CN111583877A - Driving circuit, driving method thereof and display device - Google Patents
Driving circuit, driving method thereof and display device Download PDFInfo
- Publication number
- CN111583877A CN111583877A CN202010475249.3A CN202010475249A CN111583877A CN 111583877 A CN111583877 A CN 111583877A CN 202010475249 A CN202010475249 A CN 202010475249A CN 111583877 A CN111583877 A CN 111583877A
- Authority
- CN
- China
- Prior art keywords
- driving
- driving unit
- unit group
- light emitting
- emitting diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 53
- 238000005192 partition Methods 0.000 claims description 21
- 241001270131 Agaricus moelleri Species 0.000 claims description 20
- 230000005669 field effect Effects 0.000 claims description 9
- 239000004065 semiconductor Substances 0.000 claims description 5
- 229910044991 metal oxide Inorganic materials 0.000 claims description 4
- 150000004706 metal oxides Chemical group 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 6
- 230000002349 favourable effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 30
- 239000004973 liquid crystal related substance Substances 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000003491 array Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 5
- 230000001052 transient effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012788 optical film Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
Landscapes
- Engineering & Computer Science (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 driving circuit, a driving method thereof and a display device, belonging to the technical field of display, wherein the driving circuit comprises a plurality of driving units which are arranged in an array, each driving unit comprises a switch control tube and a light emitting diode which are electrically connected, and the control end of each switch control tube is electrically connected with a driving signal wire; the driving units arranged in the array at least comprise a first driving unit group and a second driving unit group, and the working time of the first driving unit group is not overlapped with the working time of the second driving unit group. The driving method is used for driving the driving circuit to work. The display device comprises the driving circuit. The driving circuit can avoid the occurrence of the condition of generating instantaneous heavy current, achieves the purpose of reducing power consumption at the same moment, and is favorable for realizing the effect of low power consumption.
Description
Technical Field
The invention relates to the technical field of display, in particular to a driving circuit, a driving method thereof and a display device.
Background
Liquid crystal displays have been widely used in information products such as notebook computers, Personal Digital Assistants (PDAs), and mobile phones. A common LCD in the market at present is a liquid crystal display panel (LCD panel) composed of two transparent glass substrates and a liquid crystal layer disposed between the two glass substrates, and other electronic circuit components such as thin film transistors and color filter arrays on the glass substrates. Since the lcd panel does not emit light, a backlight module is required to be combined with the back of the lcd panel after the lcd panel is manufactured, so as to provide a light source for displaying images, thereby completing a standard lcd. The backlight module is divided into a side-in type backlight module and a direct type backlight module according to different incident positions of the light source. The direct type backlight module is to arrange a Light source such as a cathode Fluorescent Lamp (CCFL) or a Light Emitting Diode (LED) behind the liquid crystal display panel to directly form a surface Light source for the liquid crystal display panel. The side-in backlight module is formed by arranging a backlight LED lamp strip at the edge of a back Plate at the rear side of a liquid crystal display panel, wherein Light rays emitted by the LED lamp strip enter a Light Guide Plate from a Light incident surface at one side of a specially-arranged Light Guide Plate (LGP), are reflected and diffused by the Light Guide Plate and then are emitted from a Light emitting surface of the Light Guide Plate, and then pass through an optical film group to form a surface Light source to be provided for the liquid crystal display panel.
With the rapid development of electronic products, users have different experiences and demands. At present, electronic products are continuously updated and have perfect functions, and the increasingly developed life and work needs of people are met. The light emitting diode has the advantages of small volume and low energy consumption, so that the light emitting diode is widely applied as a light source, and the brightness can be controlled by controlling the average current flowing through the LED load as the light source. Meanwhile, the color temperature can be controlled by controlling the instantaneous current of the LED load. Therefore, the average current is controlled by a Pulse Width Modulation (PWM) signal, and the brightness can be adjusted. However, in the driving circuit in the prior art, which controls the average current of the light source by using the pulse width modulation signal to adjust the brightness, the problems of excessive instantaneous current and high power consumption often occur.
Therefore, it is an urgent need to solve the technical problems of the prior art to provide a driving circuit, a driving method thereof, and a display device with low power consumption and capable of avoiding generation of instantaneous large current.
Disclosure of Invention
In view of the above, the present invention provides a driving circuit, a driving method thereof, and a display device, so as to solve the problem that when the driving circuit in the prior art uses a pulse width modulation signal to control an average current of a light source to achieve brightness adjustment, an instantaneous current is too large.
The invention discloses a driving circuit, comprising: the driving units are arranged in an array mode, each driving unit comprises a switch control tube and a light emitting diode which are electrically connected, and the control end of each switch control tube is electrically connected with one driving signal wire; the driving units arranged in the array at least comprise a first driving unit group and a second driving unit group, and the working time of the first driving unit group is not overlapped with the working time of the second driving unit group.
Based on the same inventive concept, the invention also discloses a driving method of the driving circuit, which is used for driving the driving circuit to work; the driving method includes: calculating the gray scale of the light emitting diode in each driving unit corresponding to the picture to be displayed according to the picture to be displayed; dividing each driving unit into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group; respectively controlling the light emitting diodes in each first driving unit group and each second driving unit group to emit light according to the calculated different gray scales of the light emitting diodes in each driving unit; wherein the operation time of the first driving unit group does not overlap with the operation time of the second driving unit group.
Based on the same inventive concept, the invention also discloses a driving method of the driving circuit, which is used for driving the driving circuit to work; the driving method includes: calculating the gray scale of the light emitting diode in each driving unit corresponding to the picture to be displayed according to the picture to be displayed; dividing each driving unit into a plurality of first driving units and a plurality of second driving units according to the calculated gray scale of the light emitting diode in each driving unit, wherein the gray scale of the light emitting diode in the first driving unit is equal to 0, and the gray scale of the light emitting diode in the second driving unit is greater than 0; dividing the plurality of second-type driving units into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group; respectively controlling the light emitting diodes in each first driving unit group and each second driving unit group to emit light according to the calculated different gray scales of the light emitting diodes in each driving unit; wherein the operation time of the first driving unit group does not overlap with the operation time of the second driving unit group.
Based on the same inventive concept, the invention also discloses a display device which comprises the driving circuit.
Compared with the prior art, the driving circuit, the driving method and the display device provided by the invention at least realize the following beneficial effects:
in the invention, each driving unit is led out a driving signal line independently, each driving signal line needs to input a driving signal to the control end of the switch control tube independently, the brightness (i.e. gray scale) of the light-emitting diode can be controlled by the length of the power-on time of the light-emitting diode, the switch control tube is used as a switch element to realize whether the light-emitting diode is powered on or not, the length of the power-on time of the light-emitting diode can be adjusted by different driving signals input by the driving signal lines, the independent control of the driving unit can be realized, the scanning driving control is not needed, the light-emitting brightness of the light-emitting diode is directly controlled by inputting different driving signals by the respective driving signal lines, the control is simple, flexible and. The driving units arranged in the array at least comprise a first driving unit group and a second driving unit group, the working time of the first driving unit group is not overlapped with the working time of the second driving unit group, namely the working time of any second driving unit group is positioned between the working times of two adjacent first driving unit groups, or the working time of any first driving unit group is positioned between the working times of two adjacent second driving unit groups, so that the condition of generating instantaneous large current can be avoided, the purpose of reducing the power consumption at the same moment is achieved, and the effect of low power consumption is favorably realized.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic plan view of a driving circuit according to an embodiment of the present invention;
FIG. 2 is a timing diagram of the operation of the driving circuit of FIG. 1;
FIG. 3 is a schematic diagram of the transient current generated by a driving circuit in the related art;
FIG. 4 is a schematic diagram of an instantaneous current generated by a driving circuit according to an embodiment of the present invention;
FIG. 5 is an enlarged schematic view of a drive unit of FIG. 1;
fig. 6 is an operation timing chart of the driving unit in fig. 5;
fig. 7 is a schematic diagram of a planar structure of another driving circuit according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a planar structure of another driving circuit according to an embodiment of the present invention;
fig. 9 is a schematic plan view of another driving circuit according to an embodiment of the present invention;
fig. 10 is a schematic plan view of another driving circuit according to an embodiment of the present invention;
fig. 11 is a schematic plan view of another driving circuit according to an embodiment of the present invention;
fig. 12 is a schematic plan view of another driving circuit according to an embodiment of the present invention;
fig. 13 is a schematic workflow diagram of a driving method according to an embodiment of the present invention;
FIG. 14 is a schematic workflow diagram of another driving method provided by an embodiment of the invention;
fig. 15 is a schematic plan view of another driving circuit according to an embodiment of the present invention;
fig. 16 is a schematic workflow diagram of a driving method of the driving circuit of fig. 15;
fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Referring to fig. 1-2, fig. 1 is a schematic diagram illustrating a planar structure of a driving circuit according to an embodiment of the present invention, fig. 2 is a timing diagram illustrating an operation of the driving circuit of fig. 1, and a driving circuit 000 according to an embodiment of the present invention includes: a plurality of driving units 10 arranged in an array, wherein each driving unit 10 comprises a switch control tube 20 and a light emitting diode 30 which are electrically connected, and a control end 201 of each switch control tube 20 is electrically connected with one driving signal line 40;
the plurality of driving units 10 arranged in an array at least include a first driving unit group 10A and a second driving unit group 10B, and the operation time of the first driving unit group 10A does not overlap with the operation time of the second driving unit group 10B. Alternatively, the operation time of the first driving unit group 10A and the operation time of the second driving unit group 10B do not overlap within one frame display screen.
Specifically, the driving circuit 000 of the present embodiment can be applied to a backlight module, and used as a driving circuit of the backlight module to provide different backlight brightness, form a surface light source and provide the surface light source to a liquid crystal display panel. The driving circuit 000 of this embodiment may also be applied to a submillimeter Light Emitting Diode (Mini LED) or a Micro LED (Micro LED) display, and is a display that realizes image display by using a high-density Micro-small-sized LED array integrated on one substrate as display pixels, each pixel is addressable and independently driven to Light, and the distance between pixels is reduced from millimeter level to micron level, and the Micro LED or Mini LED display and an Organic Light-Emitting Diode (OLED) display are self-Emitting displays as well, and have the advantages of better material stability, longer service life, no image imprinting, and the like.
The driving circuit 000 of the present embodiment, whether applied to a backlight module, or applied to a submillimeter light emitting diode (Mini LED) or a Micro LED (Micro LED) display panel, may include a plurality of driving units 10 arranged in an array, where each driving unit 10 includes a switch control tube 20 and a light emitting diode 30 electrically connected to each other; optionally, the light emitting diode 30 is any one of a sub-millimeter light emitting diode (Mini LED) or a Micro light emitting diode (Micro LED), and the embodiment is not particularly limited. The control end 201 of each switch control tube 20 of the present embodiment is electrically connected to one driving signal line 40, that is, one driving signal line 40 is independently led out from each driving unit 10, each driving signal line 40 needs to separately input one driving signal to the control end 201 of the switch control tube 20, the brightness (i.e., gray scale) of the light emitting diode 30 can be controlled by the length of the power-on time of the light emitting diode 30, the switch control tube 20 is used as a switching element to realize the power-on of the light emitting diode 30, and the length of the power-on time of the light emitting diode 30 can be adjusted by the different driving signals input by the driving signal lines 40, that is, the different gray scales of the light emitting diode 30 of each driving unit 10 are realized by inputting different driving signals by the respective driving signal lines 40, the driving signal lines 40 can be connected to a driving chip (not shown in the figure) to realize the, the brightness of the light emitting diode 30 is directly controlled by inputting different driving signals through respective driving signal lines 40 without scanning driving control, and the control is simple, flexible and good in dynamic response, and is beneficial to improving the contrast.
In the related art, please refer to fig. 3, fig. 3 is a schematic diagram of an instantaneous current generated when a driving circuit in the related art works, and a driving timing of the driving circuit is that since the light emitting diodes 30 of all the driving units 10 are driven to light through the driving signal input through the driving signal line 40 at the same time, the instantaneous current is easily too large to trigger the overcurrent protection. As shown in fig. 3, in 1 frame, taking the example that the driving signals input by the 4 driving signal lines 40 simultaneously drive the light emitting diodes 30 to emit light, the instantaneous current in the first time period is 4I, which is easy to generate instantaneous large current, and the excessive instantaneous heat generation is easy to cause excessive power consumption and product damage. It should be noted that fig. 3 only illustrates the driving timing of 4 driving signal lines 40, and in practical implementation, one driving unit 10 corresponds to one driving signal line 40, so the number of driving signal lines 40 of the whole driving circuit is not limited thereto, and it should be understood that fig. 3 is only schematic for illustrating the instantaneous large current.
In view of the above problem, the present embodiment proposes that all of the plurality of driving units 10 arranged in an array in the driving circuit 000 are arranged in groups, the driving units 10 arranged in the plurality of arrays are divided into at least two groups, and the first driving unit group 10A and the second driving unit group 10B are taken as an example, the operating time of the first driving unit group 10A is arranged not to overlap with the operating time of the second driving unit group 10B, that is, at least two groups of driving units into which all of the driving units 10 are divided are staggered in driving timing. Alternatively, as shown in FIG. 2, the present embodimentThe plurality of driving units 10 arranged in an array of the embodiment includes at least a first driving unit group 10A and a second driving unit group 10B, and the operation time of the first driving unit group 10A does not overlap with the operation time of the second driving unit group 10B, i.e., the operation time T of any one second driving unit group 10BBThe operation time T of two adjacent first driving unit groups 10AAIn between, the operation time T of any one of the first drive unit groups 10A may beAWorking time T of two adjacent second driving unit groups 10BBIn the meantime. When the plurality of driving units 10 arranged in an array are divided into a first driving unit group 10A and a second driving unit group 10B, as shown in fig. 4, fig. 4 is a schematic diagram of instantaneous currents generated when the driving circuit provided by the embodiment of the present invention operates, in fig. 4, the driving units driven by the first driving signal line and the second driving signal line are divided into a group of driving unit groups, the driving units driven by the third driving signal line and the fourth driving signal line are divided into another group of driving unit groups, in one frame, only the driving signals input by the two driving signal lines 40 of one group of driving unit groups simultaneously drive the light emitting diodes 30 to emit light, and the instantaneous current in the first time period is only 2I, so that the occurrence of instantaneous large currents is avoided, the purpose of power consumption reduction at the same time is achieved, and the low power consumption effect is facilitated. It should be noted that fig. 4 only illustrates a driving timing sequence in which 4 driving signal lines are divided into two groups of driving unit groups, and in practical implementation, one driving unit 10 corresponds to one driving signal line 40, so the number of driving signal lines 40 of the whole driving circuit is not limited thereto, and the number of groups may also be not limited thereto, and it should be understood that fig. 4 is only schematic for illustrating the instantaneous large current.
It should be noted that, in the present embodiment, the beneficial effects of the present embodiment are explained only by taking as an example that the plurality of driving units 10 arranged in an array are divided into at least two groups of driving unit groups, and in specific implementation, the number of all the driving units 10 arranged in groups may be three or more, and only the requirement that each group is staggered in driving timing is satisfied. In this embodiment, the grouping manner of all the driving units 10 is not specifically limited, and the driving units 10 may be grouped in order (as shown in fig. 1, at least one row of driving units 10 in the driving units 10 arranged in an array is a group, and at least one column of driving units 10 is a group), or the driving units 10 arranged in a staggered manner are a group, and only the arrangement manner having a certain rule is required, so as to achieve the purpose of uniformizing the brightness.
It should be further noted that the switch control tube 20 and the light emitting diode 30 of each driving unit 10 of the present embodiment can be integrally and simultaneously fabricated on a substrate, so as to simplify the process for fabricating the switch control tube 20 and the light emitting diode 30. Each driving unit 10 of this embodiment may include one switching control tube 20, and each driving unit 10 may include one or more light emitting diodes 30, which is not specifically limited in this embodiment, and may be set according to actual requirements when implemented. Optionally, each driving unit 10 may include a plurality of light emitting diodes 30, the plurality of light emitting diodes 30 may be connected in series or in parallel in one driving unit 10, and preferably, one switch control tube 20 of this embodiment may be connected to a plurality of light emitting diodes 30 connected in series, so that the currents of the light emitting diodes 30 connected in series may be the same, which is beneficial to further reducing the instantaneous operating current. It is understood that, in the embodiment, when the light emitting diodes 30 are connected in series or in parallel in one driving unit 10, the connection is not particularly limited, and may be selected according to actual requirements.
It is understood that, in the operation timing diagram of the driving circuit illustrated in fig. 2 of the present embodiment, only all the driving units 10 in the driving circuit are divided into two groups for illustration, and the operation time T of the first driving unit group 10A in fig. 2 is illustratedAAnd the operating time T of the second driving unit group 10BBThe sum of the working time of the two driving units is a driving scanning period T, and when the two groups of driving unit groups of all the driving units 10 in the driving circuit complete the driving operation, the driving scanning period T is entered into the next driving scanning period T.
In some optional embodiments, please refer to fig. 1, fig. 5 and fig. 6 in combination, fig. 5 is an enlarged structural schematic diagram of a driving unit in fig. 1, and fig. 6 is an operation timing diagram of the driving unit in fig. 5, in which the switching control transistor 20 in this embodiment is a field effect transistor, the first end 202 of the switching control transistor 20 is electrically connected to the cathode of the light emitting diode 30, the second end 203 of the switching control transistor 20 is electrically connected to the first voltage signal line 50, and the anode of the light emitting diode 30 is electrically connected to the second voltage signal line 60. Optionally, the first voltage signal line 50 is used for inputting a PVEE power signal to the driving unit 10, and the second voltage signal line 60 is used for inputting a PVDD power signal to the driving unit 10.
This embodiment further explains that in each driving unit 10, the switching control tube 20 may be a field effect transistor, the switching control tube 20 is used as a switching element to realize whether the light emitting diode 30 is powered on, the control terminals 201 of the switching control tube 20 are electrically connected to one driving signal line 40, the driving signal line 40 provides a PWM driving signal (Pulse Width Modulation) for each driving unit, that is, the driving signal line 40 may provide a Pulse Width Modulation signal through a driving chip (not shown), and different gray scales of the light emitting diode 30 are realized by adjusting different Pulse widths (duty ratios) of the PWM driving signals input by the driving chip, as shown in fig. 6, the larger the duty ratio is, the larger the brightness is. The second end 203 of the switch control tube 20 is electrically connected to the first voltage signal line 50, the anode of the light emitting diode 30 is electrically connected to the second voltage signal line 60, the first voltage signal line 50 is used for inputting a PVEE power signal to the driving unit 10, the second voltage signal line 60 is used for inputting a PVDD power signal to the driving unit 10, the PVDD power signal and the PVEE power signal can be provided by an external power supply, and the brightness (i.e., gray scale) of the light emitting diode 30 is controlled by the length of the power-on time of the light emitting diode 30.
The different gray scales of the light emitting diode 30 of this embodiment are realized by adjusting different pulse widths (duty ratios) of the PWM driving signals input by the driving chip, and the larger the duty ratio is, the larger the brightness is, the independent control of each driving unit 10 can be realized, the scanning driving control is not required, the control is simple, the flexibility and the dynamic response are good, and the improvement of the contrast ratio is facilitated.
Alternatively, as shown in fig. 5 and 6, the input voltage of the first voltage signal line 50 is zero, and the input voltage of the second voltage signal line 60 is greater than or equal to the threshold voltage of the light emitting diode 30. In the led 30 driven by the PWM method, the voltage value of the PVDD power signal depends on the threshold voltage of the led 30, so the input voltage of the second voltage signal line 60 needs to be greater than or equal to the threshold voltage of the led 30, while the voltage value of the PVEE power signal generally takes a zero potential, so the input voltage of the first voltage signal line 50 is zero.
Optionally, the switch control transistor 20 is a metal oxide semiconductor field effect transistor. The switch control transistor 20 of the present embodiment may be a Metal-Oxide-Semiconductor Field-effect transistor (MOSFET), which is a Field-effect transistor that can be widely used in analog circuits and digital circuits. The mosfet may be divided into an N-channel type with a majority of electrons and a P-channel type with a majority of holes according to their channel polarities, and are generally called an N-type metal oxide semiconductor field effect transistor (NMOSFET) and a P-type metal oxide semiconductor field effect transistor (PMOSFET). The switch control transistor 20 of the present embodiment is used as a switching element, and since the mosfet is a voltage control type device, it is advantageous to save power consumption.
In some alternative embodiments, please refer to fig. 7-9, fig. 7 is a schematic plane structure diagram of another driving circuit provided in the embodiment of the present invention, fig. 8 is a schematic plane structure diagram of another driving circuit provided in the embodiment of the present invention, fig. 9 is a schematic plane structure diagram of another driving circuit provided in the embodiment of the present invention (for clearly illustrating the grouping manner of the driving units 10 arranged in a plurality of arrays in the embodiment, each of the driving units 10 in fig. 7-9 is illustrated in a block diagram, and different driving unit groups are distinguished by different filling patterns in the diagram), in this embodiment, the driving units 10 arranged in a plurality of arrays are divided into at least two driving unit groups, the grouping manner of all the driving units 10 may be such that a plurality of the driving units 10 arranged in the first direction X form a first driving unit group 10A extending in the first direction X, the plurality of driving units 10 arranged in the first direction X form a second driving unit group 10B extending in the first direction X, and at least one first driving unit group 10A and at least one second driving unit group 10B are alternately arranged in a second direction Y, wherein the first direction X and the second direction Y intersect, and optionally, the first direction X and the second direction Y are perpendicular to each other.
Specifically, as shown in fig. 7, when the plurality of driving units 10 arranged in an array are divided into two groups of driving units, the first direction X may be a horizontal direction of the array structure, the second direction Y may be a vertical direction of the array structure, the plurality of driving units 10 arranged in the first direction X form a row of first driving unit groups 10A extending in the first direction X, the plurality of driving units 10 arranged in the first direction X form a row of second driving unit groups 10B extending in the first direction X, one first driving unit group 10A and one second driving unit group 10B are alternately arranged in the second direction Y, that is, in the second direction Y, the odd-numbered row driving units 10 of the array structure are first driving unit groups 10A, the even-numbered row driving units 10 of the array structure are second driving unit groups 10B, an operating time of the first driving unit group 10A does not overlap an operating time of the second driving unit groups 10B, the first driving unit group 10A and the second driving unit group 10B are staggered in driving timing, so that the occurrence of a transient large current can be avoided, the purpose of reducing power consumption is achieved, and the brightness of the light emitting diodes 30 of all the driving units 10 can be uniformized.
As shown in fig. 8, when the plurality of driving units 10 arranged in an array are divided into two groups of driving units, the first direction X may be a longitudinal direction of the array structure, the second direction Y may be a transverse direction of the array structure, the plurality of driving units 10 arranged in the first direction X form a column of first driving unit groups 10A extending in the first direction X, the plurality of driving units 10 arranged in the first direction X form a column of second driving unit groups 10B extending in the first direction X, one first driving unit group 10A and one second driving unit group 10B are alternately arranged in the second direction Y, that is, in the second direction Y, the odd-numbered column driving units 10 of the array structure are the first driving unit groups 10A, the even-numbered column driving units 10 of the array structure are the second driving unit groups 10B, an operating time of the first driving units 10A does not overlap an operating time of the second driving unit groups 10B, the first driving unit group 10A and the second driving unit group 10B are staggered in driving timing, so that the occurrence of a transient large current can be avoided, the purpose of reducing power consumption is achieved, and the brightness of the light emitting diodes 30 of all the driving units 10 can be uniformized.
As shown in fig. 9, when the plurality of driving units 10 arranged in an array are divided into two groups of driving units, the first direction X may also be a direction forming an acute angle with the horizontal direction of the array structure, alternatively, as shown in fig. 9, the first direction X forms an angle a with the horizontal direction of the array structure, a is an acute angle, and the first direction X and the second direction Y are perpendicular to each other. In this case, each row of driving units in the array structure is formed by alternately arranging the driving units in the first driving unit group 10A and the driving units in the second driving unit group 10B, for example, the first row in the array structure is the driving unit in the first driving unit group 10A, the second row is the driving unit in the second driving unit group 10B, the third row is the driving unit in the first driving unit group 10A, the fourth row is the driving unit … … in the second driving unit group 10B, the first row in the array structure is the driving unit in the second driving unit group 10B, the second row is the driving unit in the first driving unit group 10A, the third row is the driving unit in the second driving unit group 10B, the fourth row is the driving unit … … in the first driving unit group 10A, and so on, the operation time of the first driving unit group 10A does not overlap with the operation time of the second driving unit group 10B, the first driving unit group 10A and the second driving unit group 10B are staggered in driving timing, so that the occurrence of a transient large current can be avoided, the purpose of reducing power consumption can be achieved, and the brightness of the light emitting diodes 30 of all the driving units 10 can be further uniformized.
It should be noted that, in fig. 7-9 of this embodiment, only the driving units 10 arranged in the plurality of arrays are divided into two groups of driving unit groups for example to explain the beneficial effects of this embodiment, in a specific implementation, the number of all the driving units 10 arranged in the groups may be three or more, as shown in fig. 10-12, fig. 10 is a schematic plane structure diagram of another driving circuit provided in this embodiment, fig. 11 is a schematic plane structure diagram of another driving circuit provided in this embodiment, fig. 12 is a schematic plane structure diagram of another driving circuit provided in this embodiment, the driving units 10 arranged in the plurality of arrays are divided into three groups of driving unit groups, which are respectively a third driving unit group 10C, a fourth driving unit group 10D, and a fifth driving unit group 10E, the grouping manner of the three groups of driving unit groups may be as shown in fig. 10-12, in this embodiment, the number of all the driving units 10 set in groups is not specifically limited, and only the groups are required to be staggered in driving timing sequence and to be arranged in a regular manner, so as to achieve the purpose of uniform brightness.
In some alternative embodiments, please refer to fig. 1-2, 4-12 and fig. 13 in combination, fig. 13 is a schematic workflow diagram of a driving method according to an embodiment of the present invention, where the driving method is used to drive the driving circuit 000 in the above embodiments to work;
the driving method of the present embodiment includes:
s11: calculating the gray scale of the light emitting diode in each driving unit corresponding to the picture to be displayed according to the picture to be displayed;
s12: dividing each driving unit into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group;
s13: respectively controlling the light emitting diodes in each first driving unit group and each second driving unit group to emit light according to the calculated different gray scales of the light emitting diodes in each driving unit;
wherein the operation time of the first driving unit group does not overlap with the operation time of the second driving unit group. Alternatively, the operation time of the first driving unit group 10A and the operation time of the second driving unit group 10B do not overlap within one frame display screen.
The driving method provided by the present embodiment is used for the driving circuit 000 in the above embodiments to complete the driving operation. First, according to the image to be displayed, different gray scales of the light emitting diodes 30 in the driving units 10 corresponding to the image to be displayed are calculated. The individual drive units 10 are then divided into a plurality of groups of drive units,the plurality of driving unit groups at least include a first driving unit group 10A and a second driving unit group 10B, and optionally, each driving unit 10 is divided into a plurality of driving unit groups, and a specific grouping manner may refer to the embodiments shown in fig. 7 to 12, which is not described herein again. The plurality of driving units 10 arranged in the first direction X are divided into a first driving unit group 10A, the plurality of driving units 10 arranged in the first direction X are divided into a second driving unit group 10B, and at least one first driving unit group 10A and at least one second driving unit group 10B are alternately arranged in a second direction Y, wherein the first direction X and the second direction Y intersect, and optionally the first direction X and the second direction Y are perpendicular to each other. Finally, according to the calculated different gray scales of the leds 30 in each driving unit 10, the leds in each first driving unit group 10A and each second driving unit group 10B are controlled to emit light, the working time of each first driving unit group 10A does not overlap with the working time of each second driving unit group 10B, and the working time T of any second driving unit group 10BBThe operation time T of two adjacent first driving unit groups 10AAIn between, the operation time T of any one of the first drive unit groups 10A may beAWorking time T of two adjacent second driving unit groups 10BBThe situation of generating instantaneous large current is avoided, the purpose of reducing power consumption at the same moment is achieved, and the low-power-consumption effect is achieved.
It should be noted that the operation time T of any one of the first driving unit groups 10AAWorking time T of two adjacent second driving unit groups 10BBMeanwhile, it is understood that, in the whole driving circuit 000, all the first driving unit groups 10A may be controlled to complete the driving operation at the same time (the gray scales of the driving units of all the first driving unit groups 10A are different by the different pulse widths fed through the driving signal lines 40), and then all the second driving unit groups 10B may be controlled to complete the driving operation at the same time (the gray scales of the driving units of all the second driving unit groups 10B are different by the different pulse widths fed through the driving signal lines 40), or, in the whole driving circuit 000, all the second driving unit groups 10A may be controlled to complete the driving operation at the same time at firstThe unit group 10B completes the driving operation, and then controls all the first driving unit groups 10A to complete the driving operation at the same time, thereby realizing that the operation time of each first driving unit group 10A does not overlap with the operation time of each second driving unit group 10B.
It is understood that, in the operation timing diagram of the driving circuit illustrated in fig. 2 of the present embodiment, only all the driving units 10 in the driving circuit are divided into two groups for illustration, and the operation time T of the first driving unit group 10A in fig. 2 is illustratedAAnd the operating time T of the second driving unit group 10BBThe sum of the working time of the two driving units is a driving scanning period T, and when the two groups of driving unit groups of all the driving units 10 in the driving circuit complete the driving operation, the driving scanning period T is entered into the next driving scanning period T.
In some alternative embodiments, please refer to fig. 1-2, 4-12 and fig. 14 in combination, fig. 14 is a schematic workflow diagram of another driving method provided in the embodiment of the present invention, and the driving method of the present embodiment is used for driving the driving circuit 000 in the above embodiments to work;
the driving method of the present embodiment includes:
s21: calculating the gray scale of the light emitting diode in each driving unit corresponding to the picture to be displayed according to the picture to be displayed;
s22: dividing each driving unit into a plurality of first driving units and a plurality of second driving units according to the calculated gray scale of the light emitting diode in each driving unit, wherein the gray scale of the light emitting diode in the first driving unit is equal to 0, and the gray scale of the light emitting diode in the second driving unit is greater than 0;
s23: dividing the plurality of second-type driving units into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group;
s24: respectively controlling the light emitting diodes in each first driving unit group and each second driving unit group to emit light according to the calculated different gray scales of the light emitting diodes in each driving unit;
wherein the operation time of the first driving unit group does not overlap with the operation time of the second driving unit group. Alternatively, the operation time of the first driving unit group 10A and the operation time of the second driving unit group 10B do not overlap within one frame display screen.
The driving method provided by the present embodiment is used for the driving circuit 000 in the above embodiments to complete the driving operation. First, according to the image to be displayed, different gray scales of the light emitting diodes 30 in the driving units 10 corresponding to the image to be displayed are calculated. Then, according to the calculated gray scale of the light emitting diode 30 in each driving unit 10, dividing each driving unit 10 into a plurality of first driving units and a plurality of second driving units, wherein the gray scale of the light emitting diode in the first driving unit is equal to 0, and the gray scale of the light emitting diode in the second driving unit is greater than 0, that is, by the calculated gray scale of the light emitting diode 30 in each driving unit 10 corresponding to the picture to be displayed, the second driving unit to be lightened and the first driving unit to be darkened or darkened are divided, wherein each driving unit of the first driving unit is an area where different pulse widths (duty ratios) of the PWM driving signals input by the driving chip are 0, so that additional driving for resources is not needed, and power consumption can be further reduced. Then, the plurality of second driving units are divided into a plurality of driving unit groups, where the plurality of driving unit groups at least include the first driving unit group 10A and the second driving unit group 10B, and optionally, each driving unit 10 in the second driving units with gray scale not equal to 0 is divided into a plurality of driving unit groups, and the specific grouping manner may refer to the embodiments shown in fig. 7 to 12, which is not described herein again. The plurality of driving units 10 arranged in the first direction X are divided into a first driving unit group 10A, the plurality of driving units 10 arranged in the first direction X are divided into a second driving unit group 10B, and at least one first driving unit group 10A and at least one second driving unit group 10B are alternately arranged in a second direction Y, wherein the first direction X and the second direction Y intersect, and optionally the first direction X and the second direction Y are perpendicular to each other. Finally, according to the calculated different gray scales of the light emitting diodes 30 in each driving unit 10 of the second driving units with the gray scale not equal to 0, respectively controlling each first driving unit group 10A and each second driving unit group 10AThe light emitting diodes 30 in the unit group 10B emit light, and the operation time of each first driving unit group 10A does not overlap with the operation time of each second driving unit group 10B, and the operation time T of any one second driving unit group 10BBThe operation time T of two adjacent first driving unit groups 10AAIn between, the operation time T of any one of the first drive unit groups 10A may beAWorking time T of two adjacent second driving unit groups 10BBThe power consumption reduction at the same moment is achieved by avoiding the occurrence of the condition of generating instantaneous large current, and the dark or black first driving units are eliminated, so that the resources do not need to be additionally driven, and then all the driving units of the second driving units needing to be lightened are grouped, and the power consumption is further reduced.
Optionally, referring to fig. 1-2 and 4-6, in the driving method of the driving circuit of the present embodiment, each driving unit 10 includes a switch control tube 20 and a light emitting diode 30 that are electrically connected, a control end 201 of each switch control tube 20 is electrically connected to a driving signal line 40, the driving signal line 40 provides a PWM driving signal (Pulse Width Modulation) for each driving unit 10, and the gray scale of the light emitting diode 30 is controlled by adjusting the duty ratio of the PWM driving signal. Optionally, the first end 202 of the switch control tube 20 is electrically connected to the cathode of the light emitting diode 30, the second end 203 of the switch control tube 20 is electrically connected to the first voltage signal line 50, the anode of the light emitting diode 30 is electrically connected to the second voltage signal line 60, the first voltage signal line 50 is used for inputting a PVEE power signal to the driving unit 10, and the second voltage signal line 60 is used for inputting a PVDD power signal to the driving unit 10.
In the driving method of the driving circuit, the embodiment further explains that when the driving circuit works, the switching control tube 20 is used as a switching element to realize whether the light emitting diode 30 is powered on or not, the control terminals 201 of the switching control tube 20 are all electrically connected with one driving signal line 40, the driving signal line 40 provides a PWM driving signal for each driving unit, that is, the driving signal line 40 can provide a pulse width modulation signal through a driving chip, and realize different gray scales of the light emitting diode 30 by adjusting different pulse widths (duty ratios) of the PWM driving signals input by the driving chip, and the larger the duty ratio is, the larger the brightness is. The second end 203 of the switch control tube 20 is electrically connected to the first voltage signal line 50, the anode of the light emitting diode 30 is electrically connected to the second voltage signal line 60, the first voltage signal line 50 is used for inputting a PVEE power signal to the driving unit 10, the second voltage signal line 60 is used for inputting a PVDD power signal to the driving unit 10, the PVDD power signal and the PVEE power signal can be provided by an external power supply, and the brightness (i.e., gray scale) of the light emitting diode 30 is controlled by the length of the power-on time of the light emitting diode 30. The different gray scales of the light emitting diode 30 of this embodiment are realized by adjusting different pulse widths of the pulse width modulation signal input by the driving chip, and the larger the duty ratio is, the larger the brightness is, the independent control of each driving unit 10 can be realized, the scanning driving control is not required, the control is simple, the flexibility and the dynamic response are good, and the improvement of the contrast ratio is facilitated.
Optionally, please refer to fig. 1-2, 4-12, fig. 15 and fig. 16 in combination, where fig. 15 is a schematic plan structure diagram of another driving circuit provided in an embodiment of the present invention, fig. 16 is a schematic workflow diagram of a driving method of the driving circuit in fig. 15, and the driving method of the present embodiment is used to drive the driving circuit 000 in the above embodiment to operate; as shown in fig. 15 and 16, the drive circuit of the present embodiment may employ a drive method including:
s31: dividing all the driving units of the driving circuit into a plurality of partitions, wherein each partition comprises a plurality of driving units;
s32: calculating the gray scale of the light emitting diode of each driving unit in each partition corresponding to the picture to be displayed according to the picture to be displayed;
s33: selecting the light-emitting brightness of the driving unit in each partition according to the gray scale of the content of the picture to be displayed corresponding to the partition to obtain a part of partition corresponding to the dark part in the content of the picture to be displayed, and not providing a driving signal for the part of partition corresponding to the dark part in the content of the picture to be displayed;
s34: dividing each driving unit in each remaining partition into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group;
s35: respectively controlling the light emitting diodes in the first driving unit groups and the second driving unit groups to emit light according to the calculated different gray scales of the light emitting diodes in the driving units in each partition;
wherein the operation time of the first driving unit group and the operation time of the second driving unit group within each partition do not overlap.
Specifically, in the driving method of the present embodiment, first, all the driving units 10 of the driving circuit are divided into a plurality of zones ZA, and one zone ZA may correspond to a plurality of driving units 10, that is, one zone ZA may include a plurality of driving units 10; then, according to the picture to be displayed, calculating the gray scale of the light emitting diode of each driving unit 10 in each zone ZA corresponding to the picture to be displayed; then, according to the gray scale of the content of the picture to be displayed corresponding to the subarea ZA, selecting the light-emitting brightness of the driving unit 10 in each subarea ZA to obtain a part of subarea corresponding to the dark part in the content of the picture to be displayed, and not providing a driving signal for the part of subarea corresponding to the dark part in the content of the picture to be displayed; optionally, the brightness of the highlighted portion in the content of the display frame may be maximized, while the dark portion may be reduced in brightness, or even turned off, i.e. no driving signal is provided; next, dividing each of the driving units 10 in each of the remaining zones ZA into a plurality of driving unit groups, including at least a first driving unit group 10A and a second driving unit group 10B; finally, according to the calculated different gray scales of the light emitting diodes in each driving unit 10 in each zone ZA, the light emitting diodes in each first driving unit group 10A and each second driving unit group 10B are respectively controlled to emit light; wherein the operation times of the first driving unit group 10A and the second driving unit group 10B within each zone ZA do not overlap. Alternatively, the operation time of the first driving unit group 10A and the operation time of the second driving unit group 10B do not overlap within one frame display screen.
When the driving circuit of this embodiment is applied to a backlight, a local dimming technique (local divisional dimming technique) may be adopted as a driving method to divide all driving units 10 of the backlight into a plurality of subareas ZA (small areas), and during driving, the light-emitting brightness of the driving unit 10 in each subarea ZA is selected according to the gray scale of the content of the picture to be displayed corresponding to the subarea ZA, so as to obtain a part of subareas corresponding to the dark part in the content of the picture to be displayed, and no driving signal is provided for a part of subareas corresponding to the dark part in the content of the picture to be displayed, wherein the brightness of the highlight part in the content of the picture to be displayed may be maximized, and the dark part may be reduced in brightness or even turned off, i.e., no driving signal is provided, so as to achieve the purposes of saving energy, enhancing the picture quality, and improving the contrast. In this case, several driving units 10 of the present embodiment may correspond to one zone ZA (small area) in the partitioning technique, and the grouping of the driving units 10 in the remaining zones may be further divided into different driving unit groups (different driving unit groups are represented by different filling patterns in fig. 15) for each zone ZA.
It should be noted that fig. 15 of this embodiment only illustrates the driving method of this embodiment by taking an example that one zone ZA may include 16 driving units 10, and when the driving method is implemented, the driving method may be set according to actual choice, and this embodiment is not limited in particular. It can be understood that, in the driving method of this embodiment, after all the driving units 10 are partitioned, different driving unit groups are further partitioned for each partition ZA, and the grouping manner of the driving unit groups may refer to the description of the above embodiment, which is not described herein again.
In some alternative embodiments, please refer to fig. 17, where fig. 17 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device according to the embodiment includes the driving circuit 000 according to the above embodiment of the present invention. The embodiment of fig. 17 is only an example of a mobile phone, and the display device 111 is described, it is understood that the display device 111 provided in the embodiment of the present invention may be another display device 111 having a display function, such as a computer, a television, and a vehicle-mounted display device, and the present invention is not limited thereto. The display device 111 provided in the embodiment of the present invention has the beneficial effects of the driving circuit 000 provided in the embodiment of the present invention, and specific descriptions of the driving circuit 000 in the above embodiments may be specifically referred to, and this embodiment is not described herein again. Alternatively, the display device 111 may include a liquid crystal display panel and a backlight module, which are oppositely disposed, where the backlight module may include the driving circuit 000 in the above embodiment. Optionally, the display device 111 may include a Micro LED display panel or a Mini LED display panel, and the Micro LED display panel or the Mini LED display panel includes the driving circuit 000 in the above embodiment, and the specific structure of the display device 111 is not specifically limited in this embodiment, so that the driving circuit 000 may be applied to each of the above display devices, and the display device has the beneficial effects of the driving circuit 000 in the above embodiment, which is not described herein again.
As can be seen from the above embodiments, the driving circuit, the driving method thereof, and the display device provided by the present invention at least achieve the following advantages:
in the invention, each driving unit is led out a driving signal line independently, each driving signal line needs to input a driving signal to the control end of the switch control tube independently, the brightness (i.e. gray scale) of the light-emitting diode can be controlled by the length of the power-on time of the light-emitting diode, the switch control tube is used as a switch element to realize whether the light-emitting diode is powered on or not, the length of the power-on time of the light-emitting diode can be adjusted by different driving signals input by the driving signal lines, the independent control of the driving unit can be realized, the scanning driving control is not needed, the light-emitting brightness of the light-emitting diode is directly controlled by inputting different driving signals by the respective driving signal lines, the control is simple, flexible and. The driving units arranged in the array at least comprise a first driving unit group and a second driving unit group, the working time of the first driving unit group is not overlapped with the working time of the second driving unit group, namely the working time of any second driving unit group is positioned between the working times of two adjacent first driving unit groups, or the working time of any first driving unit group is positioned between the working times of two adjacent second driving unit groups, so that the condition of generating instantaneous large current can be avoided, the purpose of reducing the power consumption at the same moment is achieved, and the effect of low power consumption is favorably realized.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (14)
1. A driver circuit, comprising: the driving units are arranged in an array mode, each driving unit comprises a switch control tube and a light emitting diode which are electrically connected, and the control end of each switch control tube is electrically connected with one driving signal wire;
the driving units arranged in the array at least comprise a first driving unit group and a second driving unit group, and the working time of the first driving unit group is not overlapped with that of the second driving unit group.
2. The drive circuit according to claim 1,
the working time of any one second driving unit group is positioned between the working times of two adjacent first driving unit groups.
3. The drive circuit according to claim 1,
a plurality of the driving units arranged in a first direction form the first driving unit group extending in the first direction, a plurality of the driving units arranged in the first direction form the second driving unit group extending in the first direction, and at least one of the first driving unit group and at least one of the second driving unit group are alternately arranged in a second direction, wherein the first direction and the second direction intersect.
4. The driving circuit of claim 1, wherein the switch control transistor is a field effect transistor, a first terminal of the switch control transistor is electrically connected to a negative electrode of the light emitting diode, a second terminal of the switch control transistor is electrically connected to a first voltage signal line, and an anode of the light emitting diode is electrically connected to a second voltage signal line.
5. The driving circuit according to claim 4, wherein an input voltage of the first voltage signal line is zero, and an input voltage of the second voltage signal line is greater than or equal to a threshold voltage of the light emitting diode.
6. The drive circuit according to claim 1, wherein the drive signal line supplies a PWM drive signal to each of the drive units.
7. The driving circuit as claimed in claim 1, wherein the switch control transistor is a metal oxide semiconductor field effect transistor.
8. The driving circuit of claim 1, wherein the light emitting diode is any one of a sub-millimeter light emitting diode or a micro light emitting diode.
9. A driving method of a driving circuit, wherein the driving method is used for driving the driving circuit according to any one of claims 1 to 8;
the driving method includes:
calculating the gray scale of the light emitting diode in each driving unit corresponding to the picture to be displayed according to the picture to be displayed;
dividing each of the driving units into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group;
respectively controlling the light emitting diodes in the first driving unit group and the second driving unit group to emit light according to the calculated different gray scales of the light emitting diodes in the driving units;
wherein an operation time of the first driving unit group does not overlap with an operation time of the second driving unit group.
10. The driving method of the driving circuit according to claim 9, wherein the driving units are divided into a plurality of driving unit groups, specifically:
dividing a plurality of the driving units arranged in a first direction into the first driving unit groups, dividing a plurality of the driving units arranged in the first direction into the second driving unit groups, and alternately arranging at least one of the first driving unit groups and at least one of the second driving unit groups in a second direction, wherein the first direction and the second direction intersect.
11. A driving method of a driving circuit, wherein the driving method is used for driving the driving circuit according to any one of claims 1 to 8;
the driving method includes:
calculating the gray scale of the light emitting diode in each driving unit corresponding to the picture to be displayed according to the picture to be displayed;
dividing each driving unit into a plurality of first driving units and a plurality of second driving units according to the calculated gray scale of the light emitting diode in each driving unit, wherein the gray scale of the light emitting diode in the first driving unit is equal to 0, and the gray scale of the light emitting diode in the second driving unit is greater than 0;
dividing the plurality of driving units of the second type into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group;
respectively controlling the light emitting diodes in the first driving unit group and the second driving unit group to emit light according to the calculated different gray scales of the light emitting diodes in the driving units;
wherein an operation time of the first driving unit group does not overlap with an operation time of the second driving unit group.
12. A driving method of a driving circuit, wherein the driving method is used for driving the driving circuit according to any one of claims 1 to 8;
the driving method includes:
dividing all the driving units of the driving circuit into a plurality of partitions, each partition including a plurality of the driving units;
calculating the gray scale of the light emitting diode of each driving unit in each partition corresponding to the picture to be displayed according to the picture to be displayed;
selecting the light-emitting brightness of the driving unit in each partition according to the gray scale of the content of the picture to be displayed corresponding to the partition to obtain a part of the partition corresponding to the dark part in the content of the picture to be displayed, and not providing a driving signal for the part of the partition corresponding to the dark part in the content of the picture to be displayed;
dividing each driving unit in each of the remaining partitions into a plurality of driving unit groups, wherein the plurality of driving unit groups at least comprise a first driving unit group and a second driving unit group;
respectively controlling the light emitting diodes in the first driving unit group and the second driving unit group to emit light according to the calculated different gray scales of the light emitting diodes in the driving units in each partition;
wherein an operation time of the first driving unit group within each of the partitions does not overlap with an operation time of the second driving unit group.
13. The driving method of the driving circuit according to any one of claims 9, 11 or 12, wherein each of the driving units includes a switch control tube and a light emitting diode electrically connected, a control terminal of each of the switch control tubes is electrically connected to a driving signal line, the driving signal line provides a PWM driving signal for each of the driving units, and a gray scale of the light emitting diode is controlled by adjusting a duty ratio of the PWM driving signal.
14. A display device characterized in that the display device comprises a driver circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010475249.3A CN111583877A (en) | 2020-05-29 | 2020-05-29 | Driving circuit, driving method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010475249.3A CN111583877A (en) | 2020-05-29 | 2020-05-29 | Driving circuit, driving method thereof and display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111583877A true CN111583877A (en) | 2020-08-25 |
Family
ID=72127247
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010475249.3A Pending CN111583877A (en) | 2020-05-29 | 2020-05-29 | Driving circuit, driving method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111583877A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112331137A (en) * | 2020-09-14 | 2021-02-05 | 汕头超声显示器技术有限公司 | Partition driving LED display screen |
| CN112599092A (en) * | 2020-12-31 | 2021-04-02 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel, driving method thereof and organic light emitting display device |
| US11615765B2 (en) | 2021-01-20 | 2023-03-28 | Wistron Corporation | Direct-lit LED backlight display and light emission control method therefor |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050120870A (en) * | 2004-06-21 | 2005-12-26 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device and driving method thereof and driving circuit of lamp for liquid crystal display device |
| CN101494030A (en) * | 2008-01-24 | 2009-07-29 | 财团法人工业技术研究院 | Backlight control apparatus and method for controlling the backlight device |
| WO2011129094A1 (en) * | 2010-04-16 | 2011-10-20 | パナソニック株式会社 | Liquid crystal display device and drive method for backlight of liquid crystal display device |
| CN103854613A (en) * | 2014-02-14 | 2014-06-11 | 北京京东方显示技术有限公司 | Light source control module, back light module, drive method of back light module, and display device |
| CN105788539A (en) * | 2016-05-20 | 2016-07-20 | 京东方科技集团股份有限公司 | Backlight adjusting method and system, backlight modules and display device |
| CN107919092A (en) * | 2016-10-10 | 2018-04-17 | 群创光电股份有限公司 | Display device |
| JP2019040135A (en) * | 2017-08-28 | 2019-03-14 | シャープ株式会社 | Display and television receiving set |
| CN110033732A (en) * | 2019-05-14 | 2019-07-19 | 上海天马微电子有限公司 | Micro light-emitting diode display panel, driving method and display device |
-
2020
- 2020-05-29 CN CN202010475249.3A patent/CN111583877A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050120870A (en) * | 2004-06-21 | 2005-12-26 | 엘지.필립스 엘시디 주식회사 | Liquid crystal display device and driving method thereof and driving circuit of lamp for liquid crystal display device |
| CN101494030A (en) * | 2008-01-24 | 2009-07-29 | 财团法人工业技术研究院 | Backlight control apparatus and method for controlling the backlight device |
| WO2011129094A1 (en) * | 2010-04-16 | 2011-10-20 | パナソニック株式会社 | Liquid crystal display device and drive method for backlight of liquid crystal display device |
| CN103854613A (en) * | 2014-02-14 | 2014-06-11 | 北京京东方显示技术有限公司 | Light source control module, back light module, drive method of back light module, and display device |
| CN105788539A (en) * | 2016-05-20 | 2016-07-20 | 京东方科技集团股份有限公司 | Backlight adjusting method and system, backlight modules and display device |
| CN107919092A (en) * | 2016-10-10 | 2018-04-17 | 群创光电股份有限公司 | Display device |
| JP2019040135A (en) * | 2017-08-28 | 2019-03-14 | シャープ株式会社 | Display and television receiving set |
| CN110033732A (en) * | 2019-05-14 | 2019-07-19 | 上海天马微电子有限公司 | Micro light-emitting diode display panel, driving method and display device |
Non-Patent Citations (2)
| Title |
|---|
| 李裕华 马慧敏: "《FPGA硬件软件设计及项目开发》", 30 September 2014, 西安交通大学出版社 * |
| 谢完成 等: "《液晶电视机电路分析与维修》", 30 September 2016, 北京理工大学出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112331137A (en) * | 2020-09-14 | 2021-02-05 | 汕头超声显示器技术有限公司 | Partition driving LED display screen |
| CN112331137B (en) * | 2020-09-14 | 2021-08-31 | 汕头超声显示器技术有限公司 | Partition driving LED display screen |
| CN112599092A (en) * | 2020-12-31 | 2021-04-02 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel, driving method thereof and organic light emitting display device |
| US11615765B2 (en) | 2021-01-20 | 2023-03-28 | Wistron Corporation | Direct-lit LED backlight display and light emission control method therefor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111696488B (en) | Drive circuit, display panel and display module | |
| US6633270B2 (en) | Display device | |
| CN111583877A (en) | Driving circuit, driving method thereof and display device | |
| KR20040005163A (en) | Organic electroluminescence device and method for driving the same | |
| KR20040019207A (en) | Organic electro-luminescence device and apparatus and method driving the same | |
| CN111243496A (en) | Pixel circuit, driving method thereof and display device | |
| CN110972495A (en) | Light-emitting driving substrate, manufacturing method thereof, light-emitting substrate and display device | |
| CN113409727A (en) | Pixel driving circuit, display panel, control method of display panel and display device | |
| CN111599318B (en) | Display device and driving method thereof | |
| CN109216425B (en) | Display panel and display device | |
| KR100618574B1 (en) | Drive circuit organic electro luminescent display | |
| CN110534054B (en) | Display driving method and device, display device, storage medium and chip | |
| JP7362889B2 (en) | display device | |
| US7205968B2 (en) | Organic electroluminescence device and method for fabricating thereof | |
| US11756484B2 (en) | Light-emitting panel, driving method of light-emitting panel, and display device | |
| US20060017666A1 (en) | Multi-panel display device and method of driving the same | |
| CN111103726B (en) | Backlight, display device and backlight control method | |
| US7184005B2 (en) | Image display apparatus | |
| CN214099116U (en) | Drive circuit, light-emitting substrate and display device | |
| CN114639347A (en) | Pixel driving circuit, driving method and display device | |
| CN114373778A (en) | Light-emitting panel and display device | |
| CN113299232A (en) | Display panel, driving method thereof and display device | |
| CN112992083A (en) | Drive circuit, display panel and display device | |
| US12061395B2 (en) | Flat lighting device and display device using light-emitting diode | |
| US12067930B2 (en) | Light-emitting panel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |