CN113920925B - Display screen brightness adjustment method, display, device and readable storage medium - Google Patents
Display screen brightness adjustment method, display, device and readable storage medium Download PDFInfo
- Publication number
- CN113920925B CN113920925B CN202111221708.6A CN202111221708A CN113920925B CN 113920925 B CN113920925 B CN 113920925B CN 202111221708 A CN202111221708 A CN 202111221708A CN 113920925 B CN113920925 B CN 113920925B
- Authority
- CN
- China
- Prior art keywords
- brightness
- modulation signal
- pulse modulation
- signal
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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]
-
- 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
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention discloses a brightness adjustment method of a display screen, a display, a device and a readable storage medium, wherein the method comprises the following steps: acquiring the ambient light brightness acquired by an ambient light sensor; acquiring a first pulse modulation signal generated by a signal generator; calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness; and adjusting the current backlight brightness of the display screen according to the second pulse modulation signal. The invention can solve the technical problems of unfavorable peep-proof display or inapplicability to special scenes such as darkroom or outdoor and the like in the prior peep-proof technology.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a method for adjusting brightness of a display screen, a display, a device, and a readable storage medium.
Background
Currently, more and more users use electronic devices such as computers and notebook computers to handle daily life and work. The use scenario of the electronic device is not a closed space, such as a public place. When a user is browsing or editing some important information, such as private or confidential information, it is undesirable for the important information to be peeped by others. Therefore, a display screen peep-proof technology needs to be proposed.
In the existing peep-proof technology, switching of the electronic equipment from a share (share) mode to a privacy (privacy) mode is supported, so that the peep-proof requirement of the electronic equipment is met. The method comprises the following two embodiments:
in the first embodiment, after the display screen is switched to the peep-proof mode, the brightness of the display screen is kept when the sharing mode is switched, but the brightness value is usually higher, which is not beneficial to peep-proof display.
In a second embodiment, after switching to the privacy mode, the device is fixed at a lower preset brightness. However, in practice it has been found that this solution, while advantageous for privacy displays, is not suitable for applications in special situations such as darkroom or outdoors.
Disclosure of Invention
The embodiment of the invention solves the technical problems that the prior peep-proof technology is unfavorable for peep-proof display or is not suitable for special scenes such as darkrooms or outdoors by providing the brightness adjusting method, the display, the device and the readable storage medium of the display screen.
In one aspect, the present invention provides a method for adjusting brightness of a display screen according to an embodiment of the present invention, the method including:
acquiring the ambient light brightness acquired by an ambient light sensor;
acquiring a first pulse modulation signal generated by a signal generator, wherein the first pulse modulation signal is used for representing the current backlight brightness of a display screen;
Calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness;
and adjusting the current backlight brightness of the display screen according to the second pulse modulation signal.
Optionally, when there is an occlusion of the ambient light sensor, the calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light level includes:
performing compensation processing on the ambient light brightness according to a pre-stored brightness compensation coefficient to obtain real brightness;
calculating the second pulse modulation signal according to the first pulse modulation signal and the real brightness;
the brightness compensation coefficient is a ratio between the brightness of a light source of a preset standard light source and the current brightness acquired by the ambient light sensor, and the current brightness is the brightness acquired when the ambient light sensor is irradiated by the preset standard light source.
Optionally, the calculating the second pulse modulation signal according to the first pulse modulation signal and the real brightness comprises:
calculating the duty ratio of the second pulse modulation signal according to the duty ratio of the first pulse modulation signal and the real brightness;
The adjusting the current backlight brightness of the display screen according to the second pulse modulation signal includes:
and adjusting the current backlight brightness of the display screen according to the duty ratio of the second pulse modulation signal.
Optionally, the calculating the duty ratio of the second pulse modulation signal according to the duty ratio of the first pulse modulation signal and the real brightness comprises:
according to the duty ratio of the first pulse modulation signal and the real brightness, inquiring a corresponding matching duty ratio from a preset brightness parameter mapping table to serve as the duty ratio of the second pulse modulation signal;
the brightness parameter mapping table comprises a mapping relation among an input signal duty ratio, a brightness value and an output signal duty ratio, wherein the mapping relation is in one-to-one correspondence among the input signal duty ratio, the brightness value and the output signal duty ratio.
Optionally, the acquiring the ambient light level acquired by the ambient light sensor includes:
and when the display screen is detected to be in a preset peep-proof mode, acquiring the ambient light brightness acquired by the ambient light sensor.
Optionally, the calculating the second pulse modulation signal according to the first pulse modulation signal and the real brightness comprises:
Calculating the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real brightness;
the adjusting the current backlight brightness of the display screen according to the second pulse modulation signal includes:
and adjusting the current backlight brightness of the display screen according to the pulse amplitude of the second pulse modulation signal.
Optionally, the calculating the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real brightness comprises:
inquiring a corresponding matching amplitude value from a preset brightness amplitude value mapping table according to the pulse amplitude value of the first pulse modulation signal and the real brightness, and taking the corresponding matching amplitude value as the pulse amplitude value of the second pulse modulation signal;
the brightness amplitude mapping table comprises mapping relations among input signal amplitude values, brightness values and output signal amplitude values, wherein the mapping relations are in one-to-one correspondence among the input signal amplitude values, the brightness values and the output signal amplitude values.
In another aspect, the present invention provides a display according to an embodiment of the present invention, the display including: the system comprises a microprocessor, an ambient light sensor, a signal generator and a display screen, wherein the ambient light sensor, the signal generator and the display screen are respectively connected with the microprocessor through buses, and the microprocessor is used for executing the following steps:
Acquiring the ambient light brightness acquired by the ambient light sensor;
acquiring a first pulse modulation signal generated by the signal generator, wherein the first pulse modulation signal is used for representing the current backlight brightness of the display screen;
calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness;
and adjusting the current backlight brightness of the display screen according to the second pulse modulation signal.
The details not described or not described in the present invention may be referred to the relevant description of the foregoing method embodiments, which is not repeated herein.
In another aspect, the present invention provides a brightness adjustment device for a display screen according to an embodiment of the present invention, where the device includes an obtaining module, a calculating module, and an adjusting module, where:
the acquisition module is used for acquiring the ambient light brightness acquired by the ambient light sensor;
the acquisition module is further used for acquiring a first pulse modulation signal generated by the signal generator, wherein the first pulse modulation signal is used for representing the current backlight brightness of the display screen;
the calculating module is used for calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness;
And the adjusting module is used for adjusting the current backlight brightness of the display screen according to the second pulse modulation signal.
The descriptions or not described in the embodiments of the present invention may be referred to the relevant descriptions in the foregoing method embodiments, which are not repeated herein.
In another aspect, the present invention provides a computer-readable storage medium storing a program that when run on a display performs the brightness adjustment method of a display screen as described above.
One or more technical solutions provided in the embodiments of the present invention at least have the following technical effects or advantages: according to the invention, the ambient light brightness collected by the ambient light sensor and the first pulse modulation signal generated by the signal generator are obtained, so that the second pulse modulation signal is calculated according to the first pulse modulation signal and the ambient light brightness, and finally the current backlight brightness of the display screen is adjusted according to the second pulse modulation signal. In the scheme, the backlight brightness of the display screen can be automatically adjusted according to the ambient light brightness and the input first pulse modulation signal, so that the display screen peep-proof device is suitable for different application environments/scenes, the display screen backlight brightness adjustment accuracy and efficiency can be improved. In addition, the invention can solve the technical problems of unfavorable peeping display or inapplicability to special scenes such as darkrooms or outdoors in the prior peeping prevention technology.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a display provided in the prior art.
Fig. 2 is a schematic structural diagram of another display provided in the prior art.
Fig. 3 is a schematic structural diagram of a display according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of another display according to an embodiment of the present invention.
Fig. 5 is a flowchart of a method for adjusting brightness of a display screen according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a brightness adjusting device of a display screen according to an embodiment of the present invention.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
First, the term "and/or" appearing herein is merely an association relationship describing associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The applicant found in the course of proposing the present invention that: the existing display screen peeping-preventing technology is realized by adopting the following two embodiments.
In a first embodiment, please refer to fig. 1, which shows a schematic diagram of a display provided in a possible prior art. The display shown in fig. 1 includes a central processing unit (central processing unit, CPU) or an embedded controller (embedded controller, EC) 101, a timing control chip (timing controller, T-CON) 102, a waveform module 103, a display (which may also be a display Driver) 104, and a peep-proof unit 105. The CPU/EC 101 generates an input pulse modulation signal (pulse width modulation input, PWMI) for adjusting the backlight brightness of the display screen, and generates an enable signal for adjusting the viewing angle of the display screen corresponding to the privacy unit 105, which may specifically be a base rate interface enable signal (primary rate interface enable, pri_en). The timing control chip 102 is configured to perform timing processing on the pulse modulation signal PWMI to obtain an output pulse modulation signal PWMO for controlling/driving the display screen 104. The waveform module 103 is configured to process the enable signal to obtain a square wave signal for controlling the peep-proof unit 105. The peep-proof unit 105 is configured to adjust a visual angle of a display screen according to the square wave signal (for example, square wave frequency, etc.), so as to support a user to see in the visual angle range, thereby achieving the purpose of displaying peep-proof.
The backlight control of the display screen 104 (specifically the T-CON chip 102 in the drawing) and the control of the privacy unit 105 (specifically the waveform module 103 in the drawing) are two functional modules that operate independently as shown. When the display is switched from the sharing mode to the peep-proof mode, the backlight brightness of the display screen is kept consistent with the brightness of the display screen before the sharing mode is switched. However, the brightness is usually high, which is unfavorable for peep-proof display. When a user uses the display, the system of the display controls the backlight brightness of the display screen to have a plurality of preset brightness levels, and peep-proof effects corresponding to different brightness levels are different.
In a second embodiment, please refer to fig. 2, which shows a schematic diagram of another possible display provided in the prior art. The display as shown in fig. 2 includes: a Central Processing Unit (CPU) or an embedded controller EC201, a microprocessor (micro control unit, MCU) 202, a display (also may be a display Driver LED Driver) 203, and a privacy unit 204. The CPU/EC 201 generates an input pulse modulation signal (pulse width modulation input, PWMI) for adjusting the backlight brightness of the display screen, and generates an enable signal for adjusting the viewing angle of the display screen corresponding to the privacy unit 204, which may specifically be a base rate interface enable signal (primary rate interface enable, pri_en). The MCU202 is configured to generate a corresponding PWMO and square wave signal according to the PWMI and the pri_en. The PWMO is used for controlling or driving the display screen 203 to work, for example, controlling backlight brightness of the display screen 203 according to the PWMO. The square wave signal is used for controlling or adjusting the visual angle of the display screen 203 supported by the peep-proof unit 204, so as to support the user to view in the visual angle range, thereby achieving the purpose of displaying peep-proof.
In this solution, the backlight control of the display 203 and the control of the privacy unit 204 are integrated (in particular the microprocessor 202 in the illustration). When the display is switched from the sharing mode to the peep-proof mode, the backlight brightness of the display screen is fixed at a lower preset brightness, and the peep-proof display effect is facilitated, but the peep-proof effect cannot be achieved for the use of a user in special scenes such as darkrooms or outdoors.
In order to solve the problems, the invention provides a display which has higher peep-proof effect and is applicable to various application scenes. Fig. 3 is a schematic structural diagram of a possible display according to an embodiment of the invention. The display shown in fig. 3 includes an ambient light sensor 301, a signal generator 302, a microprocessor 303, a display 304, and a privacy unit 305. The ambient light sensor 301, the signal generator 302, the display screen 304, and the peep-proof unit 305 are respectively connected to the microprocessor 303, and the connection mode is not limited in the present invention, for example, bus connection.
Optionally, the ambient light sensor 301 (ambient light sensor, ALS) may be connected to the microprocessor 303 via a bus interface including, but not limited to, an integrated circuit bus (inter-integrated circuit, I2C) interface, INT (interface) interface, or other bus interface, among others. The bus interface corresponds to buses that are employed including, but not limited to, data lines (SDA) and control lines (system control line, SCL). In practical applications, the model and type of the ambient light sensor 301 are not limited, and may be determined according to the actual requirements of the system, for example, the ambient light sensor 301 may be a CM32181E ALS chip or the like. The CM32181E ALS chip supports 16-bit (bit) high sensitivity ambient light data acquisition, and its highest energy acquires 2700 nit (nit) ambient light brightness. When the system starts the ambient light sensor 301 to operate, it may transmit the collected 16bit ambient light level to the microprocessor 303 through the I2C interface.
In practical applications, considering that the ambient light sensor 301 may have a shielding condition, the collected ambient light level is attenuated, the microprocessor 303 needs to perform brightness compensation to keep the brightness consistent with the actual brightness of the current environment. The specific implementation is as follows: the present invention may utilize a preset standard light source to illuminate the ambient light sensor 301, and at this time, the ambient light sensor 301 collects the current brightness and transmits the current brightness to the microprocessor 303. The microprocessor 303 compares the current brightness with a target value (i.e. the brightness of the standard light source), and calculates a corresponding brightness compensation coefficient. For example, taking a standard light source with a light source brightness of 200nit and the current brightness of 160nit as an example, the microprocessor 203 may calculate and obtain a brightness compensation coefficient 200/160=1.25.
Accordingly, the present invention writes the brightness compensation coefficients into the microprocessor 303 for storage via an external audio input tool (AUX tool). At this time, the register of the microprocessor 303 is rewritten to the brightness compensation coefficient (e.g., 1.25) multiplied by the ambient light brightness collected by the ambient light sensor 301 to complete brightness calibration (calibration).
The signal generator 302 is configured to generate an operation signal of the display, for example, the first pulse modulation signal PWMI for adjusting the backlight brightness of the display screen 304, the enable signal pri_en for controlling the operation of the peep preventing unit 305, and the like can be generated in the present invention. In practice, the signal generator 302 includes, but is not limited to, a central processing unit CPU, an embedded controller EC, a System On Chip (SOC) chip, or other chip or device for generating a display operation signal.
The microprocessor MCU 303 is configured to collect the first pulse modulation signal PWMI, and process the first pulse modulation signal PWMI to output a second pulse modulation signal PWMO. The second pulse modulation signal PWMO is used to adjust the current backlight brightness of the display screen 304. The present invention is not described in detail herein, and how to obtain the second pulse modulation signal and how to adjust the current backlight brightness of the display screen according to the second pulse modulation signal.
The microprocessor MCU 303 is further configured to collect the enable signal pri_en, and generate a corresponding square wave signal according to the enable signal pri_en. The square wave signal is used to control the operation of the privacy unit 305. For example, the peep-proof unit 305 is configured to control the visual angle of the display screen 304 according to the square wave signal (e.g. square wave frequency) so as to support viewing within the range of the visual angle, thereby achieving the purpose of displaying peep-proof. The detailed description and limitation of the specific implementation of the peep-proof unit 305 are not described herein.
In practical applications, the enable signal pri_en is specifically transmitted to the microprocessor 303 side through a general-purpose input/output (GPIO) interface of the display via an embedded display (embedded display port, eDP) interface of the display. The eDP interface (or eDP PIN) used for the pri_en corresponding transmission may be a PIN To Be Defined (TBD) on the chip, such as PIN24, etc., which is not limited by the present invention.
Optionally, the display may also include a crystal oscillator (not shown). The crystal oscillator is used for providing a clock signal for the display so as to control the working frequency or the working period of the display.
Optionally, the display further comprises a timing control chip (timing controller, T-CON) 306. Fig. 4 is a schematic structural diagram of another possible display according to an embodiment of the invention. The display shown in fig. 4 includes an ambient light sensor 301, a signal generator 302, a microprocessor 303, a display screen 304, a privacy unit 305, and a timing control chip 306. The timing control chip 306 is connected to the signal generator 302 and the microprocessor 303, respectively, and the connection mode is not limited. For example, the signal generator 302 is shown coupled to the timing control chip 306 via an audio input (AUX) interface. The timing control chip 306 is connected with the microprocessor 303 through an I2C interface. The timing control chip 306 is used for synchronously processing timing signals required by the display and outputting control signals to drive the display screen 304 to work. The present invention is not limited to the ambient light sensor 301, the signal generator 302, the microprocessor 303, the display 304 and the peep-proof unit 305 described above with reference to the embodiment of fig. 3.
It should be noted that, the working modes of the display according to the present invention include a sharing mode and a peep-proof mode. When the display is in the sharing mode, the second pulse modulation signal PWMO is the same as the first pulse modulation signal PWMI, for example, the duty ratio (duty) and the amplitude (specifically, the current amplitude, the voltage amplitude, etc.) of the two pulse modulation signals may be the same. At this time, the ambient light sensor 301 and the peep-proof unit 305 are both turned off, i.e. the ambient light sensor 301 and the peep-proof unit 305 are not turned on.
When the display is in the peep-proof mode, the enable signal pri_en output by the system is at a high level, and the microprocessor 303 controls the ambient light sensor 301 to be started, so as to collect the ambient light level (also referred to as detecting ALS data) of the current environment by using the ambient light sensor 301. Further, the microprocessor 303 calculates a corresponding second pulse modulation signal PWMO according to the ambient light level and the first pulse modulation signal PWMI input by the system, so as to adjust the backlight brightness of the display screen 304 according to the second pulse modulation signal, so as to achieve a better peep-proof purpose.
Therefore, when the sharing mode of the display is switched to the peep-proof mode, the present invention needs to control the enable signal pri_en to be at a high level, the microcontroller 303 outputs a square wave signal, and the ambient light sensor 301 is started, i.e. pri_en high, the MCU outputs a square wave signal ON, and ALS ON. On the contrary, when the present invention switches the peep-proof mode of the display to the sharing mode, the enable signal pri_en needs to be controlled to be at a low level, the microcontroller 303 is not allowed to output square wave signals, and the ambient light sensor 301 is turned OFF, i.e. pri_en low, the MCU outputs square wave signals OFF and ALS OFF.
Fig. 5 is a flowchart of a method for adjusting brightness of a display screen according to an embodiment of the present invention. The method shown in fig. 5 is applied to the display shown in fig. 3 or fig. 4, and is particularly used on the microprocessor side of the display, and the method comprises the following implementation steps:
s501, acquiring the ambient light brightness acquired by an ambient light sensor.
The ambient light brightness of the invention is the ambient brightness of the current environment collected by the ambient light sensor. In a specific embodiment, when the display is detected to be in a preset peep-proof mode, the invention can start the ambient light sensor to acquire the current ambient light brightness, so as to acquire the ambient light brightness acquired by the ambient light sensor.
S502, acquiring a first pulse modulation signal generated by a signal generator, wherein the first pulse modulation signal is used for representing the current backlight brightness of a display screen.
The first pulse modulated signal (which may be denoted as PWMI above) is generated by a signal generator for adjusting or characterizing the current backlight brightness of the display screen. It should be noted that the specific implementation sequence of steps S501 and S502 is not limited to the present invention, for example, the present invention may execute step S502 first and then execute step S501. When the present invention first executes step S502, the present invention may acquire the first pulse modulation signal generated by the signal generator when detecting that the display is in the preset peep-proof mode.
S503, calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness.
S504, adjusting the current backlight brightness of the display screen according to the second pulse modulation signal.
Several embodiments in which steps S503 and S504 exist are described below.
In an embodiment, when the ambient light sensor is not blocked, the present invention may directly calculate a second pulse modulation signal (PWMO) according to the first pulse modulation signal (PWMI) and the ambient light level, for example, signal parameters such as a duty cycle, a pulse amplitude, etc. of the second pulse modulation signal. And further, the current backlight brightness of the display screen is adjusted by utilizing signal parameters such as the duty ratio, the pulse amplitude and the like of the second pulse modulation signal. Several possible embodiments of its existence are described below.
In a specific embodiment, the present invention may calculate the duty cycle of the second pulse modulation signal according to the duty cycle of the first pulse modulation signal and the ambient light level.
In a possible implementation manner, the present invention may query, from a preset signal brightness mapping table, a matching duty ratio corresponding to the duty ratio of the first pulse modulation signal and the ambient light brightness according to the duty ratio of the first pulse modulation signal and the ambient light brightness, and further use the matching duty ratio as the duty ratio of the second pulse modulation signal. The signal brightness mapping table is preconfigured by the system and comprises mapping relations among the input signal duty ratio, the brightness value and the output signal duty ratio, wherein the mapping relations are in one-to-one correspondence, namely the input signal duty ratio, the brightness value and the output signal duty ratio are in one-to-one correspondence. In practical applications, the number of the mapping relationships is not limited, that is, the number of the input signal duty ratio, the brightness value and the output signal duty ratio in the signal brightness mapping table is not limited, and is usually a plurality of the input signal duty ratios.
In particular, the present invention may be used to rank (or grade) the ambient light, where the specific range/mode of the ranking is not limited by the present invention. In practical application, the more steps, the better the effect, the more steps (or levels) of the second pulse modulation signal the system matches the output. For example, the present invention may divide the ambient light level into 8 level intervals, which may be denoted as S0 to S7, respectively. The system is also divided into 8 level sections, denoted as L0 to L7, from dark to light according to PWMI backlight brightness adjustment set by the user. Accordingly, the signal brightness map table may be represented as shown in table 1 below.
TABLE 1
| SL | S0 | S1 | S2 | S3 | S4 | S5 | S6 | S7 |
| L0 | SL 00 | SL 10 | SL 20 | SL 30 | SL 40 | SL 50 | SL 60 | SL 70 |
| L1 | SL 01 | SL 11 | SL 21 | SL 31 | SL 41 | SL 51 | SL 61 | SL 71 |
| L2 | SL 02 | SL 12 | SL 22 | SL 32 | SL 42 | SL 52 | SL 62 | SL 72 |
| L3 | SL 03 | SL 13 | SL 23 | SL 33 | SL 43 | SL 53 | SL 63 | SL 73 |
| L4 | SL 04 | SL 14 | SL 24 | SL 34 | SL 44 | SL 54 | SL 64 | SL 74 |
| L5 | SL 05 | SL 15 | SL 25 | SL 35 | SL 45 | SL 55 | SL 65 | SL 75 |
| L6 | SL 06 | SL 16 | SL 26 | SL 36 | SL 46 | SL 56 | SL 66 | SL 76 |
| L7 | SL 07 | SL 17 | SL 27 | SL 37 | SL 47 | SL 57 | SL 67 | SL 77 |
As can be seen from Table 1, the present invention can determine the brightness level interval S to which the ambient light level belongs according to the ambient light i The method comprises the steps of carrying out a first treatment on the surface of the Determining a duty cycle level interval L to which the first pulse modulation signal belongs according to the duty cycle of the first pulse modulation signal j The method comprises the steps of carrying out a first treatment on the surface of the And then according to S i And L j The corresponding matching duty cycle SL is looked up from Table 1 ij . Wherein i and j are positive integers less than or equal to 7.
As another example, take the signal brightness map table as a table 6×11 as shown in the following table 2 as an example. The ambient light brightness in the signal brightness mapping table is divided into 6 level intervals according to actual requirements, and the level intervals are respectively denoted as A0 to A5, and the brightness range corresponding to each level interval is shown in the following table 2. The duty ratio of the first pwm signal PWMI in the signal brightness map is divided into 11 level intervals according to actual requirements, and each level interval is denoted by L0 to L10, and the corresponding duty ratio range of each level interval is shown in table 2 below.
TABLE 2
In table 2 above, the maximum backlight brightness of the display screen supported by the first pulse modulation signal PWMI is 1000nit, that is, the duty ratio of the first pulse modulation signal corresponding to 1000nit is 100%. As can be seen from table 2 above, the duty cycle (duty) of the second pulse modulation signal is equal to the required brightness (i.e. the current required backlight brightness of the display screen) divided by the maximum backlight brightness multiplied by 100%. Accordingly, after the duty ratio of the second pulse modulation signal matched with the ambient light brightness and the duty ratio of the first pulse modulation signal is queried according to the above table 2, the required backlight brightness of the display screen corresponding to the second pulse modulation signal at this time can be calculated according to the deformation formula of the above formula, that is, the required backlight brightness is equal to the duty ratio of the second pulse modulation signal multiplied by the preset maximum backlight brightness, in this example, the maximum backlight brightness is 1000nit. And then the current backlight brightness of the display screen is adjusted according to the calculated required backlight brightness corresponding to the second pulse modulation signal, so that the peep-proof display purpose is achieved.
In another possible implementation manner, the present invention may perform a look-up table (LUT) logic operation on the duty cycle of the first pulse modulation signal and the ambient light level to obtain a corresponding look-up compensation coefficient (may also be referred to as LUT logic operation coefficient). And then the duty ratio of the first pulse modulation signal is adjusted according to the table look-up compensation coefficient so as to obtain the duty ratio of the second pulse modulation signal.
Specifically, the duty ratio of the first pulse modulation signal and the ambient light brightness can be input into the microprocessor MCU to perform LUT logic operation, for example, look-up table compensation coefficients corresponding to the duty ratio and the ambient light brightness are queried from a preset coefficient brightness mapping table. And then the duty ratio of the first pulse modulation signal is adjusted according to the table look-up compensation coefficient so as to obtain the duty ratio of the second pulse modulation signal. Wherein:
the coefficient brightness mapping table is preconfigured by the system and at least comprises a mapping relation among the duty ratio of the first pulse modulation signal, the ambient light brightness and the table look-up compensation coefficient. In practical application, the table look-up compensation coefficient (i.e., LUT logic operation coefficient) is a compensation coefficient with an optimal peep-proof effect obtained by performing test under different environment light brightness and different duty cycle conditions of the first pulse modulation signal. In other words, the table look-up compensation coefficient is a real compensation coefficient obtained according to an actual experimental test. With reference to the foregoing description of the embodiments, the present invention may also actually divide the ambient light brightness and the duty ratio of the first pulse modulation signal. The table lookup compensation coefficient is specifically a compensation coefficient with the best peep-proof effect obtained by actual measurement under the conditions of the classified brightness level intervals of different ambient light brightness and the classified duty cycle level intervals of different duty cycles of the first pulse modulation signals.
In another possible implementation manner, the present invention may call a first mathematical model trained in advance, and calculate the duty cycle of the first pulse modulation signal and the ambient light brightness, so as to output and obtain the duty cycle of the second pulse modulation signal. The first mathematical model is a model which is set by a system in a self-defining way, and can be specifically set according to the actual requirement of the system, and can include, but is not limited to, a convolutional neural network model, a recurrent cyclic neural network model or other deep learning model, and the like.
In another embodiment, the present invention may calculate the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the ambient light level. The pulse amplitude referred to in the present invention may specifically refer to a current amplitude or a voltage amplitude. When the pulse modulation signal is a current signal, the corresponding signal pulse amplitude is the current amplitude; otherwise, when the pulse modulation signal is a voltage signal, the corresponding signal pulse amplitude is the voltage amplitude. Several possible embodiments of its existence are presented below.
In one possible implementation manner, the invention can query the matching amplitude corresponding to the first pulse modulation signal from a preset signal amplitude mapping table according to the pulse amplitude of the first pulse modulation signal and the ambient light brightness, so as to be used as the pulse amplitude of the second pulse modulation signal. The signal amplitude mapping table is preconfigured by the system and can comprise mapping relations among the input signal amplitude, the brightness value and the output signal amplitude, and the mapping relations are in one-to-one correspondence, namely the input signal amplitude, the brightness value and the output signal amplitude are in one-to-one correspondence. In practical applications, the number of the mapping relationships is not limited, that is, the number of each of the input signal amplitude, the brightness value and the output signal amplitude in the signal amplitude mapping table is not limited, and is usually a plurality of the input signal amplitude, the brightness value and the output signal amplitude.
Optionally, the present invention may further perform a step on the ambient light brightness and the pulse amplitude of the first pulse modulation signal, and the specific implementation of the step or the step interval is not limited by the present invention. And, the number of the level intervals of the corresponding steps of the ambient light brightness and the level intervals of the corresponding steps of the pulse amplitude of the first pulse modulation signal may be the same or different, which is not limited by the present invention. Correspondingly, the signal amplitude mapping table specifically comprises mapping relations among an input signal amplitude interval, a brightness value interval and the output signal amplitude. The signal amplitude mapping table may be referred to in the foregoing description, and the present invention is not described in detail herein.
In another possible implementation manner, the present invention may perform a look-up table (LUT) logic operation on the pulse amplitude of the first pulse modulation signal and the ambient light level to obtain a corresponding amplitude compensation coefficient (may also be referred to as an LUT logic operation coefficient). And then the pulse amplitude of the first pulse modulation signal is adjusted according to the amplitude compensation coefficient so as to obtain the pulse amplitude of the second pulse modulation signal.
Optionally, the present invention may further perform a step on the ambient light brightness and the pulse amplitude of the first pulse modulation signal, and the specific implementation of the step or the step interval is not limited by the present invention. Accordingly, the present invention may specifically perform LUT logic operation according to the level interval of the level of the ambient light level, and the level interval of the level of the pulse amplitude of the first pulse modulation signal, which may be correspondingly described with reference to the foregoing embodiments, and the present invention is not described in detail herein.
In another possible implementation manner, the invention may call a pre-trained second mathematical model, and calculate the pulse amplitude of the first pulse modulation signal and the ambient light brightness, so as to output and obtain the pulse amplitude of the second pulse modulation signal. The second mathematical model is a model which is set by system customization, which can be specifically set according to the actual requirement of the system, and can include, but is not limited to, a convolutional neural network model, a recurrent neural network model or other deep learning model, and the like.
In another embodiment, when the ambient light sensor is blocked, the present invention may perform compensation processing on the ambient light brightness according to a pre-stored brightness compensation coefficient to obtain the actual brightness of the current environment. The brightness compensation coefficient is a ratio between the brightness of a light source of a preset standard light source and the current brightness acquired by the ambient light sensor, and the current brightness is the brightness acquired by the ambient light sensor when the ambient light sensor is irradiated by the preset standard light source.
Further, the invention can calculate the second pulse modulation signal according to the first pulse modulation signal and the real brightness. There are several possible embodiments.
In a specific embodiment, the present invention may calculate the duty cycle of the second pulse modulation signal according to the duty cycle of the first pulse modulation signal and the real brightness.
In a possible implementation manner, the invention can query the matching duty ratio corresponding to the first pulse modulation signal from a preset brightness parameter mapping table according to the duty ratio of the first pulse modulation signal and the real brightness, so as to be used as the duty ratio of the second pulse modulation signal. The brightness parameter mapping table is preconfigured by the system and comprises mapping relations among the input signal duty ratio, the brightness value and the output signal duty ratio, and the mapping relations are in one-to-one correspondence, namely the input signal duty ratio, the brightness value and the output signal duty ratio are in one-to-one correspondence. In practical applications, the number of the mapping relationships is not limited, and is usually plural.
Alternatively, the present invention may divide the real brightness and the duty ratio of the first pulse modulation signal, and the specific implementation of the division or the division is not limited. Correspondingly, the brightness parameter mapping table specifically comprises a mapping relation among an input signal duty ratio interval, a brightness value interval and the output signal duty ratio. The brightness parameter mapping table may be correspondingly referred to the description related to the signal brightness mapping table, which is not repeated herein.
In another possible implementation manner, the present invention may perform a look-up table LUT logic operation on the duty cycle of the first pulse modulation signal and the real brightness to obtain a corresponding look-up table compensation coefficient. And then the duty ratio of the first pulse modulation signal is adjusted according to the table look-up compensation coefficient so as to obtain the duty ratio of the second pulse modulation signal. For how to calculate the table look-up compensation coefficient, reference may be made to the description of the LUT logic operation according to the duty cycle of the first pulse modulation signal and the ambient light brightness in the foregoing embodiment, which is not repeated herein.
In another possible implementation manner, the present invention may call a third mathematical model trained in advance, and calculate the duty cycle of the first pulse modulation signal and the real brightness, so as to output and obtain the duty cycle of the second pulse modulation signal. The third mathematical model is a model which is set by system customization, which can be specifically set according to the actual requirement of the system, and can include, but is not limited to, a convolutional neural network model, a recurrent neural network model, other deep learning models, and the like.
In another embodiment, the present invention may calculate the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real brightness. The pulse amplitude referred to in the present invention may specifically refer to a current amplitude or a voltage amplitude.
In a possible implementation manner, the invention can query the matching amplitude corresponding to the first pulse modulation signal from a preset brightness amplitude mapping table according to the pulse amplitude of the first pulse modulation signal and the real brightness, so as to be used as the pulse amplitude of the second pulse modulation signal. The brightness amplitude mapping table is preconfigured by the system and can comprise mapping relations among the input signal amplitude, the brightness value and the output signal amplitude, and the mapping relations are in one-to-one correspondence, namely the input signal amplitude, the brightness value and the output signal amplitude are in one-to-one correspondence. In practical applications, the number of the mapping relationships is not limited, and is usually plural.
Optionally, the present invention may divide the actual brightness and the pulse amplitude of the first pulse modulation signal, and the specific implementation of the division or the division interval of the division is not limited. Correspondingly, the brightness amplitude mapping table specifically comprises mapping relations among an input signal amplitude interval, a brightness value interval and the output signal amplitude. The brightness amplitude mapping table may be correspondingly referred to the description related to the signal amplitude mapping table, which is not repeated herein.
In another possible implementation manner, the present invention may perform a look-up table (LUT) logic operation on the pulse amplitude of the first pulse modulation signal and the real brightness to obtain a corresponding amplitude compensation coefficient (may also be referred to as an LUT logic operation coefficient). And then the pulse amplitude of the first pulse modulation signal is adjusted according to the amplitude compensation coefficient so as to obtain the pulse amplitude of the second pulse modulation signal.
Optionally, the present invention may further perform a step on the actual brightness and the pulse amplitude of the first pulse modulation signal, where the specific implementation of the step or the step interval is not limited by the present invention. Accordingly, the present invention may specifically perform LUT logic operation according to the level interval of the step to which the real light brightness belongs, and the level interval of the step to which the pulse amplitude of the first pulse modulation signal belongs, which may be correspondingly described with reference to the foregoing embodiments, and the present invention is not described in detail herein.
In another possible implementation manner, the present invention may invoke a fourth mathematical model trained in advance, and calculate the pulse amplitude of the first pulse modulation signal and the real brightness, so as to output and obtain the pulse amplitude of the second pulse modulation signal. The fourth mathematical model is a model set by system customization, which can be specifically set according to the actual requirement of the system, and can include, but is not limited to, a convolutional neural network model, a recurrent neural network model, or other deep learning model, etc.
It should be noted that, the first mathematical model, the second mathematical model, the third mathematical model and the fourth mathematical model are all trained by the system in advance, and their corresponding model frames may be the same, for example, they may be neural network models, etc., or they may be different, which is not limited by the present invention.
According to the embodiment of the invention, the ambient light brightness collected by the ambient light sensor and the first pulse modulation signal generated by the signal generator are obtained, so that the second pulse modulation signal is calculated according to the first pulse modulation signal and the ambient light brightness, and finally the current backlight brightness of the display screen is adjusted according to the second pulse modulation signal. In the scheme, the backlight brightness of the display screen can be automatically adjusted according to the ambient light brightness and the input first pulse modulation signal, so that the display screen peep-proof device is suitable for different application environments/scenes, the display screen backlight brightness adjustment accuracy and efficiency can be improved. In addition, the invention can solve the technical problems of unfavorable peeping display or inapplicability to special scenes such as darkrooms or outdoors in the prior peeping prevention technology.
Based on the same inventive concept, another embodiment of the present invention provides a device corresponding to the method for adjusting brightness of a display screen according to the embodiment of the present invention. Fig. 6 is a schematic structural diagram of a brightness adjusting device for a display screen according to an embodiment of the invention. The apparatus shown in fig. 6 includes an acquisition module 601, a calculation module 602, and an adjustment module 603, where:
the acquiring module 601 is configured to acquire an ambient light level acquired by an ambient light sensor;
the acquiring module 601 is further configured to acquire a first pulse modulation signal generated by the signal generator, where the first pulse modulation signal is used to characterize a current backlight brightness of the display screen;
the calculating module 602 is configured to calculate a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness;
the adjusting module 603 is configured to adjust the current backlight brightness of the display screen according to the second pulse modulation signal.
Optionally, when there is an occlusion of the ambient light sensor, the computing module 602 is specifically configured to:
performing compensation processing on the ambient light brightness according to a pre-stored brightness compensation coefficient to obtain real brightness;
Calculating the second pulse modulation signal according to the first pulse modulation signal and the real brightness;
the brightness compensation coefficient is a ratio between the brightness of a light source of a preset standard light source and the current brightness acquired by the ambient light sensor, and the current brightness is the brightness acquired when the ambient light sensor is irradiated by the preset standard light source.
Optionally, the calculating module 602 is specifically configured to calculate the duty cycle of the second pulse modulation signal according to the duty cycle of the first pulse modulation signal and the real light brightness;
the adjusting module 603 is specifically configured to adjust the current backlight brightness of the display screen according to the duty ratio of the second pulse modulation signal.
Optionally, the calculating module 602 is further specifically configured to query, from a preset luminance parameter mapping table, a corresponding matching duty ratio as the duty ratio of the second pulse modulation signal according to the duty ratio of the first pulse modulation signal and the real luminance;
the brightness parameter mapping table comprises a mapping relation among an input signal duty ratio, a brightness value and an output signal duty ratio, wherein the mapping relation is in one-to-one correspondence among the input signal duty ratio, the brightness value and the output signal duty ratio.
Optionally, the obtaining module 601 is specifically configured to obtain the ambient light level collected by the ambient light sensor when the display screen is detected to be in a preset peep-proof mode.
Optionally, the calculating module 602 is specifically configured to calculate the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real brightness;
the adjusting module 603 is specifically configured to adjust the current backlight brightness of the display screen according to the pulse amplitude of the second pulse modulation signal.
Optionally, the calculating module 602 is further specifically configured to query, according to the pulse amplitude of the first pulse modulated signal and the real brightness, a corresponding matching amplitude from a preset brightness amplitude mapping table, so as to be used as the pulse amplitude of the second pulse modulated signal;
the brightness amplitude mapping table comprises mapping relations among input signal amplitude values, brightness values and output signal amplitude values, wherein the mapping relations are in one-to-one correspondence among the input signal amplitude values, the brightness values and the output signal amplitude values.
The content not described in the embodiments of the present invention may be referred to the related description in the foregoing method embodiments, which is not repeated herein.
The technical scheme provided by the embodiment of the invention at least has the following technical effects or advantages: according to the invention, the ambient light brightness collected by the ambient light sensor and the first pulse modulation signal generated by the signal generator are obtained, so that the second pulse modulation signal is calculated according to the first pulse modulation signal and the ambient light brightness, and finally the current backlight brightness of the display screen is adjusted according to the second pulse modulation signal. In the scheme, the backlight brightness of the display screen can be automatically adjusted according to the ambient light brightness and the input first pulse modulation signal, so that the display screen peep-proof device is suitable for different application environments/scenes, the display screen backlight brightness adjustment accuracy and efficiency can be improved. In addition, the invention can solve the technical problems of unfavorable peeping display or inapplicability to special scenes such as darkrooms or outdoors in the prior peeping prevention technology.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (12)
1. A method for adjusting brightness of a display screen, the method comprising:
When the working mode of the display screen is switched from the sharing mode to the peep-proof mode, the ambient light brightness collected by the ambient light sensor is obtained;
acquiring a first pulse modulation signal generated by a signal generator, wherein the first pulse modulation signal is used for representing the current backlight brightness of a display screen;
calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness, comprising: inquiring a corresponding matching duty ratio from a preset signal brightness mapping table according to the ambient light brightness and the duty ratio of the first pulse modulation signal to serve as the duty ratio of the second pulse modulation signal; wherein the signal brightness mapping table includes: a mapping relationship among a plurality of level intervals of the ambient light level, a plurality of level intervals of the duty ratio of the first pulse modulation signal, and the duty ratio of the second pulse modulation signal; or, according to the ambient light brightness and the pulse amplitude of the first pulse modulation signal, searching a corresponding matching amplitude from a preset signal amplitude mapping table to be used as the pulse amplitude of the second pulse modulation signal, wherein the signal amplitude mapping table comprises: the mapping relation among the input signal amplitude value interval, the ambient light brightness value interval and the output signal amplitude value;
And adjusting the current backlight brightness of the display screen according to the second pulse modulation signal.
2. The method of claim 1, wherein said calculating a second pulse modulated signal from said first pulse modulated signal and said ambient light level when said ambient light sensor is occluded comprises:
performing compensation processing on the ambient light brightness according to a pre-stored brightness compensation coefficient to obtain real brightness;
calculating the second pulse modulation signal according to the first pulse modulation signal and the real brightness;
the brightness compensation coefficient is a ratio between the brightness of a light source of a preset standard light source and the current brightness acquired by the ambient light sensor, and the current brightness is the brightness acquired when the ambient light sensor is irradiated by the preset standard light source.
3. The method of claim 2, wherein said calculating a second pulse modulated signal based on said first pulse modulated signal and said true light intensity comprises:
calculating the duty ratio of the second pulse modulation signal according to the duty ratio of the first pulse modulation signal and the real brightness;
The adjusting the current backlight brightness of the display screen according to the second pulse modulation signal includes:
and adjusting the current backlight brightness of the display screen according to the duty ratio of the second pulse modulation signal.
4. A method according to claim 3, wherein said calculating the duty cycle of the second pulse modulated signal from the duty cycle of the first pulse modulated signal and the true luminance comprises:
according to the duty ratio of the first pulse modulation signal and the real brightness, inquiring a corresponding matching duty ratio from a preset brightness parameter mapping table to serve as the duty ratio of the second pulse modulation signal;
the brightness parameter mapping table comprises a mapping relation among an input signal duty ratio, a brightness value and an output signal duty ratio, wherein the mapping relation is in one-to-one correspondence among the input signal duty ratio, the brightness value and the output signal duty ratio.
5. The method of claim 2, wherein said calculating a second pulse modulated signal based on said first pulse modulated signal and said true light intensity comprises:
Calculating the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real brightness;
the adjusting the current backlight brightness of the display screen according to the second pulse modulation signal includes:
and adjusting the current backlight brightness of the display screen according to the pulse amplitude of the second pulse modulation signal.
6. The method of claim 5, wherein said calculating the pulse amplitude of the second pulse modulated signal based on the pulse amplitude of the first pulse modulated signal and the true luminance comprises:
inquiring a corresponding matching amplitude value from a preset brightness amplitude value mapping table according to the pulse amplitude value of the first pulse modulation signal and the real brightness, and taking the corresponding matching amplitude value as the pulse amplitude value of the second pulse modulation signal;
the brightness amplitude mapping table comprises mapping relations among input signal amplitude values, brightness values and output signal amplitude values, wherein the mapping relations are in one-to-one correspondence among the input signal amplitude values, the brightness values and the output signal amplitude values.
7. A display, the display comprising: the system comprises a microprocessor, an ambient light sensor, a signal generator and a display screen, wherein the ambient light sensor, the signal generator and the display screen are respectively connected with the microprocessor through buses, and the microprocessor is used for executing the following steps:
Acquiring the ambient light brightness acquired by the ambient light sensor;
when the working mode of the display screen is switched from a sharing mode to a peeping-preventing mode, a first pulse modulation signal generated by the signal generator is obtained, and the first pulse modulation signal is used for representing the current backlight brightness of the display screen;
calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness, comprising: inquiring a corresponding matching duty ratio from a preset signal brightness mapping table according to the ambient light brightness and the duty ratio of the first pulse modulation signal to serve as the duty ratio of the second pulse modulation signal; wherein the signal brightness mapping table includes: a mapping relationship among a plurality of level intervals of the ambient light level, a plurality of level intervals of the duty ratio of the first pulse modulation signal, and the duty ratio of the second pulse modulation signal; or, according to the ambient light brightness and the pulse amplitude of the first pulse modulation signal, searching a corresponding matching amplitude from a preset signal amplitude mapping table to be used as the pulse amplitude of the second pulse modulation signal, wherein the signal amplitude mapping table comprises: the mapping relation among the input signal amplitude value interval, the ambient light brightness value interval and the output signal amplitude value;
And adjusting the current backlight brightness of the display screen according to the second pulse modulation signal.
8. The display of claim 7, wherein said calculating a second pulse modulated signal from said first pulse modulated signal and said ambient light level when said ambient light sensor is occluded comprises:
performing compensation processing on the ambient light brightness according to a pre-stored brightness compensation coefficient to obtain real brightness;
calculating the second pulse modulation signal according to the first pulse modulation signal and the real brightness;
the brightness compensation coefficient is a ratio between the brightness of a light source of a preset standard light source and the current brightness acquired by the ambient light sensor, and the current brightness is the brightness acquired when the ambient light sensor is irradiated by the preset standard light source.
9. The display of claim 8, wherein said calculating a second pulse modulated signal based on said first pulse modulated signal and said true luminance comprises:
calculating the duty ratio of the second pulse modulation signal according to the duty ratio of the first pulse modulation signal and the real brightness;
The adjusting the current backlight brightness of the display screen according to the second pulse modulation signal includes:
and adjusting the current backlight brightness of the display screen according to the duty ratio of the second pulse modulation signal.
10. The display of claim 8, wherein said calculating the duty cycle of the second pulse modulated signal based on the duty cycle of the first pulse modulated signal and the true luminance comprises:
according to the duty ratio of the first pulse modulation signal and the real brightness, inquiring a corresponding matching duty ratio from a preset brightness parameter mapping table to serve as the duty ratio of the second pulse modulation signal;
the brightness parameter mapping table comprises a mapping relation among an input signal duty ratio, a brightness value and an output signal duty ratio, wherein the mapping relation is in one-to-one correspondence among the input signal duty ratio, the brightness value and the output signal duty ratio.
11. A brightness adjustment device for a display screen, the device comprising: the device comprises an acquisition module, a calculation module and an adjustment module, wherein:
the acquisition module is used for acquiring the ambient light brightness acquired by the ambient light sensor when the working mode of the display screen is switched from a sharing mode to a peep-proof mode;
The acquisition module is further used for acquiring a first pulse modulation signal generated by the signal generator, wherein the first pulse modulation signal is used for representing the current backlight brightness of the display screen;
the calculating module is configured to calculate a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness, and includes: inquiring a corresponding matching duty ratio from a preset signal brightness mapping table according to the ambient light brightness and the duty ratio of the first pulse modulation signal to serve as the duty ratio of the second pulse modulation signal; wherein the signal brightness mapping table includes: a mapping relationship among a plurality of level intervals of the ambient light level, a plurality of level intervals of the duty ratio of the first pulse modulation signal, and the duty ratio of the second pulse modulation signal; or, according to the ambient light brightness and the pulse amplitude of the first pulse modulation signal, searching a corresponding matching amplitude from a preset signal amplitude mapping table to be used as the pulse amplitude of the second pulse modulation signal, wherein the signal amplitude mapping table comprises: the mapping relation among the input signal amplitude value interval, the ambient light brightness value interval and the output signal amplitude value;
And the adjusting module is used for adjusting the current backlight brightness of the display screen according to the second pulse modulation signal.
12. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a program that, when run on a display, performs the brightness adjustment method of the display screen according to any one of the preceding claims 1-6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221708.6A CN113920925B (en) | 2021-10-20 | 2021-10-20 | Display screen brightness adjustment method, display, device and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111221708.6A CN113920925B (en) | 2021-10-20 | 2021-10-20 | Display screen brightness adjustment method, display, device and readable storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113920925A CN113920925A (en) | 2022-01-11 |
| CN113920925B true CN113920925B (en) | 2023-06-27 |
Family
ID=79241429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111221708.6A Active CN113920925B (en) | 2021-10-20 | 2021-10-20 | Display screen brightness adjustment method, display, device and readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113920925B (en) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172175A (en) * | 2018-01-04 | 2018-06-15 | 广东小天才科技有限公司 | It is a kind of for the bearing calibration of optical sensor, device, equipment and storage medium |
| KR20220074941A (en) * | 2019-10-02 | 2022-06-03 | 리얼디 스파크, 엘엘씨 | privacy display device |
| CN111028793B (en) * | 2020-01-06 | 2021-10-15 | 昆山龙腾光电股份有限公司 | Electronic equipment and backlight brightness adjusting method |
| CN111223458B (en) * | 2020-01-06 | 2022-02-15 | 昆山龙腾光电股份有限公司 | Display module and electronic equipment |
| CN211237684U (en) * | 2020-03-02 | 2020-08-11 | 昆山龙腾光电股份有限公司 | Backlight brightness adjusting device |
| CN212675893U (en) * | 2020-08-12 | 2021-03-09 | 昆山龙腾光电股份有限公司 | Backlight driving device and electronic device |
| CN112233626A (en) * | 2020-10-29 | 2021-01-15 | 昆山龙腾光电股份有限公司 | Backlight adjusting device, backlight adjusting method and display device |
-
2021
- 2021-10-20 CN CN202111221708.6A patent/CN113920925B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113920925A (en) | 2022-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107342058B (en) | Method, test board, system and equipment for adjusting brightness of liquid crystal display module | |
| CN100483500C (en) | Real-time dynamic design of liquid crystal display (LCD) panel power management through brightness control | |
| CN107111992B (en) | method and terminal for adjusting backlight brightness | |
| CN100371981C (en) | Method and apparatus for driving liquid crystal display | |
| JP2002258820A (en) | Automatic brightness controller for liquid crystal display module, and its method | |
| WO2015000270A1 (en) | Gamma voltage regulation method and system, and electronic device | |
| CN109855727B (en) | Ambient light detection method, ambient light detection device, electronic apparatus, and storage medium | |
| WO2005029459A1 (en) | Automatic image luminance control with backlight adjustment | |
| JP2003536111A (en) | Method and system for providing intensity modulation | |
| CN111754946B (en) | Image quality optimization method, display device and computer readable storage medium | |
| CN104916259A (en) | Method of controlling brightness of display screen of medical display, device and medical display | |
| US10186209B1 (en) | Night time control of brightness and blue light emission in device displays | |
| JP2023535256A (en) | Backlight driving method, apparatus and computer equipment | |
| CN110428783B (en) | Image display method and device | |
| CN104715736A (en) | Backlight automatic adjusting method and device for electronic device | |
| US11830446B2 (en) | Display apparatus and display control method | |
| KR101935865B1 (en) | Electronic board with reduced power consumption using dimming control | |
| US20140292632A1 (en) | Display apparatus, data gain regulating circuit and data gain regulating method | |
| CN113870805A (en) | Backlight control method, device, system and storage medium | |
| CN114627826A (en) | Backlight control method, apparatus, device, storage medium and program product | |
| CN114999404A (en) | Method and device for adjusting display brightness, intelligent terminal and storage medium | |
| CN113920925B (en) | Display screen brightness adjustment method, display, device and readable storage medium | |
| CN102110426B (en) | Efficient luminous display | |
| JP6312195B2 (en) | Integrated circuit device, integrated circuit, display device, and driver IC | |
| CN106373517B (en) | Display and display method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |