CN103927973B - A kind of display floater and its image element driving method - Google Patents
A kind of display floater and its image element driving method Download PDFInfo
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- CN103927973B CN103927973B CN201310727956.7A CN201310727956A CN103927973B CN 103927973 B CN103927973 B CN 103927973B CN 201310727956 A CN201310727956 A CN 201310727956A CN 103927973 B CN103927973 B CN 103927973B
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Abstract
The invention provides a kind of display floater and its image element driving method, including：Multiple pixel cells, the pixel cell include red pixel area, green pixel area, the first blue pixel area and the second blue pixel area；Pixel-driving circuit, including signal control circuit and emission control circuit.After there is decay in the brightness of the pixel cell being made up of the first blue pixel area, can pass through to turn on the second controlling switch, the second blue pixel area is made to replace the work of the first blue pixel area, after there is decay in the brightness of the pixel cell being made up of the second blue pixel area, can pass through to turn on the first controlling switch, the first blue pixel area is made to replace the work of the second blue pixel area, or the first blue pixel area and the second blue pixel area is made while work, to extend working time and the service life of pixel cell, and then extend the service life of display floater.
Description
Technical field
The present invention relates to display technology field, more particularly, it relates to a kind of display floater and its image element driving method.
Background technology
OLED（Organic light-emitting diode, organic electroluminescence device）It is that one kind can be straight by electric energy
Switch through the solid semiconductor device for changing luminous energy into, because which has the advantages that frivolous, high-contrast, quick response and wide viewing angle, and
It is widely used in the display floater of a new generation.And the difference according to type of drive, OLED is divided into AMOLED again（Active-
Matrix organic light-emitting diode, active matrix organic electroluminescence device）And PMOLED
（Passive-matrix organic light-emitting diode, passive cross-location）.
Existing AMOLED display floaters, as shown in figure 1, including the pixel cell of multiple matrix arrangements, the pixel list
Unit includes red pixel area, green pixel area and the blue pixel area being arranged in order in the first direction, wherein, pixel-driving circuit
As shown in Fig. 2 including：Signal control circuit and negative pole with the light emitting diode that electrically connects, the signal control circuit is as empty
Shown in line part, including：Grid is electrically connected with scan line input T1, and the p-type electrically connected with data wire input T2 that drains is thin
Film transistor M3；One end is electrically connected with the source electrode of P-type TFT M3, the electric capacity that the other end is electrically connected with power line input
C1；Drain electrode is electrically connected with power line input T3, and the power supply line traffic control that grid is electrically connected with the source electrode of P-type TFT M3 is opened
Close, i.e. N-type TFT M4, wherein, the source electrode of N-type TFT M4 and described luminous two in the signal control circuit
The positive pole electrical connection of pole pipe.
Due to red pixel area, green pixel area different with the corresponding light LED material in blue pixel area, therefore, red
The service life in color pixel area, green pixel area and blue pixel area is also different.Light-emitting diodes due to blue pixel area
Tube material service life is most short, only 1/3rd of red pixel area and green pixel area, therefore, sending out in blue pixel area
Under the restriction in optical diode materials'use life-span, the service life of display floater is also greatly shortened.
Content of the invention
In view of this, the invention provides a kind of display floater and its image element driving method, to improve making for display floater
Use the life-span.
For achieving the above object, the present invention provides following technical scheme：
A kind of display floater, including：Multiple pixel cells, the pixel cell include red pixel area, green pixel area,
First blue pixel area and the second blue pixel area；Pixel-driving circuit, including signal control circuit and emission control circuit, institute
Stating emission control circuit includes：The first controlling switch electrically connected with the power supply line control switch of the signal control circuit and
Two controlling switches；The control end electrically connected with first controlling switch and the second controlling switch；Negative pole with electrically connect, positive pole
The first light emitting diode electrically connected with first controlling switch；Negative pole with electrically connect, positive pole with described second control open
Second light emitting diode of powered-down connection；Wherein, the pixel-driving circuit passes through after decay occurs in the brightness of pixel cell
Being turned on or off for first controlling switch is controlled, makes the first blue pixel area in running order or the shape that do not work
State, is turned on or off by controlling second controlling switch, makes the second blue pixel area in running order or not
Working condition.
A kind of image element driving method of display floater as above, including：The first controlling switch is turned on, and disconnects second
Controlling switch, makes the first blue pixel area in running order, and the second blue pixel area is in off position；Judge by first
Whether the brightness of the pixel cell that blue pixel area is constituted occurs decaying；When the pixel cell being made up of the first blue pixel area
After decay occurs in brightness, first controlling switch is disconnected, and turns on second controlling switch, make second blue pixel
Area is in running order, makes the first blue pixel area be in off position.
Compared with prior art, technical scheme provided by the present invention has advantages below：
Display floater provided by the present invention and its image element driving method, when the pixel list being made up of the first blue pixel area
After decay occurs in the brightness of unit, can pass through to turn on the second controlling switch, make the second blue pixel area replace the first blue pixel
Area works, and after decay occurs in the brightness of the pixel cell being made up of the second blue pixel area, can pass through conducting first and control
Switch, makes the first blue pixel area replace the work of the second blue pixel area, or makes the first blue pixel area and the second blue pixel
Area works simultaneously, extends working time and the service life of pixel cell, and then extends the service life of display floater.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is pixel cell structure schematic diagram of the prior art；
Fig. 2 is the circuit diagram of pixel-driving circuit of the prior art；
The pixel cell structure schematic diagram that Fig. 3 is provided for one embodiment of the invention；
The circuit diagram of the pixel-driving circuit that Fig. 4 is provided for one embodiment of the invention；
The flow chart of the image element driving method that Fig. 5 is provided for another embodiment of the present invention；
The circuit diagram of the pixel-driving circuit that Fig. 6 is provided for another embodiment of the present invention；
The flow chart of the image element driving method that Fig. 7 is provided for another embodiment of the present invention.
Specific embodiment
As described in background, due to display panel pixel unit in red pixel area, green pixel area and blueness
The luminescent material of pixel region is different, and therefore, the service life in red pixel area, green pixel area and blue pixel area is not yet
With wherein, the service life in blue pixel area is most short.Under the restriction of the service life in blue pixel area, display floater makes
Also greatly shortened with the life-span.
This is based on, the invention provides a kind of display floater, to overcome the problems referred to above of prior art presence, including：
Multiple pixel cells, the pixel cell include red pixel area, green pixel area, the first blue pixel area and
Two blue pixel areas；
Pixel-driving circuit, including signal control circuit and emission control circuit, the emission control circuit includes：
The first controlling switch electrically connected with the power supply line control switch of the signal control circuit and the second controlling switch；
The control end electrically connected with first controlling switch and the second controlling switch；
Negative pole with electrically connect, the first light emitting diode that positive pole is electrically connected with first controlling switch；
Negative pole with electrically connect, the second light emitting diode that positive pole is electrically connected with second controlling switch；
Wherein, the pixel-driving circuit is controlled by controlling described first after decay occurs in the brightness of pixel cell
Being turned on or off for switch, makes the first blue pixel area in running order or off position, by controlling described the
Being turned on or off for two controlling switches, makes the second blue pixel area in running order or off position.
Present invention also offers a kind of image element driving method, is applied to display floater as above, including：
The first controlling switch is turned on, and disconnects the second controlling switch, make the first blue pixel area in running order, second
Blue pixel area is in off position；
After decay occurs in the brightness of the pixel cell being made up of the first blue pixel area, disconnect first control and open
Close, and turn on second controlling switch, make the second blue pixel area in running order, make first blue pixel
Area is in off position.
Display floater provided by the present invention and its image element driving method, when the pixel list being made up of the first blue pixel area
After decay occurs in the brightness of unit, can pass through to turn on the second controlling switch, make the second blue pixel area replace the first blue pixel
Area works, and after decay occurs in the brightness of the pixel cell being made up of the second blue pixel area, can pass through conducting first and control
Switch, makes the first blue pixel area replace the work of the second blue pixel area, or makes the first blue pixel area and the second blue pixel
Area works simultaneously, extends working time and the service life of pixel cell, and then extends the service life of display floater.
It is more than the core concept of the present invention, for enabling the above objects, features and advantages of the present invention to become apparent from easily
Understand, below in conjunction with the accompanying drawings the specific embodiment of the present invention is described in detail.
A lot of details are elaborated in the following description in order to fully understand the present invention, but the present invention can be with
Alternate manner described here is different from using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention do not limited by following public specific embodiment.
Secondly, the present invention is described in detail with reference to schematic diagram, when the embodiment of the present invention is described in detail, for purposes of illustration only, table
Show that the profile of device architecture can be disobeyed general ratio and be made partial enlargement, and the schematic diagram is example, its here should not
Limit the scope of protection of the invention.Additionally, the three-dimensional space of length, width and depth should be included in actual fabrication.
It is described in detail below by several embodiments.
A kind of display floater is present embodiments provided, including multiple pixel cells and the pixel driver of the pixel cell
Circuit.
The structural representation of the pixel cell is as shown in figure 3, each pixel cell includes red pixel area R, green
Pixel region G, the first blue pixel area B1 (alternatively referred to as the first sub-pixel area) and the second blue pixel area B2 (alternatively referred to as second
Sub-pixel area).The circuit diagram of the pixel-driving circuit is as shown in figure 4, including signal control circuit and emission control circuit.
The signal control circuit, as shown in dotted portion in Fig. 4, including：Grid is electrically connected with scan line input T1,
P-type TFT M3 that drain electrode is electrically connected with data wire input T2；One end is electrically connected with the source electrode of P-type TFT M3
Connect, the electric capacity C1 that the other end is electrically connected with power line input；Drain electrode is electrically connected with power line input T3, and grid is thin with p-type
The power supply line control switch of the source electrode electrical connection of film transistor M3, i.e. N-type TFT M4.Certainly, in other embodiments,
The signal control circuit of other structures can also be adopted, the present invention is not limited to this.
The emission control circuit includes：With the power supply line control switch of the signal control circuit, i.e. transistor M4, electricity
First controlling switch M10 and the second controlling switch M20 of connection；With first controlling switch M10 and the second controlling switch M20
Control end T4 of electrical connection；Negative pole with electrically connect, the first light-emitting diodes that positive pole is electrically connected with first controlling switch M10
Pipe B10；Negative pole with electrically connect, the second light emitting diode B20 that positive pole is electrically connected with second controlling switch M20.
As the effect of light emitting diode is to provide backlight for pixel region, therefore, when controlling switch is turned on, light-emitting diodes
When pipe is luminous, pixel region is in running order；When controlling switch disconnects, and light emitting diode does not light, pixel region is in and does not send out
Light state.It follows that the pixel-driving circuit in the present embodiment can lead on-off by the first controlling switch M10 of control
Open, make the first blue pixel area B10 in running order or off position, by controlling the conducting of the second controlling switch M20
Or disconnect, make the second blue pixel area B2 in running order or off position.
In the present embodiment, the first controlling switch M10 is first film transistor, and the second controlling switch M20 is the second film
Transistor, specifically, the first film transistor is N-type TFT, and second thin film transistor (TFT) is that p-type film is brilliant
Body pipe, and the first end of the first film transistor is drain electrode, the second end is grid, and the 3rd end is source electrode；Described second is thin
The first end of film transistor is source electrode, and the second end is grid, and the 3rd end is drain electrode.Now, as shown in figure 4, the first film crystal
The source electrode of the drain electrode of pipe and the second thin film transistor (TFT) is all electrically connected with the source electrode of the transistor M4 of signal control circuit, the first film
The grid of the grid of transistor and the second thin film transistor (TFT) is all electrically connected with control end T4, the source electrode of first film transistor and
The positive pole electrical connection of one light emitting diode B10, the drain electrode of the second thin film transistor (TFT) are electrically connected with the positive pole of the second light emitting diode B20
Connect.
During pixel cell initialization in display floater, by control end T4 input high level pulse signal, first is thin
Film transistor is turned on, and the second thin film transistor (TFT) disconnects, and makes the first blue pixel area B1 in running order, the second blue pixel area
B2 is in off position, and now, pixel cell is by red pixel area R, green pixel area G and the first blue pixel area B1 structures
Into；After decay occurs in the brightness of the pixel cell being made up of the first blue pixel area B1, by control end T4 input low level
Pulse signal, first film transistor disconnect, and the second thin film transistor (TFT) is turned on, and make the second blue pixel area B2 be in work shape
State, the first blue pixel area B1 are in off position, and now, pixel cell is by red pixel area R, green pixel area G and the
Two blue pixel area B2 are constituted, so that the second blue pixel area B2 replaces the first blue pixel area B1 work, extend picture
The working time of plain unit and service life.
In the present embodiment, the brightness of the pixel cell occur decay refer to the brightness decay 5% of the pixel cell with
On.After the brightness decay more than 5% of pixel cell, can be actually needed according to user, the first blue pixel area is carried out by software
The active switching of B1 and the second blue pixel area B2, it is also possible to sending out in the first blue pixel area B1 or the second blue pixel area B2
After the luminescent material of optical diode reaches the half-life, cutting automatically for the first blue pixel area B1 and the second blue pixel area B2 is carried out
Change.Wherein it is possible to according to the half-life and half-life brightness value that pre-set, judge the first blue pixel area B1 or second
Whether blue pixel area B2 reaches the half-life.
The first blue pixel area B1 arrival half-life refers to the corresponding first light emitting diode B10 of the first blue pixel area B1
Luminescent material reach the half-life.As luminescent material is different, blue pixel area reaches the time of half-life and brightness value also not
With accordingly, it would be desirable to carry out experimental verification, material behavior analysis and senile experiment in advance to the light LED material of display floater
Etc. technique, the half-life and half-life brightness value of the first light emitting diode B10, and the half-life that will be obtained is obtained
It is set in advance in pixel-driving circuit with parameters such as brightness values.
The display floater that the present embodiment is provided, when decay occurs in the brightness of the pixel cell being made up of the first blue pixel area
Afterwards, can pass through to turn on the second controlling switch, make the second blue pixel area replace the work of the first blue pixel area, when blue by second
After decay occurs in the brightness of the pixel cell that color pixel area is constituted, can pass through to turn on the first controlling switch, make the first blue picture
Plain area replaces the work of the second blue pixel area, you can with the alternating work by the first blue pixel area and the second blue pixel area
Make, extend working time and the service life of pixel cell, and then extend the service life of display floater.
A kind of image element driving method of the display floater as described in above-mentioned embodiment is present embodiments provided, flow chart is as schemed
Shown in 5, including：
S501：The first controlling switch is turned on, and disconnects the second controlling switch, make the first blue pixel area be in work shape
State, the second blue pixel area are in off position；
In the present embodiment, the first controlling switch M10 is N-type TFT, and the second controlling switch M20 is that p-type film is brilliant
Body pipe.During pixel cell initialization, to control end T4 input high level pulse signal, the first controlling switch M10 is turned on, and second
Controlling switch M20 disconnects so that the first light emitting diode B10 lights, and the second light emitting diode B20 does not light, i.e., so that first
B1 is in running order in blue pixel area, and the second blue pixel area B2 is in off position, and now, pixel cell is by red picture
Plain area R, green pixel area G and the first blue pixel area B1 are constituted.
S502：Judge whether the brightness of the pixel cell being made up of the first blue pixel area occurs decaying；
The pixel cell continuous firing being made up of red pixel area R, green pixel area G and the first blue pixel area B1 is certain
After time, the luminescent material of the first light emitting diode B10 can occur aging, cause the brightness of the first light emitting diode B10 continuous
Decay, and then cause the brightness of pixel cell decay occur, accordingly, it would be desirable to judge whether the brightness of pixel cell occurs decaying,
If it is, step S503 is entered, if it is not, then return to step S502, after certain time intervals, judges the picture again
Whether plain unit occurs is decayed.
Wherein, the brightness appearance decay of pixel cell refers to the brightness decay of the pixel cell more than 5%.Judge picture
Whether the brightness of plain unit there is the process of decay：By detecting whether the brightness of circuit judges pixel cell decays 5%
More than, if it is, there is decay in the brightness of the pixel cell.
After the brightness decay more than 5% of the pixel cell being made up of the first blue pixel area B1, user can be according to actual need
Will, the active switching for carrying out the first blue pixel area B1 and the second blue pixel area B2 using software solves display floater brightness
Decay and the problem for increasing the service life, it is also possible to after the first blue pixel area B1 reaches the half-life, carry out the first blue picture
Plain area B1 and the automatic switchover of the second blue pixel area B2, solve the problems, such as display floater brightness decay and increase the service life,
Now, judge that the process that decaying occurs in the brightness of the pixel cell being made up of the first blue pixel area B1 is to judge that first is blue
Whether pixel region B1 reaches the half-life, if it is, decay occurs in the brightness of the pixel cell.
In the present embodiment, it is to judge that described first is blue to judge whether the first blue pixel area B1 reaches the process of half-life
Whether the working time of color pixel area B1 is equal to default half-life, if equal to, then the first blue pixel area B1
Reach the half-life.In other embodiments, it can be to pass through to judge whether the first blue pixel area B1 reaches the process of half-life
Whether the brightness value of the pixel cell that detection circuit judges are made up of the first blue pixel area B1 is equal to the default half-life
Brightness value, if equal to, then the first blue pixel area B1 reaches the half-life.
S503：After decay occurs in the brightness of the pixel cell being made up of the first blue pixel area, first control is disconnected
System switch, and second controlling switch is turned on, make the second blue pixel area in running order, make first blueness
Pixel region is in off position；
After there is decay in the brightness of the pixel cell being made up of the first blue pixel area B10, can be defeated to control end T4
Enter low level pulse signal, disconnect the first controlling switch M10, turn on the second controlling switch M20, make at the second blue pixel area B2
In working condition, make the first blue pixel area B1 in off position, now, pixel cell is by red pixel area R, green picture
Plain area G and the second blue pixel area B2 is constituted.
S504：Judge whether the brightness of the pixel cell being made up of the second blue pixel area occurs decaying；
Judge that the process that decaying occurs in the brightness of the pixel cell being made up of the second blue pixel area B2 is, by detecting electricity
Whether the brightness of road detection pixel cell decays more than 5%, if it is, decay occurs in the brightness of the pixel cell.If institute
There is decay in the brightness for stating pixel cell, then enter step S505, if it is not, then return to step S504, at certain interval
Between after, judge whether the pixel cell occurs decaying again.
After the brightness decay more than 5% of pixel cell, user actively can switch according to actual needs, it is also possible to second
After blue pixel area B2 reaches the half-life, the automatic switchover of the first blue pixel area B1 and the second blue pixel area B2 is carried out.Its
In, it is to judge the second blue picture to judge that the process of decay occurs in the brightness of the pixel cell being made up of the second blue pixel area B2
Whether plain area B2 reaches the half-life, if it is, decay occurs in the brightness of the pixel cell.
In the present embodiment, it is to judge that described second is blue to judge whether the second blue pixel area B2 reaches the process of half-life
Whether the working time of color pixel area B2 is equal to default half-life, if equal to, then the second blue pixel area B2
Reach the half-life.In other embodiments, it can be to pass through to judge whether the second blue pixel area B2 reaches the process of half-life
Whether the brightness value of the pixel cell that detection circuit judges are made up of the second blue pixel area B2 is equal to the default half-life
Brightness value, if equal to, then the second blue pixel area B2 reaches the half-life.
S505：After decay occurs in the brightness of the pixel cell being made up of the second blue pixel area, first control is turned on
System switch, makes the first blue pixel area in running order, and disconnects second controlling switch, makes second blueness
Pixel region is in off position.
After decay occurs in the brightness of the pixel cell being made up of the second blue pixel area, to control end T4 high input voltage
Pulse signal, turns on first controlling switch M10, makes the first blue pixel area B1 in running order, disconnects described
Second controlling switch M20, makes the second blue pixel area B2 be in off position so that the second blue pixel area B2 replaces
First blue pixel area B1 works, so as to extend the service life of pixel cell.
The image element driving method that the present embodiment is provided, when the brightness of the pixel cell being made up of the first blue pixel area occurs
After decay, the second controlling switch is turned on, make the second blue pixel area replace the work of the first blue pixel area, when by the second blue picture
After decay occurs in the brightness of the pixel cell that plain area is constituted, the first controlling switch is turned on, make the first blue pixel area replace second
Blue pixel area works, and extends working time and the service life of pixel cell, and then extends the service life of display floater.
A kind of display floater is present embodiments provided, the structure of its pixel cell and signal control circuit and the first reality
Apply example identical, will not be described here.
The circuit diagram of the pixel-driving circuit that the present embodiment is provided is as shown in fig. 6, emission control circuit includes：With the letter
The power supply line control switch of number control circuit, i.e. first controlling switch M11 and the second controlling switch of transistor M4 electrical connections
M21；The first control end T5 for electrically connecting with first controlling switch M11 and the second controlling switch M21 respectively and the second control
End T6；Negative pole with electrically connect, the first light emitting diode B10 that positive pole is electrically connected with first controlling switch M11；Negative pole with
Ground electrical connection, the second light emitting diode B20 that positive pole is electrically connected with second controlling switch M21.
In the present embodiment, first controlling switch M11 is first film transistor, and second controlling switch M21 is
Second thin film transistor (TFT), specifically, the first film transistor and the second thin film transistor (TFT) are all N-type TFT, and
The first end of the first film transistor and the second thin film transistor (TFT) is drain electrode, and the second end is grid, and the 3rd end is source electrode.When
So, in other embodiments, the first film transistor and the second thin film transistor (TFT) can be all P-type TFT, its
The operation principle of the pixel-driving circuit of composition is identical with the present embodiment, will not be described here.
Now, the drain electrode of first film transistor and the second thin film transistor (TFT) is all with the transistor M4's of signal control circuit
Source electrode is electrically connected, and the grid of first film transistor electrically connected with the first control end T5, the grid of the second thin film transistor (TFT) and the
Two control ends T6 are electrically connected, and the source electrode of first film transistor is electrically connected with the positive pole of the first light emitting diode, and the second film is brilliant
The source electrode of body pipe is electrically connected with the positive pole of the second light emitting diode.
During pixel cell initialization, by the first control end T5 input high level pulse signal, the first film crystal is made
Pipe is turned on, and by the second control end T6 input low level pulse signal, disconnects the second thin film transistor (TFT), and now, first is blue
Pixel region B1 is in running order, and the second blue pixel area B2 is in off position, and now, pixel cell is by red pixel area
R, green pixel area G and the first blue pixel area B1 are constituted.
When the brightness of the pixel cell being made up of red pixel area R, green pixel area G and the first blue pixel area B1 occurs
After decay, by the first control end T5 input low level pulse signal, disconnect first film transistor, by the second control end
T6 input high level signals, turn on the second thin film transistor (TFT), and now, the second blue pixel area B2 is in running order, and first
Blue pixel area B1 is in off position；Or first control end T5 and the equal input high level pulse signal of the second control end T6,
It is both turned on first film transistor and the second thin film transistor (TFT), now, the first blue pixel area B1 and the second blue pixel area
B2 is in working condition.
In the present embodiment, the brightness of the pixel cell occur decay refer to the brightness decay 5% of the pixel cell with
On, after the brightness decay more than 5% of pixel cell, user can carry out the first blue pixel area by software according to actual needs
B1 and the automatic switchover of the second blue pixel area B2, it is also possible to sending out in the first blue pixel area B1 or the second blue pixel area B2
After the material of optical diode reaches the half-life, the automatic switchover of the first blue pixel area B1 and the second blue pixel area B2 is carried out.
Wherein it is possible to judge that the first blue pixel area B1 or second is blue according to the half-life and half-life brightness value for pre-setting
Whether pixel region B2 reaches the half-life.
The half-life of the first blue pixel area B1 refers to the corresponding first light emitting diode B10's of the first blue pixel area B1
Luminescent material reaches the half-life.As luminescent material is different, the brightness for reaching the time and half-life of half-life is also different, because
This, need to carry out experimental verification, material behavior analysis and senile experiment etc. in advance, obtain to the light LED material of display floater
Obtain the half-life and half-life brightness value of the luminiferous material of the first light emitting diode B10.
The display floater that the present embodiment is provided, when decay occurs in the brightness of the pixel cell being made up of the first blue pixel area
Afterwards, can pass through to turn on the second controlling switch, make the second blue pixel area replace the work of the first blue pixel area, when blue by second
After decay occurs in the brightness of the pixel cell that color pixel area is constituted, can pass through to turn on the first controlling switch, make the first blue picture
Plain area replaces the work of the second blue pixel area, or the first blue pixel area and the second blue pixel area work simultaneously, extend picture
The working time of plain unit and service life, and then extend the service life of display floater.
A kind of image element driving method of display floater as above described in an embodiment is present embodiments provided, flow chart is as schemed
Shown in 7, including：
S701：The first controlling switch is turned on, and disconnects the second controlling switch, make the first blue pixel area be in work shape
State, the second blue pixel area are in off position；
In the present embodiment, the first controlling switch M11 and the second controlling switch M21 are all N-type TFT, certainly,
In other embodiment, the first controlling switch M11 and the second controlling switch M21 can all be P-type TFT.At the beginning of pixel cell
During beginning work, to the first control end T5 input high level pulse signal, the first controlling switch M11 is turned on, to the second control end T6
Input low level pulse signal, the second controlling switch M21 disconnect so that the first blue pixel area B1 is in running order, and second
Blue pixel area B2 is in off position, and now, pixel cell is by red pixel area R, green pixel area G and the first blue picture
Plain area B1 is constituted.
S702：Judge whether the brightness of the pixel cell being made up of the first blue pixel area occurs decaying；
The pixel cell continuous firing being made up of red pixel area R, green pixel area G and the first blue pixel area B1 is certain
After time, the luminescent material of the first light emitting diode B10 can occur aging, cause the brightness of the first light emitting diode B10 continuous
Decay, and then cause the brightness of pixel cell decay occur.After judging whether the brightness of pixel cell decay occurs, if it is,
Step S703 is entered then, if it is not, then return to step S702, after certain time intervals, judges the pixel cell again
Whether appearance decays.
Wherein, there is decay and refers to the pixel cell in the brightness of the pixel cell being made up of the first blue pixel area B1
Brightness decay more than 5%.Judge that the process that decaying occurs in the brightness of pixel cell can be：By detecting electric circuit inspection pixel
Whether the brightness of unit decays more than 5%, if it is, decay occurs in the brightness of the pixel cell.
After the brightness decay more than 5% of the pixel cell being made up of the first blue pixel area B1, user can be according to actual need
Will, the active switching for carrying out the first blue pixel area B1 and the second blue pixel area B2 using software solves display floater brightness
Decay and the problem for increasing the service life, it is also possible to after the first blue pixel area B1 reaches the half-life, carry out the first blue picture
Plain area B1 and the automatic switchover of the second blue pixel area B2, now, judge the pixel cell being made up of the first blue pixel area B1
Brightness occur decay process be to judge whether the first blue pixel area B1 reaches the half-life, if it is, the pixel list
There is decay in the brightness of unit.
In the present embodiment, it is to judge that described first is blue to judge whether the first blue pixel area B1 reaches the process of half-life
Whether the working time of color pixel area B1 is equal to default half-life, if equal to, then the first blue pixel area arrives
Reach the half-life.In other embodiments, judge whether the first blue pixel area reaches the process of half-life and be, by detecting circuit
Judge whether the brightness value of the pixel cell being made up of the first blue pixel area B1 is equal to default half-life brightness value, such as
Fruit is equal to, then the first blue pixel area reaches the half-life.
S703：After decay occurs in the brightness of the pixel cell being made up of the first blue pixel area, first control is disconnected
System switch, and second controlling switch is turned on, make the second blue pixel area in running order, make first blueness
Pixel region is in off position；
After decay occurs in the brightness of the pixel cell being made up of the first blue pixel area B1, it is input into the first control end T5
Low level pulse signal, disconnects first controlling switch M11, to the second control end T6 input high level pulse signal, conducting
Second controlling switch M21, makes the second blue pixel area B2 in running order, makes the first blue pixel area B1
Off position is in, now, pixel cell is made up of red pixel area R, green pixel area G and the second blue pixel area B2.
In another embodiment of the invention, can go out in the brightness of the pixel cell being made up of the first blue pixel area B1
After now decaying, to the second control end T6 input high level pulse signal, the second controlling switch M21 is turned on, the first blue pixel is made
Area B1 and the second blue pixel area B2 are simultaneously in working condition, extend the working time of pixel cell.
S704：Judge whether the brightness of the pixel cell being made up of the second blue pixel area occurs decaying；
Judge that the process that decaying occurs in the brightness of the pixel cell being made up of the second blue pixel area B2 is, by detecting electricity
Whether the brightness of road detection pixel cell decays more than 5%, if it is, decay occurs in the brightness of the pixel cell.Judge picture
After whether the brightness of plain unit there is decay, if it is, step S705 is entered, if it is not, then return to step S704, certain
Time interval after, judge whether the pixel cell occurs decaying again.
After the brightness decay more than 5% of the pixel cell being made up of the second blue pixel area, can be actually needed according to user
Carry out active switching, it is also possible to after the second blue pixel area B2 reaches the half-life, carry out the first blue pixel area B1 and second
The automatic switchover of blue pixel area B2.Wherein, judge that declining occurs in the brightness of the pixel cell being made up of the second blue pixel area B2
The process for subtracting is to judge whether the second blue pixel area B2 reaches the half-life, if it is, the brightness of the pixel cell occurs
Decay.
In the present embodiment, it is to judge that described second is blue to judge whether the second blue pixel area B2 reaches the process of half-life
Whether the working time of color pixel area B2 is equal to default half-life, if equal to, then the second blue pixel area B2
Reach the half-life.In other embodiments, it can be to pass through to judge whether the second blue pixel area B2 reaches the process of half-life
It is bright whether the brightness of the pixel cell that detection circuit judges are made up of the second blue pixel area B2 is equal to the default half-life
Degree, if equal to, then the second blue pixel area B2 reaches the half-life.
S705：After decay occurs in the brightness of the pixel cell being made up of the second blue pixel area, first control is turned on
System switch, makes the first blue pixel area and the second blue pixel area be simultaneously in working condition.
After decay occurs in the brightness of the pixel cell being made up of the second blue pixel area B2, to the first control end T5 and the
Two control end T6 input high level pulse signals, turn on first controlling switch M11, make the first blue pixel area and the
Two blue pixel areas are simultaneously in working condition, extend the working time of pixel cell.
In other embodiments of the invention, can go out in the brightness of the pixel cell being made up of the second blue pixel area B2
After now decaying, the first controlling switch M11 is turned on, and disconnects the second controlling switch M21, make the first blue pixel area B1 replace second
Blue pixel area B2, extends the working time of pixel cell.
The image element driving method that the present embodiment is provided, when the brightness of the pixel cell being made up of the first blue pixel area occurs
After decay, can pass through to turn on the second controlling switch, make the second blue pixel area replace the work of the first blue pixel area, when by the
After decay occurs in the brightness of the pixel cell of two blue pixel areas composition, can pass through to turn on the first controlling switch, make the first indigo plant
Color pixel area replaces the work of the second blue pixel area, or the first blue pixel area and the second blue pixel area work simultaneously, prolong
The working time of long pixel cell and service life, and then extend the service life of display floater.
The above embodiments of the present application are illustrated with the corresponding light LED material in blue pixel area, further, root
Also similar setting can be carried out in other colors (for example red, green) the corresponding light LED material of pixel region according to needs,
First red pixel area is for example set with the second red pixel area, the first green pixel area and the second green pixel area.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, as which corresponds to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
Bright.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Multiple modifications of these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized without departing from the spirit or scope of the present invention in other embodiments.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (16)
1. a kind of display floater, it is characterised in that include：
Multiple pixel cells, the pixel cell include the first colored pixels area, the second colored pixels area and the 3rd colored pixels
Area, wherein the 3rd colored pixels area include the first sub-pixel area and the second sub-pixel area；
Pixel-driving circuit, including signal control circuit and emission control circuit, the emission control circuit includes：
The first controlling switch electrically connected with the power supply line control switch of the signal control circuit and the second controlling switch；
The control end electrically connected with first controlling switch and the second controlling switch；
Negative pole with electrically connect, the first light emitting diode that positive pole is electrically connected with first controlling switch；
Negative pole with electrically connect, the second light emitting diode that positive pole is electrically connected with second controlling switch；
Wherein, the pixel-driving circuit is after decay occurs in the brightness of pixel cell, by controlling first controlling switch
Be turned on or off, make first sub-pixel area in running order or off position, by control described second control
Being turned on or off for switch, makes second sub-pixel area in running order or off position；Wherein, conducting first is controlled
Switch, and the second controlling switch is disconnected, make the first sub-pixel area in running order, the second sub-pixel area is in the shape that do not work
State；Judge whether the brightness of the pixel cell being made up of the first sub-pixel area occurs decaying；When be made up of the first sub-pixel area
After decay occurs in the brightness of pixel cell, first controlling switch is disconnected, and turns on second controlling switch, make described the
Two sub-pixel areas are in running order, make first sub-pixel area be in off position.
2. display floater according to claim 1, it is characterised in that the brightness of the pixel cell decay occurs and refers to institute
State the brightness decay more than 5% of pixel cell；Wherein the first colored pixels area, the second colored pixels area and the 3rd colored pixels area
Respectively red pixel area, green pixel area and blue pixel area.
3. display floater according to claim 2, it is characterised in that the pixel-driving circuit is in first sub-pixel
After area or the second sub-pixel area reach the half-life, by controlling being turned on or off for first controlling switch, described first is made
Sub-pixel area is in running order or off position, by controlling being turned on or off for second controlling switch, makes described
Second sub-pixel area is in running order or off position.
4. display floater according to claim 3, it is characterised in that first controlling switch is the first film crystal
Pipe, second controlling switch is the second thin film transistor (TFT), and the of the first film transistor and the second thin film transistor (TFT)
One end is electrically connected with the power supply line control switch of the signal control circuit, and the second end is electrically connected with the control end, and described
3rd end of one thin film transistor (TFT) is electrically connected with first light emitting diode, the 3rd end of second thin film transistor (TFT) and the
Two light emitting diodes are electrically connected.
5. display floater according to claim 4, it is characterised in that the first film transistor and the second film crystal
Pipe is all N-type TFT or P-type TFT.
6. display floater according to claim 5, it is characterised in that the first film transistor and the second film crystal
The first end of pipe is drain electrode, and the second end is grid, and the 3rd end is source electrode, and the first film transistor and the second film crystal
The grid of pipe is electrically connected with the first control end and the second control end respectively.
7. display floater according to claim 4, it is characterised in that the first film transistor is N-type film crystal
Pipe, second thin film transistor (TFT) are P-type TFT.
8. display floater according to claim 7, it is characterised in that the first end of the first film transistor is leakage
Pole, the second end are grid, and the 3rd end is source electrode；The first end of second thin film transistor (TFT) is source electrode, and the second end is grid, the
Three ends are drain electrode.
9. a kind of image element driving method of the display floater as described in any one of claim 1-8, it is characterised in that include：
The first controlling switch is turned on, and disconnects the second controlling switch, make the first sub-pixel area in running order, the second sub-pixel
Area is in off position；
Judge whether the brightness of the pixel cell being made up of the first sub-pixel area occurs decaying；
After decay occurs in the brightness of the pixel cell being made up of the first sub-pixel area, first controlling switch is disconnected, and is led
Lead to second controlling switch, make second sub-pixel area in running order, first sub-pixel area is made in not work
Make state.
10. method according to claim 9, it is characterised in that also include：
Judge whether the brightness of the pixel cell being made up of the second sub-pixel area occurs decaying；
After decay occurs in the brightness of the pixel cell being made up of the second sub-pixel area, first controlling switch is turned on, institute is made
State the first sub-pixel area and the second sub-pixel area and be simultaneously in working condition.
11. methods according to claim 9, it is characterised in that also include：
Judge whether the brightness of the pixel cell being made up of the second sub-pixel area occurs decaying；
After decay occurs in the brightness of the pixel cell being made up of the second sub-pixel area, first controlling switch is turned on, institute is made
State the first sub-pixel area in running order, and disconnect second controlling switch, second sub-pixel area is made in not work
Make state.
12. methods according to claim 10 or 11, it is characterised in that the brightness of the pixel cell decay occurs and refers to
The brightness decay of the pixel cell more than 5%.
13. methods according to claim 12, it is characterised in that judge that the process of decay occurs in the brightness of pixel cell
For：
By detecting whether the brightness of circuit judges pixel cell decays more than 5%, if it is, the brightness of the pixel cell
There is decay.
14. methods according to claim 12, it is characterised in that the pixel cell for judging to be made up of the first sub-pixel area
It is to judge whether the first sub-pixel area reaches the half-life that the process of decay occurs in brightness, if it is, the pixel cell is bright
There is decay in degree；
Judge that the process that decaying occurs in the brightness of the pixel cell being made up of the second sub-pixel area is to judge that the second sub-pixel area is
The no arrival half-life, if it is, there is decay in the brightness of the pixel cell.
15. methods according to claim 14, it is characterised in that judge whether the first sub-pixel area reaches the mistake of half-life
Cheng Wei, judges that whether the working time of first sub-pixel area is equal to default half-life, if equal to, then described the
One sub-pixel area reaches the half-life；
Whether judge whether the second sub-pixel area reaches the process of half-life is to judge working time of second sub-pixel area
Default half-life is equal to, if equal to, then second sub-pixel area reaches the half-life.
16. methods according to claim 14, it is characterised in that judge whether the first sub-pixel area reaches the mistake of half-life
Whether Cheng Wei, the brightness value of the pixel cell being made up of first sub-pixel area detection circuit judges are equal to default half
Decline phase brightness value, if equal to, then first sub-pixel area reaches the half-life；
Judge whether the second sub-pixel area reaches the process of half-life and be, by detecting circuit judges by second sub-pixel area
Whether the brightness value of the pixel cell of composition is equal to default half-life brightness value, if equal to, then second sub-pixel area
Reach the half-life.
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