Patent Grant
10373547
The disclosure relates to the field of display technology, particularly to a display substrate and a driving method thereof, as well as a display device.
In general display devices, each data line is connected with one column of pixels (the pixel here refers to the minimum unit for performing light emitting control, which corresponds to a minimum area defined by two adjacent data lines and two adjacent gate lines). The data lines are connected to a data voltage input terminal in the fan-out area. In large-scale display devices such as displays, mobile phones, PADs, the headspace of the display device is relatively large, which can provide a relatively large fan-out area, thereby accommodating enough data lines at this position. However, in design of some small special shaped display devices (such as smartwatches), it is required to reduce the headspace significantly. However, in order to accommodate the data lines, the fan-out area cannot be designed too small, which increases design difficulty of the display device.
Therefore, it is desired to provide a display device that can have a relatively small headspace.
In a first aspect, an embodiment of the disclosure provides a display substrate, comprising a base substrate and a plurality of data lines, a plurality of gate lines and a plurality of pixels formed on the base substrate, and having a plurality of data voltage input terminals. The display substrate further comprises a plurality of select switch arrays and a plurality of selecting control circuits formed on the base substrate, and has a plurality of selecting control signal input terminals.
Each select switch array comprises a plurality of select switches. A first terminal of each select switch is connected to a corresponding data line. A second end of each select switch is connected to a same data voltage input terminal. A control terminal of each select switch is connected to a same selecting control circuit. Each data line connected with the select switch array is connected with two columns of pixels, and the gate line connected with pixels of one of the two columns differs from the gate line connected with pixels of the other column.
Each selecting control circuit is connected to a plurality of selecting control signal input terminals and a corresponding select switch array, and is adapted to turn on select switches in the connected select switch array in different times under control of selecting control signals inputted by the selecting control signal input terminals.
According to another embodiment, the selecting control signal input terminals comprise selecting signal input terminals and control signal input terminals.
Each selecting control circuit comprises a plurality of selecting control switch groups. Each selecting control switch group comprising two selecting control switches. First terminals of the two selecting control switches are connected to a control terminal of a same select switch. Second terminals of the two selecting control switches are connected to corresponding selecting signal input terminals respectively. Control terminals of the two selecting control switches are connected to corresponding control signal input terminals respectively. The selecting signal input terminals connected by selecting control switches in each selecting control circuit are different from each other, and the select switches connected by the selecting control switch groups are different from each other.
According to another embodiment, each selecting control circuit corresponds to two control signal input terminals. A control terminal of one selecting control switch in each selecting control switch group is connected with one of the two control signal input terminals, and a control terminal of the other selecting control switch is connected with the other of the two control signal input terminals.
According to another embodiment, the display substrate further comprises a pixel driving circuit and a data voltage write control line formed on the base substrate.
Each pixel comprises one pixel driving circuit. The pixel driving circuit is connected with a data line and a gate line corresponding to the pixel, and connected with the data voltage write control line. The pixel driving circuit is adapted to write a data voltage applied onto a data line connected by the pixel driving circuit into a first node under control of the data voltage write control line, write the data voltage into a second node under control of the gate line, and generate a current for driving the pixel based on a voltage of the second node.
According to another embodiment, one column of pixels and the other column of pixels in two columns of pixels connected to a same data line are in staggered arrangement.
In a second aspect, an embodiment of the disclosure further provides a method of driving the above display substrate, comprising:
when refreshing a plurality of pixels connected by each gate line, for a select switch array connected by the plurality of pixels, applying a selecting control signal on a selecting control signal input terminal connected with a selecting control circuit connected by the select switch array, so as to turn on the select switches in the select switch array in different times, and when each select switch is turned on, applying a data voltage corresponding to a pixel connected with a data line connected by the select switch on a data voltage input terminal connected by the select switch array; and applying a gate scanning signal on the gate line, so as to write the data voltage applied to the data voltage input terminal into a corresponding pixel.
According to another embodiment, the method further comprises: after receiving pixel data sent by a host, determining a sequence of pixels accessed to the data voltage input terminal according to preset gate line turn-on sequence and select switch turn-on sequence, and rearranging the received pixel data based on the determined sequence.
According to another embodiment, the method further comprises: when applying a data voltage corresponding to a pixel connected with a data line connected by the select switch on the data voltage input terminal connected by the select switch array, applying a control signal on a data voltage write control line connected by the pixel, so as to write the data voltage applied on the data voltage input terminal into a first node.
Applying a gate scanning signal on the gate line so as to write the data voltage applied on the data voltage input terminal into a corresponding pixel comprises:
after the select switches are turned on in different times, applying the gate scanning signal on the gate line, so as to write the data voltage written into the first node of each pixel into a second node of the pixel.
In a third aspect, an embodiment of the disclosure further provides a display driving system, comprising: a selecting driving circuit, a gate driving circuit and a data driving circuit. When refreshing a plurality of pixels connected by each gate line:
The selecting driving circuit is adapted to, for a select switch array connected by the plurality of pixels, apply a selecting control signal on a selecting control signal input terminal connected with the selecting control circuit connected by the select switch array, so as to turn on the select switches in the select switch array in different times.
The data driving circuit is adapted to, when each select switch is turned on, apply a data voltage corresponding to a pixel connected with a data line connected by the select switch on a data voltage input terminal connected by the select switch array.
The gate driving circuit is adapted to apply a gate scanning signal on the gate line, so as to write the data voltage applied on the data voltage input terminal into a corresponding pixel.
According to another embodiment, the data driving circuit comprises a rearrangement module. The rearrangement module is adapted to, after receiving pixel data sent by a host, determine a sequence of pixels accessed to the data voltage input terminal according to preset gate line turn-on sequence and select switch turn-on sequence, and rearrange the received pixel data based on the determined sequence.
According to another embodiment, the system further comprises a logic control circuit. The logic control circuit comprises a rearrangement module. The rearrangement module is adapted to, after receiving pixel data sent by a host, determine a sequence of pixels accessed to the data voltage input terminal according to preset gate line turn-on sequence and select switch turn-on sequence, rearrange the received pixel data based on the determined sequence, and inputting the rearranged data into the data driving circuit.
In a fourth aspect, an embodiment of the disclosure further provides a display device comprising the above display substrate.
In the display substrate provided by an embodiment of the disclosure, each data line is connected with two columns of pixels, and two columns of pixels connected to the same data line are connected with different gate lines. In this way, the number of the data lines used can be reduced greatly in the case of accomplishing the corresponding driving and displaying, which can reduce the area of the fan-out area required for accommodating the data lines, such that the corresponding display device can have a relatively small headspace. Therefore, design difficulty of the corresponding display device can be reduced. Meanwhile, in an embodiment of the disclosure, a plurality of data lines are connected to a same input terminal. That is, the same input terminal is used to drive a plurality of columns of pixels. Therefore, the number of the data driving circuits to be used can be reduced, so as to reduce the manufacture cost of the display device.
Next, the specific implementations of the disclosure will be further described with reference to the drawings and the embodiments. The following embodiments are only used for explaining the technical solutions of the disclosure more clearly, rather than limiting the protection scope of the disclosure.
In a first aspect, an embodiment of the disclosure provides a display substrate, comprising a base substrate and a plurality of data lines, a plurality of gate lines and a plurality of pixels formed on the base substrate, and having a plurality of data voltage input terminals. The display substrate further comprises a plurality of select switch arrays and a plurality of selecting control circuits formed on the base substrate, and has a plurality of selecting control signal input terminals.
Each select switch array comprises a plurality of select switches. A first terminal of each select switch is connected to a corresponding data line. A second end of each select switch is connected to a same data voltage input terminal. A control terminal of each select switch is connected to a same selecting control circuit. Each data line connected with the select switch array is connected with two columns of pixels, and the gate line connected with pixels of one of the two columns differs from the gate line connected with pixels of the other column.
Each selecting control circuit is connected to a plurality of selecting control signal input terminals and a corresponding select switch array, and is adapted to turn on select switches in the connected select switch array in different times under control of selecting control signals inputted by the selecting control signal input terminals.
In the display substrate provided by an embodiment of the disclosure, each data line is connected with two columns of pixels, and two columns of pixels connected to the same data line are connected with different gate lines. In this way, the number of the data lines used can be reduced greatly in the case of accomplishing the corresponding driving and displaying, which can reduce the area of the fan-out area required for accommodating the data lines, such that the corresponding display device can have a relatively small headspace. Therefore, design difficulty of the corresponding display device can be reduced. Meanwhile, in an embodiment of the disclosure, a plurality of data lines are connected to a same data voltage input terminal. That is, the same input terminal is used to drive a plurality of columns of pixels. Therefore, the number of the data driving circuits to be used can be reduced, so as to reduce the manufacture cost of the display device.
In a second aspect, an embodiment of the disclosure further provides a method of driving a display substrate, which can be used for driving the display substrate according to the first aspect. The method comprises:
when refreshing a plurality of pixels connected by each gate line, for a select switch array connected by the plurality of pixels, applying a selecting control signal on a selecting control signal input terminal connected with a selecting control circuit connected by the select switch array, so as to turn on the select switches in the select switch array in different times, and when each select switch is turned on, applying a data voltage corresponding to a pixel connected with a data line connected by the select switch on a data voltage input terminal connected by the select switch array; and applying a gate scanning signal on the gate line, so as to write the data voltage applied to the data voltage input terminal into a corresponding pixel.
In a third aspect, an embodiment of the disclosure further provides a display driving system, comprising: a selecting driving circuit, a gate driving circuit and a data driving circuit. When refreshing a plurality of pixels connected by each gate line:
The selecting driving circuit is adapted to, for a select switch array connected by the plurality of pixels, apply a selecting control signal on a selecting control signal input terminal connected with the selecting control circuit connected by the select switch array, so as to turn on the select switches in the select switch array in different times.
The data driving circuit is adapted to, when each select switch is turned on, apply a data voltage corresponding to a pixel connected with a data line connected by the select switch on a data voltage input terminal connected by the select switch array.
The gate driving circuit is adapted to apply a gate scanning signal on the gate line, so as to write the data voltage applied on the data voltage input terminal into a corresponding pixel.
In specific implementations, the above display substrate may have various specific structures, and the corresponding driving methods and manufacturing methods may also be different from each other, which will be explained in detail with reference to the drawings next.
In addition, in specific implementations, the display substrate provided by an embodiment of the disclosure can comprise a plurality of select switch arrays and a plurality of selecting control circuits. Each select switch array is connected with one data voltage input terminal and one selecting control circuit. Next, explanations will be made in the case that one select switch array is connected to a data voltage input terminal and a selecting control circuit corresponding to it.
Referring to
In addition, the display substrate further comprises select switch arrays and selecting control circuits formed on the base substrate. The select switch array comprises three select switches 101-103. The selecting control circuit comprises six selecting control switches 201-206. The display substrate further has a plurality of selecting control signal input terminals. The selecting control signal input terminals can comprise selecting signal input terminals MUX1, MUX2 . . . MUX6 and control signal input terminals SW_E and SW_O. Each of the three select switches corresponds to one data line, and a first terminal of each select switch is connected to a corresponding data line, a second terminal of each select switch is connected to a data voltage input terminal Data in. For instance, the first terminal of the select switch 101 is connected to the corresponding data line D1, and its second terminal is connected to the data voltage input terminal Data in. The six selecting control switches are divided into three selecting control switch groups. Each selecting control switch group corresponds to one select switch. Each selecting control switch group includes two selecting control switches. First terminals of two selecting control switches that belong to the same selecting control switch group are both connected to a control terminal of a select switch corresponding to them. Second terminals of two selecting control switches that belong to the same selecting control switch group are connected to corresponding selecting signal input terminals respectively. Control terminals of two selecting control switches that belong to the same selecting control switch group are connected to corresponding control signal input terminals respectively. For instance, the first terminals of the two selecting control switches 201 and 202 that belong to the same selecting control switch group are both connected to the control terminal of the select switch 101 corresponding to them. The second terminal of the selecting control switch 201 is connected to the selecting signal input terminal MUX1, and its control terminal is connected to the control signal input terminal SW_O; while the second terminal of the selecting control switch 202 is connected to the selecting signal input terminal MUX4, and its control terminal is connected to the control signal input terminal SW_E.
In specific implementation, the display substrate in
Such a display substrate can be driven in the following way.
When it is required to refresh the nth row of pixels P1-P6 in
From the above driving process it can be seen that, in specific implementation, the sequence of writing the data voltages of the pixels into the pixels is P1-P3-P5-P2-P4-P6. In general, however, the sequence of pixel data sending to the data driving circuit by a host is P1-P2-P3-P4-P5-P6. Hence, in order to write the correct data voltages into the pixels, the above pixel data can be rearranged. Specifically, the rearranging process here can be performed by the data driving circuit. The data driving circuit can comprise a rearrangement module for rearranging the pixel data. The rearrangement module is adapted to, after receiving pixel data sent by a host, determine a sequence of pixels accessed to the data voltage input terminal according to preset gate line turn-on sequence and select switch turn-on sequence, and rearrange the received pixel data based on the determined sequence. Referring to
Here, the process of the above driving method is as shown in
step 501, writing the pixel data into the data driving circuit;
step 502, rearranging the written pixel data by the data driving circuit;
step 503, writing data voltages to pixels of odd columns by the data driving circuit;
step 504, writing data voltages to pixels of even columns by the data driving circuit;
step 505, emitting light for display.
The processes of steps 503 and 504 can be consistent with the driving method as shown in
Alternatively, in specific implementations, the rearrangement module can also be arranged in other circuits, for example, it can be arranged in a logic control circuit (the logic control circuit for example can be FPGA).
The rearrangement module is adapted to, after receiving pixel data sent by a host, determine a sequence of pixels accessed to the data voltage input terminal according to preset gate line turn-on sequence and select switch turn-on sequence, rearrange the received pixel data based on the determined sequence, and input the rearranged data into the data driving circuit. When the pixel data are rearranged using the rearrangement module, the rearrangement result is as shown in
Here, the process of the above driving method is as shown in
step 601, writing the pixel data into the logic control circuit;
step 602, rearranging the written pixel data by the logic control circuit;
step 603, writing the rearranged pixel data into the data driving circuit by the logic control circuit;
step 604, writing data voltages to pixels of odd columns by the data driving circuit;
step 605, writing data voltages to pixels of even columns by the data driving circuit;
step 605, emitting light for display.
Certainly, in actual applications, the above rearranging process can also be performed by the host or other functional modules. The corresponding technical solutions can also implement correct writing of the data voltage. Hence, the corresponding technical solutions should also fall within the protection scope of the disclosure.
It is not difficult to understand that although it is explained in embodiments of the disclosure by taking the display substrate as an AMOLED display substrate, in specific implementation, the display substrate can also be a liquid crystal display substrate. If the display substrate is a liquid crystal display substrate, a gate scanning signal can be applied on the gate line connected by pixels of odd columns while the data driving circuit writes data voltages into the pixels of odd columns. And a gate scanning signal can be applied on the gate line connected by pixels of even columns while the data driving circuit writes data voltages into the pixels of even columns.
Another embodiment of the disclosure further provides another display substrate. The structure of the display substrate is as shown in
In Embodiment Two, since the pixels are in staggered arrangement, the pixel driving circuits arranged in the pixels can be arranged in two rows, and the gate lines can also be arranged in two rows. In this way, mutual interference between the gate lines can be avoided.
In a fourth aspect, an embodiment of the disclosure provides a display device, comprising the above display substrate.
What are stated above are only specific implementations of the disclosure. It should be pointed out that the ordinary skilled person in the art can also make various improvements and modifications without departing from the technical principle of the disclosure. These improvements and modifications should also be regarded as being encompassed within the protection scope of the disclosure.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2015 1 0599760 | Sep 2015 | CN | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/CN2016/073873 | 2/16/2016 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2017/045352 | 3/23/2017 | WO | A |
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| Number | Date | Country | |
|---|---|---|---|
| 20170301278 A1 | Oct 2017 | US |
