CN109448625A - The display driver circuit and driving method of active light emitting sub-pixel brightness control - Google Patents
The display driver circuit and driving method of active light emitting sub-pixel brightness control Download PDFInfo
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- CN109448625A CN109448625A CN201811582994.7A CN201811582994A CN109448625A CN 109448625 A CN109448625 A CN 109448625A CN 201811582994 A CN201811582994 A CN 201811582994A CN 109448625 A CN109448625 A CN 109448625A
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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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3266—Details of drivers for scan electrodes
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- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses the display driver circuits and driving method of a kind of active light emitting sub-pixel brightness control, which includes source switch unit, discharge tube N3, door switch unit, storage capacitor CS, driving tube N4 and PWM pipe P3.The display driving method and circuit of active light emitting sub-pixel brightness control disclosed by the invention control the electric current for the driving tube for flowing through sub-pixel according to the voltage for the storage capacitor for being loaded onto sub-pixel, and using the OLED of the PWM of sub-pixel control system pixel in one frame/field fluorescent lifetime, thus come control sub-pixel OLED average luminescence brightness, realize the brightness that display is adjusted in ambient brightness variation, while method the phenomenon that reducing vision ghost motion blur of brightness control.
Description
Technical field
The invention belongs to field of display technology, the display more particularly, to a kind of active light emitting sub-pixel brightness control is driven
Circuit and driving method.
Background technique
Display technology experienced from CRT to LCD, then to LED and burning hot OLED, the QLED of current development so that it is secondary when
Mini-LED, Nano-LED and Micro-OLED of generation display.People are also cured display color saturation, the high demand of contrast
Add vigorous.The display effect for pursuing high dynamic range, high color reproduction degree and wide viewing angle is one of target of display field.Mesh
Preceding existing some sub-pixel driving circuits can be because of the drift of the grid source threshold voltage of CMOS tube when realizing low-light level display
Cause the brightness of sub-pixel to have biggish difference, is especially turned down in display low ash rank image/video or in low-light level environment
The details of brightness disproportionation one when screen intensity, display are unintelligible.Along with the development of VR/AR, the single size for showing sub-pixel
Also smaller and smaller, the requirement for pursuing high-quality display effect is a kind of test for the design of sub- pixel-driving circuit.For mesh
For preceding most of active light emitting displays, sub-pixel shines completely in one frame/field time, until next frame/field
The phenomenon that data are rescaned to the sub-pixel, this will be more prone to produce motion blur and vision ghost.
Summary of the invention
In order to solve the problems of prior art, the invention is intended to provide one kind to reduce vision ghost and movement
The display driver circuit of the active light emitting sub-pixel brightness control of blooming.
To achieve the purpose of the present invention, the display driver circuit packet that provided active light emitting sub-pixel brightness controls herein
Include source switch unit, discharge tube N3, door switch unit, storage capacitor CS, driving tube N4 and PWM pipe P3.
Further, which further includes the offset N5 shunted for the electric current to driving sub-pixel.Benefit
Shunting is realized with offset N5, more easily to adjust and realize the low current of sub-pixel, is finely controlled sub-pixel
Light emission luminance.
Further, the source switch unit and/or the door switch unit are transmission gate.
Present invention purpose in this, which also resides in, provides a kind of utilization driving circuit provided by the present invention driving pixel array
The luminous driving method of sub-pixel, the display driving method are loaded on pixel array sub-pixel using storage capacitor CS
The turn-on time co- controlling sub-pixel for emitting light of voltage and PWM pipe P3.
Further, the storage capacitor CS loads on the image corresponding with sub-pixel of the voltage on sub-pixel or video counts
It is linear according to grayscale value.
Further, all sub-pixels in the pixel array in pixel array with a line are by same pulse signal
Control luminous initial time and the lighting time of all sub-pixels of the row.
Further, all sub-pixels in the pixel array are within the time of one frame/field, and fluorescent lifetime is by described
PWM pipe P3 control is part-time of the entire frame/field time perhaps in one frame/field or is zero.
Further, the fluorescent lifetime within the time of one frame/field of all sub-pixels in the pixel array is equal.
Further, the sub-pixel lighting mode of the pixel array is using all PWM pipe P3 for gradually controlling every a line
And light all sub-pixels of every a line of entire pixel array respectively, or control simultaneously pixel array all rows it is all
PWM pipe P3 and all sub-pixels for lighting entire pixel array together.
Further, in the time of one frame/field, when gradually lighting sub-pixel according to scanning sequency, adjacent row scanning twice
The initial time of lighting of sub-pixel be separated by row T synchronizing cycle in one frame/fieldHSYNC。
The beneficial effects of the present invention are: the display driver circuit of active light emitting sub-pixel brightness disclosed by the invention control and
Driving method controls the electric current for the driving tube for flowing through sub-pixel according to the voltage for the storage capacitor for being loaded onto sub-pixel, and utilizes
Thus the OLED of the PWM control system pixel of sub-pixel is averaged in one frame/field fluorescent lifetime to control the OLED of sub-pixel
Light emission luminance realizes and adjusts the brightness of display in ambient brightness variation, while reducing vision ghost motion blur
The phenomenon that.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of active light emitting sub-pixel driving circuit provided by the present invention；
Fig. 2 is that pixel array turntable driving provided by the present invention and PWM are controlled；
Fig. 3 is the timing diagram of turntable driving provided by the present invention and PWM control；
Fig. 4 is the timing diagram of the sub-pixel of every a line that one kind provided by the present invention gradually lights pixel array；
Fig. 5 is a kind of timing diagram of the sub-pixel of all rows for lighting pixel array simultaneously provided by the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
Member's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.?
In the case where not conflicting, the feature in embodiment and embodiment in the present invention can mutual any combination.
As shown in Figure 1, the display driver circuit of active light emitting sub-pixel brightness control provided by the invention includes source switch
Unit, discharge tube N3, door switch unit, storage capacitor CS, driving tube N4, and the PWM controlled by pulse signal (pwm signal)
Pipe P3, wherein source switch unit is to control the voltage for being loaded onto the storage capacitor CS of sub-pixel when DA conversion；Discharge tube N3 is used
Charge on the storage capacitor CS for removing sub-pixel；Door switch unit chooses all sons of the scan line for being expert at when scanning
Pixel carries out DA conversion to image corresponding to the row sub-pixel or video data so as to subsequent；Storage capacitor CS is for storing
The on-load voltage that image corresponding to sub-pixel or video data are converted to through DA, the driving for flowing through the sub-pixel is controlled with this
The electric current of pipe N4；The OLED that driving tube N4 is used to provide driving sub-pixel according to the voltage at the both ends storage capacitor CS luminous electricity
Stream；PWM pipe P3 for controlling the duty ratio of time that OLED is shown, controlled in a manner of impulse modulation the OLED of sub-pixel a frame/
Thus lighting time in field time controls the average luminescence brightness of the OLED of sub-pixel；The OLED is Organic Light Emitting Diode.
In attached drawing, VAN is the anode voltage for driving OLED luminous, and VCOM is the cathode voltage for driving OLED luminous, and VDAC is DAC output
Periodic ramp voltage, PWM-i is the pulse control signal for loading on the PWM pipe P3 of the i-th row sub-pixel driving circuit.
Source switch unit in the driving circuit, discharge tube N3, door switch unit, storage capacitor CS, driving tube N4, and
The connection relationship of PWM pipe P3 is as shown in Figure 1, periodic ramp voltage VDAC loads on the power end of source switch unit, source switch
The signal output end of unit connects the power end of discharge tube N3 and door switch unit, the control terminal of source switch unit, discharge tube respectively
The control terminal of N3 and the control terminal of door switch unit are respectively as connecting pin, for loading external control signal；Door switch list
The signal output end of member connects the first pole plate of storage capacitor CS and the control terminal of driving tube N4, the second pole of storage capacitor CS respectively
Plate ground connection, the power supply termination driving OLED of driving tube N4 luminous anode voltage VAN, the power end of output termination PWM pipe P3；
The control terminal of PWM pipe P3 is loaded as connecting pin for the i-th row sub-pixel driving pulse control signal PWM-i, PWM pipe P3's
Output termination sub-pixel OLED.
In Fig. 1, all sub-pixels of the position in same column are shared by source switch unit and discharge tube N3 in pixel array
The unit 1 of composition, i.e., all sub-pixels in pixel array on each column correspond to identical unit 1, and every in pixel array
The unit 2 being made of door switch unit, storage capacitor CS, driving tube N4 and PWM pipe P3 is separately configured in one sub-pixel, i.e.,
Each sub-pixel is controlled by independent unit 2.
The driving circuit equal with sub-pixel quantity is set according to the quantity for the pixel array sub-pixel to be driven, is made
Each sub-pixel is driven by an independent driving circuit provided by the present invention, be ensure that and is accurately controlled, and is easier to
Realize the driving of sub-pixel.
In order to more easily adjust and realize sub-pixel OLED low current, be finely controlled the OLED's of sub-pixel
Light emission luminance, driving circuit provided by the present invention further include the offset N5 for shunting, the power supply termination of offset N5
The output end of driving tube N4, output end ground connection, control terminal be used as connecting pin, for external control signal load, control its be connected,
Cut-off is realized and is shunted.
Source switch unit, door switch unit documented by the present invention can be using existing any controllable switch devices
Or controllable switch circuit, such as silicon-controlled, transistor or field effect transistor controllable switch device, in this source switch unit
Using a transmission gate is made of a NMOS tube N1 and a PMOS tube P1, door switch unit is used by a NMOS tube N2 and a PMOS tube
P2 constitutes a transmission gate.
Discharge tube N3 documented by the present invention, driving tube N4, PWM pipe P3, offset N5 both can be transistor,
It can be field-effect tube.
Pixel array sub-pixel is driven using driving circuit provided by the present invention, is specifically added using storage capacitor CS
The turn-on time co- controlling sub-pixel for emitting light of the voltage and PWM pipe P3 that are loaded on pixel array sub-pixel；Wherein, energy storage electricity
Appearance CS loads on the image corresponding with sub-pixel of the voltage on sub-pixel or video data grayscale value is linear.
All sub-pixels in pixel array in pixel array with a line, which control the row by same pulse signal, to be owned
The luminous initial time of sub-pixel and lighting time；All sub-pixels in pixel array are within the time of one frame/field, when shining
Between controlled by the PWM pipe P3, be part-time of the entire frame/field time perhaps in one frame/field or be zero.
During driving, all sub-pixels in pixel array fluorescent lifetime within the time of one frame/field is equal.This hair
Driving method provided by bright can be the sub-pixel lighting mode of pixel array using all PWM pipe for gradually controlling every a line
P3 and light respectively entire pixel array every a line all sub-pixels, or control the institute of all rows of pixel array simultaneously
There is PWM pipe P3 and lights all sub-pixels of entire pixel array together；In the time of one frame/field, gradually according to scanning sequency
When lighting sub-pixel, the initial time of lighting of the sub-pixel of the adjacent scanning of row twice is separated by a row in one frame/field and synchronizes week
Phase THSYNC。
As shown in Fig. 2, explanation utilizes this hair to the present invention so that active light emitting display pixels array shares M row pixel as an example herein
The driving method of the driving sub-pixel for emitting light of driving circuit provided by bright.Active light emitting display pixels array shares M row pixel, often
Capable number is 1,2 ..., M.Showing that the number that the complete picture of a width needs to scan is M times, the number number i of scanning is 1,
2 ..., M.There is S row T synchronizing cycle in one frame image/videoHSYNC, time that each sub-pixel is lighted is w row synchronization time
w*THSYNC, 0≤w≤S, THSYNCFor a row synchronizing cycle.The display time of active light emitting display pixels array is 1000*
THSYNC.Herein with gradually light every a line of pixel array sub-pixel and simultaneously light pixel array all rows sub- picture
For element, the present invention will be described in detail.To the mode that the sub-pixel of pixel array is scanned be divided into progressive scan and every
Row scanning, for convenience of detailed description of the invention, is illustrated, but be actually not limited to the scanning by taking progressive scan mode as an example
Mode.
When being progressively scanned, the row of i-th scanning is exactly the i-th row of pixel array.To active light emitting display pixels
Array in a progressive way can be using any in following two mode:
(1) all sub-pixels of every a line of pixel array are gradually lighted
In the way of row scanning, in all sub-pixels scanning to the i-th row, the door for connecting all sub-pixels of the i-th row is opened
Unit is closed, the corresponding discharge tube N3 of all column of pixel array is also turned on, with this storage capacitor to all sub-pixels of the i-th row
CS discharges simultaneously, to be discharged to finish, and closes the corresponding discharge tube N3 of all column of pixel array, connects all column of pixel array
Corresponding source switch unit is carried out while being charged to the storage capacitor CS of all sub-pixels of the i-th row, to corresponding to the i-th row
The storage capacitor of each sub-pixel is charged to voltage corresponding to the image or video data of each sub-pixel corresponding to the i-th row
When, the corresponding source switch unit of the sub-pixel column is closed, the charging of the sub-pixel is completed.All sub-pixels to the i-th row
After completing charging, the door switch unit of all sub-pixels of the i-th row is closed.In the image or video data of the i-th+2 row sub-pixel
When corresponding line synchronising signal HSYNC starts, the corresponding pulse control signal PWM-i of the i-th row sub-pixel is set to low level, point
All sub-pixels of bright i-th row.Later, all sub-pixels of i+1 row are scanned, in all sub- pictures to i+1 row
When element scanning, the door switch unit of all sub-pixels of i+1 row is connected, is also turned on the corresponding electric discharge of all column of pixel array
Pipe N3 discharges simultaneously to the storage capacitor CS of all sub-pixels of i+1 row with this, to be discharged to finish, and closes pixel battle array
The corresponding discharge tube N3 of all column is arranged, the corresponding source switch unit of all column of pixel array is connected, to all sub- pictures of i+1 row
The storage capacitor CS of element is carried out while being charged, and the storage capacitor CS of each sub-pixel to i+1 row is charged to each of i+1 row
When voltage corresponding to the image or video data of sub-pixel, the corresponding source switch unit of the sub-pixel is closed, the sub- picture is completed
The charging of element.After all sub-pixels of i+1 row complete charging, the door switch unit of all sub-pixels of i+1 row is closed.
When the corresponding line synchronising signal HSYNC of image or video data of the i-th+3 row sub-pixel starts, by i+1 row sub-pixel pair
The pulse control signal PWM-i+1 answered is set to low level, lights all sub-pixels of i+1 row.According to the above method, to i-th+
2~M row progressively scan and successively light；Wherein 1≤i≤M, M indicate specific row in active light emitting display pixels array
Number is integer, such as 1920.
When the corresponding line synchronising signal HSYNC of image or video data of the 1003rd row sub-pixel starts, the institute of the 1st row
There is sub-pixel to have shown that the time 1000*T of 1000 row synchronizing cyclesHSYNC, need at this time all sub-pixels of the 1st row are corresponding
Pulse control signal PWM-1 be set to high level, all sub-pixels for turning off the 1st row are shown.It is same in the corresponding row of the 1004th row
Signal HSYNC is when starting for step, and all sub-pixels of the 2nd row have shown that the time 1000*T of 1000 row synchronizing cyclesHSYNC, this
When the corresponding pulse control signal PWM-2 of the 2nd row need to be set to high level, all sub-pixels for turning off the 2nd row are shown.According to upper
Method is stated, the display of the sub-pixel of every a line is gradually controlled.
The timing diagram of turntable driving and PWM control when Fig. 3 is a kind of gradually scanning.VDAC is the periodicity of DAC output
Ramp voltage, ROW-i are the control signal of N2 pipe in the door switch unit of all sub-pixels of the i-th row, and PWM-i is to load on i-th
The pulse control signal of the PWM pipe P3 of row sub-pixel driving circuit.To institute corresponding to the i-th row between the high period of ROW-i
There is sub-pixel to carry out first electric discharge to recharge, and when the HSYNC corresponding to the image or video data of the i-th+3 row sub-pixel starts
It carves, pulse control signal PWM-i corresponding to the i-th row is set to low level, connects the corresponding PWM of all sub-pixels of the i-th row
Pipe, lights all sub-pixels of the i-th row.Later, i+1 row picture is carried out in the way of the scanning of above-mentioned i-th row sub-pixel
The scanning of element is simultaneously lighted, and is so similarly operated to subsequent row to be scanned, completes the complete image of a width and show；Fig. 4
The timing of the sub-pixel of every a line of pixel array is gradually lighted for one kind, PIXEL-i indicates the corresponding all sub- pictures of the i-th row
Element, state ON indicate to shine, and state OFF expression does not shine.
(2) sub-pixel of all rows of pixel array is lighted simultaneously
In the way of row scanning, in all sub-pixels scanning to the i-th row, the door for connecting all sub-pixels of the i-th row is opened
Unit is closed, the corresponding discharge tube N3 of all column of pixel array is also turned on, with this storage capacitor to all sub-pixels of the i-th row
CS discharges simultaneously, to be discharged to finish, and closes the corresponding discharge tube N3 of all column of pixel array, connects all column of pixel array
Corresponding source switch unit is carried out while being charged to the storage capacitor CS of all sub-pixels of the i-th row, each son to the i-th row
When the storage capacitor CS of pixel is charged to voltage corresponding to the image or video data of each sub-pixel of the i-th row, the son is closed
The corresponding source switch unit of pixel column, completes the charging of the sub-pixel.After all sub-pixels of the i-th row complete charging,
Close the door switch unit of all sub-pixels of the i-th row.Later, all sub-pixels of i+1 row are scanned, to i-th+
When all sub-pixels scanning of 1 row, the door switch unit of all sub-pixels of i+1 row is connected, pixel array institute is also turned on
There is the corresponding discharge tube N3 of column, is discharged simultaneously with this storage capacitor CS of all sub-pixels of i+1 row, it is to be discharged complete
Finish, close the pixel array corresponding discharge tube N3 of all column, connects the corresponding source switch unit of all column of pixel array, to i-th+
The storage capacitor CS of all sub-pixels of 1 row is carried out while being charged, and the storage capacitor CS of each sub-pixel to i+1 row is charged to
When voltage corresponding to the image or video data of each sub-pixel of i+1 row, the corresponding source of sub-pixel column is closed
Switch unit completes the charging of the sub-pixel.According to the above method, to the sub-pixel of i-th+2~M row carry out progressive scan and according to
It is secondary to light；Wherein 1≤i≤M, M indicate specific line number in active light emitting display pixels array, are integer, such as 1920.
Since the frame synchronizing signal VSYNC of each frame, while by the pulse control of the sub-pixel of all rows of pixel array
Signal is set to low level, connects the PWM pipe of the sub-pixel of all rows of pixel array, and pixel array starts to shine.To fluorescent lifetime
Reach 1000 line synchronising signal time 1000*THSYNCWhen, while the pulse control of the sub-pixel of all rows of pixel array being believed
It number is set to high level, closes the PWM pipe of the sub-pixel of all rows of pixel array, all sub-pixels of pixel array stop shining；
Fig. 5 be and meanwhile light pixel array every a line sub-pixel timing.
Here, when using while lighting all sub-pixels of pixel array, all sub-pixels of all rows in pixel array
PWM pipe controlled by an identical pwm signal, and any one moment in one frame/field time is also turned on, while lighting picture
All sub-pixels of pixel array simultaneously show w*THSYNCTime after simultaneously close off, until next frame/field in synchronization again
It is lighted simultaneously.
Driving circuit and driving method provided by the present invention are suitable for AMOLED, QLED, Mini-LED, Nano-LED,
And the actives luminescent device such as Micro-OLED.
Claims (10)
1. the display driver circuit of active light emitting sub-pixel brightness control, it is characterised in that: the driving circuit includes source switch list
Member, discharge tube N3, door switch unit, storage capacitor CS, driving tube N4 and PWM pipe P3.
2. the display driver circuit of active light emitting sub-pixel brightness control according to claim 1, it is characterised in that: also wrap
Include the offset N5 shunted for the electric current to driving sub-pixel.
3. the display driver circuit of active light emitting sub-pixel brightness control according to claim 1 or 2, it is characterised in that:
The source switch unit and/or the door switch unit are transmission gate.
4. driving son using the display driver circuit of the control of active light emitting sub-pixel brightness described in claim 1-3 any one
The driving method of pixel intensity control, it is characterised in that: the display driving method loads on pixel array using storage capacitor CS
The turn-on time co- controlling sub-pixel for emitting light of voltage and PWM pipe P3 on sub-pixel.
5. driving method according to claim 4, it is characterised in that: the storage capacitor CS loads on the electricity on sub-pixel
Press image corresponding with sub-pixel or video data grayscale value linear.
6. driving method according to claim 5, it is characterised in that: same in pixel array in the pixel array
Capable all sub-pixels are controlled luminous initial time and the lighting time of all sub-pixels of the row by same pulse signal.
7. driving method according to claim 6, it is characterised in that: all sub-pixels in the pixel array are one
In the time of frame/field, fluorescent lifetime is controlled by the PWM pipe P3, is the portion in the entire frame/field time or one frame/field
It between timesharing, or is zero.
8. driving method according to claim 7, it is characterised in that: all sub-pixels in the pixel array are one
Fluorescent lifetime is equal in the time of frame/field.
9. driving method according to claim 7, it is characterised in that: the sub-pixel lighting mode of the pixel array uses
It gradually controls all PWM pipe P3 of every a line and lights all sub-pixels of every a line of entire pixel array, Huo Zhetong respectively
When control pixel array all rows all PWM pipe P3 and light all sub-pixels of entire pixel array together.
10. driving method according to claim 9, it is characterised in that: in the time of one frame/field, according to scanning sequency by
Secondary when lighting sub-pixel, to be separated by a row in one frame/field synchronous for the initial time of lighting of the sub-pixel of the adjacent scanning of row twice
Cycle THSYNC。
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