CN109637455A - A kind of array substrate, its driving method, display panel and display device - Google Patents
A kind of array substrate, its driving method, display panel and display device Download PDFInfo
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- CN109637455A CN109637455A CN201910028243.9A CN201910028243A CN109637455A CN 109637455 A CN109637455 A CN 109637455A CN 201910028243 A CN201910028243 A CN 201910028243A CN 109637455 A CN109637455 A CN 109637455A
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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]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3233—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the current through the light-emitting element
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- Control Of El Displays (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
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Abstract
The invention discloses a kind of array substrate, its driving method, display panel and display devices, when the brightness for the light that luminescent device issues reduces, photo resistance receives the light correspondence that luminescent device issues and is converted to the biggish resistance of resistance value, the biggish photo resistance of resistance value increases the electric current for flowing into compensation luminescent device by pixel compensation circuit, then compensate the brightness enhancing of the light of luminescent device sending, the brightness for the light that luminescent device issues is compensated, realizes the problem of brightness of image as caused by device aging reduces；When the brightness of luminescent device is higher, the resistance value of photo resistance just becomes smaller, the lesser photo resistance of resistance value makes the current reduction for flowing into compensation luminescent device by pixel compensation circuit, the brightness for then compensating the light of luminescent device sending reduces, therefore photo resistance can adjust the electric current for flowing into compensation luminescent device according to the brightness power that luminescent device shines, the luminous power of control compensation luminescent device realizes the uniformity of whole display picture brightness.
Description
Technical field
The present invention relates to field of display technology, in particular to a kind of array substrate, its driving method, display panel and display
Device.
Background technique
Organic Light Emitting Diode (Organic Light Emitting Diode, OLED) is current flat-panel monitor research
One of the hot spot in field is compared with liquid crystal display (Liquid Crystal Display, LCD), and OLED display has low
Energy consumption, production cost be low, self-luminous, wide viewing angle and the advantages that fast response time.Currently, in mobile phone, tablet computer, digital camera
Etc. display fields, OLED display, which has begun, replaces traditional LCD display.
Different using stable voltage control brightness from LCD, OLED belongs to electric current driving, and stable electric current is needed to control
It shines.Due to manufacturing process and device aging etc., the threshold voltage V of the driving transistor of array substrate can be madethIn the presence of
Inhomogeneities is changed which results in the electric current for flowing through each OLED so that display brightness is uneven, and device aging
It will lead to the reduction of display brightness, to influence the display effect of whole image.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of array substrate, its driving method, display panel and display dresses
It sets, to improve the brightness and uniformity of display device display area image.
Therefore, the embodiment of the invention provides a kind of array substrate, including multiple pixel units, each pixel units
Include: luminescent device, for driving the pixel-driving circuit of the luminescent device, compensates luminescent device, and for driving
State the pixel compensation circuit of compensation luminescent device；Wherein, the pixel compensation circuit includes in parallel with the compensation luminescent device
Photo resistance；
When the pixel-driving circuit drives the luminescent device to shine, the photo resistance is used for the institute that will be received
The light for stating luminescent device sending is converted into the resistance value that the brightness of the light issued with the luminescent device is inversely proportional, and is flowed into controlling
The electric current of the compensation luminescent device.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the pixel compensation electricity
Road further include: first switch transistor and divider resistance；Wherein,
The grid of the first switch transistor is connected with data signal end, the source electrode and electricity of the first switch transistor
Source is connected, and the first end of the drain electrode divider resistance of the first switch transistor is connected, and the second of the divider resistance
It holds and is extremely connected with the first of the compensation luminescent device, the second pole of the compensation luminescent device is connected with the ground terminal, institute
The third end for stating divider resistance is connected with the first end of the photo resistance, the second end of the photo resistance and the ground terminal
It is connected.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the divider resistance packet
It includes: first resistor and second resistance；Wherein,
The first end of the first resistor is connected with the drain electrode of the first switch transistor, and the second of the first resistor
End is connected with the first end of the first end of the second resistance and the photo resistance respectively；
The second end of the second resistance is extremely connected with the first of the compensation luminescent device.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the compensation hair is flowed into
The electric current of optical device and the resistance value of the photo resistance meet following formula:
Wherein, I indicates to flow into the electric current of the compensation luminescent device, and U indicates the voltage of the power end, described in R1 expression
First resistor, R2 indicate the second resistance, and R indicates the photo resistance.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the luminescent device and
It being separated between the compensation luminescent device using barrier layer, the photo resistance is located at the light-emitting surface side of the luminescent device,
And the orthographic projection no overlap region of the photo resistance and the compensation luminescent device on substrate.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the luminescent device and
Film layer same layer setting with the same function in the compensation luminescent device.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the photo resistance
Material includes cadmium sulfide, aluminium sulfide, vulcanized lead, bismuth sulfide or selenium.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the pixel driver electricity
Road includes: second switch transistor, capacitor and driving transistor；Wherein,
The grid of the second switch transistor is connected with control signal end, the source electrode of the second switch transistor and institute
It states data signal end to be connected, the drain electrode of the second switch transistor is connected with the grid of the driving transistor；
The drain electrode of the driving transistor is connected with the power end, the source electrode and the photophore of the driving transistor
The first of part is extremely connected, and the second pole of the luminescent device is connected with the ground terminal；
The first end of the capacitor is connected to drain electrode and the grid of the driving transistor of the second switch transistor
Between, the second end of the capacitor is connected with the ground terminal.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the first switch is brilliant
The breadth length ratio of body pipe is greater than the breadth length ratio of the driving transistor.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the first switch is brilliant
The breadth length ratio of body pipe is 2 times or 3 times of the breadth length ratio of the driving transistor.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the first switch is brilliant
Body pipe and the driving transistor are N-type transistor or are P-type transistor.
Optionally, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the first switch is brilliant
Film layer same layer setting with the same function in body pipe, the second switch transistor and the driving transistor.
Correspondingly, the embodiment of the invention also provides a kind of display panels, including above-mentioned provided in an embodiment of the present invention
A kind of array substrate.
Correspondingly, the embodiment of the invention also provides a kind of display device, including it is provided in an embodiment of the present invention above-mentioned aobvious
Show panel.
Correspondingly, the embodiment of the invention also provides a kind of any of the above-described kind of array substrates provided in an embodiment of the present invention
Driving method, comprising:
When the pixel-driving circuit drives the luminescent device to shine, the hair that the photo resistance will receive
The light that optical device issues is converted into the resistance value that the brightness of the light issued with the luminescent device is inversely proportional, described in control inflow
Compensate the electric current of luminescent device.
The beneficial effect of the embodiment of the present invention includes:
Array substrate, its driving method, display panel and display device provided in an embodiment of the present invention, the array substrate are logical
It crosses and increases compensation luminescent device, and the pixel compensation circuit for driving compensation luminescent device in each pixel unit, and
Pixel compensation circuit includes the photo resistance in parallel with compensation luminescent device；When luminescent device carries out luminous, work as luminescent device
When the brightness of the light issued due to aging etc. is reduced, photo resistance receives the light correspondence that luminescent device issues and is converted to resistance value
Biggish resistance, the biggish photo resistance of resistance value can be such that the electric current for flowing into compensation luminescent device increases by pixel compensation circuit
Greatly, then compensate the brightness enhancing of the light of luminescent device sending, the brightness of light issued to luminescent device compensates, realize due to
The problem of brightness of image caused by device aging reduces；In addition, uniformity of the array substrate provided by the invention to display picture
Also it has some improvement, this is because the resistance value of photo resistance just becomes when the brightness for the light that part luminescent device issues is higher
Small, the lesser photo resistance of resistance value can make the current reduction for flowing into compensation luminescent device by pixel compensation circuit, then compensate
The brightness for the light that luminescent device issues reduces, therefore photo resistance can be adjusted according to the power of the luminous brightness of luminescent device
The electric current of compensation luminescent device, the luminous power of control compensation luminescent device are flowed into, to realize whole display picture brightness
Uniformity.Therefore, above-mentioned array substrate provided in an embodiment of the present invention can be improved the bright of display area picture in display device
Degree and uniformity.
Detailed description of the invention
Fig. 1 is one of the electrical block diagram of pixel unit of array substrate provided in an embodiment of the present invention；
Fig. 2 is the two of the electrical block diagram of the pixel unit of array substrate provided in an embodiment of the present invention；
Fig. 3 is the structural schematic diagram of array substrate provided in an embodiment of the present invention.
Specific embodiment
In order to make the purpose of the present invention, the technical scheme and advantages are more clear, with reference to the accompanying drawing, to the embodiment of the present invention
The array substrate of offer, its driving method, display panel and display device specific embodiment be described in detail.
A kind of array substrate provided in an embodiment of the present invention, including multiple pixel units, as shown in Figure 1, each pixel list
Member includes: luminescent device L1, for driving the pixel-driving circuit 1 of luminescent device L1, compensates luminescent device L2, and for driving
The pixel compensation circuit 2 of dynamic compensation luminescent device L2；Wherein, pixel compensation circuit 2 includes in parallel with compensation luminescent device L2
Photo resistance R；
When pixel-driving circuit 1 drives luminescent device L1 to shine, photo resistance R is used for the luminescent device L1 that will be received
The light of sending is converted into the resistance value being inversely proportional with the brightness of the luminescent device L1 light issued, flows into compensation luminescent device with control
The electric current of L2.
Array substrate provided in an embodiment of the present invention compensates luminescent device by increasing in each pixel unit, and is used for
The pixel compensation circuit of driving compensation luminescent device, and pixel compensation circuit includes the photosensitive electricity in parallel with compensation luminescent device
Resistance；When luminescent device carries out luminous, when the brightness for the light that luminescent device is issued due to aging etc. reduces, photo resistance
It receives the light correspondence that luminescent device issues and is converted to the biggish resistance of resistance value, the biggish photo resistance of resistance value can be mended by pixel
Repaying circuit increases the electric current for flowing into compensation luminescent device, then the brightness enhancing of the light of luminescent device sending is compensated, to photophore
The brightness for the light that part issues compensates, and realizes the problem of brightness of image as caused by device aging reduces；In addition, of the invention
The array substrate of offer also has some improvement to the uniformity of display picture, this is because when the light of part luminescent device sending
Brightness it is higher when, the resistance value of photo resistance just becomes smaller, and the lesser photo resistance of resistance value can make to flow by pixel compensation circuit
Enter to compensate the current reduction of luminescent device, then the brightness for compensating the light of luminescent device sending reduces, therefore photo resistance can root
The power of the brightness to shine according to luminescent device flows into the electric current of compensation luminescent device to adjust, and control compensation luminescent device shines
Power, to realize the uniformity of whole display picture brightness.Therefore, above-mentioned array substrate provided in an embodiment of the present invention can
Improve the brightness and uniformity of display area picture in display device.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in Figure 1, picture
Plain compensation circuit 2 further include: first switch transistor M1 and divider resistance 01；Wherein, the grid of first switch transistor M1 with
Data signal end Data is connected, and the source electrode of first switch transistor M1 is connected with power end Vdd, the leakage of first switch transistor M1
The first end of pole divider resistance 01 is connected, and the second end of divider resistance 01 is extremely connected with the first of compensation luminescent device L2, compensates
The second pole of luminescent device L2 is connected with ground terminal Gnd, and the third end of divider resistance 01 is connected with the first end of photo resistance R,
The second end of photo resistance R is connected with ground terminal Gnd.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in Figure 1, point
Piezoresistance 01 includes: first resistor R1 and second resistance R2；Wherein,
The first end of first resistor R1 is connected with the drain electrode of first switch transistor M1, the second end difference of first resistor R1
It is connected with the first end of the first end of second resistance R2 and photo resistance R；
The second end of second resistance R2 is extremely connected with the first of compensation luminescent device L2.
Further, in the specific implementation, it in above-mentioned array substrate provided in an embodiment of the present invention, flows into compensation and shines
The electric current of device and the resistance value of photo resistance meet following formula:
Wherein, I indicates to flow into the electric current of compensation luminescent device, and U indicates that the voltage of power end, R1 indicate first resistor, R2
Indicate second resistance, R indicates photo resistance.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in Fig. 2, picture
Plain driving circuit 1 can specifically include: second switch transistor M2, capacitor C and driving transistor M0；Wherein,
The grid of second switch transistor M2 is connected with control signal end Gate, the source electrode and number of second switch transistor M2
It is connected according to signal end Data, the drain electrode of second switch transistor M2 is connected with the grid of driving transistor M0；
The drain electrode of driving transistor M0 is connected with power end Vdd, and the of source electrode and the luminescent device L1 of driving transistor M0
One is extremely connected, and the second pole of luminescent device L1 is connected with ground terminal Gnd；
The first end of capacitor C is connected between the drain electrode of second switch transistor M2 and the grid of driving transistor M0, electricity
The second end for holding C is connected with ground terminal Gnd.
The above is only the specific structures for illustrating pixel-driving circuit, in the specific implementation, the tool of pixel-driving circuit
Body structure is not limited to above-mentioned 2M1C structure provided in an embodiment of the present invention, can also be skilled person will appreciate that other knots
Structure, it is not limited here.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in Fig. 2, the
One switching transistor M1 and driving transistor M0 are N-type transistor or are P-type transistor.It can guarantee first switch in this way
Transistor M1 and the driving equal M0 of transistor are opened simultaneously close off simultaneously, realize that compensation luminescent device mends the brightness of luminescent device
It repays.Certainly, in the specific implementation, first switch transistor M1 and driving transistor M0 can be P-type transistor, not do herein
It limits.Second switch transistor M2 can be N-type transistor or can be P-type transistor.It is in the embodiment of the present invention
One switching transistor M1, second switch transistor M2 and driving transistor M0 are to be illustrated for N-type transistor,
In the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, N-type transistor is acted in high potential
Lower conducting ends under low potential effect.
The compensation principle of the pixel light emission of array substrate shown in Fig. 2 provided in an embodiment of the present invention is carried out below detailed
Explanation:
As shown in Fig. 2, in light emitting phase, control of the second switch transistor M2 in the control signal of control signal end Gate
Lower unlatching, the data-signal of data signal end Data by second switch transistor M2 be transmitted to driving transistor M0 grid and
The grid of first switch transistor M1, driving transistor M0 and first switch transistor M1 are opened under the control of data-signal simultaneously
It opens, the voltage input of power end Vdd has flow through driving transistor M0 at this time to driving transistor M0 and first switch transistor M1
And the electric current for driving luminescent device L1 luminous, the electric current I and the resistance value of photo resistance R for flowing into compensation luminescent device L2 have
It closes；When the brightness of luminescent device L1 is reduced due to device aging etc., photo resistance R received luminescent device L1 at this time
Brightness is also low, and since the resistance value of photo resistance R is inversely proportional with the light received, i.e., received light is stronger, and resistance value is smaller, connects
The light of receipts is weaker, and resistance value is bigger, therefore the corresponding prevention of photo resistance R at this time is larger, due to photo resistance R and second resistance
R2 is in parallel, then connects with first resistor R1, therefore the all-in resistance in pixel-driving circuit 2If power supply
The voltage for holding Vdd is U, the electric current of first resistor R1Flow into the electric current etc. of compensation luminescent device L2
In the electric current of second resistance R2Therefore it flows into
Compensate the electric current of luminescent device L2It can be seen that flow into compensation luminescent device L2 electric current I with
The resistance value of photo resistance R is directly proportional, i.e. the resistance value of photo resistance R is bigger, and the electric current I for flowing into compensation luminescent device L2 is bigger, light
The resistance value of quick resistance R is smaller, and the electric current I for flowing into compensation luminescent device L2 is smaller；Therefore, when luminescent device L1 is due to originals such as agings
Because when light emission luminance being caused to reduce, the resistance value of photo resistance R is larger, then the electric current I for flowing into compensation luminescent device L2 is larger, compensation
The light emission luminance of luminescent device L2 is stronger, can compensate the light emission luminance of luminescent device L1, realizes as caused by device aging
The problem of brightness of image reduces；When the light emission luminance of luminescent device L1 is higher, the resistance value of photo resistance R is then flowed into regard to larger
The electric current I for compensating luminescent device L2 is smaller, then the light emission luminance for compensating luminescent device L2 reduces, therefore photo resistance R can root
The electric current I for flowing into compensation luminescent device L2 is adjusted according to the power of the luminescent device L1 brightness to shine, to realize whole display
The uniformity of picture brightness.Therefore, above-mentioned array substrate provided in an embodiment of the present invention can be improved viewing area in display device
The brightness and uniformity of domain picture.
In the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in figure 3, array substrate packet
The first substrate 10 being oppositely arranged and the second substrate 20 are included, there are multiple pixel units between first substrate 10 and the second substrate 20
(Fig. 3 is by taking a pixel unit as an example), each pixel unit include that the luminous driving of luminescent device L1, driving luminescent device L1 is brilliant
Body pipe M0 compensates luminescent device L2, driving compensation luminescent device luminous first switch transistor M1 and photo resistance R, Fig. 3's
Pixel unit only illustrates driving transistor M0, luminescent device L1, first switch transistor M1, compensation luminescent device L2 and light
Quick resistance R, further includes second switch transistor M2 certainly and well known to a person skilled in the art other functional film layers, the present invention
It is only to schematically illustrate the film layer closely related with inventive point of the invention.Specifically, driving transistor M0 includes being located at first
Active layer 001, gate insulating layer 002, grid 003, interlayer insulating film 004, source electrode 005 and drain electrode 006 on substrate 10, first
Switching transistor M1 includes active layer 001 ', gate insulating layer 002, grid 003 ', layer insulation on first substrate 10
Layer 004, source electrode 005 ' and drain electrode 006 ', luminescent device L1 include being located above driving transistor M0 successively the first of lamination setting
Pole 4, organic function layer 5 and the second pole 6, compensation luminescent device L2 include that successively lamination is set above first switch transistor M1
The first pole 4 ', organic function layer 5 ' and the second pole 6 ' set；The first pole of luminescent device L1 by through passivation layer 7 via hole with
The source electrode 005 of transistor M0 is driven to be connected, the first pole for compensating luminescent device L2 is opened by the via hole through passivation layer 7 with first
The drain electrode 006 ' for closing transistor M1 is connected；Array substrate further includes encapsulating structure 8.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in figure 3, hair
It is separated between optical device L1 and compensation luminescent device L2 using barrier layer 3, compensates the shadow that luminescent device L2 is issued in order to prevent
The resistance value for ringing photo resistance R, i.e., only allow photo resistance R to receive the light that luminescent device L1 is issued, and photo resistance R is arranged the present invention
In the L1 light-emitting surface side of luminescent device, and photo resistance R and compensation luminescent device L2 are on substrate (such as first substrate 10)
Orthographic projection no overlap region；Specifically, photo resistance R can be arranged to positioned at 6 top of the second pole of luminescent device L1, and light
Pass through 9 insulation set of insulating layer between the second pole 6 of quick resistance R and luminescent device L1.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in figure 3, hair
Film layer same layer setting with the same function in optical device L1 and compensation luminescent device L2.Such as by the first pole of luminescent device L1
4 are arranged with the 4 ' same layer of the first pole for compensating luminescent device L2, by the organic function layer 5 of luminescent device L1 and compensation luminescent device L2
The setting of 5 ' same layer of organic function layer, and it is the second pole 6 ' of the second pole 6 of luminescent device L1 and compensation luminescent device L2 is same
Layer setting etc. can form luminescent device L1 by a patterning processes in this way and compensation luminescent device L2 is with the same function
The figure of film layer can simplify preparation process flow, save production cost, improve production efficiency.
In the specific implementation, the first pole 4 of luminescent device L1 and the material of the first pole 4 ' of compensation luminescent device L2 are gold
Belong to material, the second pole 6 of luminescent device L1 and the material of the second pole 6 ' of compensation luminescent device L2 are transparent conductive material, such as
ITO etc..
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, the material of photo resistance
Material may include cadmium sulfide, aluminium sulfide, vulcanized lead, bismuth sulfide or selenium.
Further, in the specific implementation, in order to guarantee that the electric current that first switch transistor is connected is sufficiently large, in the present invention
In the above-mentioned array substrate that embodiment provides, the breadth length ratio of first switch transistor is greater than the breadth length ratio of driving transistor.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, first switch crystal
The breadth length ratio of pipe can be 2 times or 3 times of the breadth length ratio of driving transistor.
Further, in the specific implementation, in above-mentioned array substrate provided in an embodiment of the present invention, as shown in figure 3, the
Film layer same layer setting with the same function in one switching transistor M1, second switch transistor and driving transistor M0.In figure
First switch transistor M1 and driving transistor M0 are only illustrated, such as the grid same layer of these three transistors is arranged, it will
The active layer same layer of these three transistors is arranged, and by the source-drain electrode same layer setting etc. of these three transistors, can lead in this way
A patterning processes are crossed to form first switch transistor, second switch transistor and drive film with the same function in transistor
The figure of layer can simplify preparation process flow, save production cost, improve production efficiency.
It should be noted that in above-mentioned array substrate provided in an embodiment of the present invention, driving transistor and switch crystal
Pipe can be thin film transistor (TFT) (TFT, Thin Film Transistor), be also possible to metal oxide semiconductor field effect tube
(MOS, Metal Oxide Scmiconductor), is not limited thereto.
Based on the same inventive concept, the embodiment of the invention also provides a kind of any of the above-described kind provided in an embodiment of the present invention
The driving method of array substrate, comprising:
When pixel-driving circuit driving luminescent device shines, the light that photo resistance issues the luminescent device received turns
The resistance value that the brightness of the light issued with luminescent device is inversely proportional is changed into, to control the electric current for flowing into compensation luminescent device.
The driving method of array substrate provided in an embodiment of the present invention works as luminescent device when luminescent device carries out luminous
When the brightness of the light issued due to aging etc. is reduced, photo resistance receives the light correspondence that luminescent device issues and is converted to resistance value
Biggish resistance, the biggish photo resistance of resistance value can be such that the electric current for flowing into compensation luminescent device increases by pixel compensation circuit
Greatly, then compensate the brightness enhancing of the light of luminescent device sending, the brightness of light issued to luminescent device compensates, realize due to
The problem of brightness of image caused by device aging reduces；In addition, the driving method of array substrate provided by the invention is to display picture
The uniformity in face also has some improvement, this is because when the brightness for the light that part luminescent device issues is higher, photo resistance
Resistance value just become smaller, the lesser photo resistance of resistance value can be made by pixel compensation circuit flow into compensation luminescent device electric current drop
Low, then the brightness for compensating the light of luminescent device sending reduces, therefore photo resistance can be according to the brightness that luminescent device shines
Power flows into the electric current of compensation luminescent device to adjust, to realize the uniformity of whole display picture brightness.Therefore, of the invention
The above-mentioned array substrate that embodiment provides can be improved the brightness and uniformity of display area picture in display device.
In the specific implementation, the pixel compensation principle of the driving method of above-mentioned array substrate may refer to above-mentioned array substrate
Described in pixel compensation principle, this will not be repeated here.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display panels, comprising: the embodiment of the present invention mentions
Any of the above-described kind of array substrate supplied.The principle that the display panel solves the problems, such as is similar to array substrate above-mentioned, therefore this is aobvious
Show that the implementation of panel may refer to the implementation of above-mentioned array substrate, overlaps will not be repeated.
In the specific implementation, in above-mentioned display panel provided in an embodiment of the present invention, display panel can be Organic Electricity
Photoluminescence display panel.
Based on the same inventive concept, the embodiment of the invention also provides a kind of display devices, including the embodiment of the present invention to mention
The above-mentioned display panel supplied.The display device can be with are as follows: mobile phone, tablet computer, television set, display, laptop, number
Any products or components having a display function such as photo frame, navigator.For other essential compositions of the display device
Part is it will be apparent to an ordinarily skilled person in the art that having, and this will not be repeated here, also should not be used as to of the invention
Limitation.The implementation of the display device may refer to the embodiment of above-mentioned array substrate, and overlaps will not be repeated.
Array substrate, its driving method, display panel and display device provided in an embodiment of the present invention, the array substrate are logical
It crosses and increases compensation luminescent device, and the pixel compensation circuit for driving compensation luminescent device in each pixel unit, and
Pixel compensation circuit includes the photo resistance in parallel with compensation luminescent device；When luminescent device carries out luminous, work as luminescent device
When the brightness of the light issued due to aging etc. is reduced, the brightness that the luminescent device received issues is converted to by photo resistance
The biggish resistance of resistance value, the biggish photo resistance of resistance value can make the electric current for flowing into compensation luminescent device by pixel compensation circuit
Increase, then compensate the brightness enhancing of the light of luminescent device sending, the brightness of light issued to luminescent device compensates, realize by
The problem of brightness of image caused by device aging reduces；In addition, array substrate provided by the invention is to the uniform of display picture
Property also have some improvement, this is because when part luminescent device issue light brightness it is higher when, the resistance value of photo resistance is just
Become smaller, the lesser photo resistance of resistance value can make the current reduction for flowing into compensation luminescent device by pixel compensation circuit, then mend
The brightness for repaying the light of luminescent device sending reduces, therefore photo resistance can be adjusted according to the power of the luminous brightness of luminescent device
The electric current into compensation luminescent device is rectified, to realize the uniformity of whole display picture brightness.Therefore, the embodiment of the present invention mentions
The above-mentioned array substrate supplied can be improved the brightness and uniformity of display area picture in display device.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (15)
1. a kind of array substrate, which is characterized in that including multiple pixel units, each pixel unit includes: luminescent device,
For driving the pixel-driving circuit of the luminescent device, luminescent device is compensated, and for driving the compensation luminescent device
Pixel compensation circuit；Wherein, the pixel compensation circuit includes the photo resistance in parallel with the compensation luminescent device；
When the pixel-driving circuit drives the luminescent device to shine, the photo resistance is used for the hair that will be received
The light that optical device issues is converted into the resistance value that the brightness of the light issued with the luminescent device is inversely proportional, described in control inflow
Compensate the electric current of luminescent device.
2. array substrate as described in claim 1, which is characterized in that the pixel compensation circuit further include: first switch is brilliant
Body pipe and divider resistance；Wherein,
The grid of the first switch transistor is connected with data signal end, the source electrode and power end of the first switch transistor
Be connected, the first end of the drain electrode divider resistance of the first switch transistor is connected, the second end of the divider resistance with
The first of the compensation luminescent device is extremely connected, and the second pole of the compensation luminescent device is connected with ground terminal, the partial pressure electricity
The third end of resistance is connected with the first end of the photo resistance, and the second end of the photo resistance is connected with the ground terminal.
3. array substrate as claimed in claim 2, which is characterized in that the divider resistance includes: first resistor and the second electricity
Resistance；Wherein,
The first end of the first resistor is connected with the drain electrode of the first switch transistor, the second end point of the first resistor
It is not connected with the first end of the first end of the second resistance and the photo resistance；
The second end of the second resistance is extremely connected with the first of the compensation luminescent device.
4. array substrate as claimed in claim 3, which is characterized in that flow into the electric current and the light of the compensation luminescent device
The resistance value of quick resistance meets following formula:
Wherein, I indicates to flow into the electric current of the compensation luminescent device, and U indicates that the voltage of the power end, R1 indicate described first
Resistance, R2 indicate the second resistance, and R indicates the photo resistance.
5. array substrate as described in claim 1, which is characterized in that between the luminescent device and the compensation luminescent device
Separated using barrier layer, the photo resistance is located at the light-emitting surface side of the luminescent device, and the photo resistance with it is described
Compensate orthographic projection no overlap region of the luminescent device on substrate.
6. array substrate as claimed in claim 5, which is characterized in that have in the luminescent device and the compensation luminescent device
There is the film layer same layer of identical function to be arranged.
7. array substrate as described in claim 1, which is characterized in that the material of the photo resistance includes cadmium sulfide, vulcanization
Aluminium, vulcanized lead, bismuth sulfide or selenium.
8. array substrate as claimed in claim 2, which is characterized in that the pixel-driving circuit includes: second switch crystal
Pipe, capacitor and driving transistor；Wherein,
The grid of the second switch transistor is connected with control signal end, the source electrode and the number of the second switch transistor
It is connected according to signal end, the drain electrode of the second switch transistor is connected with the grid of the driving transistor；
The drain electrode of the driving transistor is connected with the power end, the source electrode and the luminescent device of the driving transistor
First is extremely connected, and the second pole of the luminescent device is connected with the ground terminal；
The first end of the capacitor is connected between the drain electrode of the second switch transistor and the grid of the driving transistor,
The second end of the capacitor is connected with the ground terminal.
9. array substrate as claimed in claim 8, which is characterized in that the breadth length ratio of the first switch transistor is greater than described
Drive the breadth length ratio of transistor.
10. array substrate as claimed in claim 9, which is characterized in that the breadth length ratio of the first switch transistor is described
Drive 2 times or 3 times of the breadth length ratio of transistor.
11. array substrate as claimed in claim 8, which is characterized in that the first switch transistor and the driving crystal
Pipe is N-type transistor or is P-type transistor.
12. array substrate as claimed in claim 8, which is characterized in that the first switch transistor, the second switch are brilliant
Film layer same layer setting with the same function in body pipe and the driving transistor.
13. a kind of display panel, which is characterized in that including such as described in any item array substrates of claim 1-12.
14. a kind of display device, which is characterized in that including display panel as claimed in claim 13.
15. a kind of driving method of such as described in any item array substrates of claim 1-12 characterized by comprising
When the pixel-driving circuit drives the luminescent device to shine, the photophore that the photo resistance will receive
The light that part issues is converted into the resistance value that the brightness of the light issued with the luminescent device is inversely proportional, and flows into the compensation with control
The electric current of luminescent device.
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