CN1811892A - Liquid crystal display panel driving method and liquid crystal display device - Google Patents

Abstract

The invention discloses a liquid crystal display panel driving method suitable for a liquid crystal display panel, wherein the liquid crystal display panel comprises a plurality of first gate electrode wires and second gate electrode wires, a plurality of data wires and a plurality of display units which are respectively coupled with the corresponding first gate electrode wires and the second gate electrode wires and the data wires, and the liquid crystal display panel driving method comprises the following steps: sequentially providing conducting signals to the first gate electrode lines in a display picture in a first direction sequence, and sequentially providing the conducting signals to the second gate electrode lines in a second direction sequence opposite to the first direction sequence; when the conducting signal is provided to one of the first gate electrode lines and the second gate electrode lines, a data signal is provided to the data lines corresponding to the first gate electrode lines and the second gate electrode lines. The invention also discloses a liquid crystal display device with the liquid crystal display panel and at least one driver group.

Description

Liquid crystal display panel driving method and liquid crystal display device

technical field

The invention relates to a liquid crystal display panel, in particular to a driving method of the liquid crystal display panel and a liquid crystal display device.

Background technique

FIG. 1 is a schematic diagram of an equivalent circuit of an existing liquid crystal display panel (LCD panel for short) and its peripheral driving circuit. As shown in the figure, the LCD panel display area 10 is composed of criss-cross data lines (indicated by D1, D2, D3, ..., D2m) and gate electrode (gate) lines (indicated by G1, G2, ..., G2n means) intertwined, each set of interleaved data lines and gate electrode (gate) lines can be used to control a display unit (display unit), for example, data line D1 and gate electrode line G1 can be used to control display unit P11 . As shown in the figure, the equivalent circuit of each display unit mainly includes a thin film transistor TFT for controlling data entry, a storage capacitor Cst, and a liquid crystal capacitor Clc. The gate electrode and the drain electrode of the thin film transistor TFT are electrically connected to the gate electrode lines G1~G2n and the data lines D1~D2m respectively, and the conduction signal can be turned on or off in the same row (that is, the same gate electrode line) through the gate electrode lines G1~G2n ) to control whether the data signal (data signal) on the data lines D1-D2m can be written into the corresponding display unit.

The traditional liquid crystal display panel driving method achieves the effect of visual integration through spatial color mixing. Taking 60Hz as an example, that is, there are three sub-display units R, G, and B on the liquid crystal panel (not shown in the figure), and each display screen has a response time of about 16.7 milliseconds for the three sub-display units R, G, and B. Visually, you can receive the effect of R, G, and B three-color mixing. However, the traditional color sequential driving method (colorsequential driving method) achieves visual effects by color mixing in time. It utilizes the backlight of R, G, and B three colors, and only one color of backlight is turned on at a time. One-third of the display time, that is, about 5.6 milliseconds, for example, the backlight of R is turned on in the first 5.6 milliseconds, the backlight of G is turned on in the second 5.6 milliseconds, and the backlight of B is turned on in the third 5.6 milliseconds, then the visual The display screen can receive the result of color mixing from the three sub-display screens. According to the driving method of this color sequence method, a conduction signal is sequentially provided to scan from the first gate electrode line G1 to the last gate electrode line G2n, and the time to drive the three sub-screens of R, G, and B is about 5.6 milliseconds. After deducting the charging time of the pixel electrode and the turn-on time of the LED backlight, the allowable liquid crystal reaction time is only about 2 milliseconds. The LCD panel will cause the liquid crystal molecules to react due to the time difference between the first gate electrode line G1 and the last gate electrode line G2n being turned on. Time difference, because the time difference of liquid crystal molecule reaction makes the brightness of the top and bottom of the panel also vary. U.S. Patent No. 5,233,338 discloses a method of driving a liquid crystal display panel by a color sequence method, in which it is mentioned that when the (n+1)th display screen is displayed, the conduction signal scans the three sub-display screens of R, G, and B The directions need to be opposite to the scanning directions of the three sub-display frames R, G, and B when the signal is turned on at the nth frame. Wherein, the three sub-display frames of R, G and B of each display unit correspond to the same gate electrode line.

Contents of the invention

The object of the present invention is to provide a method for driving a liquid crystal display panel to solve the above-mentioned problem of uneven brightness between the top and bottom of the panel.

The method disclosed in the present invention is applicable to a liquid crystal display panel, and the liquid crystal display panel includes a plurality of first gate electrode lines and second gate electrode lines, a plurality of data lines, and a plurality of gate electrodes respectively coupled to the corresponding first gate electrodes. Line and one of the second gate electrode lines and the display unit of the data line, the liquid crystal display panel driving method of the present invention includes: in a display frame, sequentially provide a conduction signal in a sequence of a first direction to the first gate electrode line, and sequentially provide the conduction signal to the second gate electrode line in the order of the second direction opposite to the first direction; When one of the first gate electrode lines and each of the second gate electrode lines, respectively provide a data signal to each of the data corresponding to each of the first gate electrode lines and each of the second gate electrode lines Wire.

In addition, the present invention discloses a method for driving a liquid crystal display panel, which is suitable for a liquid crystal display panel, such as a Field-Sequential Color Liquid Crystal Display Panel (Field-Sequential Color Liquid Crystal Display Panel), and the liquid crystal display panel includes a plurality of first gates The electrode lines and the plurality of second gate electrode lines, the plurality of data lines and the plurality of display units respectively coupled to the corresponding one of the first gate electrode lines and the second gate electrode lines and the data lines. The liquid crystal display panel driving method includes: in an n-th frame, sequentially providing a conduction signal to the first gate electrode line in the order of a first direction, and sequentially providing a conduction signal to the first gate electrode line in a second direction opposite to the first direction The order of direction provides the conduction signal to the second gate electrode line in sequence, wherein n is a positive integer; in a (n+1)th frame, the order of the second direction is provided in sequence the conduction signal to the first gate electrode line, and sequentially provide the conduction signal to the second gate electrode line in the order of the first direction opposite to the second direction; When the conduction signal is sent to each of the first gate electrode lines and each of the second gate electrode lines, a data signal is respectively provided to each of the first gate electrode lines and each of the second gate electrode lines one for each of the data lines.

The present invention also discloses a liquid crystal display device, including: a liquid crystal display panel, which includes a plurality of first gate electrode lines and a plurality of second gate electrode lines, a plurality of first data lines and a plurality of second data lines, and a plurality of display units respectively coupled between the first gate electrode line and the first data line and between the second gate electrode line and the second data line; at least one driver group, which Used to sequentially provide a conduction signal to the first gate electrode line in a sequence of a first direction in a display frame, and sequentially provide a conduction signal in a sequence of a second direction opposite to the first direction signal to the second gate electrode line, and when the conduction signal is respectively provided to each of the first gate electrode lines and each of the second gate electrode lines, a data signal is provided to the Each first data line and each second data line of the first gate electrode line and each second gate electrode line.

Description of drawings

In order to make the above objects, features and advantages of the present invention more comprehensible, an embodiment will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a schematic structure diagram of an array of a traditional liquid crystal display panel;

2 is a schematic structural diagram of an array of a liquid crystal display panel according to an embodiment of the present invention;

3 is a timing diagram of a scanning direction of a liquid crystal display panel according to an embodiment of the present invention;

FIG. 4 is a timing diagram of another scanning direction of a liquid crystal display panel according to an embodiment of the present invention;

5 is a schematic structural diagram of an array of a liquid crystal display panel according to another embodiment of the present invention;

FIG. 6 is a schematic structure diagram of an array of a liquid crystal display panel according to another embodiment of the present invention;

FIG. 7 is a schematic structure diagram of an array of a liquid crystal display panel according to yet another embodiment of the present invention;

8 is a schematic structural diagram of an array of a liquid crystal display panel according to another embodiment of the present invention;

FIG. 9 is a schematic structural diagram of an array of a liquid crystal display panel according to another embodiment of the present invention;

FIG. 10 is a schematic structural diagram of an array of a liquid crystal display panel according to yet another embodiment of the present invention;

11 is a schematic structural diagram of an array of a liquid crystal display panel according to another embodiment of the present invention;

FIG. 12 is a schematic structure diagram of an array of a liquid crystal display panel according to another embodiment of the present invention.

Explanation of reference signs

10, 20, 50, 60, 70, 80, 90, 104, 110, 120 LCD panel display area

111, 121 Drivers

101, 201, 501, 60 Data Drives

100, 200, 500, 700, 900 Gate Drivers

701, 801, 901, 103 First data driver

702, 803, 903, 106 Second data drive

600, 800, 102 First Gate Driver

602, 802, 105 Second Gate Driver

P11 Display Unit

D1, D2, D3, D4, D2m-1, D2m Data cable

G1, G2, G3, G4, Gn, Gn+1, Gn+2, G2n-1, G2n Gate electrode lines

Detailed ways

2 is a schematic diagram of an equivalent circuit of a liquid crystal display panel (hereinafter referred to as an LCD panel) and its peripheral driving circuit of the present invention. As shown in the figure, the display area 20 of the LCD panel is composed of criss-cross data lines (indicated by D1, D2, D3, ..., D2m) and gate electrode lines (indicated by G1, G2, ..., G2n) Interleaved, each group of interleaved data lines and gate electrode lines can be used to control a display unit (display unit), for example, the data line D1 and the gate electrode line G1 can be used to control the display unit P11. In a display screen, a gate electrode driver 200 sends a conduction signal to the corresponding gate electrode lines, wherein the odd-numbered gate electrode lines G1, G3, G5, . . . , G2n-1 are from top to bottom (th One direction, the downward direction of the arrow as shown in Figure 3) scanning, the even-numbered gate electrode lines G2, G4, ..., G2n from bottom to top (the second direction, the upward direction of the arrow as shown in Figure 3 direction) scanning, since the same data line is shared, there needs to be a time difference between the conduction signal sent by the gate electrode driver 200 to G1 and G2n, and the time for the conduction signal sent by the gate electrode driver 200 to G1 can be earlier or later than The time difference between the time when the conduction signal is sent from the gate driver 200 and G2n can range from 1 to 20 microseconds, and preferably 5 to 10 microseconds. As shown in FIG. 3 , in each display frame, a conduction signal is provided to the odd-numbered gate electrode lines G1, G3, G5, . . . The second direction from bottom to top provides a conduction signal to the even-numbered gate electrode lines G2 , G4 , . . . , G2n. It can also be shown in FIG. 4 that when the nth display screen is displayed, a conduction signal is provided to the odd-numbered gate electrode lines G1, G3, G5, ..., G2n-1 in the first direction from top to bottom. , and provide a conduction signal to the even-numbered gate electrode lines G2, G4, ..., G2n in the second direction from bottom to top, and in the (n+1)th display screen, from bottom to top The second direction above provides a conduction signal to the odd-numbered gate electrode lines G1, G3, G5, ..., G2n-1, and provides a conduction signal to the even-numbered lines in the first direction from top to bottom Gate electrode lines G2, G4, . . . , G2n. The difference between the present invention and the traditional technique of sequentially scanning from the first gate electrode line to the last gate electrode line is that the odd-numbered gate electrode lines G1, G3, G5, ..., G2n-1 and the even-numbered gate electrode lines The gate electrode lines G2, G4, . . . , G2n are scanned in opposite directions. Therefore, in the (n+1)th display screen, the conduction signal scans the odd-numbered gate electrode lines G1, G3, G5, ..., G2n-1 of the three sub-display screens R, G, or B in the same direction as In the nth frame, the conduction signal scans the odd-numbered gate electrode lines G1, G3, G5, . In the (n+1)th display screen, the conduction signal scans the even-numbered gate electrode lines G2, G4, ..., G2n of the three sub-display screens R, G, or B in the same direction as in the nth screen The scanning directions of the conduction signal on the even-numbered gate electrode lines G2 , G4 , .

Fig. 5 is a schematic structure diagram of an array of a liquid crystal display panel according to another embodiment of the present invention. The even-numbered gate electrode lines G2, G4, ..., G2n do not share data lines (indicated by D1, D2, D3, ..., D2m), and the odd-numbered gate electrode lines G1, G3, G5, ... , G2n-1 and the odd-numbered data lines D1, D3, D5, ..., D2m-1 are coupled to a corresponding display unit, and the even-numbered gate electrode lines G2, G4, ..., G2n are connected to the even-numbered The data lines D2, D4, . . . , D2m are coupled to a corresponding display unit. In this embodiment, a turn-on signal is provided to the start of the odd-numbered gate electrode lines G1, G3, G5, . . . , G2n-1 and even-numbered gate electrode lines G2, G4, . The times may be the same or have a time difference, and the time difference may range from 1 to 20 microseconds, among which 5 to 10 microseconds is preferred.

FIG. 6 is a schematic structure diagram of an array of a liquid crystal display panel in another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 5 is that the first gate electrode driver 600 provides a conduction signal to the odd-numbered gates. The electrode lines G1 , G3 , G5 , .

FIG. 7 is a schematic structure diagram of an array of a liquid crystal display panel in yet another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 5 is that the first data driver 701 provides a data signal to the odd-numbered data lines D1 , D3, D5, . . . , D2m-1, and the second data driver 702 provides a data signal to the even-numbered data lines D2, D4, . , . . . , D2m-1 and the even-numbered data lines D2, D4, .

FIG. 8 is a schematic structure diagram of an array of liquid crystal display panels according to another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 7 is that the first gate electrode driver 800 provides a conduction signal to the odd-numbered gates. The electrode lines G1 , G3 , G5 , .

FIG. 9 is a schematic structure diagram of an array of a liquid crystal display panel in another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 7 is that the odd-numbered data lines D1, D3, D5, ..., D2m -1 and the even-numbered data lines D2, D4, ..., D2m are not parallel to each other and arranged alternately, but are divided into the upper half and the lower half, that is, D1 and D2 are set on the same straight line, but the two data lines Lines do not intersect, with a break in the middle.

FIG. 10 is a schematic structure diagram of an array of a liquid crystal display panel in yet another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 9 is that the first gate driver 102 provides a conduction signal to the odd-numbered gates. The electrode lines G1 , G3 , G5 , .

FIG. 11 is a schematic structural diagram of an array of a liquid crystal display panel according to another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 2 is that the driver 111 integrates the gate electrode driver 200 and the data driver shown in FIG. 2 201 functions.

FIG. 12 is a schematic structure diagram of an array of a liquid crystal display panel in another embodiment of the present invention. The difference between this embodiment and the embodiment shown in FIG. 5 is that the driver 121 integrates the gate electrode driver 500 and the data driver shown in FIG. 5 501 function.

Although the present invention has been described above through multiple embodiments, this is not a limitation of the present invention. Any skilled person in the art can also make any changes and modifications without departing from the concept and scope of the present invention. Therefore, this The scope of protection of the invention should be defined by the appended claims.

Claims (12)

1. driving method for liquid crystal display panel that is applicable to display panels, this display panels comprises many first gate electrode lines and the second gate electrode line, many data lines and a plurality of display unit that is respectively coupled to one of the corresponding described first gate electrode line and described second gate electrode line and described data line, and described driving method for liquid crystal display panel comprises:

Order with a first direction in a display frame provides a Continuity signal to the described first gate electrode line in regular turn, provides this Continuity signal to the described second gate electrode line in regular turn with the second direction order in contrast to described first direction; And

When described Continuity signal is provided respectively to one of each described first gate electrode line and each described second gate electrode line, provide a data-signal each described data line respectively to one of corresponding each described first gate electrode line and each described second gate electrode line.

2. driving method for liquid crystal display panel as claimed in claim 1, wherein, described Continuity signal begins to be provided in regular turn the described first gate electrode line in one first zero-time.

3. driving method for liquid crystal display panel as claimed in claim 2, wherein, described Continuity signal begins to be provided in regular turn the described second gate electrode line in described first zero-time.

4. driving method for liquid crystal display panel as claimed in claim 2, wherein, described Continuity signal begins to be provided in regular turn the described second gate electrode line in one second zero-time.

5. driving method for liquid crystal display panel as claimed in claim 4, wherein, described first zero-time is not equal to described second zero-time.

6. driving method for liquid crystal display panel as claimed in claim 4, wherein, the disparity range of described first zero-time and described second zero-time is about between 1～20 microsecond.

7. driving method for liquid crystal display panel as claimed in claim 4, wherein, the disparity range of described first zero-time and described second zero-time is about between 5～10 microseconds.

8. liquid crystal indicator comprises:

One display panels, it comprises many first gate electrode lines and many second gate electrode lines, many first data lines and many second data lines and a plurality ofly is respectively coupled between described first gate electrode line and described first data line and the display unit between described second gate electrode line and described second data line; And

At least one driver bank, it is used in a display frame order with a first direction provides a Continuity signal to provide described Continuity signal to the described second gate electrode line and when described Continuity signal is provided respectively to the described second gate electrode line of each described first gate electrode line and each in regular turn to the described first gate electrode line and with the second direction order in contrast to this first direction in regular turn, provides a data-signal to each described first data line and each described second data line corresponding to each described first gate electrode line and each described second gate electrode line respectively.

9. liquid crystal indicator as claimed in claim 8, wherein, described at least one driver bank comprises:

At least one gate electrode driver, its order with described first direction provide described Continuity signal to the described first gate electrode line in regular turn, and provide described Continuity signal to the described second gate electrode line in regular turn with described second direction order; And

At least one data driver, it provides described data-signal to each described first data line and each described second data line corresponding to each described first gate electrode line and each described second gate electrode line respectively when described Continuity signal is provided to described first gate electrode line and the described second gate electrode line.

10. liquid crystal indicator as claimed in claim 9, wherein, described at least one gate electrode driver comprises one first gate electrode driver and one second gate electrode driver, the described first gate electrode driver provides described Continuity signal to the described first gate electrode line according to the order of described first direction, and the described second gate electrode driver provides described Continuity signal to the described second gate electrode line according to the order of described second direction.

11. liquid crystal indicator as claimed in claim 9, wherein, described at least one data driver comprises one first data driver and one second data driver, and described first data driver provides described data-signal to each described first data line, and described second data driver provides described data-signal to each described second data line.

12. liquid crystal indicator as claimed in claim 8, wherein, described display panels is a field sequence type color liquid crystal panel.

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