CN109192145A - A kind of subregion light adjusting circuit and display device - Google Patents
A kind of subregion light adjusting circuit and display device Download PDFInfo
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- CN109192145A CN109192145A CN201811109636.4A CN201811109636A CN109192145A CN 109192145 A CN109192145 A CN 109192145A CN 201811109636 A CN201811109636 A CN 201811109636A CN 109192145 A CN109192145 A CN 109192145A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/10—Intensity circuits
Abstract
The present invention is suitable for field of display technology, a kind of subregion light adjusting circuit and display device are provided, comprising: M current regulating module, the serial synchronous control signal input of each current regulating module is electrically connected with the serial synchronous control signal output of main decoder module, and each current regulating module is electrically connected with one group of luminescence unit；And power conversion module, the power conversion module access power supply, are also electrically connected respectively with luminescence unit described in each current regulating module and every group, the power conversion module is respectively the power supply of luminescence unit described in each current regulating module and every group.The embodiment of the present invention can realize the subregion brightness adjustment control to all luminescence units, make to include that dynamic brightness abundant and contrast is presented in the display devices of these luminescence units.
Description
Technical field
The invention belongs to field of display technology more particularly to a kind of subregion light modulation (Local DIM HDR) circuit and displays
Device.
Background technique
With the continuous development of display technology, the display devices such as liquid crystal display panel, display, television set are constantly towards frivolous
Change, low-power consumption, low cost direction develop.Display device will realize higher brightness and contrast, it usually needs pass through software
Or hardware driving parameter regulation mode dims display device, improves the brightness change range of display device.
However, existing software-based dimming mode regulating effect is undesirable, it is difficult to realize that large range of brightness becomes
Change, it is limited to the promotion effect of brightness and contrast；Structure is complicated for hardware based dimming mode, wiring is cumbersome, at high cost.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of subregion light adjusting circuit and display device, to solve existing base
It is undesirable in the dimming mode regulating effect of software, it is difficult to realize large range of brightness change, brightness and contrast is mentioned
Ascending effect is limited；The problem that structure is complicated for hardware based dimming mode, wiring is cumbersome, at high cost.
The first aspect of the embodiment of the present invention provides a kind of subregion light adjusting circuit comprising M current regulating module, often
The serial synchronous control signal output of the serial synchronous control signal input and main decoder module of a current regulating module
End electrical connection, each current regulating module are electrically connected with one group of luminescence unit；And
Power conversion module, the power conversion module access power supply, also respectively with each current regulating module and
The electrical connection of luminescence unit described in every group, the power conversion module is respectively hair described in each current regulating module and every group
Light unit power supply；
Wherein, M >=1 and be integer, main decoder module output serial synchronous controls signal to the electric current tune
Module is saved, each current regulating module is controlled and adjusts the electricity that its corresponding luminescence unit is inputted from the power conversion module
Stream carries out independent dimming with the luminescence unit described in every group.
In one embodiment, the subregion light adjusting circuit further includes control module, the serial letter of the control module
Number input terminal is electrically connected with the serial signal output end of the main decoder module, the synchronous control signal input of the control module
End be electrically connected with the synchronous control signal output end of the main decoder module, the control module also with the power conversion module
Electrical connection, the serial synchronous control signal output of the control module are serial same with each current regulating module respectively
The electrical connection of step control signal input terminal.
In one embodiment, the power conversion module includes:
The power input of first DC-DC converting unit, the first DC-DC converting unit terminates power supply, the first DC-
First power output end of DC converting unit is electrically connected with the first power input of each current regulating module respectively, institute
The second source output end for stating the first DC-DC converting unit is electrically connected with luminescence unit described in every group respectively；
2nd DC-DC converting unit, the power input and the first DC-DC of the 2nd DC-DC converting unit turn
Change the power end electrical connection of unit, the power output end of the 2nd DC-DC converting unit and the first electricity of the control module
Source input terminal and the electrical connection of the second source input terminal of each current regulating module；And
3rd DC-DC converting unit, the power input and the 2nd DC-DC of the 3rd DC-DC converting unit turn
Change the power output end electrical connection of unit, the of the power output end of the 3rd DC-DC converting unit and the control module
Two power inputs and the electrical connection of the third power input of each current regulating module.
In one embodiment, the first DC-DC converting unit includes:
Step-down rectifier subelement, the power input of the step-down rectifier subelement are the first DC-DC converting unit
Power input, the power end of the step-down rectifier subelement is the power end of the first DC-DC converting unit；
DC-DC conversion subunit, the power input of the DC-DC conversion subunit and the step-down rectifier subelement
Power output end be electrically connected, the first power output end of the DC-DC conversion subunit is the first DC-DC converting unit
The first power output end, the second source output end of the DC-DC conversion subunit is the first DC-DC converting unit
Second source output end.
In one embodiment, the step-down rectifier subelement includes DC socket and first capacitor~the 4th capacitor；
Step-down rectifier that is electrically connected to form of the power input of the DC socket and the anode of the first capacitor
The power input of unit；
The anode of second capacitor is electrically connected with the anode of the anode of the first capacitor and the third capacitor；
The power end of the just extremely described step-down rectifier subelement of the third capacitor；
The power output end of the just extremely described step-down rectifier subelement of 4th capacitor and with the third capacitor
Anode electrical connection；
The power output end of the DC socket, the cathode of the first capacitor, the cathode of second capacitor, the third
The cathode of the cathode of capacitor and the 4th capacitor is electrically connected to ground.
In one embodiment, the DC-DC conversion subunit includes the first DC-DC conversion chip, first resistor~the
Six resistance, the 5th capacitor~the tenth capacitor and the first inductance；
The power input of the first DC-DC conversion chip and one end of the first resistor are electrically connected to form described
The power input of DC-DC conversion subunit, the enable end of the first DC-DC conversion chip are another with the first resistor
End electrical connection, the frequency of oscillation end of the first DC-DC conversion chip and one end of the second resistance and the 6th capacitor
Anode electrical connection, the boost terminal of the first DC-DC conversion chip is electrically connected with the positive of the 7th capacitor, described first
The power output end of DC-DC conversion chip is electrically connected with one end of the anode of the 8th capacitor and first inductance, described
The common ground of first DC-DC conversion chip is grounded, the frequency of oscillation end of the first DC-DC conversion chip and the 8th capacitor
Cathode electrical connection, one end and the described 4th of the pressure feedback port of the first DC-DC conversion chip and the 3rd resistor
One end of resistance is electrically connected；
The other end of the second resistance is electrically connected with the anode of the 5th capacitor；
The other end of the 3rd resistor is electrically connected to the cathode of the 9th capacitor and the cathode of the tenth capacitor
Ground；
The other end of 4th resistance is electrically connected with one end of one end of the 5th resistance and the 6th resistance；
The anode of the other end of 5th resistance and the 9th capacitor and the anode of the tenth capacitor and described the
The other end of one inductance is electrically connected；
The other end of 6th resistance is the second source output end of the DC-DC conversion subunit；
Cathode, the cathode of the 6th capacitor and the cathode of the 7th capacitor of 5th capacitor are electrically connected to ground；
First power output end of the just extremely described DC-DC conversion subunit of the tenth capacitor.
In one embodiment, the 2nd DC-DC converting unit includes the 2nd DC-DC conversion chip, the 11st capacitor
~the ten nine capacitor, the 7th resistance~the tenth resistance and the second inductance；
The power input of the 2nd DC-DC conversion chip and positive, described 12nd electricity of the 11st capacitor
One end of positive and described 7th resistance of positive, described 13rd capacitor of appearance is electrically connected to form the 2nd DC-DC conversion
The enable end of the power input of unit, the 2nd DC-DC conversion chip is electrically connected with the other end of the 7th resistance, institute
The frequency of oscillation end and one end of the 8th resistance and the anode of the 15th capacitor for stating the 2nd DC-DC conversion chip are electrically connected
It connects, the boost terminal of the 2nd DC-DC conversion chip is electrically connected with the anode of the 16th capacitor, and the 2nd DC-DC turns
It changes the power output end of chip to be electrically connected with one end of the anode of the 17th capacitor and second inductance, described second
The common ground of DC-DC conversion chip is grounded, frequency of oscillation end and the 17th capacitor of the 2nd DC-DC conversion chip
Cathode electrical connection, the pressure feedback port of the 2nd DC-DC conversion chip and one end of the 9th resistance and the tenth electricity
One end of resistance is electrically connected；
The cathode of the cathode of 11st capacitor, the cathode of the 12nd capacitor and the 13rd capacitor is electrically connected
Yu Di；
The anode of 14th capacitor is electrically connected with the other end of the 8th resistance, the cathode of the 14th capacitor
It is electrically connected to ground with the cathode of the 15th capacitor and the cathode of the 16th capacitor；
The anode and the other end of positive, described tenth resistance of the 19th capacitor of 18th capacitor and described
The other end of second inductance is electrically connected, the cathode of the 18th capacitor and the cathode of the 9th resistance and the 19th electricity
The cathode of appearance is electrically connected to ground；
The power output end of the just extremely described 2nd DC-DC converting unit of 19th capacitor.
In one embodiment, the 3rd DC-DC converting unit includes the 3rd DC-DC conversion chip, the 20th capacitor
~the three ten five capacitor, eleventh resistor~the 15th resistance and third inductance；
The power input of the 3rd DC-DC conversion chip and the positive, described 21st of the 20th capacitor
One end of the anode of capacitor and the 11st resistance is electrically connected to form the power input of the 3rd DC-DC converting unit, institute
The enable end for stating the 3rd DC-DC conversion chip is electrically connected with the other end of the eleventh resistor, and the 3rd DC-DC converts core
The ground terminal of piece is grounded, and the 3rd DC-DC conversion chip is electrically connected from boost terminal with one end of the twelfth resistor, institute
State one end electricity of the switch control terminal of the 3rd DC-DC conversion chip and the cathode of the 22nd capacitor and the third inductance
Connection, the pressure feedback port of the 3rd DC-DC conversion chip and the anode of the 23rd capacitor and the 13rd electricity
One end of resistance is electrically connected；
The cathode of 20th capacitor and the cathode of the 21st capacitor are electrically connected to ground；
The other end of the twelfth resistor is electrically connected with the anode of the 22nd capacitor；
The cathode of 23rd capacitor is electrically connected to ground；
The anode of 24th capacitor and the positive, described tenth of the 25th capacitor~the 35th capacitor
The electrical connection of the other end of one end of four resistance and the third inductance, the cathode of the 24th capacitor and the 13rd electricity
One end of the other end of resistance, the other end of the 14th resistance and the 15th resistance is electrically connected；
The cathode of 25th capacitor~the 35th capacitor is electrically connected to ground；
The power output end of the just extremely described 3rd DC-DC converting unit of 28th capacitor；
The cathode of 15th resistance is electrically connected to ground.
In one embodiment, the current regulating module includes current regulation chip, and the main decoder module includes master
Decoding chip, the M=8, luminescence unit described in every group include 16 luminescence units.
The second aspect of the embodiment of the present invention provides one kind, and it includes above-mentioned subregion light adjusting circuit and the main decoder
Module.
The embodiment of the present invention is a kind of including the subregion of M current regulating module and power conversion module light modulation electricity by providing
Road keeps the serial synchronous control signal input of each current regulating module and the serial synchronous control signal of main decoder module defeated
Outlet electrical connection, each current regulating module are electrically connected with one group of luminescence unit, are made power conversion module access power supply, are also distinguished
It is electrically connected with each current regulating module and every group of luminescence unit, serial synchronous is exported by main decoder module and controls signal to electricity
Stream adjusts chip, controls each current regulating module and adjusts the electric current that its corresponding luminescence unit is inputted from power conversion module,
To carry out independent dimming to every group of luminescence unit, making power conversion module is respectively each current regulating module and the every group of list that shines
Member power supply, it can be achieved that subregion brightness adjustment control to all luminescence units, make include these luminescence units display device presentation it is rich
Rich dynamic brightness and contrast.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
FIG. 1 to FIG. 3 is the structural schematic diagram of subregion light adjusting circuit provided in an embodiment of the present invention；
Fig. 4 is the structural schematic diagram of the first DC-DC converting unit provided in an embodiment of the present invention；
Fig. 5 is the circuit diagram of the first DC-DC converting unit provided in an embodiment of the present invention；
Fig. 6 is the circuit diagram of the 2nd DC-DC converting unit provided in an embodiment of the present invention；
Fig. 7 is the circuit diagram of the 3rd DC-DC converting unit provided in an embodiment of the present invention.
Specific embodiment
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention are explicitly described, it is clear that described embodiment is the present invention one
The embodiment divided, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, should fall within the scope of the present invention.
Description and claims of this specification and term " includes " and their any deformations in above-mentioned attached drawing, meaning
Figure, which is to cover, non-exclusive includes.Such as process, method or system comprising a series of steps or units, product or equipment do not have
It is defined in listed step or unit, but optionally further comprising the step of not listing or unit, or optionally also wrap
Include the other step or units intrinsic for these process, methods, product or equipment.In addition, term " first ", " second " and
" third " etc. is for distinguishing different objects, not for description particular order.
The present embodiment provides a kind of subregion light adjusting circuits, can be used for the backlight to the display device with backlight
Subregion light modulation is carried out, subregion light modulation can also be carried out to self-emission display apparatus.
As shown in Figure 1, subregion light adjusting circuit 1 provided by the present embodiment, including M current regulating module (example in Fig. 1
Property shows M current regulating module, be expressed as 11,12 ..., 1M) and power conversion module 20；
The serial synchronous control signal input of each current regulating module and the serial synchronous of main decoder module 2 control and believe
The electrical connection of number output end, each current regulating module (illustratively show M group luminescence unit, divide with one group of luminescence unit in Fig. 1
Be not expressed as 31,32 ..., 3M) electrical connection；
Power conversion module 20 accesses power supply, is also electrically connected respectively with each current regulating module and every group of luminescence unit,
Power conversion module 20 is respectively each current regulating module and every group of luminescence unit power supply；
Wherein, M >=1 and be integer, main decoder module 2 export serial synchronous and control signal to current regulating module, control
Each current regulating module adjusts the electric current that its corresponding luminescence unit is inputted from power conversion module 20, single to shine to every group
Member carries out independent dimming.
In the application, current regulating module, which can be selected, arbitrarily has to the backlight of display device or display device
The circuit or device that the operating current of selfluminous cell is adjusted.Main decoder module, which can also be selected, arbitrarily has control electricity
Flow the circuit or device of the function of adjustment module.Current regulating module or main decoder module can be central processing unit
(Central Processing Unit, CPU), can also be other general processors, digital signal processor (Digital
Signal Processor, DSP), specific integrated circuit (Application Specific Integrated Circuit,
ASIC), ready-made programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic
Device, discrete gate or transistor logic, discrete hardware components, single-chip microcontroller etc..Main decoder module is also possible to display dress
The screen driving plate (TCON, Timing Controller) set.
In the application, main decoder module can be arbitrary decoding device or circuit, for example, with HDR (High-Dynamic
Range, high dynamic range images) function decoding chip, it is corresponding, subregion light adjusting circuit be high dynamic subregion light adjusting circuit.
In one embodiment, current regulating module is realized by current regulation chip, for example, IW7038 type current regulation chip.
In the application, power conversion module can be arbitrarily to have access power supply and convert the voltage and current of power supply
For the circuit or device suitable for current regulation chip and the operating current of luminescence unit.
In one embodiment, power conversion module includes at least one DC-DC (direct current, direct current) conversion
Device.Corresponding, the power supply of power conversion module access is DC power supply.
In one embodiment, power conversion module includes at least one AC (Alternating Current, exchange)-
DC converter.Corresponding, the power supply of power conversion module access is AC power source, for example, mains ac power supply.
In the application, when display device includes backlight, luminescence unit is backlight, and luminescence unit can be LED；
When display device is self-emission display apparatus, luminescence unit can be OLED or QLED.
In one embodiment, M=8, every group of luminescence unit include 16 luminescence units.Work as M=8, every group of luminescence unit
When including 16 luminescence units, subregion light adjusting circuit can realize 128 area's independent dimmings.
As shown in Fig. 2, in one embodiment, subregion light adjusting circuit 1 further includes control module 30, the string of control module 30
Row signal input part is electrically connected with the serial signal output end of main decoder module 2, the synchronous control signal input of control module 30
End is electrically connected with the synchronous control signal output end of main decoder module 2, and control module 30 is also electrically connected with power conversion module 20,
The serial synchronous control signal output of control module 30 is defeated with the serial synchronous of each current regulating module control signal respectively
Enter end electrical connection；
Main decoder module 2 passes through SPI (Serial Peripheral Interface, a Serial Peripheral Interface (SPI)) connection
Device exports serial signal (SPI signal) and synchronous control signal to control module 30, and control module is exported serial by spi bus
Synchronous control signal (including serial signal and synchronous control signal) is to each current regulating module, to control each electric current
Adjustment module adjusts the electric current that its corresponding luminescence unit is inputted from power conversion module 20, only to carry out to every group of luminescence unit
Vertical light modulation.
In the application, control module, which can be selected, arbitrarily has to the spontaneous of the backlight of display device or display device
The circuit or device that the operating current of light unit is adjusted.Control module can be central processing unit (Central
Processing Unit, CPU), it can also be other general processors, digital signal processor (Digital Signal
Processor, DSP), it is specific integrated circuit (Application Specific Integrated Circuit, ASIC), existing
At programmable gate array (Field-Programmable Gate Array, FPGA) or other programmable logic device, discrete
Door or transistor logic, discrete hardware components, single-chip microcontroller etc..
In one embodiment, control module can be realized by single-chip microcontroller or chip, for example, GD32F130C type monolithic
Machine or chip.
The signal converting between main decoder module and current control module is accepted by control module in above-described embodiment, is made
Winner's decoder module need to only have the software control function to control module, and the indirect drive to current control module can be realized
Dynamic, main decoder module is without being provided simultaneously with software and hardware control function, to the hardware controls function of current control module by controlling
Molding block is realized, so that the selection space of main decoder module is more extensive, can select arbitrarily have HDR according to actual needs
The main decoder module of function.
As shown in figure 3, in one embodiment, power conversion module 20 includes:
First DC-DC converting unit 21, the power input of the first DC-DC converting unit 21 terminate power supply, and the first DC-DC turns
The first power output end for changing unit 21 is electrically connected with the first power input of each current regulating module respectively, the first DC-
The second source output end of DC converting unit 21 is electrically connected with every group of luminescence unit respectively；
2nd DC-DC converting unit 22, the power input of the 2nd DC-DC converting unit 22 and the first DC-DC conversion are single
The power end electrical connection of member 21, the power output end of the 2nd DC-DC converting unit 22 and the first power input of control module 30
The second source input terminal of end and each current regulating module is electrically connected；And
3rd DC-DC converting unit 23, the power input of the 3rd DC-DC converting unit 23 and the 2nd DC-DC conversion are single
The power output end electrical connection of member 22, the power output end of the 3rd DC-DC converting unit 23 and the second source of control module 30
Input terminal and the electrical connection of the third power input of each current regulating module.
In the application, three DC-DC converting units can all be realized by DC-DC converter or chip.
In one embodiment, the first DC-DC converting unit and the 2nd DC-DC converting unit respectively include a ND/
EUP3484 type DC-DC conversion chip, the 3rd DC-DC converting unit include MPS1653 type DC-DC conversion chip.
By three DC-DC converting units of setting in above-described embodiment, the multistage to supply voltage and electric current may be implemented
Conversion, to provide required operating voltage and size of current for other each devices.
Fig. 3 illustratively shows the subregion light adjusting circuit realized on the basis of Fig. 2, when not including control module,
Remove control module and three DC-DC converting units then connection line between control module on the basis of Fig. 3.
As shown in figure 4, in one embodiment, the first DC-DC converting unit 21 includes:
Step-down rectifier subelement 211, the power input of step-down rectifier subelement 211 are the first DC-DC converting unit 21
Power input, the power end of step-down rectifier subelement 211 is the power end of the first DC-DC converting unit 21；
DC-DC conversion subunit 212, the power input and step-down rectifier subelement 211 of DC-DC conversion subunit 212
Power output end be electrically connected, the first power output end of DC-DC conversion subunit 212 is the first DC-DC converting unit 21
The first power output end, the second source output end of DC-DC conversion subunit 212 is the of the first DC-DC converting unit 21
Two power output ends.
In the application, step-down rectifier subelement, which can be selected, arbitrarily has the circuit of step-down rectifier function to realize, DC-DC
Conversion subunit, which can be selected, arbitrarily has circuit or the chip of DC voltage and electric current conversion function to realize.
As shown in figure 5, in one embodiment, step-down rectifier subelement 211 includes DC socket DC-JACK and first capacitor
The capacitor C4 of C1~the 4th；
The step-down rectifier subelement that is electrically connected to form of the anode of the power input and first capacitor C1 of DC socket DC-JACK
211 power input；
The anode of second capacitor C2 is electrically connected with the anode of the anode of first capacitor C1 and third capacitor C3；
The just extremely power end of step-down rectifier subelement 211 of third capacitor C3；
4th capacitor C4 just extremely the power output end of step-down rectifier subelement 211 and with third capacitor C3 anode electricity
Connection；
Power output end, the cathode of first capacitor C1, the cathode of the second capacitor C2, the third capacitor of DC socket DC-JACK
The cathode of the cathode of C3 and the 4th capacitor C4 are electrically connected to ground.
As shown in figure 5, in the above-described embodiments, DC-DC conversion subunit 212 includes the first DC-DC conversion chip U1, the
The one resistance R6 of resistance R1~the 6th, the 5th capacitor C10 of capacitor C5~the tenth and the first inductance L1；
The power input of first DC-DC conversion chip U1 and one end of first resistor R1 be electrically connected to form DC-DC conversion
The enable end of the power input of subelement 212, the first DC-DC conversion chip U1 is electrically connected with the other end of first resistor R1,
The frequency of oscillation end of first DC-DC conversion chip U1 is electrically connected with the anode of one end of second resistance R2 and the 6th capacitor C6, the
The boost terminal of one DC-DC conversion chip U1 is electrically connected with the anode of the 7th capacitor C7, and the power supply of the first DC-DC conversion chip U1 is defeated
Outlet is electrically connected with one end of the anode of the 8th capacitor C8 and the first inductance L1, and the common ground of the first DC-DC conversion chip U1 connects
The frequency of oscillation end on ground, the first DC-DC conversion chip U1 is electrically connected with the cathode of the 8th capacitor C8, the first DC-DC conversion chip
The pressure feedback port of U1 is electrically connected with one end of one end of 3rd resistor R3 and the 4th resistance R4；
The other end of second resistance R2 is electrically connected with the anode of the 5th capacitor C5；
The cathode of the cathode and the tenth capacitor C10 of the other end of 3rd resistor R3 and the 9th capacitor C9 is electrically connected to ground；
The other end of 4th resistance R4 is electrically connected with one end of one end of the 5th resistance R5 and the 6th resistance R6；
The anode and the first inductance L1 of the other end of 5th resistance R5 and the anode of the 9th capacitor C9 and the tenth capacitor C10
Other end electrical connection；
The other end of 6th resistance R6 is the second source output end of DC-DC conversion subunit 212；
Cathode, the cathode of the 6th capacitor C6 and the cathode of the 7th capacitor C7 of 5th capacitor C5 is electrically connected to ground；
Just extremely the first power output end of DC-DC conversion subunit 212 of tenth capacitor C10.
In the application, the chip for arbitrarily having DC voltage and electric current conversion function can be selected in the first DC-DC conversion chip
To realize.The input voltage of first DC-DC converting unit is 19V~24V, input current 5V.
In one embodiment, the first DC-DC conversion chip is ND/EUP3484 type DC-DC conversion chip.
As shown in fig. 6, in one embodiment, the 2nd DC-DC converting unit 22 include the 2nd DC-DC conversion chip U2,
The 11st capacitor C19 of capacitor C11~the 19th, the 7th resistance R10 of resistance R7~the tenth and the second inductance L2；
The anode of the power input of 2nd DC-DC conversion chip U2 and the 11st capacitor C11, the 12nd capacitor C12
Anode, the anode of the 13rd capacitor C13 and the 7th resistance R7 one end be electrically connected to form the power supply of the 2nd DC-DC converting unit 22
The enable end of input terminal, the 2nd DC-DC conversion chip U2 is electrically connected with the other end of the 7th resistance R7, and the 2nd DC-DC converts core
The frequency of oscillation end of piece U2 is electrically connected with the anode of one end of the 8th resistance R8 and the 15th capacitor C15, and the 2nd DC-DC converts core
The boost terminal of piece U2 is electrically connected with the anode of the 16th capacitor C16, the power output end and the tenth of the 2nd DC-DC conversion chip U2
The anode of seven capacitor C17 and one end of the second inductance L2 are electrically connected, the common ground ground connection of the 2nd DC-DC conversion chip U2, and second
The frequency of oscillation end of DC-DC conversion chip U2 is electrically connected with the cathode of the 17th capacitor C17, the 2nd DC-DC conversion chip U2's
Pressure feedback port is electrically connected with one end of one end of the 9th resistance R9 and the tenth resistance R10；
Cathode, the cathode of the 12nd capacitor C12 and the cathode of the 13rd capacitor C13 of 11st capacitor C11 is electrically connected to
Ground；
The anode of 14th capacitor C14 is electrically connected with the other end of the 8th resistance R8, the cathode of the 14th capacitor C14 and the
The cathode of 15 capacitor C15 and the cathode of the 16th capacitor C16 are electrically connected to ground；
The anode of 18th capacitor C18 and the anode of the 19th capacitor C19, the other end of the tenth resistance R10 and the second electricity
Feel the other end electrical connection of L2, the cathode of the cathode of the 18th capacitor C18 and the cathode of the 9th resistance R9 and the 19th capacitor C19
It is electrically connected to ground；
The just extremely power output end of the 2nd DC-DC converting unit 22 of 19th capacitor C19.
In the application, the chip for arbitrarily having DC voltage and electric current conversion function can be selected in the 2nd DC-DC conversion chip
To realize.The input current of 2nd DC-DC converting unit is 3A, output voltage 12V.
In one embodiment, the 2nd DC-DC conversion chip is ND/EUP3484 type DC-DC conversion chip.
As shown in fig. 7, the 3rd DC-DC converting unit 23 include the 3rd DC-DC conversion chip U3, the 20th capacitor C20~
35th capacitor C35, the resistance R15 of eleventh resistor R11~the 15th and third inductance L3；
The power input of 3rd DC-DC conversion chip U3 and anode, the 21st capacitor C21 of the 20th capacitor C20
Anode and one end of the 11st resistance R11 be electrically connected to form the power input of the 3rd DC-DC converting unit 23, the 3rd DC-DC
The enable end of conversion chip U3 is electrically connected with the other end of eleventh resistor R11, the ground connection termination of the 3rd DC-DC conversion chip U3
Ground, the 3rd DC-DC conversion chip U3's is electrically connected from boost terminal with one end of twelfth resistor R12, the 3rd DC-DC conversion chip
The switch control terminal of U3 is electrically connected with one end of the cathode of the 22nd capacitor C22 and third inductance L3, and the 3rd DC-DC converts core
The pressure feedback port of piece U3 is electrically connected with one end of the anode of the 23rd capacitor C23 and thirteenth resistor R13；
The cathode of 20th capacitor C20 and the cathode of the 21st capacitor C21 are electrically connected to ground；
The other end of twelfth resistor R12 is electrically connected with the anode of the 22nd capacitor C22；
The cathode of 23rd capacitor C23 is electrically connected to ground；
The anode of positive and the 25th capacitor C35 of capacitor C25~the 35th of 24th capacitor C24, the 14th
One end of resistance R14 and the other end electrical connection of third inductance L3, the cathode and thirteenth resistor R13 of the 24th capacitor C24
The other end, the 14th resistance R14 the other end and the 15th resistance R15 one end electrical connection；
The cathode of the 25th capacitor C35 of capacitor C25~the 35th is electrically connected to ground；
The just extremely power output end of the 3rd DC-DC converting unit 23 of 28th capacitor C28；
The cathode of 15th resistance R15 is electrically connected to ground.
In the application, the chip for arbitrarily having DC voltage and electric current conversion function can be selected in the 3rd DC-DC conversion chip
To realize.The input voltage of 3rd DC-DC converting unit is 12V, output voltage 3.3V.
In one embodiment, the 3rd DC-DC conversion chip is MPS1653 type DC-DC conversion chip.
Above-described embodiment may be implemented by providing the power module including three DC-DC conversion chips to supply voltage
With the conversion step by step of electric current, to provide required operating voltage and electric current for each current conversion module and luminescence unit.
One embodiment of the present of invention provides a kind of display device comprising above-mentioned subregion light adjusting circuit and main decoder mould
Block.
In one embodiment, display device can be any type of display device, such as based on LCD (Liquid
Crystal Display, liquid crystal display device) technology liquid crystal display device, be based on OLED (Organic Light-
Emitting Diode, Organic Light Emitting Diode, alternatively, Organic Electroluminesence Display, Organic Electricity
Laser display) technology Organic Electricity laser display apparatus, based on QLED (Quantum Dot Light Emitting Diodes,
Light emitting diode with quantum dots) technology light emitting diode with quantum dots display device or curved-surface display device etc..
The embodiment of the present invention is a kind of including the subregion of M current regulating module and power conversion module light modulation electricity by providing
Road keeps the serial synchronous control signal input of each current regulating module and the serial synchronous control signal of main decoder module defeated
Outlet electrical connection, each current regulating module are electrically connected with one group of luminescence unit, are made power conversion module access power supply, are also distinguished
It is electrically connected with each current regulating module and every group of luminescence unit, serial synchronous is exported by main decoder module and controls signal to electricity
Stream adjusts chip, controls each current regulating module and adjusts the electric current that its corresponding luminescence unit is inputted from power conversion module,
To carry out independent dimming to every group of luminescence unit, making power conversion module is respectively each current regulating module and the every group of list that shines
Member power supply, it can be achieved that subregion brightness adjustment control to all luminescence units, make include these luminescence units display device presentation it is rich
Rich dynamic brightness and contrast.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although referring to aforementioned reality
Applying example, invention is explained in detail, those skilled in the art should understand that: it still can be to aforementioned each
Technical solution documented by embodiment is modified or equivalent replacement of some of the technical features；And these are modified
Or replacement, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution should wrap
Containing within protection scope of the present invention.
Claims (10)
1. a kind of subregion light adjusting circuit characterized by comprising
M current regulating module, the serial synchronous control signal input and main decoder module of each current regulating module
The electrical connection of serial synchronous control signal output, each current regulating module is electrically connected with one group of luminescence unit；And
Power conversion module accesses power supply, is also electrically connected respectively with luminescence unit described in each current regulating module and every group
It connects, the power conversion module is respectively the power supply of luminescence unit described in each current regulating module and every group；
Wherein, M >=1 and be integer, main decoder module output serial synchronous controls signal to the current regulation mould
Block controls each current regulating module and adjusts the electric current that its corresponding luminescence unit is inputted from the power conversion module,
Independent dimming is carried out with the luminescence unit described in every group.
2. subregion light adjusting circuit as described in claim 1, which is characterized in that it further include control module, the control module
Serial signal input terminal is electrically connected with the serial signal output end of the main decoder module, the synchronously control letter of the control module
Number input terminal is electrically connected with the synchronous control signal output end of the main decoder module, and the control module also turns with the power supply
Change the mold block electrical connection, the serial synchronous control signal output of the control module respectively with each current regulating module
The electrical connection of serial synchronous control signal input.
3. subregion light adjusting circuit as claimed in claim 2, which is characterized in that the power conversion module includes:
First DC-DC converting unit, the power input of the first DC-DC converting unit terminate power supply, and the first DC-DC turns
The first power output end for changing unit is electrically connected with the first power input of each current regulating module respectively, and described
The second source output end of one DC-DC converting unit is electrically connected with luminescence unit described in every group respectively；
2nd DC-DC converting unit, the power input of the 2nd DC-DC converting unit and the first DC-DC conversion are single
The power end electrical connection of member, the power output end of the 2nd DC-DC converting unit and the first power supply of the control module are defeated
The second source input terminal for entering end and each current regulating module is electrically connected；And
3rd DC-DC converting unit, the power input of the 3rd DC-DC converting unit and the 2nd DC-DC conversion are single
The power output end electrical connection of member, the power output end of the 3rd DC-DC converting unit and the second electricity of the control module
Source input terminal and the electrical connection of the third power input of each current regulating module.
4. subregion light adjusting circuit as claimed in claim 3, which is characterized in that the first DC-DC converting unit includes:
Step-down rectifier subelement, the power input of the step-down rectifier subelement are the electricity of the first DC-DC converting unit
Source input terminal, the power end of the step-down rectifier subelement are the power end of the first DC-DC converting unit；
DC-DC conversion subunit, the power supply of the power input of the DC-DC conversion subunit and the step-down rectifier subelement
Output end be electrically connected, the first power output end of the DC-DC conversion subunit is the of the first DC-DC converting unit
One power output end, the second source output end of the DC-DC conversion subunit are the second of the first DC-DC converting unit
Power output end.
5. subregion light adjusting circuit as claimed in claim 4, which is characterized in that the step-down rectifier subelement include DC socket and
First capacitor~the 4th capacitor；
The step-down rectifier subelement that is electrically connected to form of the power input of the DC socket and the anode of the first capacitor
Power input；
The anode of second capacitor is electrically connected with the anode of the anode of the first capacitor and the third capacitor；
The power end of the just extremely described step-down rectifier subelement of the third capacitor；
The power output end of the just extremely described step-down rectifier subelement of 4th capacitor and anode with the third capacitor
Electrical connection；
The power output end of the DC socket, the cathode of the first capacitor, the cathode of second capacitor, the third capacitor
Cathode and the cathode of the 4th capacitor be electrically connected to ground.
6. subregion light adjusting circuit as claimed in claim 4, which is characterized in that the DC-DC conversion subunit includes the first DC-
DC conversion chip, first resistor~the 6th resistance, the 5th capacitor~the tenth capacitor and the first inductance；
The power input of the first DC-DC conversion chip and one end of the first resistor are electrically connected to form the DC-DC
The power input of conversion subunit, the enable end of the first DC-DC conversion chip and the other end electricity of the first resistor
Connection, the frequency of oscillation end of the first DC-DC conversion chip and one end of the second resistance and the 6th capacitor are just
Pole electrical connection, the boost terminal of the first DC-DC conversion chip are electrically connected with the anode of the 7th capacitor, the first DC-
The power output end of DC conversion chip is electrically connected with one end of the anode of the 8th capacitor and first inductance, and described first
The common ground of DC-DC conversion chip is grounded, the frequency of oscillation end of the first DC-DC conversion chip and bearing for the 8th capacitor
Pole electrical connection, the pressure feedback port of the first DC-DC conversion chip and one end of the 3rd resistor and the 4th resistance
One end electrical connection；
The other end of the second resistance is electrically connected with the anode of the 5th capacitor；
The cathode of the cathode and the tenth capacitor of the other end of the 3rd resistor and the 9th capacitor is electrically connected to ground；
The other end of 4th resistance is electrically connected with one end of one end of the 5th resistance and the 6th resistance；
The anode and first electricity of the anode and the tenth capacitor of the other end and the 9th capacitor of 5th resistance
The other end of sense is electrically connected；
The other end of 6th resistance is the second source output end of the DC-DC conversion subunit；
Cathode, the cathode of the 6th capacitor and the cathode of the 7th capacitor of 5th capacitor are electrically connected to ground；
First power output end of the just extremely described DC-DC conversion subunit of the tenth capacitor.
7. subregion light adjusting circuit as claimed in claim 3, which is characterized in that the 2nd DC-DC converting unit includes second
DC-DC conversion chip, the 11st capacitor~the 19th capacitor, the 7th resistance~the tenth resistance and the second inductance；
Positive, described 12nd capacitor of the power input and the 11st capacitor of the 2nd DC-DC conversion chip
One end of positive and described 7th resistance of positive, described 13rd capacitor is electrically connected to form the 2nd DC-DC converting unit
Power input, the enable end of the 2nd DC-DC conversion chip is electrically connected with the other end of the 7th resistance, described
The frequency of oscillation end of two DC-DC conversion chips is electrically connected with the anode of one end of the 8th resistance and the 15th capacitor,
The boost terminal of the 2nd DC-DC conversion chip is electrically connected with the anode of the 16th capacitor, and the 2nd DC-DC converts core
The power output end of piece is electrically connected with one end of the anode of the 17th capacitor and second inductance, the 2nd DC-DC
The common ground of conversion chip is grounded, the frequency of oscillation end of the 2nd DC-DC conversion chip and the cathode of the 17th capacitor
Electrical connection, the pressure feedback port of the 2nd DC-DC conversion chip and one end of the 9th resistance and the tenth resistance
One end electrical connection；
Cathode, the cathode of the 12nd capacitor and the cathode of the 13rd capacitor of 11st capacitor are electrically connected to
Ground；
The anode of 14th capacitor is electrically connected with the other end of the 8th resistance, the cathode of the 14th capacitor and institute
The cathode of the cathode and the 16th capacitor of stating the 15th capacitor is electrically connected to ground；
The other end and described second of the anode and positive, described tenth resistance of the 19th capacitor of 18th capacitor
The other end of inductance is electrically connected, the cathode of the 18th capacitor and the cathode of the 9th resistance and the 19th capacitor
Cathode is electrically connected to ground；
The power output end of the just extremely described 2nd DC-DC converting unit of 19th capacitor.
8. subregion light adjusting circuit as claimed in claim 3, which is characterized in that the 3rd DC-DC converting unit includes third
DC-DC conversion chip, the 20th capacitor~the 35th capacitor, eleventh resistor~the 15th resistance and third inductance；
The power input of the 3rd DC-DC conversion chip and positive, described 21st capacitor of the 20th capacitor
Anode and one end of the 11st resistance be electrically connected to form the power input of the 3rd DC-DC converting unit, described the
The enable end of three DC-DC conversion chips is electrically connected with the other end of the eleventh resistor, the 3rd DC-DC conversion chip
Ground terminal ground connection, the 3rd DC-DC conversion chip is electrically connected from boost terminal with one end of the twelfth resistor, and described the
The switch control terminal of three DC-DC conversion chips is electrically connected with the cathode of the 22nd capacitor and one end of the third inductance
It connects, the pressure feedback port of the 3rd DC-DC conversion chip and the positive and described thirteenth resistor of the 23rd capacitor
One end electrical connection；
The cathode of 20th capacitor and the cathode of the 21st capacitor are electrically connected to ground；
The other end of the twelfth resistor is electrically connected with the anode of the 22nd capacitor；
The cathode of 23rd capacitor is electrically connected to ground；
Positive, described 14th electricity of the anode of 24th capacitor and the 25th capacitor~the 35th capacitor
The electrical connection of the other end of one end of resistance and the third inductance, cathode and the thirteenth resistor of the 24th capacitor
One end of the other end, the other end of the 14th resistance and the 15th resistance is electrically connected；
The cathode of 25th capacitor~the 35th capacitor is electrically connected to ground；
The power output end of the just extremely described 3rd DC-DC converting unit of 28th capacitor；
The cathode of 15th resistance is electrically connected to ground.
9. subregion light adjusting circuit as described in any one of claims 1 to 8, which is characterized in that the current regulating module includes
Current regulation chip, the main decoder module include main decoder chip, and the M=8, luminescence unit described in every group includes 16 hairs
Light unit.
10. a kind of display device, which is characterized in that including subregion light adjusting circuit according to any one of claims 1 to 9 and described
Main decoder module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811109636.4A CN109192145A (en) | 2018-09-21 | 2018-09-21 | A kind of subregion light adjusting circuit and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811109636.4A CN109192145A (en) | 2018-09-21 | 2018-09-21 | A kind of subregion light adjusting circuit and display device |
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| CN109192145A true CN109192145A (en) | 2019-01-11 |
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| CN201811109636.4A Pending CN109192145A (en) | 2018-09-21 | 2018-09-21 | A kind of subregion light adjusting circuit and display device |
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