CN107644621B - display panel - Google Patents
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- CN107644621B CN107644621B CN201711123636.5A CN201711123636A CN107644621B CN 107644621 B CN107644621 B CN 107644621B CN 201711123636 A CN201711123636 A CN 201711123636A CN 107644621 B CN107644621 B CN 107644621B
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Abstract
The invention provides a display panel, which comprises a display area and a frame area, and also comprises: a plurality of reference voltage lines positioned in the display area; the first lead and the second lead are electrically connected with the voltage providing unit, and the first lead and the second lead are respectively electrically connected with two ends of the reference voltage line, so that the voltage applied to the plurality of reference voltage lines is reduced along with the increase of the distance between the reference voltage line and the voltage providing unit. The display panel provided by the invention ensures that the voltages at two ends of the light-emitting diodes in different areas are kept stable, namely, the voltage at the first end of the light-emitting diode does not change along with the increase of the distance between the light-emitting diode and the voltage providing unit, the uniformity of the light-emitting brightness of the light-emitting diode in the display area is improved, and the display effect of the display panel is further improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel.
background
among various display devices, organic light emitting display panels have been drawing attention and being widely used due to their advantages of low power consumption, wide viewing angle, high brightness, low weight, and the like.
However, as the size of an Organic Light Emitting (OLED) display panel becomes larger, the display panel has a problem of non-uniformity of display luminance, which is expressed as a region closer to a driving chip where the luminance is higher, and the display luminance gradually decreases as the distance from the driving chip is larger.
Disclosure of Invention
In view of the above, the present invention provides a display panel, which reduces the uneven brightness of the display area of the display panel along with the distance between the display area and the driving chip to a certain extent, and improves the display effect of the display panel.
In order to achieve the purpose, the invention provides the following technical scheme:
A display panel comprising a display area and a bezel area, the display panel further comprising:
A plurality of reference voltage lines positioned in the display area;
The first lead and the second lead are electrically connected with the voltage providing unit, and the first lead and the second lead are respectively electrically connected with two ends of the reference voltage line, so that the voltage applied to the plurality of reference voltage lines is reduced along with the increase of the distance between the reference voltage line and the voltage providing unit.
Optionally, the plurality of reference voltage lines include a plurality of first reference voltage lines distributed in parallel with the data lines of the display panel, wherein,
A first end of each of the first reference voltage lines is electrically connected to the first lead, and a second end of each of the first reference voltage lines is electrically connected to the second lead.
optionally, the first lead is located at a side of the frame region close to the voltage providing unit, and the second lead is located at a side of the frame region far from the voltage providing unit, where a potential of the first lead is higher than a potential of the second lead.
optionally, the reference voltage lines include second reference voltage lines distributed parallel to the scanning lines of the display panel, the first lead is located at a first side of the bezel region, the second lead is located at a second side of the bezel region, the voltage providing unit is located at a fourth side of the bezel region, the first side is adjacent to the fourth side, and the second side is opposite to the first side;
The display panel further comprises a third lead positioned at a third side of the bezel area;
First ends of the first lead and the second lead, which are close to the fourth side, are connected with the voltage providing unit, second ends of the first lead and the second lead, which are close to the third side, are connected with the third lead, and the potentials of the first ends of the first lead and the second lead are higher than that of the third lead;
And two ends of the second reference voltage line are respectively and electrically connected with the first lead and the second lead.
Optionally, the third lead is electrically connected to the voltage supply unit.
Optionally, the plurality of reference voltage lines include a plurality of first reference voltage lines and a plurality of second reference voltage lines, the first reference voltage lines are distributed in parallel with the data lines of the display panel, and the second reference voltage lines are distributed in parallel with the scan lines of the display panel;
The voltage providing unit is located on a fourth side edge of the frame area, the first lead is located on the fourth side edge of the frame area, the second lead is located on a third side edge of the frame area, which is far away from the voltage providing unit, and the potential of the first lead is higher than that of the second lead;
The first end of the first reference voltage line close to the voltage providing unit is electrically connected with the first lead, and the second end of the first reference voltage line far away from the voltage providing unit is electrically connected with the second lead.
optionally, the display panel further includes a fourth lead located at a first side of the frame region, and/or a fifth lead located at a second side of the frame region, where the first side is adjacent to the fourth side, and the second side is opposite to the first side;
first ends, close to the fourth side, of the fourth lead and the fifth lead are connected with the voltage providing unit or the first lead, and second ends, far away from the fourth side, of the fourth lead and the fifth lead are connected with the second lead;
And two ends of the second reference voltage line are respectively and electrically connected with the fourth lead and the fifth lead.
Optionally, the voltage providing unit is a driving chip.
Optionally, the fourth side is a bottom side or a top side of the display panel.
Optionally, for the same display panel, a voltage difference between the first lead and the second lead is a fixed value.
optionally, for the same display panel, a voltage difference between the first end and the second end of the lead located at the first side is a fixed value.
Optionally, the reference voltage line is made of a high-resistance conductive material.
Optionally, the reference voltage line is made of Mo, or a highly doped low temperature polysilicon material, or a conductive oxide semiconductor material.
The invention also discloses a display panel, which comprises a display area and a frame area, and the display panel also comprises:
A plurality of reference voltage lines in the display region, the plurality of reference voltage lines being distributed in parallel with the data lines of the display panel;
the voltage supply unit is positioned on a fourth side edge of the frame area, and the first lead is positioned on a third side edge of the frame area, wherein the third side edge is opposite to the fourth side edge;
Wherein the reference voltage line is directly electrically connected to the voltage providing unit near a first end of the voltage providing unit, the reference voltage line is electrically connected to the first lead line far from a second end of the voltage providing unit, and a potential of the first end of the reference voltage line is higher than a potential of the second end.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
According to the display panel provided by the invention, as the power supply voltage of the light emitting diodes is reduced along with the increase of the distance between the light emitting diodes and the voltage providing unit, the first lead and the second lead which are electrically connected with the voltage providing unit respectively apply voltages to the two ends of the reference voltage line, so that the voltages applied to the plurality of reference voltage lines are reduced along with the increase of the distance between the reference voltage line and the voltage providing unit, namely, the voltages at the two ends of the light emitting diodes in different regions are ensured to be kept stable, namely, the voltage at the first end of the light emitting diodes is not changed along with the increase of the distance between the light emitting diodes and the voltage providing unit, the uniformity of the light emitting brightness of the light emitting diodes in the display region is improved, and the display effect of the display panel is improved.
drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
fig. 1 is a schematic circuit diagram of a pixel region of a conventional organic light emitting display device including 3T 1C;
FIG. 2 is a timing diagram of voltages of adjacent gate lines Scan1 and Scan2 in the display panel of FIG. 1;
Fig. 3 is a schematic top view illustrating a display panel according to an embodiment of the present invention;
fig. 4 is a schematic top view illustrating a display panel according to another embodiment of the present invention;
Fig. 5 is a schematic top view illustrating a display panel according to still another embodiment of the present invention;
fig. 6 is a schematic top view illustrating a display panel according to another embodiment of the present invention;
Fig. 7 is a schematic top view illustrating a display panel according to still another embodiment of the present invention;
fig. 8 is a schematic top view illustrating a display panel according to another embodiment of the present invention;
fig. 9 is a schematic diagram of a display device according to an embodiment of the invention.
Detailed Description
As described in the background art, the luminance of the display panel has a problem that the luminance decreases with the distance from the driving chip, and the inventor found that the reason for this problem includes two aspects, that is, because the first power voltage Vdd and the second power voltage Vee, etc. are provided by the driving chip, and the voltage transmission line PVDD at the end of the light emitting diode D for transmitting the first power voltage Vdd has an excessively large resistance, which leads to current loss during voltage transmission, and thus leads to the light emitting diode farther from the driving chip, which has lower display luminance; secondly, the temperature of different pixel areas is different, so that the brightness of the pixels is displayed unevenly.
the problem of uneven display exists in both Low Temperature polysilicon thin film transistor (LTPS) driven OLED display panels and metal Oxide thin film transistor (Oxide-TFT) driven OLED display panels, but the problem of Oxide-TFT driven OLED display panels is more serious.
Specifically, as shown in fig. 1 and fig. 2, fig. 1 is a schematic circuit diagram of a pixel region of an organic light emitting display device including 3T1C (i.e., 3 transistors and 1 capacitor) in the prior art, and fig. 2 is a timing diagram of voltages of adjacent gate lines Scan1 and Scan 2. As can be seen from fig. 1 and 2, when the first gate line Scan1 is at a high potential, the first transistor M1 is turned on, the voltage Vdata of the data line is transmitted to the first node N1, the second transistor M2 is turned on, the power voltage Vdd is transmitted to the second node N2 through the second transistor M2, when the second gate line Scan2 is at a high potential, the third transistor M3 is turned on, the reference voltage Vref is transmitted to the second node N2 through the third transistor M3, and at this time, the current passing through the two ends of the light emitting diode D is determined by Vdd-Vref, i.e., the voltage at the second node N2 end of the light emitting diode D is Vdd-Vref, and the voltage at the other end of the light emitting diode D is the power voltage Vee provided by the driving chip.
Based on the above principle, the inventors found that by controlling the voltage value of the reference voltage Vref, the current flowing through the two ends of the light emitting diode D can be controlled, and thus the display effect of the light emitting diode can be improved.
Accordingly, embodiments of the present invention provide a display panel to overcome the above problems in the prior art, where the display panel includes a display area and a frame area, and the display panel further includes:
a plurality of reference voltage lines positioned in the display area, the reference voltage lines providing a reference voltage Vref for the display area;
the first lead and the second lead are electrically connected with the voltage providing unit, and the first lead and the second lead are respectively electrically connected with two ends of the reference voltage line, so that the voltage applied to the plurality of reference voltage lines is reduced along with the increase of the distance between the reference voltage line and the voltage providing unit.
the voltage providing unit in the embodiment of the present invention may be a separately provided voltage providing circuit, and may also be integrated on the driver chip IC or the FPC of the display panel.
In addition, for the same display panel, the voltage difference Δ V between the first reference voltage V1 at the position of the reference voltage line closest to the voltage providing unit and the second reference voltage V2 at the position of the reference voltage line farthest from the voltage providing unit is a fixed positive value, that is, Δ V is a fixed value from V1 to V2. The voltage difference delta V can be debugged according to the display effect of the display panel before the display panel leaves a factory so as to determine the voltage difference delta V corresponding to each display panel, and after the voltage difference delta V is determined before leaving the factory, the voltage difference delta V can not be adjusted and changed by the driving chip in the later use process. The voltage difference Δ V may be the same or different for different display panels in the same production batch.
after the voltage difference Δ V is determined for the same display panel, the current of the OLED pixel unit close to the voltage providing unit is a (Vdd-V1), and the current of the OLED pixel unit far from the voltage providing unit is a (Vdd-V2) ═ a [ Vdd- (V1- Δ V) ] ═ a (Vdd-V1 +/Δ V), where a is a constant related to the resistance values of the driving circuit and the OLED pixel unit, and a is a fixed value for the same display panel. Therefore, due to the existence of the voltage difference Δ V, the current of the OLED pixel unit far away from the voltage providing unit is increased compared with the prior art, and the voltage loss of the first power voltage Vdd on the voltage transmission line can be cancelled, so that compared with the prior art, the luminance of the OLED pixel unit far away from the voltage providing unit is improved to a certain extent, and the display effect of the display panel is improved.
In addition, it should be noted that the material of the reference voltage line in the present embodiment may be a high-resistance conductive material. Specifically, the reference voltage line may be made of Mo, a highly doped Low Temperature Polysilicon (LTPS), or a conductive oxide semiconductor.
Taking the square resistance of the reference voltage line as 0.7 Ω/□, the width of the reference voltage line as 3 microns, the length as 200mm (i.e. the length of the display panel), Δ V as 0.5V, and the number n of reference voltage lines in the display panel as 2000, the extra power consumption W generated on all the reference voltage lines is:
W＝n*△V 2/R＝2000*0.25/(0.7*200000/3)＝0.01w
Therefore, after the scheme of the embodiment of the invention is implemented, for the display panel, compared with the prior art, the extra power consumption added by the scheme is completely sustainable by the display panel, that is, the influence of the scheme of the embodiment of the invention on the function of the display panel is completely acceptable. In addition, in other embodiments, the reference voltage line may be made of a material with a higher resistance, so as to further reduce the extra power consumption of the reference voltage line.
In addition, the solution of the embodiment of the present invention can be applied to a compensation circuit in which the reference voltage potential can affect the luminance of the OLED pixel unit, including but not limited to a display panel adopting the circuit structure shown in fig. 1.
In the display panel provided by the present invention, since the power voltage Vdd of the leds decreases with the distance between the leds and the voltage providing unit, in this embodiment, voltages are respectively applied to two ends of the reference voltage line through the first lead and the second lead electrically connected to the voltage providing unit, so that the voltages applied to the reference voltage lines decrease with the distance between the reference voltage line and the voltage providing unit, that is, on the basis that the voltage at the first end of the leds in different areas (i.e., the end of the second node N2 shown in fig. 1) is kept stable, that is, the voltage at the second end of the leds (i.e., the end of the second power voltage Vee) is kept stable, the voltage at the two ends of the leds does not change with the distance between the leds and the voltage providing unit, and the problem that the voltage of the leds in the display area is unstable due to the resistance on the first voltage transmission line PVDD increasing with the distance between the first voltage providing unit and the voltage providing unit is solved The uniformity of the luminous brightness of the light emitting diodes in the display area is improved, and the display effect of the display panel is improved.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention for different display panels, and it is obvious that the described embodiments are only a part of the embodiments of the present 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.
an embodiment of the present invention provides a display panel, a schematic top view structure of which is shown in fig. 3, the display panel 10 includes a display area 11 and a frame area 12, and the display panel further includes: a plurality of reference voltage lines located in the display region, and a first lead 121, a second lead 122 and a voltage supply unit 120 located in the bezel region 12.
As shown in fig. 3, the plurality of reference voltage lines in this embodiment include a plurality of first reference voltage lines 111 distributed in parallel with the data lines of the display panel, where the data line direction is a Y direction, the scan line direction is an X direction, and each first reference voltage line 111 is electrically connected to the pixel unit 110 in the column where it is located, and is configured to provide a reference voltage for the pixel unit 110. In this embodiment, in order to decrease the voltage applied to the plurality of first reference voltage lines 111 with the increase of the distance between the first reference voltage line 111 and the voltage providing unit 120, different voltages need to be applied to the two ends of the first reference voltage line 111, and the voltage at the near end of the first reference voltage line 111, which is closer to the voltage providing unit 120, is higher than the voltage at the far end of the first reference voltage line 111, which is farther from the voltage providing unit 120.
As shown in fig. 3, in the present embodiment, the first lead 121 is located at a side of the frame region 12 close to the voltage providing unit 120, and the second lead 122 is located at a side of the frame region 12 far from the voltage providing unit 120, wherein a potential V1 of the first lead 121 is higher than a potential V2 of the second lead 122.
In addition, in this embodiment, the first lead 121 and the second lead 122 are electrically connected to two ends of the first reference voltage line 111, specifically, a first end (i.e., a near end closer to the voltage providing unit 120) of each first reference voltage line 111 is electrically connected to the first lead 121, and a second end (i.e., a far end from the voltage providing unit 120) of each first reference voltage line 111 is electrically connected to the second lead 122. Since V1> V2, the potential of the first end of the first reference voltage line 111 is higher than the potential of the second end of the first reference voltage line 111.
the voltages in the first and second leads 121 and 122 in this embodiment may be provided by the voltage providing units 120, respectively, i.e., the first and second leads 121 and 122 are electrically connected to the voltage providing units 120. As shown in fig. 3, the first lead 121 may be located at the same side of the frame region 12 together with the voltage providing unit 120, i.e., one end or both ends of the first lead 121 may be directly connected to the voltage providing unit 120. The second lead 122 is located at a side opposite to the voltage providing unit 120, and therefore one end or two ends of the second lead 122 need to be connected to the voltage providing unit 120 through the third leads 123 located at the other two sides of the frame region 12.
As the size of the display panel increases, in order to keep the voltage on both ends of the first wire 121 stable and uniform, it is preferable in this embodiment that both ends of the first wire 121 are connected to the voltage supply unit 120, as shown in fig. 3. Also, in order to keep the voltage across the second lead 122 stable and uniform, it is preferable that both ends of the second lead 122 are connected to the voltage supply unit 120 through the third lead 123 in this embodiment. In other embodiments, only one ends of the first and second wires 121 and 122 may be connected to the voltage supply unit 120.
In the embodiment, for the display panel in which the first reference voltage line 121 and the data line are distributed in parallel, the voltage and the voltage difference at two ends of the first reference voltage line 121 can be controlled by controlling the potentials of the first lead 121 and the second lead 122, so that the voltage on the first reference voltage line 121 decreases with the increase of the distance from the voltage providing unit 120, and further the current of the OLED pixel unit far from the voltage providing unit 120 increases compared with the prior art, and the voltage loss of the first power voltage Vdd on the voltage transmission line can be cancelled, so that compared with the prior art, the problem of decrease of the current in the light emitting diode far from the voltage providing unit in the display area due to the increase of the resistance on the first voltage transmission line PVDD with the increase of the distance from the voltage providing unit is solved, and the luminance of the OLED pixel unit far from the voltage providing unit is improved to a certain extent, the display effect of the display panel is improved.
Fig. 4 is a schematic top view of a display panel according to another embodiment of the present invention, which is different from the previous embodiment in that a plurality of reference voltage lines in the present embodiment includes a plurality of second reference voltage lines 112 distributed in parallel with scanning lines of the display panel (i.e., distributed in parallel with the X-axis direction in fig. 4), and each of the second reference voltage lines 112 is electrically connected to a pixel unit 110 in a row where the second reference voltage line is located, and is used for providing a reference voltage for the pixel unit 110. The first lead 121 is located at the first side 21 of the frame region, and the second lead 122 is located at the second side 22 of the frame region. The voltage providing unit 120 in this embodiment is located at a fourth side 24 of the frame region, the first side 21 is adjacent to the fourth side 24, and the second side 22 is opposite to the first side 21.
the first lead 121 and the second lead 122 in this embodiment respectively supply voltages to two ends of the second reference voltage line 112, that is, in order to ensure the stability of the voltages at two ends of the same second reference voltage line 112 and make the voltages on the same second reference voltage line 112 consistent, two ends of the second reference voltage line 112 in this embodiment are respectively electrically connected to the first lead 121 and the second lead 122.
Further, for the purpose of reducing the voltage applied to the plurality of second reference voltage lines 112 with the distance between the second reference voltage lines 112 and the voltage providing unit 120, the voltages at the two ends of the first lead 121 and the second lead 122 need to be reduced with the distance from the voltage providing unit 120, that is, the voltages at the two ends of the first lead 121 and the two ends of the second lead 122 need to be different, and the voltage at the near end closer to the voltage providing unit 120 is greater than the voltage at the far end farther from the voltage providing unit 120.
Based on this, the first ends of the first lead 121 and the second lead 122 close to the fourth side 24 are connected to the voltage providing unit 120, and the voltage providing unit 120 provides the first voltage V1 for the first ends of the first lead 121 and the second lead 122.
in addition, the display panel 10 in this embodiment further includes a third lead 123 located at the third side 23 of the frame region 12. The second ends of the first and second leads 121 and 122 near the third side 23 are connected to the third lead 123, and the third lead 123 provides a second voltage V2 to the second ends of the first and second leads 121 and 122. In this embodiment, the third lead 123 may also be directly electrically connected to the voltage providing unit 120, and the voltage providing unit 120 provides the second voltage V2 to the third lead 123.
the potentials of the first ends of the first and second wires 121 and 122 are higher than the potentials of the second ends of the first and second wires 121 and 122, that is, the potentials of the first ends of the first and second wires 121 and 122 are higher than the potential of the third wire 123, that is, V1> V2, so that the voltages applied to the plurality of second reference voltage lines 112 decrease with the increase of the distance between the second reference voltage lines 112 and the voltage providing unit 120.
Fig. 5 shows a schematic top view structure diagram of a display panel according to another embodiment of the present invention, and the distribution manner of the reference voltage lines in this embodiment combines the features of the above two embodiments, that is, the reference voltage lines in this embodiment include a plurality of first reference voltage lines 111 and a plurality of second reference voltage lines 112, the first reference voltage lines 111 are distributed in parallel with the data lines of the display panel 10, and the second reference voltage lines 112 are distributed in parallel with the scan lines of the display panel.
Based on the distribution of the reference voltage lines shown in fig. 5, the reference voltage at both ends of the first reference voltage line 111 is only adjusted in the present embodiment, and the application manner (not shown) of the reference voltage at both ends of the second reference voltage line 112 can be the same as that in the prior art. Specifically, in this embodiment, the application manner of the reference voltages on the two ends of the first reference voltage line 111 can refer to the embodiment corresponding to fig. 3.
That is, the voltage providing unit 120 in this embodiment is located at the fourth side 24 of the frame region 12, the first lead 121 is located at the fourth side 24 of the frame region 12, and the second lead 122 is located at the third side 23 of the frame region 12 away from the voltage providing unit 120, wherein a potential of the first lead 121 is higher than a potential of the second lead 122.
a first end of the first reference voltage line 111 close to the voltage providing unit 120 is electrically connected to the first lead 121, and a second end of the first reference voltage line 111 far from the voltage providing unit 120 is electrically connected to the second lead 122.
In other embodiments, the adjustment may also be performed only for the reference voltage across the second reference voltage line 112, as shown in fig. 6, and the application manner (not shown) of the reference voltage across the first reference voltage line 111 may be the same as that in the prior art. Specifically, in this embodiment, the manner of applying the reference voltages on the two ends of the second reference voltage line 112 can refer to the embodiment corresponding to fig. 4, and details thereof are not repeated here.
Fig. 7 is a schematic top view of a display panel according to another embodiment of the present invention, which is based on the display panel shown in fig. 5 and 6, and combines the display panel and the display panel, that is, in this embodiment, for the display panel simultaneously including a plurality of first reference voltage lines 111 and a plurality of second reference voltage lines 112, reference voltages at two ends of the plurality of first reference voltage lines 111 and two ends of the plurality of second reference voltage lines 112 are adjusted. The first reference voltage line 111 is parallel to the data lines of the display panel 10, and the second reference voltage line 112 is parallel to the scan lines of the display panel.
Compared to the embodiment shown in fig. 5, the display panel 10 disclosed in this embodiment further includes: a fourth lead 124 at the first side 21 of the bezel area 12 and a fifth lead 125 at the second side 22 of the bezel area 12. Wherein the first side 21 is adjacent to the fourth side 24, and the second side is opposite to the first side.
The first ends of the fourth and fifth leads 124 and 125 near the fourth side 24 are connected to the voltage supply unit 120, as shown in fig. 7; second ends of the fourth lead 124 and the fifth lead 125 away from the fourth side 24 are connected to the second lead 122, and a voltage is provided to the second ends of the fourth lead 124 and the fifth lead 125 by the second lead 122; and both ends of the second reference voltage line 112 are electrically connected to the fourth and fifth wires 123 and 125, respectively.
in other embodiments, the first ends of the fourth lead 124 and the fifth lead 125 near the fourth side 24 may be further connected to a first lead 121 (not shown), the first lead is provided with a voltage by the voltage providing unit 120, and the first ends of the fourth lead 124 and the fifth lead 125 near the fourth side 24 are provided with a voltage by the first lead 121.
in conjunction with the description of the embodiment corresponding to fig. 3 and 4, the reference voltage line in this embodiment is a grid-shaped voltage line formed by the first reference voltage line and the second reference voltage line, and the reference voltages applied to the first reference voltage line and the second reference voltage line are both reduced as the distance between the reference voltage line and the voltage providing unit is increased, thereby improving the display effect of the display panel.
fig. 8 shows a schematic top view structure of a display panel according to another embodiment of the present invention, where the display panel 10 includes a display area 11 and a frame area 12, and the display panel further includes:
a plurality of reference voltage lines 111 (i.e., first reference voltage lines 111 shown in fig. 3) in the display region 11, the plurality of reference voltage lines 111 being arranged in parallel with the data lines of the display panel 10;
A voltage providing unit 120 located at a fourth side 24 of the bezel area 12, and a first lead 121 located at a third side 23 of the bezel area 12, the third side 23 being opposite to the fourth side 24.
Wherein a first end of the reference voltage line 111 close to the voltage providing unit 120 is directly electrically connected to the voltage providing unit 120, a second end of the reference voltage line 111 far from the voltage providing unit 120 is electrically connected to the first lead 121, and a first end of the reference voltage line 111 has a higher potential than a second end.
also, the first lead 121 is connected to the voltage supply unit 120 through third leads 123 at both ends thereof, respectively, to which a voltage is supplied from the voltage supply unit 120.
In this embodiment, the first ends of the plurality of reference voltage lines 111 are directly connected to the voltage providing unit 120, rather than being connected through the leads located on the same side as the voltage providing unit 120, and the leads located on the same side as the voltage providing unit 120 are omitted, compared to the embodiment corresponding to fig. 3.
In this embodiment, the manner of providing the potentials at the two ends of the plurality of reference voltage lines 111 and the difference between the potentials at the two ends of the plurality of reference voltage lines may refer to the description of the manner of providing the potential on the first reference voltage line 111 in the embodiment corresponding to fig. 3, and are not repeated herein.
For the above embodiments, it should be noted that the fourth side 24 may be a bottom side or a top side of the display panel, i.e., the voltage providing unit 120 may be disposed on the bottom side or the top side of the display panel. Accordingly, the positions of the other sides may be adjusted accordingly based on the setting of the fourth side 24.
Moreover, as can be understood by those skilled in the art, for the solutions shown in fig. 3, fig. 5 and fig. 7, for the same display panel, the voltage difference Δ V between the first lead 121 and the second lead 122 is a fixed value, that is, the voltage providing unit 120 only needs to provide a fixed voltage for the first lead 121 and the second lead 122, respectively, so that the potential at each position of the first reference voltage line 111 can be reduced as the distance between the first reference voltage line and the voltage providing unit 120 increases.
accordingly, for the solution shown in fig. 8, for the same display panel, the voltage provided by the voltage providing unit 120 is a fixed value for the voltage provided by the first end of the reference voltage line 111 and the voltage difference between the first lead 121 and the voltage provided by the voltage providing unit.
For the solutions shown in fig. 4, 6 and 7, the voltage difference Δ V between the first end and the second end of the lead located at the first side 21 is a fixed value for the same display panel. That is, for the same display panel, the second reference voltage lines 112 distributed in parallel with the scan lines have the same potential on each of the reference voltage lines, but have different potentials on the reference voltage lines at different distances from the voltage supply voltage 120, and decrease as the distance between the reference voltage line and the voltage supply voltage 120 increases.
with reference to the above description of the embodiments, the voltage difference Δ V may be debugged according to the display effect of the display panel before the display panel leaves the factory, so as to determine the voltage difference Δ V corresponding to each display panel, and after the voltage difference Δ V is determined before leaving the factory, the voltage difference Δ V is not adjusted or changed by the driving chip during the later use process. The voltage difference Δ V may be the same or different for different display panels in the same production batch.
In addition, it should be noted that, for the display panel including the first reference voltage line 111 and the second reference voltage line 112 in fig. 5 to 7, in the embodiment of the present invention, only the first reference voltage line 111 and the second reference voltage line 112 are electrically connected to the pixel unit 110 as an example, and the manner of applying the voltage to the first reference voltage line 111 and the second reference voltage line 112 is described. In other embodiments, there are other various connection manners between the first reference voltage line 111 and the second reference voltage line 112 and the pixel unit 110, which may refer to the connection manners in the prior art, and the connection manners are not limited in this embodiment of the present invention.
Those skilled in the art will understand that the display panels in the above embodiments can be applied to different display devices, and the display device can be a mobile phone as shown in fig. 9, and can also be a tablet computer, a notebook computer, a desktop computer, a television, a large-screen display screen, and the like.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
the previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (14)
1. A display panel, comprising a display area and a bezel area, the display panel further comprising:
A plurality of reference voltage lines positioned in the display area;
The first lead and the second lead are electrically connected with the voltage providing unit and are respectively electrically connected with two ends of the reference voltage line, so that the voltage applied to the plurality of reference voltage lines is reduced along with the increase of the distance between the reference voltage lines and the voltage providing unit;
For the same display panel, the voltage difference between the first reference voltage at the position of the reference voltage line closest to the voltage providing unit and the second reference voltage at the position of the reference voltage line farthest from the voltage providing unit is a fixed value.
2. The display panel according to claim 1, wherein the plurality of reference voltage lines includes a plurality of first reference voltage lines distributed in parallel with data lines of the display panel,
A first end of each of the first reference voltage lines is electrically connected to the first lead, and a second end of each of the first reference voltage lines is electrically connected to the second lead.
3. The display panel according to claim 2, wherein the first lead is located on a side of the frame region close to the voltage supply unit, and the second lead is located on a side of the frame region away from the voltage supply unit, wherein a potential of the first lead is higher than a potential of the second lead.
4. The display panel according to claim 1, wherein the reference voltage lines include a second reference voltage line parallel to a scan line of the display panel, the first lead is located at a first side of the bezel region, the second lead is located at a second side of the bezel region, the voltage supplying unit is located at a fourth side of the bezel region, the first side is adjacent to the fourth side, and the second side is opposite to the first side;
The display panel further comprises a third lead positioned at a third side of the bezel area;
First ends of the first lead and the second lead, which are close to the fourth side, are connected with the voltage providing unit, second ends of the first lead and the second lead, which are close to the third side, are connected with the third lead, and the potentials of the first ends of the first lead and the second lead are higher than that of the third lead;
And two ends of the second reference voltage line are respectively and electrically connected with the first lead and the second lead.
5. the display panel according to claim 4, wherein the third lead is electrically connected to the voltage supply unit.
6. The display panel according to claim 1, wherein the plurality of reference voltage lines include a plurality of first reference voltage lines and a plurality of second reference voltage lines, the first reference voltage lines being arranged in parallel with data lines of the display panel, the second reference voltage lines being arranged in parallel with scan lines of the display panel;
The voltage providing unit is located on a fourth side edge of the frame area, the first lead is located on the fourth side edge of the frame area, the second lead is located on a third side edge of the frame area, which is far away from the voltage providing unit, and the potential of the first lead is higher than that of the second lead;
the first end of the first reference voltage line close to the voltage providing unit is electrically connected with the first lead, and the second end of the first reference voltage line far away from the voltage providing unit is electrically connected with the second lead.
7. the display panel according to claim 6, wherein the display panel further comprises a fourth lead located at a first side of the bezel area, and/or a fifth lead located at a second side of the bezel area, wherein the first side is adjacent to the fourth side, and the second side is opposite to the first side;
First ends, close to the fourth side, of the fourth lead and the fifth lead are connected with the voltage providing unit or the first lead, and second ends, far away from the fourth side, of the fourth lead and the fifth lead are connected with the second lead;
And two ends of the second reference voltage line are respectively and electrically connected with the fourth lead and the fifth lead.
8. The display panel according to any one of claims 4 to 7, wherein the voltage supply unit is a driving chip.
9. The display panel of claim 8, wherein the fourth side is a bottom side or a top side of the display panel.
10. the display panel according to claim 2, 3 or 6, wherein the voltage difference between the first lead and the second lead is the fixed value for the same display panel.
11. The display panel according to claim 4, 5 or 7, wherein the voltage difference between the first end and the second end of the lead at the first side is the fixed value for the same display panel.
12. The display panel according to claim 1, wherein a material of the reference voltage line is a high-resistance conductive material.
13. the display panel according to claim 12, wherein the reference voltage line is made of Mo, a highly doped low temperature polysilicon material, or a conductive oxide semiconductor material.
14. A display panel, comprising a display area and a bezel area, the display panel further comprising:
A plurality of reference voltage lines in the display region, the plurality of reference voltage lines being distributed in parallel with the data lines of the display panel;
The voltage supply unit is positioned on a fourth side edge of the frame area, and the first lead is positioned on a third side edge of the frame area, wherein the third side edge is opposite to the fourth side edge;
wherein the reference voltage line is directly electrically connected to the voltage providing unit near a first end of the voltage providing unit, the reference voltage line is electrically connected to the first lead far from a second end of the voltage providing unit, and a potential of the first end of the reference voltage line is higher than a potential of the second end;
for the same display panel, the voltage supply unit supplies the voltage to the first end of the reference voltage line, and the voltage difference between the voltage and the first lead line is a fixed value.
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| CN111463254B (en) * | 2020-04-30 | 2022-04-19 | 武汉天马微电子有限公司 | Display panel and display device |
| CN111968578B (en) * | 2020-08-31 | 2022-07-22 | 合肥维信诺科技有限公司 | Display device |
| WO2023226017A1 (en) * | 2022-05-27 | 2023-11-30 | 京东方科技集团股份有限公司 | Light-emitting substrate and display apparatus |
| CN115148116A (en) * | 2022-06-28 | 2022-10-04 | 武汉天马微电子有限公司 | Display panel and display device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833915A (en) * | 2008-12-04 | 2010-09-15 | 株式会社半导体能源研究所 | Display device, method for driving the same, and electronic device using the display device and the method |
| CN101859541A (en) * | 2010-04-29 | 2010-10-13 | 友达光电股份有限公司 | Organic light emitting diode display |
| CN103383835A (en) * | 2013-07-02 | 2013-11-06 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and display device |
| CN103927968A (en) * | 2013-06-18 | 2014-07-16 | 上海天马微电子有限公司 | OLED display device |
| CN104809988A (en) * | 2015-05-18 | 2015-07-29 | 京东方科技集团股份有限公司 | OLED (Organic Light Emitting Diode) array substrate, display panel and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20160100428A (en) * | 2015-02-13 | 2016-08-24 | 삼성디스플레이 주식회사 | Voltage drop compensating device and display device having the same |
-
2017
- 2017-11-14 CN CN201711123636.5A patent/CN107644621B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101833915A (en) * | 2008-12-04 | 2010-09-15 | 株式会社半导体能源研究所 | Display device, method for driving the same, and electronic device using the display device and the method |
| CN101859541A (en) * | 2010-04-29 | 2010-10-13 | 友达光电股份有限公司 | Organic light emitting diode display |
| CN103927968A (en) * | 2013-06-18 | 2014-07-16 | 上海天马微电子有限公司 | OLED display device |
| CN103383835A (en) * | 2013-07-02 | 2013-11-06 | 京东方科技集团股份有限公司 | Pixel circuit, display panel and display device |
| CN104809988A (en) * | 2015-05-18 | 2015-07-29 | 京东方科技集团股份有限公司 | OLED (Organic Light Emitting Diode) array substrate, display panel and display device |
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|---|---|
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