CN109300432A - The method that gray level image shows signal driving is carried out in monochromatic display panel - Google Patents
The method that gray level image shows signal driving is carried out in monochromatic display panel Download PDFInfo
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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]
- G09G3/3216—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 a passive matrix
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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]
Abstract
A method of it carrying out gray level image in monochromatic display panel and shows signal driving, it allows to generate greyscale pattern using monochromatic PMOLED display driver in the case where having no need to change the resolution ratio of 1 digit mode converter (DAC) on data line (SEG).This method can also exempt frame buffer display-memory additional needed for typical method；It is realized using sacrificing display resolution as cost by the display memory space of exchange display image pixel color (gray scale) depth.This method further allows only by greyscale pattern data write-once frame buffer, without the additional control of host controller.In addition, this method also allows to select the quantity of gray scale scanning line in dynamic application, so as to show full gray level image or monochromatic and gray level image mixing in single display panel.
Description
Technical field
The present invention relates to driving including the light emitting diode (LED) of Organic Light Emitting Diode (OLED), monochrome display with
Realize the technology of gray level image effect.
Background technique
In existing monochrome passive matrix OLED(PMOLED) it shows in application, to obtain better visual effect, need
Display greyscale pattern or image in at least one short time, for example, Display Logo during device startup.For existing aobvious
Show driver, whether have and provide the built-in mechanism of above-mentioned function, people do not know.But, the independence being commercially available
Gray level image display driver or module provide this function in monochromatic PMOLED display.In general, independent grayscale image
As display driver has full-scale embedded memory and possesses hardware more more than monochromatic display driver.Work as gray level image
Data are stored in memory, and gray level image display driver can voluntarily generate gray level image, without additional external control.And
On the other hand, the working principle of monochrome image display driver is to drive the image data write-in display to be shown of each frame
Device, and change frame rate control (FRC) to generate gray level image.It is related among these between host controller and display driver
Complex control, such as need signal timing to synchronize to prevent tearing effect.
Summary of the invention
According to various embodiments of the present invention, it provides a method, on having no need to change data line (SEG)
In the case where the resolution ratio of 1 digit mode converter (DAC), allow to generate grayscale image using monochromatic PMOLED display driver
Case.This method can also exempt frame buffer display-memory additional needed for typical method；It is to sacrifice display resolution
For cost, realized by the display memory space of exchange display image pixel color (gray scale) depth.This method can also incite somebody to action
Greyscale pattern data are only primary to be just written frame buffer, without the additional control of host controller.In addition, this method allows
The quantity of gray scale scanning line is selected in dynamic application, so as to show full gray level image or monochrome and ash in single display panel
Spend the mixing of image.The present invention can also be used to improve gray level image display driver, so that the conventional grayscale image with n DAC
As display driver can be enhanced to generate more than 2nA gray level.
Detailed description of the invention
Below with reference to the attached drawing embodiment that the present invention will be described in more detail, in which:
Fig. 1 a is the pixel circuit figure of conventional PMOLED display panel；Fig. 1 b is believed according to the driving of typical signal driving method
The corresponding timing diagram number on the data line of conventional PMOLED display panel and scan line；
Fig. 2 a is to generate the driving signal of signal driving method in conventional PMOLED display panel according to typical only monochrome image
Data line and scan line on exemplary timing chart；Fig. 2 b is the state diagram of the corresponding pixel of driving signal shown in Fig. 2 a；
Fig. 3 a is number of the driving signal in conventional PMOLED display panel that signal driving method is generated according to typical grayscale image
According to the exemplary timing chart on line and scan line；Fig. 3 b is the state diagram of the corresponding pixel of driving signal shown in Fig. 3 a；
Fig. 4 a is that the gray level image that first embodiment provides according to the present invention generates the driving signal of signal driving method normal
Advise the exemplary timing chart on the data line and scan line of PMOLED display panel；Fig. 4 b is that driving signal shown in Fig. 4 a is corresponding
Pixel state diagram；
Fig. 5 a is that the gray level image that second embodiment provides according to the present invention generates the driving signal of signal driving method normal
Advise the exemplary timing chart on the data line and scan line of PMOLED display panel；Fig. 5 b is that driving signal shown in Fig. 5 a is corresponding
Pixel state diagram；
Fig. 6 a is that the gray level image that third embodiment provides according to the present invention generates the driving signal of signal driving method normal
Advise the exemplary timing chart on the data line and scan line of PMOLED display panel；Fig. 6 b is that driving signal shown in Fig. 6 a is corresponding
Pixel state diagram；
Fig. 7 a is that the gray level image that the 4th embodiment provides according to the present invention generates the driving signal of signal driving method normal
Advise the exemplary timing chart on the data line and scan line of PMOLED display panel；Fig. 7 b is that driving signal shown in Fig. 7 a is corresponding
Pixel state diagram；
Fig. 8 a is that the gray level image that the 5th embodiment provides according to the present invention generates the driving of signal driving method driving method
Exemplary timing chart of the signal on the data line and scan line of conventional PMOLED display panel；Fig. 8 b is driving letter shown in Fig. 8 a
The state diagram of number corresponding pixel；
Fig. 9 is the one of the mixed display monochrome in single display panel that each embodiment provides according to the present invention and gray level image
Kind schematic diagram；
Figure 10 is mixed display monochrome and the gray level image in single display panel that each embodiment provides according to the present invention
Another schematic diagram；
Figure 11 a is the grayscale image suitable for 2 gray level image display drivers provided according to embodiment of the present invention
As generate signal drive scheme the driving signal on the data line and scan line of conventional PMOLED display panel it is exemplary when
Sequence figure；And Figure 11 b shows the state of pixel corresponding with driving signal shown in Figure 11 a；And
Figure 12 a is the gray scale suitable for 2 gray level image display drivers provided according to another implementation of the invention
Image generates the exemplary of driving signal of the signal drive scheme on the data line and scan line of conventional PMOLED display panel
Timing diagram；And Figure 12 b shows the state of pixel corresponding with driving signal shown in Figure 12 a.
Specific embodiment
Following description generates the preferable example of the method and apparatus of gray level image by illustrating in display and similar devices.
It will be evident for a person skilled in the art that without departing from the scope and spirit of the present invention, can do
It modifies out, including adds and/or replace.Although in order to avoid the fuzzy present invention can be omitted detail, in the disclosure
It is described in appearance to allow those skilled in the art to implement teaching herein in the case where not needing excessive experiment.
With reference to Fig. 1 a and Fig. 1 b, wherein depicting the working principle of PMOLED.In PMOLED display panel, pixel has
The electrical characteristics of diode, when the voltage in pixel is greater than threshold voltage, diode current flow.The brightness of pixel is also with flowing through pixel
The magnitude of current it is related, although the two is not linear relationship.But the brightness of pixel is almost linearly closed with its duty ratio
System, duty ratio correspond to the time that pixel is switched on.The common driving method of PMOLED display panel is included in every row scanning and opens
Pixel is pre-charged to by its threshold voltage by data line (SEG) when the beginning；Hereafter, driving current is to SEG so that pixel is connected.
In order to illustrate more clearly of the present invention, embodiments described herein assumes the parasitism in PMOLED display panel
Resistance and parasitic capacitance are insignificant.It is therefore contemplated that be to the precharge of pixel completed within the time close to 0, and
The brightness of pixel is connected with the ON(of pixel in primary line scans) time is linearly proportional.In the rest part of this paper,
Term " monochrome " means that the DAC on every data line SEG has 1 bit resolution, and pixel can be only in OFF(cut-off) or
Person ON(conducting) state (although the brightness of pixel still by drive signal waveform data line SEG on be ON(high level) continued
The influence of time (such as pulse width) or current amplitude).Term " gray scale " indicates that the DAC of every SEG has point more than 1
Resolution；Therefore, using n DAC available 2nGray level, and pass through 2nDrive signal waveform pattern carry out driving data line
SEG can show 2 in every scan linenBrightness.
With reference to Fig. 2 a and Fig. 2 b.In typical monochrome driving method, scan line (COM) is touched one by one in the different time-gap of a frame
Send out scan line (COM) (such as triggering COM (j) in time slot j)；Then, the state of pixel takes during time slot j on data line SEG
Certainly in the state of data line SEG.For example, if SEG (i) is during time slot j by ON(high level) drive waveform, pixel
(i, j) is that the ON(of brightness 100% is connected) state；If SEG (i+1) is in time slot j+1 by OFF(low level) drive waveform,
Pixel (i+1, j+1) is that the OFF(of brightness 0% ends) state.
With reference to Fig. 3 a and Fig. 3 b.In a kind of typical grey driving method, in the different time-gap driver sweep one by one of a frame
Line COM(for example triggers COM (j) in time slot j)；Then, the state of pixel and brightness are depended on during time slot j on data line SEG
In the state and duty ratio of data line SEG.For example, if SEG (i) is driven during time slot j by the ON waveform of duty ratio 100%
Dynamic, then pixel (i, j) is the ON state of brightness 100%；If SEG (i+1) is during time slot j by the ON waveform of duty ratio 50%
Driving, then pixel (i+1, j) is the ON state of brightness 50%；If SEG (i) is during time slot j+1 by the ON wave of duty ratio 25%
Shape driving, then pixel (i, j+1) is the ON state of brightness 25%；And if SEG (i+1) is driven during time slot j+1 by OFF waveform
Dynamic, then pixel (i+1, j+1) is the OFF state of brightness 0%.In this case, each DAC on data line SEG can be regarded
For with 2 bit resolutions.
Method and apparatus provided by the invention can in the case where not needing extra memory, make have can driving data
The monochromatic display driver of 1 DAC of line SEG is able to carry out gray level image and shows；It is integrated to will not influence display driver
The chip size of circuit (IC).This method and device are equally applicable to conventional gray scale display driver, to increase color well
Color depth.Idea of the invention is the T bit memory used, to sacrifice display resolution as cost, to indicate for showing
The gray level of each pixel in the same memory space of data.It therefore, must in order to give each pixel to use T gray levels
Display resolution must be reduced factor T according to the following formula: new display resolution=M × (N/T), wherein M is native display resolution
Maximum number of column, N is the maximum number of lines of native display resolution.
Idea of the invention also resides in, and every scan line COM is triggered in multiple time slots (T time slot) in each frame
(j), wherein 0≤j≤N-1, N are the sum (or maximum number of lines of native display resolution) of scan line, T≤N.Then, each
Pixel (i, j) is by multiple drive signal waveform Periodic signal drives on an intraframe data line SEG (i), wherein 0≤i≤M-1, M are
The sum (or maximum number of column of native display resolution) of data line.Due to have on SEG (i) during different time-gap different ON and
OFF state is controlled by frame buffer, so the brightness of different stage may be implemented in pixel (i, j).In addition, if on SEG
Drive signal waveform it is all identical in each time slot, then obtainable number of greyscale levels is T+1；And if the driving on SEG is believed
Number waveform is changed in different time slots with particular order, then obtainable number of greyscale levels is 2T。
With reference to Fig. 4 a and Fig. 4 b.First embodiment according to the present invention provides a kind of gray scale for realizing 23 grades
Grade image generating method.In the present embodiment, every scan line COM (j) is triggered during time slot 2j and 2j+1.Then,
State and brightness of the pixel (i, j) during time slot 2j and 2j+1 depend on the ON/OFF state of data line SEG (i).For example,
If SEG (i) is by OFF waveform, later during time slot 2j+1 by ON drive waveform during time slot 2j, pixel (i, j) is
The ON state of brightness 100%；If SEG (i+1) is during time slot 2j by ON waveform, later during time slot 2j+1 by OFF waveform
Driving, then pixel (i+1, j) is still the ON state of brightness 100%；If SEG (i) during time slot 2j+2 by OFF waveform, it
Afterwards by OFF drive waveform during time slot 2j+3, then pixel (i, j+1) is the OFF state of brightness 0%；And if SEG (i+1)
By ON waveform, later during time slot 2j+3 by ON drive waveform during time slot 2j+2, then pixel (i+1, j+1) is brightness
200% ON state.
With reference to Fig. 5 a and Fig. 5 b.The second embodiment according to obtained by being extended as first embodiment, by multiple
Every scan line COM (j) is triggered during meaning time slot, the generation of 23 grades of grayscale images equally may be implemented.For example, in time slot
Driver sweep line COM (j-1) during j-1, is triggered in time slot p again later；The driver sweep line COM (j) during time slot j, it
It is triggered again during time slot q afterwards；Driver sweep line COM (j+1), is touched during time slot r again later during time slot j+1
Hair, rather than triggered during continuous time slot 2j and 2j+1.In the first and second embodiments, pixel brightness (or ash
Degree grade) it is still to be determined by total duration, or ON waveform on the SEG by driving pixel within a predetermined period of time
Total number of timeslots determines.
With reference to Fig. 6 a and Fig. 6 b.According to third embodiment, in order to realize greater number of gray level, every scan line
COM (j) can be triggered in time slot more greater number of than the first two embodiment.For example, being swept for the gray level for realizing 45 grades
Retouching line COM (j) can be triggered during time slot 4j, 4j+1,4j+2 and 4j+3.Then, the state and brightness of pixel (i, j)
ON/OFF state depending on data line SEG (i) during time slot 4j, 4j+1,4j+2 and 4j+3.For example, if SEG (i) when
By OFF drive waveform during gap 4j, then by OFF drive waveform during time slot 4j+1, then by OFF wave during time slot 4j+2
Shape driving, later by ON drive waveform during time slot 4j+3, then pixel (i, j) is the ON state of brightness 100%；If SEG
(i+1) by OFF drive waveform during time slot 4j, then by OFF drive waveform during time slot 4j+1, then in the time slot 4j+2 phase
Between by ON drive waveform, later during time slot 4j+3 by ON drive waveform, then pixel (i+1, j) is the ON shape of brightness 200%
State；If SEG (i) is then existed by OFF drive waveform, then during time slot 4j+5 by ON drive waveform during time slot 4j+4
By ON drive waveform during time slot 4j+6, later by ON drive waveform during time slot 4j+7, then pixel (i, j+1) is brightness
300% ON state；And if SEG (i+1) during time slot 4j+4 by ON drive waveform, then by ON wave during time slot 4j+5
Shape driving, then by ON drive waveform during time slot 4j+6, later in time slot 4j+7 by ON drive waveform, then pixel (i+1,
It j+1 is) the ON state of brightness 400%.
With reference to Fig. 7 a and Fig. 7 b.According to the 4th embodiment, one kind is provided for realizing 24 grades of grayscale images
Generation method.In this embodiment, every scan line COM (j) is triggered during time slot 2j and 2j+1.With the first embodiment party
Unlike formula, driving is to the ON state actuation signal waveform of data line SEG with 50% during odd number (or even number) time slot
Duty ratio or with correspond to 50% pixel intensity reduced current level.This can be considered as " half-ON " (rather than " complete-
ON ") state.Therefore, during odd number (or even number) time slot, the signal waveform of OFF state or " half-ON " state can be passed through
Signal waveform carrys out driving data line SEG, and then by the signal waveform of OFF state or " complete-ON " state during other time slots
Signal waveform carrys out driving data line SEG.For example, if SEG (i) during time slot 2j by OFF drive waveform, then in time slot 2j
By " half-ON " drive waveform during+1, then pixel (i, j) is the ON state of brightness 50%；If SEG (i+1) is in the time slot 2j phase
Between by " complete-ON " drive waveform, then by OFF drive waveform during time slot 2j+1, then pixel (i+1, j) is brightness 100%
ON state；If SEG (i) during time slot 2j+2 by OFF drive waveform, then by another OFF wave during time slot 2j+3
Shape driving, then pixel (i, j+1) is the OFF state of brightness 0%；And if SEG (i+1) is during time slot 2j+2 by " complete-ON "
Drive waveform, then by " half-ON " drive waveform during time slot 2j+3, then the state of pixel (i+1, j+1) is ON and has
150% brightness.
With reference to Fig. 8 a and Fig. 8 b.According to the 5th embodiment, provide a kind of for realizing 4 16 grades of grayscale images generations
Method.In the 5th embodiment, in time slot 4j+k, during which, and k=0,1,2,3,4,5,6,7, the ON of data line SEG is arrived in driving
The duty ratio or the current level not reduced corresponding to 100% pixel intensity that state actuation signal waveform is respectively provided with 100%
(" complete-ON "), 50% duty ratio or the reduced current level (" half-ON ") corresponding to 50% pixel intensity, 25% duty ratio
Or the reduced current level (" 1/4-ON ") corresponding to 25% pixel intensity, 12.5% duty ratio or correspond to 12.5% picture
The reduced current level (" 1/8-ON ") of plain brightness, the duty ratio with 100% or not reducing corresponding to 100% pixel intensity
Current level (" complete-ON "), 50% duty ratio or the reduced current level (" half-ON ") corresponding to 50% pixel intensity,
25% duty ratio or reduced current level (" 1/4-ON ") corresponding to 25% pixel intensity, 12.5% duty ratio or right
It should be in the reduced current level (" 1/8-ON ") of 12.5% pixel intensity.This provides 16 kinds of possible pixel brightness levels, model
It encloses for from 0% to 187.5% and increment is 12.5%.For example, if SEG (i) during time slot 4j by OFF drive waveform, then when
By OFF drive waveform during gap 4j+1, then by OFF drive waveform during time slot 4j+2, later during time slot 4j+3 by
" 1/8-ON " drive waveform, then pixel (i, j) is the ON state of brightness 12.5%；If SEG (i+1) during time slot 4j by
OFF drive waveform, then by OFF drive waveform during time slot 4j+1, then driven during time slot 4j+2 by " 1/4-ON " waveform
Dynamic, later by " 1/8-ON " drive waveform during time slot 4j+3, then pixel (i+1, j) is the ON state of brightness 37.5%；Such as
Fruit SEG (i) is then existed by OFF drive waveform, then during time slot 4j+5 by " half-ON " drive waveform during time slot 4j+4
By " 1/4-ON " drive waveform during time slot 4j+6, driven during time slot 4j+7 by " 1/8-ON " later, then pixel (i, j+
It 1) is the ON state of brightness 87.5%；And if SEG (i+1) during time slot 4j+4 by " complete-ON " drive waveform, then in time slot
By " half-ON " drive waveform during 4j+5, then by " 1/4-ON " drive waveform during time slot 4j+6, later in time slot 4j+7
Period, then pixel (i+1, j+1) was the ON state of brightness 187.5% by " 1/8-ON " drive waveform.
With reference to Fig. 9.In aforementioned any embodiment, gray level image may not be needed to occupy the whole of PMOLED display panel
A screen.A part of screen can be exclusively used in gray level image to show, rest part is shown for monochrome image.It is assumed that not making
With additional display-memory, since gray level image pixel color depth (gray level) information needs certain memory space, because
This must retain a part of space in display-memory and give gray level image pixel color depth information.The display that this part retains
Memory space cannot be used for image and show, so there are non-display areas in PMOLED display panel.It is further assumed that PMOLED
The resolution ratio of display panel is M column × N row；If gray level image display uses K row therein, the generation of grayscale image is used
T time slot (T), then (K * (T -1)) row belongs to non-display area, and (N-(K * T)) row can be used for achromatic map
As display.
With reference to Figure 10.For storing the part retaining space of gray level image pixel color depth information in display-memory
The multiple portions of the multiple regions corresponding to selective distribution in entire PMOLED display panel can be separated into.Thus can
To allow viewer to feel to see PMOLED display panel that is complete while showing monochrome image and gray level image, rather than
The reason of becoming scaled down version PMOLED display panel because of non-display area, latter space is caused to reduce is display-memory
For storing the part retaining space of gray level image pixel color depth.
The present invention can also be used to improve gray level image display driver.Recall the principle of gray level image display driver
It is every data line SEG by indicating 2 in every scan linenThe 2 of a brightnessnThe driving of one of a drive signal waveform pattern.With figure
In the corresponding illustrative embodiments of 11a and 11b, original unimproved gray level image display driver has one 2 DAC,
Therefore four pixel grayscales of 0%, 33.3%, 66.6% and 100% brightness can be generated.Technology of the invention is applied to
The gray level image display driver, each scan line COM (j) are triggered in multiple time slots (T time slot) in each frame
(T=2 in this illustrative embodiments).It is more in each frame that this is now dependent on the possible gray level of the difference of pixel
A COM is triggered the summation of different SEG drive signal waveform patterns during time slot.To which the maximum number of gray level is equal to:
(Y -1) * T+1, wherein Y is producible original gradation series, and T is that scan line COM can be touched in every frame
The number of the time slot of hair.In the illustrative embodiments, Y is equal to 4, and T is equal to 2, therefore can be generated 0%, 33.3%,
Seven gray levels altogether of 66.6%, 100%, 133.3%, 166.6% and 200% brightness.
Referring to Figure 12 a and 12b.In another embodiment for applying the present invention to gray level image display driver, often
A scan line COM (j) is triggered in two time slots in every frame.One of time slot (odd number or even number) is exclusively used in allowing
Each data line SEG is by representing original unmodified gray level image display driver producible 2nThe 2 of a brightnessnA driving letter
The driving of one of number waveform patterns.Original producible number of greyscale levels is indicated with Y, possibility corresponding with these odd numbers or even timeslots
Pixel grayscale are as follows: * 100% brightness of 0%, 1/ (Y-1) * 100%, 2/ (Y-1) * 100% ..., (Y-1)/(Y-1).
Another time slot (even number or odd number) is exclusively used in allowing each data line SEG by having the duty ratio shortened or reduced electric current electricity
It is flat that (amplitude is divided by the 2 of factor Y)nThe driving of one of a drive signal waveform pattern.Original producible number of greyscale levels is indicated with Y,
Possible pixel grayscale corresponding with these odd numbers or even timeslots are as follows: 0%, 1/ (Y-1)/Y * 100%, 2/ (Y-1)/Y *
100% ..., (Y-1)/(Y-1)/Y *, 100% brightness.This makes the possible gray level of the difference of pixel be now dependent on each frame
The summation of different SEG drive signal waveform patterns during interior multiple COM triggering time slot, and the maximum number etc. of gray level
In: YT, wherein Y is producible original gradation series, and T is the time slot that scan line COM can be triggered in every frame
Number.In this illustrative embodiments, the original gradation series Y that can produce is equal to 4, and T is equal to 2, producible gray scale
The maximum number of grade is 16, is respectively as follows: 0%, 8.33%, 16.66%, 25%, 33.33% 41.66%, 50%, 58.33%,
66.66%, 75%, 83.33%, 91.66%, 100%, 108.33%, 116.66% and 125% brightness.
Although the embodiment of above-mentioned multiphase constant current topology is to be applied to OLED light source, those of ordinary skill in the art will
Understand, identical inventive concept can be applied to such as using in the application of LED light source.
Embodiments disclosed herein can be used general or specialized calculating equipment, computer processor or electronic circuit and come
It realizes, including but not limited to digital signal processor (DSP), specific integrated circuit (ASIC), field programmable gate array
(FPGA) and according to teachings of the present application other programmable logic device for configuring or programming.Based on teachings of the present application,
The those of ordinary skill of software or electronic field can be readily implemented in general or specialized calculating equipment, computer processor or
The computer instruction or software code run in programmable logic device.
In some embodiments, the present invention includes computer storage medium, wherein being stored with computer instruction or software
Code can be used for being programmed computer or microprocessor to execute any process of the invention.Storage medium include but
It is not limited to ROM, RAM, flash memory device or suitable for store instruction, any kind of medium of code and/or data or equipment.
The purpose that foregoing description of the invention is merely to illustrate and describes is not intended to exhaustion or limits the invention to institute
Disclosed precise forms.Many modifications and variations will be apparent those skilled in the art.
These embodiments are selected and described to best explain the principle of the present invention and its practical application, to make this
The others skilled in the art in field are it will be appreciated that various embodiments of the invention, and with being suitable for the various of expected special-purpose
Modification is to understand the present invention.The scope of the present invention is intended to by appended claims and its equivalent item to limit.
Claims (16)
1. a kind of method for carrying out gray level image in monochromatic display panel and showing signal driving characterized by comprising
Each scan line is triggered in the T time slot in each frame, wherein only triggering a scan line in any one time slot；
Pass through ON or OFF drive signal waveform Periodic signal drive each data line during each time slot in each frame,
Wherein all ON drive signal waveform period signal waveform duty ratios having the same and current amplitude；
Wherein, the brightness of pixel is by the time slot in the correspondence ON drive signal waveform period being connected on the data line of the pixel
Sum determine；And
Wherein, gray level image pixel grey level information is stored in display memory space, the gray level image pixel grey level information
The display memory space is shared together with image data.
2. the method according to claim 1, wherein original of the display memory space for monochromatic display panel
Beginning display resolution is fixed, so that display resolution reduction is deposited with providing the gray level image pixel grey level information
Storage, the gray level image pixel grey level information are stored in the display memory space as gray level image pixel grayscale letter
It ceases and in a part of space of reservation.
3. according to the method described in claim 2, it is characterized in that, the display memory space is the gray level image pixel ash
A part of space spending grade information and retaining is separated into corresponding to the multiple of the multiple regions being distributed on entire display panel
Part.
4. the method according to claim 1, wherein every scan line is in each frame in T continuous slot
It is triggered.
5. the method according to claim 1, wherein when every scan line is discrete T in each frame
It is triggered in gap.
6. a kind of method for carrying out gray level image in monochromatic display panel and showing signal driving characterized by comprising
Each scan line is triggered in the T time slot in each frame, wherein only triggering a scan line in any one time slot；
Pass through ON or OFF drive signal waveform Periodic signal drive each data line during each time slot in each frame,
Wherein the ON drive signal waveform period in different time-gap is changed in terms of signal waveform duty ratio or current amplitude by particular order
Become；
Wherein, the brightness of pixel is by the time slot in the correspondence ON drive signal waveform period being connected on the data line of the pixel
Sum determine；And
Wherein, gray level image pixel grey level information is stored in display memory space, the gray level image pixel grey level information
The display memory space is shared together with image data.
7. according to the method described in claim 6, it is characterized in that, described show memory space for the original of monochromatic display panel
Beginning display resolution is fixed, so that display resolution reduction is deposited with providing the gray level image pixel grey level information
Storage, the gray level image pixel grey level information are stored in the display memory space as gray level image pixel grayscale letter
It ceases and in a part of space of reservation.
8. the method according to the description of claim 7 is characterized in that the display memory space is the gray level image pixel ash
A part of space spending grade information and retaining is separated into corresponding to the multiple of the multiple regions being distributed on entire display panel
Part.
9. according to the method described in claim 6, it is characterized in that, every scan line is in each frame in T continuous slot
It is triggered.
10. according to the method described in claim 6, it is characterized in that, when every scan line is discrete T in each frame
It is triggered in gap.
11. a kind of method for carrying out gray level image in display panel and showing signal driving characterized by comprising
Each scan line is triggered in the T time slot in each frame, wherein a scan line is only triggered in any one time slot,
Wherein T is greater than 1；
Pass through driving each data line in Y different driving signal waveform during each time slot in each frame,
Wherein each of Y different driving signal waveform corresponds to a possible pixel grayscale；
Wherein, the brightness of pixel is during the scan line time slot being triggered by driving on the data line for being connected to the pixel
The summation of drive signal waveform driving determines.
12. according to the method for claim 11, which is characterized in that every scan line is in every frame in continuous T time slot
Triggering.
13. according to the method for claim 11, which is characterized in that every scan line discontinuous T time slot in every frame
Middle triggering.
14. a kind of method for carrying out gray level image in display panel and showing signal driving characterized by comprising
Each scan line is triggered in 2 time slots in each frame, wherein only triggering a scan line in any one time slot；
Pass through driving each data line in Y different driving signal waveform during the first time slot in each frame,
Wherein each of Y different driving signal waveform corresponds to a possible pixel grayscale；
By Y its amplitudes divided by one in the different driving signal waveform of factor Y during the second time slot in each frame
Drive each data line；
Wherein, the brightness of pixel is during the scan line time slot being triggered by driving on the data line for being connected to the pixel
The summation of drive signal waveform driving determines.
15. according to the method for claim 14, which is characterized in that every scan line is in every frame in continuous T time slot
Triggering.
16. according to the method for claim 14, which is characterized in that every scan line discontinuous T time slot in every frame
Middle triggering.
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