0 of the second row blue component. One end of the 3 rd capacitor C0 is connected to the anode of the target OLED D0 of the third row green component, and the other end of the 3 rd capacitor C0 is connected to the cathode of the target OLED D0 of the third row green component. Namely, the target OLED with the same color component is connected with the same capacitor, and the number of the capacitors can be reduced by the method, so that the cost is reduced.
To sum up, the ambient light brightness determination apparatus provided by the embodiment of the present disclosure includes a brightness sensor, a driving IC, and a main control chip disposed below a display screen, where the display screen may include a plurality of pixel points and a voltage storage unit arranged in an array, the plurality of pixel points include a target pixel unit located above the brightness sensor, and each target pixel unit corresponds to the voltage storage unit. The voltage storage unit is used for transmitting the stored voltage signal of the target pixel unit to the driving IC so that the driving IC can transmit the voltage signal to the main control chip. The main control chip can determine the brightness value of the ambient light according to the voltage signal and the electric signal collected by the brightness sensor. Since the brightness value of the display screen can be determined through the voltage signal stored in each voltage storage unit, the influence of the brightness of the display screen on determining the ambient light is eliminated, and the accuracy of the determined ambient light brightness value is improved.
An embodiment of the present disclosure provides an ambient light brightness determination method, which is applied to the ambient light brightness determination device shown in fig. 1, and as shown in fig. 6, the method includes:
in step 301, the voltage storage unit stores a voltage signal of the target pixel unit and transmits the voltage signal of the target pixel unit to the driving IC.
For example, the voltage storage unit may be a capacitor. The target pixel cell may be a target OLED. The brightness value of the display screen can be determined by the voltage signal stored in each voltage storage unit.
In the embodiment of the present disclosure, the voltage storage unit 002 may transmit the stored voltage signal of the target pixel unit 001 to the driving IC 130, so that the driving IC 130 transmits the voltage signal to the main control chip 140. In another alternative implementation, voltage storage unit 002 may be coupled to main control chip 140, and voltage storage unit 002 may transmit the voltage signal directly to main control chip 140.
In step 302, the driving IC transmits a voltage signal for determining a luminance value of the target pixel unit to the main control chip.
In step 303, the brightness sensor converts the collected light signal transmitted through the display screen into an electrical signal and transmits the electrical signal to the main control chip.
The brightness sensor can collect the optical signal penetrating through the display screen at intervals of second preset time, also can collect the optical signal penetrating through the display screen in real time, and converts the optical signal into an electric signal to be transmitted to the main control chip.
In step 304, the main control chip determines the ambient light brightness value according to the voltage signal and the electrical signal.
The brightness values corresponding to the electrical signals comprise the brightness value of the ambient light and the brightness value of the display screen.
To sum up, in the method for determining ambient light brightness provided by the embodiment of the present disclosure, the voltage storage unit transmits the stored voltage signal of the target pixel unit to the driving IC, so that the driving IC transmits the voltage signal to the main control chip, and the main control chip determines the ambient light brightness value according to the voltage signal and the electric signal, which is collected by the brightness sensor and penetrates through the display screen. The brightness value of the display screen is determined through the voltage signals stored in the voltage storage unit, the influence of the brightness of the display screen on determining the ambient light is eliminated, and the accuracy of the determined ambient light is improved.
The embodiment of the present disclosure provides another ambient light brightness determination method, which is applied to the ambient light brightness determination device shown in fig. 1, and as shown in fig. 7, the method includes:
in step 401, the voltage storage unit stores a voltage signal of the target pixel unit and transmits the voltage signal of the target pixel unit to the driving IC.
Step 301 may be referred to as step 401, and details thereof are not described in this disclosure.
In step 402, the driving IC transmits a voltage signal to the main control chip.
The voltage signal is used to determine the luminance value of the target pixel cell.
Step 402 may refer to step 302, which is not described in detail in this disclosure.
In step 403, the brightness sensor converts the collected light signal transmitted through the display screen into an electrical signal and transmits the electrical signal to the main control chip.
The brightness sensor 120 may collect the light signal transmitted through the display screen every preset time period, or collect the light signal transmitted through the display screen 110 in real time, and convert the light signal into an electrical signal to be transmitted to the main control chip 140.
In step 404, the main control chip determines the brightness value of the display screen according to the voltage signal.
The voltage signal stored in each voltage storage unit 002 corresponds to the voltage signal of the target pixel unit 001 connected to the voltage storage unit 002, and the main control chip 140 can determine the brightness value of the display screen 110 according to the voltage signal transmitted by each voltage storage unit 002.
In step 405, the main control chip determines the brightness value of the optical signal according to the electrical signal.
The main control chip can determine the brightness value corresponding to the light signal transmitted through the display screen according to the electric signal transmitted by the brightness sensor, and the brightness value of the light signal comprises the brightness value of the environment light and the brightness value of the display screen.
In step 406, the main control chip subtracts the brightness value of the display screen from the brightness value of the optical signal to obtain the brightness value of the ambient light.
The main control chip subtracts the brightness value of the display screen from the brightness value of the optical signal to obtain the brightness value of the ambient light, so that the influence of the brightness of the display screen on the determination of the ambient light is eliminated.
It should be noted that, the sequence of the steps of the method for determining ambient light brightness provided in the embodiment of the present disclosure may be appropriately adjusted, and the steps may also be increased or decreased according to the circumstances, and any method that can be easily conceived by a person skilled in the art within the technical scope of the present disclosure is included in the protection scope of the present disclosure, and therefore, the description is omitted.
To sum up, in the method for determining ambient light brightness provided by the embodiment of the present disclosure, the voltage storage unit transmits the stored voltage signal of the target pixel unit to the driving IC, so that the driving IC transmits the voltage signal to the main control chip, and the main control chip determines the ambient light brightness value according to the voltage signal and the electric signal, which is collected by the brightness sensor and penetrates through the display screen. The brightness value of the display screen is determined through the voltage signal stored in the voltage storage unit, the influence of the brightness of the display screen on determining the ambient light is eliminated, and the accuracy of determining the ambient light is improved.
FIG. 8 is a block diagram illustrating an apparatus 800 for determining ambient light level according to an exemplary embodiment. The apparatus 800 includes the components and structures shown in fig. 1. For example, the apparatus 800 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, an exercise device, a personal digital assistant, and the like.
Referring to fig. 8, the apparatus 800 may include one or more of the following components: processing component 802, memory 804, power component 806, multimedia component 808, audio component 810, input/output (I/O) interface 812, sensor component 814, and communication component 816.
The processing component 802 generally controls overall operation of the device 800, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing components 802 may include one or more processors 820 to execute instructions to perform all or a portion of the steps of the methods described above. Further, the processing component 802 can include one or more modules that facilitate interaction between the processing component 802 and other components. For example, the processing component 802 can include a multimedia module to facilitate interaction between the multimedia component 808 and the processing component 802.
The memory 804 is configured to store various types of data to support operations at the apparatus 800. Examples of such data include instructions for any application or method operating on device 800, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 804 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 multimedia component 808 includes a screen that provides an output interface between the device 800 and a user. In some embodiments, the screen may comprise an OLED display screen. 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 808 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 800 is in an operating mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.
The audio component 810 is configured to output and/or input audio signals. For example, the audio component 810 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 800 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 804 or transmitted via the communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.
The I/O interface 812 provides an interface between the processing component 802 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.
The sensor assembly 814 includes one or more sensors for providing various aspects of state assessment for the device 800. For example, the sensor assembly 814 may detect the open/closed status of the device 800, the relative positioning of components, such as a display and keypad of the device 800, the sensor assembly 814 may also detect a change in the position of the device 800 or a component of the device 800, the presence or absence of user contact with the device 800, the orientation or acceleration/deceleration of the device 800, and a change in the temperature of the device 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of a nearby object without any physical contact. The sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 814 may also include a brightness sensor, an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor, the brightness sensor being located from below the display screen.
The communication component 816 is configured to facilitate communications between the apparatus 800 and other devices in a wired or wireless manner. The device 800 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 816 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 816 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, and other technologies.
In an example embodiment, the apparatus 800 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.
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.
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 application 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 (9)
1. An ambient light level determining apparatus, the apparatus comprising:
the display screen comprises a brightness sensor, a driving Integrated Circuit (IC) and a main control chip, wherein the brightness sensor, the driving Integrated Circuit (IC) and the main control chip are arranged below the display screen, the display screen comprises a plurality of pixel points and a voltage storage unit which are arranged in an array mode, the pixel points comprise target pixel units positioned above the brightness sensor, and each target pixel unit corresponds to the voltage storage unit;
the voltage storage unit is connected to two ends of the target pixel unit, and is used for storing a voltage signal of the target pixel unit, and the voltage signal is used for determining the brightness value of the target pixel unit;
the display screen comprises m target pixel units, each target pixel unit comprises target OLED organic light-emitting diodes of n color components, and the voltage storage unit comprises n capacitors;
one end of the jth capacitor is simultaneously connected with the anodes of the target OLED organic light emitting diodes corresponding to the m jth color components, and the other end of the jth capacitor is simultaneously connected with the cathodes of the target OLED organic light emitting diodes corresponding to the m jth color components; wherein n is less than m, and j is a positive integer;
the driving integrated circuit IC is connected with the voltage storage unit and the main control chip, and the brightness sensor is connected with the main control chip.
2. The apparatus of claim 1,
the voltage storage unit is used for transmitting the voltage signal to the driving integrated circuit IC;
the driving integrated circuit IC is also used for transmitting the voltage signal to the main control chip;
the main control chip is also used for determining the brightness value of the display screen according to the voltage signal; determining the brightness value of the optical signal according to the electric signal acquired by the brightness sensor; and subtracting the brightness value of the display screen from the brightness value of the optical signal to obtain an ambient light brightness value.
3. The apparatus of claim 1, wherein the voltage storage unit comprises: the capacitor, the target pixel cell comprising: the target OLED organic light emitting diode;
one end of the capacitor is connected with the anode of the target OLED, and the other end of the capacitor is connected with the cathode of the target OLED.
4. The device of claim 3, wherein the display screen comprises m of the target pixel cells, each of the target pixel cells comprises the target OLED, and the voltage storage unit comprises m of the capacitors;
one end of the ith capacitor is connected with the anode of the ith target OLED, and the other end of the ith capacitor is connected with the cathode of the ith target OLED;
wherein i is a positive integer.
5. The apparatus of claim 1, further comprising,
the display screen comprises a flexible material arranged below the display screen, and the brightness sensor is arranged inside the flexible material.
6. The apparatus of claim 2,
the brightness sensor is used for collecting the optical signals penetrating through the display screen and converting the optical signals into the electric signals.
7. The apparatus of claim 2,
the brightness sensor is also used for transmitting the electric signal to the main control chip.
8. An ambient light level determination method applied to the ambient light level determination device according to any one of claims 1 to 7, the method comprising:
the voltage storage unit stores the voltage signal of the target pixel unit and transmits the voltage signal of the target pixel unit to the driving integrated circuit IC;
the driving integrated circuit IC transmits the voltage signal to the main control chip, and the voltage signal is used for determining the brightness value of the target pixel unit; wherein the display screen comprises m target pixel units, each target pixel unit comprises n target OLED organic light emitting diodes of color components, and the voltage storage unit comprises n capacitors; one end of the jth capacitor is simultaneously connected with the anodes of the target OLED organic light emitting diodes corresponding to the m jth color components, and the other end of the jth capacitor is simultaneously connected with the cathodes of the target OLED organic light emitting diodes corresponding to the m jth color components; wherein n is less than m, and j is a positive integer;
the brightness sensor converts the collected light signals penetrating through the display screen into electric signals and transmits the electric signals to the main control chip;
and the main control chip determines the brightness value of the ambient light according to the voltage signal and the electric signal.
9. The method of claim 8, wherein determining an ambient light brightness value from the voltage signal and the electrical signal by the master control chip comprises:
the main control chip determines the brightness value of the display screen according to the voltage signal;
the main control chip determines the brightness value of the optical signal according to the electric signal;
and the main control chip subtracts the brightness value of the display screen from the brightness value of the optical signal to obtain the ambient light brightness value.
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| US9351368B2 (en) * | 2013-03-08 | 2016-05-24 | Ignis Innovation Inc. | Pixel circuits for AMOLED displays |
| KR101888911B1 (en) * | 2015-12-02 | 2018-08-17 | 엘지디스플레이 주식회사 | Display device and printed circuit board for supplying voltage to the display device |
| CN106486064A (en) * | 2016-12-28 | 2017-03-08 | 武汉华星光电技术有限公司 | OLED drive and OLED display |
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