CN106710557A - Display device and driving method - Google Patents

Abstract

The present invention provides a display device and a driving method. The display device includes a plurality of pixel units, a plurality of gate lines, a plurality of data lines, a gate driver, a data driver and a timing controller. The plurality of gate lines include a first gate line and a second gate line; the plurality of data lines include a first data line; a gate driver outputs a first scan signal to the first gate line. The electrode line outputs a second scan signal to the second gate line; the timing controller is used to receive a first data signal at a first position of the first data line, and the first data signal is The state transition is performed at a first time point, and the timing controller is further used to receive a second data signal at a second position of the first data line, and the second data signal is transitioned at a second time point. state, the first time point and the second time point have a time difference, wherein the gate driver adjusts the second scan signal according to the time difference.

Description

Display device and driving method

technical field

The present invention relates to a display device and a driving method, in particular to a display device and a driving method capable of improving display uniformity.

Background technique

With the evolution of optoelectronics and semiconductor technology, the vigorous development of displays has been driven. Among many displays, liquid crystal display panels are widely used due to their advantages of low power consumption, thinness, light weight, high color saturation, and long life, and become one of the mainstreams of modern displays.

Conventionally, a liquid crystal display panel may include at least two substrates (which may be referred to as an array substrate and an opposite substrate, respectively). Generally speaking, the array substrate may include a plurality of gate lines and a plurality of pixel units. These pixel units can be arranged in an array, and multiple pixel units in the same row (ie along the extending direction of the gate lines) can be controlled by the same scan signal because they are coupled to the same gate line.

In an ideal state, the voltage of each point on the same gate line should be the same, so that multiple pixel units in the same horizontal row can operate synchronously. However, in the actual state, since each gate line can actually be considered to be composed of a plurality of series resistors, and coupled with the influence of coupling capacitance, each scan signal is transmitted from the input end of the gate line to the gate line. The end will be affected by the resistance-capacitance delay effect (RC Delay), which makes the waveform of the original square wave scanning signal appear rounded. The higher the operating frequency of the panel, the shorter the effective charging time, so it will be more difficult to charge the pixel unit to the predetermined voltage level within the effective charging time, which will affect the display uniformity.

Contents of the invention

Therefore, the present invention provides a display device and a driving method, which can increase the effective charging time and further improve the display uniformity.

An embodiment of the invention provides a display device. The display device includes a plurality of pixel units; a plurality of gate lines electrically connected to the plurality of pixel units, and the plurality of gate lines include a first gate line and a second gate line; a plurality of data lines, Intersecting the plurality of gate lines, the plurality of data lines include a first data line; a gate driver for outputting a first scan signal to the first gate line and outputting a second scan signal a signal to the second gate line; a data driver electrically connected to the plurality of data lines; and a timing controller for receiving a first data signal at a first position of the first data line , the first data signal transitions at a first time point, the timing controller is further used to receive a second data signal at a second position of the first data line, the second data signal Transition is performed at a second time point, the first time point and the second time point have a time difference, wherein the gate driver adjusts the second scan signal according to the time difference.

An embodiment of the present invention provides a driving method suitable for a display device, including: receiving a first data signal at a first position of a first data line, and the first data signal is performed at a first time point Transition: receiving a second data signal at a second position of the first data line, the second data signal undergoes a transition at a second time point, the first time point and the second time point The dots have a time difference; and the output time of the one scan signal is delayed according to the time difference.

To sum up, the display device according to the embodiment of the present invention adjusts the output of the scan signal according to the delay caused by the resistance-capacitance delay (RCdelay) of the data line, which can increase the effective charging time and further improve the display uniformity.

The detailed features and advantages of the present invention are described in detail below in the implementation manner, and its content is enough to make any person skilled in the art understand the technical content of the present invention and implement it accordingly, and according to the content disclosed in this description, the scope of protection of the claims and With the accompanying drawings, any person skilled in the art can easily understand the related objects and advantages of the present invention.

Description of drawings

FIG. 1 is a schematic diagram of an embodiment of the display device of the present invention.

FIG. 2 is a schematic diagram of waveforms of a data signal at a first position and at a second position.

Fig. 3 is a schematic diagram of waveforms of the second scanning signal before adjustment and after adjustment.

Among them, reference signs:

100 display units 102 pixel units

104 Gate Driver 106 Data Driver

110 Timing controller P1, P2 position

1021 Gate line 1023 Data line

T1, T2 time point G1～G18 scanning signal

Td time difference

detailed description

FIG. 1 is a schematic diagram of an embodiment of a display device of the present invention. The display device 100 includes a plurality of pixel units 102 , a plurality of gate lines 1021 , a plurality of data lines 1023 , a gate driver 104 , a data driver 106 and a timing controller 110 . A plurality of gate lines 1021 are electrically connected to the plurality of pixel units 1021, and the plurality of gate lines 1021 include a first gate line and a second gate line; wherein the first gate line, for example, may be The gate line closest to the data driver 106 among the plurality of gate lines 1021 ; the second gate line, for example, may be the gate line farthest from the data driver 106 among the plurality of gate lines 1021 . The plurality of data lines 1023 includes a first data line L1; the first data line L1 can be used to transmit a first data signal. The data line 1023, for example, can be electrically connected to the pixel unit 102 to transmit a data signal; it can also be a wire or bus used to transmit timing signals and control signals; it can also be a redundant data line , which is not connected to the plurality of pixel units. The gate line 1021 and the data line 1023 may intersect each other vertically or non-perpendicularly, or intersect at any angle, and the gate line 1021 and the data line 1023 may be a straight line or a serpentine line (serpentine line), which is not limited here . The gate driver 104 is used to output a plurality of scanning signals G1-G18, and the plurality of scanning signals G1-G18 include a first scanning signal, such as G1, to the first gate line and output a second scanning signal , eg G18, to the second gate line. The data driver 106 is electrically connected to the plurality of data lines 1023 .

FIG. 2 is a schematic diagram of waveforms of a data signal at a first position and at a second position. FIG. 3 is a schematic diagram of waveforms of scanning signals before and after adjustment. Referring to FIG. 1, FIG. 2 and FIG. 3 at the same time, the timing controller 110 is used to receive a first data signal at a first position P1 of the first data line L1, and the first data signal is at a first time T1 Point transition, the timing controller 110 is further used to receive a second data signal at a second position P2 of the first data line L1, the second data signal transitions at a second time T2 state, the first time point T1 and the second time point T2 have a time difference Td, wherein the gate driver 104 adjusts the time of the second scan signal G18 according to the time difference Td. In one embodiment, the gate driver 104 delays the time of outputting the second scan signal G18 according to the time difference Td. In one embodiment, the first position P1 corresponds to the first gate line G1 , and the second position P2 corresponds to the second gate line G18 . In one embodiment, the first position P1 is closer to an input end of the first data line L1 than the second position P2 . In one embodiment, the first position P1 is closer to the data driver 106 than the second position P2.

Referring to FIG. 2 , the first data signal starts to change from a first voltage level to a second voltage level at the first time point T1 . Wherein the second data signal starts to change from the first voltage level to the second voltage level at the second time point T2. Here, the first voltage level is greater than the second voltage level. However, in an embodiment, the first voltage level may also be lower than the second voltage level, and the present invention is not limited thereto.

The present invention also provides a driving method, which is suitable for a display device, including: receiving a first data signal at a first position P1 of a first data line L1, the first data signal at a first time point T1 Transition: receiving a second data signal at a second position P2 of the first data line L1, the second data signal transitions at a second time point T2, the first time point T1 and The second time point T2 has a time difference Td; and an output time of a scan signal is delayed according to the time difference Td.

According to an embodiment of the present invention, the first data signal is converted from a first voltage level to a second voltage level at the first time point T1.

To sum up, the display device according to the embodiment of the present invention can extend the charging time and improve the display quality by obtaining the time difference Td of the data signal due to the RCdelay and adjusting the scan signal according to the time difference Td.

Although the technical content of the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention, and any changes and modifications made by those skilled in the art without departing from the spirit of the present invention shall be covered by the present invention. Within the scope of the present invention, therefore, the scope of protection of the present invention should be defined by the scope of protection of the appended claims.

Claims (10)

1. A display device, characterized in that it comprises: multiple pixel units; A plurality of gate lines electrically connected to the pixel units, the gate lines include a first gate line and a second gate line; A plurality of data lines are used to transmit a first data, and the data lines include a first data line; a gate driver for outputting a first scan signal to the first gate line and outputting a second scan signal to the second gate line; a data driver electrically connected to the data lines; and A timing controller, used to receive the first data signal at a first position of the first data line, the first data signal undergoes transition at a first time point, and the timing controller is further used to receive the first data signal A second data signal at a second position of a data line, the second data signal transitions at a second time point, the first time point and the second time point have a time difference, wherein the gate driver The time for outputting the second scanning signal is adjusted according to the time difference. 2. The display device as claimed in claim 1, wherein the first data signal is converted from a first voltage level to a second voltage level at the first time point. 3. The display device according to claim 2, wherein the second data signal starts to change from the first voltage level to the second voltage level at the second time point. 4. The display device as claimed in claim 1, wherein the first position corresponds to the first gate line, and the second position corresponds to the second gate line. 5. The display device as claimed in claim 4, wherein the gate driver delays outputting the second scan signal according to the time difference. 6. The display device as claimed in claim 1, wherein the data lines comprise a redundant data line not connected to the pixel units. 7. The display device as claimed in claim 1, wherein the first position is closer to an input end of the first data line than the second position. 8. The display device as claimed in claim 7, wherein the first position is closer to the data driver than the second position. 9. A driving method, suitable for a display device, characterized in that it comprises: receiving a first data signal at a first position of a first data line, the first data signal transitions at a first time point; receiving a second data signal at a second position of the first data line, the second data signal transitions at a second time point, the first time point and the second time point have a time difference; and The output time of a scan signal is delayed according to the time difference. 10. The driving method as claimed in claim 9, wherein the first data signal is converted from a first voltage level to a second voltage level at the first time point.