CN102693701B - Liquid crystal display device and driving method thereof - Google Patents
Liquid crystal display device and driving method thereof Download PDFInfo
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- CN102693701B CN102693701B CN201110069132.6A CN201110069132A CN102693701B CN 102693701 B CN102693701 B CN 102693701B CN 201110069132 A CN201110069132 A CN 201110069132A CN 102693701 B CN102693701 B CN 102693701B
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Abstract
The present invention discloses a liquid crystal display device and a driving method thereof. The device comprises an upper substrate, a lower substrate, liquid crystals, a film transistor substrate, a data converter, a source driving circuit and a gate driving circuit. A pixel structure of the upper substrate is that a pixel is composed of four sub-pixels of red, green, blue and white in a matrix array in a certain manner; a structure of the lower substrate is that a plurality of film transistors are arranged and combined in a certain manner, wherein film transistors and the sub-pixels on the upper substrate form a one-to-one correspondence. In the liquid crystal display device and the driving method thereof, the white sub-pixel is added, the four sub-pixels of red, green, blue and white are connected in a four-gate connection mode, and gate signals and source signals of a pixel are respectively controlled by a control line and a data line according to different array manners; brightness is increased, and meanwhile, contrast is increased as well; and moreover, power consumption of the apparatus is reduced and cost of the apparatus is lowered.
Description
Technical field
The present invention relates to field of liquid crystal display, in particular, relate to a kind of liquid crystal indicator and driving method thereof.
Background technology
Along with the development of lcd technology, people are also more and more higher to the requirement of liquid crystal indicator in the display of the image such as brightness, color saturation, therefore, the thin film electrocrystal liquid crystal display device with front end reveal competence is then widely used as in the display devices such as computer monitor, televisor and mobile phone.
Thin film electrocrystal liquid crystal display device is by liquid crystal display glass, source electrode drive circuit and gate driver circuit composition.Liquid crystal display glass is made up of upper substrate and infrabasal plate, maintains a certain distance in the middle of upper substrate and infrabasal plate, and is situated between and is filled with liquid crystal.Wherein, upper substrate is colored filter, carries out matrix arrangement according to certain rules by red, green, blue three kinds of primary colours, and synthesizes a pixel by red, green, blue three kinds of groups of primaries, therefore, namely comprises red, green, blue three sub-pixels in a pixel respectively; Infrabasal plate is the arrangement of membrane transistor matrix.Upper substrate in thin film electrocrystal liquid crystal display device and infrabasal plate one_to_one corresponding, and infrabasal plate electric crystal corresponding upper substrate sub-pixel.
In current thin film electrocrystal liquid crystal display device, the conventional framework mode of pixel and control line, data line has following several:
(1) connected mode of single grid, as shown in Figure 1: the signal of red, green, blue three sub-pixels of a pixel is controlled by a control line, and source signal is controlled respectively by three data lines.Wherein, control line G1 and data line S1, S2, S3 control the first row first pixel; Control line G2 and data line S1, S2, S3 control the first pixel of the second row; Control line G3 and data line S1, S2, S3 control first pixel of the third line.
(2) two grid connected mode, as shown in Figure 2: the signal of red, green, blue three sub-pixels of a pixel is controlled respectively by two control lines, and source signal is controlled respectively by two data lines.Wherein, control line G1 and source electrode line S1 controls the first red sub-pixel of the first pixel of the first row, control line G1 and source electrode line S2 controls the first blue subpixels of the first pixel of the first row, and control line G2 and source electrode line S1 controls the first green sub-pixels of the first pixel of the first row; Control line G3 and source electrode line S1 controls the first red sub-pixel of the first pixel of the second row, control line G3 and source electrode line S2 controls the first blue subpixels of the first pixel of the second row, and control line G4 and source electrode line S1 controls the first green sub-pixels of the first pixel of the second row.
The connected mode of (3) three grids, as shown in Figure 3: the signal of red, green, blue three sub-pixels of a pixel is controlled respectively by three control lines, and source signal is controlled by a data line.Wherein, control line G1 and source electrode line S1 controls the red sub-pixel of the first pixel of first row, and control line G2 and source electrode line S1 controls the green sub-pixels of the first pixel of first row, and control line G3 and source electrode line S1 controls the blue subpixels of the first pixel of first row.
R in above-mentioned Fig. 1, Fig. 2 and Fig. 3 represents red, G represents green, B represents blue.
But, adopt framework conventional in above-mentioned three kinds of prior aries, people now can not be met completely and, to the request for utilization of thin film electrocrystal liquid crystal display device, need that a kind of brightness is higher, contrast is higher, and display device power consumption, cost-effective liquid crystal indicator can be reduced simultaneously.
Summary of the invention
In view of this, the invention provides a kind of liquid crystal indicator and driving method thereof, to overcome pixel in prior art in thin film electrocrystal liquid crystal display device and control line, the framework of data line do not meet people's demand, and the problem that power consumption, cost are higher.
For achieving the above object, the invention provides following technical scheme:
A kind of liquid crystal indicator, comprising: by upper substrate, infrabasal plate and be positioned at the liquid crystal display glass substrate that liquid crystal between the two forms;
Red, green, blue three primary colours are made to be converted to the data converter of red, green, blue, white pixel data; The source class driving circuit that input end is connected with described data converter, the output terminal of described source class driving circuit is connected with the source class of each pixel on described upper substrate, the gate driver circuit be connected with the grid of each pixel on described upper substrate;
Dot structure on described upper substrate is: a pixel adopts certain mode matrix to rearrange by red, green, blue, white four sub-pixels;
The structure of described infrabasal plate is: by multiple thin film transistor (TFT) permutation and combination in a certain way, the sub-pixel one_to_one corresponding of described thin film transistor (TFT) on described upper substrate;
And the grid of the thin film transistor (TFT) that the described red, green, blue in a described pixel, white sub-pixel are corresponding is controlled by control line; The source electrode of the thin film transistor (TFT) that described red, green, blue, white sub-pixel are corresponding is controlled by data line.
Preferably, described red, green, blue, white four sub-pixels adopt two row two to arrange or the arrangement mode of a row or column forms a pixel.
Preferably, the structure that the arrangement mode that described employing two row two arranges forms a pixel is:
Red sub-pixels and green sub-pixel form a line, blue sub-pixel and white sub-pixel and form a line;
Red sub-pixels is corresponding with blue sub-pixel form one to arrange, green sub-pixel and white sub-pixel is corresponding forms and arrange;
And the grid of the thin film transistor (TFT) that the described red, green, blue in described same pixel, white sub-pixel are corresponding is controlled by four control lines respectively successively; The source electrode of the thin film transistor (TFT) that described red, green, blue, white sub-pixel are corresponding is by a data line traffic control.
Preferably, the arrangement mode of described employing a line forms the structure of a pixel and is:
Red sub-pixels, green sub-pixel, blue sub-pixel and white sub-pixel are positioned at the horizontal direction arrangement successively in order of same a line;
And the grid of the thin film transistor (TFT) that the described red, green, blue in described same pixel, white sub-pixel are corresponding is controlled by a control line; The source electrode of the thin film transistor (TFT) that described red, green, blue, white sub-pixel are corresponding is respectively by four data line traffic controls.
Preferably, the structure that the arrangement mode that described employing one arranges forms a pixel is:
Red sub-pixels, green sub-pixel, blue sub-pixel and white sub-pixel are positioned at same row homeotropic alignment successively in order;
And the grid of the thin film transistor (TFT) that the described red, green, blue in same pixel, white sub-pixel are corresponding is controlled by four control lines respectively; The source electrode of the thin film transistor (TFT) that described red, green, blue, white sub-pixel are corresponding is by a data line traffic control.
Preferably, described red, green, blue, white four sub-pixels form a pixel and have at least 24 kind of two row two to arrange or the arrangement mode of a row or column.
Based on a driving method for liquid crystal indicator according to claim 1, comprising:
Drive any one control line switch opens, make described control line conducting, described control line is connected with the grid of sub-pixel;
The described sub-pixel grid connected to described control line sends signal;
Open the data line switch controlling sub-pixel source class described in each successively, data line described in conducting;
In the described control line of conducting and described sub-pixel corresponding to described data line, write corresponding pixel data, described pixel data is red, blue, green or white pixel data;
Close described control line switch, return and perform any one this step of control line switch opens of driving.
Preferably, the process of any one control line switch opens of described driving can be: open the control line switch be connected with the grid of red, green, blue, white sub-pixel successively;
The order that described drived control wiretap is opened has 24 kinds at least.
Preferably, before carrying out any one control line switch opens of described driving, comprising:
Presetted pixel data according to white pixel are changed, and obtain with described red, green, blue three primary colours for radix, the red, green, blue color pixel data obtained after deducting described presetted pixel data respectively;
Described presetted pixel data be more than or equal to zero positive number, and be less than or equal to pixel data minimum in described red, green, blue three primary colours.
Preferably, when showing complete white picture, only open the control line switch of corresponding white pixel grid successively, and the data line switch of corresponding white pixel source class, write white pixel data;
When showing complete black picture, close the control line switch of the grid of corresponding white pixel, and the data line switch of corresponding white pixel source class.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of liquid crystal indicator and driving method thereof, normal by red, green, Showing Picture of blue pixel composition, through data converter with red, green, blue, white pixel data output to source electrode drive circuit, by adopting the connected mode of four grids, a pixel is made to comprise red, green, blue, white four sub-pixels, and the signal in a pixel is controlled respectively by four control lines, source signal in a pixel is by a data line traffic control, and by connected modes different between four grids, and control line, the order that data line is opened is different, various ways is provided for controlling four grids.In the formation process of pixel, add white sub-pixels by the present invention, when display white picture, open white pixel, more white light is penetrated from backlight, adds brightness; When showing complete black picture, closing white pixel, white light cannot being penetrated from backlight, make black state brightness less, thus the effect increasing contrast can be played.Further, when showing different pictures, red according to data source, green, blue color depth, red accordingly, green when converting to, blue, during white color depth, red, green, blue color depth same program reduces, therefore carry out luminance compensation by white pixel, thus reach saving cost, save the object of power consumption.The present invention adopts the connected mode of four grids compared with prior art, although gate control lines data increase, but the source electrode line decreased number used, from the cost consideration of driving chip, save certain cost, and the backlight illumination compared with prior art required when device of the present invention reaches identical brightness can reduce, thus reach the object of saving power consumption.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
Fig. 1 is the structural representation of pixel list grid connected mode in prior art;
Fig. 2 is the structural representation of pixel bigrid connected mode in prior art;
Fig. 3 is the structural representation of pixel three grid connected mode in prior art;
The ingredient of Fig. 4 a kind of liquid crystal indicator disclosed in the embodiment of the present invention, and the connected mode structural representation of pixel;
The arrangement architecture schematic diagram of four sub-pixels in Fig. 5 pixel disclosed in Fig. 4 embodiment of the present invention;
Fig. 6 is the disclosed dot structure schematic diagram according to horizontal direction arrangement of the embodiment of the present invention.
Fig. 7 is the disclosed dot structure schematic diagram according to vertical direction arrangement of the embodiment of the present invention;
The driving method process flow diagram of Fig. 8 a kind of liquid crystal indicator disclosed in the embodiment of the present invention;
Fig. 9 disclosed in the embodiment of the present invention driving method use time based on concrete apparatus structure schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In liquid crystal indicator disclosed in the embodiment of the present invention, this liquid crystal indicator forms primarily of backlight, lower Polarizer, thin film transistor base, liquid crystal, color membrane substrates, upper polaroid, data converter, source electrode drive circuit and gate driver circuit.Wherein, thin film transistor base be by membrane transistor pipe in a certain way matrix rearrange, and the red, green, blue on one_to_one corresponding color membrane substrates, the matrix arrangement of white four color sub-pixel, and a pixel is made up of four sub-pixels, comprises above-mentioned red, green, indigo plant, white four color sub-pixel.The present invention adopts the connection control mode of four grids, the signal of a pixel is controlled by control line, controlled the mode of the source signal of a pixel by data line, not only while increase brightness, add contrast, also reduce the power consumption of device, reduce the cost of device.For making this technical scheme clearly, enumerating embodiment below and being described in detail.
Embodiment one
Refer to accompanying drawing 4, the connected mode structural representation of pixel in a kind of liquid crystal indicator disclosed in the embodiment of the present invention one.
This liquid crystal indicator comprises: by upper substrate, infrabasal plate and be positioned at the liquid crystal display glass substrate that liquid crystal between the two forms; For red, green, blue three primary colours being converted to the data converter A of red, green, blue, white pixel data, the source electrode drive circuit B that input end is connected with described data converter A, the described output terminal of source class driving circuit is connected with the source class of each pixel, the gate driver circuit C be connected with the grid of each pixel on described upper substrate.
As in Fig. 4, the dot structure on its upper substrate is: a pixel adopts certain mode matrix to rearrange by red R (Red), green G (green), blue B (blue), white W (White) four sub-pixels.
The structure of infrabasal plate is: by multiple thin film transistor (TFT) permutation and combination in a certain way, and in each sub-pixel one_to_one corresponding of upper substrate.I.e. red, green, blue, each corresponding thin film transistor (TFT) of white sub-pixel.
And, the grid of the thin film transistor (TFT) of the corresponding infrabasal plate of described R, G, B, W in a pixel tetra-sub-pixels is controlled by control line (G4m-3, G4m-2, G4m-1, G4m), and the source electrode of the thin film transistor (TFT) of the corresponding infrabasal plate of described R, G, B, W tetra-sub-pixels is controlled by data line (S2n-1, S2n).
Known in dot structure disclosed in the invention described above embodiment, a pixel is made up of four sub-pixels, respectively corresponding R, G, B, W tetra-sub-pixels.The mode connected in the process of a formation pixel due to four sub-pixels is different, the mode that each sub-pixel is connected with control line and data line also can be different, can have the multiple arrangement mode to R, G, B, W tetra-sub-pixels here to form a pixel.
Wherein, the arrangement mode that above-mentioned R, G, B, W tetra-sub-pixels adopt two row two to arrange forms a pixel.Specifically can see accompanying drawing 4:
R sub-pixel and G sub-pixel form a line, B sub-pixel and W sub-pixel and form a line; Meanwhile, R sub-pixel is corresponding with B sub-pixel form one to arrange, G sub-pixel and W sub-pixel is corresponding forms and arrange, combine and both form a complete pixel.Further, the grid being positioned at thin film transistor (TFT) corresponding to R, G, B, W sub-pixel of same pixel is controlled by four control lines respectively successively; The source electrode of the thin film transistor (TFT) that R, G, B, W sub-pixel is corresponding is by a data line traffic control.
In the formation process of pixel, add white sub-pixels by the present invention, make, when controlling white sub-pixels and opening, more white light to be penetrated from backlight, thus adds brightness; When controlling white sub-pixels and closing, white light cannot be penetrated from backlight, thus the effect of contrast can be increased, namely increase contrast.
In concrete application process, the display data of input or picture are by R, G, B three primary colours form, through data converter, export R, G, B, W pixel data, the pixel data being the colour picture of 255 as maximum color depth is R (100), G (120) and B (150), R (100-X) is converted to after data converter, G (120-X), B (150-X) and W (X), wherein, X is a positive number being more than or equal to zero, and be less than or equal to (R, G, B) value minimum in, namely this value of X can according to demand or require to set.
Such as, under the liquid crystal indicator of normal white mode, when realizing complete black picture, only need to apply R (0) respectively to R, G, B, W, G (0), B (0), the voltage that W (0) color depth is corresponding; When realizing complete white picture, 0 volt of voltage being applied to R, G, B, W, just can realize R (255), G (255), B (255), the color depth of W (255); And in realization as R (100), G (120), during the colour picture of B (150) color depth, only need R, G, B, W pixel applies R (100-X), G (120-X), B (150-X), the pressurization that W (X) color depth is corresponding.
As adopted the liquid crystal display dress display of normal black pattern, when showing black picture, R, G, B, W pixel only need apply the voltage of 0 volt, just can realize R (0), G (0), B (0), the color depth of W (0); When showing complete white picture, the pixel transistor that R, G, B, W are corresponding is all opened, and applies R (255), G (255), B (255), the voltage that W (255) color depth is corresponding to R, G, B, W pixel; When display R (100), G (120), during the colour picture of B (150) color depth, to R, G, B, W pixel applies R (100-X), G (120-X), B (150-X), the voltage that W (X) color depth is corresponding.Due to R in execution said process, G, the reduction brightness of B respective degrees, therefore, carried out the compensation of brightness by W, so R, G, the source voltage that the transistor that B is corresponding applies above reduces, and the voltage that the transistor only having W corresponding applies above increases, and will play the object of the power consumption of saving source electrode drive circuit like this.
In summary, in the present invention by increasing W pixel, brightness can be improved.Compared to only having R, the liquid crystal indicator of G, B pixel, when black state brightness is the same, adopts R, G, B, W pixel, can play the effect increasing contrast.It should be noted that, if only increase W pixel, it is not effectively controlled, also can only increase brightness, therefore, also extremely important to the control of W pixel in the present invention.And contrast adopts the liquid crystal indicator of R, G, B, W pixel and adopts R, G, the liquid crystal indicator of B pixel, when realizing same brightness, adopts R, G, the liquid crystal indicator of B, W pixel needs the backlight than the liquid crystal indicator adopting R, G, B pixel more low-light level.The power consumption of backlight accounts for the power consumption ratio of about 70% in whole liquid crystal indicator.Adopt the liquid crystal indicator of R, G, B, W pixel can play the effect reducing power consumption.
Based on accompanying drawing 4, the concrete control procedure for different pixels is:
When only having G1 to open, write data by S1 to the R sub-pixel of the first row, first row; Data are write to the G sub-pixel of the first row, the 4th row by S2.From left to right circulation is carried out successively.
When only having G2 to open, write data by S1 to the G sub-pixel of the first row, secondary series; Data are write to the first row, tertial R sub-pixel by S2.From left to right circulation is carried out successively.
When only having G3 to open, write data to the B sub-pixel of the second row, first row by S1; The W sub-pixel write data of the second row, the 4th row are given by S2.From left to right circulation is carried out successively.
When only having G4 to open, write data to the W sub-pixel of the second row, secondary series by S1; Write data to the second row, tertial B sub-pixel by S2.From left to right circulation is carried out successively.
When only having G5 to open, write data by S1 to the R sub-pixel of the third line, first row; Data are write to the G sub-pixel of the third line, the 4th row by S2.From left to right circulation is carried out successively.
When only having G6 to open, write data by S1 to the G sub-pixel of the third line, secondary series; Data are write to the third line, tertial R sub-pixel by S2.From left to right circulation is carried out successively.
When only having G7 to open, write data by S1 to the B sub-pixel of fourth line, first row; Data are write to the W sub-pixel of fourth line, the 4th row by S2.From left to right circulation is carried out successively.
When only having G8 to open, write data by S1 to the W sub-pixel of fourth line, secondary series; Data are write to fourth line, tertial B sub-pixel by S2.From left to right circulation is carried out successively.
Open the action that a width picture is write from top to bottom successively, when next picture write, the action again circulated above.
It can thus be appreciated that the type of drive of above-mentioned pixel presses the order execution of G1 to G2 to G3 to G4, but, about the order driven, the present invention is not limited to this, also can drive according to other mode, the mode according to permutation and combination draws, the mode of driving has 24 kinds of modes.
It should be noted that, above-mentioned R, G, B, W tetra-sub-pixels have at least 24 kind of two row two to arrange arrangement mode when enough becoming a pixel, accompanying drawing 4 is a kind of arrangement mode wherein, and these 24 kinds concrete arrangement modes refer to accompanying drawing 5, and its type of drive also with above-mentioned driving similar process.
In this liquid crystal indicator, first sub-pixel of the first grid line traffic control the first row on infrabasal plate and the 4th sub-pixel, second sub-pixel of second grid line traffic control the first row and the 3rd sub-pixel, 3rd gate line controls first sub-pixel and the 4th sub-pixel of the second row, and the 4th gate line controls second sub-pixel and the 3rd sub-pixel of the second row; And the source electrode of the dissimilar sub-pixel of in same pixel four is by a data line traffic control.
The four grid connected modes adopted by the invention described above, the source electrode line decreased number compared with prior art used, gate control lines data increase, but from the cost consideration of driving chip, in fact the present invention saves certain cost, and, at device of the present invention compared with prior art, the backlight illumination required for the present invention when reaching identical brightness can reduce, thus reaches the object of saving power consumption.
In addition, above-mentioned R, G, B, W tetra-sub-pixels also can adopt the arrangement mode of a row or column to form a pixel.As shown in Figure 6, the another kind of transistor syndeton of R, G, B, W disclosed in the embodiment of the present invention.Be specially R, G, B, W pixel be positioned at same row in order successively horizontal direction arrangement open; Further, the grid of the thin film transistor (TFT) that R, G, B, W sub-pixel in same pixel is corresponding is controlled by a control line; The source electrode of the thin film transistor (TFT) that R, G, B, W sub-pixel is corresponding is respectively by four data line traffic controls.
When only having G1 to open, S1 is to the R sub-pixel of the first row, first row write data, and S2 is to the G sub-pixel of the first row, secondary series write data, and S3 is to the first row, tertial B sub-pixel write data, S4 is to the W sub-pixel write data of the first row, the 4th row, and said process completes successively.
When only having G2 to open, S1 gives the R sub-pixel write data of the second row, first row, and S2 gives the G sub-pixel write data of the second row, secondary series, and S3 gives the second row, tertial B sub-pixel write data, S4 gives the W sub-pixel write data of the second row, the 4th row, and said process completes successively.
When only having G3 to open, S1 is to the R sub-pixel of the third line, first row write data, and S2 is to the G sub-pixel of the third line, secondary series write data, and S3 is to the third line, tertial B sub-pixel write data, S4 is to the W sub-pixel write data of the third line, the 4th row, and said process completes successively.
It should be noted that, the built-up sequence of the color horizontal direction of R, G, B, W pixel arrangement has 24 kinds of different combinations at least.Gate control lines G1, G2, G3 to Gm-1, Gm can sequenced mode open successively, also can open successively by backward.According to said structure arrangement pixel, in the process driving pixel, the cost of driving chip can be reduced equally, and, compared with the structure of prior art, the backlight illumination required for the present invention when reaching identical brightness can reduce, thus reaches the object of saving power consumption.
In addition, R, G, B, W are equally applicable to the transistor syndeton of Fig. 7, and the arrangement of R, G, B, W pixel vertical direction is opened; Further, the grid of the thin film transistor (TFT) that R, G, B, W sub-pixel in same pixel is corresponding is controlled by four control lines respectively; The source electrode of the thin film transistor (TFT) that R, G, B, W sub-pixel is corresponding is by a data line traffic control.
When only having G1 to open, S1 is to the R sub-pixel of the first row, first row write data, and S2 is to the R sub-pixel of the first row, secondary series write data, and S3 is to the first row, tertial R sub-pixel write data, and said process carries out successively.
When only having G2 to open, S1 gives the G sub-pixel write data of the second row, first row, and S2 gives the G sub-pixel write data of the second row, secondary series, and S3 is to the third line, tertial G sub-pixel write data, and said process carries out successively.
When only having G3 to open, S1 is to the B sub-pixel of the third line, first row write data, and S2 is to the B sub-pixel of the third line, secondary series write data, and S3 is to the third line, tertial B sub-pixel write data, and said process carries out successively.
When only having G4 to open, S1 is to the W sub-pixel of fourth line, first row write data, and S2 is to the W sub-pixel of fourth line, secondary series write data, and S3 is to fourth line, tertial W sub-pixel write data, and said process carries out successively.
It should be noted that, the color vertical direction permutation and combination of R, G, B, W pixel order has 24 kinds of different combinations at least.Gate control lines G1, G2, G3, G4 to G4m-3, G4m-2, G4m-1, G4m can sequenced mode open successively, also can open successively by the mode of backward.Equally, according to said structure arrangement pixel, in the process driving pixel, also the object of the cost reducing driving chip can be realized, simultaneously compared with the structure of prior art, the backlight illumination required for the present invention when reaching identical brightness can reduce, thus reaches the object of saving power consumption.
Describe a kind of liquid crystal indicator in embodiment disclosed in the invention described above in detail, based on this device, the invention also discloses a kind of driving method of liquid crystal indicator, refer to accompanying drawing 8, mainly comprise the following steps in the method:
Step S101, drives any one control line switch opens, and make described control line conducting, described control line is connected with the grid of sub-pixel.
Step S102, the described sub-pixel grid connected to described control line sends signal.
Step S103, open the data line switch controlling sub-pixel source class described in each successively, data line described in conducting, described data line is connected with described sub-pixel source class.
Step S104, in the described control line of conducting and described sub-pixel corresponding to described data line, write corresponding pixel data, described pixel data is red, blue, green or white pixel data.
Step S105, closes described control line switch, returns and performs step S101, and circulation performs above-mentioned steps, namely drives and opens another control line switch.
It should be noted that, before driving liquid crystal indicator disclosed by the invention, the information be made up of R, G, B three primary colours received is needed to change via data converter, obtain R, G, B, W color pixel data, corresponding R, G, B, W color pixel data could be write in the sub-pixel in correspondence in the process driven.When data converter conversion three primary colours, the mode of tabling look-up can be adopted the pixel data of R, G, B three primary colours received to be converted to corresponding R, G, B, W color pixel data; Can also change according to the presetted pixel data of W color pixel, obtain with described R, G, B three primary colours for radix, R, G, B color pixel data obtained after deducting described presetted pixel data respectively; Such as, maximum color depth is a pixel data of the colour picture of 255 is R (100), G (120) and B (150), R (100-X), G (120-X), B (150-X) and W (X) is converted to after data converter, wherein, X is a positive number being more than or equal to zero, and be less than or equal to (R, G, B) value minimum in, namely X is the presetted pixel data of white pixel, and this value can according to demand or require to set.
In above-mentioned implementation, refer to accompanying drawing 9, for according to the first pixel of two row two row arrangement modes and the second pixel, drive the embody rule process of the control line switch opens of connexon pixel gates to be:
First, only open G1, write data to the R sub-pixel of first pixel by S1, S2 gives the G sub-pixel write data of second pixel; Next, only open G2, write data to the G sub-pixel of first pixel by S1, S2 gives the R sub-pixel write data of second pixel; Following again, only open G3, write data to the B sub-pixel of first pixel by S1, S2 gives the W sub-pixel write data of second pixel; Finally, then open G4, write data to the W sub-pixel of first pixel by S1, S2 gives the B sub-pixel write data of second pixel.
It should be noted that, the process of any one control line switch opens of described driving can be: open the control line switch (G1, G2, G3, G4) connecting red R, green G, blue B, white W sub-pixel grid successively; The order that this drived control wiretap is opened has 24 kinds at least according to the mode of permutation and combination.
In addition, at driving method disclosed in the invention described above embodiment, when driving liquid crystal indicator disclosed in the invention described above embodiment, when showing complete white picture, except the complete white picture of control R, G, B pixel voltage display, only need open the control line switch of corresponding W color pixel grid successively, and the data line switch of corresponding W color pixel source class, write W color pixel data, make the white light of more backlight pass through; When showing complete black picture, except the complete black picture of control R, G, B pixel voltage display, close the control line switch of the grid of corresponding W color pixel, and the data line switch of corresponding W color pixel source class, the contrast of image is increased with this; When showing different pictures, then in the process of conversion, data converter is utilized to convert the color depth of corresponding R, G, B, W to according to the color depth of R, G, B three primary colours received, in this process, the color depth same program of R, G, B reduces, and carries out luminance compensation by white.Thus reach saving cost, save the object of power consumption.
It should be noted that, the driving method of liquid crystal indicator disclosed in the invention described above embodiment, be applicable to arrange according to employing two row two or the arrangement mode of a row or column forms the liquid crystal indicator of a pixel.
In sum:
By liquid crystal indicator disclosed in the embodiment of the present invention and driving method thereof, by increasing a white sub-pixels when a structure pixel, when display white picture, open white pixel, more white light is penetrated from backlight, thus adds brightness; When showing complete black picture, close white pixel, white light cannot be penetrated from backlight, and black state brightness is less, thus can play the effect increasing contrast, namely increases contrast.Simultaneously, the source electrode line decreased number that the mode that compared with prior art the present invention adopts four grids to connect uses, gate control lines data increase, but from the cost consideration of driving chip, in fact the present invention saves certain cost, and, at device of the present invention compared with prior art, the backlight illumination required for the present invention when reaching identical brightness can reduce, thus reaches the object of saving power consumption.
In this instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a liquid crystal indicator, is characterized in that, comprising: by upper substrate, infrabasal plate and be positioned at the liquid crystal display glass substrate that liquid crystal between the two forms;
Red, green, blue three primary colours are made to be converted to the data converter of red, green, blue, white pixel data; The source class driving circuit that input end is connected with described data converter, the output terminal of described source class driving circuit is connected with the source class of each pixel on described upper substrate, the gate driver circuit be connected with the grid of each pixel on described upper substrate;
Dot structure on described upper substrate is: a pixel adopts certain mode matrix to rearrange by red, green, blue, white four sub-pixels;
The structure of described infrabasal plate is: by multiple thin film transistor (TFT) permutation and combination in a certain way, the sub-pixel one_to_one corresponding on described thin film transistor (TFT) and described upper substrate;
And the grid of the thin film transistor (TFT) that the described red, green, blue in a described pixel, white sub-pixel are corresponding is controlled by control line; The source electrode of the thin film transistor (TFT) that described red, green, blue, white sub-pixel are corresponding is controlled by data line;
Wherein, when described red, green, blue, white four sub-pixels adopt two row two to arrange or the arrangement mode of row forms a pixel, the grid of the thin film transistor (TFT) that the described red, green, blue in described same pixel, white sub-pixel are corresponding is controlled by four control lines respectively successively; The source electrode of the thin film transistor (TFT) that described red, green, blue, white sub-pixel are corresponding is by a data line traffic control; Or when described red, green, blue, white four sub-pixels adopt the arrangement mode of a line to form a pixel, the grid of the thin film transistor (TFT) that the described red, green, blue in described same pixel, white sub-pixel are corresponding is controlled by a control line; The source electrode of the thin film transistor (TFT) that described red, green, blue, white sub-pixel are corresponding is respectively by four data line traffic controls.
2. device according to claim 1, is characterized in that, the structure that the arrangement mode that described employing two row two arranges forms a pixel is:
Red sub-pixels and green sub-pixel form a line, blue sub-pixel and white sub-pixel and form a line;
Red sub-pixels is corresponding with blue sub-pixel form one to arrange, green sub-pixel and white sub-pixel is corresponding forms and arrange.
3. device according to claim 1, is characterized in that, the structure that the arrangement mode of described employing a line forms a pixel is:
Red sub-pixels, green sub-pixel, blue sub-pixel and white sub-pixel are positioned at the horizontal direction arrangement successively in order of same a line.
4. device according to claim 1, is characterized in that, the structure that the arrangement mode that described employing one arranges forms a pixel is:
Red sub-pixels, green sub-pixel, blue sub-pixel and white sub-pixel are positioned at same row homeotropic alignment successively in order.
5. device according to claim 1, is characterized in that, described red, green, blue, white four sub-pixels form a pixel and have at least 24 kind of two row two to arrange or the arrangement mode of a row or column.
6. based on a driving method for liquid crystal indicator according to claim 1, it is characterized in that, comprising:
Drive any one control line switch opens, make described control line conducting, described control line is connected with the grid of sub-pixel;
The described sub-pixel grid connected to described control line sends signal;
Open the data line switch controlling sub-pixel source class described in each successively, data line described in conducting;
In the described control line of conducting and described sub-pixel corresponding to described data line, write corresponding pixel data, described pixel data is red, blue, green or white pixel data;
Close described control line switch, return and perform any one this step of control line switch opens of driving.
7. method according to claim 6, is characterized in that, the process of any one control line switch opens of described driving can be: open the control line switch be connected with the grid of red, green, blue, white sub-pixel successively;
The order that described drived control wiretap is opened has 24 kinds at least.
8. method according to claim 6, is characterized in that, before carrying out any one control line switch opens of described driving, comprising:
Presetted pixel data according to white pixel are changed, and obtain with described red, green, blue three primary colours for radix, the red, green, blue color pixel data obtained after deducting described presetted pixel data respectively;
Described presetted pixel data be more than or equal to zero positive number, and be less than or equal to pixel data minimum in described red, green, blue three primary colours.
9. method according to claim 6, is characterized in that, when showing complete white picture, only opens the control line switch of corresponding white pixel grid successively, and the data line switch of corresponding white pixel source class, write white pixel data;
When showing complete black picture, close the control line switch of the grid of corresponding white pixel, and the data line switch of corresponding white pixel source class.
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| CN103207489A (en) * | 2013-03-27 | 2013-07-17 | 京东方科技集团股份有限公司 | Pixel structure, driving method thereof and display device |
| CN103984136B (en) * | 2014-05-06 | 2017-05-17 | 深圳市华星光电技术有限公司 | Liquid crystal display (LCD) panel and LCD device |
| CN103928011B (en) * | 2014-05-12 | 2016-03-09 | 深圳市华星光电技术有限公司 | The display packing of image and display system |
| CN105047157B (en) * | 2015-08-19 | 2017-10-24 | 深圳市华星光电技术有限公司 | A kind of source electrode drive circuit |
| CN106405966A (en) * | 2016-11-02 | 2017-02-15 | 武汉华星光电技术有限公司 | Liquid crystal panel and array substrate thereof |
| CN107578738B (en) * | 2017-09-12 | 2023-06-23 | 维沃移动通信有限公司 | Display driving circuit, method and mobile terminal |
| CN109785792B (en) | 2017-11-10 | 2020-12-25 | 京东方科技集团股份有限公司 | Display panel driving method and device and display device |
| CN111477146A (en) * | 2020-04-09 | 2020-07-31 | 福建华佳彩有限公司 | Display screen structure with high screen ratio and driving method thereof |
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