CN107993609A - Method, system and the drive circuit that analog- and digital- combination drive display unit is shown - Google Patents
Method, system and the drive circuit that analog- and digital- combination drive display unit is shown Download PDFInfo
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- CN107993609A CN107993609A CN201711110274.6A CN201711110274A CN107993609A CN 107993609 A CN107993609 A CN 107993609A CN 201711110274 A CN201711110274 A CN 201711110274A CN 107993609 A CN107993609 A CN 107993609A
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- display unit
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- shine
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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]
-
- 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
- G09G3/2077—Display of intermediate tones by a combination of two or more gradation control methods
- G09G3/2081—Display of intermediate tones by a combination of two or more gradation control methods with combination of amplitude modulation and time modulation
-
- 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
Abstract
The present invention discloses a kind of method that analog- and digital- combination drive display unit is shown, this method includes：The luminosity of analog-driven amount control display unit；Under the luminosity, digital drive amount controls the fluorescent lifetime of the display unit.It is by the combination of luminosity and fluorescent lifetime to display unit light emitting control, realize more rich grayscale and color, grayscale, the color range expressive ability of image are significantly improved, realizes that high contrast, high dynamic range are shown, while reduces system power dissipation and driving chip design requirement.The system shown invention additionally discloses a kind of analog- and digital- combination drive display unit and a kind of drive circuit of analog- and digital- combination drive.
Description
Technical field
Method, system and the drive circuit shown the present invention relates to display unit, and in particular to analog- and digital- combined drive
Method, system and the drive circuit that dynamic display unit is shown.
Background technology
The active display device such as traditional LED, QLED, OLED, Micro-LED and Micro-OLED, usually all passes through
The display driving to sub-pixel is realized in the type of drive of simulation, such as voltage driving or electric current driving.In order to realize high gray, height
Contrast, the image display of high dynamic range, traditional type of drive require driving chip must be in less driving voltage
Or in drive current range, the display grayscale of 256 grades of even more highs is syncopated as by high-precision digital analog converter.This is to driving
Chip, manufacturing process and material are proposed very high requirement, also directly affects the yields of product.Meanwhile traditional make
The analog-driven mode driven with voltage driving or electric current, the fluorescent lifetime of each sub-pixel is identical, even relatively low gray scale
Sub-pixel is also required to maintain the fluorescent lifetime of an almost frame, this considerably increases the difficulty of the gray scale control of low gray scale image,
The waste of power consumption is caused, is unfavorable for the active such as LED, OLED, QLED and Micro-OLED light-emitting display device or the work(of equipment
Consumption control.
For this reason, it may be desirable to seek a kind of technical solution, at least to mitigate the above problem.
The content of the invention
The technical problem to be solved in the present invention is, there is provided the side that a kind of analog- and digital- combination drive display unit is shown
Method, system and drive circuit, it can reduce power consumption, while reducing driving chip design requirement, significantly improve image grayscale,
Color range expressive ability, realizes that high contrast, high dynamic range are shown.
In order to solve the above technical problems, the present invention uses following technical proposals.
A kind of method that analog- and digital- combination drive display unit is shown, the display unit are active active display
Part or a sub-pixel of equipment, a pixel, one-row pixels, the display area being made of any number of pixels or all pictures
Element, this method include：
The luminosity of analog-driven amount control display unit；
Under the luminosity, digital drive amount controls the fluorescent lifetime of the display unit.
Before the analog-driven amount and digital drive amount control the display unit to shine, further include：
Determine the combination of the analog-driven amount and digital drive amount for controlling the display unit to shine.
The combination of definite the analog-driven amount and digital drive amount that control the display unit to shine includes：
Analyze to obtain the light characteristic of all display units in a two field picture by image analysis algorithm；
The characteristics of luminescence of the display unit obtained according to design or test, determines at least one brightness of the display unit
Threshold value；
The mould for determining to control the display unit to shine according to obtained light characteristic and identified luminance threshold
Intend the combination of drive volume and digital drive amount.
The light characteristic for average luminous characteristics, maximum brightness characteristic, minimum brightness characteristic or Luminance Distribution characteristic its
Middle one kind.
The mould for determining to control the display unit to shine according to obtained light characteristic and identified luminance threshold
The specific method for intending the combination of drive volume and digital drive amount is：
When the light characteristic of the display unit is more than the luminance threshold of the display unit, increase controls display unit hair
The analog-driven amount of light, and on-off times and/or the time of the digital drive amount for controlling the display unit to shine are reduced, or
Person reduces the analog-driven amount for controlling the display unit to shine, and increases the digital drive amount for controlling the display unit to shine
On-off times and/or the time；
Alternatively, when the light characteristic of the display unit is less than or equal to the luminance threshold of the display unit, reduce control
The analog-driven amount that the display unit shines, and increase the on-off times for the digital drive amount for controlling the display unit to shine
And/or the time, or increase the analog-driven amount for controlling the display unit to shine, and reduce and control the display unit to shine
Digital drive amount on-off times and/or the time.
A kind of display system of analog- and digital- combination drive display unit, the display unit are active active display
Part or a sub-pixel of equipment, a pixel, one-row pixels, the display area being made of any number of pixels or all pictures
Element, the system include：
Analog-driven unit, the analog-driven amount for the luminosity of the output control display unit；
Digital drive unit, for exporting the digital drive for the fluorescent lifetime that the display unit is controlled under the luminosity
Amount.
Analysis of image data processing unit is further included, which is used in the analog-driven list
Before member and the digital drive unit control display unit shine, the analog-driven for controlling the display unit to shine is determined
The combination of amount and digital drive amount.
The combination of definite the analog-driven amount and digital drive amount that control the display unit to shine includes：
Analyze to obtain the light characteristic of all display units in a two field picture by image analysis algorithm；
The characteristics of luminescence of the display unit obtained according to design or test, determines at least one brightness of the display unit
Threshold value；
The mould for determining to control the display unit to shine according to obtained light characteristic and identified luminance threshold
Intend the combination of drive volume and digital drive amount.
The light characteristic for average luminous characteristics, maximum brightness characteristic, minimum brightness characteristic or Luminance Distribution characteristic its
Middle one kind.
The mould for determining to control the display unit to shine according to obtained light characteristic and identified luminance threshold
The specific method for intending the combination of drive volume and digital drive amount is：
When the light characteristic of the display unit is more than the luminance threshold of the display unit, increase controls display unit hair
The analog-driven amount of light, and on-off times and/or the time of the digital drive amount for controlling the display unit to shine are reduced, or
Person reduces the analog-driven amount for controlling the display unit to shine, and increases the digital drive amount for controlling the display unit to shine
On-off times and/or the time；
Alternatively, when the light characteristic of the display unit is less than or equal to the luminance threshold of the display unit, reduce control
The analog-driven amount that the display unit shines, and increase the on-off times for the digital drive amount for controlling the display unit to shine
And/or the time, or increase the analog-driven amount for controlling the display unit to shine, and reduce and control the display unit to shine
Digital drive amount on-off times and/or the time.
A kind of drive circuit of analog- and digital- combination drive, including：
Driving transistor, its grid are used to input digital drive amount, its drain electrode is connected with the anode electrical of display unit, should
The cathode of display unit is electrically connected with common electric voltage；
First switch unit, its first end are used to input analog-driven amount, its second end is used to input scanning signal；
Second switch unit, the source electrode of its first end and the driving transistor are electrically connected, its second end and described the
The 3rd end electrical connection of one switch element, its 3rd end is electrically connected with operating voltage cathode；
Wherein, the connection of first and third end or disconnection of the second end control first switch unit of first switch unit；Second opens
Close the first and third end connection of the second end control second switch unit of unit or disconnect.
Further include the capacitance between the 3rd end for being connected across the first switch unit and common ground.
The present invention has following advantageous effects.
The present invention utilizes the luminosity of analog-driven amount control display unit；Meanwhile under the luminosity, utilize number
The fluorescent lifetime of word drive amount control display unit.Shone by the combination of luminosity and fluorescent lifetime to display unit progress
Control, realizes more rich grayscale and color, has not only solved the tailing problem of high-frequency digital type of drive, but also solve DAC
Limitation of the performance to high-res analog-driven, significantly improves grayscale, the color range expressive ability of image, realizes high contrast, height
Dynamic range is shown, while reduces system power dissipation and driving chip design requirement.
Brief description of the drawings
Fig. 1 is a kind of existing OLED analog drive circuits.
Fig. 2 is voltage/current and the correspondence schematic diagram of gray scale in OLED analog-drivens.
Fig. 3 is the comparison schematic diagram of OLED analog-drivens and light emitting control in numerical model analysis driving.
Fig. 4 is a kind of driving circuit structure schematic diagram of the simulation and digital combination drive of the present invention.
Fig. 5 is the system architecture schematic diagram that a kind of analog- and digital- combination drive display unit of the present invention is shown.
Fig. 6 is the combination drive schematic diagram to any one OLED subpixel in the present invention.
Fig. 7 is the combination drive schematic diagram to any one OLED pixel unit in the present invention.
Fig. 8 is to the combination drive schematic diagram of any a line OLED pixel unit in the present invention.
Fig. 9 is the combination drive schematic diagram to the display area being made of any number of pixels in the present invention.
Figure 10 is the combination drive schematic diagram to all pixels in the present invention.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with the embodiment of the present invention
Attached drawing, the technical solution in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
It is 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 all other embodiments obtained without making creative work, belong to the scope of protection of the invention.
In the case of not conflicting, the feature in embodiment and embodiment in the present invention can be mutually combined.Although also, flowing
Logical order is shown in journey figure, but in some cases, can be with different from shown or described by order execution herein
The step of.
Unless stated otherwise, the terms " first ", " second ", " the 3rd " do not represent order, do not represent yet and take therewith
The importance for the term matched somebody with somebody.
In addition, the terms "and/or", is only a kind of incidence relation for describing affiliated partner, represents there may be
Three kinds of relations, for example, A and/or B, can represent：Individualism A, while there are A and B, these three situations of individualism B.
Present invention may apply to the active light-emitting display device such as LED, OLED, QLED, Micro-LED and Micro-OLED
Or equipment.
In the present invention, the active such as OLED light-emitting display device or equipment are made of some pixels, and each pixel is again comprising several
A sub-pixel.According to the classification of sub-pixel, active light-emitting display device or equipment can be divided into RGB system and RGBW system,
Each pixel of RGB system includes 1 red sub-pixel, 1 green sub-pixels and 1 blue subpixels.Occur in recent years
RGBW system then includes 1 red sub-pixel, 1 green sub-pixels, 1 blue subpixels and 1 white sub-pixels.
For example OLED is organic elctroluminescent device, drive circuit inputs a specific electricity to OLED subpixel
Pressure or electric current, after the compensation circuit of OLED subpixel, electric current flows through luminescent material, and OLED subpixel, which is lit, to be started to send out
Light, such as Fig. 1, are the OLED drive of typical 2T1C structures.Traditional OLED shows that type of drive is to OLED subpixel
Apply the analogue stimulus signal of voltage or electric current, such as the S101 in Fig. 1.Pass through the voltage or current-mode of control input to sub-pixel
Intend the intensity of signal, the control to OLED subpixel luminosity is realized, such as the S201 in Fig. 2.Driven in traditional analog signal
In flowing mode, the lighting time of each OLED subpixel is identical, such as the S301 in Fig. 3.
In order to realize high gray, high contrast, the image display of high dynamic range, traditional type of drive requires to drive
Chip must be syncopated as 256 grades very in less driving voltage or drive current range by high-precision digital analog converter
To the display grayscale of higher.This is proposed driving chip, manufacturing process and material very high requirement, also directly affects product
Yields.Meanwhile traditional analog-driven mode driven using voltage driving or electric current, such as, drive OLED subpixel
Shine, the fluorescent lifetime of each OLED subpixel is identical, even the OLED subpixel of relatively low gray scale is also required to maintain almost one
The fluorescent lifetime of frame, this greatly increases the difficulty of the gray scale control of low gray scale image, also results in the waste of power consumption, is unfavorable for
The power consumption control of the active such as OLED, QLED and Micro-OLED light-emitting display device or equipment.
In the present invention, display unit can be that LED, OLED, QLED, Micro-LED and Micro-OLED etc. actively shine
Display device or a sub-pixel of equipment, a pixel, one-row pixels, the display area being made of any number of pixels or institute
There is pixel.For example display unit can be a LED sub-pixel, an OLED subpixel, a QLED sub-pixel or one
Micro-OLED sub-pixels, display unit can also be a line LED sub-pixels, a line OLED pixel, a line QLED pixels or one
Row Micro-OLED pixels, etc., other situations and so on.
To improve the deficiency of conventional ADS driving mode, the present invention proposes technical solution hereinafter.
The present invention proposes a kind of method that analog- and digital- combination drive display unit is shown, this method includes：Simulation is driven
The luminosity of momentum control display unit；Under the luminosity, digital drive amount controls the fluorescent lifetime of the display unit.
The active such as traditional LED, OLED, QLED, Micro-LED and Micro-OLED light-emitting display device or device drives
Method uses analog-driven mode, such as voltage driving or electric current driving, by controlling the analog-driven amount such as voltage or electric current
Intensity, realizes the control to the luminosity of display unit, so as to fulfill different display grayscale and color, as shown in Figure 2.
Under this type of drive, each display unit of the active such as LED, OLED, QLED, Micro-OLED light-emitting display device or equipment
Lighting time it is identical, as shown in S301 in Fig. 3.The present invention on the basis of the structure and type of drive of existing display unit,
By introducing digital drive mode, as shown in figure 4, under the luminosity for the display unit L that analog-driven amount is controlled, utilize
Digital drive amount controls the fluorescent lifetime of the display unit, display unit is shown more grayscale, while reduces simulation
Drive the design difficulty of IC.As it can be seen that the present invention realizes more rich grayscale and color by the combination of luminosity and fluorescent lifetime
Coloured silk, while reduce the design difficulty of system power dissipation and analog-driven IC.
The principle of digital drive mode is radiation intensity of the identical light radiation intensity on human eye retina and action time t
Integrating effect, make human eye produce luminance difference, form different grayscale and color.
In formula (1), Ψ (t) represents instantaneous light emission brightness.
The realization of digital drive mode, is under conditions of some definite analog-driven amount, by controlling each show
Show the such as each OLED subpixel of unit or the often lighting time of row OLED subpixel, regarded by identical light radiation intensity in human eye
Radiation intensity and the integrating effect of action time t on nethike embrane, under identical analog-driven amount, to realize different display units
Between display gray scale.At this moment the moment luminosity of each display unit is identical, because the difference of lighting time, and produces
Raw luminance difference, which is realized, shows grayscale, as shown in S302, S303, S304 in Fig. 3.
As it can be seen that the present invention is shone using analog-driven and digital drive hybrid mode control display unit, that is, pass through simulation
Drive volume, such as electric current driving or voltage driving, the brightness of control display unit, and by digital drive amount, such as pwm signal,
The lighting time of control display unit.Such as to an OLED subpixel (S401 in such as Fig. 6), an OLED pixel (as schemed
S501 in 7), a line OLED pixel (S601 in such as Fig. 8), display area (such as Fig. 9 being made of any number of OLED pixels
In S701) or all OLED pixels (S801 in such as Figure 10) carried out by the way of analog-driven is mixed with digital drive
Driving, is realized to a sub-pixel in a two field picture, a pixel, one-row pixels, the display being made of any number of pixels
The accurate control of the grayscale and color of region or all pixels, shows so as to fulfill high contrast and high dynamic range.
For example under analog-driven mode, n color range is marked off, it is A (0), A (1), A (2) ... A (n) respectively.Numeral is driven
Under flowing mode, m color range is marked off, is D (0), D (1), D (2) ... D (m) respectively.So each display unit in theory
Color range G is：
G=A (x) × D (y), 0≤x≤n, 0≤y≤m, and x, y ∈ N；
Consider the grayscale repeated, then total gray number that analog-driven can be covered with digital driveIts
In,Represent that the number of permutations calculates.
For prime number grayscale, it is impossible to direct analog-driven and a digital drive realization, can be by even multiple twice
Digital drive is realized.Such as 59 the realization of grayscale (being denoted as G59) can use：G59=G58+G1 or G59=G56+G3.First
58 grayscale are realized when lighting for the first time, then secondary light realizes 1 grayscale, is realized by human eye integrating effect and is equivalent to 59 ashes
The brightness of rank, as shown in S304 in Fig. 3.
In the display system of analog- and digital- combination drive, selection to analog-driven amount and digital drive amount is to closing weight
Will.In practical application, such as, a dedicated analysis of image data processing unit can be designed view data is carried out at analysis
Reason, as shown in Figure 5.For example before analog-driven amount and digital drive amount control display unit shine, determine to control the display
The analog-driven amount and the combination of digital drive amount that unit shines.
Determining the combination for the analog-driven amount and digital drive amount for controlling the display unit to shine includes：Pass through image
Parser analyzes to obtain the light characteristic of all display units in a two field picture.The display unit can such as frame figure
A sub-pixel, a pixel unit, one-row pixels, the display area being made of any number of pixels or all pictures as in
Element.The characteristics of luminescence of the display unit obtained further according to design or test, determines at least one luminance threshold of the display unit
Value.Then the simulation for controlling the display unit to shine is determined according to obtained light characteristic and identified luminance threshold
The combination of drive volume and digital drive amount, to realize preferable display effect.
In the present invention, light characteristic is average luminous characteristics, maximum brightness characteristic, minimum brightness characteristic or Luminance Distribution are special
Property one of which.
The simulation for how determining to control the display unit to shine is driven so that light characteristic is average luminous characteristics as an example hereinafter
The combination of momentum and digital drive amount illustrates.
Brightness first to all display units in each two field picture carries out average brightness statistics,
APL is average brightness, and N is the total line number of video, is the total columns of video, Pi,jIt is single for the i-th row, jth row display in image
Member, such as foregoing OLED subpixel.
Then according to the different values of APL, and it is true according to the characteristics of luminescence for designing or testing obtained display unit
Fixed one or more average brightness threshold value, chooses the combination of different analog-driven amounts and digital drive amount.On numeral
The combination of drive volume and analog-driven amount, for more preferable display effect, each two field picture can use different groups
Conjunction mode.Foundation using various combination mode is the statistics APL to the average brightness of the display unit in this two field picture.
APLth is average brightness threshold value, and work is produced by image processing algorithm and light-emitting display device or equipment such as OLED
The factors such as skill determine that the value of APLth needs to confirm according to sample tests in practice, and APLth can be one or more
It is a.For example, one or more can be determined according to the physical characteristic (every kind of screen/there be not the screen of batch may be all different) of display screen
Average brightness threshold value, can be with when the average brightness of this two field picture that statistics obtains falls in different average brightness threshold intervals
Using corresponding digital drive amount and the combination of analog-driven amount.In different display screens, the value of APLth can be
One or more, the combination of corresponding two or more analog-drivens and digital drive.
For example, when taking an APLth, analog-driven amount and the combination of digital drive amount are：
Wherein,Represent when average brightness is less than or equal to APLth, to the analog-driven of each display unit
Function, is driven with less analogue drive current or voltage.
ρ0(Pi,j) represent when average brightness is less than or equal to APLth, to the digital drive function of each display unit,
Increase on-off times and/or the time of digital drive, make it preferably to show low gray scale image.
Represent when average brightness is more than APLth, it is larger to the analog-driven function of each display unit, use
Analogue drive current or voltage driving.
ρ1(Pi,j) represent when average brightness is more than APLth, to the digital drive function of each display unit, reduce number
The on-off times of word drive and/or time.
For example, when the average brightness of the display unit is more than the APLth of the display unit, increase controls the display unit
The luminous analog-driven amount, and on-off times and/or the time of the digital drive amount for controlling the display unit to shine are reduced,
Or reduce the analog-driven amount for controlling the display unit to shine, and increase the digital drive for controlling the display unit to shine
The on-off times of amount and/or time.When the average brightness of the display unit is less than or equal to the APLth of the display unit, subtract
The small analog-driven amount for controlling the display unit to shine, and increase opening for the digital drive amount for controlling the display unit to shine
Close number and/or time, or increase controls the analog-driven amount that the display unit shines, and reduce and control the display list
The on-off times of the luminous digital drive amount of member and/or time.Reduce the analog-driven amount, and increase opening for digital drive amount
Number and/or time are closed, with increasing the analog-driven amount, and reduces the on-off times of digital drive amount and/or between the time
It is different with the proportion in analog-driven amount combination difference lies in digital drive amount.For example realize a display brightness 100,
Combination 1：Simulation 30, numeral 70；Combination 2：Simulation 70, numeral 30.The core of the present invention be by existing single digital drive or
Analog-driven, becomes the combination of digital drive and analog-driven, overcomes the various drawbacks of single drive mode.
The present invention is realized to LED, OLED, QLED, Micro-LED and Micro-OLED etc. actively by the above method
Light-emitting display device or a sub-pixel of equipment, a pixel, one-row pixels, the display area being made of any number of pixels
Or the grayscale of all pixels and the accurate control of color, simplifying the active luminescence displays such as LED, OLED, QLED, Micro-OLED
While device or equipment simulating drive circuit, low-power consumption and high contrast, high dynamic range display effect are realized.
Fig. 5 is the system architecture schematic diagram that a kind of analog- and digital- combination drive display unit of the present invention is shown.This hair
The system that a kind of bright analog- and digital- combination drive display unit is shown includes analysis of image data processing unit 1, simulation is driven
Moving cell 2 and digital drive unit 3.
Analog-driven unit 2 is used for the analog-driven amount of the luminosity of the output control display unit.
Digital drive unit 3 is used for the digital drive for exporting the fluorescent lifetime that the display unit is controlled under the luminosity
Amount.
Analysis of image data processing unit 1 is used to send out in analog-driven unit 2 and 3 control display unit of digital drive unit
Before light, the combination for the analog-driven amount and digital drive amount for controlling the display unit to shine is determined.
In certain embodiments, the combination side for the analog-driven amount and digital drive amount for controlling the display unit to shine is determined
Formula includes：
Determine the combination of the analog-driven amount and digital drive amount for controlling the display unit to shine.
In certain embodiments, the group of the analog-driven amount and digital drive amount for controlling the display unit to shine is determined
Conjunction mode includes：
Analyze to obtain the light characteristic of all display units in a two field picture by image analysis algorithm；
The characteristics of luminescence of the display unit obtained according to design or test, determines at least one brightness of the display unit
Threshold value；
The mould for determining to control the display unit to shine according to obtained light characteristic and identified luminance threshold
Intend the combination of drive volume and digital drive amount.
In certain embodiments, light characteristic is average luminous characteristics, maximum brightness characteristic, minimum brightness characteristic or brightness
Distribution character one of which.
In certain embodiments, determined to control the display list according to obtained light characteristic and identified luminance threshold
The specific method of the combination of member luminous the analog-driven amount and digital drive amount is：
When the light characteristic of the display unit is more than the luminance threshold of the display unit, increase controls display unit hair
The analog-driven amount of light, and on-off times and/or the time of the digital drive amount for controlling the display unit to shine are reduced, or
Person reduces the analog-driven amount for controlling the display unit to shine, and increases the digital drive amount for controlling the display unit to shine
On-off times and/or the time；
Alternatively, when the light characteristic of the display unit is less than or equal to the luminance threshold of the display unit, reduce control
The analog-driven amount that the display unit shines, and increase the on-off times for the digital drive amount for controlling the display unit to shine
And/or the time, or increase the analog-driven amount for controlling the display unit to shine, and reduce and control the display unit to shine
Digital drive amount on-off times and/or the time.
Above-mentioned display unit can be active light-emitting display device or a sub-pixel, a pixel, a line picture of equipment
Element, the display area being made of any number of pixels or all pixels.
Fig. 4 is a kind of driving circuit structure schematic diagram of the simulation and digital combination drive of the present invention.One kind of the present invention
The drive circuit of analog- and digital- combination drive includes driving transistor T3, first switch unit 4, second switch unit 5.
The grid of driving transistor T3 is used to input digital drive amount, its drain electrode is connected with the anode electrical of display unit L,
The cathode of display unit L is electrically connected with common electric voltage Vcom.
The first end 41 of first switch unit 4 is used to input analog-driven amount, its second end 42 is used to input scanning signal
Scan。
The first end 51 of second switch unit 5 is electrically connected with the source electrode of driving transistor T3, its second end 52 and first
3rd end 43 of switch element 4 is electrically connected, its 3rd end 53 is electrically connected with operating voltage cathode Vdd.
Wherein, the second end 42 of first switch unit 4 controls first and third end 41,43 of first switch unit 4 to connect on-off
Open；The second end 52 of second switch unit 5 controls first and third end 51,53 connection of second switch unit 5 or disconnects.
Above-mentioned first switch unit 4 includes N-channel MOS pipe T1, its first end 41 is the drain electrode of the N-channel MOS pipe, it the
Two ends 42 are the grid of the N-channel MOS pipe, its 3rd end is the source electrode of the N-channel MOS pipe.
Above-mentioned second pass unit 5 includes P-channel metal-oxide-semiconductor T2, its first end 51 is the drain electrode of the P-channel metal-oxide-semiconductor, it second
End 52 is the grid of the P-channel metal-oxide-semiconductor, its 3rd end is the source electrode of the P-channel metal-oxide-semiconductor.
Above-mentioned driving transistor T3 is P-channel metal-oxide-semiconductor.
In possible embodiment, a kind of drive circuit of analog- and digital- combination drive of the invention, which further includes, is connected across
Capacitance C between 3rd end 43 of one switch element 4 and common ground GND.
The system that the analog- and digital- combination drive display unit is shown can be used for the method for performing the present invention, therefore close
The function that each functional unit can be realized in the system that the analog- and digital- combination drive display unit is shown, refers to this
Corresponding description in the embodiment of inventive method, seldom repeats.
In embodiment provided by the present invention, it should be understood that disclosed system and method, can pass through others
Mode is realized.For example, system embodiment described above is only schematical, for example, the division of the unit, is only
A kind of division of logic function, can there is an other dividing mode when actually realizing, for example, multiple units or component can combine or
Person is desirably integrated into another system, or some features can be ignored, or does not perform.Another, shown or discussed is mutual
Between coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some interfaces, system or unit
Connect, can be electrical, machinery or other forms.
The unit illustrated as separating component may or may not be physically separate, you can with positioned at
One place, or can also be distributed in multiple network unit.Can select according to the actual needs part therein or
Whole units realize the purpose of this embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units integrate in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, can also be realized in the form of SFU software functional unit.
If the integrated unit is realized in the form of SFU software functional unit and is used as independent production marketing or use
When, it can be stored in a computer read/write memory medium.Based on such understanding, technical scheme is substantially
The part to contribute in other words to the prior art or all or part of the technical solution can be in the form of software products
Embody, which is stored in a storage medium, including some instructions are used so that a computer
It is each that equipment (can be personal computer, server, or network equipment etc.) or processor (processor) perform the present invention
The all or part of step of embodiment the method.And foregoing storage medium/unit includes：General serial bus USB
(Universal Serial Bus flash disk), mobile hard disk, read-only storage (Read-Only Memory, ROM),
Random access memory (Random Access Memory, RAM), magnetic disc or CD etc. are various can be with store program codes
Medium.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and scope.In this way, if these modifications and changes of the present invention belongs to the scope of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to comprising including these modification and variations.
Claims (12)
1. a kind of method that analog- and digital- combination drive display unit is shown, the display unit is active light-emitting display device
Or a sub-pixel, a pixel, one-row pixels, the display area being made of any number of pixels or all pixels of equipment,
It is characterized in that, this method includes：
The luminosity of analog-driven amount control display unit；
Under the luminosity, digital drive amount controls the fluorescent lifetime of the display unit.
2. according to the method described in claim 1, it is characterized in that, described in the analog-driven amount and the control of digital drive amount
Before display unit shines, further include：
Determine the combination of the analog-driven amount and digital drive amount for controlling the display unit to shine.
3. the according to the method described in claim 2, it is characterized in that, definite simulation for controlling the display unit to shine
The combination of drive volume and digital drive amount includes：
Analyze to obtain the light characteristic of all display units in a two field picture by image analysis algorithm；
The characteristics of luminescence of the display unit obtained according to design or test, determines at least one luminance threshold of the display unit
Value；
Driven according to the simulation that obtained light characteristic and identified luminance threshold determine to control the display unit to shine
The combination of momentum and digital drive amount.
4. according to the method described in claim 3, it is characterized in that, the light characteristic is average luminous characteristics, maximum brightness
Characteristic, minimum brightness characteristic or Luminance Distribution characteristic one of which.
5. according to the method described in claim 3, it is characterized in that, according to obtained light characteristic and identified luminance threshold
Value determines to control the specific method of the combination for the analog-driven amount and digital drive amount that the display unit shines be：
When the light characteristic of the display unit is more than the luminance threshold of the display unit, increase controls what the display unit shone
The analog-driven amount, and on-off times and/or the time of the digital drive amount for controlling the display unit to shine are reduced, or subtract
The small analog-driven amount for controlling the display unit to shine, and increase opening for the digital drive amount for controlling the display unit to shine
Close number and/or time；
Alternatively, when the light characteristic of the display unit is less than or equal to the luminance threshold of the display unit, reducing control, this is aobvious
Show the analog-driven amount that unit shines, and increase the digital drive amount for controlling the display unit to shine on-off times and/
Or the time, or increase the analog-driven amount for controlling the display unit to shine, and reduce and control what the display unit shone
The on-off times of digital drive amount and/or time.
6. a kind of display system of analog- and digital- combination drive display unit, the display unit is active light-emitting display device
Or a sub-pixel, a pixel, one-row pixels, the display area being made of any number of pixels or all pixels of equipment,
It is characterized in that, the system includes：
Analog-driven unit, the analog-driven amount for the luminosity of the output control display unit；
Digital drive unit, for exporting the digital drive amount for the fluorescent lifetime that the display unit is controlled under the luminosity.
7. system according to claim 6, it is characterised in that further include analysis of image data processing unit, the picture number
It is used for according to analysis and processing unit before the analog-driven unit and digital drive unit control the display unit to shine, really
Surely the combination for the analog-driven amount and digital drive amount that the display unit shines is controlled.
8. system according to claim 7, it is characterised in that the definite simulation for controlling the display unit to shine
The combination of drive volume and digital drive amount includes：
Analyze to obtain the light characteristic of all display units in a two field picture by image analysis algorithm；
The characteristics of luminescence of the display unit obtained according to design or test, determines at least one luminance threshold of the display unit
Value；
Driven according to the simulation that obtained light characteristic and identified luminance threshold determine to control the display unit to shine
The combination of momentum and digital drive amount.
9. system according to claim 8, it is characterised in that the light characteristic is average luminous characteristics, maximum brightness
Characteristic, minimum brightness characteristic or Luminance Distribution characteristic one of which.
10. according to the method described in claim 8, it is characterized in that, according to obtained light characteristic and identified brightness
Threshold value determines that the specific method of the combination for the analog-driven amount and digital drive amount for controlling the display unit to shine is：
When the light characteristic of the display unit is more than the luminance threshold of the display unit, increase controls what the display unit shone
The analog-driven amount, and on-off times and/or the time of the digital drive amount for controlling the display unit to shine are reduced, or subtract
The small analog-driven amount for controlling the display unit to shine, and increase opening for the digital drive amount for controlling the display unit to shine
Close number and/or time；
Alternatively, when the light characteristic of the display unit is less than or equal to the luminance threshold of the display unit, reducing control, this is aobvious
Show the analog-driven amount that unit shines, and increase the digital drive amount for controlling the display unit to shine on-off times and/
Or the time, or increase the analog-driven amount for controlling the display unit to shine, and reduce and control what the display unit shone
The on-off times of digital drive amount and/or time.
A kind of 11. drive circuit of analog- and digital- combination drive, it is characterised in that including：
Driving transistor, its grid are used to input digital drive amount, its drain electrode is connected with the anode electrical of display unit, the display
The cathode of unit is electrically connected with common electric voltage；
First switch unit, its first end are used to input analog-driven amount, its second end is used to input scanning signal；
Second switch unit, the source electrode of its first end and the driving transistor are electrically connected, its second end is opened with described first
The 3rd end electrical connection of unit is closed, its 3rd end is electrically connected with operating voltage cathode；
Wherein, the connection of first and third end or disconnection of the second end control first switch unit of first switch unit；Second switch list
The first and third end connection of the second end control second switch unit of member disconnects.
12. drive circuit according to claim 11, it is characterised in that further include and be connected across the first switch unit
Capacitance between 3rd end and common ground.
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| CN201711110274.6A CN107993609A (en) | 2018-03-16 | 2018-03-16 | Method, system and the drive circuit that analog- and digital- combination drive display unit is shown |
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| CN201711110274.6A CN107993609A (en) | 2018-03-16 | 2018-03-16 | Method, system and the drive circuit that analog- and digital- combination drive display unit is shown |
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