CN201204029Y

CN201204029Y - Liquid crystal display apparatus

Info

Publication number: CN201204029Y
Application number: CNU2008200597101U
Authority: CN
Inventors: 朱修剑; 王志军
Original assignee: SVA Group Co Ltd
Current assignee: SVA Group Co Ltd
Priority date: 2008-06-13
Filing date: 2008-06-13
Publication date: 2009-03-04
Anticipated expiration: 2018-06-13

Abstract

The utility model discloses a LCD device and driving method thereof. The LCD device comprises a liquid crystal panel, a time sequence controller, a gate driver, a first source driver and a second source driver, wherein the liquid crystal panel comprises pixels distributed in an array of m rows and n columns, each row of pixels is connected by one gate line, each column of pixel is connected by two data lines according to whether it is odd line or even line, the first and the second source driver drives data lines on odd line and even line respectively. The provides LCD device and driving method increase charging time of each line in conventional LCD device architecture by times in one frame, so as to achieve the object of enhancing pixel charging time.

Description

Liquid crystal indicator

Technical field

The utility model relates to a kind of liquid crystal indicator and driving method thereof, relates in particular to a kind of thin-film transistor LCD device.

Background technology

Liquid crystal indicator (LCD) is to utilize the variation that is clipped in electric field intensity on the liquid crystal molecule, and the power that changes the orientation control printing opacity of liquid crystal molecule is come display image.At present, liquid crystal indicator since its have in light weight, volume is little, thin thickness, be used in widely in the various big-and-middle undersized terminal presentation facilities.In general, liquid crystal indicator comprises LCD panel with picture element matrix and the driving circuit that is used to drive this LCD panel.

As shown in Figure 1, liquid crystal indicator comprises: display panels 11, and it has picture element matrix; Gate drivers 12 is used for the gate lines G L of display panels 11 is driven gating; Source electrode driver 14 is used for the data line DL of display panels 11 is driven; Wherein, gate drivers 12 and source electrode driver 14 are by time schedule controller 13 controls.At display panels 11, there is liquid crystal in each zone that between gate lines G L and data line DL, intersects, liquid crystal cells Clc becomes matrix distribution in display panels 11; In the zone of this intersection, there is a thin film transistor (TFT) TFT, as the residing gate lines G L of TFT during by gating, the data-signal of data line DL charges into liquid crystal cells Clc, and keeps this data-signal by Cs; The other end of Cs electric capacity is communicated with by a CS electrode wires parallel with gate lines G L; Liquid crystal cells Clc changes the state of liquid crystal according to signal, shows to realize GTG thereby control transmittance.

When the LCD display image, because the characteristic of some low-response speed of liquid crystal itself and the continuous GTG display property that keeps, the afterimage of previous frame is easy to generate the dynamic fuzzy phenomenon of motion picture.Frequency multiplication and dynamic compensation are the modes of using always that alleviates the dynamic fuzzy phenomenon.But because the doubling frequency of field frequency, the time that causes data-signal with data line DL to charge into liquid crystal cells Clc reduces by half.Simultaneously, because the size of display panels continues to increase, cause the length of data line DL constantly to increase, and the requirement of high aperture limits to some extent to the wide cut of data line DL, therefore, the RC that data-signal transmits on data line DL postpones to increase along with the increase of display panels size, and this also influences the duration of charging of liquid crystal cells Clc.Therefore, need the system drive method that improves the pixel duration of charging in the large size panel.

The utility model content

Technical problem to be solved in the utility model provides a kind of liquid crystal indicator that improves the pixel duration of charging.

The utility model is to solve the problems of the technologies described above the technical scheme that adopts to provide a kind of liquid crystal indicator, comprising:

Liquid crystal panel comprises that the capable n of m is listed as into the pixel of matrix distribution, and each row pixel is connected by a gate line, and each row pixel is connected by parity rows by two data lines;

Gate drivers drives described gate line;

First, second source electrode driver drives the data line on the described parity rows respectively;

Time schedule controller is controlled described gate drivers, first source electrode driver and second source electrode driver;

Wherein, m and n are natural number.

In the above-mentioned liquid crystal indicator, described first source electrode driver and second source electrode driver adopt same polarity output to same data line, to the data line employing opposite polarity output of adjacent column.

In the above-mentioned liquid crystal indicator, described first source electrode driver and second source electrode driver adopt opposite polarity output to two data lines on the same row pixel in each frame.

The utility model contrast prior art has following beneficial effect: the utility model first source electrode driver and second source electrode driver can charge to odd-numbered line on the display panels and the pixel on the even number line respectively, when the pixel on the odd-numbered line is charged, pixel on the even number line also can be charged simultaneously, like this, in a frame, the every capable duration of charging in the available liquid crystal display device framework is doubled, thereby reach the purpose that improves the pixel duration of charging.In addition, first and second source electrode driver adopts the type of drive of row counter-rotating can reach the display effect of single source electrode driver point inversion driving mode in the prior art, has reduced realization cost and consumed power.

Description of drawings

Fig. 1 is existing liquid crystal indicator structural representation.

Fig. 2 is a liquid crystal indicator structural representation of the present utility model.

Fig. 3 is another liquid crystal indicator structural representation of the present utility model.

Fig. 4 is the driving FB(flow block) of the utility model embodiment.

Fig. 5 is the source drive synoptic diagram of the utility model embodiment.

Among the figure:

11 display panels, 12 gate drivers, 13 time schedule controllers

14 source electrode driver 14_a, the first source electrode driver 14_b, second source electrode driver

Embodiment

The utility model will be further described below in conjunction with drawings and Examples.

Fig. 2 shows structure of liquid crystal display panel synoptic diagram of the present utility model, see also Fig. 2, in the present embodiment, the physical resolution of supposing display panels 11 is the capable n row of m, each row pixel is connected by parity rows by two data lines, the first source electrode driver 14_a drives the data line DL1_1 on all odd-numbered lines, DL2_1, the second source electrode driver 14_b drives the data line DL1_2 on all even number lines, DL2_2, time schedule controller 13 flows to the first source electrode driver 14_a with the pixel data of the required demonstration of odd-numbered line, and the pixel data of the required demonstration of even number line flows to the second source electrode driver 14_b.Fig. 3 shows another liquid crystal indicator structural representation of the present utility model, the first source electrode driver 14_a drive data line DL1_2, DL2_2 on all even number lines ..., the second source electrode driver 14_b drive data line DL1_1, DL2_1 on all odd-numbered lines ...

Fig. 4 is the driving FB(flow block) of the utility model embodiment, see also Fig. 4, time schedule controller 13 is given corresponding source electrode driver respectively with the data of adjacent parity rows, when first, two source electrode driver 14_a, 14_b finishes adjacent strange, after the acceptance of idol two line data, time schedule controller 13 control gate drivers 12, by the gate lines G L gating of gate drivers 12 with the TFT of this two line data signal institute respective pixel, first, two source electrode driver 14_a, 14_b is converted to the data-signal that pixel is charged with the data of being accepted, by first, two source electrode driver 14_a, the data line DL that 14_b connected charges to the pixel of gating.In the demonstration time of a frame, time schedule controller 13 circulates successively the TFT on per two row pixels is charged the charging of all pixels on finishing display panels 11 according to above-mentioned process.

The first source electrode driver 14_a of the present utility model and the second source electrode driver 14_b finish the acceptance to odd-numbered line and even number of lines certificate simultaneously, the first source electrode driver 14_a and the second source electrode driver 14_b charge to odd-numbered line on the display panels 11 and the pixel on the even number line respectively, when the pixel on the odd-numbered line is charged, pixel on the even number line is charged simultaneously, like this, in a frame, the every capable duration of charging in the available liquid crystal display device framework is doubled, thereby reach the purpose that improves the pixel duration of charging.

Liquid crystal indicator is the maintenance light-emitting device, is kept the data-signal that charges into by Cs.Because the characteristic of liquid crystal material itself needs to adopt various reversing mode to drive display panels, by periodically being reversed in the polarity of charging data in each liquid crystal cells, reduces flicker and image retention.Data-signal Vdata that the state of liquid crystal is charged into by liquid crystal cells and the control of the voltage difference of public electrode current potential Vcom, and control the transmitance of light then; When voltage difference is timing, definition charging data are positive polarity; When voltage difference when negative, definition charging data are negative polarity.In various reversing mode, simple types is frame counter-rotating (Frame Inversion), and under this driving method, the polarity of the data that each pixel is charged on the picture in same frame is identical, and the polarity of two continuous frames is opposite.Row counter-rotating and some counter-rotating also are common reversing mode.Row counter-rotatings (Column inversion) are in same frame, and the charging data polarity on the same data line is identical, and the charging data polarity on the adjacent data line is opposite; Each pixel is opposite at the charging data polarity of adjacent two frames.Point counter-rotating (dot inversion) is in same frame, and the charging data polarity of neighbor is opposite up and down; Each pixel is opposite at the charging data polarity of adjacent two frames.Different reversing mode realizes that cost, consumed power and display effect have nothing in common with each other.In general, the display effect of some counter-rotating is better than the row counter-rotating, but implementation cost and consumed power are higher.

When liquid crystal indicator when showing the image of two continuous frames, Fig. 5 a is the polarity synoptic diagram of first and second source drive output of former frame, Fig. 5 b be the polarity synoptic diagram that back first and second source drive of one frame is exported.The positive-negative polarity of the polarity of output signal face as defined above is described.Shown in Fig. 5 a, in a frame time, the data-signal of first row of first source electrode driver 14_a output is positive polarity, and the data-signal of each row then is opposite with the polarity of previous column; In a frame time, the data-signal of first row of second source electrode driver 14_b output is negative polarity, and the data-signal of each row then is opposite with the polarity of previous column.At ensuing next frame, shown in Fig. 5 b, the data-signal of first row of first source electrode driver 14_a output is negative polarity, and the data-signal of each row then is opposite with the polarity of previous column; The data-signal of first row of second source electrode driver 14_b output is positive polarity, and the data-signal of each row then is opposite with the polarity of previous column.Under arbitrary frame, the polarity of the data-signal of last each the row output of first and second source electrode driver 14_a, 14_b is identical.For source electrode driver, under same frame, it is low to adopt the same driving method that lists same polarity to list the realization cost and the consumed power of method of opposed polarity output than commonly used same of prior art.Simultaneously, because in the utility model, first and second source electrode driver 14_a, 14_b charge to the capable pixel of odd and even number respectively, therefore, according to the driving method of present embodiment, first and second source electrode driver 14_a, 14_b adopt the type of drive of row counter-rotating can reach the display effect of single source electrode driver point inversion driving mode in the prior art.

Though the utility model discloses as above with preferred embodiment; right its is not in order to limit the utility model; any those skilled in the art; in not breaking away from spirit and scope of the present utility model; when doing a little modification and perfect, therefore protection domain of the present utility model is worked as with being as the criterion that claims were defined.

Claims

1, a kind of liquid crystal indicator comprises:

Gate drivers drives described gate line;

Wherein, m and n are natural number.

2, liquid crystal indicator according to claim 1 is characterized in that, described first source electrode driver and second source electrode driver adopt same polarity output to same data line, to the data line employing opposite polarity output of adjacent column.

3, liquid crystal indicator according to claim 1 is characterized in that, described first source electrode driver and second source electrode driver adopt opposite polarity output to two data lines on the same row pixel in each frame.