CN116564243A - Brightness control method, display device and readable storage medium - Google Patents

Brightness control method, display device and readable storage medium Download PDF

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Publication number
CN116564243A
CN116564243A CN202310481699.7A CN202310481699A CN116564243A CN 116564243 A CN116564243 A CN 116564243A CN 202310481699 A CN202310481699 A CN 202310481699A CN 116564243 A CN116564243 A CN 116564243A
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Prior art keywords
time frame
pause
node
current time
interval
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CN202310481699.7A
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CN116564243B (en
Inventor
李建雷
袁海江
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HKC Co Ltd
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HKC Co Ltd
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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
    • G09G3/34—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
    • G09G3/36—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 using liquid crystals
    • 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
    • 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
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a brightness control method, a display device and a readable storage medium, and relates to the technical field of display.

Description

Brightness control method, display device and readable storage medium
Technical Field
The present invention relates to the field of display technologies, and in particular, to a brightness control method, a display device, and a readable storage medium.
Background
The display frequency conversion technology is a technology for realizing dynamic time frame switching by using industry standards such as DisplayPort (connection line) adaptive synchronization and the like by AMD (Advanced Micro Devices, ultra-Wei semiconductor company in the United states), and the dynamic time frame switching is used for synchronizing the refresh rate of a compatible display and the frame rate of a user display card, so that the input delay is shortened to the maximum extent, and the clamping generated during game playing and video playing is reduced or completely eliminated.
However, when the display frequency conversion technology dynamically switches between time frames with larger difference, the difference of pause intervals between the time frames is larger, so that the macroscopic display brightness difference exists during switching, and the flicker phenomenon exists in the display picture.
Disclosure of Invention
The invention mainly aims to provide a brightness control method, a display device and a readable storage medium, and aims to solve the technical problem that the existing display frequency conversion technology causes a flicker phenomenon of a display picture.
In order to achieve the above object, the present invention provides a brightness control method comprising the steps of:
determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame;
Detecting whether a quiescing node change exists in the current time frame compared with the previous time frame;
if the fact that the pause nodes in the current time frame are changed compared with the last time frame is detected, gamma voltage values respectively corresponding to the pause nodes in the current pause interval of the current time frame are adjusted according to the compensation values, and/or common reference voltages corresponding to the pause nodes in the current pause interval are adjusted, and display brightness of a display area output current time frame is changed.
Optionally, before the step of determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame, the method further comprises:
in the process of carrying out refresh rate identification on the previous time frame through a central control board, when a subsequent node of the last pause node in the previous time frame is identified as a newly added pause node in the previous time frame, determining the subsequent node as a new last pause node;
and confirming the current refresh rate of the previous time frame according to the new last pause node, and continuously executing the process of identifying the target refresh rate of the previous time frame after determining the current compensation value based on the current refresh rate.
Optionally, the step of determining the compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame includes:
in the process of identifying the target refresh rate of the previous time frame through the central control board, when the subsequent node of the last pause node in the previous time frame is identified as the initial node of the current time frame, determining the current refresh rate of the previous time frame as the target refresh rate;
and after the compensation value is determined according to the target refresh rate, ending the process of identifying the target refresh rate of the previous time frame.
Optionally, after the step of detecting whether there is a quiescing node change in the current time frame compared to the previous time frame, the method further comprises:
and if the current time frame is detected to have no pause node change compared with the previous time frame, setting the gamma voltage value of each pause node included in the current time frame as the compensation value.
Optionally, the step of adjusting the gamma voltage value corresponding to each pause node in the current pause interval of the current time frame according to the compensation value and adjusting the common reference voltage corresponding to the pause node in the current pause interval, and changing the display brightness of the display area output current time frame includes:
Setting the gamma voltage value of each pause node in a first pause interval to be the compensation value and keeping the gamma voltage value of the pause node in a second pause interval to be the initial gamma voltage value under the condition that the pause nodes are detected to be increased in the current time frame compared with the previous time frame, wherein the pause interval of the current time frame consists of the first pause interval and the second pause interval, the first pause interval is the same as the pause interval of the previous time frame, and the second pause interval consists of the increased pause nodes;
and adjusting the public reference voltage corresponding to the pause node in the second pause interval to increase the display brightness of the display area output current time frame.
Optionally, the step of adjusting the common reference voltage corresponding to the quiescing node in the second quiescing interval includes:
and identifying a subsequent node of the second pause interval through a central control board, and adjusting a public reference voltage corresponding to the newly added pause node when the subsequent node is identified as the newly added pause node of the second pause interval, so that the display area is capacitively coupled.
Optionally, the step of adjusting the common reference voltage corresponding to the quiescing node in the second quiescing interval includes:
identifying a subsequent node of the second pause interval through a central control board, and determining an adjusted common reference voltage corresponding to the last pause node in the second pause interval as a final coupling voltage when the subsequent node is identified as an initial node of a next time frame;
and controlling the display area to generate capacitive coupling based on the final coupling voltage, and lifting the display area to output the display brightness of the current time frame.
Optionally, the step of adjusting the gamma voltage values corresponding to each pause node in the current pause interval of the current time frame according to the compensation value includes:
setting the gamma voltage value of each pause node included in the current time frame as the compensation value under the condition that the current time frame is detected to have fewer pause nodes compared with the previous time frame;
after the step of setting the gamma voltage value of each pause node included in the current time frame to the compensation value, the method further includes:
And under the condition that no pause node change exists in the next time frame compared with the current time frame, the gamma voltage value of each pause node included in the next time frame is kept to be the initial gamma voltage value.
In addition, in order to achieve the above object, the present invention also provides a display device, including a memory, a processor, and a computer processing program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned brightness control method when executing the computer processing program.
In addition, in order to achieve the above object, the present invention also provides a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements the steps of the above-described brightness control method.
According to the invention, the compensation value for compensating the gamma voltage value of the current time frame is determined based on the target refresh rate of the previous time frame, so that the gray scale voltage for compensating the current time frame is determined, the condition that the brightness difference is large due to large gray scale voltage difference when the previous time frame is switched to the current time frame is avoided, whether the pause node change exists in the current time frame compared with the previous time frame is detected, if the pause node change exists in the current time frame compared with the previous time frame is detected, the gamma voltage value corresponding to each pause node in the current pause interval of the current time frame is adjusted according to the compensation value and/or the common reference voltage corresponding to each pause node in the current pause interval is adjusted, the display brightness difference caused by large gamma voltage value difference existing between the previous time frame and the current time frame can be avoided, the display brightness phenomenon can be further avoided by adjusting the common reference voltage value corresponding to the pause node in the current pause interval, so that the display area is capacitively coupled, the data voltage is changed, and the display brightness of the current time frame is further output in the display area is changed, and flicker compensation is further performed.
Drawings
FIG. 1 is a schematic diagram of a terminal structure of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a first embodiment of a brightness control method according to the present invention;
FIG. 3 is a schematic diagram of a driving circuit of a display area;
FIG. 4 is a flowchart of a second embodiment of the brightness control method according to the present invention;
FIG. 5 is a flowchart of a third embodiment of a brightness control method according to the present invention;
FIG. 6 is a schematic diagram of a current time frame with increased quiescing nodes compared to a previous time frame;
FIG. 7 is a schematic diagram of a pixel architecture;
FIG. 8 is a diagram illustrating a reduced number of quiescing nodes in a current time frame as compared to a previous time frame;
FIG. 9 is a diagram of a current time frame without a quiescing node change as compared to a previous time frame.
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, fig. 1 is a schematic diagram of a terminal structure of a hardware running environment according to an embodiment of the present invention.
In the embodiment of the invention, the application carrier of the brightness control method is a display device, as shown in fig. 1, the display device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display area (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further 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 stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
Optionally, the display device may further include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and the like. Among other sensors, 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 moves to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the acceleration in all directions (generally three axes), and can detect the gravity and the direction when the mobile terminal is stationary, and the mobile terminal can be used for recognizing the gesture of the mobile terminal (such as horizontal and vertical screen switching, related games, magnetometer gesture calibration), vibration recognition related functions (such as pedometer and knocking), and the like; of course, the mobile terminal may also be configured with other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, an infrared sensor, and the like, which are not described herein.
It will be appreciated by those skilled in the art that the display device structure shown in fig. 1 is not limiting of the display device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a computer processing program may be included in the memory 1005, which is a type of computer storage medium.
In the terminal shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server and performing data communication with the background 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 call a computer processing program stored in the memory 1005 and perform the following operations:
determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame;
detecting whether a quiescing node change exists in the current time frame compared with the previous time frame;
if the fact that the pause nodes in the current time frame are changed compared with the last time frame is detected, gamma voltage values respectively corresponding to the pause nodes in the current pause interval of the current time frame are adjusted according to the compensation values, and/or common reference voltages corresponding to the pause nodes in the current pause interval are adjusted, and display brightness of a display area output current time frame is changed.
Further, the processor 1001 may call a computer program stored in the memory 1005, and further perform the following operations:
before the step of determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame, determining a subsequent node of a last pause node in the previous time frame as a new pause node in the previous time frame when the subsequent node is identified as the new pause node in the previous time frame in the process of carrying out refresh rate identification on the previous time frame through a central control board;
and confirming the current refresh rate of the previous time frame according to the new last pause node, and continuously executing the process of identifying the target refresh rate of the previous time frame after determining the current compensation value based on the current refresh rate.
Further, the processor 1001 may call a computer program stored in the memory 1005, and further perform the following operations:
a step of determining a compensation value for compensating for the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame, comprising: in the process of identifying the target refresh rate of the previous time frame through the central control board, when the subsequent node of the last pause node in the previous time frame is identified as the initial node of the current time frame, determining the current refresh rate of the previous time frame as the target refresh rate;
And after the compensation value is determined according to the target refresh rate, ending the process of identifying the target refresh rate of the previous time frame.
Further, the processor 1001 may call a computer program stored in the memory 1005, and further perform the following operations:
after the step of detecting whether the pause node is changed in the current time frame compared with the previous time frame, if the step of detecting that the pause node is not changed in the current time frame compared with the previous time frame, setting the gamma voltage value of each pause node included in the current time frame as the compensation value.
Further, the processor 1001 may call a computer program stored in the memory 1005, and further perform the following operations:
the step of adjusting gamma voltage values respectively corresponding to pause nodes in a current pause interval of the current time frame and adjusting common reference voltages corresponding to the pause nodes in the current pause interval according to the compensation values, and changing display brightness of a display area output current time frame comprises the following steps: setting the gamma voltage value of each pause node in a first pause interval to be the compensation value and keeping the gamma voltage value of the pause node in a second pause interval to be the initial gamma voltage value under the condition that the pause nodes are detected to be increased in the current time frame compared with the previous time frame, wherein the pause interval of the current time frame consists of the first pause interval and the second pause interval, the first pause interval is the same as the pause interval of the previous time frame, and the second pause interval consists of the increased pause nodes;
And adjusting the public reference voltage corresponding to the pause node in the second pause interval to increase the display brightness of the display area output current time frame.
Further, the processor 1001 may call a computer program stored in the memory 1005, and further perform the following operations:
the step of adjusting the common reference voltage corresponding to the quiescing node in the second quiescing interval includes: and identifying a subsequent node of the second pause interval through a central control board, and adjusting a public reference voltage corresponding to the newly added pause node when the subsequent node is identified as the newly added pause node of the second pause interval, so that the display area is capacitively coupled.
Further, the processor 1001 may call a computer program stored in the memory 1005, and further perform the following operations:
the step of adjusting the common reference voltage corresponding to the quiescing node in the second quiescing interval includes: identifying a subsequent node of the second pause interval through a central control board, and determining an adjusted common reference voltage corresponding to the last pause node in the second pause interval as a final coupling voltage when the subsequent node is identified as an initial node of a next time frame;
And controlling the display area to generate capacitive coupling based on the final coupling voltage, and lifting the display area to output the display brightness of the current time frame.
Further, the processor 1001 may call a computer program stored in the memory 1005, and further perform the following operations:
the step of adjusting gamma voltage values respectively corresponding to each pause node in the current pause interval of the current time frame according to the compensation value comprises the following steps: setting the gamma voltage value of each pause node included in the current time frame as the compensation value under the condition that the current time frame is detected to have fewer pause nodes compared with the previous time frame;
after the step of setting the gamma voltage value of each pause node included in the current time frame to the compensation value, if it is detected that the next time frame has no pause node change compared with the current time frame, the gamma voltage value of each pause node included in the next time frame is kept to be the initial gamma voltage value.
Referring to fig. 2, fig. 2 is a flowchart of a first embodiment of the brightness control method of the present invention, the brightness control method comprising the steps of:
Step S10, determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame.
The display frequency conversion technology changes the length of a time frame by changing the number of time lines of a pause interval, namely, changing the refresh rate, and the change of the length of the time frame is detected by an LCD (Liquid Crystal Display ) time sequence control and a TCON (timing controller, data processing chip), specifically, the TCON confirms how much the target refresh rate corresponds to the time frame by detecting the pause interval of the time frame, the display intervals at different refresh rates are the same, the longer the pause interval is, the larger the leakage current is, the larger the gray level voltage variation is, the lower the refresh rate is, the larger the brightness difference is, specifically, taking an experiment of brightness variation of 144Hz to 48Hz as an example, when the time frame is switched from 144Hz to 48Hz, the display brightness is gradually reduced, so in order to avoid the problem that the display brightness difference is large and the display effect is poor due to obvious brightness fluctuation when the gray level voltage is switched from different time frames, the embodiment proposes to adjust the gray level voltage so as to avoid the gray level voltage of the current time frame from being capable of attaching to the gray level voltage of the previous time frame, thereby avoiding the situation that the gray level voltage difference is large.
Referring to fig. 3, the gray-scale voltage is determined based on the gamma voltage, the Power chip outputs the VAA voltage to the GM chip, the GM chip generates Vref after stabilizing the VAA voltage, the Vref is equally divided into 10 bits, that is 1024 parts, the GM chip transmits the 2-ary command through the I2C according to TCON to DAC the Vref and outputs the Vref as 14 groups of gamma voltages (that is, GM1-GM14 in fig. 3), the 14 groups of gamma voltages are given to the Driver, the Driver actively divides the gamma voltages through the resistor string (that is, R in fig. 3) to the DAC 8 bit-256 decoder to generate 256 x 2 (positive and negative gray-scale) gray-scale voltages, and the gray-scale DAC determined based on the Data given by TCON is converted into the Data voltage based on the positive and negative of the POL determination given by TCON and is sent to the in-plane for display.
Therefore, in this embodiment, the target refresh rate corresponding to each time frame is determined by detecting the pause node in the pause interval corresponding to each time frame, specifically, TCON receives display data, detects the pause node in the previous time frame based on the previous time frame in the display data, and determines the refresh rate of the previous time frame, because the determination of the refresh rate of the time frame is determined based on the size of the pause interval of the time frame, each pause node in the pause interval of the previous time frame needs to be determined until the last pause node is determined, the target refresh rate is determined based on the last pause node, and the gamma voltage value of the gamma voltage output by the DAC is controlled to be changed based on the gamma voltage value corresponding to the target refresh rate, and the changed gamma voltage value is determined as a compensation value for compensating the current time frame, and the compensation value is output to the current time frame for execution, so that when the previous time frame is switched to the current time frame, the problem of obvious dark-bright conversion caused by large gray-scale voltage difference can be avoided.
Because the detection of the last quiesce node is compared with the subsequent nodes of each quiesce node, when the detected subsequent nodes are still in the quiesce interval of the previous time frame, namely, the subsequent nodes are newly added quiesce nodes of the previous time frame, the subsequent nodes are temporarily determined to be new last quiesce nodes, after the determination of the compensation value is carried out based on the new last quiesce nodes, whether the subsequent nodes based on the new last quiesce nodes are still in the quiesce interval of the previous time frame is continuously detected, if the subsequent nodes based on the new last quiesce nodes are still in the quiesce interval of the previous time frame, the subsequent nodes based on the new last quiesce nodes are updated to be new last quiesce nodes; if the node is not in the pause interval of the previous time frame, but is the initial node of the current time frame, the new last pause node is determined as the target pause node, and the gamma voltage value corresponding to the target pause node is determined as the compensation value for compensating the gamma voltage value of the current time frame, and it is required to determine the last pause node and the compensation value of each pause node in the time frame.
Step S20, detecting whether there is a quiescing node change in the current time frame compared to the previous time frame.
After determining the compensation value for compensating the current time frame based on step S10, it is required to detect whether there is a change in the quiescing node between the current time frame and the previous time frame, because after determining the compensation value for compensating the current time frame, the refresh rate of the previous time frame is determined, and the determination of the refresh rate indicates that the quiescing node on the quiescing interval of the previous time frame is determined, so that at this time, by comparing the quiescing node added in real time to the quiescing interval of the current time frame with the quiescing node included in the previous time frame, it is determined whether there is a difference between the quiescing node added in real time to the quiescing node included in the previous time frame, thereby determining whether there is a change in the refresh rate when the previous time frame is switched to the current time frame.
Step S30, if it is detected that the pause node of the current time frame is changed compared with the previous time frame, gamma voltage values respectively corresponding to the pause nodes in the current pause interval of the current time frame are adjusted according to the compensation value and/or common reference voltages corresponding to the pause nodes in the current pause interval are adjusted, and display brightness of the current time frame output by a display area is changed.
If it is detected that the refresh rate is changed when the previous time frame is switched to the current time frame, the display brightness of the current time frame output by the display area is changed according to a preset brightness control strategy, so that the brightness variation between the display brightness when the current time frame is output by the display area and the display brightness when the previous time frame is output is smaller than or equal to a preset variation, that is, the brightness difference between the display brightness when the current time frame is output by the display area and the display brightness when the previous time frame is output is small, so as to avoid a display flicker phenomenon caused by large brightness difference, wherein the preset brightness control strategy is to adjust gamma voltage values corresponding to each pause node in the current pause interval of the current time frame respectively according to a compensation value and/or adjust a common reference voltage corresponding to the pause node in the current pause interval, the preset variation is a numerical value which is set by the brightness switching condition of a display picture perceived by human eyes and can represent smooth brightness display, the brightness variation is larger than the numerical value to indicate that the display picture has a flicker phenomenon, and the brightness variation is smaller than or equal to the numerical value indicates that the brightness difference is small or has no brightness difference.
Specifically, the preset brightness control policy is to compensate the gamma voltage value of each pause node in the current time frame according to the compensation value determined based on the previous time frame, so that the brightness change in the switching process of the previous time frame to the current time frame is gentle, and the display flicker phenomenon caused by large brightness change difference can be avoided, and meanwhile, the common reference voltage corresponding to the pause node in the current pause interval is adjusted.
In this embodiment, a compensation value for compensating a gamma voltage value of a current time frame is determined based on a target refresh rate of a previous time frame, so as to determine a gray scale voltage for compensating the current time frame, avoid a situation that a brightness difference is large due to a large gray scale voltage difference when the previous time frame is switched to the current time frame, detect whether a pause node change exists in the current time frame compared with the previous time frame, if it is detected that the pause node change exists in the current time frame compared with the previous time frame, adjust gamma voltage values respectively corresponding to pause nodes in a current pause interval of the current time frame and/or adjust a common reference voltage corresponding to pause nodes in the current pause interval according to the compensation value, and further compensate display brightness by adjusting gamma voltage values respectively corresponding to pause nodes in the current pause interval of the current time frame.
Referring to fig. 4, fig. 4 is a flowchart illustrating a second embodiment of the brightness control method of the present invention, and before the step of determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame in step S10, the method further includes:
step A10, in the process of carrying out refresh rate identification on the previous time frame through a central control board, when a subsequent node of the last pause node in the previous time frame is identified as a newly added pause node in the previous time frame, determining the subsequent node as the new last pause node;
and step A20, confirming the current refresh rate of the previous time frame according to the new last pause node, and continuously executing the process of identifying the target refresh rate of the previous time frame after determining the current compensation value based on the current refresh rate.
Taking the previous time frame as an a time frame, the current time frame as a b time frame as an example, the signal source SOC transmits each time frame to the TCON, the TCON receives and processes the time frames line by line, the TCON processes the time frames according to the sequence of each time frame, for example, the time frames received by the TCON are the a time frame and the b time frame, then the TCON firstly processes the a time frame, after the TCON firstly processes the display interval of the a time frame, then enters the pause interval of the a time frame to determine the refresh rate, because the refresh rate is implemented, the TCON needs to directly and temporarily determine the pause node as the last pause node after detecting each newly added pause node, and determine the compensation value for compensating the gamma voltage value of the b time frame based on the refresh rate corresponding to the last pause node until the subsequent node which identifies the new pause node of the a time frame is the initial node of the b time frame is identified in the process of identifying the pause node of the a time frame, the refresh rate of the a time frame is determined to be the final pause node of the b time frame, and the final pause node which is the final compensation value is determined according to the pause target pause node which is the final pause value of the final pause node of the b time frame.
For example, when the TCON starts to detect the pause interval of the a-time frame, the TCON detects the first pause node generated in the pause interval of the a-time frame, after temporarily confirming the first pause node as the last pause node, determines the compensation value 1 for compensating the gamma voltage value of the b-time frame based on the refresh rate (assumed to be 144 Hz) corresponding to the first pause node, detects the node which appears subsequently to the first pause node, when detecting the node which appears subsequently as the second pause node which is newly added in the pause interval of the a-time frame, temporarily confirms the second pause node as the last pause node, determines the refresh rate corresponding to the second pause node based on the refresh value 2 for compensating the gamma voltage value of the b-time frame (assumed to be 120 Hz), continues to detect the node which appears subsequently to the second pause node (what needs to be explained is required) after temporarily confirming the last pause node which is new, namely, the first pause node will not be the last pause node, namely one pause interval is one pause node, and when detecting the next pause node is the second pause node, determines the refresh value of the b-time frame based on the refresh value of the last pause node, determines the refresh value of the b-time frame based on the refresh value of the last pause node, and determines the refresh value of the b-time frame based on the refresh value of the last pause node which is directly increased on the last pause node, and determines the refresh value of the pause node based on the last pause node, there is a case where the determined compensation value is based on an error refresh rate higher than the original refresh rate of the a time frame, so that the compensation of the current time frame due to the excessive compensation of the compensation value has low accuracy, and the luminance difference cannot be eliminated.
Optionally, the step of determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame in step S10 includes:
step A30, in the process of identifying the target refresh rate of the previous time frame through the central control board, when the subsequent node of the last pause node in the previous time frame is identified as the initial node of the current time frame, determining the current refresh rate of the previous time frame as the target refresh rate;
and step A40, after the compensation value is determined according to the target refresh rate, ending the process of identifying the target refresh rate for the previous time frame.
For example, when the TCON starts to detect the pause interval of the a time frame, a first pause node generated on the pause interval of the a time frame is detected first, after the first pause node is temporarily determined as the last pause node, a compensation value 1 for compensating the gamma voltage value of the b time frame is determined based on a refresh rate (assumed to be 144 Hz) corresponding to the first pause node, a node that appears after the first pause node is detected, when the node that appears after the first pause node is detected as the initial node of the b time frame, the first pause node is directly determined as a target pause node (i.e., a final end pause node) at this time, the target pause node is determined to be 144Hz, and a compensation value 1 for finally compensating the gamma voltage value of the b time frame is determined based on 144 Hz.
In this embodiment, in the process of performing refresh rate identification on the previous time frame by the central control board, when it is identified that a subsequent node of the last pause node in the previous time frame is a newly added pause node in the previous time frame, the subsequent node is determined to be the new last pause node, and after the current refresh rate of the previous time frame is confirmed according to the new last pause node, the process of performing target refresh rate identification on the previous time frame is continuously performed after the current refresh rate is determined based on the current refresh rate, so that accuracy of the compensation value is ensured, low accuracy of compensation on the current time frame caused by excessive compensation of the compensation value is avoided, and the situation that brightness difference cannot be eliminated is avoided.
Referring to fig. 5, fig. 5 is a flowchart illustrating a third embodiment of a brightness control method according to the present invention, in step S30, if it is detected that a pause node change exists in the current time frame compared with the previous time frame, then the step of adjusting gamma voltage values respectively corresponding to each pause node in a current pause interval of the current time frame and/or adjusting a common reference voltage corresponding to the pause node in the current pause interval according to the compensation value, and changing display brightness of a display area output the current time frame includes:
Step B10, setting the gamma voltage value of each pause node in a first pause interval as the compensation value and keeping the gamma voltage value of the pause node in a second pause interval as the initial gamma voltage value under the condition that the pause node increase of the current time frame compared with the previous time frame is detected, wherein the pause interval of the current time frame consists of the first pause interval and the second pause interval, the first pause interval is the same as the pause interval of the previous time frame, and the second pause interval consists of increased pause nodes;
and step B20, adjusting the public reference voltage corresponding to the pause node in the second pause interval to raise the display brightness of the display area output current time frame.
Taking fig. 6 as an example, assuming that the previous time frame is the a time frame (i.e. 2001, N1 and N2 in fig. 6), the current time frame is the b time frame (i.e. 2003, N1 to N4 in fig. 6), it can be seen that when it is detected that the b time frame has more pause nodes than the a time frame, i.e. the refresh rate corresponding to the b time frame is lower than the refresh rate corresponding to the a time frame, the pause nodes on the b time frame are divided into two pause sections, the pause nodes on the first pause section belong to the pause section on the a time frame, the pause nodes on the second pause section do not belong to the pause section on the a time frame, and, taking the pause sections [ N1, N2] consisting of N1 and N2 on the a time frame as an example shown in fig. 7, the pause sections [ N1, N2] on the a time frame exist, the pause nodes on the b time frame are the first pause section, and the pause nodes on the b time frame are the pause sections compared with the a time frame, the pause nodes on the b time frame are the new pause sections, and the pause nodes on the b time frame do not belong to the pause sections [ N1, N2] and the pause sections on the b time frame [ 3, N4] do not belong to the pause sections on the a time frame.
Since the first pause interval is the same as the pause interval of the a time frame, the gamma voltage values of all pause nodes in the first pause interval are set to the gamma voltage value of the N2 pause node in the a time frame, namely the compensation value OxB, and since the second pause interval is different from the pause interval of the a time frame, the pause nodes in the second pause interval are kept to be initial gamma voltage values, namely the gamma voltage value of the N3 pause node is OxC, the gamma voltage value of the N4 pause node is OxD, and meanwhile, when the gamma voltage value of the pause node in the second pause interval is kept to be initial gamma voltage value, the common reference voltage corresponding to each pause node is adjusted according to the increasing order of the pause nodes, wherein the initial gamma voltage value refers to the gamma voltage value originally corresponding to the pause node, for example, the gamma voltage value originally corresponding to the N1 pause node is OxA, and the gamma voltage value originally corresponding to the N2 pause node is OxB.
Specifically, when the newly added N3 pause node on the b time frame is detected, the gamma voltage value of the N3 pause node is kept to be the initial gamma voltage value, and at the same time, the common reference voltage corresponding to the N3 pause node is adjusted, so that the capacitor C1 and the capacitor C2 in fig. 8 are capacitively coupled due to the variation of the common reference voltage, further, the data voltage sent to the in-plane display is changed, the voltage when the a time frame is switched to the b time frame can be compensated, and the brightness of the display interval of the b time frame is compensated, so that the condition that the brightness is reduced when the display interval of the b time frame is output is avoided.
However, it should be noted that, when the common reference voltage corresponding to the N3 pause node is adjusted to compensate the brightness of the display interval of the output b time frame, that is, when the second pause interval of the b time frame is the second pause interval of the N3 pause node and the last pause node is the N3 pause node, after the data voltage for compensating the brightness of the display interval of the output b time frame (i.e., 2003 in fig. 6) is obtained based on the N3 pause node, when the second pause interval detects the newly added N4 pause node, the common reference voltage corresponding to the N4 pause node is adjusted to compensate the brightness of the display interval of the output b time frame, until the newly added node is detected to be not the newly added pause node of the second pause interval (i.e., the initial node 2004 of the next time frame is detected), the new data voltage corresponding to the N4 pause node is adjusted to compensate the brightness of the display interval of the output b time frame is taken as the final data voltage, so as to ensure the accuracy of compensating the brightness of the display interval of the output b time frame, wherein the newly added common reference voltage is the new data voltage.
According to fig. 7, the capacitor C1 is a liquid crystal capacitor, one end of the capacitor C1 is a Vcom voltage, the capacitor C2 is a storage capacitor, and one end of the capacitor C2 uses an Avcom, i.e. a common reference voltage, as an electrode, when the common reference voltage increases, the LCD pixel structure in fig. 7 redistributes charges, vcom is unchanged, and Avcom increases, so that a voltage difference between the capacitor C1 and the capacitor C2 increases, and a data voltage output into a plane is raised, so that brightness is pulled back when a display interval of a b time frame is output, and a display flicker phenomenon caused by brightness decrease when a high refresh rate is switched to a low refresh rate is avoided. The TFT is a switching thin film transistor, the input end of the switching thin film transistor is connected to the data line, and the output end of the switching thin film transistor is connected to the pixel driving line.
Optionally, the step of adjusting the common reference voltage corresponding to the quiescing node in the second quiescing interval in step B20 includes:
and step C10, identifying a subsequent node of the second pause interval through a central control board, and adjusting a public reference voltage corresponding to the newly added pause node when the subsequent node is identified as the newly added pause node of the second pause interval, so that the display area is capacitively coupled.
The accuracy of compensating the brightness of the display region when outputting the display section of the current time frame by adjusting the public reference voltage corresponding to the pause node is based on the last pause node newly added in the pause section of the previous time frame, but because the pause node in the second pause section is newly added in real time, the central control board cannot know the last newly added pause node in the second pause section in advance, and therefore, every time the newly added pause node in the second pause section is detected, the public reference voltage corresponding to the newly added pause node needs to be adjusted, so that the situation that a certain newly added pause node is the last newly added pause node in the second pause section is avoided, but the display section of the current time frame cannot be output in time due to the fact that the corresponding public reference voltage is not adjusted in real time.
Optionally, the step of adjusting the common reference voltage corresponding to the quiescing node in the second quiescing interval in step B20 includes:
and step C20, identifying a subsequent node of the second pause interval through a central control board, and determining the adjusted common reference voltage corresponding to the last pause node in the second pause interval as a final coupling voltage when the subsequent node is identified as an initial node of a next time frame.
And C30, controlling the display area to generate capacitive coupling based on the final coupling voltage, and lifting the display area to output the display brightness of the current time frame.
When the central control board identifies the subsequent node in the second pause interval, namely the newly added node is the initial node of the next time frame, the pause interval of the current time frame is confirmed, so that the public reference voltage corresponding to the last pause node in the second pause interval is determined to be the final coupling voltage.
Optionally, the step of adjusting the gamma voltage values corresponding to the respective pause nodes in the current pause interval of the current time frame according to the compensation value in step S30 includes:
step B30, setting the gamma voltage value of each pause node included in the current time frame as the compensation value under the condition that the pause node is detected to be reduced in the current time frame compared with the previous time frame;
after the step of setting the gamma voltage value of each pause node included in the current time frame to the compensation value, the method further includes:
step B40, when detecting that the pause node is not changed in the next time frame compared with the current time frame, maintaining the gamma voltage value of each pause node included in the next time frame as the initial gamma voltage value.
Taking fig. 8 as an example, assuming that the previous time frame is the a time frame (i.e. 2005, N1 and N2 in fig. 8), the current time frame is the b time frame (i.e. 2007 and N1 in fig. 8), the next time frame is the c time frame (i.e. 2009 and N1 in fig. 8), it can be seen that when the b time frame is detected to have a reduced pause node compared with the a time frame, i.e. the refresh rate of the a time frame is lower than the refresh rate of the b time frame, the pause nodes of the a time frame are N1 and N2, and the detected pause node of the b time frame is N1, the gamma voltage values of the N1 pause nodes on the b time frame are all set to be the gamma voltage values of the N2 pause nodes on the a time frame, i.e. the gamma voltage values of the N1 pause nodes on the b time frame are set to OxB.
Similarly, when it is detected that there is no pause node change in the c time frame compared to the b time frame, that is, 1 pause node (i.e., N1) exists in both the b time frame and the c time frame, the gamma voltage value of the N1 pause node on the c time frame needs to be kept at the initial gamma voltage value, that is, oxA, so as to ensure the accuracy of the output display brightness when the low refresh rate is converted into the high refresh rate, wherein 2005 is the display interval of the a time frame, 2006 is the initial node of the b time frame, 2007 is the display interval of the b time frame, 2008 is the initial node of the c time frame, 2009 is the display interval of the c time frame.
Optionally, after the step of detecting whether the current time frame has a quiescing node change compared to the previous time frame in step S20, the method further includes:
and step B40, if the current time frame is detected to have no pause node change compared with the previous time frame, setting the gamma voltage value of each pause node included in the current time frame as the compensation value.
Taking fig. 9 as an example, assuming that the previous time frame is a time frame (i.e. 2010, N1 and N2 in fig. 9), the current time frame is b time frame (i.e. 2012, N1 and N2 in fig. 9), the next time frame is c time frame (i.e. 2014, N1 and N2 in fig. 9), and as can be seen from the figure, when it is detected that there is no change in pause node in b time frame compared with a time frame, i.e. the refresh rate of a time frame and b time frame is the same, the present embodiment assumes 120Hz, and since the gamma voltage values of the pause nodes on b time frame in the present example are based on the number of pause nodes on a time frame, in particular, x pause nodes on a time frame are present, the gamma voltage values of the x pause nodes on b time frame are required to be set, and the gamma voltage values of the x pause nodes including the x pause node are required to be set, so as can be seen from fig. 9, when it is detected that there is no change in b time frame compared with a time frame, i.e. the refresh rate of a time frame and b time frame is the same, both pause node is 120Hz, and since the gamma voltage values on b time frame are present at b time frame and b time frame are both time frame are different from the gamma voltage values of 1, i.e. the gamma voltage values on b time frame is present at b time frame is different from x pause node, and N1, and gamma voltage is required to b time frame is present at 2.
Similarly, when it is detected that there is no pause node change in the c time frame compared to the b time frame, that is, 2 pause nodes (i.e., N1 and N2) are present in both the b time frame and the c time frame, then the gamma voltage values of both the N1 and N2 pause nodes in the c time frame are set to be the gamma voltage values of the N2 pause node in the b time frame, that is, the gamma voltage values of both the N1 and N2 pause nodes in the c time frame are set to be OxB, where 2010 is the display interval of the a time frame, 2011 is the initial node of the b time frame, 2012 is the display interval of the b time frame, 2013 is the initial node of the c time frame, and 2014 is the display interval of the c time frame.
Meanwhile, because the refresh rate in the time frame switching is constant, in order to avoid the situation that the saw tooth of the brightness waveform increases when the display area outputs the corresponding time frame caused by different conversion of the common reference voltage under the constant refresh rate, the common reference voltage corresponding to the pause node on the time frame corresponding to the constant refresh rate is not adjusted, namely, the capacitance on the display area under the constant refresh rate is not coupled and effective, so that the smoothness of the brightness output under the constant refresh rate is ensured.
In this embodiment, when it is detected that there are more pause nodes in the current time frame compared with the previous time frame, the gamma voltage value of each pause node in the first pause interval is set to be a compensation value, and the gamma voltage value of the pause node in the second pause interval is kept to be an initial gamma voltage value, where the pause interval of the current time frame is composed of the first pause interval and the second pause interval, the first pause interval is the same as the pause interval of the previous time frame, the second pause interval is composed of the more pause nodes, a display brightness difference caused by a larger difference in gamma voltage value between the previous time frame and the current time frame is avoided, a common reference voltage corresponding to the pause node in the second pause interval is adjusted to increase the display brightness of the current time frame output by the display area, so as to compensate the brightness when the display interval of the current time frame is output, a bright-dark difference caused by brightness decrease is avoided, and a display flicker phenomenon is further avoided.
In addition, the embodiment of the invention also provides a display device, which comprises a memory, a processor and a computer processing program stored on the memory and capable of running on the processor, wherein the processor realizes the steps of the brightness control method when executing the computer processing program.
Furthermore, the present invention proposes a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described brightness control method.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method of the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A brightness control method, characterized in that the brightness control method comprises the steps of:
determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame;
detecting whether a quiescing node change exists in the current time frame compared with the previous time frame;
if the fact that the pause nodes in the current time frame are changed compared with the last time frame is detected, gamma voltage values respectively corresponding to the pause nodes in the current pause interval of the current time frame are adjusted according to the compensation values, and/or common reference voltages corresponding to the pause nodes in the current pause interval are adjusted, and display brightness of a display area output current time frame is changed.
2. The brightness control method of claim 1, wherein before the step of determining a compensation value for compensating for the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame, the method further comprises:
in the process of carrying out refresh rate identification on the previous time frame through a central control board, when a subsequent node of the last pause node in the previous time frame is identified as a newly added pause node in the previous time frame, determining the subsequent node as a new last pause node;
And confirming the current refresh rate of the previous time frame according to the new last pause node, and continuously executing the process of identifying the target refresh rate of the previous time frame after determining the current compensation value based on the current refresh rate.
3. The brightness control method of claim 1, wherein the step of determining a compensation value for compensating the gamma voltage value of the current time frame based on the target refresh rate of the previous time frame comprises:
in the process of identifying the target refresh rate of the previous time frame through the central control board, when the subsequent node of the last pause node in the previous time frame is identified as the initial node of the current time frame, determining the current refresh rate of the previous time frame as the target refresh rate;
and after the compensation value is determined according to the target refresh rate, ending the process of identifying the target refresh rate of the previous time frame.
4. The brightness control method of claim 1, wherein after the step of detecting whether there is a quiescing node change in the current time frame as compared to the previous time frame, the method further comprises:
And if the current time frame is detected to have no pause node change compared with the previous time frame, setting the gamma voltage value of each pause node included in the current time frame as the compensation value.
5. The brightness control method according to claim 1, wherein the step of adjusting gamma voltage values respectively corresponding to respective pause nodes in a current pause interval of the current time frame and adjusting a common reference voltage corresponding to a pause node in the current pause interval according to the compensation value, and changing display brightness of a display area output the current time frame comprises:
setting the gamma voltage value of each pause node in a first pause interval to be the compensation value and keeping the gamma voltage value of the pause node in a second pause interval to be the initial gamma voltage value under the condition that the pause nodes are detected to be increased in the current time frame compared with the previous time frame, wherein the pause interval of the current time frame consists of the first pause interval and the second pause interval, the first pause interval is the same as the pause interval of the previous time frame, and the second pause interval consists of the increased pause nodes;
And adjusting the public reference voltage corresponding to the pause node in the second pause interval to increase the display brightness of the display area output current time frame.
6. The brightness control method of claim 5, wherein the step of adjusting the common reference voltage corresponding to the pause node in the second pause interval comprises:
and identifying a subsequent node of the second pause interval through a central control board, and adjusting a public reference voltage corresponding to the newly added pause node when the subsequent node is identified as the newly added pause node of the second pause interval, so that the display area is capacitively coupled.
7. The brightness control method of claim 5, wherein the step of adjusting the common reference voltage corresponding to the pause node in the second pause interval comprises:
identifying a subsequent node of the second pause interval through a central control board, and determining an adjusted common reference voltage corresponding to the last pause node in the second pause interval as a final coupling voltage when the subsequent node is identified as an initial node of a next time frame;
And controlling the display area to generate capacitive coupling based on the final coupling voltage, and lifting the display area to output the display brightness of the current time frame.
8. The brightness control method according to claim 1, wherein the step of adjusting gamma voltage values respectively corresponding to each pause node in the current pause interval of the current time frame according to the compensation value comprises:
setting the gamma voltage value of each pause node included in the current time frame as the compensation value under the condition that the current time frame is detected to have fewer pause nodes compared with the previous time frame;
after the step of setting the gamma voltage value of each pause node included in the current time frame to the compensation value, the method further includes:
and under the condition that no pause node change exists in the next time frame compared with the current time frame, the gamma voltage value of each pause node included in the next time frame is kept to be the initial gamma voltage value.
9. A display device, characterized in that the display device comprises: memory, a processor and a computer processing program stored on the memory and executable on the processor, the processor implementing the steps of the brightness control method according to any one of claims 1 to 8 when the computer processing program is executed.
10. A computer-readable storage medium, characterized in that the computer-readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the luminance control method of any one of claims 1 to 8.
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