CN109873012A - A kind of organic LED display panel and display device - Google Patents
A kind of organic LED display panel and display device Download PDFInfo
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- CN109873012A CN109873012A CN201711250381.9A CN201711250381A CN109873012A CN 109873012 A CN109873012 A CN 109873012A CN 201711250381 A CN201711250381 A CN 201711250381A CN 109873012 A CN109873012 A CN 109873012A
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Abstract
The invention discloses a kind of organic LED display panel and display devices, for improving low color range color offset phenomenon, the display panel includes: underlay substrate, viewing area and the non-display area around viewing area, and viewing area includes the multiple sub-pixels being arranged in array on underlay substrate；Including first sub-pixel and second sub-pixel, the bright voltage of the first sub-pixel is higher than the bright voltage of the second sub-pixel；Viewing area further includes hole injection layer and the first conductive member, first conductive member is between underlay substrate and hole injection layer, and it is connect with hole injection layer, first conductive member extends to the edge of viewing area, and connect with the first potential end, the current potential of the first potential end is lower than the current potential of the anode of the first sub-pixel.In low color range, negative pressure can be flowed to by flowing to when the one part of current of the electric current of the first sub-pixel passes through hole injection layer, thus will not crossfire to the second sub-pixel, avoid the second sub-pixel by crossfire and light brought colour cast.
Description
Technical field
The present invention relates to technical field of display panel more particularly to a kind of organic LED display panel and display dresses
It sets.
Background technique
When AMOLED display screen has low-power consumption, high contrast, wide colour gamut, wide viewing angle, wide operating temperature range, response
Between it is fast and many advantages, such as can be made foldable, rollable flexible form, therefore OLED display screen is considered as after LCD
Next-generation display screen afterwards.But it is to be solved to still have many technical problems at present, such as in low ash rank Shi Baiguang or list
Colour cast occurs for the color of coloured light, and display color is caused to be distorted.
Low ash rank colour cast is problem common in display panel.Specifically, in Organic Light Emitting Diode (Organic
Light-Emitting Diode, OLED) in device, as shown in Figure 1a, red sub-pixel, green sub-pixels, blue subpixels
Bright voltage have differences, the bright voltage of blue subpixels is higher, and red and green sub-pixels bright voltages are lower.Such as
Shown in Fig. 1 b, when the voltage of the application of the anode of blue subpixels is greater than or equal to the bright voltage of blue subpixels, blue
The hole of the hole injection layer of sub-pixel can flow to blue luminescent layer B, since the carrier mobility of hole injection layer is very high,
It has partial holes and flows to green light emitting layer G and red light emitting layer R through hole injection layer, due to red sub-pixel and the sub- picture of green
The bright voltage of element is lower, can may light slightly red sub-pixel and green sub-pixels at this time.This makes display panel exist
It will appear a degree of color distortion when lower grayscale, this phenomenon is referred to as low ash rank colour cast.
Pass through the methods of the electron mobility of reduction hole injection layer and thinned hole injection layer thickness in the prior art
The generation of low ash rank colour cast is avoided, although limiting son simultaneously however, these methods can improve low ash rank colour cast problem
The working performance of pixel.
To sum up, lack in the prior art improves low ash rank colour cast problem on the basis of not reducing sub-pixel working performance
Implementation.
Summary of the invention
The present invention provides a kind of organic LED display panel and display device, is not reducing sub-pixel to realize
Low ash rank color offset phenomenon is avoided on the basis of working performance.
The embodiment of the present invention provides a kind of Organic Light Emitting Diode OLED display panel, comprising: underlay substrate, viewing area and
Non-display area around the viewing area, the viewing area include the multiple sub- pictures being arranged in array on the underlay substrate
Element；Wherein, the multiple sub-pixel includes first sub-pixel and second sub-pixel, and the bright voltage of first sub-pixel is higher than
The bright voltage of second sub-pixel；The viewing area further includes hole injection layer, and the hole injection layer is located at described more
Between the anode and cathode of a sub-pixel；The viewing area further includes the first conductive member, and first conductive member is between institute
It states between underlay substrate and the hole injection layer, and is connect with the hole injection layer, first conductive member extends to
The edge of the viewing area, and being connect with the first potential end, first potential end be first conductive member with it is described non-
The node that crosses of the voltage signal line of viewing area, the current potential of first potential end are lower than the electricity of the anode of first sub-pixel
Position.
Optionally, the anode of the anode and second sub-pixel of first conductive member and first sub-pixel is all
It does not overlap.
Optionally, first conductive member and the anode same layer of first sub-pixel are arranged.
Optionally, first conductive member is conducting wire or metal electrode.
Optionally, the current potential of first potential end is negative potential.
Optionally, first potential end is electrically connected with the cathode of second sub-pixel；Or first potential end with
The initialization voltage signal of the OLED display panel is electrically connected.
Optionally, first sub-pixel and second sub-pixel belong to same pixel unit；Positioned at each of same row
Pixel unit shares first conductive member.
Optionally, first conductive member is strip.
Optionally, first conductive member is still around the first sub-pixel setting.
It optionally, further include the third sub-pixel for belonging to same pixel unit；The bright voltage of first sub-pixel is high
In the bright voltage of the third sub-pixel；It further include the second conduction device, second conductive member one end and the hole
Implanted layer connection, the other end of second conductive member are electrically connected with the second potential end, and the current potential of second potential end is low
In the current potential of the anode of first sub-pixel.
Optionally, the anode of second conductive member and first sub-pixel, the anode of second sub-pixel and
The anode of the third sub-pixel does not overlap.
The embodiment of the present invention provides a kind of display device, including display panel described in any embodiment item.
In the embodiment of the present invention, the effect of the first conductive member is to provide one between the first sub-pixel and the second sub-pixel
A negative pressure route, the negative pressure route provide negative voltage.It is negative due to having between first sub-pixel and second sub-pixel in low color range
Pressure exists, so that the one part of current for flowing to the electric current of the first sub-pixel is negative by hole injection layer Shi Huijing negative pressure route flow direction
Pressure, so that this portion of electrical current crossfire will not be made to the second sub-pixel, and then avoids the second sub-pixel and is lighted by this part crossfire
Brought colour cast.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly introduced, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without any creative labor, it can also be obtained according to these attached drawings
His attached drawing.
Fig. 1 a is the driving voltage of the sub-pixel of different colours and the relation curve of brightness；
Fig. 1 b is the theory structure schematic diagram that colour cast is generated in oled panel；
Fig. 1 c is the electrical block diagram of blue, green and red sub-pixel in pixel unit；
Fig. 1 d is that the driving current crossfire of blue subpixels in pixel unit generates the circuit knot of colour cast to red sub-pixel
Structure schematic diagram；
Fig. 2 is a kind of electrical block diagram for avoiding generating colour cast provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of pixel unit provided in an embodiment of the present invention；
Fig. 4 is the electrical block diagram that another kind provided in an embodiment of the present invention avoids generating colour cast；
Fig. 5 is the electrical block diagram that another kind provided in an embodiment of the present invention avoids generating colour cast；
Fig. 6 is a kind of arrangement figure of first conductive member provided in an embodiment of the present invention；
Fig. 7 is the arrangement figure of another first conductive member provided in an embodiment of the present invention.
Specific embodiment
To make the above purposes, features and advantages of the invention more obvious and understandable, below in conjunction with attached drawing and implementation
The present invention will be further described for example.However, example embodiment can be implemented in a variety of forms, and it is not understood as limited to
Embodiment set forth herein；On the contrary, these embodiments are provided so that the present invention more comprehensively and completely, and by example embodiment party
The design of formula is comprehensively communicated to those skilled in the art.Identical appended drawing reference indicates same or similar knot in figure
Structure, thus repetition thereof will be omitted.The word of expression position and direction described in the present invention, is to be with attached drawing
The explanation that example carries out, but can also make a change as needed, done change is all contained in the scope of the present invention.The present invention
Attached drawing be only used for signal relative positional relationship, the thickness at certain positions uses the plotting mode lavished praise on oneself in order to understand, attached
Thickness in figure does not represent the proportionate relationship of practical thickness.
It should be noted that elaborating detail in the following description to fully understand the present invention.But this hair
Bright to be different from other way described herein with a variety of and be implemented, those skilled in the art can be without prejudice in the present invention
Similar popularization is done in the case where culvert.Therefore the present invention is not limited by following public specific embodiment.Such as in specification and
Some vocabulary has been used in claim to censure specific components.Those skilled in the art should understand that hardware manufacturer can
The same component can be called with different nouns.This specification and claims are not with the difference of title as differentiation group
The mode of part, but with the difference of component functionally as the criterion of differentiation.Such as in the whole text, specification and claim are worked as
Mentioned in "comprising" be an open language, therefore should be construed to " including but not limited to ".Specification subsequent descriptions are real
The better embodiment of the application is applied, so the description is being not limited to for the purpose of the rule for illustrating the application
Scope of the present application.The protection scope of the application is as defined by the appended claims.
Before introducing the present invention and avoiding the solution of low ash rank color offset phenomenon, illustrated under low gray scale voltage first
Colour cast problem, the most common colour cast is red colour cast.
Display is all correctly to show image by different grayscale at present, generally there is 256 grayscale (0-255), low ash
Rank refers to the lesser grayscale of numeric ratio, conversely, the bigger grayscale of numerical value is higher.The corresponding 256 different brightness of 256 grayscale, ash
Rank more high brightness is bigger.
Under low ash rank, the overall brightness and red of OLED display panel, green, blue subpixels brightness such as 1 institute of table
To show, brightness of the OLED display panel in low ash rank is very low, if the corresponding brightness of 255 grayscale is 250nits, when 20 grayscale,
The brightness of OLED display panel is only 0.94nits, it is contemplated that the factors such as pixel aperture ratio and the transmitance of polaroid, red,
The brightness of green, blue subpixels is respectively 11.47nits, 34.59nits and 2.92nits.With the reduction of grayscale, OLED
The brightness of the overall brightness and red, green, blue subpixels of display panel all gradually decreases.
A kind of situation that red color offset phenomenon occurs is as follows: under low ash rank, although the overall brightness of OLED display panel
It is very low, but also it is easy to appear red color offset phenomenons.This is because working as OLED since the cross-pressure between ELVDD and ELVSS is 7.1V
Display panel is in display low-light level, when such as 1nits, although brightness is lower, in OLED display panel there are still it is certain across
Pressure, such as 7.1V, as illustrated in figure 1 c, this cross-pressure are the voltage for being added in switching transistor TFT Yu the both ends OLED, are come to a panel
It says, this cross-pressure is usually a fixed value, the bright voltage and sub-pixel of sub-pixel little with the bright voltage relationship of sub-pixel
Emitting layer material it is related.Under this cross-pressure, the red (R) of OLED display panel, in blue (B) sub-pixel, is risen green (G)
The minimum sub-pixel of bright voltage can be lighted at first, and since the band gap of red light material is smaller, bright voltage is minimum, therefore red son
Pixel can be lit at first under normal circumstances, if the brightness of R, G, B sub-pixel be not in be mixed into white light ratio (R:
29.7%；G:60.9%；B:9.4% it) mixes, then the light being mixed to get just is not white light, and colour cast, general feelings can thus occur
Red color offset phenomenon can occur under condition.
Another situation that red color offset phenomenon occurs is as follows: in OLED device, R, G, B sub-pixel three's plays bright electricity
Pressure be it is inconsistent, it is related with the band gap width of the emitting layer material of R, G, B sub-pixel.As shown in Figure 1a, typically
The bright voltage of blue subpixels about 2.7V, the bright voltage of green sub-pixels are about 2V, and the bright voltage of red sub-pixel is about
For 1.7V.In the case where blue subpixels are lighted, although lighting the voltage of blue subpixels mainly across on blue subpixels,
But as shown in Figure 1 b, the electric conductivity of the hole injection layer (HIL layers) shared due to R, G, B sub-pixel three is preferable,
As illustrated in figure 1 c, this portion voltage can be applied in green sub-pixels and red sub-pixel by HIL layers, due to red son
The bright voltage of pixel is lower, when little by the voltage drop of HIL, even if having lost a part of voltage, but such as Fig. 1 d institute
Show, remaining voltage can still excite red emission, thus in low ash rank, emitting red light brightness cannot be in strict accordance with
Our requirement reaches low-light level effect, to low ash rank colour cast (partially red) phenomenon occur.
Table 1
In order to avoid red color offset phenomenon, red sub-pixel of the present invention in original TFT circuit and blue subpixels it
Between increase a negative voltage.In low-light level, when the electric current of blue subpixels to be flowed to has part will be by HIL layers of crossfire to red
When sub-pixels, since, with the presence of negative pressure, and its line impedance is smaller between red basket, this part crossfire will be toward the line of negative pressure
Road flows to negative pressure, thus will not crossfire cause to red sub-pixel it is red shinny.Low ash rank colour cast can be thus fully solved
The problem of.
The present invention provides a kind of OLED display panel, including underlay substrate, viewing area and the non-display area around viewing area,
Viewing area includes the multiple sub-pixels being arranged in array on underlay substrate；Wherein, multiple sub-pixels include the first sub-pixel and
Second sub-pixel, the bright voltage of the first sub-pixel are higher than the bright voltage of the second sub-pixel；Viewing area further includes hole injection
Layer (dotted portion in Fig. 2), hole injection layer are located between the anode and cathode of multiple sub-pixels；Viewing area further includes first
Conductive member, the first conductive member are connect between underlay substrate and hole injection layer, and with hole injection layer, the first conducting
Component extends to the edge of viewing area, and connect with the first potential end, and the first potential end is the first conductive member and non-display area
Voltage signal line the node that crosses, the current potential of the current potential of the first potential end lower than the anode of the first sub-pixel.
In the embodiment of the present invention, the effect of the first conductive member is to provide one between the first sub-pixel and the second sub-pixel
A negative pressure route, the negative pressure route provide negative voltage.It is low-light level in the brightness of OLED display panel, and flows to the first sub-pixel
Electric current one part of current will by hole injection layer crossfire to the second sub-pixel when, due to the first sub-pixel and the second sub- picture
With the presence of negative pressure between element, and the line impedance of the first conductive member is smaller, this part crossfire will be flowed to through negative pressure route
Negative pressure, thus will not crossfire to the second sub-pixel, and then avoid the electric current crossfire of the first sub-pixel to the second sub-pixel and band
The colour cast come.
Optionally, first sub-pixel is blue subpixels, and second sub-pixel is red sub-pixel.
Optionally, first sub-pixel and second sub-pixel belong to same pixel unit.
Optionally, the first conductive member can be the metal electrode of conducting wire or strip.
Optionally, the first potential end can be the ELVSS voltage signal line of the first conductive member and OLED display panel
The node of intersection, at this point, the current potential of first potential end is negative potential, because apply on ELVSS voltage signal line
ELVSS voltage signal is negative voltage, such as -2.4V.
For example, ELVSS voltage is believed as shown in Fig. 2, ELVSS voltage signal line is electrically connected with the cathode of OLED display panel
It number is negative voltage signal, such as -2.4V.When first conductive member is continuous conducting wire or electrode, one end can pass through contact hole
It is electrically connected with hole injection layer, the other end extends to the periphery of OLED display panel, and the ELVSS voltage signal line electricity with periphery
Connection, the node of electrical connection are the first potential end.
In circuit shown in Fig. 2, the effect of the first conductive member is mentioned between red sub-pixel and blue subpixels
For a negative pressure route, the negative voltage which provides is ELVSS.It is low-light level in the brightness of OLED display panel, and
Flow to the electric current of blue subpixels one part of current Icross-talk will by HIL crossfire to red sub-pixel when, due to red
With the presence of negative pressure ELVSS between sub-pixels and blue subpixels, and the line impedance of the first conductive member is smaller, this part
Crossfire Icross-talk will flow to negative pressure ELVSS through negative pressure route, thus will not crossfire cause to excite to red sub-pixel it is red
Light, the problem of being thus fully solved low ash rank colour cast.In addition, in the longitudinal direction due to the thickness of R-OLED device and impedance
All than much smaller in transverse direction, therefore, the electric current I being applied on the anode of red sub-pixelTFT leakage currentOr R-OLED can be flowed to
Device, without flowing to cathode by negative pressure route.
In order to clearly illustrate the anode of hole injection layer and the first sub-pixel, as shown in figure 3, being located at same pixel unit
Blue subpixels, in red sub-pixel and green sub-pixels, the film layer of blue subpixels covering successively includes: first switch crystalline substance
Body pipe T1, the anode (anode 1 in Fig. 3) of blue subpixels, hole injection layer, hole transmission layer, blue light-emitting layer are (in Fig. 3
B), electron transfer layer and cathode, first switch transistor T1 are electrically connected with anode 1.The film layer structure packet of red sub-pixel covering
It includes: anode (anode 2 in Fig. 3), the hole injection layer, hole transmission layer, red of second switch transistor T2, red sub-pixel
Luminescent layer (R in Fig. 3), electron transfer layer and cathode, second switch transistor T2 are electrically connected with anode 2.Green sub-pixels are covered
The film layer structure of lid include: third switching transistor T3, the anode (anode 3 in Fig. 3) of green sub-pixels, hole injection layer,
Hole transmission layer, green light emitting layer (G in Fig. 3), electron transfer layer and cathode, third switching transistor T3 are electrically connected with anode 3
It connects.It should be noted that Fig. 3 only simply illustrates the relationship between the film layer structure of different subpixel, film layer is not represented
Actual structure feature, the actual structure feature of film layer are answered same as the prior art, and and will not be described here in detail.
From figure 3, it can be seen that hole injection layer and hole transmission layer, electron transfer layer and cathode are all by blue son
Pixel, red sub-pixel and green sub-pixels share.And blue light-emitting layer (B), red light emitting layer (R) and green light emitting layer
(G) same layer is arranged, but is separated each other by insulating layer or dielectric layer (also referred to as pixel defining layer).It is the anode of blue subpixels, red
The anode of sub-pixels and anode (i.e. anode 1, anode 2 and anode 3) the same layer setting of green sub-pixels, but insulated each other
Layer or dielectric layer separate.First switch transistor T1, second switch transistor T2 and the setting of third switching transistor T3 same layer, but
It is separated each other by insulating layer or dielectric layer.
Optionally, when the first conductive member can be the strip shaped electric poles of conducting wire or similar conducting wire, the first potential end may be used also
Be the first conductive member and OLED display panel initialization voltage signal wire intersection node, at this point, described first
The current potential of potential end is also negative potential, because the initialization voltage signal Vint applied on initialization voltage signal wire can be negative
Voltage, such as -3.0V.
For example, as shown in figure 4, the first of initialization voltage signal wire and the 4th switching transistor T4 of OLED display panel
Electrode electrical connection, the voltage initialization for the 4th switching transistor T4 to be written are Vint.The of 4th switching transistor T4
Two electrodes are electrically connected with the anode of red sub-pixel, wherein first electrode is source electrode, and second electrode is drain electrode or the first electricity
It extremely drains, second electrode is source electrode.When first conductive member is continuous conducting wire or electrode, one end can pass through contact hole
It is electrically connected with hole injection layer, the other end extends to the periphery of OLED display panel, and the initialization voltage signal wire with periphery
Electrical connection, the node of electrical connection is the first potential end, so that the voltage signal of the first potential end is negative voltage Vint.
In circuit shown in Fig. 4, the effect of the first conductive member is mentioned between red sub-pixel and blue subpixels
For a negative voltage route, the negative voltage which provides is Vint.It is low-light level in the brightness of OLED display panel, and
Flow to blue subpixels electric current have part (Icross-talk) will by HIL crossfire to red sub-pixel when, due to red
With the presence of negative pressure between sub-pixel and blue subpixels, and the line impedance of the first conductive member is smaller, this part crossfire
Icross-talk will flow to negative pressure Vint toward negative pressure route, thus will not crossfire to red sub-pixel lead to excitation feux rouges, this
Sample can be fully solved the problem of low ash rank colour cast.In addition, since the thickness of R-OLED device and impedance are all compared in the longitudinal direction
It is much smaller in transverse direction, therefore, the main electrical current electric current I being applied in the R-OLED device anode of red sub-pixelTFT leakage currentAlso
It is that can flow to R-OLED device, causes to leak electricity without flowing to Vint by negative pressure route.
Optionally, the anode same layer of first conductive member and each sub-pixel is arranged, and the first conductive member with
The anode of each sub-pixel does not overlap.As shown in figure 3, the first conductive member is produced between anode 1 and anode 2.Optionally, exist
When making the first conductive member, same light shield can be used with the anode of three sub-pixels of RGB, with each sub-pixel
Anode makes together.The first conductive member produced is respectively between the anode of red sub-pixel and the anode of blue subpixels
Mutually insulated can be filled therebetween by insulating layer or dielectric layer.
Optionally, it on the basis of the anode of each sub-pixel and the first conductive member be not overlapping, is led to simplify first
The manufacture craft of logical component, a kind of arrangement of the first conductive member can be found in Fig. 6, and the first conductive member is strip, strip
The first conductive member through same row pixel unit and extend to the periphery of panel, connect with ELVSS voltage signal line.Position
The first conductive member of the strip can be shared in each pixel unit of same row.Wherein, each pixel unit includes blue
Pixel, red sub-pixel and green sub-pixels, in each pixel unit, blue subpixels are arranged in the one of the first conductive member
Side, red sub-pixel and green sub-pixels are arranged in the other side of the first conductive member, and effect is to light blue subpixels
When, crossfire can be blocked to the electric current of red sub-pixel or green sub-pixels in same pixel unit.
Optionally, on the basis of the anode of each sub-pixel and the first conductive member be not overlapping, the first conductive member exists
A kind of arrangement on anode layer can be found in Fig. 7, and the first conductive member is also strip, and the first conductive member of strip is in addition to passing through
It wears the pixel unit of same row and extends to the periphery of panel and be still around except being connect with ELVSS voltage signal line in each indigo plant
The surrounding of sub-pixels, effect is, when lighting blue subpixels, crossfire can be blocked to red sub-pixel from all directions
Or the electric current of green sub-pixels.
Wherein, R, G, B sub-pixel position in Fig. 6 and Fig. 7 are also position corresponding to the anode of R, G, B sub-pixel
It sets, therefore, the figure in Fig. 6 and Fig. 7 other than ELVSS signal wire can be used as the exposure mask when anode of production sub-pixel
Figure.
Optionally, in above-described embodiment, in order to avoid blue subpixels electric current crossfire to green sub-pixels, described second
Sub-pixel also could alternatively be green sub-pixels.
Further, in order to avoid red colour cast and green colour cast simultaneously, as shown in figure 5, the application provides a kind of OLED
Display panel, the first sub-pixel, the second sub-pixel and third sub-pixel including belonging to same pixel unit, the first sub- picture
The bright voltage of element is higher than the bright voltage of second sub-pixel and the third sub-pixel；Further include the first conductive member and
The hole injection layer of second conductive member, one end of first conductive member and OLED display panel connects, the other end and the
The connection of one potential end, the current potential of first potential end are lower than the current potential of the anode of first sub-pixel；Second conducting
Component one end is connect with the hole injection layer of the luminescent device of first sub-pixel, the other end of second conductive member with
The electrical connection of second potential end, the current potential of second potential end are lower than the current potential of the anode of first sub-pixel.
Optionally, first sub-pixel is blue subpixels, and second sub-pixel is red sub-pixel, the third
Sub-pixel is blue subpixels.
Optionally, the current potential of the second potential end is negative voltage, and negative voltage is the ELVSS or Vint in above-described embodiment.
Optionally, first conductive member, second conductive member are not overlapped with the anode of pixel unit, i.e., with
The anode of the anode of first sub-pixel, the anode of second sub-pixel and the third sub-pixel does not overlap.Wherein,
The particular content of first conductive member is not repeated herein referring to previous embodiment.
Optionally, the anode same layer of second conductive member and each sub-pixel is arranged, and the second conductive member with
The anode of each sub-pixel does not overlap.As shown in figure 3, the second conductive member is produced between anode 1 and anode 3.Optionally, exist
When making the second conductive member, same light shield can be used with the anode of three sub-pixels of RGB, with each sub-pixel
Anode makes together.The second conductive member produced is respectively between the anode of red sub-pixel and the anode of blue subpixels
Mutually insulated can be filled therebetween by insulating layer or dielectric layer.
In this embodiment, the second conductive member is the strip shaped electric poles of conducting wire or similar conducting wire, and arrangement figure is similar to Fig. 6
Or arrangement mode illustrated in Figure 7.
In the embodiment of the present invention, the effect of the first conductive member is to provide one between the first sub-pixel and the second sub-pixel
A negative pressure route, the negative pressure route provide negative voltage.It is low-light level in the brightness of OLED display panel, and flows to the first sub-pixel
Electric current one part of current will by hole injection layer crossfire to the second sub-pixel when, due to the first sub-pixel and the second sub- picture
With the presence of negative pressure between element, and the line impedance of the first conductive member is smaller, this part crossfire will be flowed to through negative pressure route
Negative pressure, thus will not crossfire to the second sub-pixel, and then avoid the electric current of the first sub-pixel through hole injection layer crossfire to
Two sub-pixels and bring colour cast.The effect of second conductive member is that one is provided between the first sub-pixel and third sub-pixel
Negative pressure route, the negative pressure route provide negative voltage.It is low-light level in the brightness of OLED display panel, and flows to the first sub-pixel
The one part of current of electric current will by hole injection layer crossfire to third sub-pixel when, due to the first sub-pixel and third sub-pixel
Between with the presence of negative pressure, and the line impedance of the first conductive member is smaller, this part crossfire will flow to negative through negative pressure route
Pressure, thus will not crossfire to third sub-pixel, and then avoid the electric current of the first sub-pixel through hole injection layer crossfire to third
Sub-pixel and bring colour cast, the problem of being thus fully solved low ash rank colour cast.
The embodiment of the present invention also provides a kind of display device, which includes any one in above-described embodiment
OLED display panel.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
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 (12)
1. a kind of Organic Light Emitting Diode OLED display panel characterized by comprising underlay substrate, viewing area and surround institute
The non-display area of viewing area is stated, the viewing area includes the multiple sub-pixels being arranged in array on the underlay substrate；
Wherein, the multiple sub-pixel includes first sub-pixel and second sub-pixel, and the bright voltage of first sub-pixel is high
In the bright voltage of second sub-pixel；
The viewing area further includes hole injection layer, the hole injection layer be located at the multiple sub-pixel anode and cathode it
Between；
The viewing area further includes the first conductive member, and first conductive member is infused between the underlay substrate and the hole
Enter between layer, and connect with the hole injection layer, first conductive member extends to the edge of the viewing area, and with
The connection of one potential end, first potential end are crossing for first conductive member and the voltage signal line of the non-display area
Node, the current potential of first potential end are lower than the current potential of the anode of first sub-pixel.
2. OLED display panel according to claim 1, which is characterized in that first conductive member and first son
The anode of the anode of pixel and second sub-pixel does not overlap.
3. OLED display panel according to claim 1, which is characterized in that first conductive member and first son
The anode same layer of pixel is arranged.
4. OLED display panel according to claim 1, which is characterized in that first conductive member is conducting wire or metal
Electrode.
5. OLED display panel according to claim 1, which is characterized in that the current potential of first potential end is negative electricity
Position.
6. OLED display panel according to claim 5, which is characterized in that first potential end and the described second sub- picture
The cathode electrical connection of element；Or
First potential end is electrically connected with the initialization voltage signal wire of the OLED display panel.
7. OLED display panel according to any one of claims 1 to 6, which is characterized in that first sub-pixel and institute
It states the second sub-pixel and belongs to same pixel unit；
First conductive member is shared positioned at each pixel unit of same row.
8. OLED display panel according to claim 7, which is characterized in that first conductive member is strip.
9. OLED display panel according to claim 7, which is characterized in that first conductive member is still around described
The setting of one sub-pixel.
10. OLED display panel according to claim 7, which is characterized in that further include belong to same pixel unit
Three sub-pixels；The bright voltage of first sub-pixel is higher than the bright voltage of the third sub-pixel；
It further include the second conduction device, second conductive member one end is connect with the hole injection layer, second conducting
The other end of component is electrically connected with the second potential end, and the current potential of second potential end is lower than the anode of first sub-pixel
Current potential.
11. OLED display panel according to claim 10, which is characterized in that second conductive member and described first
The anode of the anode of sub-pixel, the anode of second sub-pixel and the third sub-pixel does not overlap.
12. a kind of display device, which is characterized in that including the display panel as described in any one of claims 1 to 11.
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| CN201711250381.9A CN109873012A (en) | 2017-12-01 | 2017-12-01 | A kind of organic LED display panel and display device |
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| CN201711250381.9A CN109873012A (en) | 2017-12-01 | 2017-12-01 | A kind of organic LED display panel and display device |
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| CN109873012A true CN109873012A (en) | 2019-06-11 |
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| CN201711250381.9A Pending CN109873012A (en) | 2017-12-01 | 2017-12-01 | A kind of organic LED display panel and display device |
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| CN111833810A (en) * | 2020-07-29 | 2020-10-27 | 云谷（固安）科技有限公司 | Display panel driving method and device and display panel |
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