CN115578990A - Backlight brightness adjusting method and device, television and storage medium - Google Patents

Backlight brightness adjusting method and device, television and storage medium Download PDF

Info

Publication number
CN115578990A
CN115578990A CN202211238176.1A CN202211238176A CN115578990A CN 115578990 A CN115578990 A CN 115578990A CN 202211238176 A CN202211238176 A CN 202211238176A CN 115578990 A CN115578990 A CN 115578990A
Authority
CN
China
Prior art keywords
backlight
brightness
adjusting
brightness data
current
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.)
Pending
Application number
CN202211238176.1A
Other languages
Chinese (zh)
Inventor
杨文祥
胡向峰
盘桥富
熊品
黄德强
武超伟
张吉鹏
李振乔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Skyworth RGB Electronics Co Ltd
Original Assignee
Shenzhen Skyworth RGB Electronics Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shenzhen Skyworth RGB Electronics Co Ltd filed Critical Shenzhen Skyworth RGB Electronics Co Ltd
Priority to CN202211238176.1A priority Critical patent/CN115578990A/en
Publication of CN115578990A publication Critical patent/CN115578990A/en
Pending legal-status Critical Current

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
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/10—Intensity circuits
    • 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
    • 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
    • G09G3/34—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 by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • 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
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

The application discloses a backlight brightness adjusting method, a backlight brightness adjusting device, a television and a storage medium, wherein the backlight brightness adjusting method is applied to a constant current driving unit and comprises the following steps: receiving backlight brightness data sent by a main board; if the current brightness is determined to be in the brightness automatic adjusting mode, determining a current amplitude value corresponding to the backlight lamp according to the backlight brightness data and a preset current set value; adjusting the brightness of the backlight based on the current amplitude and the backlight brightness data. The technical problem that the picture display effect is poor after the brightness of the backlight lamp is adjusted is solved.

Description

Backlight brightness adjusting method and device, television and storage medium
Technical Field
The present application relates to the field of television technologies, and in particular, to a method and an apparatus for adjusting brightness of a backlight, a television, and a storage medium.
Background
HDR (High-Dynamic Range, high Dynamic Range image) is capable of providing more Dynamic Range and image details than general images, and is generally used in television display products and picture video capture production. At present, all HDR functional algorithms are applied to a System On Chip (SOC) end of a main board, and a constant current driving scheme only performs simple SPI (Serial Peripheral Interface) signal transmission, that is, changes synchronously with SPI data sent by the SOC, and cannot actively adjust channel current. In the prior art, an MCU sets a current parameter configured by a constant current driver IC (integrated circuit) to a maximum value, and further changes SPI data through a motherboard SOC end to realize conditions of currents required by different windows.
Disclosure of Invention
The present application mainly aims to provide a backlight brightness adjusting method, device, television and storage medium, and aims to solve the technical problem that the picture display effect is poor after the brightness of the backlight is adjusted.
In order to achieve the above object, the present application provides a backlight brightness adjusting method, which is applied to a television, and includes the following steps:
receiving backlight brightness data sent by a main board;
if the current brightness is determined to be in the brightness automatic adjusting mode, determining a current amplitude value corresponding to the backlight lamp according to the backlight brightness data and a preset current set value;
adjusting the brightness of the backlight based on the current amplitude and the backlight brightness data.
The present application also provides a backlight brightness adjusting apparatus, including:
the receiving module is used for receiving backlight brightness data sent by the main board;
the current amplitude determining module is used for determining the current amplitude corresponding to the backlight lamp according to the backlight brightness data and a preset current set value if the current amplitude determining module is determined to be in the brightness automatic adjusting mode;
and the backlight brightness adjusting module is used for adjusting the brightness of the backlight lamp based on the current amplitude and the backlight brightness data.
The present application further provides a television, the television is an entity device, the television includes: a memory, a processor and a program of the backlight brightness adjusting method stored on the memory and executable on the processor, wherein the program of the backlight brightness adjusting method can realize the steps of the backlight brightness adjusting method as described above when executed by the processor.
Optionally, the television set further comprises a main board, a backlight, and a power supply, wherein,
the main board is used for sending backlight brightness data and a backlight control signal to the constant current driving unit so that the constant current driving unit can adjust the brightness of the backlight lamp based on the backlight brightness data and the backlight control signal.
The present application also provides a storage medium which is a computer-readable storage medium having stored thereon a program for implementing the backlight luminance adjusting method, the program implementing the steps of the backlight luminance adjusting method as described above when executed by a processor.
The present application also provides a computer program product comprising a computer program which, when being executed by a processor, realizes the steps of the backlight brightness adjustment method as described above.
The backlight brightness adjusting method is applied to a constant current driving unit, and dynamic adjustment of current amplitude values based on backlight brightness data is achieved by receiving backlight brightness data sent by a main board, if the backlight brightness data and a preset current set value are determined to be in a brightness automatic adjusting mode at present, auxiliary control of the backlight brightness adjusting process based on the backlight brightness data is achieved by the constant current driving unit, compared with a mode of adjusting a fixed current maximum value based on SPI data, the method does not need the main board to calculate and process SPI data in different window and different scene picture switching processes, only needs to read out required backlight brightness data corresponding to pictures, and when the SPI data are suddenly changed, current sudden change possibly caused by the sudden change of the current amplitude values can be smoothened by the constant current driving unit, so that a flicker phenomenon caused by fluctuation of the SPI data is avoided, picture display effect is optimized, and the technical problem of poor picture display effect of the backlight brightness after adjustment is solved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic terminal structure diagram of a hardware operating environment related to a backlight brightness adjustment method in an embodiment of the present application;
fig. 2 is a schematic terminal structure diagram of a hardware operating environment related to a backlight brightness adjustment method in another embodiment of the present application;
FIG. 3 is a schematic flowchart of an embodiment of a backlight brightness adjusting method according to the present application;
FIG. 4 is a schematic flow chart illustrating another embodiment of a backlight brightness adjusting method according to the present application;
fig. 5 is a schematic structural diagram of a backlight brightness adjusting device in an embodiment of the present application.
The objectives, features, and advantages of the present application will be further described with reference to the accompanying drawings.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, fig. 1 is a schematic terminal structure diagram of a hardware operating environment according to an embodiment of the present invention.
The terminal of the embodiment of the invention is a television.
As shown in fig. 1, the terminal may include: a processor 1001, such as a CPU, MCU, etc., a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Optionally, the terminal may further include a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WiFi module, and the like. Such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display screen according to the brightness of ambient light, and a proximity sensor that may turn off the display screen and/or the backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), detect the magnitude and direction of gravity when the mobile terminal is stationary, and can be used for applications (such as horizontal and vertical screen switching, related games, magnetometer attitude calibration), vibration recognition related functions (such as pedometer and tapping) and the like for recognizing the attitude of the mobile terminal; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which are not described herein again.
Optionally, referring to fig. 2, in another embodiment of the terminal structure of the hardware operating environment according to an embodiment of the present invention, the television includes a constant current driving unit 100, a main board 200, a backlight 300, and a Power supply 400, where the constant current driving unit 100 includes a processor, a memory, and a constant current driving IC, the processor is an MCU, the memory is not shown in the drawing, the memory may include a backlight brightness adjustment application program, the MCU may be configured to call the backlight brightness adjustment application program stored in the memory 1005, and execute the steps of the backlight brightness adjustment method described below, the main board 200 at least includes an SOC, and may further include a TCON (Timing controller), a Power amplifier, and the like, the SOC transmits backlight brightness data and a backlight control signal to the MCU, so that the MCU adjusts the brightness of the backlight 300 based on the backlight brightness data and the backlight control signal, and the Power supply 400 may include a transformer, a feedback current, an LLC circuit (resonant circuit), a PFC (Power Factor Correction) circuit, a Power Factor Correction (rectification) circuit, an EMI (Electromagnetic Interference) circuit, an Electromagnetic Interference circuit, and the like.
Those skilled in the art will appreciate that the terminal configurations shown in fig. 1 and 2 are not intended to be limiting of the terminal, and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is one type of computer storage medium, may include an operating system, a network communication module, a user interface module, and a backlight brightness adjustment application program therein.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to invoke a backlight brightness adjustment application stored in the memory 1005 and perform the following operations:
receiving backlight brightness data sent by a main board;
if the current brightness is determined to be in the brightness automatic adjusting mode, determining a current amplitude value corresponding to the backlight lamp according to the backlight brightness data and a preset current set value;
adjusting the brightness of the backlight based on the current amplitude and the backlight brightness data.
Further, the processor 1001 may call a backlight brightness adjustment application stored in the memory 1005, and also perform the following operations:
if the current brightness is determined to be in the automatic brightness adjusting mode, determining a backlight brightness total value according to the backlight brightness data;
and if the total backlight brightness value is smaller than a preset brightness data threshold, increasing and adjusting a preset current set value according to the total backlight brightness value and the brightness data threshold to obtain a current amplitude corresponding to the backlight.
Further, the processor 1001 may call a backlight brightness adjustment application stored in the memory 1005, and also perform the following operations:
determining the ratio of the total backlight brightness value to the brightness data threshold value as a gain coefficient;
and increasing and adjusting a preset current set value according to the gain coefficient to obtain a current amplitude value corresponding to the backlight lamp.
Further, the processor 1001 may call a backlight brightness adjustment application stored in the memory 1005, and also perform the following operations:
and if the total backlight brightness value is greater than or equal to a preset brightness data threshold, determining a preset current set value as a current amplitude value corresponding to the backlight lamp.
Further, the processor 1001 may call the backlight brightness adjustment application program stored in the memory 1005, and further perform the following operations:
judging whether target brightness data smaller than a preset brightness lower limit exist in the backlight brightness data or not;
if it is determined that target brightness data smaller than a preset brightness lower limit exists in the backlight brightness data, a target backlight lamp corresponding to the target brightness data is determined, the brightness of the target backlight lamp is adjusted based on a preset current set value and the target backlight brightness data, and the brightness of other backlight lamps except the target backlight lamp is adjusted based on the current amplitude and the backlight brightness data.
Further, the processor 1001 may call a backlight brightness adjustment application stored in the memory 1005, and also perform the following operations:
and if the backlight lamp is determined not to be in the automatic brightness adjusting mode currently, adjusting the brightness of the backlight lamp based on a preset current set value.
In a first embodiment of the backlight brightness adjusting method according to the present application, referring to fig. 3, the backlight brightness adjusting method applied to a constant current driving unit includes the following steps:
step S10, receiving backlight brightness data sent by a main board;
in this embodiment, it should be noted that the backlight brightness adjusting method is applicable to an LED display based on a Local dimming (Local dimming) technology, and the backlight brightness adjusting method is applied to a constant current driving unit, where the constant current driving unit is an LED (light-emitting diode) constant current driving chip, and since an LED is a semiconductor device with sensitive characteristics and has a negative temperature characteristic, it is necessary to perform stable working state and protection during an application process, so as to generate a driving concept, the constant current driving unit and a main board transmit backlight brightness data through an SPI signal, the backlight brightness data is SPI data, which is a ratio of a current value required by a current frame to a maximum current value, and is used for adjusting the brightness of a backlight by adjusting the current value required by the current frame, and an MCU in the constant current driving unit configures a current amplitude value for a constant current driving IC, and further determines an actual current value in the constant current driving IC based on the backlight brightness data and the configured current amplitude value, so as to adjust the brightness of the backlight.
Specifically, the SPI data sent by the SOC in the motherboard is received, and the backlight luminance data is obtained by analyzing the SPI data, and it is easily understood that the backlight luminance data corresponds to the luminance adjustment channel of the backlight, that is, if the backlight is adjusted by the luminance of more than one luminance adjustment channel, the backlight luminance data may be multiple.
Step S20, if the current brightness is determined to be in the brightness automatic adjusting mode, determining a current amplitude corresponding to the backlight lamp according to the backlight brightness data and a preset current set value;
in this embodiment, specifically, a switch control signal of an automatic brightness adjustment mode sent by a motherboard is obtained, whether the automatic brightness adjustment mode is currently located is determined according to the switch control signal of the automatic brightness adjustment mode, if a control signal for starting the automatic brightness adjustment mode is identified, the automatic brightness adjustment mode is determined to be currently located, and further, according to the backlight brightness data and a preset current setting value, a current amplitude value configured in a constant current driving IC is determined, so that the constant current driving IC adjusts the brightness of the backlight based on the current amplitude value, where the preset current setting value is an initial setting value of the current amplitude value, and may be set according to an actual situation, a power threshold value, and the like, which is not limited in this embodiment, and the current amplitude value may be greater than or less than the preset current setting value, for example, if the backlight brightness data is too large and there is a risk of overpower, the risk of overpower can be avoided by reducing the current amplitude, if the backlight brightness data is too small, a sudden change of current can be caused, and a sudden change of the image from larger brightness to smaller brightness can be caused, and a flicker phenomenon can be caused, and the image brightness can be improved by increasing the current amplitude, and the flicker phenomenon can be avoided, for example, the previous frame backlight brightness data is 100%, the next frame backlight brightness data is 20%, if the current amplitude is fixed to 100mA, the previous frame backlight lamp current is 100mA, the next frame backlight lamp current is 20mA, the current is suddenly changed, and the brightness is also suddenly changed, if the previous frame current amplitude is fixed to 100mA, and the next frame current amplitude is 300mA, the previous frame backlight lamp current is 100mA, the next frame backlight lamp current is 60mA, compared with the fixed current amplitude, the change of current is smaller, the variation in brightness is also smaller.
The automatic brightness adjustment mode is a mode for automatically adjusting the brightness of the backlight, and in an implementable manner, the automatic brightness adjustment mode may be an HDR mode, or a novel switch control mode of the automatic brightness adjustment mode may be associated with a switch control signal of the HDR mode, if a control signal for turning on the HDR mode is recognized, the automatic brightness adjustment mode is automatically turned on to generate a control signal for turning on the automatic brightness adjustment mode, and if a control signal for turning off the HDR mode is recognized, the automatic brightness adjustment mode is automatically turned off to generate a control signal for turning off the automatic brightness adjustment mode.
It should be noted that, the manner of determining the current amplitude corresponding to the backlight lamp according to the backlight brightness data and the preset current setting value may be to adjust the preset current setting value according to a magnitude relationship between a sum of the backlight brightness data and a preset data threshold value to obtain the current amplitude corresponding to the backlight lamp, or may be to adjust the preset current setting value according to a sum of the backlight brightness data of a part of channels and a preset data threshold value to obtain the current amplitude corresponding to the backlight lamp, or may be to adjust the preset current setting value according to a magnitude relationship between the backlight brightness data of a certain channel and a preset data threshold value to obtain the current amplitude corresponding to the backlight lamp, where the preset data threshold value may be determined according to an actual situation, and this embodiment is not limited.
If the control signal for turning off the brightness automatic adjusting mode is identified, the current brightness automatic adjusting mode is determined not to be in, and the current brightness automatic adjusting mode is determined not to be in, so that the brightness of the backlight lamp does not need to be adjusted.
Optionally, after the step of receiving the backlight brightness data sent by the main board, the method further includes:
and if the backlight lamp is determined not to be in the automatic brightness adjusting mode currently, adjusting the brightness of the backlight lamp based on a preset current set value.
In this embodiment, specifically, an on-off control signal of the brightness automatic adjustment mode sent by the motherboard is obtained, whether the current is in the brightness automatic adjustment mode is determined according to the on-off control signal of the brightness automatic adjustment mode, and if the control signal for turning off the brightness automatic adjustment mode is identified, the brightness of the backlight is adjusted based on a preset current setting value.
And S30, adjusting the brightness of the backlight lamp based on the current amplitude and the backlight brightness data.
In this embodiment, specifically, the MCU sends the current amplitude and the backlight brightness data to a constant current driving IC, so that the constant current driving IC calculates and determines an actual current value based on the backlight brightness data and the current amplitude, and adjusts the brightness of the backlight lamp based on the actual current value.
Optionally, the adjusting the brightness of the backlight based on the current amplitude and the backlight brightness data comprises:
step S31, judging whether target brightness data smaller than a preset brightness lower limit exist in the backlight brightness data;
step S32, if it is determined that target brightness data smaller than a preset brightness lower limit exists in the backlight brightness data, determining a target backlight corresponding to the target brightness data, adjusting the brightness of the target backlight based on a preset current set value and the target backlight brightness data, and adjusting the brightness of other backlights except the target backlight based on the current amplitude and the backlight brightness data.
In this embodiment, specifically, a smaller luminance lower limit is preset, the backlight luminance data is compared with the luminance lower limit one by one, whether target luminance data smaller than the preset luminance lower limit exists in the backlight luminance data is judged, if the target luminance data smaller than the preset luminance lower limit does not exist in the backlight luminance data, the MCU sends the current amplitude and the backlight luminance data to a constant current driving IC, so that the constant current driving IC calculates and determines an actual current value based on the backlight luminance data and the current amplitude, and adjusts the luminance of the backlight based on the actual current value; if target brightness data smaller than a preset brightness lower limit exists in the backlight brightness data, a target backlight corresponding to the target brightness data is determined, the MCU sends a preset current set value and the target backlight brightness data to the constant current drive IC, so that the constant current drive IC calculates and determines an actual current value of the target backlight based on the preset current set value and the target backlight brightness data, adjusts the brightness of the target backlight based on the actual current value of the target backlight, and sends the current amplitude and the backlight brightness data to the constant current drive IC, so that the constant current drive IC calculates and determines actual current values of other backlights except the target backlight based on the current amplitude and the backlight brightness data, and adjusts the brightness of other backlights except the target backlight based on the actual current values of other backlights except the target backlight, wherein the brightness lower limit can be determined according to actual needs, large data or actual test results, and the like, and the embodiment is not limited.
In this embodiment, different brightness adjustments are performed on different bright areas in the picture, the brightness enhancement processing is not performed on a darker area where the backlight brightness data is smaller than the preset brightness lower limit, and the brightness enhancement processing is performed on a brighter area where the backlight brightness data is larger than the preset brightness lower limit, so that the contrast between the dark portion and the bright portion in the picture can be increased.
In this embodiment, the backlight brightness adjusting method is applied to a constant current driving unit, and by receiving backlight brightness data sent by a main board, if it is determined that the backlight brightness data is currently in an automatic brightness adjusting mode, determining a current amplitude corresponding to a backlight according to the backlight brightness data and a preset current setting value, implementing dynamic adjustment of the current amplitude based on the backlight brightness data, and further adjusting the brightness of the backlight based on the current amplitude and the backlight brightness data, implementing auxiliary control of the process of adjusting the backlight brightness based on the backlight brightness data in the constant current driving unit, compared with a method of adjusting a fixed current maximum value based on SPI data, the method implements brightness adjustment of the backlight without calculating and processing SPI data in different windows and different scene picture switching processes by the main board, and only reading out required backlight brightness data in the corresponding picture, an MCU in the constant current driving unit configures a current amplitude, and further determines an actual current value in the driving IC based on the backlight brightness data and the configured current amplitude, and implements brightness adjustment of the backlight current when the backlight brightness data and the configured current amplitude change smoothly through the SPI data, wherein the backlight brightness data and the backlight brightness data are determined by the backlight brightness data and the current amplitude, and the current amplitude change smoothly and the backlight brightness data are associated with the SPI data, and the current amplitude, and the backlight brightness data are not changed suddenly, and the current amplitude change in the backlight brightness data, and the backlight brightness data are further, and the backlight brightness are monitored, and the backlight brightness are changed, and the current amplitude is changed in the backlight brightness is changed when the backlight brightness is changed, and the backlight brightness is changed smoothly, and the backlight brightness is changed, the method avoids the flicker phenomenon caused by the influence of the sudden change of the brightness data of the backlight, optimizes the picture display effect, and solves the technical problem of poor picture display effect after the brightness of the backlight is adjusted.
Further, in another embodiment of the backlight brightness adjusting method according to the present application, referring to fig. 4, if it is determined that the backlight is currently in the brightness automatic adjusting mode, the step of determining the current amplitude corresponding to the backlight according to the backlight brightness data and a preset current setting value includes:
step S21, if the current brightness is determined to be in the automatic brightness adjusting mode, determining a total backlight brightness value according to the backlight brightness data;
in this embodiment, specifically, a switch control signal of the brightness automatic adjustment mode sent by the main board is obtained, whether the display screen is currently in the brightness automatic adjustment mode is determined according to the switch control signal of the brightness automatic adjustment mode, if the control signal for starting the brightness automatic adjustment mode is identified, it is determined that the display screen is currently in the brightness automatic adjustment mode, backlight brightness DATA corresponding to all brightness adjustment channels are summed to obtain a backlight brightness total value, for example, if the current display screen is adjusted through n brightness adjustment channels, the backlight brightness DATA have n in total, and the backlight brightness total value S = DATA (1) +. + DATA (n).
And step S22, if the total backlight brightness value is smaller than a preset brightness data threshold, increasing and adjusting a preset current set value according to the total backlight brightness value and the brightness data threshold to obtain a current amplitude corresponding to the backlight.
In this embodiment, specifically, the total backlight brightness value is compared with a preset brightness DATA threshold, and whether the total backlight brightness value is smaller than a preset brightness DATA threshold is determined, if the total backlight brightness value is smaller than the preset brightness DATA threshold, a preset current setting value is increased and adjusted according to a numerical relationship between the total backlight brightness value and the brightness DATA threshold, so as to obtain a current amplitude value corresponding to the backlight, if the total backlight brightness value is smaller than the preset brightness DATA threshold, the brightness of the backlight may not be required to be adjusted, where the numerical relationship between the total backlight brightness value and the brightness DATA threshold may be a ratio of the total backlight brightness value to the brightness DATA threshold, a difference between the total backlight brightness value and the brightness DATA threshold, a functional relationship between the total backlight brightness value and the brightness DATA threshold, and the like, and the preset brightness DATA threshold may be determined according to actual conditions, big DATA, actual test results, and the like, which is not limited in this embodiment, in a practical manner, the preset brightness DATA threshold is a single-channel brightness DATA threshold of each channel, and is a single-channel DATA threshold, for example, the current brightness DATA threshold is adjusted through n + 1 — n + 1.
Optionally, the step of increasing and adjusting a preset current setting value according to the backlight brightness total value and the brightness data threshold to obtain a current amplitude corresponding to the backlight includes:
step S221, determining a ratio of the total backlight brightness value to the brightness data threshold as a gain coefficient;
step S222, increasing and adjusting a preset current setting value according to the gain coefficient to obtain a current amplitude corresponding to the backlight.
In this embodiment, specifically, a ratio of the total backlight brightness value to the brightness data threshold is calculated, the ratio of the total backlight brightness value to the brightness data threshold is determined as a gain coefficient, and a preset current setting value is multiplied by the gain coefficient, so that a current amplitude corresponding to the backlight after being increased and adjusted is obtained, where the current amplitude is greater than the preset current setting value, and therefore, the brightness of the backlight after being adjusted based on the current amplitude and the backlight brightness data is greater than the brightness of the backlight after being adjusted based on the preset current setting value and the backlight brightness data, so that the overall brightness of the backlight can be controlled in a larger brightness range under the condition of avoiding the power overload risk, for example, if the total backlight brightness value is X1, the preset current setting value I0 is a maximum current amplitude without the power overload risk, X1 is preset as the brightness data threshold, and if the total backlight brightness value is X2 (X2 is less than X1), the amplitude of X2 and I0 is less than the maximum current amplitude without the power overload risk, and the current amplitude is increased to the maximum power risk of the backlight can be ensured under the condition of increasing the power of the maximum power if the backlight is X2.
Optionally, after the step of determining the total backlight brightness value according to the backlight brightness data, the method further includes:
step S23, if the total backlight brightness value is greater than or equal to a preset brightness data threshold, determining a preset current setting value as a current amplitude corresponding to the backlight.
In this embodiment, specifically, the total backlight brightness value is compared with a preset brightness data threshold, and whether the total backlight brightness value is smaller than the preset brightness data threshold is determined, and if the total backlight brightness value is greater than or equal to the preset brightness data threshold, a preset current setting value is determined as the current amplitude corresponding to the backlight.
In this embodiment, the adjusted current amplitude is increased to be greater than the preset current setting value, so that the brightness of the backlight lamp adjusted based on the current amplitude and the backlight brightness data is greater than the brightness of the backlight lamp adjusted based on the preset current setting value and the backlight brightness data, and therefore the overall brightness of the backlight lamp can be controlled within a larger brightness range without exceeding the power for closing the brightness automatic adjustment mode, thereby increasing the current to improve the picture brightness, avoiding the flicker phenomenon caused by the fluctuation of the SPI data, optimizing the picture display effect, and having a smaller calculation amount by using the method for adjusting the backlight brightness by using the constant current driving unit.
Further, an embodiment of the present application also provides a backlight brightness adjusting device, and referring to fig. 5, the backlight brightness adjusting device is applied to a backlight brightness adjusting apparatus, and the backlight brightness adjusting device includes:
the receiving module 10 is configured to receive backlight brightness data sent by the main board;
a current amplitude determining module 20, configured to determine, if it is determined that the current mode is in an automatic brightness adjusting mode, a current amplitude corresponding to the backlight according to the backlight brightness data and a preset current setting value;
a backlight brightness adjusting module 30, configured to adjust the brightness of the backlight based on the current amplitude and the backlight brightness data.
Optionally, the current amplitude determination module 20 is further configured to:
if the current brightness is determined to be in the automatic brightness adjusting mode, determining a backlight brightness total value according to the backlight brightness data;
and if the total backlight brightness value is smaller than a preset brightness data threshold, increasing and adjusting a preset current set value according to the total backlight brightness value and the brightness data threshold to obtain a current amplitude corresponding to the backlight.
Optionally, the current amplitude determination module 20 is further configured to:
determining the ratio of the total backlight brightness value to the brightness data threshold value as a gain coefficient;
and increasing and adjusting a preset current set value according to the gain coefficient to obtain a current amplitude value corresponding to the backlight lamp.
Optionally, the current amplitude determination module 20 is further configured to:
and if the total backlight brightness value is greater than or equal to a preset brightness data threshold, determining a preset current set value as a current amplitude value corresponding to the backlight lamp.
Optionally, the backlight brightness adjusting module 30 is further configured to:
judging whether target brightness data smaller than a preset brightness lower limit exist in the backlight brightness data or not;
if it is determined that target brightness data smaller than a preset brightness lower limit exists in the backlight brightness data, determining a target backlight lamp corresponding to the target brightness data, adjusting the brightness of the target backlight lamp based on a preset current set value and the target backlight brightness data, and adjusting the brightness of other backlight lamps except the target backlight lamp based on the current amplitude and the backlight brightness data.
Optionally, the backlight brightness adjusting module 30 is further configured to:
and if the backlight lamp is determined not to be in the automatic brightness adjusting mode currently, adjusting the brightness of the backlight lamp based on a preset current set value.
The backlight brightness adjusting device provided by the invention adopts the backlight brightness adjusting method in the embodiment, and solves the technical problem of poor picture display effect after the brightness of the backlight is adjusted. Compared with the prior art, the beneficial effects of the backlight brightness adjusting device provided by the embodiment of the invention are the same as the beneficial effects of the backlight brightness adjusting method provided by the embodiment, and other technical features in the backlight brightness adjusting device are the same as the features disclosed by the embodiment method, which are not repeated herein.
Further, the present application also provides a computer program product, which comprises a computer program, when the computer program is executed by a processor, the steps of the backlight brightness adjusting method as described above are realized.
The computer program product provided by the application solves the technical problem that the picture display effect is poor after the brightness of the backlight lamp is adjusted. Compared with the prior art, the beneficial effects of the computer program product provided by the embodiment of the invention are the same as those of the backlight brightness adjusting method provided by the embodiment, and are not repeated herein.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all equivalent structures or equivalent processes, which are directly or indirectly applied to other related technical fields, and which are not limited by the present application, are also included in the scope of the present application.

Claims (10)

1. A backlight brightness adjusting method is applied to a constant current driving unit and comprises the following steps:
receiving backlight brightness data sent by a main board;
if the current brightness is determined to be in the brightness automatic adjusting mode, determining a current amplitude value corresponding to the backlight lamp according to the backlight brightness data and a preset current set value;
adjusting the brightness of the backlight based on the current amplitude and the backlight brightness data.
2. The method for adjusting brightness of a backlight according to claim 1, wherein the step of determining the current amplitude corresponding to the backlight according to the backlight brightness data and a preset current setting value if it is determined that the backlight is currently in the automatic brightness adjustment mode comprises:
if the current brightness is determined to be in the automatic brightness adjusting mode, determining a backlight brightness total value according to the backlight brightness data;
and if the total backlight brightness value is smaller than a preset brightness data threshold value, increasing and adjusting a preset current set value according to the total backlight brightness value and the brightness data threshold value to obtain a current amplitude value corresponding to the backlight lamp.
3. The method for adjusting the brightness of a backlight according to claim 2, wherein the step of increasing and adjusting a preset current setting value according to the total backlight brightness value and the brightness data threshold to obtain the current amplitude corresponding to the backlight comprises:
determining the ratio of the total backlight brightness value to the brightness data threshold value as a gain coefficient;
and increasing and adjusting a preset current set value according to the gain coefficient to obtain a current amplitude value corresponding to the backlight lamp.
4. The backlight brightness adjustment method according to claim 2, wherein the step of determining the total backlight brightness value according to the backlight brightness data further comprises:
and if the total backlight brightness value is greater than or equal to a preset brightness data threshold, determining a preset current set value as a current amplitude value corresponding to the backlight lamp.
5. The backlight brightness adjustment method according to claim 2, wherein the step of adjusting the brightness of the backlight based on the current amplitude and the backlight brightness data comprises:
judging whether target brightness data smaller than a preset brightness lower limit exist in the backlight brightness data or not;
if it is determined that target brightness data smaller than a preset brightness lower limit exists in the backlight brightness data, determining a target backlight lamp corresponding to the target brightness data, adjusting the brightness of the target backlight lamp based on a preset current set value and the target backlight brightness data, and adjusting the brightness of other backlight lamps except the target backlight lamp based on the current amplitude and the backlight brightness data.
6. The method for adjusting brightness of a backlight according to claim 1, wherein after the step of receiving the backlight brightness data transmitted by the main board, the method further comprises:
and if the backlight lamp is determined not to be in the automatic brightness adjusting mode currently, adjusting the brightness of the backlight lamp based on a preset current set value.
7. A backlight luminance adjusting apparatus, comprising:
the receiving module is used for receiving backlight brightness data sent by the main board;
the current amplitude determining module is used for determining the current amplitude corresponding to the backlight lamp according to the backlight brightness data and a preset current set value if the current amplitude determining module is determined to be in the brightness automatic adjusting mode;
and the backlight brightness adjusting module is used for adjusting the brightness of the backlight lamp based on the current amplitude and the backlight brightness data.
8. A television set is characterized by comprising a constant current driving unit, wherein the constant current driving unit comprises:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the steps of the backlight brightness adjustment method of any one of claims 1 to 6.
9. The television set of claim 8, further comprising a motherboard, a backlight, and a power supply, wherein,
the main board is used for sending backlight brightness data and a backlight control signal to the constant current driving unit so that the constant current driving unit can adjust the brightness of the backlight lamp based on the backlight brightness data and the backlight control signal.
10. A storage medium, characterized in that the storage medium is a computer-readable storage medium having stored thereon a program for implementing a backlight luminance adjusting method, the program being executed by a processor to implement the steps of the backlight luminance adjusting method according to any one of claims 1 to 6.
CN202211238176.1A 2022-10-10 2022-10-10 Backlight brightness adjusting method and device, television and storage medium Pending CN115578990A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211238176.1A CN115578990A (en) 2022-10-10 2022-10-10 Backlight brightness adjusting method and device, television and storage medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211238176.1A CN115578990A (en) 2022-10-10 2022-10-10 Backlight brightness adjusting method and device, television and storage medium

Publications (1)

Publication Number Publication Date
CN115578990A true CN115578990A (en) 2023-01-06

Family

ID=84584410

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211238176.1A Pending CN115578990A (en) 2022-10-10 2022-10-10 Backlight brightness adjusting method and device, television and storage medium

Country Status (1)

Country Link
CN (1) CN115578990A (en)

Similar Documents

Publication Publication Date Title
TWI428891B (en) Electronic apparatus and backlight brightness control method thereof
US8582034B2 (en) Adaptive screen color calibration
WO2020119240A1 (en) Backlight brightness adjustment method and liquid crystal display device
TW201930979A (en) Display device and corresponding regional dimming driving method
TWI482145B (en) Image display apparatus and backlight adjusting method thereof
US11328661B2 (en) Electronic device including display and method for operating the same
US10699675B2 (en) Methods, apparatus, and storage media for dimming a display screen
US20130093803A1 (en) Display control method, display control apparatus, liquid crystal display apparatus, display control program, and computer readable recording medium
WO2017113343A1 (en) Method for adjusting backlight brightness and terminal
WO2021082542A1 (en) Regional backlight control method, display, and storage medium
CN110148380B (en) Display picture adjusting method and device and storage medium
US11232757B2 (en) Backlight control method and device, and computer-readable storage medium for improving the contrast, restoring the image, and ensuring the distortion of the image
CN101394482A (en) CMOS image sensor and automatic exposure control method
CN108810614B (en) Volume adjustment method, system and readable storage medium
CN114999371A (en) Regional light control method, device, equipment and readable storage medium
US11551641B2 (en) Display apparatus and display method
CN113271422B (en) Brightness adjusting method and device, television and computer readable storage medium
JP2013225722A (en) Information processing device, display control method, and display control program
CN113703709A (en) Control method, circuit and device of independent display chip and electronic equipment
CN115578990A (en) Backlight brightness adjusting method and device, television and storage medium
CN104810007A (en) Image processing circuit and method
JP4588936B2 (en) Liquid crystal display device and automatic dimming control method thereof
CN113450700B (en) Display control method and device, display equipment and electronic equipment
CN114743520B (en) Mini-LED self-adaptive dimming method, device, equipment and medium
US11929001B2 (en) Method and device for measuring illuminance

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