CN113053312A - Dimming method and device of display panel - Google Patents
Dimming method and device of display panel Download PDFInfo
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- CN113053312A CN113053312A CN202110316068.0A CN202110316068A CN113053312A CN 113053312 A CN113053312 A CN 113053312A CN 202110316068 A CN202110316068 A CN 202110316068A CN 113053312 A CN113053312 A CN 113053312A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The embodiment of the invention provides a dimming method and a dimming device of a display panel, wherein the method comprises the following steps: determining a target brightness level of the first input selection; under the condition that the target brightness level belongs to the first dimming interval, acquiring a target pulse frequency corresponding to the target brightness level, and driving the first dimming module to control the light-emitting module to emit light; presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; and reducing the pulse frequency corresponding to the brightness level from the brightness level of N level to the brightness level of the preset threshold level. According to the embodiment of the invention, the corresponding relation between the brightness level and the pulse frequency is preset, so that when the brightness level is reduced, the corresponding pulse frequency is also reduced, and the problem that the display panel flickers due to overlarge reduction of the pulse frequency when the brightness level is switched from the first dimming interval to the second dimming interval is solved.
Description
Technical Field
The invention relates to the technical field of display panels, in particular to a dimming method and a dimming device of a display panel.
Background
In the related art, when dimming a display panel, Direct Current (DC) dimming is generally used in a high-luminance section, and Pulse Width Modulation (PWM) dimming is generally used in a low-luminance section. Wherein, when the direct current is adjusted, the adopted pulse frequency is 1; when the pulse frequency used in pwm dimming is 24, the pulse frequency is suddenly decreased from 24 to 1 at the transition stage of modulating the low-luminance section to the high-luminance section, which causes a problem of flicker of the display panel.
Disclosure of Invention
The invention provides a dimming method of a display panel, which aims to solve the problem that the existing display panel flickers from a low-brightness area to a high-brightness area during dimming.
A first aspect of the present invention provides a dimming method for a display panel, the display panel including: the dimming circuit comprises a light emitting module, a first dimming module and a second dimming module; the first dimming module and the second dimming module are both connected with the light emitting module; the method comprises the following steps:
receiving a first input of a user;
responding to the first input and determining a target brightness level selected by the first input;
under the condition that the target brightness level belongs to a first dimming interval, acquiring a target pulse frequency corresponding to the target brightness level, and driving the first dimming module to control the light-emitting module to emit light by adopting the target pulse frequency;
driving the second dimming module to control the light emitting module to emit light under the condition that the target brightness level belongs to a second dimming interval;
presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; the pulse frequency is 1 from the brightness level of the preset threshold value to the brightness level of the 0 level; and N is an integer and is more than 2.
Optionally, acquiring a current brightness level;
and controlling the light-emitting module to emit light in a mode that the current brightness level is decreased progressively or increased progressively to the target brightness level.
Optionally, the driving the second dimming module to control the light emitting module to emit light in a case that the target brightness level belongs to a second dimming interval includes:
under the condition that the target brightness level belongs to a second dimming interval, acquiring a target voltage signal corresponding to the target brightness level, and driving the second dimming module to control the light-emitting module to emit light by adopting the target voltage signal; and increasing the voltage value of the voltage signal corresponding to the brightness level from the brightness level of the preset threshold level to the brightness level of 0 level.
Optionally, the light emitting module includes a plurality of light emitting units arranged in an array; the first dimming module includes: an integrated control circuit; the integrated control circuit is connected with a plurality of light-emitting units;
the driving the first dimming module to control the light emitting module to emit light by using the target pulse frequency includes:
and inputting the pulse signal of the target pulse frequency to the integrated control circuit so as to drive the integrated control circuit to input the pulse signal of the target pulse frequency to each light-emitting unit according to a preset time sequence and control each light-emitting unit to emit light.
Optionally, the second dimming module comprises: a direct current power supply;
the driving the second dimming module to control the light emitting module to emit light by using the target voltage signal includes:
and inputting the target voltage signal to the direct current power supply to drive the direct current power supply to input a target voltage with a value corresponding to the target voltage signal to the light-emitting module, and controlling the light-emitting module to emit light under the drive of the target voltage.
Optionally, from the N-level brightness level to the brightness level of the preset threshold level, the pulse frequency corresponding to the brightness level decreases in an arithmetic progression.
A second aspect of the present invention provides a dimming device for a display panel, the display panel including: the dimming circuit comprises a light emitting module, a first dimming module and a second dimming module; the first dimming module and the second dimming module are both connected with the light emitting module; the device comprises:
the receiving module is used for receiving a first input of a user;
a determining module, configured to respond to the first input and determine a target brightness level selected by the first input;
the first driving module is used for acquiring a target pulse frequency corresponding to the target brightness level under the condition that the target brightness level belongs to a first dimming interval, and driving the first dimming module to control the light emitting module to emit light by adopting the target pulse frequency;
the second driving module is used for driving the second dimming module to control the light-emitting module to emit light under the condition that the target brightness level belongs to a second dimming interval;
presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; the pulse frequency is 1 from the brightness level of the preset threshold value to the brightness level of the 0 level; and N is an integer and is more than 2.
Optionally, the method further comprises:
the acquisition module is used for acquiring the current brightness level;
and the control module is used for controlling the light-emitting module to emit light in a mode that the current brightness level is decreased progressively or increased progressively to the target brightness level.
Optionally, the second driving module includes:
the driving unit is used for acquiring a target voltage signal corresponding to the target brightness level under the condition that the target brightness level belongs to a second dimming interval, and driving the second dimming module to control the light-emitting module to emit light by adopting the target voltage signal; and increasing the voltage value of the voltage signal corresponding to the brightness level from the brightness level of the preset threshold level to the brightness level of 0 level.
Optionally, the light emitting module includes a plurality of light emitting units arranged in an array; the first dimming module includes: an integrated control circuit; the integrated control circuit is connected with a plurality of light-emitting units;
the first driving module is specifically configured to input the pulse signal of the target pulse frequency to the integrated control circuit, so as to drive the integrated control circuit to input the pulse signal of the target pulse frequency to each light emitting unit according to a preset time sequence, and control each light emitting unit to emit light.
Optionally, the second dimming module comprises: a direct current power supply;
the driving unit is specifically configured to input the target voltage signal to the dc power supply, so as to drive the dc power supply to input a target voltage corresponding to the target voltage signal to the light emitting module, and control the light emitting module to emit light under the driving of the target voltage.
Optionally, from the N-level brightness level to the brightness level of the preset threshold level, the pulse frequency corresponding to the brightness level decreases in an arithmetic progression.
The embodiment of the invention provides a dimming method of a display panel, wherein the display panel comprises the following steps: the dimming circuit comprises a light emitting module, a first dimming module and a second dimming module; the first dimming module and the second dimming module are both connected with the light emitting module; the method comprises the following steps: receiving a first input of a user; responding to the first input and determining a target brightness level selected by the first input; under the condition that the target brightness level belongs to a first dimming interval, acquiring a target pulse frequency corresponding to the target brightness level, and driving the first dimming module to control the light-emitting module to emit light by adopting the target pulse frequency; presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; and N is an integer and is more than 2. According to the embodiment of the invention, the corresponding relation between the brightness level and the pulse frequency is preset, so that when the brightness level is reduced, the corresponding pulse frequency is also reduced, and the problem that the display panel flickers due to overlarge reduction of the pulse frequency when the brightness level is switched from the first dimming interval to the second dimming interval is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic diagram of a display panel according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a dimming method of a display panel according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating an embodiment of a display panel screen dimming;
FIG. 4 is a schematic diagram of a circuit connection of a display panel according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a correspondence relationship between parameters of a dimming method of a display panel according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a correspondence relationship between various parameters of another dimming method for a display panel according to an embodiment of the present invention;
FIG. 7 is a diagram illustrating a relationship between a brightness level and a pulse frequency according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a display screen of a high-speed camera with different brightness levels according to an embodiment of the present invention;
fig. 9 is a block diagram of a dimming device of a display panel according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present 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.
Example one
Referring to fig. 1, a block diagram of a display panel according to an embodiment of the present invention is shown, where the display panel includes: a light emitting module 10, a first dimming module 20, and a second dimming module 30; the first dimming module 20 and the second dimming module 30 are both connected to the light emitting module 10.
Referring to fig. 2, a flowchart illustrating steps of a dimming method of a display panel according to an embodiment of the present invention is provided, where the method includes:
In the embodiment of the present invention, it can be applied to any electronic apparatus having a display panel. For example: cell phones, pads, computers, televisions, watches, etc. The receiving of the first input of the user may be receiving an input of the user through a mouse, a screen sliding input, or a voice input.
Specifically, the first input is used for adjusting the light emitting brightness of the display panel, and a user can input the brightness levels, and the different brightness levels correspond to different brightness of the display panel, so that the light emitting brightness can be adjusted.
Referring to fig. 3, taking the display panel of the mobile phone as an example, an icon D represents adjusting the screen to be darkest, an icon L represents adjusting the screen to be brightest, and P is a slide button; the user can move from the icon D to the icon L through the touch sliding button P to adjust the display screen corresponding to the display panel of the mobile phone to become bright, and move from the icon L to the icon D to adjust the display screen corresponding to the display panel of the mobile phone to become dark.
In addition, for other electronic devices, the display panel may also adjust the brightness of the display panel in the above manner, which is not described herein again.
In the embodiment of the invention, the brightness level from 0 level to N level is preset; for example, in fig. 3, the icon D corresponds to N-level brightness levels, and the icon L corresponds to 0-level brightness levels. The icon D and the icon L can be divided into N-1 levels for the user to adjust, the brightness level is adjusted by the user by moving the sliding button, and the position where the touch button stays is the target brightness level.
Specifically, the corresponding relationship between the position of the touch button and the brightness level may be preset, and determining the target brightness level selected by the first input includes: and acquiring the position of the touch button, and determining the target brightness level according to the corresponding relation.
In addition, N levels may be set to 10 levels, so that the brightness levels may correspond to a plurality of different brightnesses for the user to select.
In the embodiment of the invention, the brightness levels from 0 level to N level are preset, the brightness level from N level to a preset threshold (excluding the preset threshold level) level is taken as a first dimming interval, and a first dimming module is adopted to dim the light emitting module; and taking the brightness level from the preset threshold level to the 0 level as a second dimming interval, and dimming the light emitting module by adopting a second dimming module.
In addition, the corresponding relation between the brightness level and the pulse frequency in the first dimming interval is preset, the pulse frequency corresponding to the higher brightness level is higher, and the pulse frequency is reduced along with the reduction of the brightness level. The pulse frequency refers to the number of pulses in a unit time, and generally refers to the number of pulses in a time period in which a screen flickers for one frame of picture.
For example: n is equal to 9, the preset threshold is 5, the brightness level between 9 levels and 5 (excluding 5 levels) is the first dimming interval, and the brightness level between 5 levels and 0 is the second dimming interval. Setting the pulse frequency corresponding to the 9-level brightness level as 24, the pulse frequency corresponding to the 8-level brightness level as 18, the pulse frequency corresponding to the 7-level brightness level as 12, and the pulse frequency corresponding to the 6-level brightness level as 6; in the embodiment of the present invention, the brightness level may be set to a pulse frequency with a corresponding magnitude according to a requirement, and is not limited herein.
Further, referring to fig. 1 and 4, the light emitting module 10 includes a plurality of light emitting units 11 arranged in an array; the first dimming module includes: an integrated control circuit 20; the integrated control circuit is connected with a plurality of the light emitting units 11; step 103 comprises: inputting the pulse signal of the target pulse frequency to the integrated control circuit 20 to drive the integrated control circuit to input the pulse signal of the target pulse frequency to each light emitting unit 11 according to a preset time sequence, and controlling each light emitting unit 11 to emit light.
Each of the light emitting units in fig. 1 is connected to the first dimming module and the second dimming module, and fig. 4 shows a connection manner of one of the light emitting units 11 to the first dimming module and the second dimming module. Specifically, in the first dimming interval, a pulse signal is externally input to the first dimming module, and the first dimming module inputs the pulse signal to the light emitting units line by line, so that the light emitting units 11 in different lines emit light according to a time sequence. In the second dimming interval, the second dimming module inputs a dc voltage to the light emitting unit 11 to control the light emitting unit to emit light.
Further, in fig. 4, the light emitting unit 11 includes a first thin film transistor T1, a second thin film transistor T2, a third thin film transistor T3, a light emitting diode OLED; the first level of the light emitting diode OLED is grounded, and the second level of the light emitting diode OLED is connected with the source electrode of the second thin film transistor; the gate EM of the second thin film transistor is connected to the first dimming module 20 or the second dimming module 30. The source electrode of the first thin film transistor is connected with the second thin film transistor; the first dimming module 20 controls the light emitting diode to emit light and the brightness of the light emission by controlling the connection and disconnection of the second thin film transistor T2; the second dimming module controls the light emitting brightness of the light emitting diode by controlling the voltage input to the second thin film transistor.
And 104, driving the second dimming module to control the light emitting module to emit light under the condition that the target brightness level belongs to a second dimming interval.
Wherein the second dimming module comprises: a direct current power supply DC; the driving the second dimming module to control the light emitting module to emit light by using the target voltage signal includes: and inputting the target voltage signal to the direct current power supply to drive the direct current power supply to input a target voltage with a value corresponding to the target voltage signal to the light-emitting module, and controlling the light-emitting module to emit light under the drive of the target voltage.
When the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; the pulse frequency is 1 from the brightness level of the preset threshold value to the brightness level of the 0 level; and N is an integer and is more than 2.
In fig. 5, the preset threshold is 5, and the preset threshold may be set according to actual needs, and is not limited herein.
Further, step 104, comprises: under the condition that the target brightness level belongs to a second dimming interval, acquiring a target voltage signal corresponding to the target brightness level, and driving the second dimming module to control the light-emitting module to emit light by adopting the target voltage signal; and increasing the voltage value of the voltage signal corresponding to the brightness level from the brightness level of the preset threshold level to the brightness level of 0 level.
Referring to fig. 5, a schematic diagram of a signal input in the light emitting unit 11 is shown. Specifically, the first dimming module 20 inputs a pulse signal to the second thin film transistor EM by Pulse Width Modulation (PWM) dimming in the first dimming interval a, where the input pulse frequency decreases with a decrease in the luminance level, and the duty ratio of the high level increases with a decrease in the luminance level when all of T1 to T3 are N-type semiconductors. In the second dimming interval B, the second dimming module inputs voltages of different values to the second thin film transistor by using Direct Current (DC) dimming, and in the second dimming interval B, the pulse frequency of the voltage signal input to the second thin film transistor is maintained at 1, the high level ratio is not changed, only the input voltage value is changed, and the voltage value is increased as the brightness level is decreased.
In the embodiment of the present invention, fig. 5 is only an example of a light emitting unit, and the method of the embodiment of the present invention may be applied to dimming of any light emitting unit.
Further, in fig. 5, as the luminance level decreases, the light emitting unit light emission luminance becomes larger. A brightness level of 0 represents the brightest and a brightness level of 9 represents the darkest.
Referring to fig. 5, the pulse frequencies corresponding to the N-level brightness levels to the preset threshold level (excluding the preset threshold) decrease in an arithmetic progression.
Referring to fig. 6, from the N-level brightness level to the brightness level of the preset threshold level (not including the preset threshold), the pulse frequency corresponding to the brightness level may be decreased according to a preset format. For example, in fig. 6, the first dimming interval sets 3-segment intervals a1, a2, and a3 in which the pulse frequencies corresponding to the luminance levels are decreased in different arithmetic progression in different segment intervals.
In the embodiment of the present invention, the manner in which the pulse frequency decreases as the brightness level decreases may be set according to needs, and is not limited herein.
Referring to fig. 7, a diagram of the pulse frequency of the input light emitting unit corresponding to fig. 5 is shown, wherein fig. 7 shows the number of pulses per unit time (one frame of picture). When the brightness level is 0-5, dimming is performed in a Direct Current (DC) mode, and the pulse frequency of the voltage signal input by the second dimming module is always 1 due to high brightness. When the brightness level is 6-9, the first dimming module adjusts the brightness of the light emitting module by adopting the adjusting pulse frequency due to the reduction of the brightness, wherein the pulse frequency is increased from 6 levels to 9 levels, and the high level ratio is reduced.
Fig. 7 shows a case where the light emitting cells each employ an N-type thin film transistor, and if a P-type thin film transistor is employed, the high balance and the low level in fig. 7 are reversed.
Referring to fig. 8, which is a schematic diagram of a display panel shot by a high-speed camera, it can be seen that the number of black lines displayed in each frame of an image in fig. 8 is a pulse frequency, and the pulse frequency is directly reduced from 24 to 1, which is easy to cause a flicker problem, but the pulse frequency is reduced from 1 when the pulse frequency is lower, which does not cause a flicker problem.
In an embodiment of the present invention, the method further comprises: acquiring a current brightness level; and controlling the light-emitting module to emit light in a mode that the current brightness level is decreased progressively or increased progressively to the target brightness level.
And when the current brightness level is greater than the target brightness level, controlling the light-emitting module to emit light in a mode that the current brightness level is decreased to the target brightness level. And when the current brightness level is less than the target brightness level, controlling the light-emitting module to emit light in a mode that the current brightness level is increased to the target brightness level.
Specifically, when the current brightness level belongs to a first dimming interval and the target brightness level belongs to a second dimming interval, the light emitting module is controlled to emit light in a manner that the current brightness level decreases to the target brightness level. And under the condition that the current brightness level belongs to a second dimming interval and the target brightness level belongs to a first dimming interval, controlling the light-emitting module to emit light in a mode that the current brightness level is gradually increased to the target brightness level.
In the embodiment of the present invention, referring to fig. 5, for example, when the current brightness level is 9 levels, it needs to be adjusted to 5 levels, so that the light emitting module can be adjusted from 9 levels to 8 levels, then adjusted to 7 levels, then adjusted to 6 levels, and then adjusted to 5 levels.
The embodiment of the invention provides a dimming method of a display panel, wherein the display panel comprises the following steps: the dimming circuit comprises a light emitting module, a first dimming module and a second dimming module; the first dimming module and the second dimming module are both connected with the light emitting module; the method comprises the following steps: receiving a first input of a user; responding to the first input and determining a target brightness level selected by the first input; under the condition that the target brightness level belongs to a first dimming interval, acquiring a target pulse frequency corresponding to the target brightness level, and driving the first dimming module to control the light-emitting module to emit light by adopting the target pulse frequency; presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; and N is an integer and is more than 2. According to the embodiment of the invention, the corresponding relation between the brightness level and the pulse frequency is preset, so that when the brightness level is reduced, the corresponding pulse frequency is also reduced, and the problem that the display panel flickers due to overlarge reduction of the pulse frequency when the brightness level is switched from the first dimming interval to the second dimming interval is solved.
Example two
Referring to fig. 9, a schematic structural diagram of a dimming device 200 of a display panel according to an embodiment of the present invention is shown, and referring to fig. 1, the display panel includes: a light emitting module 10, a first dimming module 20, and a second dimming module 30; the first dimming module and the second dimming module are both connected with the light emitting module; the device comprises:
a receiving module 201, configured to receive a first input of a user;
a determining module 202, configured to respond to the first input and determine a target brightness level selected by the first input;
the first driving module 203 is configured to, when the target brightness level belongs to a first dimming interval, obtain a target pulse frequency corresponding to the target brightness level, and drive the first dimming module to control the light emitting module to emit light by using the target pulse frequency;
the second driving module 204 is configured to drive the second dimming module to control the light emitting module to emit light when the target brightness level belongs to a second dimming interval;
presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; the pulse frequency is 1 from the brightness level of the preset threshold value to the brightness level of the 0 level; and N is an integer and is more than 2.
Optionally, the method further comprises:
the acquisition module is used for acquiring the current brightness level;
and the control module is used for controlling the light-emitting module to emit light in a mode that the current brightness level is decreased progressively or increased progressively to the target brightness level.
Optionally, the second driving module includes:
the driving unit is used for acquiring a target voltage signal corresponding to the target brightness level under the condition that the target brightness level belongs to a second dimming interval, and driving the second dimming module to control the light-emitting module to emit light by adopting the target voltage signal; and increasing the voltage value of the voltage signal corresponding to the brightness level from the brightness level of the preset threshold level to the brightness level of 0 level.
Optionally, the light emitting module includes a plurality of light emitting units arranged in an array; the first dimming module includes: an integrated control circuit; the integrated control circuit is connected with a plurality of light-emitting units;
the first driving module is specifically configured to input the pulse signal of the target pulse frequency to the integrated control circuit, so as to drive the integrated control circuit to input the pulse signal of the target pulse frequency to each light emitting unit according to a preset time sequence, and control each light emitting unit to emit light.
Optionally, the second dimming module comprises: a direct current power supply;
the driving unit is specifically configured to input the target voltage signal to the dc power supply, so as to drive the dc power supply to input a target voltage corresponding to the target voltage signal to the light emitting module, and control the light emitting module to emit light under the driving of the target voltage.
Optionally, from the N-level brightness level to the brightness level of the preset threshold level, the pulse frequency corresponding to the brightness level decreases in an arithmetic progression.
The embodiment of the invention provides a dimming device of a display panel, wherein the display panel comprises: the dimming circuit comprises a light emitting module, a first dimming module and a second dimming module; the first dimming module and the second dimming module are both connected with the light emitting module; the dimming device is used for receiving a first input of a user; responding to the first input and determining a target brightness level selected by the first input; under the condition that the target brightness level belongs to a first dimming interval, acquiring a target pulse frequency corresponding to the target brightness level, and driving the first dimming module to control the light-emitting module to emit light by adopting the target pulse frequency; presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; and N is an integer and is more than 2. According to the embodiment of the invention, the corresponding relation between the brightness level and the pulse frequency is preset, so that when the brightness level is reduced, the corresponding pulse frequency is also reduced, and the problem that the display panel flickers due to overlarge reduction of the pulse frequency when the brightness level is switched from the first dimming interval to the second dimming interval is solved.
The embodiments of the present invention may be applied to any combination method in the first embodiment, and details are not described herein with specific reference to the first embodiment.
An embodiment of the present invention further provides an electronic device, which includes a processor, a memory, and a program or an instruction stored in the memory and executable on the processor, and when the program or the instruction is executed by the processor, the method according to the first embodiment is implemented.
Embodiments of the present invention further provide a readable storage medium, on which a program or instructions are stored, and when executed by a processor, the program or instructions implement the steps of the method according to the first embodiment.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (12)
1. A dimming method of a display panel, the display panel comprising: the dimming circuit comprises a light emitting module, a first dimming module and a second dimming module; the first dimming module and the second dimming module are both connected with the light emitting module; the method comprises the following steps:
receiving a first input of a user;
responding to the first input and determining a target brightness level selected by the first input;
under the condition that the target brightness level belongs to a first dimming interval, acquiring a target pulse frequency corresponding to the target brightness level, and driving the first dimming module to control the light-emitting module to emit light by adopting the target pulse frequency;
driving the second dimming module to control the light emitting module to emit light under the condition that the target brightness level belongs to a second dimming interval;
presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; the pulse frequency is 1 from the brightness level of the preset threshold value to the brightness level of the 0 level; and N is an integer and is more than 2.
2. The dimming method of claim 1, further comprising:
acquiring a current brightness level;
and controlling the light-emitting module to emit light in a mode that the current brightness level is decreased progressively or increased progressively to the target brightness level.
3. The dimming method according to claim 1,
the driving the second dimming module to control the light emitting module to emit light when the target brightness level belongs to a second dimming interval includes:
under the condition that the target brightness level belongs to a second dimming interval, acquiring a target voltage signal corresponding to the target brightness level, and driving the second dimming module to control the light-emitting module to emit light by adopting the target voltage signal; and increasing the voltage value of the voltage signal corresponding to the brightness level from the brightness level of the preset threshold level to the brightness level of 0 level.
4. The dimming method according to claim 1, wherein the light emitting module comprises a plurality of light emitting units arranged in an array; the first dimming module includes: an integrated control circuit; the integrated control circuit is connected with a plurality of light-emitting units;
the driving the first dimming module to control the light emitting module to emit light by using the target pulse frequency includes:
and inputting the pulse signal of the target pulse frequency to the integrated control circuit so as to drive the integrated control circuit to input the pulse signal of the target pulse frequency to each light-emitting unit according to a preset time sequence and control each light-emitting unit to emit light.
5. The dimming method of claim 3, wherein the second dimming module comprises: a direct current power supply;
the driving the second dimming module to control the light emitting module to emit light by using the target voltage signal includes:
and inputting the target voltage signal to the direct current power supply to drive the direct current power supply to input a target voltage with a value corresponding to the target voltage signal to the light-emitting module, and controlling the light-emitting module to emit light under the drive of the target voltage.
6. The dimming method according to claim 3, wherein the pulse frequencies corresponding to the N-level brightness levels are decreased in an arithmetic progression from the N-level brightness level to the brightness level of the preset threshold level.
7. A dimming device for a display panel, the display panel comprising: the dimming circuit comprises a light emitting module, a first dimming module and a second dimming module; the first dimming module and the second dimming module are both connected with the light emitting module; the device comprises:
the receiving module is used for receiving a first input of a user;
a determining module, configured to respond to the first input and determine a target brightness level selected by the first input;
the first driving module is used for acquiring a target pulse frequency corresponding to the target brightness level under the condition that the target brightness level belongs to a first dimming interval, and driving the first dimming module to control the light emitting module to emit light by adopting the target pulse frequency;
the second driving module is used for driving the second dimming module to control the light-emitting module to emit light under the condition that the target brightness level belongs to a second dimming interval;
presetting a 0-level brightness level to an N-level brightness level; when the grade number of the brightness grade is larger than a preset threshold value, the brightness grade belongs to a first dimming interval; when the number of the levels of the brightness levels is smaller than or equal to the preset threshold, the brightness levels belong to a second dimming interval; from the N-level brightness level to the brightness level of the preset threshold level, reducing the pulse frequency corresponding to the brightness level; the pulse frequency is 1 from the brightness level of the preset threshold value to the brightness level of the 0 level; and N is an integer and is more than 2.
8. The dimming device of claim 7, further comprising:
the acquisition module is used for acquiring the current brightness level;
and the control module is used for controlling the light-emitting module to emit light in a mode that the current brightness level is decreased progressively or increased progressively to the target brightness level.
9. The dimming device of claim 7, wherein the second driving module comprises:
the driving unit is used for acquiring a target voltage signal corresponding to the target brightness level under the condition that the target brightness level belongs to a second dimming interval, and driving the second dimming module to control the light-emitting module to emit light by adopting the target voltage signal; and increasing the voltage value of the voltage signal corresponding to the brightness level from the brightness level of the preset threshold level to the brightness level of 0 level.
10. The dimming device of claim 9, wherein the light emitting module comprises a plurality of light emitting units arranged in an array; the first dimming module includes: an integrated control circuit; the integrated control circuit is connected with a plurality of light-emitting units;
the first driving module is specifically configured to input the pulse signal of the target pulse frequency to the integrated control circuit, so as to drive the integrated control circuit to input the pulse signal of the target pulse frequency to each light emitting unit according to a preset time sequence, and control each light emitting unit to emit light.
11. The dimming device of claim 9, wherein the second dimming module comprises: a direct current power supply;
the driving unit is specifically configured to input the target voltage signal to the dc power supply, so as to drive the dc power supply to input a target voltage corresponding to the target voltage signal to the light emitting module, and control the light emitting module to emit light under the driving of the target voltage.
12. The dimming apparatus of claim 7, wherein the pulse frequency of the N-level brightness level decreases in an arithmetic progression from the N-level brightness level to the preset threshold level.
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