CN104575375B - Passive matrix organic light emitting diode display with function of balancing display brightness and driving method - Google Patents
Passive matrix organic light emitting diode display with function of balancing display brightness and driving method Download PDFInfo
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Abstract
A passive matrix organic light emitting diode display with balanced display brightness is suitable for continuously receiving a display signal, the display signal includes a plurality of frame picture information, each frame picture information including a plurality of display unit information, the display comprises a display unit matrix and a drive control device, wherein the display unit matrix comprises a plurality of scanning electrodes, a plurality of data electrodes and a plurality of display units, the driving control device is electrically connected with each scanning electrode and each data electrode, and judges the total number of display units which correspond to the same scanning electrode and are to be driven according to each frame of picture information, and adjusting the driving time length of the corresponding scanning electrode, the driving time length of the corresponding data electrode or the driving voltage difference of the corresponding display unit in a positive correlation mode so as to balance the brightness of the display unit corresponding to each scanning electrode in the display unit matrix.
Description
Technical field
A kind of passive matrix organic light emitting diode display, especially a kind of quilt with balanced display brightness function
Dynamic matrix organic LED display.
Background technology
Organic light emitting diode display compared to conventional planar display have wide viewing angle, response time fast, high brightness,
Many advantages, such as low operating voltage, self-luminous, already become and develop indispensable important display skill with future display now
Art.Organic Light Emitting Diode can be divided into active driving (active matrix, AM) according to the difference of type of drive and passive type drives
Two kinds of dynamic (passive matrix, PM), wherein passive type drive organic light emitting diode display have manufacturing cost it is cheap,
The many advantages such as yield height, therefore it is commonly consumer or industrial electronic product is adopted.
Fig. 7 is refer to, it is multiple with array arrangement that an existing passive type drives organic light emitting diode display 80 to include
Display unit 81, the corresponding identical one scan electrode of each display unit 81 (COM_1, COM_2 ... or COM_n) of each column,
Every correspondence identical one information electrode of each display unit 81 (SEG_1, SEG_2 ... or SEG_n) of row.During driving, one drives
Chip (not shown) drives one by one each scan electrode (COM_1, COM_2 ... or COM_n) and while coordinates each data electricity of input
Pole (SEG_1, SEG_2 ... an or SEG_n) data signal, makes each display unit 81 produce light output picture.
Fig. 8 is refer to, because each display unit 81 of traditional passive type driving organic light emitting diode display 80 can
The brightness of the light output of generation is relevant with size of current, in the passive type drives organic light emitting diode display 80, correspondence
When each display unit 81B of same scan electrode and one light output state of presentation is relatively more, because driving needed for same row
Dynamic display unit 81 is relatively more so that the electric current that each display unit 81 is obtained is relatively lower than the display unit that other are arranged
81A, and then it is uneven to produce shown picture brightness, and this brightness disproportionation phenomenon drives organic light emission two in the passive type
More there is the situation of notable deterioration during the increase resolution of pole pipe display 80.
The content of the invention
Show single because each scan electrode is corresponding to solve existing passive matrix organic light emitting diode display
When the quantity of first light output of generation simultaneously is relatively large, easily causes luminance-reduction and cause asking for display picture brightness irregularities
Topic, the present invention proposes that a kind of can be simultaneously the quantity of light output state according to the corresponding each display unit of each scan electrode,
The voltage difference of allotment scan electrode, the driving time length of data electrode or the scan electrode and data electrode, makes correspondence same
Scan line and produce the relatively large each display unit of quantity of light output there is relatively long display time or required electricity
Pressure reduction, the problem so as to making up brightness disproportionation reaches the technique effect that equilibrium brightness shows.
The present invention is a kind of passive-matrix organic light emitting diode display with balanced display brightness function, it is adaptable to
Continuous to receive a display signal, the display signal includes multiple frame image informations, and each frame image information includes multiple displays
Unit information, the display includes：One matrix of display elements, including multi-strip scanning electrode, a plurality of data electrode and multiple displays
Unit, each display unit corresponds to respectively a scan electrode and a data electrode, and each display unit information correspondence is shown in
Each display unit；And a drive dynamic control device, it is electrically connected with each scan electrode and each data electrode, and according to each frame picture
Information judge the same scan electrode of correspondence and will powered display unit sum, corresponding scanning is adjusted in positive correlation mode
The driving time length of electrode and the driving time length of corresponding data electrode, or adjust corresponding aobvious in positive correlation mode
Show that unit receives the voltage difference between the scan electrode and the data electrode, with correspondence in the balanced matrix of display elements
The brightness of the display unit of each scan electrode.
Wherein, the drive dynamic control device judges the same scan electrode of correspondence and will be driven according to each frame image information
Display unit sum, with driving time length and corresponding data electrode that a lookup table mode adjusts corresponding scan electrode
Driving time length.
Wherein, the drive dynamic control device includes a power subsystem, a data storage memory, a period of time being electrically connected with mutually
Between compensating unit, a time control unit, one scan drive component and a data-driven component, the power subsystem provides the driving
Electric power needed for control device；The data storage memory stores the display signal and comparison list；The time bias unit according to
According to each frame image information judge the same scan electrode of correspondence and will powered display unit sum, with reference to control voting
The driving time length of fixed corresponding scan electrode and the driving time length of corresponding data electrode, and export to the time
Control unit；The time control unit is swept according to the display signal and the driving time length, one activation bit of output to this
Retouch drive component and the data-driven component；The turntable driving component and the data-driven component respectively with each scan electrode and each
Data electrode is electrically connected with, and drives the matrix of display elements.
Wherein, when the drive dynamic control device is equal to a radix with the driving time length that a method defines each scan electrode
Between be multiplied by a weight coefficient corresponding to the scan electrode.
Wherein, when the drive dynamic control device is equal to a radix with the driving time length that a method defines each scan electrode
Between be multiplied by a weight coefficient corresponding to the scan electrode again divided by the sum total of whole weight coefficients.
Wherein, the time bias unit includes the add circuit array sequentially contacted and a comparison circuit array, should add
Method circuit array receives the display unit information of the same scan electrode of correspondence, and the time bias unit is according to the comparison circuit array
Output, and the driving time length of corresponding scan electrode and the driving of corresponding data electrode are determined with reference to the synopsis
Time span.
Wherein, there should be the passive-matrix organic light emitting diode display of balanced display brightness function, according to each frame
Image information judges that the same scan electrode of correspondence, by powered display unit sum, with a lookup table mode corresponding scanning is adjusted
The driving voltage of the driving voltage of electrode or corresponding data electrode.
The present invention provides a kind of passive-matrix organic luminuous dipolar object display with balanced display brightness function again
Display packing, its step includes：Captured a display signal and stored by outside, the display signal includes that multiple frame pictures are believed
Breath, each frame image information includes multiple display unit informations；Each frame image information is analyzed, and calculates correspondence with one scan electricity
Pole and will powered display unit sum；When determining the driving of corresponding scan electrode in positive correlation mode according to the sum
Between length and corresponding data electrode driving time length or the voltage difference size of the correspondence display unit；And according to institute
State driving time length or voltage difference size exports an activation bit, with the overall brightness of the balanced display.
Wherein, should have balanced display brightness function passive-matrix organic light emitting diode display display packing according to
The driving time length of corresponding scan electrode and the drive of corresponding data electrode are determined in the way of one tables look-up according to the sum
Dynamic time span.
Wherein, the activation bit correspondence shows that a display cycle of a frame image information is non-definite value.
Understand that beneficial effects of the present invention are based on preceding description：
1. the driving time length for scanning drive cycle Von of each display unit is changed, and compensation is because drive phase simultaneously
To the luminance difference problem produced by more display unit, overall display effect is thus significantly lifted.
2. the time of required consuming when calculating can be greatly reduced using lookup table mode, thus the reaction speed of display is lifted
Degree, the effects such as reaching simplified calculation process and reduce manufacturing cost.
3. the display cycle can be non-definite value or definite value, make control mode more polynary and suitable for the display of various resolution
Device.
4. correspondence voltage difference can be adjusted according to the quantity of display unit, make driving voltage size with different display units
Quantity and change, and then reach technology effect that equilbrium brightness shows.
Description of the drawings
Fig. 1 is present pre-ferred embodiments and its correspondence signal graph；
Fig. 2 is the system block diagrams of present pre-ferred embodiments；
Fig. 3 is the drive signal and display brightness corresponding diagram of present pre-ferred embodiments；Fig. 4 is
The frame picture data display cycle schematic diagram of present pre-ferred embodiments；
Fig. 5 is the circuit diagram of a time compensating unit of present pre-ferred embodiments；
Fig. 6 is the driving method schematic diagram of present pre-ferred embodiments；
Fig. 6 a are the driving schematic diagram of second embodiment of the invention；
Fig. 6 b are the driving schematic diagram of third embodiment of the invention；
Fig. 7 is existing passive matrix organic light emitting diode display and its to induction signal；
Fig. 8 is that the driving of existing passive matrix organic light emitting diode display shows result.
Description of reference numerals：
10 matrix of display elements
11 display units
20 drive dynamic control devices
21 power subsystems
22 data storage memories
23 synopsis
24 time bias units
25 time control units
26 turntable driving components
27 data-driven components
Specific embodiment
As shown in Fig. 1,2 and 3, it is a kind of passive-matrix organic light emission two with balanced display brightness function of the present invention
Pole pipe display, including a matrix of display elements 10 and a drive dynamic control device 20.The matrix of display elements 10 includes a plurality of sweeping
Retouch electrode (COM) and a plurality of data electrode (SEG) and multiple display units 11.Each scan electrode is interlaced with each data electrode
And be spaced up and down.Each display unit 11 is correspondingly formed in the intervening portion of each scan electrode and each data electrode, and in right
Light output is produced when enough potential differences are formed between the scan electrode answered and data electrode.The drive dynamic control device 20 is somebody's turn to do with respectively
Scan electrode and respectively data electrode electric connection.
Outside the continuous reception of the drive dynamic control device 20 one shows signal and is kept in that the display signal includes many
Individual frame image information (frame 1, frame 2 ...), each frame image information includes multiple display unit informations (pixel), respectively
Display unit information correspondence is shown in each display unit 11.The drive dynamic control device 20 according to every frame image information content one by one
Input scan signal (COM_1~COM_m) is to each scan electrode, and one data signal of input (SEG_1~SEG_n) is to each
Data electrode, makes to produce enough current potentials between the corresponding scan electrode of each display unit 11 to be driven and data electrode
Difference, and then make each display unit 11 produce light output picture corresponding with the frame image information.
In a display cycle frame 1 (please correspond to and refer to Fig. 1) of each frame image information, include per scan signal
One scans drive cycle VonAnd a non-driven cycle Voff.This scans drive cycle VonTime span be corresponding each aobvious
Show that unit 11 can produce the time span of light output according to the voltage status of the scanning signal.This scans drive cycle VonWhen
Between length adjustment mode be：The drive dynamic control device 20 is first calculated in each frame image information, interior during each display cycle
Light output state to be presented and the respectively sum of each display unit 11 of corresponding each scan electrode, then according to the sum with positive correlation side
Formula adjusts the time span that this scans drive cycle.Aforementioned this scans drive cycle VonTime span adjustment mode can be via Jing
Test with after visual experience test, select optimal positive correlation mode or lookup table mode to determine that this scans drive cycle VonProlongation
Time.In practice, experience and the result of visual experience test can be formed a form with the corresponding relation of voltage, be utilized during driving
Table look-up and find out optimal combinations of voltages, perform aforesaid driving.
Illustrate wherein in a frame image information, there is the display unit 11A of the same scan electrode of 5 correspondences by example of Fig. 3
Light output state to be presented, the scanning signal is caused after the premenstrual adjustment stated scans drive cycle VonTime increases, and then makes
The display unit 11A visually produces the compensation of brightness because the display time increases, i.e. thus the lifting of brightness reaches
Technology effect of uniform luminance.
It should be noted that as this scans drive cycle VonProlongation, correct show result, the data to reach
Signal must also coordinate this to scan drive cycle VonProlongation and correspondence extend input time.As shown in figure 1, corresponding scanning signal
Drive cycle V is scanned positioned at thisonAnd corresponding data signal is located at a data-driven cycle Vhigh, and then make what is driven to show
Show that unit 11 produces correct display result.
Further, please coordinate with reference to Fig. 6 a, 6b, in addition to the time by the aforementioned prolongation turntable driving cycle, be
Aforementioned techniques effect of the present invention is reached, also can pass through to adjust scanning signal COM and/or the voltage quasi position of data signal SEG
Reach technology effect of display brightness matching balance.It is relatively how described when having in the same turntable driving cycle in Fig. 6 a
When display unit 11A is driven, by the pressure reduction of corresponding data signal SEG of adjustment, make in auspicious display picture, together
One scanning signal COM display unit 11A for needing to show relatively can have relatively large voltage difference more, to compensate
Aforementioned luminance shortage/unbalanced problem, thus, during the same frame picture drives, this of correspondence same turntable driving cycle shows
Show unit 11B, there is relatively small number of display unit quantity compared to the display unit 11A, it is single in order to balance the display
The problem of the possible luminance shortages of first 11A, can pass through the data drive signal voltage Vs for reducing the data signal, reach institute of the present invention
The balance display effect for needing.With the explanation of actual example, please coordinate with reference to Fig. 6 a, drive the relatively how described display unit of correspondence
During 11A, can be by drawing high the voltage quasi position of corresponding data signal SEG for example to 4 volts (V), when to the drive of next display cycle
When moving relatively small number of display unit 11B, corresponding data signal SEG is then reduced to relatively low voltage (i.e. Vs) such as 2.5V, thus,
Can reach the technique effect that balance shows.Or, as shown in Figure 6 b, need to show when same scanning signal COM correspondences relatively more
During the display unit 11A for showing, it is possible to decrease the voltage Vc in the turntable driving cycle, so as to reaching institute relatively large number of in display
State display unit 11A and produce relatively large voltage difference, and reach the effect that balance shows.With the explanation of actual example, work as driving
During the relatively large number of display unit 11A, the described aobvious of correspondence driving can be made by reducing the voltage of scanning signal COM
Show the voltage difference increase of unit 11A, the voltage difference for for example driving relatively how described display unit 11A is 4V, is shown relatively
The voltage difference of few display unit 11B is 2.5V, and effect of compensation display effect is reached whereby.
Driving voltage VcWith data drive signal voltage VsPreferred values can be by empirical equation or data calculation side
Formula is obtained, and for example, can give the drive dynamic control device 20 by the synopsis of a built-in display unit quantity and voltage, is made
The same frame picture shows process, and correspondence is increased voltage difference when showing the relatively display unit 11A, and is being shown
The cycle of relatively fewer display unit 11B reduces voltage difference, reaches the effect of display brightness balance.In other words, the present invention is logical
The technical approach of time bias (adjustment drive cycle) or voltage compensation (adjustment driving voltage is poor) is crossed, aforementioned luminance balance is reached
Effect.In terms of enforcement, can be by the replacement of a voltage control unit 25 time bias unit 24 and the time control list
Unit 25, the voltage control unit 25 obtains corresponding voltage value needed for the quantity for driving display unit 11 according to the synopsis 23
Afterwards, the output voltage of the data-driven component 27 and the turntable driving component 26 is driven.In other words, the data-driven component 27 with
The turntable driving component 26 can provide the driving element of multi-level.
Please coordinate and refer to Fig. 4, with turntable driving cycle VonChange because driving the display unit 11 of varying number, this
Display cycle (the t of each frame image information of inventionframe) can be definite value or non-definite value.Wherein, the drive dynamic control device 20 is calculated
The display cycle (tframe) method can be for example following two kinds.First method defines this of each scan electrode and scans driving week
Phase VonDriving time length (t1~tn) it is equal to default radix time (Tbase) power that is multiplied by corresponding to the scan electrode
Weight coefficient (ω1~ωn), it is as follows：
t1=Tbase*ω1
t2=Tbase*ω2
t3=Tbase*ω3
tn=Tbase*ωn
Second method defines the driving time length (t of each scan electrode1~tn) it is equal to the radix time (Tbase) take advantage of
A weight coefficient (ω corresponding to the upper scan electrode1~ωn) again divided by the sum total of whole weight coefficients, it is as follows：
t1=Tbase*ω1/∑ω
t2=Tbase*ω2/∑ω
t3=Tbase*ω3/∑ω
tn=Tbase*ωn/∑ω
The weight coefficient (ω1~ωn) calculation system judge the same scan electrode of correspondence according to each frame image information
And will the sum of powered display unit 11 calculate and obtain.With regard to the radix time (Tbase) setting, can foundation
The response time of circuit, the sum of the display unit 11, the response time of the drive component for being used, empirical equation and vision
The factors such as impression are applicable to whereby the display of different resolution and size determining.
The drive dynamic control device 20 of the present embodiment includes a power subsystem 21, the data storage storage being electrically connected with each other
Device 22, a time compensating unit 24, a time control unit 25, the data-driven component 27 of one scan drive component 26 and, and
Comparison list 23 is stored in the data storage memory 22.
The power subsystem 21 provides the electric power needed for the drive dynamic control device 20, and its species kenel is not limited, and can be multigroup
DC-DC (DC/DC) change-over circuit, for providing the drive dynamic control device 20 in each circuit unit or module it is similar and different
The electric power of voltage requirements, for example, provide 3.3V and the 5V for making the circuit inside the drive dynamic control device 20 work.In the present embodiment
In, the power subsystem 21 includes an AC for being used to supply electrical power to the time bias unit 24120VTurn DC5VChange-over circuit,
And an AC for being used to supply electrical power to the turntable driving component 26 and the data-driven component 27120VTurn DC8VChange-over circuit.
Because aforesaid various change-over circuits are circuit unit common in this technical field, therefore its detailed aspects is repeated no more in this
Sample.
The data storage memory 22 receives the display signal, drives the information such as desired parameters and temporarily store up by outside
Deposit, its species kenel is not limited, such as flash memory (Flash memory), static RAM (SRAM) or dynamic random
Access memorizer (DRAM).In the present embodiment, the data storage memory 22 is a flash memory.Because aforesaid various memorizeies it is equal
For circuit unit common in this technical field, therefore its detailed aspects is repeated no more in this.
The synopsis 23 is that record " when the display unit 11 of varying number is driven, to this drive cycle V is scannedonDrive
Dynamic time span (t1~tn) time for being extended " and relation, therefore the synopsis 23 provided before the drive dynamic control device 20 calculates
The most fast method of the driving time length stated, not only can be greatly decreased the computational burden of hardware, can also accelerate response speed, subtract
Few display delay problem produced because calculating speed is too slow.The synopsis 23 may include " to drive the quantity of the display unit 11
Drive cycle V is scanned with thisonDriving time length (t1~tn) " relation, and the relation can be according to the display list for being used
Material category, visual response time, resolution of the matrix of display elements 10 of unit 11 etc. are adjusted, and make different display lists
Variable matrix 10 and the display unit 11 can reach optimal display effect (showing response speed, uniform display brightness etc.).
The time bias unit 24 by be recorded in the synopsis 23 " quantity for driving the display unit 11 is scanned with this
Drive cycle VonDriving time length (t1~tn) " relation determines that this scans drive cycle VonWith data-driven cycle Vhigh
Time span.In the present embodiment, the time bias unit 24 is circuit as shown in Figure 5, and it is an add circuit array
242 one comparison circuit arrays 244 of concatenation, one input data is the display unit information of the same scan electrode of correspondence, this example
The bit width of middle display unit information is 10bits, and the input data is input into the input data of the add circuit array 242.
One output (T of the comparison circuit array 2441、T2Or T3) it is that frame image information corresponding string scan electrode scans drive
Dynamic cycle VonTime span option.If 7 display units more than 11, T need to be driven1For 1, T2、T3For 0, it represents certain string
The time of the drive cycle of display unit 11 is T1.If certain string need to be driven between 6 to 4 display units 11, T2For 1, T1、
T3For 0, the time of drive cycle of this particular column is represented as T2.If another row need to be driven less than 3 display units 11, T3For
1, T1、T2For 0, the time of drive cycle of the row is represented as T3.The time bias unit 24 is according further to the comparison circuit number
Output (the T of group 2441、T2Or T3) determine that this scans drive cycle V with lookup table modeonDriving time length and the data-driven
Cycle VhighTime span.
The turntable driving component 26 electrically connects respectively with each scan electrode with the data-driven component 27 with each data electrode
Connect, and export the scanning signal and the data signal respectively to each scan electrode and each data electrode, to provide each display unit
11 produce the appropriate signal of telecommunication required during light output.In the present embodiment, the turntable driving component 26 and the data-driven component
27 is the drive circuit being made up of a booster circuit and a Buffer Unit.Because the booster circuit and the Buffer Unit are this
Common circuit unit in technical field, therefore repeat no more its detailed aspects in this.
Frame image information is stored in the data storage memory 22 by the time control unit 25, according to " the display signal,
This scans drive cycle VonDriving time length (t1~tn) and data-driven cycle VhighDriving time length " output
One activation bit makes the turntable driving component 26 and the data-driven to the turntable driving component 26 and the data-driven component 27
Component 27 adjusts the light output time of each display unit 11, and makes the matrix of display elements 10 perform display work.
Fig. 6 is refer to, the drive dynamic control device 20 can perform the driving method of a balanced display brightness, should for foundation
The content for showing signal adjusts the driving time length of the scanning signal and the data signal, and the driving method includes following step
Suddenly：
1. captured a display signal and stored by outside, the display signal includes multiple frame image informations, each frame
Image information includes multiple display unit informations；
2. analyze each frame image information, and calculate the same scan electrode of correspondence and will powered display unit it is total
Number；
3. when determining the driving of corresponding scan electrode in positively related mode (look-up table) according to the display unit sum
Between length and corresponding data electrode driving time length；
4. an activation bit is exported according to the driving time length, with the overall brightness of the balanced display.Wherein, should
Activation bit correspondence shows that a display cycle of a frame image information is non-definite value.
Understand that the present embodiment possesses following features based on preceding description：
1. change each display unit scans drive cycle VonDriving time length, compensation is because drive relative simultaneously
Luminance difference problem produced by more display unit, significantly lifts whereby overall display effect.
2. the time of required consuming when calculating can be greatly reduced using lookup table mode, the reaction speed of display is lifted whereby
Degree, the effects such as reaching simplified calculation process and reduce manufacturing cost.
3. the display cycle can be non-definite value or definite value, make control mode more polynary and suitable for the display of various resolution
Device.
4. correspondence voltage difference can be adjusted according to the quantity of display unit, make driving voltage size with different display units
Quantity and change, and then reach technology effect that equilbrium brightness shows.
The technology contents and technical characterstic of the present invention have revealed that as above, but one skilled in the art scholar is still potentially based on
Disclosure of the invention and make various replacements and modification without departing substantially from this case spirit；Therefore, protection scope of the present invention should not
It is limited to person disclosed in embodiment, and various replacements and modification without departing substantially from the present invention should be included, and model is applied for a patent for following
Enclose and covered.
Claims (5)
1. a kind of passive-matrix organic light emitting diode display with balanced display brightness function, it is characterised in that described
Display is applied to continuous reception one and shows signal, and the display signal includes multiple frame image informations, each frame image information
Including multiple display unit informations, the display includes：
One matrix of display elements, including multi-strip scanning electrode, a plurality of data electrode and multiple display units, each display unit point
Not Dui Ying a scan electrode and a data electrode, each display unit information correspondence is shown in each display unit；And
One drive dynamic control device, is electrically connected with each scan electrode with corresponding data electrode, and believes according to each frame picture
Breath judge the same scan electrode of correspondence and will powered display unit sum, adjusted in positive correlation mode and corresponding show single
Unit receives the voltage difference between the scan electrode and the data electrode, is respectively swept with correspondence in the balanced matrix of display elements
Retouch the brightness of the display unit of electrode.
2. the passive-matrix organic light emitting diode display with balanced display brightness function according to claim 1,
Characterized in that, the drive dynamic control device includes a power subsystem, a data storage memory, the voltage being electrically connected with mutually
Control unit, one scan drive component and a data-driven component, wherein,
The power subsystem provides the electric power needed for the drive dynamic control device；The data storage memory stores the display signal and
The synopsis of display unit quantity and voltage；The voltage control unit obtains the quantity institute for driving display unit according to the synopsis
After needing corresponding voltage value, the output voltage of the data-driven component and the turntable driving component is driven；And
The turntable driving component and the data-driven component are electrically connected with respectively with each scan electrode and each data electrode, and drive
The matrix of display elements.
3. the passive-matrix organic light emitting diode display with balanced display brightness function according to claim 1,
The same scan electrode of correspondence is judged by powered display unit sum, according to each frame image information with lookup table mode adjustment
The driving voltage of the driving voltage of corresponding scan electrode or corresponding data electrode.
4. a kind of display packing of the passive-matrix organic light emitting diode display with balanced display brightness function, its feature
It is to comprise the steps：
Captured a display signal and stored by outside, the display signal includes multiple frame image informations, each frame picture letter
Breath includes multiple display unit informations；
Analyze each frame image information, and calculate the same scan electrode of correspondence and will powered display unit sum；
The voltage of corresponding scan electrode and corresponding data electrode is determined in positive correlation mode according to the display unit sum
Difference size；And
According to the overall brightness of the voltage difference size equalization display.
5. the passive-matrix organic light emitting diode display with balanced display brightness function according to claim 4
Display packing, it is characterised in that the synopsis of a built-in display unit quantity and voltage difference, according to display unit sum with one
The mode tabled look-up determines the voltage difference size between corresponding scan electrode and corresponding data electrode.
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| CN109671392B (en) * | 2019-02-27 | 2021-11-19 | Oppo广东移动通信有限公司 | Brightness compensation method, display and computer storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6191535B1 (en) * | 1998-11-27 | 2001-02-20 | Sanyo Electric Co., Ltd. | Electroluminescence display apparatus |
| US20020018060A1 (en) * | 2000-08-10 | 2002-02-14 | Shunpei Yamazaki | Display device and electronic device |
| CN1571011A (en) * | 2003-11-21 | 2005-01-26 | 友达光电股份有限公司 | Method for displaying image on optical display device with discrepancy brightness attenuation pixel |
| US20060022964A1 (en) * | 2004-07-28 | 2006-02-02 | Kim Chang O | Removing crosstalk in an organic light-emitting diode display by adjusting display scan periods |
| TW200713189A (en) * | 2005-09-07 | 2007-04-01 | Chunghwa Picture Tubes Ltd | Driving method which drives display units of different frequency spectra with respective sweep signals and apparatus based on the same |
-
2014
- 2014-10-13 TW TW103135312A patent/TWI549109B/en not_active IP Right Cessation
- 2014-10-14 CN CN201410542188.2A patent/CN104575375B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6191535B1 (en) * | 1998-11-27 | 2001-02-20 | Sanyo Electric Co., Ltd. | Electroluminescence display apparatus |
| US20020018060A1 (en) * | 2000-08-10 | 2002-02-14 | Shunpei Yamazaki | Display device and electronic device |
| CN1571011A (en) * | 2003-11-21 | 2005-01-26 | 友达光电股份有限公司 | Method for displaying image on optical display device with discrepancy brightness attenuation pixel |
| US20060022964A1 (en) * | 2004-07-28 | 2006-02-02 | Kim Chang O | Removing crosstalk in an organic light-emitting diode display by adjusting display scan periods |
| TW200713189A (en) * | 2005-09-07 | 2007-04-01 | Chunghwa Picture Tubes Ltd | Driving method which drives display units of different frequency spectra with respective sweep signals and apparatus based on the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104575375A (en) | 2015-04-29 |
| TW201517000A (en) | 2015-05-01 |
| TWI549109B (en) | 2016-09-11 |
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