CN113920925A - Display screen brightness adjusting method, display, device and readable storage medium - Google Patents
Display screen brightness adjusting method, display, device and readable storage medium Download PDFInfo
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- CN113920925A CN113920925A CN202111221708.6A CN202111221708A CN113920925A CN 113920925 A CN113920925 A CN 113920925A CN 202111221708 A CN202111221708 A CN 202111221708A CN 113920925 A CN113920925 A CN 113920925A
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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]
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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
- G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
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- 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 adjusting 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 being not beneficial to peep-proof display or not being suitable for special scenes such as darkroom or outdoor and the like in the prior peep-proof technology.
Description
Technical Field
The invention relates to the technical field of display, in particular to a brightness adjusting method of a display screen, a display, a device and a readable storage medium.
Background
At present, more and more users use electronic devices such as computers and notebook computers to handle daily life and work. However, the usage 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 privacy or confidential information, it is undesirable that the important information be viewed by others. Therefore, a display screen peep-proof technology is required.
In the existing peep-proof technology, switching of an electronic device from a share mode to a peep-proof mode is supported, so that the peep-proof requirement of the electronic device is met. There are specifically two embodiments:
in the first embodiment, after the mode is switched to the peep-proof mode, the brightness of the display screen in the sharing mode before switching is maintained, but the brightness value is usually higher, which is not beneficial to the peep-proof display.
In the second embodiment, after switching to the peep-proof mode, the lamp is fixed at a lower preset brightness. However, in practice, it has been found that this solution, although advantageous for privacy displays, is not suitable for use in special situations such as darkrooms or outdoors.
Disclosure of Invention
The embodiment of the invention provides a brightness adjusting method, a display, a device and a readable storage medium of a display screen, and solves the technical problems that the existing peeping-proof technology is not beneficial to peeping-proof display or is not suitable for special scenes such as darkrooms or outdoor scenes.
In one aspect, the present invention provides a method for adjusting brightness of a display screen according to an embodiment of the present invention, where the method includes:
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 the ambient light sensor is blocked, the calculating a second pulse modulation signal according to the first pulse modulation signal and the ambient light brightness includes:
compensating the ambient light brightness according to a prestored brightness compensation coefficient to obtain real light brightness;
calculating the second pulse modulation signal according to the first pulse modulation signal and the real light brightness;
the brightness compensation coefficient is a ratio of light source brightness of a preset standard light source to current brightness acquired by the ambient light sensor, and the current brightness is brightness acquired when the preset standard light source is adopted to irradiate the ambient light sensor.
Optionally, the calculating a second pulse modulation signal according to the first pulse modulation signal and the real light brightness includes:
calculating the duty ratio of the second pulse modulation signal according to the duty ratio of the first pulse modulation signal and the real light brightness;
the adjusting the current backlight brightness of the display screen according to the second pulse modulation signal comprises:
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 light 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 mapping relations among input signal duty ratios, light brightness values and output signal duty ratios, wherein the mapping relations are in one-to-one correspondence among the input signal duty ratios, the light brightness values and the output signal duty ratios.
Optionally, the acquiring the ambient light brightness collected 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 a second pulse modulation signal according to the first pulse modulation signal and the real light brightness includes:
calculating the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real light brightness;
the adjusting the current backlight brightness of the display screen according to the second pulse modulation signal comprises:
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 light brightness includes:
according to the pulse amplitude of the first pulse modulation signal and the real light brightness, inquiring a corresponding matching amplitude from a preset brightness amplitude mapping table to serve as the pulse amplitude of the second pulse modulation signal;
the brightness amplitude mapping table comprises mapping relations among input signal amplitudes, light brightness values and output signal amplitudes, wherein the mapping relations are in one-to-one correspondence among the input signal amplitudes, the light brightness values and the output signal amplitudes.
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, and an ambient light sensor, a signal generator and a display screen which are respectively connected with the microprocessor through a bus, wherein 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 content that is not described or not illustrated in the present invention may be referred to the related description in the foregoing method embodiments, and is not described herein again.
On the other hand, the present invention provides a brightness adjusting apparatus for a display screen according to an embodiment of the present invention, the apparatus includes an obtaining module, a calculating module and an adjusting module, wherein:
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 calculation 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.
For the content that is not introduced or not described in the embodiments of the present invention, reference may be made to the related descriptions in the foregoing method embodiments, and details are not repeated here.
In another aspect, the present invention provides a computer-readable storage medium storing a program for executing the method for adjusting the brightness of a display screen as described above when the program runs on a display, according to an embodiment of the present invention.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: according to the invention, the ambient light brightness acquired by the ambient light sensor and the first pulse modulation signal generated by the signal generator are acquired, 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 anti-peeping device is suitable for different application environments/scenes, the purpose of anti-peeping of the display screen is achieved, and meanwhile, the accuracy and the efficiency of adjusting the backlight brightness of the display screen can be improved. In addition, the invention can also solve the technical problems of being not beneficial to peep-proof display or not suitable for special scenes such as darkroom or outdoor and the like in the existing peep-proof technology.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
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 by 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 provided in the embodiment of the present invention.
Fig. 5 is a flowchart illustrating 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 apparatus of a display screen according to an embodiment of the present invention.
Detailed Description
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
First, it is stated that the term "and/or" appearing herein is merely one type of associative relationship that describes an associated object, meaning that three types of relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
The applicant has discovered in the course of the present invention that: the existing display screen peep-proof technology is realized by adopting the following two implementation schemes.
In a first embodiment, please refer to fig. 1, which shows a schematic structural diagram of a possible display provided by the prior art. The display shown in fig. 1 includes a Central Processing Unit (CPU) or an Embedded Controller (EC) 101, a timing control chip (T-CON) 102, a waveform module 103, a display screen (which may also be a display screen Driver)104, and a peep prevention unit 105. The CPU/EC 101 generates an input 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 peep prevention unit 105, which may specifically be a primary rate interface (PRI _ EN) enable signal. 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 viewing angle of the display screen according to the square wave signal (e.g., square wave frequency, etc.), so as to support a user to see within the viewing angle range, thereby achieving a purpose of display peep-proof.
As shown, the backlight control of the display screen 104 (specifically, the T-CON chip 102 in the figure) and the control of the peep prevention unit 105 (specifically, the waveform module 103 in the figure) are two functional modules that operate independently. 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 in the sharing mode before switching. However, the brightness is usually higher, which is not favorable for the anti-peep display. When the system is used by a user, the system of the display controls the backlight brightness of the display screen to have a plurality of preset brightness levels, and the peep-proof effects corresponding to different brightness levels are different.
In a second embodiment, please refer to fig. 2, which shows a schematic structural diagram of another possible display provided by the prior art. The display shown in fig. 2 includes: a central processing unit CPU or an embedded controller EC201, a Microprocessor (MCU) 202, a display screen (also may be a display screen Driver)203, and a peep prevention unit 204. The CPU/EC 201 generates an input 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 peep-proof unit 204, which may specifically be a primary rate interface (PRI _ EN) enable signal. The MCU202 is configured to generate corresponding PWMO and square wave signals according to the PWMI and the PRI _ EN. The PWMO is used to control or drive the display screen 203 to operate, for example, to control the 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 and provided by the peep-proof unit 204, so as to support the user to view within the visual angle range, thereby achieving the purpose of displaying peep-proof.
In this scenario, the backlight control of the display screen 203 is integrated with the control of the privacy unit 204 (specifically 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 to a lower preset brightness position, although the peep-proof display effect is facilitated, the good peep-proof effect cannot be achieved by aiming at the use of a user in a dark room, an outdoor scene and other special scenes.
In order to solve the above problems, the present invention provides a display device that has a high peep-proof effect and is suitable for various application scenarios. Fig. 3 is a schematic structural diagram of a possible display according to an embodiment of the present invention. The display shown in fig. 3 includes an ambient light sensor 301, a signal generator 302, a microprocessor 303, a display screen 304 and a peep-proof 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 manner is not limited in the present invention, for example, the connection manner is a bus connection.
Optionally, the ambient light sensor 301 (ALS) may be connected to the microprocessor 303 through a bus interface, including but not limited to an integrated circuit bus (I2C) interface, an int (interface) interface or other bus interface, etc. The bus interface correspondingly adopts a bus including, but not limited to, a data line (SDA) and a control line (SCL). In practical applications, the type and type of the ambient light sensor 301 are not limited, and may be determined according to actual requirements of the system, for example, the ambient light sensor 301 may be a CM32181E ALS chip. The CM32181E ALS chip supports 16-bit (bit) high-sensitivity ambient light data acquisition, and the maximum ambient light intensity can be acquired at 2700 nit (nit). When the system starts the ambient light sensor 301, it can transmit the collected 16bit ambient light level to the microprocessor 303 through the I2C interface.
In practical applications, in consideration of the situation that the ambient light sensor 301 may be shielded, and the ambient light intensity collected by the ambient light sensor is attenuated, the microprocessor 303 needs to perform brightness compensation to keep the actual ambient light intensity consistent with the actual ambient light intensity. 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 current light brightness and transmits the current light brightness to the microprocessor 303. The microprocessor 303 compares the current light brightness with a target value (i.e., the light source brightness of the standard light source), and calculates a corresponding brightness compensation coefficient. For example, taking the light source luminance of the standard light source as 200nit and the current light luminance as 160nit as an example, the microprocessor 203 may calculate to obtain a luminance compensation coefficient 200/160 equal to 1.25.
Accordingly, the present invention writes the brightness compensation coefficient into the microprocessor 303 for storage through 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 used for generating an operation signal of the display, for example, the first pulse modulation signal PWMI for adjusting the backlight brightness of the display screen 304 and the enable signal PRI _ EN for controlling the operation of the peep-proof unit 305 can be generated in the present invention. In practical applications, 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 chips or devices for generating display operation signals.
The microprocessor MCU 303 is configured to acquire 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. 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 are detailed below the present invention, and are not described here.
The microprocessor MCU 303 is further configured to acquire 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 peep prevention unit 305. For example, the peep prevention unit 305 is configured to control the viewing angle of the display screen 304 according to the square wave signal (e.g., square wave frequency) to support viewing within the range of the viewing angle, so as to achieve the purpose of displaying peep prevention. The present invention is not described in detail and limited herein with respect to the specific implementation of the peep prevention unit 305.
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 system via an embedded display (eDP) interface of the display. The eDP interface (or eDP PIN) used for the corresponding transmission of the PRI _ EN may be a to be defined PIN (TBD) on a chip, such as PIN24, and the invention is not limited thereto.
Optionally, the display may further include a crystal (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 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 peep-proof 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 manner is not limited. For example, the signal generator 302 is shown connected to the timing control chip 306 via an audio input (AUX) interface. The timing control chip 306 is connected to 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 ambient light sensor 301, the signal generator 302, the microprocessor 303, the display screen 304 and the peep-proof unit 305 are described with reference to the embodiment of fig. 3, and the present invention is not limited thereto.
It should be noted that the working modes of the display disclosed by the 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 or 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 prevention unit 305 are both turned off, that is, the ambient light sensor 301 and the peep prevention unit 305 are not enabled.
When the display is in the privacy protection mode, the enable signal PRI _ EN output by the system is at a high level, and the microprocessor 303 controls to activate the ambient light sensor 301, so as to collect the ambient light brightness (which may also be 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 brightness 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, thereby achieving a better anti-peeping purpose.
Therefore, when the sharing mode of the display is switched to the peep-proof mode, the enable signal PRI _ EN needs to be controlled to be at a high level, the microcontroller 303 outputs a square wave signal and starts the ambient light sensor 301, that is, the PRI _ EN high, the MCU outputs a square wave signal ON and ALS ON. On the contrary, when the privacy mode of the display is switched to the sharing mode, the enable signal PRI _ EN needs to be controlled to be at a low level, the microcontroller 303 does not allow to output a square wave signal and turn OFF the ambient light sensor 301, that is, PRI _ EN low, and the MCU outputs square wave signals OFF and ALS OFF.
Fig. 5 is a schematic flow chart illustrating 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, in particular to the microprocessor side of the display, and comprises the following implementation steps:
s501, obtaining the ambient light brightness collected by the ambient light sensor.
The environment light brightness is the environment brightness of the current environment collected by the environment light sensor. In a specific embodiment, when the display is detected to be in the preset peep-proof mode, the ambient light sensor can be started to collect the current ambient light brightness, and then the ambient light brightness collected by the ambient light sensor is obtained.
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 the display screen.
The first pulse modulation signal (which may be referred to as PWMI above) of the present invention 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 in the present invention, and for example, the present invention may first execute step S502 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 of the existence of steps S503 and S504 are described below.
In one embodiment, when the ambient light sensor is not blocked, the present invention may directly calculate a second pulse modulation signal (PWMO), for example, signal parameters such as a duty ratio and a pulse amplitude of the second pulse modulation signal, according to the first pulse modulation signal (PWMI) and the ambient light level. And further adjusting the current backlight brightness of the display screen by using signal parameters such as duty ratio, pulse amplitude and the like of the second pulse modulation signal. Several possible embodiments of which are presented below.
In an embodiment, the duty ratio of the second pulse modulation signal may be calculated according to the duty ratio of the first pulse modulation signal and the ambient light brightness.
In a specific implementation manner, in a possible implementation manner, the present invention may query, from a preset signal brightness mapping table, a matching duty cycle corresponding to the duty cycle of the first pulse modulation signal and the ambient light brightness according to the duty cycle of the first pulse modulation signal and the ambient light brightness, and further use the matching duty cycle as the duty cycle of the second pulse modulation signal. The signal brightness mapping table is configured in advance by a system, and includes mapping relationships among an input signal duty ratio, a brightness value and an output signal duty ratio, and the mapping relationships are in one-to-one correspondence, that is, 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 amplitude, the light brightness value, and the output signal amplitude in the signal amplitude mapping table is not limited in the present invention, and is usually plural.
In a specific implementation, the present invention may perform the step division (or classification) on the ambient light brightness, and a specific step division/manner of the step division is not limited in the present invention. In practical application, the more steps, the better the effect, the more steps (or levels) of the second pulse modulation signal which is output by the system in a matching manner are. For example, the present invention can level the ambient light brightness into 8 level intervals, which can be respectively represented as S0 to S7. The system is also divided into 8 level sections, respectively denoted as L0-L7, from dark to light according to the PWMI backlight brightness adjustment set by the user. Accordingly, the signal brightness mapping table may be represented as shown in table 1 below.
TABLE 1
| SL | S0 | S1 | S2 | S3 | S4 | S5 | S6 | S7 |
| L0 | SL00 | SL10 | SL20 | SL30 | SL40 | SL50 | SL60 | SL70 |
| L1 | SL01 | SL11 | SL21 | SL31 | SL41 | SL51 | SL61 | SL71 |
| L2 | SL02 | SL12 | SL22 | SL32 | SL42 | SL52 | SL62 | SL72 |
| L3 | SL03 | SL13 | SL23 | SL33 | SL43 | SL53 | SL63 | SL73 |
| L4 | SL04 | SL14 | SL24 | SL34 | SL44 | SL54 | SL64 | SL74 |
| L5 | SL05 | SL15 | SL25 | SL35 | SL45 | SL55 | SL65 | SL75 |
| L6 | SL06 | SL16 | SL26 | SL36 | SL46 | SL56 | SL66 | SL76 |
| L7 | SL07 | SL17 | SL27 | SL37 | SL47 | SL57 | SL67 | SL77 |
As shown in Table 1, the brightness level interval S of the ring can be determined according to the brightness of the ringi(ii) a According to the duty ratio of the first pulse modulation signal, determining the duty ratio grade interval L to which the first pulse modulation signal belongsj(ii) a And then according to SiAnd LjThe corresponding matching duty ratio SL is looked up from the above Table 1ij. Wherein i and j are both positive integers less than or equal to 7.
For another example, the signal brightness mapping table is a 6 × 11 table shown in table 2 below. The ambient light brightness in the signal brightness mapping table is divided into 6 level intervals according to actual requirements, which are respectively represented as a 0-a 5, and the brightness range corresponding to each level interval is shown in table 2 below. The duty ratio of the first pulse modulation signal PWMI in the signal brightness mapping table is divided into 11 level sections, which are respectively represented as L0-L10, according to actual requirements, and the duty ratio range corresponding to each level section is shown in table 2 below.
TABLE 2
In table 2 above, the maximum backlight brightness of the display panel that the first pulse modulation signal PWMI supports to be adjusted is 1000nit, that is, the duty ratio of the first pulse modulation signal corresponding to 1000nit is 100%. As can be seen from the above table 2, the duty ratio (duty) of the second pulse modulation signal is equal to the required brightness (i.e. the currently required backlight brightness of the display screen) divided by the maximum backlight brightness multiplied by 100%. Correspondingly, 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 found according to the table 2, the required backlight brightness of the display screen corresponding to the second pulse modulation signal at the moment can be calculated according to the deformation formula of the 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, where the maximum backlight brightness is 1000nit in this example. And then adjusting the current backlight brightness of the display screen according to the calculated required backlight brightness corresponding to the second pulse modulation signal, thereby achieving the purpose of peep-proof display.
In another possible embodiment, the present invention may perform a look-up table (LUT) logical operation on the duty ratio of the first pulse modulation signal and the ambient light brightness to obtain a corresponding LUT compensation coefficient (also referred to as an LUT logical operation coefficient). And further adjusting the duty ratio of the first pulse modulation signal according to the table look-up compensation coefficient 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 may be input into the microprocessor MCU, and LUT logical operation may be performed, for example, a table lookup compensation coefficient corresponding to the duty ratio may be searched from a preset coefficient brightness mapping table. And further adjusting the duty ratio of the first pulse modulation signal according to the table look-up compensation coefficient to obtain the duty ratio of the second pulse modulation signal. Wherein:
the coefficient brightness mapping table is configured in advance by a system and at least comprises the 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 applications, the table lookup compensation coefficient (i.e., LUT logical operation coefficient) is a compensation coefficient with the best peep-proof effect obtained by performing an experimental test under different ambient light intensities and different duty ratios of the first pulse modulation signal. In other words, the table lookup compensation coefficient is the real compensation coefficient obtained from the actual experimental test. With reference to the description of the foregoing embodiments, the present invention may also actually require the step of the ambient light brightness and the duty ratio of the first pulse modulation signal. Correspondingly, the table lookup compensation coefficient is specifically a compensation coefficient with the best peep-proof effect obtained by performing actual measurement under the condition of the brightness level interval of the step in which different ambient light brightness is located and the duty ratio level interval of the step in which different duty ratios of the first pulse modulation signal are located.
In another possible embodiment, the invention may use a first pre-trained mathematical model to calculate the duty ratio of the first pulse modulation signal and the ambient light brightness, so as to output the duty ratio of the second pulse modulation signal. The first mathematical model is a model set by the system in a self-defining way, and may be specifically set according to the actual needs of the system, and may include, but is not limited to, a convolutional neural network model, a recursive cyclic neural network model, or other deep learning models.
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 brightness. 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; conversely, when the pulse modulation signal is a voltage signal, the corresponding signal pulse amplitude is a voltage amplitude. Several possible embodiments of which exist are described below.
In a possible embodiment, the present invention may query a matching amplitude corresponding to the pulse amplitude of 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 serve as the pulse amplitude of the second pulse modulation signal. The signal amplitude mapping table is configured in advance by a system, and may include mapping relationships among an input signal amplitude, a luminance value and an output signal amplitude, and the mapping relationships are in one-to-one correspondence, that is, the input signal duty ratio, the luminance 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 amplitude, the light brightness value, and the output signal amplitude in the signal amplitude mapping table is not limited in the present invention, and is usually plural.
Optionally, the present invention may further perform a step division on the ambient light brightness and the pulse amplitude of the first pulse modulation signal, and a specific implementation manner or a step division interval of the step division is not limited in the present invention. The number of the level interval corresponding to the gradation of the ambient light brightness and the number of the level interval corresponding to the gradation of the pulse amplitude of the first pulse modulation signal may be the same or different, and the present invention is not limited thereto. Accordingly, the signal amplitude mapping table may specifically include mapping relationships among an input signal amplitude interval, a luminance value interval, and the output signal amplitude. The signal amplitude mapping table may refer to the related description of the signal brightness mapping table, and the detailed description of the invention is omitted here.
In another possible embodiment, 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 brightness to obtain a corresponding amplitude compensation coefficient (also referred to as an LUT logic operation coefficient). And further adjusting the pulse amplitude of the first pulse modulation signal according to the amplitude compensation coefficient to obtain the pulse amplitude of the second pulse modulation signal.
Optionally, the present invention may further perform a step division on the ambient light brightness and the pulse amplitude of the first pulse modulation signal, and a specific implementation manner or a step division interval of the step division is not limited in the present invention. Accordingly, the present invention may specifically perform LUT logic operation according to the class interval of the level to which the ambient light brightness belongs and the class interval of the level to which the pulse amplitude of the first pulse modulation signal belongs, which may be referred to the related descriptions in the foregoing embodiments, and the present invention is not described in detail herein.
In another possible embodiment, the invention may use a second mathematical model trained in advance to calculate the pulse amplitude of the first pulse modulation signal and the ambient light brightness, so as to output the pulse amplitude of the second pulse modulation signal. The second mathematical model is a model set by the system in a self-defining way, and may specifically be set according to the actual needs of the system, and may include, but is not limited to, a convolutional neural network model, a recursive cyclic neural network model, or other deep learning models.
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 real light brightness of the current environment. The brightness compensation coefficient is a ratio of light source brightness of a preset standard light source to current brightness acquired by the ambient light sensor, and the current brightness is brightness acquired by the ambient light sensor when the preset standard light source is adopted to irradiate the ambient light sensor.
Further, the second pulse modulation signal can be calculated according to the first pulse modulation signal and the real light brightness. There are several possible embodiments of this.
In an embodiment, the duty ratio of the second pulse modulation signal may be calculated according to the duty ratio of the first pulse modulation signal and the real light brightness.
In a specific implementation manner, in a possible implementation manner, the present invention may query, from a preset luminance parameter mapping table, a matching duty ratio corresponding to the duty ratio of the first pulse modulation signal and the real luminance, to serve as the duty ratio of the second pulse modulation signal. The brightness parameter mapping table is configured in advance by a system, and includes mapping relationships among an input signal duty ratio, a brightness value and an output signal duty ratio, and the mapping relationships are in one-to-one correspondence, that is, 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 multiple.
Optionally, the invention may perform step division on the real light brightness and the duty ratio of the first pulse modulation signal, and the specific implementation manner or the step division interval of the step division is not limited in the invention. Correspondingly, the luminance parameter mapping table may specifically include a mapping relationship among an input signal duty cycle interval, a luminance value interval, and the output signal duty cycle. For the brightness parameter mapping table, reference may be made to the related description of the signal brightness mapping table, which is not repeated herein.
In another possible embodiment, the present invention may perform a look-up table LUT logical operation on the duty ratio of the first pulse modulation signal and the real light brightness to obtain a corresponding look-up table compensation coefficient. And further adjusting the duty ratio of the first pulse modulation signal according to the table look-up compensation coefficient to obtain the duty ratio of the second pulse modulation signal. For how to calculate and obtain the table look-up compensation coefficient, reference may be made to the related description of performing LUT logical operation according to the duty ratio of the first pulse modulation signal and the ambient light brightness in the foregoing embodiment, and details are not repeated here.
In another possible embodiment, the invention may use a third pre-trained mathematical model to calculate the duty ratio of the first pulse modulation signal and the real light brightness, so as to output the duty ratio of the second pulse modulation signal. The third mathematical model is a model set by the system in a self-defining way, and may specifically be set according to the actual needs of the system, and may include, but is not limited to, a convolutional neural network model, a recursive cyclic neural network model, or other deep learning models.
In another embodiment, the invention can calculate the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real light brightness. The pulse amplitude referred to in the present invention may specifically refer to a current amplitude or a voltage amplitude.
In a specific implementation manner, in a possible implementation manner, the present invention may query, from a preset luminance amplitude mapping table, a matching amplitude corresponding to a pulse amplitude of the first pulse modulation signal and the real luminance, as the pulse amplitude of the second pulse modulation signal. The brightness amplitude mapping table is configured in advance by the system, and may include mapping relationships among input signal amplitudes, light brightness values, and output signal amplitudes, and the mapping relationships are in one-to-one correspondence, that is, the input signal duty ratios, the light brightness values, and the output signal duty ratios are in one-to-one correspondence. In practical applications, the number of the mapping relationships is not limited, and is usually multiple.
Optionally, the invention may perform step division on the real light brightness and the pulse amplitude of the first pulse modulation signal, and the specific implementation manner or the step division interval of the step division is not limited in the invention. Correspondingly, the luminance amplitude mapping table may specifically include mapping relationships among an input signal amplitude interval, a luminance value interval, and the output signal amplitude. For the brightness amplitude mapping table, reference may be made to the related description of the signal amplitude mapping table, which is not repeated herein.
In another possible embodiment, 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 light brightness to obtain a corresponding amplitude compensation coefficient (also referred to as an LUT logic operation coefficient). And further adjusting the pulse amplitude of the first pulse modulation signal according to the amplitude compensation coefficient to obtain the pulse amplitude of the second pulse modulation signal.
Optionally, the invention may further perform step division on the real light brightness and the pulse amplitude of the first pulse modulation signal, and a specific implementation manner or a step division interval of the step division is not limited in the invention. Accordingly, the present invention may specifically perform LUT logic operation according to the class interval of the gradation to which the real light brightness belongs and the class interval of the gradation to which the pulse amplitude of the first pulse modulation signal belongs, which may be referred to the related descriptions in the foregoing embodiments, and the present invention is not described in detail herein.
In another possible embodiment, the invention may use a pre-trained fourth mathematical model to calculate the pulse amplitude of the first pulse modulation signal and the real light brightness, so as to output the pulse amplitude of the second pulse modulation signal. The fourth mathematical model is a model set by the system in a self-defining way, and may specifically be set according to the actual needs of the system, and may include, but is not limited to, a convolutional neural network model, a recursive cyclic neural network model, or other deep learning models.
It should be noted that the first mathematical model, the second mathematical model, the third mathematical model and the fourth mathematical model are all pre-trained by the system, and the model frames corresponding to the first mathematical model, the second mathematical model, the third mathematical model and the fourth mathematical model may be the same, for example, all the neural network models, and may also be different, and the present invention is not limited.
By implementing the embodiment of the invention, the ambient light brightness acquired by the ambient light sensor and the first pulse modulation signal generated by the signal generator are acquired, 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 anti-peeping device is suitable for different application environments/scenes, the purpose of anti-peeping of the display screen is achieved, and meanwhile, the accuracy and the efficiency of adjusting the backlight brightness of the display screen can be improved. In addition, the invention can also solve the technical problems of being not beneficial to peep-proof display or not suitable for special scenes such as darkroom or outdoor and the like in the existing peep-proof technology.
Based on the same inventive concept, another embodiment of the present invention provides a device corresponding to the method for adjusting the brightness of the display screen according to the embodiment of the present invention. Fig. 6 is a schematic structural diagram of a brightness adjustment apparatus for a display screen according to an embodiment of the present invention. The apparatus shown in fig. 6 includes an obtaining module 601, a calculating module 602, and an adjusting module 603, wherein:
the obtaining module 601 is configured to obtain the ambient light brightness collected by the ambient light sensor;
the obtaining module 601 is further configured to obtain a first pulse modulation signal generated by the signal generator, where the first pulse modulation signal is used to represent the 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 the ambient light sensor is blocked, the computing module 602 is specifically configured to:
compensating the ambient light brightness according to a prestored brightness compensation coefficient to obtain real light brightness;
calculating the second pulse modulation signal according to the first pulse modulation signal and the real light brightness;
the brightness compensation coefficient is a ratio of light source brightness of a preset standard light source to current brightness acquired by the ambient light sensor, and the current brightness is brightness acquired when the preset standard light source is adopted to irradiate the ambient light sensor.
Optionally, the calculating module 602 is specifically configured to calculate a duty ratio of the second pulse modulation signal according to the duty ratio 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, according to the duty ratio of the first pulse modulation signal and the real light brightness, a corresponding matching duty ratio from a preset brightness parameter mapping table, so as to serve as the duty ratio of the second pulse modulation signal;
the brightness parameter mapping table comprises mapping relations among input signal duty ratios, light brightness values and output signal duty ratios, wherein the mapping relations are in one-to-one correspondence among the input signal duty ratios, the light brightness values and the output signal duty ratios.
Optionally, the obtaining module 601 is specifically configured to obtain the ambient light brightness collected by the ambient light sensor when detecting that the display screen is in a preset peep-proof mode.
Optionally, the calculating module 602 is specifically configured to calculate a pulse amplitude of the second pulse modulation signal according to the pulse amplitude 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 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 modulation signal and the real light brightness, a corresponding matching amplitude from a preset brightness amplitude mapping table to serve as the pulse amplitude of the second pulse modulation signal;
the brightness amplitude mapping table comprises mapping relations among input signal amplitudes, light brightness values and output signal amplitudes, wherein the mapping relations are in one-to-one correspondence among the input signal amplitudes, the light brightness values and the output signal amplitudes.
For the content not described in the embodiment of the present invention, reference may be made to the related description in the foregoing method embodiment, and details are not repeated here.
The technical scheme in the embodiment of the invention at least has the following technical effects or advantages: according to the invention, the ambient light brightness acquired by the ambient light sensor and the first pulse modulation signal generated by the signal generator are acquired, 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 anti-peeping device is suitable for different application environments/scenes, the purpose of anti-peeping of the display screen is achieved, and meanwhile, the accuracy and the efficiency of adjusting the backlight brightness of the display screen can be improved. In addition, the invention can also solve the technical problems of being not beneficial to peep-proof display or not suitable for special scenes such as darkroom or outdoor and the like in the existing peep-proof technology.
As will be appreciated by one skilled in the art, 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 flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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. Therefore, it is intended that the appended claims be interpreted as including 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 changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (14)
1. A method for adjusting brightness of a display screen, the method comprising:
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.
2. The method of claim 1, wherein calculating a second pulse modulation signal based on the first pulse modulation signal and the ambient light level when there is occlusion in the ambient light sensor comprises:
compensating the ambient light brightness according to a prestored brightness compensation coefficient to obtain real light brightness;
calculating the second pulse modulation signal according to the first pulse modulation signal and the real light brightness;
the brightness compensation coefficient is a ratio of light source brightness of a preset standard light source to current brightness acquired by the ambient light sensor, and the current brightness is brightness acquired when the preset standard light source is adopted to irradiate the ambient light sensor.
3. The method of claim 2, wherein said calculating a second pulse modulated signal based on said first pulse modulated signal and said actual light 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 light brightness;
the adjusting the current backlight brightness of the display screen according to the second pulse modulation signal comprises:
and adjusting the current backlight brightness of the display screen according to the duty ratio of the second pulse modulation signal.
4. The method of claim 3, wherein calculating the duty cycle of the second pulse modulated signal based on the duty cycle of the first pulse modulated signal and the real light 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 mapping relations among input signal duty ratios, light brightness values and output signal duty ratios, wherein the mapping relations are in one-to-one correspondence among the input signal duty ratios, the light brightness values and the output signal duty ratios.
5. The method of claim 1, wherein said obtaining the ambient light level collected by the ambient light sensor comprises:
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.
6. The method of claim 1, wherein said calculating a second pulse modulated signal based on said first pulse modulated signal and said actual light 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 light brightness;
the adjusting the current backlight brightness of the display screen according to the second pulse modulation signal comprises:
and adjusting the current backlight brightness of the display screen according to the pulse amplitude of the second pulse modulation signal.
7. The method according to claim 6, wherein calculating the pulse amplitude of the second pulse modulation signal according to the pulse amplitude of the first pulse modulation signal and the real light brightness comprises:
according to the pulse amplitude of the first pulse modulation signal and the real light brightness, inquiring a corresponding matching amplitude from a preset brightness amplitude mapping table to serve as the pulse amplitude of the second pulse modulation signal;
the brightness amplitude mapping table comprises mapping relations among input signal amplitudes, light brightness values and output signal amplitudes, wherein the mapping relations are in one-to-one correspondence among the input signal amplitudes, the light brightness values and the output signal amplitudes.
8. A display, characterized in that the display comprises: the system comprises a microprocessor, and an ambient light sensor, a signal generator and a display screen which are respectively connected with the microprocessor through a bus, wherein 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.
9. The display of claim 8, wherein when there is occlusion in the ambient light sensor, the calculating a second pulse modulation signal based on the first pulse modulation signal and the ambient light level comprises:
compensating the ambient light brightness according to a prestored brightness compensation coefficient to obtain real light brightness;
calculating the second pulse modulation signal according to the first pulse modulation signal and the real light brightness;
the brightness compensation coefficient is a ratio of light source brightness of a preset standard light source to current brightness acquired by the ambient light sensor, and the current brightness is brightness acquired when the preset standard light source is adopted to irradiate the ambient light sensor.
10. The display of claim 9, wherein said calculating a second pulse modulation signal based on said first pulse modulation signal and said actual light 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 light brightness;
the adjusting the current backlight brightness of the display screen according to the second pulse modulation signal comprises:
and adjusting the current backlight brightness of the display screen according to the duty ratio of the second pulse modulation signal.
11. The display of claim 9, wherein the calculating 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 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 mapping relations among input signal duty ratios, light brightness values and output signal duty ratios, wherein the mapping relations are in one-to-one correspondence among the input signal duty ratios, the light brightness values and the output signal duty ratios.
12. The display of claim 8, wherein the obtaining of the ambient light level collected by the ambient light sensor comprises:
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.
13. A brightness adjustment apparatus for a display screen, the apparatus 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;
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 calculation 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.
14. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a program that executes the brightness adjustment method of the display screen according to any one of claims 1 to 7 when the program is run on a display.
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Citations (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 |
| CN111028793A (en) * | 2020-01-06 | 2020-04-17 | 昆山龙腾光电股份有限公司 | Electronic equipment and backlight brightness adjusting method |
| CN111223458A (en) * | 2020-01-06 | 2020-06-02 | 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 |
| 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 |
| 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 |
| US20210104209A1 (en) * | 2019-10-02 | 2021-04-08 | Reald Spark, Llc | Privacy display apparatus |
-
2021
- 2021-10-20 CN CN202111221708.6A patent/CN113920925B/en active Active
Patent Citations (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 |
| US20210104209A1 (en) * | 2019-10-02 | 2021-04-08 | Reald Spark, Llc | Privacy display apparatus |
| CN111028793A (en) * | 2020-01-06 | 2020-04-17 | 昆山龙腾光电股份有限公司 | Electronic equipment and backlight brightness adjusting method |
| CN111223458A (en) * | 2020-01-06 | 2020-06-02 | 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 |
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|---|---|
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