CN111463254B - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN111463254B CN111463254B CN202010365732.6A CN202010365732A CN111463254B CN 111463254 B CN111463254 B CN 111463254B CN 202010365732 A CN202010365732 A CN 202010365732A CN 111463254 B CN111463254 B CN 111463254B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/131—Interconnections, e.g. wiring lines or terminals
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0242—Compensation of deficiencies in the appearance of colours
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0606—Manual adjustment
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- Microelectronics & Electronic Packaging (AREA)
- Electroluminescent Light Sources (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The embodiment of the invention provides a display panel and a display device, relates to the technical field of display, and aims to improve the split screen phenomenon. The display panel includes: the display area is provided with sub-pixels; a reference bus; the reference signal lines are connected with the sub-pixels, and at least part of the reference signal lines are connected with the reference bus through a load compensation structure; the load compensation structure comprises a load compensation wire connected with the reference bus, a signal transmission wire connected with the reference signal wire, and at least two switches connected between the load compensation wire and the signal transmission wire; the reference signal line comprises a first reference line and a second reference line, the first reference line is smaller than the second reference line in length, the equivalent load of the load compensation routing and the signal transmission routing which are connected through the switch in the load compensation structure connected by the first reference line is LA1, the equivalent load of the load compensation routing and the signal transmission routing which are connected through the switch in the load compensation structure connected by the second reference line is LA2, and LA1 is greater than LA 2.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of display, in particular to a display panel and a display device.
[ background of the invention ]
In the display technology, an Organic Light Emitting Diode (OLED) display panel is widely used because of its advantages of fast response speed, wide viewing angle, high brightness, low power consumption, and the like.
And a plurality of reference signal lines electrically connected with the sub-pixels are arranged in the display area of the OLED display panel and used for providing reference signals for the sub-pixels so as to reset the grid electrodes of the driving transistors and the anodes of the light emitting diodes in the sub-pixels. However, for the display panel with the special shape, due to the limitation of the shape of the display panel, the lengths of the reference signal lines arranged in the display panel are different, and the corresponding loads are also different, which causes different attenuation degrees of the reference signals when the reference signals are transmitted on different reference signal lines, so that the reset degrees of the sub-pixels electrically connected with different reference signal lines are different, and further causes the difference of the light emitting brightness of the sub-pixels, the screen splitting phenomenon of the picture displayed by the display panel occurs, and the display performance of the display panel is affected.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a display panel and a display device, which effectively improve the split-screen phenomenon and improve the display performance of the display panel.
In one aspect, an embodiment of the present invention provides a display panel, including:
the display device comprises a display area and a non-display area surrounding the display area, wherein sub-pixels are arranged in the display area;
the reference bus is arranged in the non-display area;
the reference signal lines are arranged in the display area, electrically connected with the sub-pixels, and at least part of the reference signal lines are electrically connected with the reference bus through a load compensation structure; the load compensation structure comprises a load compensation wire, a signal transmission wire and at least two switches, wherein the load compensation wire is electrically connected with the reference bus, the signal transmission wire is electrically connected with the reference signal wire, and the switches are electrically connected between the load compensation wire and the signal transmission wire;
the reference signal line comprises a first reference line and a second reference line, the length of the first reference line is smaller than that of the second reference line, in the load compensation structure electrically connected with the first reference line, the equivalent load of the load compensation trace and the signal transmission trace electrically connected through the switch is LA1, in the load compensation structure electrically connected with the second reference line, the equivalent load of the load compensation trace and the signal transmission trace electrically connected through the switch is LA2, and LA1 is greater than LA 2.
In another aspect, an embodiment of the present invention provides a display device, including the display panel described above.
One of the above technical solutions has the following beneficial effects:
in the technical solution provided in the embodiment of the present invention, at least a part of the reference signal lines is electrically connected to the reference bus through the load compensation structure, so that the load of the part of the reference signal lines can be compensated by the load compensation structure, and further, the equivalent loads of the load compensation structures electrically connected to the reference signal lines with different lengths are different, and the reference signal lines with different lengths can be compensated to different degrees. Specifically, the length of the first reference line is small, so that the load of the first reference line is small, and the first reference line can be subjected to load compensation to a large extent by setting the equivalent load of the load compensation structure electrically connected with the first reference line to be large; the length of the second reference line is small, so that the load of the second reference line is large, and the second reference line can be subjected to load compensation to a small degree by setting the equivalent load of the load compensation structure electrically connected with the second reference line to be large. Therefore, the load compensation structure is utilized to carry out load compensation on the first reference line and the second reference line, the load difference with other reference signal lines is reduced, and simultaneously, the loads of the compensated first reference line and the compensated second reference line tend to be consistent, so that the loads of the reference signal lines in the display panel tend to be consistent, the attenuation degree difference of the reference signals during transmission on different reference signal lines is reduced, the uniformity of the reset degrees of the sub-pixels in different display areas is improved, the uniformity of the luminous brightness of the sub-pixels in different display areas is improved, the screen splitting phenomenon is effectively improved, and the display performance is improved.
In addition, if the load of the reference signal line is compensated by only one compensation line, when the load of the compensation line itself varies due to process errors and the like, inaccuracy in load compensation may be caused. By adopting the load compensation structure provided by the embodiment of the invention, the load compensation degree of the load compensation structure is adjusted through the on-off of the switch, the compensation mode is more flexible, and the accuracy of load compensation can be improved.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a pixel circuit in the prior art;
FIG. 2 is a schematic diagram of an expanded structure of a display panel in the prior art;
fig. 3 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
fig. 4 is a schematic view of an expanded structure of a display panel according to an embodiment of the present invention;
FIG. 5 is an enlarged partial schematic view of FIG. 4;
fig. 6 is a schematic structural diagram of a load compensation structure according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a display panel according to an embodiment of the invention;
fig. 8 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another load compensation structure according to an embodiment of the present invention;
fig. 10 is a schematic diagram of a film structure of a display panel according to an embodiment of the invention;
fig. 11 is a schematic view of another film structure of a display panel according to an embodiment of the invention;
FIG. 12 is a schematic diagram of another load compensation structure according to an embodiment of the present invention;
FIG. 13 is a schematic diagram of another load compensation structure according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In order to more clearly illustrate the technical solutions of the prior art and the embodiments of the present invention, the present invention first describes the technical background:
as shown in fig. 1, fig. 1 is a schematic structural diagram of a pixel circuit in the prior art, the pixel circuit includes a first transistor T1-a seventh transistor T7, wherein a first pole of the fifth transistor T5 and a first pole of the seventh transistor T7 are respectively connected to a reference signal line Vref.
The drive cycle of the pixel circuit includes a reset period, a data write period, and a light emission period:
in the reset period, the fifth transistor T5 and the seventh transistor T7 are turned on by the low level supplied from the first Scan line Scan1, and the gate of the third transistor T3 (i.e., the gate of the driving transistor) and the anode of the light emitting diode D are reset by the reference signal supplied from the reference signal line Vref.
In the data write period, the second transistor T2 and the fourth transistor T4 are in the second scanThe line Scan2 is turned on by the low level, the Data signal provided by the Data line Data is written into the gate of the third transistor T3, and the threshold voltage V of the third transistor T3 is setthAnd (5) grabbing.
In the light emitting period, the first transistor T1 and the sixth transistor T6 are turned on by the low level supplied from the light emission control signal line Emit, and the light emitting diode D emits light by the driving current converted by the data signal and the power supply signal line PVDD.
Based on the above description, in the prior art, the lengths of the reference signal lines disposed in the display panel are different under the influence of factors such as the shape of the display panel, and taking an expanded structural diagram of the display panel in the prior art shown in fig. 2 as an example, the display area of the display panel includes a first display area 1 'and a second display area 2', a first reference signal line Vref1 'is disposed in the first display area 1', a second reference signal line Vref2 'is disposed in the second display area 2', and the length of the second reference signal line Vref2 'is smaller than the length of the first reference signal line Vref 1'.
Since the lengths of the first reference signal line Vref1 'and the second reference signal line Vref 2' are different, and therefore the loads of the two lines are different, the attenuation degree of the reference signal transmitted through the first reference signal line Vref1 'and the second reference signal line Vref 2' is different, and thus the potential of the actual reference signal received by the sub-pixel electrically connected to the first reference signal line Vref1 'and the sub-pixel electrically connected to the second reference signal line Vref 2' are different. Therefore, when data signals are written into the grid electrode of the driving transistor subsequently, the data signals can be written on the basis of different actual reference signals, and on the premise that the writing time is fixed, the written sufficiency degree of the data signals is different, so that the actual data signals finally written into the two parts of sub-pixels are different, the luminance of the two parts of sub-pixels is different, and the screen splitting phenomenon occurs between the first display area 1 'and the second display area 2'.
Based on this, an embodiment of the present invention provides a display panel, as shown in fig. 3 to 5, fig. 3 is a schematic structural diagram of the display panel provided in the embodiment of the present invention, fig. 4 is a schematic expanded structural diagram of the display panel provided in the embodiment of the present invention, fig. 5 is a schematic partial enlarged diagram of fig. 4, and the display panel includes: the display device comprises a display area 1 and a non-display area 2 surrounding the display area 1, wherein sub-pixels 3 are arranged in the display area 1; a reference bus 4 disposed in the non-display region 2; a plurality of reference signal lines 5 arranged in the display region 1, wherein the reference signal lines 5 are electrically connected with the sub-pixels 3, and at least part of the reference signal lines 5 are electrically connected with the reference bus 4 through a load compensation structure 6; the load compensation structure 6 comprises a load compensation wire 7, a signal transmission wire 8 and at least two switches 9, wherein the load compensation wire 7 is electrically connected with the reference bus 4, the signal transmission wire 8 is electrically connected with the reference signal line 5, and the switches 9 are electrically connected between the load compensation wire 7 and the signal transmission wire 8.
The reference signal line 5 includes a first reference line 10 and a second reference line 11, the length of the first reference line 10 is less than the length of the second reference line 11, in the load compensation structure 6 electrically connected to the first reference line 10, the equivalent load of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the switch 9 is LA1, in the load compensation structure 6 electrically connected to the second reference line 11, the equivalent load of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the switch 9 is LA2, and LA1 is greater than LA 2.
Since the load compensation unit includes at least two switches 9, by controlling the conduction of different switches 9, the equivalent load of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the switches 9 can be adjusted, and the load compensation principle of the load compensation structure 6 is specifically explained below with reference to fig. 6, where fig. 6 is a schematic structural diagram of the load compensation structure provided in the embodiment of the present invention:
the load compensation trace 7 includes a first compensation line segment l11, a second compensation line segment l12, and a third compensation line segment l13, where a load of the first compensation line segment l11 is LA11 ', a load of the second compensation line segment l12 is LA12 ', and a load of the third compensation line segment l13 is LA13 '. The signal transmission trace 8 includes a first transmission line segment l21, a second transmission line segment l22 and a third transmission line segment l23, the load of the first transmission line segment l21 is LA21 ', the load of the second transmission line segment l22 is LA22 ', and the load of the third transmission line segment l23 is LA23 '.
Illustratively, when only the first switch 91 in the load compensation structure 6 is turned on, the equivalent loads of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the first switch 91 are LA1 ', LA1 ═ LA11 ' + LA21 ' + LA22 ' + LA23 '. When only the second switch 92 in the load compensation structure 6 is turned on, the equivalent load of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the second switch 92 is LA2 ', and LA 2' is LA11 '+ LA 12' + LA22 '+ LA 23'. When the first switch 91 and the second switch 92 in the load compensation structure 6 are turned on simultaneously, the equivalent load of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the first switch 91 and the second switch 92 is LA 3',
when the second switch 92 and the third switch 93 in the load compensation structure 6 are turned on simultaneously, the equivalent load of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the second switch 92 and the third switch 93 is LA 4',
it can be seen that by controlling the switches 9 at different positions and/or in different numbers to be turned on, the sizes of the equivalent loads of the load compensation trace 7 and the signal transmission trace 8 electrically connected through the switches 9 can be adjusted, so that the adjustment of the equivalent loads of the load compensation structure 6 in different degrees is realized.
In summary, in the display panel provided in the embodiment of the present invention, at least a portion of the reference signal lines 5 is electrically connected to the reference bus 4 through the load compensation structure 6, so that the load compensation structure 6 can compensate the load of the portion of the reference signal lines 5, and further, the equivalent load of the load compensation structure 6 electrically connected to the reference signal lines 5 with different lengths is different, so that the reference signal lines 5 with different lengths can be compensated with different degrees. Specifically, the length of the first reference line 10 is small, and thus the load of itself is small, and by setting the equivalent load of the load compensation structure 6 electrically connected to the first reference line 10 to be large, the load compensation of the first reference line 10 can be performed to a large extent; the length of the second reference line 11 is small and thus the self load is large, and by setting the equivalent load of the load compensation structure 6 electrically connected to the second reference line 11 to be large, the load compensation of the second reference line 11 can be performed to a small extent. Therefore, the load compensation structure 6 is used for carrying out load compensation on the first reference line 10 and the second reference line 11, the load difference with other reference signal lines 5 is reduced, and simultaneously, the loads of the compensated first reference line 10 and the compensated second reference line 11 tend to be consistent, so that the loads of the reference signal lines 5 in the display panel tend to be consistent, the attenuation degree difference of reference signals transmitted on different reference signal lines 5 is reduced, the uniformity of the reset degree of the sub-pixels 3 in different display areas is improved, the uniformity of the luminous brightness of the sub-pixels 3 in different display areas is improved, the screen splitting phenomenon is effectively improved, and the display performance is improved.
In addition, if the load of the reference signal line 5 is compensated by only one compensation line, the line width and the line length of the compensation line may deviate from the standard values due to the influence of process errors and other factors, and at this time, the load of the compensation line itself may change, thereby causing inaccurate load compensation of the reference signal line 5. By adopting the load compensation structure 6 provided by the embodiment of the invention, the load compensation degree of the load compensation structure 6 is adjusted by switching on or off the switch 9, the compensation mode is more flexible, and the accuracy of load compensation can be improved.
It should be noted that the display panel provided in the embodiment of the present invention may be a quad display panel as shown in fig. 2, and at this time, the first reference line 10 and the second reference line 11 may refer to the reference signal lines 5 with different lengths in the display area at the notch 12; alternatively, as shown in fig. 7, fig. 7 is another schematic structural diagram of the display panel provided in the embodiment of the present invention, the display panel provided in the embodiment of the present invention may also be a display panel having a through hole 13, wherein optical components such as a camera are disposed in the through hole 13, and at this time, the first reference line 10 and the second reference line 11 may refer to the reference signal lines 5 with different lengths in the display area 1 on both sides of the through hole 13; still alternatively, as shown in fig. 8, fig. 8 is another schematic structural diagram of the display panel provided in the embodiment of the present invention, the display panel provided in the embodiment of the present invention may also be a display panel having a groove 14, and at this time, the first reference line 10 and the second reference line 11 may refer to reference signal lines 5 with different lengths in the display area 1 on both sides of the groove 14; the specific shape of the display panel may be defined according to actual requirements, and the embodiment of the invention is not limited thereto.
It should be noted that the first reference line 10 and the second reference line 11 are not limitations on two or more reference signal lines 5 in the display panel, and among any two reference signal lines 5 having different lengths and electrically connected to the reference bus 4 through the load compensation structure 6, the reference signal line 5 having the shorter length may be regarded as the first reference line 10, and the reference signal line 5 having the longer length may be regarded as the second reference line 11.
In addition, it should be noted that when the length difference between a certain reference signal line 5 and the reference signal line 5 with the largest length in the display area 1 (the reference signal line 5 with the largest length can be regarded as a normal reference signal line of the display panel) is greater than 10%, the load difference between the certain reference signal line 5 and the normal reference signal line is large, and at this time, a load compensation structure 6 may be disposed between the certain reference signal line 5 and the reference bus 4, and the load compensation structure 6 may be used to perform load compensation on the certain reference signal line 5 and the normal reference signal line. When the length difference between a certain reference signal line 5 and a conventional reference signal line is less than or equal to 10%, the load difference between the certain reference signal line 5 and the conventional reference signal line is small, and at this time, the load compensation structure 6 does not need to be arranged between the certain reference signal line 5 and the reference bus 4, and load compensation is not needed.
Optionally, referring to fig. 6 again, the load compensation structure 6 may only include one load compensation trace 7, and the at least two switches 9 are electrically connected to different positions of the load compensation trace 7, at this time, by controlling the switches 9 at different positions and/or in different numbers to be turned on, the equivalent load of the load compensation structure 6 may be adjusted. Moreover, under the structure, only one load compensation wiring 7 needs to be arranged in each load compensation structure 6, wiring complexity of the load compensation structure 6 is simplified, and when the load compensation structure 6 is arranged in the non-display area 2, the width of a frame can be reduced, and narrow frame design is facilitated.
Optionally, as shown in fig. 9, fig. 9 is another schematic structural diagram of the load compensation structure provided in the embodiment of the present invention, where the load compensation structure 6 includes at least two load compensation traces 7, and the at least two load compensation traces 7 are electrically connected to at least two switches 9 in a one-to-one correspondence manner, and at this time, by controlling conduction of switches 9 at different positions and/or in different numbers, the equivalent load of the load compensation structure 6 can be adjusted. Moreover, under the structure, each switch 9 is connected to the reference bus 4 through one load compensation trace 7, when one load compensation trace 7 is disconnected from the reference bus 4 due to a process or an external force, the other load compensation traces 7 can still be used for realizing the electrical connection between the reference bus 4 and the first reference line 10 or the second reference line 11, and the other load compensation traces are used for realizing the load compensation, so that the reliability of the reference signal transmission and the reliability of the load compensation are improved.
Optionally, referring to fig. 5 again, the switch 9 is a thin film transistor, a control electrode of the switch 9 is electrically connected to the control signal line 15, a first electrode of the switch 9 is electrically connected to the load compensation trace 7, and a second electrode of the switch 9 is electrically connected to the signal transmission trace 8. When the control signal line 15 provides the switch 9 with a conducting level, the load compensation trace 7 electrically connected with the first pole of the switch 9 and the signal transmission trace 8 electrically connected with the second pole of the switch 9 are electrically connected, so that both the conduction of the reference signal transmission path and the load compensation can be realized.
Optionally, the load compensation trace 7 is formed of a first material and the signal transmission trace 8 is formed of a second material, the resistivity of the first material being greater than the resistivity of the second material. The first material with higher resistivity is selected to form the load compensation wire 7, so that the load of the load compensation wire 7 is higher, and the load compensation can be performed on the reference signal line 5 within a larger adjustable range.
Moreover, referring again to fig. 6, by making the resistivity of the load compensation trace 7 higher than that of the signal transmission trace 8, when the load compensation structure 6 achieves the adjustment of the load by turning on only one switch 9, for example, the load compensation structure 6 electrically connected to the first reference line 10 turns on only the second switch 92, and the equivalent load of the load compensation structure 6 is the load of the integral trace formed by the first compensation line segment l11, the second compensation line segment l12, the second transmission line segment l22 and the third transmission line segment l 23; the load compensation structure 6 electrically connected to the second reference line 11 only turns on the first switch 91, and the equivalent load of the load compensation structure 6 is the load of the whole wire formed by the first compensation line segment l11, the first transmission line segment l21, the second transmission line segment l22 and the third transmission line segment l 23. At this time, although the lengths of the whole traces formed in the two cases are the same, the load compensation trace 7 has a greater specific gravity in the whole trace when the second switch 92 is turned on, so that a greater degree of load compensation can be still achieved for the first reference line 10.
Alternatively, as shown in fig. 10 and fig. 11, fig. 10 is a schematic diagram of a film structure of a display panel provided in an embodiment of the present invention, and fig. 11 is a schematic diagram of another film structure of a display panel provided in an embodiment of the present invention, where the display panel includes an array layer 16 and a light emitting element layer 17, and the light emitting element layer 17 is located on one side of the array layer 16 facing a light emitting direction of the display panel; the array layer 16 includes an active layer 18, a gate layer 19, and a source/drain layer 20 sequentially arranged along the light-emitting direction of the display panel, and the light-emitting element layer 17 includes an anode layer 21, a light-emitting layer 22, and a cathode layer 23 sequentially arranged along the light-emitting direction of the display panel. Referring to fig. 10 again, the load compensation trace 7 and the active layer 18 are formed of the same material and disposed in the same layer, or, referring to fig. 11 again, the load compensation trace 7 and the anode layer 21 are formed of the same material and disposed in the same layer.
Since the resistivity of the polysilicon material forming the active layer 18 and the transparent conductive material such as indium tin oxide forming the anode layer 21 is high, the load compensation trace 7 is made of the same material as the active layer 18 or the anode layer 21, so that the load of the load compensation trace 7 itself is high, and the load compensation can be performed on the reference signal line 5 within a larger adjustable range. Moreover, by arranging the load compensation wire 7 and the active layer 18 or the anode layer 21 at the same layer, the load compensation wire 7 and the active layer 18 or the anode layer 21 can be formed by the same composition process without additional process formation, thereby simplifying the process flow and reducing the manufacturing cost.
Moreover, it should be noted that, when the load compensation trace 7 is disposed on the same layer as the active layer 18 or the anode layer 21, the load compensation trace 7 is disposed on a different layer from the reference bus 4 and the reference signal line 5, please refer to fig. 6 and 9 again, and the load compensation trace 7 and the reference bus 4 can be electrically connected through the wire switching hole 24.
Optionally, when the number of the switches 9 in the load compensation structure 6 is greater than or equal to three, the distance between two adjacent switches 9 is equal, and at this time, when the switches 9 at different positions or in different numbers are turned on, the equivalent load of the load compensation structure 6 changes regularly, so that the load is adjustable, has strong controllability, and is easy to control. Of course, to achieve a larger adjustable range for the load, the distance between two adjacent switches 9 may also be unequal.
Optionally, as shown in fig. 12, fig. 12 is a schematic structural diagram of a load compensation structure provided in the embodiment of the present invention, in which a length of the load compensation trace 7 electrically connected to the first reference line 10 in an extending direction thereof is L1, a length of the load compensation trace 7 electrically connected to the second reference line 11 in the extending direction thereof is L2, and L1 > L2; and/or, as shown in fig. 13, fig. 13 is a schematic structural diagram of a load compensation structure according to another embodiment of the present invention, in which a width of the load compensation trace 7 electrically connected to the first reference line 10 in a direction perpendicular to an extending direction thereof is H1, and a width of the load compensation trace 7 electrically connected to the second reference line 11 in the direction perpendicular to the extending direction thereof is H2, and H1 < H2.
With such an arrangement, the self load of the load compensation trace 7 corresponding to the first reference line 10 can be made larger, so that the load compensation of the first reference line 10 can be performed to a greater extent, and the compensated loads of the first reference line 10 and the second reference line 11 tend to be consistent.
Optionally, please refer to fig. 2, fig. 7, and fig. 8 again, at least a portion of the edge of the display area 1 is a non-linear edge, at this time, the shape of the display panel is irregular, and on the premise that the appearance of the display panel is variously designed to meet different requirements of users, the load compensation structure 6 can also be used to perform load compensation on the reference signal lines 5 with different lengths caused by the irregular reason, so that the compensated loads of the reference signal lines 5 tend to be consistent, thereby effectively improving the screen splitting phenomenon and optimizing the display performance.
As shown in fig. 14, fig. 14 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the display device includes the display panel 100. The specific structure of the display panel 100 has been described in detail in the above embodiments, and is not described herein again. Of course, the display device shown in fig. 14 is only a schematic illustration, and the display device may be any electronic device with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.
Because the display device provided by the embodiment of the invention comprises the display panel, the display device is adopted, and the load compensation structures 6 are utilized to carry out load compensation of different degrees on the reference signal lines 5 with different lengths, so that the loads of the reference signal lines 5 in the display panel tend to be consistent, the attenuation degree difference of the reference signals during transmission on different reference signal lines 5 is reduced, the consistency of the luminous brightness of the sub-pixels 3 is further improved, the screen splitting phenomenon is effectively improved, and the display performance is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A display panel, comprising:
the display device comprises a display area and a non-display area surrounding the display area, wherein sub-pixels are arranged in the display area;
the reference bus is arranged in the non-display area;
the reference signal lines are arranged in the display area, electrically connected with the sub-pixels, and at least part of the reference signal lines are electrically connected with the reference bus through a load compensation structure; the load compensation structure comprises a load compensation wire, a signal transmission wire and at least two switches, wherein the load compensation wire is electrically connected with the reference bus, the signal transmission wire is electrically connected with the reference signal wire, and the switches are electrically connected between the load compensation wire and the signal transmission wire;
the reference signal line comprises a first reference line and a second reference line, the length of the first reference line is smaller than that of the second reference line, in the load compensation structure electrically connected with the first reference line, the equivalent load of the load compensation trace and the signal transmission trace electrically connected through the switch is LA1, in the load compensation structure electrically connected with the second reference line, the equivalent load of the load compensation trace and the signal transmission trace electrically connected through the switch is LA2, and LA1 is greater than LA 2.
2. The display panel of claim 1, wherein the load compensation structure comprises only one load compensation trace, and at least two of the switches are electrically connected at different positions of the load compensation trace.
3. The display panel of claim 1, wherein the load compensation structure comprises at least two of the load compensation traces, and at least two of the load compensation traces are electrically connected to at least two of the switches in a one-to-one correspondence.
4. The display panel of claim 1, wherein the switch is a thin film transistor, a control electrode of the switch is electrically connected to a control signal line, a first electrode of the switch is electrically connected to the load compensation trace, and a second electrode of the switch is electrically connected to the signal transmission trace.
5. The display panel of claim 1 wherein the load compensation traces are formed from a first material and the signal transmission traces are formed from a second material, the first material having a resistivity greater than the resistivity of the second material.
6. The display panel according to claim 5, wherein the display panel comprises an array layer and a light emitting element layer, and the light emitting element layer is located on one side of the array layer facing a light emitting direction of the display panel;
the array layer comprises an active layer, a grid layer and a source drain layer which are sequentially arranged along the light-emitting direction of the display panel, and the light-emitting element layer comprises an anode layer, a light-emitting layer and a cathode layer which are sequentially arranged along the light-emitting direction of the display panel;
the load compensation wire and the active layer are made of the same material and are arranged on the same layer, or the load compensation wire and the anode layer are made of the same material and are arranged on the same layer.
7. The display panel according to claim 1, wherein the number of the switches in the load compensation structure is greater than or equal to three, and the distance between two adjacent switches is equal.
8. The display panel according to claim 1,
the length of the load compensation trace electrically connected with the first reference line in the extending direction is L1, the length of the load compensation trace electrically connected with the second reference line in the extending direction is L2, and L1 is greater than L2;
and/or the width of the load compensation trace electrically connected with the first reference line in the direction perpendicular to the extending direction of the load compensation trace is H1, the width of the load compensation trace electrically connected with the second reference line in the direction perpendicular to the extending direction of the load compensation trace is H2, and H1 < H2.
9. The display panel according to claim 1, wherein at least a part of the edge of the display region is a non-linear edge.
10. A display device comprising the display panel according to any one of claims 1 to 9.
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| CN111768713B (en) * | 2020-07-31 | 2022-01-14 | 武汉天马微电子有限公司 | Display panel and display device |
| CN117642796A (en) * | 2022-06-23 | 2024-03-01 | 京东方科技集团股份有限公司 | Display panel and display device |
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