CN104809976A - Display panel and display device - Google Patents
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- CN104809976A CN104809976A CN201510263098.4A CN201510263098A CN104809976A CN 104809976 A CN104809976 A CN 104809976A CN 201510263098 A CN201510263098 A CN 201510263098A CN 104809976 A CN104809976 A CN 104809976A
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Abstract
The invention provides a display panel and a display device, and relates to the technical field of display. The problem that voltage signal voltage drops received by gird lines or data lines on different positions of an existing display panel are different is solved. The display panel comprises a plurality of signal lines and at least one drive circuit module, wherein the drive circuit module comprises a plurality of output ends; each signal line comprises an input end; one output end of each drive circuit module is connected with an input end of one signal line to input a drive signal to the signal line; a transistor is connected between the output end of the drive circuit module and the input end of each signal line through a connecting line, and the transistor comprises a control end, a first end and a second end; the control end is used for receiving a control signal; the first end is connected with the output end of the drive circuit module, and the second end is connected with the input end of each signal line; a ratio of the length of the connecting line between the output end of the drive circuit module and the input end of each signal line to the width of the transistor is in positive correlation. The invention is applied to the display panel and the display device.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
As shown in fig. 1, the conventional display panel generally includes a plurality of gate lines 11(G1-G5) and a plurality of data lines 12(D1-D5), wherein the gate lines 11 and the data lines 12 cross each other in a transverse and longitudinal direction to define a plurality of display cells, each of which includes a pixel electrode 13 and a thin film transistor 14, wherein the gate electrode G of the thin film transistor 14 is connected to the gate line 11, the source electrode S is connected to the data line 12, and the drain electrode D is connected to the pixel electrode 13. The display of each display cell is controlled by inputting voltage signals to the different gate lines 11 and data lines 12.
As shown in fig. 1, the voltage signal of the gate line 11 on the display panel is input through the gate driving circuit C1, and the voltage signal of the data line 12 is input through the source driving circuit C2. Since the control circuit has a high integration level, one gate driving circuit inputs voltage signals to the plurality of gate lines (G1-G5), respectively, and one source driving circuit inputs voltage signals to the plurality of data lines (D1-D5), respectively. Taking the example that the gate driving circuit C1 inputs voltage signals to the gate lines G1-G5, due to the position relationship of the gate driving circuit C1, the lengths of the connecting wires at the input ends of different gate lines and the output end of the driving circuit are different, and the voltage drops of the voltage signals received by the gate lines at different positions are different. Specifically, as shown in fig. 1, the gate driving circuit C1 is closer to the gate line G3, the length of the connection conducting wire between the input end of the gate line G3 and the output end of the driving circuit is shorter, and the voltage drop of the voltage signal received by the gate line G3 is small; the gate driving circuit C1 is far from the gate line G1, so that the length of the connecting wire between the input end of the gate line G1 and the output end of the driving circuit is short, and the voltage drop of the voltage signal received by the gate line G1 is large, thereby causing the voltage signal received by the gate line at different positions to have deviation, and reducing the display reality.
Disclosure of Invention
Embodiments of the present invention provide a display panel and a display device, which solve the problem of different voltage drops of voltage signals received by gate lines or data lines at different positions of the existing display panel.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the embodiment of the invention provides a display panel, which comprises a plurality of signal lines and at least one driving circuit module, wherein the driving circuit module comprises a plurality of output ends, the signal lines comprise input ends, one output end of the driving circuit module is connected with the input end of one signal line, and a driving signal is input into the signal line; a transistor is connected between the output end of the driving circuit module and the input end of the signal line through a connecting line, the transistor comprises a control end, a first end and a second end, the control end is used for receiving a control signal, the first end is connected with the output end of the driving circuit module, and the second end is connected with the input end of the signal line;
the length of a connection line between the output terminal of the driving circuit module and the input terminal of the signal line is positively correlated with the width-to-length ratio of the transistor.
The embodiment of the invention provides a display device which comprises any one of the display panels provided by the embodiment of the invention.
An embodiment of the present invention provides a display panel and a display device, the display panel including a plurality of signal lines and at least one driving circuit module, the longer a connection line between an output terminal of the driving circuit module and an input terminal of the signal line is connected by a connection line between an output terminal of the transistor driving circuit module and an input terminal of the signal line, the larger the resistance of the connection line is, and in the embodiment of the present invention, the length of the connection line between the output terminal of the driving circuit module and the input terminal of the signal line is positively correlated with the width-to-length ratio of the transistor, because the larger the width-to-length ratio of the transistor is, the larger the current output by the transistor is, thereby compensating the problem that the long-distance voltage drop of the connecting wire is larger, namely, the embodiment of the invention adjusts the problem of different voltage drops of the driving signals input at the input end of the signal wire caused by different lengths among different connecting wires by adjusting the width-to-length ratio of the transistor. In addition, the voltage drop is adjusted through the transistor, and the driving circuit module and the transistor are located in a frame area of the display panel due to the fact that the transistor is small in size, so that the narrow frame design can be achieved.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a conventional display panel;
fig. 2 is a schematic diagram of a thin film transistor according to an embodiment of the present invention;
fig. 3 is a schematic view of a display panel according to an embodiment of the invention;
FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present invention;
fig. 5 is a schematic diagram of transistors corresponding to the driving circuit module shown in fig. 4 according to an embodiment of the present invention;
fig. 6 is a schematic diagram of transistors of another driving circuit module corresponding to the driving circuit module shown in fig. 4 according to an embodiment of the present invention;
fig. 7 is a schematic diagram of transistors of another driving circuit module corresponding to the driving circuit module shown in fig. 4 according to an embodiment of the invention;
FIG. 8 is a schematic view of another display panel according to an embodiment of the present invention;
fig. 9 is a schematic view of another display panel according to an embodiment of the invention.
Reference numerals:
11-a gate line; 12-a data line; 13-pixel electrode; 14-a thin film transistor; 15-a transistor; 21-a first wire; 22-a second wire; 30-a control line; 100-a drive circuit; 200-signal lines.
Detailed Description
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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
In order to more conveniently understand the technical solution of the present application, referring to fig. 2, a structure of a thin film transistor in the prior art is taken as an example and includes a control terminal G, a first terminal S and a second terminal D. Wherein, the width W of the thin film transistor channel is the sum of the lengths of the opposite surfaces of the first end S and the second end D, and the length L of the thin film transistor channel is the relative distance between the first end S and the second end D.
Specifically, the calculation formula of the on-state current of the thin film transistor is as follows: <math>
<mrow>
<mi>Ion</mi>
<mo>=</mo>
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
<mi>μC</mi>
<mfrac>
<mi>W</mi>
<mi>L</mi>
</mfrac>
<msup>
<mrow>
<mo>(</mo>
<mi>Vg</mi>
<mo>-</mo>
<mi>Vt</mi>
<mo>)</mo>
</mrow>
<mn>2</mn>
</msup>
<mo>,</mo>
</mrow>
</math>
where Ion is an on-state current, μ is a carrier mobility, C is a gate (control terminal) capacitance of a TFT (Thin film transistor), W is a width of a TFT channel, L is a length of the TFT channel, Vg is a TFT forward voltage, and Vt is a TFT threshold voltage. It can be seen from the equation that the on-state current increases with the increase of the width-to-length ratio of the TFT channel, i.e., W/L, without changing other parameters.
An embodiment of the present invention provides a display panel, as shown in fig. 3, including a plurality of signal lines (signal lines S1-S5), and at least one driving circuit module 100, where the driving circuit module 100 includes a plurality of output terminals (output terminals P1-P5), the signal line 200 includes an input terminal (signal lines S1-S5 include input terminals I1-I5, respectively), one output terminal of the driving circuit module 100 is connected to an input terminal of one signal line 200, and inputs a driving signal to the signal line 200; a transistor 15 is connected between the output end of the driving circuit module 100 and the input end of the signal line 200 by a connection line, the transistor 15 includes a control end G, a first end S and a second end D, wherein the control end G is used for receiving a control signal, the first end S is connected with the output end of the driving circuit module 100, and the second end D is connected with the input end of the signal line 200;
the length of the connection line between the output terminal of the driving circuit module 100 and the input terminal of the signal line 200 is positively correlated with the width-to-length ratio of the transistor 15.
Specifically, as shown in fig. 3, taking the example that the display panel 100 includes five output terminals P1-P5, the signal lines S1-S5 respectively include one input terminal I1-I5, wherein the output terminal P1 is connected to the corresponding input terminal I1, a driving signal is input to the signal line S1, a transistor 15 is further formed between the output terminal P1 and the input terminal I1, the output terminal P1 is connected to a first terminal S of the transistor through a first connection line 21, and the input terminal I1 is directly connected to a second terminal D of the transistor; similarly, the output terminal P2 is connected to the corresponding input terminal I2, a drive signal is input to the signal line S2, a transistor 15 is further formed between the output terminal P1 and the input terminal I1, the output terminal P1 is connected to a first terminal S of the transistor through a first connection line 21, and the input terminal I1 is directly connected to a second terminal D of the transistor. The length of the connection line between the output terminal of the above-described driving circuit module and the input terminal of the signal line is specifically the length of the first connection line 21.
The length of the connecting line between the output end of the driving circuit module and the input end of the signal line is positively correlated with the width-to-length ratio of the transistor, that is, the longer the connecting line between the output end of the driving circuit module and the input end of the signal line is, the larger the width-to-length ratio of the transistor between the output end of the driving circuit module and the input end of the signal line is. Specifically, as shown in fig. 3, the first connection line 21 between the output terminal P1 and the input terminal I1 is larger than the first connection line 21 between the output terminal P2 and the input terminal I2, and the width-to-length ratio of the transistor 15 between the output terminal P1 and the input terminal I1 is larger than the width-to-length ratio of the transistor 15 between the output terminal P2 and the input terminal I2. Similarly, the first connection line 21 between the output terminal P2 and the input terminal I2 is larger than the first connection line 21 between the output terminal P3 and the input terminal I3, and the width-to-length ratio of the transistor 15 between the output terminal P2 and the input terminal I2 is larger than the width-to-length ratio of the transistor 15 between the output terminal P3 and the input terminal I3.
The display panel provided by the embodiment of the invention comprises a plurality of signal lines and at least one driving circuit module, wherein the longer the connecting line between the output end of the driving circuit module and the input end of the signal line, which is connected with the output end of the transistor driving circuit module and the input end of the signal line through the connecting line, the larger the resistance of the connecting line, in the embodiment of the invention, the length of the connecting line between the output end of the driving circuit module and the input end of the signal line is positively correlated with the width-length ratio of the transistor, and the larger the width-length ratio of the transistor is, the larger the output current is, so that the problem of larger voltage drop of the length of the connecting line is compensated, namely, the problem of different voltage drops of driving signals input by the input end of the signal line, which are caused by different lengths, among different connecting lines. In addition, the voltage drop is adjusted through the transistor, and the driving circuit module and the transistor are located in a frame area of the display panel due to the fact that the transistor is small in size, so that the narrow frame design can be achieved.
Preferably, as shown in fig. 4, the first terminal S is connected to the output terminal of the driving circuit module 100 by a first connection line 21, and the second terminal D is connected to the input terminal of the signal line 200 by a second connection line 22; the connection lines between the output terminal of the driving module 100 and the input terminal of the connection line 200 include a first connection line 21 and a second connection line 22. The positive correlation between the length of the connection line between the output terminal of the driving circuit 100 and the input terminal of the signal line 200 and the width-to-length ratio of the transistors is specifically: the sum of the lengths of the first connection line 21 and the second connection line 22 is positively correlated with the width-to-length ratio of the transistor 15.
Specifically, as shown in fig. 4, the sum of the lengths of the first connection line 21 and the second connection line 22 between the output terminal P1 and the input terminal I1 is greater than the sum of the lengths of the first connection line 21 and the second connection line 22 between the output terminal P2 and the input terminal I2, and the width-to-length ratio of the transistor 15 between the output terminal P1 and the input terminal I1 is greater than the width-to-length ratio of the transistor 15 between the output terminal P2 and the input terminal I2.
It should be noted that a transistor is connected between the output end of the driving circuit module and the input end of the signal line through a connection line, and the position of the specific transistor between the output end of the driving circuit module and the input end of the signal line does not affect the effect of adjusting the voltage drop of the whole circuit.
Optionally, the positive correlation between the length of the connection line between the output end of the driving circuit module and the input end of the signal line and the width-length ratio of the transistor specifically includes: the width of each transistor corresponding to the driving circuit module is the same, and the length of the connecting line between the output end of the driving circuit and the input end of the signal line is larger, and the length of the transistor is smaller. Specifically, as shown in fig. 5, the output terminals P1-P5 of the driving circuit module 100 have the same width W as the transistors of the signal lines I1-I5, and the lengths thereof are L1-L5. That is, the larger the length of the connection line between the output end of the driving circuit module and the input end of the signal line is, the smaller the length L of the corresponding transistor is, and the larger the on-state current of the transistor is.
Or,
the lengths of the transistors corresponding to the driving circuit modules are the same, and the larger the length of a connecting line between the output end of the driving circuit and the input end of the signal line is, the larger the width of the transistor is. Specifically, as shown in fig. 6, the output terminals P1-P5 of the driving circuit module 100 are the same as the length L of each transistor of the signal lines I1-I5, and the width thereof is W1-W5. That is, the larger the length of the connection line between the output end of the driving circuit module and the input end of the signal line is, the larger the width of the corresponding transistor is, and the larger the on-state current of the transistor is.
Optionally, the first end is in a ring shape with an opening, and the second end extends into the ring shape from the opening; the larger the length of a connecting line between the output end of the driving circuit module and the input end of the signal line is, the larger the length of the second end extending into the ring is, wherein the larger the length of the second end input ring is, which is equivalent to the larger the width of the transistor is, the larger the on-state current of the transistor is; or the second end is in a ring shape with an opening, and the first end extends into the ring shape from the opening; the larger the length of a connecting line between the output end of the driving circuit module and the input end of the signal line is, the larger the length of the first end extending into the ring is, wherein the larger the length of the second end input ring is, which means that the larger the width of the transistor is, the larger the on-state current of the transistor is.
As shown in fig. 7, taking the first terminal S as a ring with an opening, and the second terminal D extending from the opening into the ring as an example, the output terminals P1-P5 of the driving circuit module 100 and the transistors of the signal lines I1-I5 have lengths of H1-H5. That is, the larger the length of the connection line between the output end of the driving circuit module and the input end of the signal line is, the larger the length of the second end of the corresponding transistor extending into the ring shape is, and the larger the on-state current of the transistor is.
It should be noted that the aspect ratio of the transistor can be adjusted in many different ways, and the embodiment of the present invention is described only by taking the example shown in fig. 5 to fig. 7 as an example.
Preferably, as shown in fig. 3 and 4, the control terminal G of each transistor 15 corresponding to the driving circuit module 100 is connected to the same control line 30 to receive the control signal. Therefore, the number of the flat cables on the display panel can be further reduced, the occupied area of a circuit area is reduced, and the product design with a narrower frame is facilitated.
Optionally, the display panel includes at least two driving circuit modules. As shown in fig. 8, the display panel includes two driving circuits 100, and the control terminal G of each transistor 15 corresponding to each driving circuit 100 is connected to the same control line 30. Therefore, the problem of signal difference caused by product difference of different driving circuits can be solved by adjusting the control signals corresponding to the different driving circuits. For example, the display panel includes a first driving circuit and a second driving circuit, and the voltage signal output by the first driving circuit is greater than the voltage signal output by the second driving circuit, then the control voltage output to each transistor by the control line corresponding to the first driving circuit may be smaller than the control voltage output to each transistor by the control line corresponding to the second driving circuit by adjusting the control line corresponding to the first driving circuit and the control line corresponding to the second driving circuit, so that the magnitude of the driving signal output by the signal line receiving the first driving circuit and the second driving circuit is close.
Optionally, the plurality of signal lines include a plurality of gate lines, and the display panel includes at least one gate driving circuit module for providing a scan signal to the gate lines; and/or the presence of a gas in the gas,
the plurality of signal lines include a plurality of data lines, and the display panel includes at least one source driving circuit module supplying a data signal to the data lines.
That is, as shown in fig. 9, the driving circuit module according to the embodiment of the invention may be the gate driving circuit C1, and then the gate driving circuit C1 provides the scan signal to the gate line 11. The driving circuit module provided by the embodiment of the invention may also be the source driving circuit C2, and the source driving circuit C2 provides the data signal to the data line 12. In addition, for the display panel, the number of the gate driving circuit modules and the source driving circuit modules included in the display panel is not particularly limited in the embodiments of the present invention.
Preferably, as shown in fig. 9, the transistor 15 connected between the output terminal of the driving circuit module 100 and the input terminal of the signal line 200 is a first thin film transistor; the display panel further includes a plurality of display cells, each of which includes a second thin film transistor (i.e., the thin film transistor 14), and the first thin film transistor (i.e., the transistor 15) is formed simultaneously with the second thin film transistor (i.e., the thin film transistor 14). When the array substrate is formed, the second thin film transistor is formed on each display unit in the display area, and the first thin film transistor is formed in the circuit binding area around the display area, so that the manufacturing process is simplified.
The embodiment of the invention provides a display device which comprises any one of the display panels provided by the embodiment of the invention. The display device can be electronic paper, a mobile phone, a television, a digital photo frame and other display equipment.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (9)
1. A display panel comprises a plurality of signal lines and at least one driving circuit module, wherein the driving circuit module comprises a plurality of output ends, the signal lines comprise input ends, one output end of the driving circuit module is connected with the input end of one signal line, and a driving signal is input into the signal line; the driving circuit module is characterized in that a transistor is connected between the output end of the driving circuit module and the input end of the signal line through a connecting line, the transistor comprises a control end, a first end and a second end, the control end is used for receiving a control signal, the first end is connected with the output end of the driving circuit module, and the second end is connected with the input end of the signal line;
the length of a connection line between the output terminal of the driving circuit module and the input terminal of the signal line is positively correlated with the width-to-length ratio of the transistor.
2. The display panel according to claim 1, wherein the control terminals of the transistors corresponding to the driving circuit module are connected to a same control line to receive a control signal.
3. The display panel according to claim 2, wherein the display panel comprises at least two driving circuit modules.
4. The display panel according to claim 1, wherein the first terminal is connected to an output terminal of the driver circuit module by a first connection line, and the second terminal is connected to an input terminal of the signal line by a second connection line;
the positive correlation between the length of the connecting line between the output end of the driving circuit and the input end of the signal line and the width-length ratio of the transistor is specifically as follows: the sum of the lengths of the first connection line and the second connection line is positively correlated with the width-to-length ratio of the transistor.
5. The display panel according to any one of claims 1 to 4, wherein the plurality of signal lines include a plurality of gate lines, and the display panel includes at least one gate driving circuit module supplying a scan signal to the gate lines; and/or the presence of a gas in the gas,
the plurality of signal lines include a plurality of data lines, and the display panel includes at least one source driving circuit module supplying a data signal to the data lines.
6. The display panel according to claim 1, wherein the transistor connected between the output terminal of the driver circuit module and the input terminal of the signal line is a first thin film transistor; the display panel further comprises a plurality of display units, each display unit comprises a second thin film transistor, and the first thin film transistor and the second thin film transistor are formed simultaneously.
7. The display panel according to claim 1, wherein the positive correlation between the length of the connection line between the output terminal of the driving circuit module and the input terminal of the signal line and the width-to-length ratio of the transistor specifically comprises:
the width of each transistor corresponding to the driving circuit module is the same, and the length of the transistor is smaller when the length of a connecting line between the output end of the driving circuit and the input end of the signal line is larger; or,
the length of each transistor corresponding to the driving circuit module is the same, and the larger the length of a connecting line between the output end of the driving circuit and the input end of the signal line is, the larger the width of the transistor is.
8. The display panel according to claim 1, wherein the first end is a ring shape having an opening, and the second end extends into the ring shape through the opening; the larger the length of a connecting line between the output end of the driving circuit module and the input end of the signal line is, the larger the length of the second end extending into the ring shape is; or the second end is in a ring shape with an opening, and the first end extends into the ring shape from the opening; the greater the length of the connection line between the output terminal of the driving circuit module and the input terminal of the signal line, the greater the length of the first terminal extending into the loop.
9. A display device characterized by comprising the display panel according to any one of claims 1 to 8.
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| CN105976783A (en) * | 2016-07-20 | 2016-09-28 | 深圳市华星光电技术有限公司 | Data signal driving method and driving device |
| CN107437400A (en) * | 2017-09-04 | 2017-12-05 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
| CN109545144A (en) * | 2018-11-27 | 2019-03-29 | 武汉华星光电半导体显示技术有限公司 | A kind of luminance regulating method and device of display panel |
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