Patent Application
20160260404
The present disclosure relates to the field of display technology, in particular to a gate driving circuit, a method for driving the same, and a display device.
With a resolution of a display panel being increased, the number of gate scanning lines is also being increased. Taking a high resolution (HD), dual gate designed liquid crystal display (LCD) panel as an example, the number of gate scanning lines thereof is 768×2=1536, so that two gate driving circuit chips each having 768 pulse signal input ends are required, so as to correspond to the gate scanning lines. It can be seen that when the number of gate scanning lines is increased, the number of the gate driving circuit chips is also increased, so that a cost of manufacturing the display panel is increased correspondingly.
Moreover, since a space of a fan-out area located at a junction of an array substrate and the gate driving circuit chip is relatively small, if wires arranged on the fan-out area are too close, a short circuit or open circuit or other defects may occur easily because of an existence of small particles and other unexpected factors.
In view of the above, the present disclosure provides a gate driving circuit, a method for driving the same, and a display device, in order to solve the problem that the cost is high due to the need of a plurality of gate driving circuit chips and a short circuit or open circuit or other defects may occur easily in the display device of the related art.
To solve the above technical problem, the present disclosure provides a gate driving circuit, including:
a plurality of gate driving units, each of which is connected to a pulse signal input end, a timing control signal input end and at least two adjacent gate scanning lines respectively, and configured to sequentially provide the at least two adjacent gate scanning lines connected thereto with a pulse signal inputted by the pulse signal input end under a control of a timing control signal inputted by the timing control signal input end;
wherein the pulse signal input end is connected to a gate driver which outputs the pulse signal based on a number of gate scanning lines corresponding to each of the gate driving units.
Moreover, each of the gate driving units may include at least two sub-gate driving units, each of which is connected to a gate scanning line, the sub-gate driving unit including:
a switch unit, which is connected to a corresponding pulse signal input end and a corresponding gate scanning line, and configured to input the pulse signal inputted by the corresponding pulse signal input end into the gate scanning line connected thereto under the control of the timing control signal;
a reset switch unit, which is connected to the timing control signal input end and the corresponding gate scanning line, and configured to reset the pulse signal of the gate scanning line connected thereto under the control of the timing control signal.
Moreover, each of the gate driving units may be connected to two adjacent gate scanning lines; the timing control signal input end may include: a first timing control signal input end and a second timing control signal input end;
each of the gate driving units may include a first sub-gate driving unit and a second sub-gate driving unit, wherein
the first sub-gate driving unit may include:
a first switch unit, an input end of which is connected to the corresponding pulse signal input end, an output end of which is connected to a first gate scanning line of the two adjacent gate scanning lines, and a control end of which is connected to the second timing control signal input end; which is configured to input the pulse signal inputted by the corresponding pulse signal input end into the first gate scanning line, under a control of a second timing control signal inputted by the second timing control signal input end;
a first reset switch unit, an input end of which is connected to the second timing control signal input end, an output end of which is connected to the first gate scanning line, and a control end of which is connected to the first timing control signal input end; which is configured to reset the pulse signal of the first gate scanning line under a control of the first timing control signal inputted by the first timing control signal input end;
the second sub-gate driving unit may include:
a second switch unit, an input end of which is connected to the corresponding pulse signal input end, an output end of which is connected to a second gate scanning line of the two adjacent gate scanning lines, and a control end of which is connected to the first timing control signal input end; which is configured to input the pulse signal inputted by the corresponding pulse signal input end into the second gate scanning line, under a control of a first timing control signal;
a second reset switch unit, an input end of which is connected to the first timing control signal input end, an output end of which is connected to the second gate scanning line, and a control end of which is connected to the second timing control signal input end; which is configured to reset the pulse signal of the second gate scanning line under a control of the second timing control signal.
Moreover, the first switch unit, the second switch unit, the first reset switch unit and the second reset switch unit may be N-type thin film transistors (TFTs).
Moreover, the gate driving circuit may further include:
a timing control signal generating circuit, which is connected to the timing control signal input end and configured to provide the first timing control signal and the second timing control signal, wherein the timing control signal generating circuit may include:
a thin film transistor T11, a gate electrode of which is connected to a first clock signal, a source electrode of which is connected to a high level signal, a drain electrode of which is connected to the second timing control signal input end;
a thin film transistor T12, a gate electrode of which is connected to the first clock signal, a source electrode of which is connected to a low level signal, a drain electrode of which is connected to the second timing control signal input end;
a thin film transistor T13, a gate electrode of which is connected to a first clock signal, a source electrode of which is connected to the high level signal, a drain electrode of which is connected to the first timing control signal input end;
a thin film transistor T14, a gate electrode of which is connected to the first clock signal, a source electrode of which is connected to the low level signal, a drain electrode of which is connected to the first timing control signal input end;
wherein the thin film transistor T11 and the thin film transistor T14 may be N-type thin film transistors, the thin film transistor T12 and the thin film transistor T13 may be P-type thin film transistors.
Moreover, the gate driving circuit may further include:
a frequency dividing unit, which is connected to the second clock signal and configured to perform a frequency dividing process on the second clock signal, to obtain and then output the first clock signal, a frequency of which is a half of that of the second clock signal;
the gate driver may be connected to the frequency dividing unit and configured to output the pulse signal based on the first clock signal and the number of gate scanning lines corresponding to the gate driving unit.
Moreover, the present disclosure further provides a display device including the above gate driving circuit.
Moreover, the present disclosure further provides a method for driving a gate driving circuit. The gate driving circuit may include a plurality of gate driving units, each of which is connected to a pulse signal input end, a timing control signal input end and at least two adjacent gate scanning lines respectively, wherein the pulse signal input end is connected to a gate driver. The method may include steps of: providing sequentially, by each of the gate driving units, at least two adjacent gate scanning lines connected thereto with a pulse signal inputted by the pulse signal input end, under a control of a timing control signal inputted by the timing control signal input end; and outputting, by the gate driver, the pulse signal based on a number of gate scanning lines corresponding to each of the gate driving units.
The advantageous effects of the above-described technical solutions according to the present disclosure are as follows.
The gate driving circuit includes a plurality of gate driving units, each of which is connected to a pulse signal input end and at least two adjacent gate scanning lines, so that the pulse signal input end may control at least two adjacent gate scanning lines, i.e., control at least two rows of pixel TFT arrays to be turned on or off. Therefore, it is possible to reduce the number of the pulse signal input ends at the same time of achieving a normal display of the display panel, thereby reducing the volume and the manufacture process difficulty of the gate driving circuit and reducing the number of the gate driving circuits required by the panel. Further, since the number of the pulse signal input ends is reduced, a density of wires arranged on the fan-out area located at the junction of the array substrate and the gate driving circuit may also be reduced, so that a probability of an occurrence of the short circuit or open circuit or other defects may be reduced as well.
In order to more clearly illustrate the technical solutions according to the embodiments of the present disclosure or the related art, accompany drawings acquired to use in the description of the embodiments will be described briefly below. It is obvious that, the described drawings are merely parts of embodiments of the present disclosure, and other drawings can also be obtained according to these drawings for a person skilled in the art without creative work.
Specific embodiments of the present disclosure will be further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used for illustrating the present disclosure, but are not intended to limit the scope of the disclosure.
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions according to the embodiments of the present disclosure will be clearly and fully described hereinafter in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are merely parts of embodiments of the present disclosure, but not all the embodiments. Based on the embodiments in the present disclosure, all the other embodiments obtained by a person skilled in the art will fall within the protection scope of the present disclosure.
Unless otherwise defined, technical terms or scientific terms used herein shall have the general meaning which can be understood by a person skilled in the art. The terms “first”, “second” or the like used in the specification and claims of the present disclosure do not denote any sequence, quantity, or importance, but rather are used to distinguish different components. Similarly, the terms “a” or “an” or the like do not mean quantitative restrictions, but rather indicate the presence of at least one. The terms “connect” or “couple” or the like are not limited to connect physically or mechanically, but may include connecting electrically either directly or indirectly. The terms “up”, “down”, “left”, “right”, etc., are merely used to indicate a relative positional relationship; when the absolute position of the described object is changed, the relative positional relationship is changed correspondingly.
In order to make the technical problems, technical solutions and advantages of the embodiments of the present disclosure more clear, description will be given below in conjunction with the accompanying drawings and specific embodiments.
In order to solve the problem that the cost is high due to the need of a plurality of gate driving circuit chips and a short circuit or open circuit or other defects may occur easily in the display device of the related art, an embodiment of the present disclosure provides a gate driving circuit, including:
a plurality of gate driving units, each of which is connected to a pulse signal input end, a timing control signal input end and at least two adjacent gate scanning lines respectively, and configured to sequentially provide the at least two adjacent gate scanning lines connected thereto with a pulse signal inputted by the pulse signal input end under a control of a timing control signal inputted by the timing control signal input end;
wherein the pulse signal input end is connected to a gate driver, each of which outputs the pulse signal based on a number of gate scanning lines corresponding to the gate driving units.
The pulse signal input end 202 is connected to a gate driver which outputs the pulse signal based on a total number (N) of gate scanning lines, Gate1 . . . GateN, corresponding to the gate driving units.
Here, N and M are both positive integers.
It can be seen from the embodiment as shown in
Next, a structure of the gate driving unit in the above-described embodiment will be specifically described.
In an embodiment of the present disclosure, each of the gate driving units may include at least two sub-gate driving units, each of which is connected to a gate scanning line.
The sub-gate driving unit includes:
a switch unit, which is connected to a corresponding pulse signal input end and a corresponding gate scanning line, and configured to input the pulse signal inputted by the corresponding pulse signal input end into the gate scanning line connected thereto under the control of the timing control signal;
a reset switch unit, which is connected to the timing control signal input end and the corresponding gate scanning line, and configured to reset the pulse signal of the gate scanning line connected thereto under the control of the timing control signal.
Description will be given with an example where each of the gate driving units may be connected to two adjacent gate scanning lines. In this case, the timing control signal input end may include: a first timing control signal input end and a second timing control signal input end.
Each of the gate driving units may include a first sub-gate driving unit and a second sub-gate driving unit.
The first sub-gate driving unit may include:
a first switch unit, an input end of which is connected to the corresponding pulse signal input end, an output end of which is connected to a first gate scanning line of the two adjacent gate scanning lines, and a control end of which is connected to the second timing control signal input end; which is configured to input the pulse signal inputted by the corresponding pulse signal input end into the first gate scanning line, under a control of a second timing control signal inputted by the second timing control signal input end;
a first reset switch unit, an input end of which is connected to the second timing control signal input end, an output end of which is connected to the first gate scanning line, and a control end of which is connected to the first timing control signal input end; which is configured to reset the pulse signal of the first gate scanning line under a control of the first timing control signal inputted by the first timing control signal input end.
The second sub-gate driving unit may include:
a second switch unit, an input end of which is connected to the corresponding pulse signal input end, an output end of which is connected to a second gate scanning line of the two adjacent gate scanning lines, and a control end of which is connected to the first timing control signal input end; which is configured to input the pulse signal inputted by the corresponding pulse signal input end into the second gate scanning line, under a control of a first timing control signal;
a second reset switch unit, an input end of which is connected to the first timing control signal input end, an output end of which is connected to the second gate scanning line, and a control end of which is connected to the second timing control signal input end; which is configured to reset the pulse signal of the second gate scanning line under a control of the second timing control signal.
The gate driving circuit includes: a plurality of gate driving units 201, each of which is connected to a pulse signal (channel1, channel2 . . . ) input end, a first timing control signal (ts1) input end, a second timing control signal (ts2) input end and two adjacent gate scanning lines (Gates), respectively; and configured to sequentially provide the two adjacent gate scanning lines connected thereto with a pulse signal inputted by the pulse signal input end under a control of a timing control signal inputted by the timing control signal input end.
Each of the gate driving units includes a first sub-gate driving unit and a second sub-gate driving unit.
The first sub-gate driving unit includes:
a first switch unit T1, an input end of which is connected to the corresponding pulse signal input end, an output end of which is connected to a first gate scanning line of the two adjacent gate scanning lines, and a control end of which is connected to the second timing control signal input end; which is configured to input the pulse signal inputted by the corresponding pulse signal input end into the first gate scanning line, under a control of a second timing control signal inputted by the second timing control signal input end;
a first reset switch unit Reset1, an input end of which is connected to the second timing control signal input end, an output end of which is connected to the first gate scanning line, and a control end of which is connected to the first timing control signal input end; which is configured to reset the pulse signal of the first gate scanning line under a control of the first timing control signal inputted by the first timing control signal input end.
The second sub-gate driving unit includes:
a second switch unit T2, an input end of which is connected to the corresponding pulse signal input end, an output end of which is connected to a second gate scanning line of the two adjacent gate scanning lines, and a control end of which is connected to the first timing control signal input end; which is configured to input the pulse signal inputted by the corresponding pulse signal input end into the second gate scanning line, under a control of a first timing control signal;
a second reset switch unit Reset2, an input end of which is connected to the first timing control signal input end, an output end of which is connected to the second gate scanning line, and a control end of which is connected to the second timing control signal input end; which is configured to reset the pulse signal of the second gate scanning line under a control of the second timing control signal.
Description will be given with an example where the first switch unit, the second switch unit, the first reset switch unit and the second reset switch unit are all N-type thin film transistors (TFTs).
It can be seen from the embodiment as shown in
In order to provide timing control signals, the gate driving circuit according to an embodiment of the present disclosure may also include:
a timing control signal generating circuit, which is connected to the timing control signal input end and configured to provide the first timing control signal and the second timing control signal.
a thin film transistor T11, a gate electrode of which is connected to a first clock signal CPV′, a source electrode of which is connected to a high level signal VGH, a drain electrode of which is connected to the second timing control signal (ts2) input end;
a thin film transistor T12, a gate electrode of which is connected to the first clock signal CPV′, a source electrode of which is connected to a low level signal VGL, a drain electrode of which is connected to the second timing control signal (ts2) input end;
a thin film transistor T13, a gate electrode of which is connected to a first clock signal CPV′, a source electrode of which is connected to the high level signal VGH, a drain electrode of which is connected to the first timing control signal (ts1) input end;
a thin film transistor T14, a gate electrode of which is connected to the first clock signal CPV′, a source electrode of which is connected to the low level signal VGL, a drain electrode of which is connected to the first timing control signal (ts1) input end.
The thin film transistor T11 and the thin film transistor T14 are N-type thin film transistors, the thin film transistor T12 and the thin film transistor T13 are P-type thin film transistors.
It is obvious that the timing control signal generating circuit can also have other structures, which will not be described here.
Referring to
a frequency dividing unit, connected to the second clock signal CPV and configured to perform a frequency dividing process on the second clock signal CPV, to obtain and then output the first clock signal CPV′. A frequency of the first clock signal CPV′ is a half of that of the second clock signal CPV.
Further, the gate driver is connected to the frequency dividing unit and configured to output the pulse signal based on the first clock signal CPV′ and the number of gate scanning lines corresponding to the gate driving unit.
Based on the above frequency dividing unit, the clock signal CPV′ of the embodiment of the present disclosure can be obtained by using an existing clock signal CPV for driving gate scanning lines, thereby there is no need to change the Printed Circuit Board+Assembly (PCBA) which provides gate electrode scanning clock signals, so as to reduce the modification difficulty.
The present disclosure further provides a display device including the above gate driving circuit.
The present disclosure further provides a method for driving a gate driving circuit. The gate driving circuit may include a plurality of gate driving units, each of which is connected to a pulse signal input end, a timing control signal input end and at least two adjacent gate scanning lines respectively, wherein the pulse signal input end is connected to a gate driver. The method may include steps of:
providing sequentially, by each of the gate driving units, at least two adjacent gate scanning lines connected thereto with a pulse signal inputted by the pulse signal input end, under a control of a timing control signal inputted by the timing control signal input end; and
outputting, by the gate driver, the pulse signal based on a number of gate scanning lines corresponding to each of the gate driving units.
The above is only preferred embodiments of the present disclosure, it should be noted that several improvements and modifications may be made for a person skilled in the art without departing from the principle of the present disclosure, and also should be considered to fall within the protection scope of the present disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201310699061.7 | Dec 2013 | CN | national |
This application is the U.S. national phase of PCT Application No. PCT/CN2014/081554 filed on Jul. 3, 2014, which claims priority to Chinese Patent Application No. 201310699061.7 filed on Dec. 18, 2013, the disclosures of which are incorporated in their entirety by reference herein.
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2014/081554 | 7/3/2014 | WO | 00 |
