WO2014173150A1

WO2014173150A1 - Array substrate, display apparatus, and driving method

Info

Publication number: WO2014173150A1
Application number: PCT/CN2013/089891
Authority: WO
Inventors: 姜清华; 李小和; 刘永; 邵贤杰; 李红敏
Original assignee: 合肥京东方光电科技有限公司; 京东方科技集团股份有限公司
Priority date: 2013-04-27
Filing date: 2013-12-18
Publication date: 2014-10-30
Also published as: CN103268048A; CN103268048B

Abstract

Provided are an array substrate, a display apparatus, and a driving method. The array substrate comprises: multiple scan signal lines (1), comprising an Nth scan signal line and an (N+1)th scan signal line; multiple data signal lines (2), comprising an Mth data signal line; a pixel unit (3), comprising a first subpixel and a second subpixel; a first switch unit (4), a control terminal (41) of the first switch unit (4) being electrically connected to the Nth scan signal line, an input terminal (42) of the first switch unit (4) being electrically connected to the Mth data signal line, and an output terminal (43) of the first switch unit (4) being electrically connected to a first pixel electrode; a second switch unit (5), a control terminal (51) of the second switch unit (5) being electrically connected to the Nth scan signal line, an input terminal (52) of the second switch unit (5) being electrically connected to the Mth data signal line, and an output terminal (53) of the second switch unit (5) being electrically connected to a second pixel electrode; and a third switch unit (6), a control terminal (61) of the third switch unit (6) being electrically connected to the (N+1)th scan signal line, an input terminal (62) of the third switch unit (6) providing an input signal, and an output terminal (63) of the third switch unit (6) being electrically connected to the second pixel electrode. By means of a difference between electrical fields of the first subpixel and the second subpixel, a deflection angle of liquid crystal of the second subpixel is greater than a deflection angle of liquid crystal of the first subpixel, so as to achieve a wide view angle, and through mutual compensation between display characteristics of two subpixels, a color shift phenomenon caused by a single pixel is mitigated.

Description

Array substrate, display device and driving method

The present invention relates to the field of display technologies, and in particular, to an array substrate, a display device, and a driving method. Background technique

The liquid crystal display device controls the light transmittance through the liquid crystal using an electric field to display an image. The liquid crystal display device is roughly classified into a vertical electric field drive type and a horizontal electric field drive type in accordance with the direction of the electric field driving the liquid crystal. The vertical electric field drive type liquid crystal display device is provided with a common electrode and a pixel electrode opposite to each other on the upper and lower substrates, and a vertical electric field is formed between the common electrode and the pixel electrode to drive the liquid crystal. The horizontal electric field drive type liquid crystal display device has a common electrode and a pixel electrode disposed on the lower substrate, and a horizontal electric field is formed between the common electrode and the pixel electrode to drive the liquid crystal.

Although the horizontal electric field type liquid crystal display device has a larger viewing angle advantage than the vertical electric field type liquid crystal display device, the horizontal electric field type liquid crystal display device cannot satisfy the requirements of a wide viewing angle as the size of the liquid crystal display device becomes larger and larger. It is a 40-inch widescreen LCD display device. Summary of the invention

Embodiments of the present invention provide an array substrate, a display device, and a driving method, and a display device including the array substrate can realize a wider viewing angle.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

The invention provides an array substrate, comprising:

a plurality of scanning signal lines, including an Nth scanning signal line and an N+1th scanning signal line, wherein N is a positive integer;

a plurality of data signal lines, including the Mth data signal line, wherein M is a positive integer; the pixel unit includes a first sub-pixel and a second sub-pixel, wherein the first sub-pixel includes a first pixel electrode, and the second sub-pixel Including a second pixel electrode;

a first switching unit, comprising: a control end, an input end, and an output end, wherein the control end is electrically connected to the Nth scan signal line; the input end is electrically connected to the Mth data signal line; The end is electrically connected to the first pixel electrode;

a second switching unit, comprising: a control end, an input end, and an output end, wherein the control end is electrically connected to the Nth scanning signal line; the input end is electrically connected to the Mth data signal line; the output end is The second pixel electrode is electrically connected;

a third switching unit, comprising: a control end, an input end, and an output end, wherein the control end is electrically connected to the (N+1)th scan signal line; the input end is configured to provide an input signal; and the output end is opposite to the second pixel electrode Electrical connection.

Optionally, the Nth scan signal line and the N+1th scan signal line are located between the first subpixel and the second subpixel.

Optionally, the first switch unit, the second switch unit, and the third switch unit are thin film transistors, including: a gate, a source, and a drain, wherein the gate serves as a control end, and the source serves as an input end. , the drain serves as the output.

Optionally, an input end of the third switch unit is electrically connected to an output end of the first switch unit.

Optionally, an area of the first pixel electrode is larger than an area of the second pixel electrode.

Optionally, an input end of the third switch unit is electrically connected to the Mth data signal line. Optionally, an area of the first pixel electrode is smaller than an area of the second pixel electrode.

The present invention provides a display device comprising the array substrate of any of the present invention. The present invention provides a driving method for driving a display device including the array substrate provided by the embodiment of the present invention. The driving method includes:

In one scan period, a scan signal having a scan time T is supplied to the Nth scan signal line between the time T1 and the time T3, and the scan time is supplied to the (N+1)th scan signal line between the time T2 and the time T3. The scan signal of T' is turned on, and the corresponding pixel subunit is turned on by the scan signal of the scan signal line and the data line signal on the data signal line.

Optionally, the scan time T is greater than the scan time T'.

Optionally, the scan time T' is 1/2-2/3 of the scan time T.

The present invention provides a driving method for driving a display device including the array substrate provided by the embodiment of the present invention. The driving method includes:

In one scan period, a scan signal having a scan time T is supplied to the Nth scan signal line between the time T1 and the time T2, and the N+1th scan signal is transmitted between the time T2 and the time T3. The line provides a scan signal with a scan time of T', and the corresponding pixel subunit is opened by the scan signal of the scan signal line and the data line signal of the data signal line, wherein the data line voltage between the time T1 and the time T2 is less than Data line voltage between time T2 and time T3.

Optionally, the scan time T is less than or equal to the scan time T'.

Optionally, the scan time T is 1/2-2/3 of the scan time T'.

An embodiment of the present invention provides an array substrate and a display device. The pixel unit of the array substrate includes a first sub-pixel and a second sub-pixel, and the field strength of the first sub-pixel or the second sub-pixel is increased. Thereby, the deflection angle of the liquid crystal is increased, and the display device including the array substrate can realize a wider viewing angle. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, rather than to the present invention. limit.

1 is a schematic partial structural diagram of an array substrate according to an embodiment of the present invention;

2 is a schematic partial structural view of another array substrate according to an embodiment of the present invention; FIG. 3 is a partial schematic structural view of another array substrate according to an embodiment of the present invention; FIG. 5 is a block diagram of driving voltages on another gate line and data line according to an embodiment of the present invention. FIG. 1-gate line; 2-data line; 3-pixel unit; 31-first pixel electrode; 32-second pixel electrode; 4-first thin film transistor; 41-first gate; 42-first source; 43-first drain; 5-second thin film transistor; 51-second gate; 52-second source; 53-second drain; 6-third thin film transistor; 61-third gate; - third source; 63 - third drain. The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention. Unless otherwise defined, technical terms or scientific terms used herein shall be of ordinary meaning as understood by those of ordinary skill in the art to which the invention pertains. The words "a", "an" or "the" and the like do not denote a quantity limitation, but mean that there is at least one. The words "including" or "comprising", etc., are intended to mean that the elements or objects that are "included" or "comprising" are intended to be in the Component or object. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Upper", "lower", "left", "right", etc. are only used to indicate the relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may also change accordingly.

The present invention provides an array substrate, as shown in FIG. 1, FIG. 2, and FIG. 3, comprising: a plurality of scanning signal lines 1 including an Nth scanning signal line and an N+1th scanning signal line, wherein N is Positive integer

a plurality of data signal lines 2, including an Mth data signal line, wherein M is a positive integer; the pixel unit ₃ includes a first sub-pixel and a second sub-pixel, wherein the first sub-pixel includes a first pixel electrode 31, The two sub-pixels include a second pixel electrode 32;

a first switching unit, comprising: a control end, an input end, and an output end, wherein the control end is electrically connected to the Nth scanning signal line; the input end is electrically connected to the Mth data signal line; the output end is The first pixel electrode is electrically connected;

It should be noted that the input end of the third switching unit is used to provide an input signal, that is, to provide an opening voltage of the third switching unit. It can be directly connected to a voltage source, or it can be turned on by other wires. For example, it may be connected to the output end of the first switching unit when the first switching unit is turned on, and the opening voltage of the third switching unit is provided by electrically connecting with the output end of the first switching unit; The M data signal lines are electrically connected, and the opening voltage of the third switching unit is provided by electrically connecting the Mth data signal lines. The embodiment of the present invention is only shown in FIG. 1 and FIG. 2 The description will be given as an example.

An embodiment of the present invention provides an array substrate, wherein a pixel unit of the array substrate includes a first sub-pixel and a second sub-pixel, and the liquid crystal is deflected by making the electric fields of the first sub-pixel and the second sub-pixel different. The angle is different, so that the deflection angle of the liquid crystal of the second sub-pixel is larger than the liquid crystal deflection angle of the first sub-pixel, that is, a wider viewing angle is realized. And by mutually compensating the display characteristics of the two sub-pixels, the color shift phenomenon from a single pixel can also be improved.

Optionally, the first switch unit, the second switch unit, and the third switch unit are thin film transistors, including: a gate, a source, and a drain, wherein the gate serves as a control end, and the source serves as an input end. , the drain serves as the output. For example, as shown in FIG. 1 and FIG. 2, the first switching unit is a first thin film transistor 4, and includes a first gate 41 as a control end of the first switching unit, and is electrically connected to the Nth scanning signal line; The source 42 is electrically connected to the Mth data signal line as an input end of the first switching unit, and the first drain 43 is electrically connected to the first pixel electrode as an output end of the first switching unit. The second switching unit is a second thin film transistor 5, and includes a second gate 51 as a control end of the second switching unit, electrically connected to the Nth scanning signal line; and a second source 52 as an input of the second switching unit The terminal is electrically connected to the Mth data signal line; the second drain 53 is electrically connected to the second pixel electrode as an output end of the second switching unit. The third switching unit is a third thin film transistor 6 including a third gate 61 as a control terminal of the third switching unit, electrically connected to the (N+1)th scanning signal line; and a third source 62 as a third switching unit The input terminal provides an input signal of the third thin film transistor, which is electrically connected to the drain 43 of the first thin film transistor 4 in FIG. 1, and is electrically connected to the Mth data signal line in FIG. 2, and the third drain 63 is used as An output end of the third switching unit is electrically connected to the second pixel electrode. Of course, the switching unit may be another transistor or the like. The embodiment of the present invention is described by taking the switching unit as a thin film transistor as an example.

Optionally, an input end of the third switch unit is electrically connected to an output end of the first switch unit. For example, as shown in FIG. 1, the source 62 of the third thin film transistor 6 is electrically connected to the drain 43 of the first thin film transistor 4, and the third thin film transistor 6 is provided through the drain of the first thin film transistor 4. Turn on the voltage.

Optionally, as shown in FIG. 1 , an area of the first pixel electrode is larger than an area of the second pixel electrode. The electric field formed by the two sub-pixels may be different by dividing the pixel unit into two sub-pixels. For example, the electric field of the second sub-pixel may be greater than the electric field of the first sub-pixel, and the tilt angle of the second sub-pixel liquid crystal is greater than the first The tilt angle of the sub-pixel liquid crystal, that is, a wider viewing angle is achieved. And The color shift caused by the single pixel can also be improved by mutual compensation of the display characteristics of the two sub-pixels, and the input end of the third switch unit is electrically connected to the Mth data signal line. For example, as shown in FIG. 2, the source 62 of the third thin film transistor 6 is electrically connected to the Mth data signal line, and the turn-on voltage of the third thin film transistor 6 is directly provided through the Mth data signal line. .

Optionally, as shown in FIG. 3, the area of the first pixel electrode 31 is smaller than the area of the second pixel electrode 32.

Optionally, as shown in FIG. 1 , FIG. 2 and FIG. 3 , the Nth scan signal line and the N+1th scan signal line are located between the first sub-pixel and the second sub-pixel. And further, the first sub-pixel and the second sub-pixel are located on the same side of the Mth data line.

The embodiment of the present invention provides a display device, including any of the array substrates provided by the embodiments of the present invention. The display device may be a display device such as a liquid crystal display or an electronic paper, and any product or component having a display function such as a television, a digital camera, a mobile phone, a tablet computer or the like including the display device.

It should be noted that the liquid crystal display device controls the light transmittance through the liquid crystal by an electric field to display an image. According to the electric field direction of the driving liquid crystal, the liquid crystal display device is roughly classified into a vertical electric field driving type and a horizontal electric field driving type. The vertical electric field-driven liquid crystal display device is provided with a common electrode and a pixel electrode opposite to each other on the upper and lower substrates, and a vertical electric field is formed between the common electrode and the pixel electrode to drive the liquid crystal, such as a TN (Twist Nematic) type, VA (Vertical Alignment) type liquid crystal display device. The horizontal electric field-driven liquid crystal display device has a common electrode and a pixel electrode disposed on the lower substrate, and a horizontal electric field is formed between the common electrode and the pixel electrode to drive the liquid crystal, such as ADS (Advanced-Super Dimensional Switching). Type, IPS (In Plane Switch) type liquid crystal display device. The display device provided by the present invention may be any of the above liquid crystal display devices.

Embodiments of the present invention provide a driving method applicable to a display device including the array substrate shown in FIG. 1 or FIG. 2 or FIG. For example, the method includes providing a scan signal with a scan time T to the Nth scan signal line between the time T1 and the time T3 in one scan period, and the N+1th between the time T2 and the time T3 The scan signal line provides a scan signal with a scan time of T', and the scan signal of the scan signal line and the data line signal of the data signal line open correspondingly Pixel subunit.

Embodiments of the present invention provide a block diagram of a gate line and a data line driving voltage corresponding to the above driving method, as shown in FIG. When the driving method is used to drive a display device including the array substrate shown in FIG. 1, at time T1, the display device provides a scanning signal to the Nth scanning signal line through circuit control, and the voltage on the data line is VI. The first thin film transistor and the second thin film transistor are simultaneously turned on by the data line signal on the Mth data line, and the voltages of the first pixel electrode and the second pixel electrode are both VI, the first sub-pixel and the second sub-pixel The field strength of the pixel is El. At time T2, the display device supplies a scan signal to the (N+1)th scan signal line through circuit control. At this time, since the source of the third thin film transistor is electrically connected to the drain of the first thin film transistor, the third thin film transistor is turned on. The field strength formed by the third thin film transistor in the second sub-pixel is E2, and the field strength on the second sub-pixel is a superposition of two field strengths, that is, formed by the second thin film transistor and through the third thin film transistor. The superposition of the field strengths, at this time the field strength on the second sub-pixel is El + E2. Therefore, the deflection angle of the liquid crystal of the second sub-pixel is larger than the deflection angle of the liquid crystal of the first sub-pixel. The power supply voltage on the data line in the embodiment of the present invention is the same as the power supply voltage in the prior art, that is, the viewing angle of the liquid crystal display device is increased without increasing the driving voltage of the entire pixel. The pixel unit of the embodiment of the present invention includes a first sub-pixel and a second sub-pixel. By making the voltages of the first sub-pixel and the second sub-pixel different, the gray scale of the display is different, and the two sub-pixels display the characteristics of each other. Compensation can improve the color shift caused by a single pixel.

Referring again to FIG. 4, when the driving method is used to drive a display device including the array substrate shown in FIG. 2, at time T1, the display device provides a scanning signal to the Nth scanning signal line through circuit control, at this time, the data line voltage For the VI, the first thin film transistor and the second thin film transistor are simultaneously turned on by the data line signal on the Mth data line, and the voltages of the first pixel electrode and the second pixel electrode are both VI, the first sub-pixel and The field strength of the second sub-pixel is El. At time T2, the display device supplies a scan signal to the (N+1)th scan signal line through circuit control. At this time, since the source of the third thin film transistor is electrically connected to the Mth data line, the first data line is provided through the Mth data line. The turn-on voltage of the three thin film transistors turns on the third thin film transistor, and the field strength formed by the third thin film transistor in the second sub-pixel is E2, and the field strength on the second sub-pixel is a superposition of two field strengths, that is, The field strength on the second sub-pixel is El+E2 at this time by the superposition of the field strength formed by the second thin film transistor and the third thin film transistor. Therefore, the deflection angle of the liquid crystal of the second sub-pixel at the time T2-T3 is greater than the deflection angle of the liquid crystal of the first sub-pixel. The power supply voltage on the data line in the embodiment of the present invention The supply voltage in the prior art is the same, that is, the viewing angle of the liquid crystal display device is increased without increasing the driving voltage of the entire pixel. The pixel unit of the embodiment of the present invention includes a first sub-pixel and a second sub-pixel. By making the voltages of the first sub-pixel and the second sub-pixel different, the gray scale of the display is different, and the two sub-pixels display the characteristics of each other. Compensation can improve the color shift caused by a single pixel.

Optionally, the scan time T is greater than the scan time T'. Since the area of the first sub-pixel is larger than the area of the second sub-pixel, and the scan time T is 1/2-2/3 of the scan time T, the display time of the first sub-pixel is greater than the display time of the second sub-pixel. Helps improve the display. For example, the scan time T' between the time T2 and the time T3 is 1/2-2/3 of the scan time T between the time T1 and the time T3.

It should be noted that the above driving method provided by the embodiment of the present invention can also be applied to a display device including the array substrate shown in FIG. 3, and a driving principle of the display device including the array substrate shown in FIG. 2. the same.

Optionally, the embodiment of the present invention provides another driving method, which is applicable to driving a display device including the array substrate shown in FIG. 3. The driving method includes: providing a scan signal with a scan time T to the Nth scan signal line between the T1 time and the T2 time in one scan period, and scanning the N+1th scan between the T2 time and the T3 time The signal line provides a scan signal with a scan time of T', and the corresponding pixel subunit is opened by the scan signal of the scan signal line and the data line signal of the data signal line, wherein the data line voltage between the time T1 and the time T2 Less than the data line voltage between time T2 and time T3.

The embodiment of the present invention further provides a block diagram of the gate line and the data line driving voltage corresponding to the above driving method. As shown in FIG. 5, at time T1, the display device provides scanning to the Nth scanning signal line through circuit control. a signal, the first thin film transistor and the second thin film transistor are simultaneously turned on, at this time, the data line voltage is VI, and the first pixel electrode and the second pixel electrode are charged by the data line signal on the Mth data line, at this time, the first The voltages of the pixel electrode and the second pixel electrode are both VI, and the field strengths of the first sub-pixel and the second sub-pixel are El. At time T2, the display device supplies a scan signal to the (N+1)th scan signal line through circuit control, and turns on the third thin film transistor. At this time, the data line voltage on the Mth data line is V2, and V2 is greater than VI, The data line signal on the Mth data line is recharged for the second pixel electrode, at which time the first thin film transistor and the second thin film transistor are turned off, and the electric field formed by the third thin film transistor in the second subpixel is E2, and E2 is greater than El. In In the pixel unit, at the time T2-T3, the deflection angle of the liquid crystal of the second sub-pixel is larger than the liquid crystal deflection angle at the time T1-T2, thereby increasing the viewing angle of the liquid crystal display device. It should be noted that when the scanning signal is not supplied to the Nth scanning signal line at the time T2, since the storage unit has a storage capacitor, the image displayed by the first sub-pixel does not disappear immediately, but continues for a certain period of time. The pixel unit of the embodiment of the present invention includes a first sub-pixel and a second sub-pixel. By making the voltages of the first sub-pixel and the second sub-pixel different, the gray scale of the display is different, and the two sub-pixels display the characteristics of each other. Compensation can also improve the color shift caused by a single pixel.

Optionally, the scan time T between the time T1 and the time T2 is less than or equal to the scan time T' between the time T2 and the time T3. Since the area of the second sub-pixel is larger than the area of the first sub-pixel, the scan time T is smaller than the scan time T′, and the display time of the second sub-pixel is greater than the display time of the first sub-pixel, which is advantageous for improving the display effect. Further, for example, the scan time T may be 1/2-2/3 of the scan time T'.

The above is only an exemplary embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical scope of the present invention. All should be covered by the scope of the present invention. The scope of protection of the invention is determined by the appended claims.

Claims

Claim

An array substrate comprising:

The array substrate according to claim 1, wherein the Nth scanning signal line and the (N+1)th scanning signal line are located between the first sub-pixel and the second sub-pixel.

The array substrate according to claim 1 or 2, wherein the first switching unit, the second switching unit, and the third switching unit are thin film transistors, including: a gate, a source, and a drain, wherein The gate is used as the control terminal, the source is used as the input terminal, and the drain is used as the output terminal.

The array substrate according to any one of claims 1 to 3, wherein an input end of the third switching unit is electrically connected to an output end of the first switching unit.

The array substrate according to claim 4, wherein an area of the first pixel electrode is larger than an area of the second pixel electrode.

The array substrate according to any one of claims 1 to 3, wherein an input end of the third switching unit is electrically connected to the Mth data signal line.

The array substrate according to claim 6, wherein an area of the first pixel electrode is smaller than an area of the second pixel electrode.

A display device, comprising the array substrate according to any one of claims 1-7.

A driving method, wherein the driving method is for driving a display device comprising the array substrate according to any one of claims 1 to 5, the driving method comprising:

10. The driving method according to claim 9, wherein the scanning time T is greater than the scanning time r.

The driving method according to claim 10, wherein the scanning time τ' is a scanning time

1/2-2/3 of T.

A driving method, wherein the driving method is for driving a display device comprising the array substrate according to any one of claims 1 to 3, and the method of claim 6 or 7, wherein the driving method comprises:

In one scan period, a scan signal having a scan time T is supplied to the Nth scan signal line between the time T1 and the time T2, and the scan time is supplied to the (N+1)th scan signal line between the time T2 and the time T3. a scan signal of T', and a corresponding pixel sub-unit is turned on by the scan signal of the scan signal line and the data line signal on the data signal line, wherein the data line voltage between the time T1 and the time T2 is less than the T2 time and the T3 The data line voltage between times.

The driving method according to claim 12, wherein the scanning time T is less than or equal to the scanning time T'.

The driving method according to claim 13, wherein the scanning time T is a scanning time T'