CN105261337A - Touch control display apparatus and driving method thereof, and drive circuit - Google Patents

Touch control display apparatus and driving method thereof, and drive circuit Download PDF

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Publication number
CN105261337A
CN105261337A CN201410302782.4A CN201410302782A CN105261337A CN 105261337 A CN105261337 A CN 105261337A CN 201410302782 A CN201410302782 A CN 201410302782A CN 105261337 A CN105261337 A CN 105261337A
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China
Prior art keywords
touch control
control unit
display
capacitance value
display unit
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CN201410302782.4A
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CN105261337B (en
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莫良华
蒋新喜
蔡宁宁
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Dun Tai Electronics Co Ltd
FocalTech Systems Co Ltd
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Dun Tai Electronics Co Ltd
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Priority to CN201410302782.4A priority Critical patent/CN105261337B/en
Priority to TW103130171A priority patent/TWI537802B/en
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Abstract

The invention provides a touch control display apparatus and a driving method thereof, and a drive circuit. The driving method is applied to touch control display equipment containing but not limited to the touch control display apparatus provided by the invention. The touch control display apparatus comprises a plurality of touch control units for realizing touch sensing and a plurality of display units for realizing image displaying. The driving method includes: according to gray-scale voltages applied to all display units, influence coefficients and influence weights on detection capacitance values of the touch control units by all display units currently are obtained; on the basis of the obtained influence coefficients as well as the stored influence weights, correction factors, affected by the gray-scale voltages, of the detection capacitance values of all touch control units are obtained; and according to the correction factors obtained by a current display image, measurement values of touch control induction are corrected. Therefore, the influences on the detection capacitance values of all touch control units by difference gray-scale voltages during picture displaying are eliminated in the corrected measurement values, thereby effectively improving precision of touch detection.

Description

Touch control display apparatus and driving method thereof and driving circuit
Technical field
The present invention relates to touch-control display field, particularly relate to a kind of touch control display apparatus and driving method thereof and driving circuit.
Background technology
Capacitive touch screen relies on its highly sensitive advantage in the mobile devices such as mobile phone, to instead of resistive touch screen widely, in order to improve the frivolous property of mobile device further, in traditional liquid crystal display screen technique, integrated capacitive touches the hot topic that measuring ability becomes research, embedded in box (InCell) touch panel is the mode of a kind of integrated capacitive touch measuring ability wherein, touch detecting electrode is integrated on the array base palte of LCDs by InCell touch panel, make in LCDs without the need to independent capacitive touch screen of fitting, LCDs self is integrated with the function touching and detect, there is the integration of height and frivolous property.Public electrode piecemeal is touched the detecting electrode detected or the emitting electrode use be used as when mutual capacitance detects as self-capacitance, can save and form special detecting electrode on array base palte, effectively can improve the aperture opening ratio of LCDs.
Detecting to realize touching, needing the various parasitic capacitance problems considering public electrode.Fig. 1 shows the equivalent circuit diagram of a sub-pixel unit of display unit in a kind of touch control display apparatus, described sub-pixel unit comprises thin film transistor (TFT), described thin film transistor (TFT) comprises grid 01, source electrode 02, drain electrode 03, described grid 01 is electrically connected with gate line 07, described source electrode 02 is electrically connected with data line 06, drain electrode 03 is connected with pixel electrode 04, public electrode 05 is connected with Vcom line 08, by the work of above-mentioned circuit and device, liquid crystal between pixel electrode 04 and public electrode 05 is deflected, to control the transmittance of sub-pixel unit.There is between pixel electrode 04 and public electrode 05 liquid crystal capacitance Clc, stray capacitance in figure has: the stray capacitance Cmg of public electrode 05 pair of gate line 07, the stray capacitance Cms of public electrode 05 pair of data line 06, public electrode 05 is to the stray capacitance Cs of the external frame (not shown) of screen, the grid 01 of thin film transistor (TFT) and the stray capacitance Cgd of drain electrode 03, the stray capacitance Cgs of grid 01 and source electrode 02.
When public electrode 05 is used as the detecting electrode of self-capacitance touch detection, the capacitance detected is stray capacitance Cs, and namely public electrode 05 is to the electric capacity of the external frame of screen (thinking the ground end that self-capacitance detects).During due to picture display change, cause liquid crystal deflection angle different when applying different gray scale voltages between pixel electrode 04 from public electrode 05, the chymoplasm specific inductive capacity making Clc electric capacity is caused to change, indirectly cause different viewing areas, even without touching, the liquid crystal capacitance Clc of zones of different is also different.When carrying out touch and detecting, stray capacitance Cs is equivalent to the electric capacity between public electrode 05 and finger and the superposing of electric capacity between finger with the earth, because public electrode 05 is the battery lead plate that liquid crystal capacitance Clc and stray capacitance Cs shares, can think to the measured value of stray capacitance Cs containing partial liquid crystal electric capacity Clc, when therefore applying different gray scale voltages between pixel electrode 04 from public electrode 05, the change of liquid crystal capacitance Clc can cause stray capacitance Cs is changed, thus brings interference to touch detection.
When public electrode 05 is used as the detecting electrode of mutual capacitance touch detection, or when utilizing and thin film transistor (TFT) other electrode on the same substrate touches as mutual capacitance or self-capacitance the detecting electrode detected, the change of liquid crystal deflection bring interference can to equally touch detection.
Therefore, the interference that when how to reduce to be shown by picture, the change of liquid crystal deflection brings touch Detection capacitance value, and then improve the precision touching and detect, become those skilled in the art's problem demanding prompt solution.
Summary of the invention
The problem that the present invention solves proposes a kind of touch control display apparatus and driving method thereof and driving circuit, and when reducing show by picture, the change of liquid crystal deflection is to the interference touching Detection capacitance value and bring, and then improves the precision touching detection.
For solving the problem, the present invention proposes a kind of driving method of touch control display apparatus, comprise: a kind of driving method of touch control display apparatus, it is characterized in that, this touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display, and this driving method comprises:
Store the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value;
Store and there is the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from touch control unit;
Apply gray scale voltage to each display unit, carry out image display to drive described touch control display apparatus;
According to the gray scale voltage being applied to each display unit, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit;
According to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage;
Drive described touch display unit to carry out touch sensible, revise according to the measured value of modifying factor to touch sensible that current display image obtains.
Optionally, store the step of different gray scale voltage to the influence coefficient of touch control unit Detection capacitance value to comprise:
Apply gray scale voltage frame by frame to all display units of touch control display apparatus, wherein, for same frame, apply same gray scale voltage to all display units, for different frame, apply different gray scale voltages to all display units;
Apply gray scale voltage in the step of all display units at every frame, all detect the Detection capacitance value being positioned at the touch control unit of touch control display apparatus center, to obtain the touch control unit Detection capacitance value corresponding from different gray scale voltage;
Using touch control unit Detection capacitance value corresponding to a preset gray scale voltage as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtains the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
Optionally, store the method for different gray scale voltage to the influence coefficient of touch control unit Detection capacitance value also to comprise: after the different gray scale voltage of acquisition is to the influence coefficient of touch control unit Detection capacitance value, generate the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage, store described look-up table.
Optionally, described multiple display unit is arranged in array, and stores the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation and comprises:
Region dividing is carried out to array of display cells, using the central point of touch control unit as inspection center, choose described inspection center just to the display unit of position as center display unit, centered by described center display unit, delimit the first reference zone comprising one or more display unit, first gray scale voltage is applied to the display unit in described first reference zone, second gray scale voltage is applied to all the other display units outside the first reference zone, touch control capacitance detection is carried out to touch control unit, to obtain the touch control unit Detection capacitance value that will now measure, and as the first Detection capacitance value,
Centered by described center display unit, delimit the second reference zone comprising multiple display unit, the second reference zone is made to comprise described first reference zone, the quantity of the display unit in described second reference zone is greater than the quantity of the display unit in the first reference zone, first gray scale voltage is applied to the display unit in described second reference zone, second gray scale voltage is applied to all the other display units outside the second reference zone, touch control capacitance detection is carried out to touch control unit, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value;
Bring the first Detection capacitance value and the second Detection capacitance value into weight equation, the weighing factor using the numerical value obtained as the multiple display units within the second reference zone and outside the first reference zone.
Optionally, store the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation also to comprise: record the first gray scale voltage, the influence coefficient that described first gray scale voltage is corresponding is maximum, record the second gray scale voltage, the influence coefficient that described second gray scale voltage is corresponding is minimum.
Optionally, bring the first Detection capacitance value and the second Detection capacitance value into weight equation, the step using the numerical value obtained as the weighing factor of the multiple display units within the second reference zone and outside the first reference zone also comprises:
Using the area of the first reference zone as the first parameter;
Using the area of the second reference zone as the second parameter;
Second gray scale voltage is applied to all display units of touch control display apparatus, using the touch control unit Detection capacitance value now measured as tri-consult volume;
First gray scale voltage is applied to all display units of touch control display apparatus, using the touch control unit Detection capacitance value now measured as the 4th parameter;
Bring described first parameter, the second parameter, tri-consult volume, the 4th parameter, the first Detection capacitance value and the second Detection capacitance value into described weight equation in the lump.
Optionally, described weight equation is:
y＝(C2-C1)/[(Cmax-Cmin)*(area2-area1)]，
Wherein, y is weighing factor, and C2 is the second Detection capacitance value, and C1 is the first Detection capacitance value, and Cmax is the 4th parameter, and Cmin is tri-consult volume, and area2 is the second parameter, and area1 is the first parameter.
Optionally, store the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation also to comprise:
By repeatedly delimiting the first reference zone and the second reference zone, obtain the step of the first Detection capacitance value and the second Detection capacitance value, wherein using second reference zone of delimiting at every turn as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, after obtaining each delimitation the first reference zone and the second reference zone, the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
Optionally, delimit the first reference zone, the step of the second reference zone comprise: make the shape of described first reference zone, the second reference zone and the mating shapes of described touch control unit.
Optionally, the shape of described touch control unit is rectangle, and described first reference zone, the second reference zone are centered by described center display unit, comprise the referential array of multiple display unit, and line number and the columns of described referential array are equal.
Optionally, the shape of described touch control unit is circular, described first reference zone, the second reference zone are centered by described center display unit, comprise the display unit set of multiple display unit, the outermost multiple display unit of described display unit set is equal to the distance of center display unit.
Optionally, store the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation also to comprise:
Based on described weighing factor, Region dividing is carried out to display unit, set up the sample area that each touch control unit is corresponding, the weighing factor of display unit to touch control unit being positioned at described sample area is more than or equal to and is positioned at the weighing factor of the display unit outside described sample area to touch control unit;
Store display unit in sample area corresponding to each touch control unit and sample area to the weighing factor of touch control unit.
Optionally, carry out Region dividing based on described weighing factor to display unit, the step setting up sample area corresponding to each touch control unit comprises:
Repeatedly delimit the step of the first reference zone and the second reference zone, wherein using second reference zone of delimiting at every turn as first reference zone of delimiting next time;
Using the first reference zone area of delimiting at every turn as the first parameter;
Using the second reference zone area of delimiting at every turn as the second parameter;
Each delimit the first reference zone and the second reference zone after, obtain the first Detection capacitance value and the second Detection capacitance value, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter;
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtains the 7th parameter;
When the 5th parameter is less than or equal to the 7th parameter, using the second current reference zone as sample area.
Optionally, described display unit comprises: red sub-pixel unit, green sub-pixels unit, blue subpixels unit;
Described basis is applied to the gray scale voltage of each display unit, and the step obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit comprises:
Obtain the influence coefficient that on red sub-pixel unit, green sub-pixels unit, blue subpixels unit, each gray scale voltage is corresponding respectively;
Obtain the mean value of red sub-pixel unit, green sub-pixels unit, the corresponding influence coefficient of blue subpixels unit, using described mean value as display unit to the influence coefficient of touch control unit Detection capacitance value.
Optionally, described basis is applied to the gray scale voltage of each display unit, the step obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit comprises: complete in a two field picture display when touch control display apparatus carries out image display, before the display of another two field picture, according to the gray scale voltage being applied to each display unit, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit.
Optionally, described touch control display apparatus comprises the first viewing area and the second viewing area;
Apply gray scale voltage to each display unit, comprise with the step driving described touch control display apparatus to carry out image display: in the first viewing area display unit charging complete carry out image display time, apply each display unit of gray scale voltage to the second viewing area, carry out image display to drive the second viewing area;
Described basis is applied to the gray scale voltage of each display unit, the step obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit comprises: according to the gray scale voltage being applied to each display unit in the first viewing area, obtains the current influence coefficient to touch control unit Detection capacitance value of each display unit in the first viewing area.
The present invention also provides a kind of driving circuit of touch control display apparatus, and this touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display, and described driving circuit comprises:
Driver module, carries out touch sensible for driving described touch display unit;
Display module, for applying gray scale voltage to each display unit, carries out image display to drive described touch control display apparatus;
Analysis module, for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, and store there is from touch control unit different relative position relation display unit to the weighing factor of touch control unit Detection capacitance value;
Described analysis module is also applied to the gray scale voltage of each display unit for basis, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit, according to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and revise according to the measured value of modifying factor to the touch sensible that driver module obtains that current display image obtains.
Optionally, described analysis module comprises:
First memory module, for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value;
Second memory module, for store there is from touch control unit different relative position relation display unit to the weighing factor of touch control unit Detection capacitance value;
Correcting module, with described driver module, display module, first memory module is connected with the second memory module, for being applied to the gray scale voltage of each display unit according to display module, gray scale voltage is obtained to the influence coefficient of touch control unit Detection capacitance value from described first memory module, and obtain the weighing factor of each display unit to touch control unit Detection capacitance value from described second memory module, according to obtained influence coefficient and weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and according to the modifying factor that current display image obtains, the Detection capacitance value that driver module obtains is revised.
Optionally, described first memory module is for storing the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage.
Optionally, each touch control unit is corresponding with the sample area be made up of multiple display unit, and the weighing factor of display unit to touch control unit being positioned at described sample area is more than or equal to and is positioned at the weighing factor of the display unit outside described sample area to touch control unit;
Described second memory module is for storing the weighing factor of the display unit in described sample area to touch control unit.
Optionally, described correcting module is applied to the gray scale voltage of the display unit in sample area for obtaining driver module, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit in sample area by the first memory module, the current influence coefficient to touch control unit Detection capacitance value of each display unit forms the first matrix;
Described correcting module is also for obtaining the weighing factor of the display unit in described sample area to touch control unit by described second memory module, and the weighing factor of the display unit in described sample area to touch control unit forms the second matrix;
Each influence coefficient in described first matrix can be multiplied with the weighing factor of influence coefficient co-located with the second matrix by described correcting module, obtain the 3rd matrix be made up of multiple correction factor, in described 3rd matrix, numerical value sum is as modifying factor.
Optionally, described analysis module is used for when driver module drives described touch display unit to carry out touch sensible, the measured value of the touch sensible of each touch control unit obtained by driver module and modifying factor are brought electric capacity into and are repaired equation, obtain capacitance after the correction of each touch control unit, to revise rear capacitance as actual touch detected value.
Optionally, described analysis module is used for when touch control display apparatus carries out image display complete in a two field picture display, before the display of another two field picture, according to the gray scale voltage being applied to each display unit, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit.
Optionally, described touch control display apparatus comprises the first viewing area and the second viewing area;
When described display module carries out image display for the charging of display unit in the first viewing area is complete, apply each display unit of gray scale voltage to the second viewing area, carry out image display to drive the second viewing area;
Described analysis module is used for, according to the gray scale voltage being applied to each display unit in the first viewing area, obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit in the first viewing area.
Optionally, described driver module, display module and described analysis module are integrated in a touch display chip.
Optionally, described driver module and described analysis module are integrated in a touch chip, and described display module is arranged at a display chip.
The present invention also provides a kind of touch control display apparatus, comprising:
For realizing multiple touch control unit of touch-control sensing and the multiple display units for realizing image display;
The driving circuit of described touch control display apparatus provided by the invention, and the driving circuit of described touch control display apparatus is connected with multiple display unit with described multiple touch control unit, the driving circuit of described touch control display apparatus is for detecting the touch control unit Detection capacitance value of described multiple touch control unit.
Optionally, the liquid crystal layer that described touch control display apparatus also comprises first substrate, second substrate and is arranged between first substrate, second substrate, described display unit comprises the pixel electrode be arranged on described first substrate, and described touch control unit comprises the touch detecting electrode be arranged on described first substrate.
Optionally, described first substrate is provided with public electrode, described public electrode is used as the touch detecting electrode of described touch control unit.
Optionally, described touch control unit Detection capacitance value is the measured value of capacitance between the touch detecting electrode of described touch control unit and ground are held.
Compared with prior art, technical scheme of the present invention has the following advantages:
The driving method of touch control display apparatus of the present invention is used in touch control display apparatus, and described touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display.This driving method comprises the different gray scale voltage of storage to the influence coefficient of touch control unit Detection capacitance value; Store and there is the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from touch control unit; Apply gray scale voltage to each display unit, carry out image display to drive described touch control display apparatus; According to the gray scale voltage being applied to each display unit, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit; According to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage; Drive described touch display unit to carry out touch sensible, revise according to the measured value of modifying factor to touch sensible that current display image obtains.Revised measured value substantially eliminates gray scale voltages different when picture shows to the impact of touch control unit Detection capacitance value, thus effectively improves the precision touching and detect.
Further, store the method for different gray scale voltage to the influence coefficient of touch control unit Detection capacitance value also to comprise: after the different gray scale voltage of acquisition is to the influence coefficient of touch control unit Detection capacitance value, generate the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage, store described look-up table.Like this according to being applied to the gray scale voltage of each display unit, when obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit, the influence coefficient of corresponding current gray voltage can be obtained easily from described look-up table.
Accompanying drawing explanation
Fig. 1 is the equivalent circuit diagram of a sub-pixel unit of display unit in a kind of touch control display apparatus;
Fig. 2 is the schematic diagram of multiple display unit in touch control display apparatus one embodiment of the present invention;
Fig. 3 is the schematic diagram of multiple touch control unit in touch control display apparatus one embodiment of the present invention;
Fig. 4 is the graph of a relation of driving circuit modules in touch control display apparatus one embodiment of the present invention;
Fig. 5 is the schematic diagram of its periphery display unit of touch control unit in Fig. 3;
Fig. 6 is the process flow diagram of the driving method of touch control display apparatus of the present invention.
Embodiment
When being integrated in LCDs by touch detecting electrode, the change applying the liquid crystal deflection that different gray scale voltage causes easily brings interference to touching detection.
The invention provides a kind of touch control display apparatus and driving method thereof and driving circuit.Described touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display; Driving circuit, and described driving circuit is connected with multiple display unit with described multiple touch control unit, and described driving circuit comprises: driver module, carries out touch sensible for driving described touch display unit; Display module, for applying gray scale voltage to each display unit, carries out image display to drive described touch control display apparatus; Analysis module, for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, and stores touch control unit and has the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value.According to the driving method of touch control display apparatus of the present invention, described analysis module is also applied to the gray scale voltage of each display unit for basis, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit, according to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and revise according to the measured value of modifying factor to the touch sensible that driver module obtains that current display image obtains.Revised measured value substantially eliminates gray scale voltages different when picture shows to the impact of touch control unit Detection capacitance value, thus effectively improves the precision touching and detect.
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail specific embodiments of the invention below in conjunction with accompanying drawing.
First the present invention provides a kind of touch control display apparatus.
Particularly, touch control display apparatus of the present invention is the touch control display apparatus using display panels as display section.The liquid crystal layer that described touch control display apparatus comprises first substrate, second substrate and is arranged between first substrate, second substrate, described display unit comprises and is arranged at pixel electrode on described first substrate and public electrode, and described touch control unit comprises the touch detecting electrode be arranged on described first substrate.
In the present embodiment, described first substrate, second substrate are transparent glass substrate, but the material of the present invention to first substrate, second substrate does not limit.
In the present embodiment, described touch control display apparatus comprises display and touches detection chip, and described display touches the display module of built-in described driving circuit in detection chip, driver module and analysis module, and described display touches detection chip binding on the first substrate.
Described first substrate is array base palte, is namely formed with the array of multiple display unit composition on the first substrate.Fig. 2 shows the schematic diagram of multiple display unit in touch control display apparatus one embodiment of the present invention.
With reference to figure 2, in the present embodiment, first substrate 100 is formed with multiple display unit, multiple display unit is array arrangement.Each display unit is formed primarily of thin film transistor (TFT) 101, pixel electrode 102 and public electrode 109.First substrate 100 is also formed a plurality of data lines 105, many gate lines 103, many public electrode wires (Vcom) 104, gate driver circuit 106, source electrode drive circuit 107, common electrode driving circuit 108.Described gate driver circuit 106, source electrode drive circuit 107, common electrode driving circuit 108 form the display module of touch control display apparatus driving circuit of the present invention.
It should be noted that, only illustrate the position of pixel electrode 102 and public electrode 109 with same rectangle at Fig. 2, in fact, in the present embodiment, in described touch control display apparatus, the display mode of display unit can be coplanar conversion (In-Plane-Switching, IPS) pattern or fringing field switch (FringeFieldSwitching, FFS) pattern, pixel electrode 102 and public electrode 109 coexist first substrate, pixel electrode 102 and public electrode 109 can be cross one another interdigitated or bar shaped, pixel electrode 102 and public electrode 109 form liquid crystal capacitance Clc, can through the liquid crystal molecule (LiquidCrystal) in liquid crystal layer with the transverse electric field produced between pixel electrode 102 and public electrode 109, the size of electric field can determine the size of the anglec of rotation of liquid crystal molecule, and the liquid crystal molecule anglec of rotation can determine by this sub-pixel light power in particular directions.
But the present invention does not limit the display mode of display unit in described touch control display apparatus, in other embodiments, in described touch control display apparatus, the display mode of display unit can also be twisted nematic (twistednematicliquidcrystalmode, TN) pattern, or vertical orientated (VerticalAlignment, VA) pattern etc., in above-mentioned display mode, public electrode is arranged on second substrate, and the shape of pixel electrode 102 and public electrode 109 is block.
Particularly, in the present embodiment, the method of display unit work is driven to be: source electrode drive circuit 107 provides electric signal for data line 105, the thin film transistor (TFT) source electrode (source) of every bar data line 105 to a row display unit applies gray scale voltage, one end of thin film transistor (TFT) steelyard slepsydra pole (drain) then connects pixel electrode 102, gate driver circuit 106 provides electric signal for many gate lines 103, the thin-film transistor gate of every bar gate line 103 pairs of a line display units applies scanning voltage, (i.e. gray scale voltage) is charged by data line 105 pairs of pixel electrodes 102 using thin film transistor (TFT) as on-off element, common electrode driving circuit 108 provides electric signal for public electrode wire (Vcom) 104, public electrode wire (Vcom) 104 is that the public electrode 109 of all display units applies fundamental voltage, different gray scale voltages makes the electric field level that formed between pixel electrode 102 from public electrode 109 different, liquid crystal capacitance Clc is also different.
It should be noted that, only to driving the method for display unit work to do simple explanation in the present embodiment, in the display unit of reality, drive the method for display unit work possibility different, but therefore should not limit the present invention, in the driving method of touch control display apparatus of the present invention, the method for other driving display unit work in prior art can be adopted to make display unit work.
It should be noted that, in the present embodiment, described touch control display apparatus is colour display device, and described second substrate is colored filter substrate, is namely formed with the color blocking of multiple Red Green Blue on the glass substrate.But the present invention is not restricted this, in other embodiments, described second substrate can also be flint glass substrate.
In the present embodiment, each display unit comprises three sub-pixel unit: red sub-pixel unit, green sub-pixels unit, blue subpixels unit, wherein each sub-pixel unit comprises independently thin film transistor (TFT), pixel electrode 102 and public electrode 109, region corresponding with each sub-pixel unit on second substrate has red respectively, green, the color blocking of primary colors, and each sub-pixel unit can independently drive, but the present invention is not restricted this, in other embodiments, as as described in touch control display apparatus be white and black displays device time, each described display unit only can also comprise a sub-pixel unit, when described touch control display apparatus is colour display device, each described display unit only can also comprise four sub-pixel unit, region corresponding with each sub-pixel unit on second substrate is respectively red, green, blue, the color blocking of Bai Sise, to increase the color saturation of touch control display apparatus.
Also it should be noted that, in other embodiments, when described touch control display apparatus is white and black displays device, described display unit only can also comprise a black and white sub-pixel unit.
Touch control display apparatus of the present invention also comprises multiple touch control unit, by detecting when finger touch touch control display apparatus, realizing touching and detecting.Particularly, the touch control unit of described touch control unit can be capacitance touch detecting pattern, in the present embodiment, carry out touch detect with the detecting pattern of self-capacitance, namely described touch control unit Detection capacitance value is the measured value of capacitance between the touch detecting electrode of described touch control unit and ground are held.But the present invention carries out touch to whether with the detecting pattern of self-capacitance to be detected and does not limit, and in other embodiments, can also carry out touchs detection with the detecting pattern of mutual capacitance.
In the present embodiment, public electrode 109 on described first substrate 100 is used as the touch detecting electrode of described touch control unit, like this when making touch control display apparatus, the step being formed separately and touch detecting electrode can be saved, improve the transmittance of touch control display apparatus and reduce production cost, therefore, in the present embodiment, described touch control unit Detection capacitance value is capacitance Cs between public electrode 109 and the earth.
But whether the present invention, to not limited by the touch detecting electrode that the public electrode 109 on described first substrate 100 is used as described touch control unit, in other embodiments, can also be formed and independently touch detecting electrode on first substrate 100 or second substrate.
As shown in Figure 3, the schematic diagram that public electrode is used as touch detecting electrode one embodiment of touch control unit is shown.In conjunction with reference to figure 2, Fig. 3, the public electrode 109 of whole touch control display apparatus is divided into the square electrode of the capable N row of M, each square electrode comprises the public electrode 109 in multiple display unit.Each square electrode is as a touch control unit 201, and be connected to by wire and touch driving circuit 202, described touch driving circuit 202 is the driver module of the driving circuit of touch control display apparatus of the present invention.
In other embodiments, described touch control unit 201 can also be formed by independently touching detecting electrode, also can by independently emitting electrode and detecting electrode form under mutual capacitance detecting pattern.
It should be noted that, in the present embodiment, in order to avoid liquid crystal display to touching the interference detected on controlling, needing to do time-sharing multiplex to public electrode 109.Namely public electrode 109 is urged to the current potential needed for display in refreshing stage of display unit, then the touch detecting electrode of public electrode 109 as touch control unit is gone to drive at touch detection-phase, concrete control method is this area conventional techniques, does not repeat here.
As stated in the Background Art, when public electrode 109 is used as the touch detecting electrode of self-capacitance detecting pattern, when applying different gray scale voltages between pixel electrode 102 from public electrode 109, liquid crystal deflection under different gray scale voltage causes the change of liquid crystal capacitance Clc, can cause electric capacity Cs is changed, thus bring interference to touch detection.In some other detecting pattern, the change of liquid crystal capacitance Clc can bring interference to touch detection equally.Such as when public electrode 109 is used as the emitting electrode of mutual capacitance detecting pattern, the change of liquid crystal capacitance Clc can cause the electric capacity accepted between electrode of public electrode 109 and mutual capacitance detecting pattern to change.
Not only when public electrode 109 is used as to touch detecting electrode, liquid crystal deflection under different gray scale voltage brings interference can to touch detection, when adopt formed on first substrate 100 or second substrate independently touch the emitting electrode of detecting electrode as the detecting electrode of self-capacitance or mutual capacitance time, independently touch detecting electrode (detecting electrode in mutual capacitance or emitting electrode) can be formed by liquid crystal as dielectric dynamic capacity with pixel electrode 102 or public electrode 109 etc., described dynamic capacity also can change with the change of the liquid crystal deflection under different gray scale voltage, owing to touching the common electrode plate of the electric capacity that detecting electrode detects for described dynamic capacity and self-capacitance or mutual capacitance, the measured value that the change of described dynamic capacity also can cause self-capacitance or mutual capacitance to detect institute's Detection capacitance changes, thus bring interference also can to touch detection.
In order to reduce described interference, the driving circuit of touch control display apparatus of the present invention can be revised the touch control unit Detection capacitance value that touch control unit 201 feeds back, thus improves the precision touching and detect.
Particularly, with reference to figure 4, show the graph of a relation of modules in the driving circuit of touch control display apparatus of the present invention.
Driver module 402, carries out touch sensible for driving described touch display unit.
Display module 401, for applying gray scale voltage to each display unit, carries out image display to drive described touch control display apparatus.
Analysis module 403, for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, and store there is from touch control unit different relative position relation display unit to the weighing factor of touch control unit Detection capacitance value.
Described analysis module 403 can transmit according to receiving display module 401 the current gray scale voltage being applied to each display unit of coming, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit, according to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and according to the modifying factor that current display image obtains, the measured value transmitting the touch sensible come to driver module 402 is revised, and obtains more accurate touch control unit Detection capacitance value.
Particularly, in the present embodiment, described analysis module 403 comprises:
First memory module 404A, described first memory module 404A are for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
Second memory module 404B, described second memory module 404B stores has the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from there being touch control unit.
Correcting module 405, described correcting module 405 and described driver module 402, display module 401, first memory module 404A is connected with the second memory module 404B, for being applied to the gray scale voltage of each display unit according to display module 401, gray scale voltage is obtained to the influence coefficient of touch control unit Detection capacitance value from described first memory module 404A, and obtain the weighing factor of each display unit to touch control unit Detection capacitance value from described second memory module 404B, according to obtained influence coefficient and weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and according to the modifying factor that current display image obtains, the Detection capacitance value that driver module 402 obtains is revised.
But whether the present invention is divided into the first memory module 404A, the second memory module 404B and correcting module 405 not to limit to described analysis module 403, in other embodiments, the module that described analysis module 403 can also be as a whole.
In the present embodiment, in described first memory module 404A, the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage is stored.Such as when each described display unit loading 256 different gray scale voltages, described look-up table can be expressed as table [0 ~ 255].
Before storage comprises the look-up table of each gray scale voltage and the influence coefficient corresponding with described gray scale voltage, need to obtain the influence coefficient corresponding with gray scale voltage.In conjunction with the schematic diagram with reference to figure 3, Fig. 5, Fig. 5 being a touch control unit 201 and periphery display unit 301 thereof in Fig. 3.It should be noted that, in the present embodiment, the touch detecting electrode of touch control unit 201 is the public electrode of multiple display units 301 that touch control unit 201 region comprises, touch control unit 201 position also comprises multiple unshowned display unit 301 in Figure 5, similarly, illustrate only multiple touch control unit 201 in figure 3, first substrate 100 also comprises multiple unshowned display unit 301.
In the present embodiment, the influence coefficient corresponding with gray scale voltage can be obtained by experiment:
Apply gray scale voltage frame by frame to all display units 301 of touch control display apparatus, wherein, for same frame, apply same gray scale voltage to all display units 301, for different frame, apply different gray scale voltages to all display units 301.
Apply gray scale voltage in the step of all display units 301 at every frame, all detect the Detection capacitance value being positioned at the touch control unit 201 of touch control display apparatus center, to obtain the touch control unit Detection capacitance value corresponding from different gray scale voltage.
It should be noted that, in the present embodiment, gate driver circuit 106 applies scanning voltage to the thin-film transistor gate of display unit 301 line by line, namely opens the thin film transistor (TFT) of a line at every turn, makes the display unit 301 of a line load gray scale voltage.So line by line in touch control display apparatus often row display unit 301 all complete applying gray scale voltage, make touch control display apparatus can show the step of a complete picture, be commonly referred to as a frame.Apply gray scale voltage frame by frame to all display units 301 of touch control display apparatus, refer to the display making touch control display apparatus carry out multiframe picture.For same frame, apply same gray scale voltage to all display units 301, refer in each frame picture, the gray scale voltage that all display units 301 apply is identical.For different frame, apply different gray scale voltages to all display units 301, refer in different frame picture, the gray scale voltage being applied to display unit 301 is different.
It should be noted that, in the present embodiment, each described display unit 301 comprises three sub-pixel unit, and when all display units 301 apply same gray scale voltage, three sub-pixel unit of each described display unit 301 apply same gray scale voltage.
After obtaining the touch control unit Detection capacitance value corresponding from different gray scale voltage, using touch control unit Detection capacitance value corresponding to a preset gray scale voltage as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtains the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
Such as, in the picture of different frame, each described display unit 301 loads multiple when arriving large different gray scale voltage from childhood, the touch control unit Detection capacitance value that multiple gray scale voltage is corresponding can be measured respectively, using wherein maximum touch control unit Detection capacitance value as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtain the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, the maximal value of the influence coefficient of such acquisition is 1, is convenient to calculate.But whether the present invention is to not limiting using maximum touch control unit Detection capacitance value as reference capacitance value.
It should be noted that, influence coefficient only reflects the impact of different gray scale voltage on touch control unit Detection capacitance value, but in the process obtaining influence coefficient, different from the impact of display unit 301 on touch control unit Detection capacitance value that touch control unit 201 has diverse location relation, in order to the interference that the display unit 301 reducing diverse location causes acquisition influence coefficient, in the present embodiment, carrying out obtaining in the experiment of the influence coefficient corresponding with gray scale voltage, under each frame picture, identical gray scale voltage is applied to all display units 301 ground of touch control display apparatus, under different frame picture, different gray scale voltages is applied to display unit 301.Such as each display unit 301 can apply from GTG [0] to GTG [255] totally 256 gray scale voltages, when the gray scale voltage needing to detect is GTG [0], touch control display apparatus is made to carry out the display of the first frame picture, in the first frame picture, make all display units 301 all apply the gray scale voltage of GTG [0], and detect the touch control unit Detection capacitance value being now positioned at the touch control unit 201 of touch control display apparatus center.When namely supposing that touch control display apparatus comprises the touch control unit 201 of 9 row 9 row, the touch control unit Detection capacitance value of touch control unit 201 under the gray scale voltage of GTG [0] being positioned at touch control display apparatus the 5th row the 5th row can be detected.Because the size of touch control unit 201 is much smaller than the size of touch control display apparatus, and the gray scale voltage of all display units 301 is GTG [0], can think that the touch control unit Detection capacitance value now detected is only relevant with GTG [0], thus make the influence coefficient of acquisition only reflect the impact of different gray scale voltage on touch control unit Detection capacitance value.When the gray scale voltage needing to detect is GTG [1], touch control display apparatus is made to carry out the display of the second frame picture, in the second frame picture, all display units 301 are made all to apply the gray scale voltage of GTG [1], and detect the touch control unit Detection capacitance value being now positioned at the touch control unit 201 of touch control display apparatus center ... with said method, until obtain the touch control unit Detection capacitance value corresponding to 256 gray scale voltages.
It should be noted that, because the size of touch control unit 201 is much smaller than the size of touch control display apparatus, under each frame picture, when identical gray scale voltage is applied to all display units 301 of touch control display apparatus, substantially identical in multiple touch control unit Detection capacitance values of touch control display apparatus near central regions, touch control unit near touch control display apparatus fringe region 201 be also more or less the same in the touch control unit Detection capacitance value of the touch control unit 201 of touch control display apparatus near central regions, therefore the present invention is to when applying all display unit 301 of gray scale voltage to touch control display apparatus frame by frame, the touch control unit Detection capacitance value that detection is positioned at touch control display apparatus center touch control unit 201 does not limit, in other embodiments, the touch control unit Detection capacitance value being positioned at other position touch control units 201 of touch control display apparatus can also be detected.
Described second memory module 404B is for storing the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values from touch control unit 201 with different relative position relation.
Before storage has the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values of different relative position relation from touch control unit 201 in described second memory module 404B, need to obtain by experiment the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values from each touch control unit 201 with different relative position relation.
Described weighing factor only reflects the Different Effects that display unit 301 causes touch control unit Detection capacitance value owing to having different position relationships from touch control unit 201.Continue with reference to figure 5, in the present embodiment, obtain the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values from touch control unit 201 with different relative position relation by experiment:
In the present embodiment, using one of them touch control unit 201 of touch control display apparatus as experiment touch control unit.Be positioned at the display unit 301 at touch control unit 201 center as center display unit 501.
It should be noted that, illustrate only 81 display units 301 centered by center display unit 501 in Figure 5, described touch control display apparatus also comprises the multiple display units except the display unit 301 shown in Fig. 5.Touch control unit 201 position comprises 25 display units 301 in Figure 5, but the present invention does not limit touch control unit 201 to comprise display unit 301 quantity in position, in other embodiments, touch control unit 201 position can comprise the display unit 301 of any amount.
In the present embodiment, the shape of described touch control unit 201 is rectangle, but the shape of the present invention to touch control unit 201 does not limit, and in other embodiments, the shape of described touch control unit 201 can also be circular or other shapes.It should be noted that, the shape of described touch control unit 201 is rectangle or circle, and the shape approximation referring to touch control unit 201, in rectangle or circle, might not be restricted to accurate rectangle or circle.Such as, the shape of described touch control unit 201 figure being similar to rectangle that can form for the public electrode of multiple strip.
According to the experiment measuring the corresponding influence coefficient of different gray scale voltage, record the first gray scale voltage, the influence coefficient that described first gray scale voltage is corresponding is maximum, records the second gray scale voltage, and the influence coefficient that described second gray scale voltage is corresponding is minimum.
Region dividing is carried out to array of display cells, using the central point of touch control unit 201 as inspection center, choose described inspection center just to the display unit 301 of position as center display unit 501, centered by described center display unit 501, delimit the first reference zone comprising one or more display unit 301, first gray scale voltage is applied to the display unit 301 in described first reference zone, second gray scale voltage is applied to all the other display units 301 outside the first reference zone, touch control capacitance detection is carried out to touch control unit 201, to obtain the touch control unit Detection capacitance value that will now measure, and as the first Detection capacitance value.
Centered by described center display unit 501, delimit the second reference zone comprising multiple display unit 301, the second reference zone is made to comprise described first reference zone, the quantity of the display unit 301 in described second reference zone is greater than the quantity of the display unit 301 in the first reference zone, first gray scale voltage is applied to the display unit 301 in described second reference zone, second gray scale voltage is applied to all the other display units 301 outside the second reference zone, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value.
Bring the first Detection capacitance value and the second Detection capacitance value into weight equation, the weighing factor using the numerical value obtained as the multiple display units 301 within the second reference zone and outside the first reference zone.
In order to make the weighing factor of acquisition react the impact of different position of display unit on touch control unit Detection capacitance value better, make the shape of the first reference zone of delimitation, the shape of the second reference zone and touch control unit 201 close.In the present embodiment, first reference zone, the second reference zone are centered by described center display unit 501, comprise the referential array of multiple display unit 301, line number and the columns of referential array are equal, but the present invention does not limit whether the line number of referential array is equal with columns, does not also limit the shape of reference zone.
In the present embodiment, for obtaining all weighing factors touch control unit Detection capacitance value to the display unit 301 of comparatively obviously impact, need repeatedly to delimit the first reference zone and the second reference zone, obtain the step of the first Detection capacitance value and the second Detection capacitance value, wherein each second reference zone of delimiting is as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, with after each delimitation the first reference zone and the second reference zone, obtain the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
Particularly, scope first using center display unit 501 as the first initial reference zone, the area of center display unit 501 is the initial value of the first reference zone area, line number and the columns of namely initial referential array are 1, first gray scale voltage is applied to center display unit 501, second gray scale voltage is applied to all the other display units 301 outside center display unit 501, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the first Detection capacitance value.The area of records center display unit 501, as the first parameter.
Centered by described center display unit 501, delimit the second reference zone comprising multiple display unit 301, make the second reference zone comprise described first reference zone, the quantity of the display unit in described second reference zone is greater than the quantity of the display unit in the first reference zone.Particularly, make described second reference zone for centered by center display unit 501, comprise the first referential array 502 of 9 display units 301, line number and the columns of described first referential array 502 are 3, and the first referential array 502 comprises center display unit 501 and surrounds 8 display units 301 of center display unit 501.Record the area of the first referential array 502, as the second parameter.
First gray scale voltage is applied to the display unit 301 in the first referential array 502, second gray scale voltage is applied to all the other display units 301 outside the first referential array 502, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value.
Second gray scale voltage is applied to all display units 301 of touch control display apparatus, using the touch control unit Detection capacitance value now measured as tri-consult volume.
First gray scale voltage is applied to all display units 301 of touch control display apparatus, using the touch control unit Detection capacitance value now measured as the 4th parameter.
Bring described first parameter, the second parameter, tri-consult volume, the 4th parameter, the first Detection capacitance value and the second Detection capacitance value into weight equation in the lump, to obtain the weighing factor of 8 display units 301 within the second reference zone and outside the first reference zone.
It should be noted that, in the present embodiment, for convenience of calculating, the weighing factor of different display unit 301 can be made all to be less than or equal to 1.Due to center display unit 501 position having the greatest impact to the touch control detection capacitance of touch control unit 201, therefore, in the present embodiment, the weighing factor of default center display unit 501 is 1.But the weighing factor of center display unit 501, to whether the weighing factor of center display unit 501 being set as that 1 does not limit, can also be set as other numerical value by the present invention.
In the present embodiment, described weight equation is:
y＝(C2-C1)/[(Cmax-Cmin)*(area2-area1)]。
Wherein, y weighing factor, C2 is the second Detection capacitance value, and C1 is the first Detection capacitance value, and Cmax is the 4th parameter, and Cmin is tri-consult volume, and area2 is the second parameter, and area1 is the first parameter.
It should be noted that, according to the weight equation in the present embodiment, the weighing factor obtained and the first Detection capacitance value, the second Detection capacitance value is correlated with; Also with the difference correlation of the area of the first reference zone and the second reference zone, the weighing factor therefore obtained according to the weight equation of the present embodiment can comparatively accurately react there is with touch control unit 201 diverse location relation display unit 301 on the impact of touch control unit Detection capacitance value.But the concrete form of the present invention to weight equation does not limit, in other embodiments, weight equation only can also comprise the first Detection capacitance value and the second Detection capacitance value two parameters, or comprise the first Detection capacitance value, second Detection capacitance value, tri-consult volume, the 4th parameter is totally four parameters.Any change to weight equation concrete form is all within scope.
Because the shape of reference zone is close with the shape of touch control unit 201, in the present embodiment, therefore can think that the weighing factor of multiple display unit 301 is all identical within the second reference zone and outside the first reference zone.
In the present embodiment, in the above described manner, repeatedly delimit the first reference zone and the second reference zone, and obtain the step of the first Detection capacitance value and the second Detection capacitance value, wherein each second reference zone of delimiting is as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, after obtaining each delimitation the first reference zone and the second reference zone, the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
Such as in the present embodiment, delimitation center display unit 501 be the first reference zone, first referential array 502 carries out delimitation first reference zone and the second reference zone after being the second reference zone again, and obtains the step of the first Detection capacitance value and the second Detection capacitance value.Delimiting in the step of the first reference zone and the second reference zone at this, is the first reference zone with the first referential array 502, is the second reference zone with the second referential array 503.Described second referential array 503, centered by center display unit 501, comprises the first referential array 502 and surrounds 16 display units 301 of the first referential array 502.Record the area of the first referential array 502, as the first parameter, record the area of the second referential array 503, as the second parameter.The the first Detection capacitance value obtained after this being delimited the first reference zone and the second reference zone, the second Detection capacitance value, the first parameter, the second parameter and tri-consult volume, the 4th parameter bring weight equation in the lump into, obtain the weighing factor of 16 display units 301 within the second reference zone and outside the first reference zone.
It should be noted that, in the present embodiment, the first reference zone and the second reference zone are referential array, and compared with the first reference zone, line number and the columns of the referential array of the second reference zone all increase by 2.
It should be noted that, the scope of the present invention to the first initial reference zone does not limit, in other embodiments, and can also using the first referential array 502 and even larger referential array as the first initial reference zone.The present invention is pair compared with the first reference zone, the quantity that the line number of the referential array of the second reference zone and columns increase also does not limit, in other embodiments, compared with the first reference zone, the line number of the referential array of the second reference zone and the increase number of columns can also be the numerical value of the integral multiple of 2.
Also it should be noted that, in other embodiments, when the shape of described touch control unit 201 is circular, described first reference zone, the second reference zone can be centered by described center display unit 501, comprise the display unit set of multiple display unit 301.The outermost multiple display unit 301 of described display unit set is equal to the distance of center display unit 501.Like this, the shape of display unit set is also similar to circle.The radius of the second reference zone is greater than the radius of the first reference zone.
Also it should be noted that, in the present embodiment, each display unit 301 comprises three sub-pixel unit, and when carrying out the experiment obtaining weighing factor, the gray scale voltage that three sub-pixel unit of each display unit 301 apply is identical.
Because the weighing factor of the display unit 301 far away apart from the inspection center of experiment touch control unit is less, when revising touch control unit Detection capacitance value, weighing factor less is like this negligible.Therefore, in the present embodiment, when carrying out the experiment obtaining weighing factor, can comprise the sample area of multiple display unit 301 setting up, the weighing factor of display unit to touch control unit being positioned at described sample area is more than or equal to and is positioned at the weighing factor of the display unit outside described sample area to touch control unit.After the weighing factor obtaining display unit 301 in sample area, ignore all the other display units 301 to the impact of touch control detection capacitance, in the second memory module 404B, store display unit 301 in the described sample area weighing factor to experiment touch control unit.
Particularly, the step setting up sample area can be carried out with the experimental synchronous obtaining weighing factor:
Initial value using the area of center display unit 501 as the first reference zone area, repeatedly delimit the step of the first reference zone and the second reference zone, and wherein each second reference zone of delimiting is as first reference zone of delimiting next time;
Using the area of first reference zone of delimiting at every turn as the first parameter;
Using the area of second reference zone of delimiting at every turn as the second parameter;
Each delimit the first reference zone and the second reference zone after, obtain the first Detection capacitance value to the second Detection capacitance value, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter;
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtains the 7th parameter;
When the 5th parameter is less than or equal to the 7th parameter, using reference zone now as sample area.
Particularly, continue with reference to figure 5, be the first reference zone to delimit the second referential array 503,3rd referential array 504 is the second reference zone is example, described 3rd referential array 504, centered by center display unit 501, comprises described second referential array 503 and surrounds 24 display units 301 of described second referential array 503.
Using the area of the second referential array 503 as the first parameter, using the area of the 3rd referential array 504 as the second parameter.
Be the first reference zone at delimitation second referential array 503, after the 3rd referential array 504 is the second reference zone, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter.
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtain the 7th parameter, this predetermined coefficient can in the scope of 0.01 to 0.4, like this 5th parameter and the 7th parameter are compared, can reflect more accurately and again delimit the first reference zone and the second reference zone at every turn, and using the last time delimit the second reference zone as first reference zone of delimiting next time time, relation between the variable quantity of touch control unit Detection capacitance value and the second reference zone area change amount, but the concrete numerical value of the present invention to predetermined coefficient does not limit.
When the 5th parameter is less than or equal to the 7th parameter, using the second current reference zone as sample area, namely sample area is the 3rd referential array 504 comprising 49 display units.Outside the scope of sample area, along with the increase of referential array area, the touch control detection capacitance variation measured after at every turn again delimiting the first reference zone and the second reference zone is very little, the 301 pairs of touch control detection capacitances of display unit outside the scope of sample area can be ignored as noise.
It should be noted that, in the present embodiment, using the 3rd referential array 504 as sample area, but the scope included by sample area is determined with actual conditions.In general, need repeatedly to delimit the first reference zone and the second reference zone, and the step that second reference zone of being delimited the last time delimited as first reference zone of delimiting next time, to determine the scope of sample area.
Also it should be noted that, in other embodiments, when the 5th parameter is less than or equal to the 7th parameter, can also using the first reference zone as sample area, namely sample area is the second referential array 503.
For other touch control units 201 except above-mentioned experiment touch control unit in touch control display apparatus, with said method, each touch control unit 201 can be tested, obtain weighing factor and the sample area of each touch control unit 201 correspondence.For generalized case, simply, can also record in above-mentioned experiment, the weighing factor of each display unit 301 in the experiment sample area of touch control unit and sample area, other touch control units 201 can set up sample area of the same area with the sample area of testing touch control unit, and the weighing factor of each display unit 301 in the sample area of experiment touch control unit is extrapolated in other touch control units, to obtain the weighing factor of a display unit 301 in the sample area of other touch control units 201 and sample area.
It should be noted that, under normal circumstances, the size of the sample area of multiple touch control unit 201 is identical, but at the boundary of touch control display apparatus, due to the restriction on border, the sample area area of boundary touch control unit 201 may be less than the sample area area of the touch control unit 201 of touch control display apparatus middle part.Can adjust accordingly sample area as the case may be; such as in the maximum area that touch control display apparatus boundary can reach using the reference zone suitable with touch control unit 201 size as sample area, be similar to this trickle adjustment all within scope.
In acquisition touch control display apparatus, in the sample area of each touch control unit 201 correspondence and sample area a display unit 301 weighing factor after, in the second memory module 404B, store the weighing factor of a display unit 301 in the sample area of each touch control unit 201 correspondence and sample area.
By the analysis module 403 in touch control display apparatus of the present invention, the modifying factor that can obtain according to current display image is revised touch control unit Detection capacitance value.
Described analysis module 403 can transmit according to receiving display module 401 the current gray scale voltage being applied to each display unit 301 of coming, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit 301, according to obtained influence coefficient and with stored weighing factor, the modifying factor that the touch control unit Detection capacitance value obtaining each touch control unit 201 affects by described gray scale voltage, and according to the modifying factor that current display image obtains, the touch control unit Detection capacitance value that touch control unit 201 feeds back is revised.
Particularly, in the present embodiment, it is as follows that touch control display apparatus carries out touching the course of work detected:
Continue with reference to figure 5, display module 401 applies gray scale voltage to each display unit 301, carries out image display to drive described touch control display apparatus.In the present embodiment, using public electrode 109 as the touch detecting electrode of self-capacitance detecting pattern, need to do time-sharing multiplex to public electrode 109, when touch control display apparatus carries out image display, complete in a two field picture display, before the display of another two field picture, the gray scale voltage being applied to each display unit 301 is transferred to the correcting module 405 in described analysis module 403 by described display module 401, described correcting module 405 is according to the gray scale voltage being applied to each display unit 301, call the look-up table be stored in the first memory module 404A, thus obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 of each display unit 301, and the influence coefficient of current for each display unit 301 touch control unit Detection capacitance value to touch control unit 201 is formed the first matrix.
Described correcting module 405 can obtain the weighing factor of the display unit 301 pairs of touch control units 201 in the described sample area corresponding with described touch control unit 201 from described second memory module 404B, forms the second matrix.
In described correcting module 405, each influence coefficient in described first matrix is multiplied with the weighing factor of influence coefficient co-located with the second matrix, obtain the 3rd matrix be made up of multiple correction factor, in described 3rd matrix, numerical value sum is as modifying factor.
Described driver module 402 is worked, described touch display unit is driven to carry out touch sensible, revise according to the measured value of modifying factor to touch sensible that current display image obtains, in the present embodiment, namely the measured value of described touch sensible detects the touch control unit Detection capacitance value obtained on each touch control unit 201.
Particularly, in the present embodiment, when driver module 402 drives described touch display unit to carry out touch sensible, bring modifying factor corresponding with each touch control unit 201 for the measured value of the touch control unit Detection capacitance value of each touch control unit 201 into electric capacity as parameter and repair equation, obtain capacitance after the correction of each touch control unit 201, to revise the touch control unit Detection capacitance value of rear capacitance as reality.
After revising, capacitance eliminates liquid crystal deflection that different gray scale voltages causes to the impact of the measured value of touch control unit Detection capacitance value, the change of touch control unit Detection capacitance value when can reflect finger touch more realistically, thus improves the precision touching and detect.
It should be noted that, whether the present invention, to complete in a two field picture display when carrying out image display at touch control display apparatus, carry out touch detection and does not limit before the display of another two field picture.In other embodiments, image display and touch detection can also be carried out simultaneously.
Such as, in other embodiments, described touch control display apparatus comprises the first viewing area and the second viewing area, and the first viewing area and the second viewing area comprise multiple display unit 301 respectively, and the multiple touch control units 201 corresponding with multiple display unit 301.
Display module 401 applies gray scale voltage to each display unit 301, comprise with the step driving described touch control display apparatus to carry out image display: in the first viewing area each display unit 301 charge complete carry out image display time, apply each display unit 301 of gray scale voltage to the second viewing area, carry out image display to drive the second viewing area.
Now in the first viewing area, the gray scale voltage of display unit 301 is stablized, can according to the gray scale voltage being applied to each display unit 301 in the first viewing area, obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 each in the first viewing area of each display unit 301 in the first viewing area, and carry out touch detection further by driver module 402, and touch control unit Detection capacitance value after obtaining correction.Can carry out the image display of the touch detection of the touch control unit 201 of the first viewing area and each display unit 301 of the second viewing area so simultaneously.It should be noted that, when in the first viewing area, the gray scale voltage of display unit 301 is stablized, can in the image display process of each display unit 301 of the second viewing area, or in the first viewing area each display unit 301 image of the display of each display unit 301 image and the second viewing area show between time in, obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 each in the first viewing area of each display unit 301 in the first viewing area.
It should be noted that, in the present embodiment, each described display unit 301 comprises three sub-pixel unit: red sub-pixel unit, green sub-pixels unit, blue subpixels unit.Due to the very tiny and close-packed arrays of three sub-pixel unit, can think the identical to touch control unit 201 weighing factor of three sub-pixel unit, red sub-pixel unit, green sub-pixels unit, influence coefficient that blue subpixels unit is corresponding can be obtained respectively, the influence coefficient using the mean value of three sub-pixel unit influence coefficients as display unit 301 pairs of touch control unit Detection capacitance values by look-up table.Suppose that the gray scale voltage of three sub-pixel unit is respectively GTG [R], GTG [G], GTG [B], each display unit 301 is (table [R]+table [G]+table [B])/3 by the influence coefficient that look-up table obtains.
In other embodiments, the influence coefficient of each sub-pixel unit in sample area can also be obtained respectively, form the 4th matrix, the weighing factor of each sub-pixel unit in store sample region in a storage module, form the 5th matrix, be multiplied with the weighing factor of influence coefficient co-located with the 5th matrix by each influence coefficient in described 4th matrix, obtain the 6th matrix be made up of multiple correction factor, in described 6th matrix, numerical value sum is as modifying factor.The correction factor that described 6th matrix comprises is be three times of the correction factor that the 3rd matrix comprises, and the modifying factor calculated is more accurate compared with the modifying factor in the 3rd matrix, but required calculated amount is larger.
It should be noted that, due in the present embodiment, described touch control display apparatus comprises and is bundled in display on first substrate 100 and touches detection chip (not shown), and described display touches the display module 401 of built-in described driving circuit in detection chip, driver module 402 and analysis module 403.Display module 401, between driver module 402 and analysis module 403 can by display touch detection chip control, touch detection chip by display exchange easily and transmit the information such as influence coefficient, weighing factor, gray scale voltage, but whether the present invention is integrated in a display to display module 401, driver module 402 and analysis module 403 touches in detection chip and does not limit.In other embodiments, described touch control display apparatus can also comprise display driver chip and touch detection chip, the display module 401 of built-in described driving circuit in described display driver chip, the driver module 402 of built-in described driving circuit and analysis module 403 in described touch detection chip, described display driver chip and touch detection chip and be all bundled on first substrate 100.In the above-described embodiments, because display module 401 and driver module 402, analysis module 403 lay respectively on two chips, therefore need other process chip (as central processing unit) to as described in display driver chip and touch detection chip and control, make can exchange and transmit the information such as influence coefficient, weighing factor, gray scale voltage between display module 401 and driver module 402, analysis module 403.
The present invention also provides a kind of driving circuit of touch control display apparatus, this touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display, and described touch control display apparatus includes but not limited to the touch control display apparatus that the invention described above provides.By detecting when finger touch touch control display apparatus, the touch control unit Detection capacitance value change of touch control unit, realizes touching and detects.
Can continue with reference to figure 4, described driving circuit comprises:
Driver module 402, carries out touch sensible for driving described touch display unit.
Display module 401, for applying gray scale voltage to each display unit 301, carries out image display to drive described touch control display apparatus.
Analysis module 403, described analysis module 403 stores the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, and stores the weighing factor that touch control unit has display unit 301 pairs of touch control unit Detection capacitance values of different relative position relation.
Described analysis module 403 can transmit according to receiving display module 401 the current gray scale voltage being applied to each display unit of coming, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit, according to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and according to the modifying factor that current display image obtains, the measured value transmitting the touch sensible come to driver module 402 is revised, and obtains more accurate touch control unit Detection capacitance value.
The change of revised touch control unit Detection capacitance value is enable accurately to react the touch of finger to touch control display apparatus.
Can continue with reference to figure 3 to Fig. 5, described touch control display apparatus is the touch control display apparatus using display panels as display section.The liquid crystal layer that described touch control display apparatus comprises first substrate 100, second substrate (not shown) and is arranged between first substrate 100, second substrate, described display unit 301 is arranged on described first substrate 100 or second substrate, and described touch control unit 201 is arranged on described first substrate 100 or second substrate.The touch detecting pattern of the present invention to described touch control unit 201 does not limit, and described touch control unit 201 can carry out touch detection with the pattern of self-capacitance or mutual capacitance.Each touch control unit 201 region can comprise multiple display unit 301.
As described in touch control display apparatus embodiment provided by the invention, be applied to the liquid crystal deflection difference that the different gray scale voltages on display unit 301 cause, the touch control unit Detection capacitance value of described touch control unit 201 can be affected.
By the analysis module 403 in driving circuit provided by the invention, touch control unit Detection capacitance value can be revised, obtain not by the touch control unit Detection capacitance value of gray scale voltage interference, and then improve the precision of touch control display apparatus.
Particularly, in the present embodiment, described analysis module 403 comprises:
First memory module 404A, described first memory module 404A are for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
Second memory module 404B, described second memory module 404B stores has the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from there being touch control unit.
Correcting module 405, described correcting module 405 and described driver module 402, display module 401, first memory module 404A is connected with the second memory module 404B, for being applied to the gray scale voltage of each display unit according to display module 401, gray scale voltage is obtained to the influence coefficient of touch control unit Detection capacitance value from described first memory module 404A, and obtain the weighing factor of each display unit to touch control unit Detection capacitance value from described second memory module 404B, according to obtained influence coefficient and weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and according to the modifying factor that current display image obtains, the Detection capacitance value that driver module obtains is revised.
In the present embodiment, in described first memory module 404A, the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage is stored.Such as when each described display unit loading 256 different gray scale voltages, described look-up table can be expressed as table [0 ~ 255].
Before storage comprises the look-up table of each gray scale voltage and the influence coefficient corresponding with described gray scale voltage, need to obtain the influence coefficient corresponding with gray scale voltage.In conjunction with the schematic diagram with reference to figure 3, Fig. 5, Fig. 5 being a touch control unit 201 and periphery display unit 301 thereof in Fig. 3.In the present embodiment, the influence coefficient corresponding with gray scale voltage is obtained by experiment:
Apply gray scale voltage frame by frame to all display units 301 of touch control display apparatus, wherein, for same frame, apply same gray scale voltage to all display units 301, for different frame, apply different gray scale voltages to all display units 301.
Apply gray scale voltage in the step of all display units 301 at every frame, all detect the Detection capacitance value being positioned at the touch control unit 201 of touch control display apparatus center, to obtain the touch control unit Detection capacitance value corresponding from different gray scale voltage.
It should be noted that, in the present embodiment, the mode of touch control display apparatus display frame is: make display unit 301 load gray scale voltage line by line.So line by line in touch control display apparatus often row display unit 301 all complete applying gray scale voltage, make touch control display apparatus can show the step of a complete picture, be commonly referred to as a frame.Apply gray scale voltage frame by frame to all display units 301 of touch control display apparatus, refer to the display making touch control display apparatus carry out multiframe picture.For same frame, apply same gray scale voltage to all display units 301, refer in each frame picture, the gray scale voltage that all display units 301 apply is identical.For different frame, apply different gray scale voltages to all display units 301, refer in different frame picture, the gray scale voltage being applied to display unit 301 is different.
It should be noted that, in the present embodiment, each described display unit 301 comprises three sub-pixel unit, and when all display units 301 apply same gray scale voltage, three sub-pixel unit of each described display unit 301 apply same gray scale voltage.
After obtaining the touch control unit Detection capacitance value corresponding from different gray scale voltage, using touch control unit Detection capacitance value corresponding to a preset gray scale voltage as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtains the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
Such as, in the picture of different frame, each described display unit 301 loads multiple when arriving large different gray scale voltage from childhood, the touch control unit Detection capacitance value that multiple gray scale voltage is corresponding can be measured respectively, using wherein maximum touch control unit Detection capacitance value as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtain the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, the maximal value of the influence coefficient of such acquisition is 1, is convenient to calculate.But whether the present invention is to not limiting using maximum touch control unit Detection capacitance value as reference capacitance value.
It should be noted that, influence coefficient only reflects the impact of different gray scale voltage on touch control unit Detection capacitance value, but in the process obtaining influence coefficient, different from the impact of display unit 301 on touch control unit Detection capacitance value that touch control unit 201 has diverse location relation, in order to the interference that the display unit 301 reducing diverse location causes acquisition influence coefficient, in the present embodiment, carrying out obtaining in the experiment of the influence coefficient corresponding with gray scale voltage, under each frame picture, identical gray scale voltage is applied to all display units 301 ground of touch control display apparatus, under different frame picture, different gray scale voltages is applied to display unit 301.Such as each display unit 301 can apply from GTG [0] to GTG [255] totally 256 gray scale voltages, when the gray scale voltage needing to detect is GTG [0], touch control display apparatus is made to carry out the display of the first frame picture, in the first frame picture, make all display units 301 all apply the gray scale voltage of GTG [0], and detect the touch control unit Detection capacitance value being now positioned at the touch control unit 201 of touch control display apparatus center.When namely supposing that touch control display apparatus comprises the touch control unit 201 of 9 row 9 row, the touch control unit Detection capacitance value of touch control unit 201 under the gray scale voltage of GTG [0] being positioned at touch control display apparatus the 5th row the 5th row can be detected.Because the size of touch control unit 201 is much smaller than the size of touch control display apparatus, and the gray scale voltage of all display units 301 is GTG [0], can think that the touch control unit Detection capacitance value now detected is only relevant with GTG [0], thus make the influence coefficient of acquisition only reflect the impact of different gray scale voltage on touch control unit Detection capacitance value.When the gray scale voltage needing to detect is GTG [1], touch control display apparatus is made to carry out the display of the second frame picture, in the second frame picture, all display units 301 are made all to apply the gray scale voltage of GTG [1], and detect the touch control unit Detection capacitance value being now positioned at the touch control unit 201 of touch control display apparatus center ... with said method, until obtain the touch control unit Detection capacitance value corresponding to 256 gray scale voltages.
It should be noted that, because the size of touch control unit 201 is much smaller than the size of touch control display apparatus, under each frame picture, when identical gray scale voltage is applied to all display units 301 of touch control display apparatus, substantially identical in multiple touch control unit Detection capacitance values of touch control display apparatus near central regions, touch control unit near touch control display apparatus fringe region 201 be also more or less the same in the touch control unit Detection capacitance value of the touch control unit 201 of touch control display apparatus near central regions, therefore the present invention is to when applying all display unit 301 of gray scale voltage to touch control display apparatus frame by frame, the touch control unit Detection capacitance value that detection is positioned at touch control display apparatus center touch control unit 201 does not limit, in other embodiments, the touch control unit Detection capacitance value being positioned at other position touch control units 201 of touch control display apparatus can also be detected.
Described second memory module 404B is for storing the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values from touch control unit 201 with different relative position relation.
Before storage has the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values of different relative position relation from touch control unit 201 in described memory module 404, need the weighing factor obtaining display unit 301 pairs of touch control unit Detection capacitance values from each touch control unit 201 with different relative position relation.
Described weighing factor only reflects the Different Effects that display unit 301 causes touch control unit Detection capacitance value owing to having different position relationships from touch control unit 201.Continue with reference to figure 5, in the present embodiment, obtain the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values from touch control unit 201 with different relative position relation by experiment:
In the present embodiment, using one of them touch control unit 201 of touch control display apparatus as experiment touch control unit.Be positioned at the display unit 301 at touch control unit 201 center as center display unit 501.
It should be noted that, illustrate only 81 display units 301 centered by center display unit 501 in Figure 5, described touch control display apparatus also comprises the multiple display units except the display unit 301 shown in Fig. 5.Touch control unit 201 position comprises 25 display units 301 in Figure 5, but the present invention does not limit touch control unit 201 to comprise display unit 301 quantity in position, in other embodiments, touch control unit 201 position can comprise the display unit 301 of any amount.
In the present embodiment, the shape of described touch control unit 201 is rectangle, but the shape of the present invention to touch control unit 201 does not limit, and in other embodiments, the shape of described touch control unit 201 can also be circular or other shapes.It should be noted that, the shape of described touch control unit 201 is rectangle or circle, and the shape approximation referring to touch control unit 201, in rectangle or circle, might not be restricted to accurate rectangle or circle.Such as, the shape of described touch control unit 201 figure being similar to rectangle that can form for the public electrode of multiple strip.
According to the experiment measuring the corresponding influence coefficient of different gray scale voltage, record the first gray scale voltage, the influence coefficient that described first gray scale voltage is corresponding is maximum, records the second gray scale voltage, and the influence coefficient that described second gray scale voltage is corresponding is minimum.
Region dividing is carried out to array of display cells, using the central point of touch control unit 201 as inspection center, choose described inspection center just to the display unit 301 of position as center display unit 501, centered by described center display unit 501, delimit the first reference zone comprising one or more display unit 301, first gray scale voltage is applied to the display unit 301 in described first reference zone, second gray scale voltage is applied to all the other display units 301 outside the first reference zone, touch control capacitance detection is carried out to touch control unit 201, to obtain the touch control unit Detection capacitance value that will now measure, and as the first Detection capacitance value.
Centered by described center display unit 501, delimit the second reference zone comprising multiple display unit 301, the second reference zone is made to comprise described first reference zone, the quantity of the display unit 301 in described second reference zone is greater than the quantity of the display unit 301 in the first reference zone, first gray scale voltage is applied to the display unit 301 in described second reference zone, second gray scale voltage is applied to all the other display units 301 outside the second reference zone, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value.
Bring the first Detection capacitance value and the second Detection capacitance value into weight equation, the weighing factor using the numerical value obtained as the multiple display units 301 within the second reference zone and outside the first reference zone.
In order to make the weighing factor of acquisition react the impact of different position of display unit on touch control unit Detection capacitance value better, make the shape of the first reference zone of delimitation, the shape of the second reference zone and touch control unit 201 close.In the present embodiment, first reference zone, the second reference zone are centered by described center display unit 501, comprise the referential array of multiple display unit 301, line number and the columns of referential array are equal, but the present invention does not limit whether the line number of referential array is equal with columns, does not also limit the shape of reference zone.
In the present embodiment, for obtaining all weighing factors touch control unit Detection capacitance value to the display unit 301 of comparatively obviously impact, need repeatedly to delimit the first reference zone and the second reference zone, and obtain the step of the first Detection capacitance value and the second Detection capacitance value, and using second reference zone of delimiting at every turn as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, with after each delimitation the first reference zone and the second reference zone, obtain the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
Particularly, scope first using center display unit 501 as the first initial reference zone, the area of center display unit 501 is the initial value of the first reference zone area, line number and the columns of namely initial referential array are 1, first gray scale voltage is applied to center display unit 501, second gray scale voltage is applied to all the other display units 301 outside center display unit 501, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the first Detection capacitance value.The area of records center display unit 501, as the first parameter.
Centered by described center display unit 501, delimit the second reference zone comprising multiple display unit 301, make the second reference zone comprise described first reference zone, the quantity of the display unit in described second reference zone is greater than the quantity of the display unit in the first reference zone.Particularly, make described second reference zone for centered by center display unit 501, comprise the first referential array 502 of 9 display units 301, line number and the columns of described first referential array 502 are 3, and the first referential array 502 comprises center display unit 501 and surrounds 8 display units 301 of center display unit 501.Record the area of the first referential array 502, as the second parameter.
First gray scale voltage is applied to the display unit 301 in the first referential array 502, second gray scale voltage is applied to all the other display units 301 outside the first referential array 502, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value.
Second gray scale voltage is applied to all display units 301 of touch control display apparatus, using the touch control unit Detection capacitance value now measured as tri-consult volume.
First gray scale voltage is applied to all display units 301 of touch control display apparatus, using the touch control unit Detection capacitance value now measured as the 4th parameter.
Bring described first parameter, the second parameter, tri-consult volume, the 4th parameter, the first Detection capacitance value and the second Detection capacitance value into weight equation in the lump, to obtain the weighing factor of 8 display units 301 within the second reference zone and outside the first reference zone.
It should be noted that, in the present embodiment, for convenience of calculating, the weighing factor of different display unit 301 can be made all to be less than or equal to 1.Due to center display unit 501 position having the greatest impact to the touch control detection capacitance of touch control unit 201, therefore, in the present embodiment, the weighing factor of default center display unit 501 is 1.But the weighing factor of center display unit 501, to whether the weighing factor of center display unit 501 being set as that 1 does not limit, can also be set as other numerical value by the present invention.
In the present embodiment, described weight equation is:
y＝(C2-C1)/[(Cmax-Cmin)*(area2-area1)]。
Wherein, y weighing factor, C2 is the second Detection capacitance value, and C1 is the first Detection capacitance value, and Cmax is the 4th parameter, and Cmin is tri-consult volume, and area2 is the second parameter, and area1 is the first parameter.
It should be noted that, according to the weight equation in the present embodiment, the weighing factor obtained and the first Detection capacitance value, the second Detection capacitance value is correlated with; Also with the difference correlation of the area of the first reference zone and the second reference zone, the weighing factor therefore obtained according to the weight equation of the present embodiment can comparatively accurately react there is with touch control unit 201 diverse location relation display unit 301 on the impact of touch control unit Detection capacitance value.But the concrete form of the present invention to weight equation does not limit, in other embodiments, weight equation only can also comprise the first Detection capacitance value and the second Detection capacitance value two parameters, or comprise the first Detection capacitance value, second Detection capacitance value, tri-consult volume, the 4th parameter is totally four parameters.Any change to weight equation concrete form is all within scope.
Because the shape of reference zone is close with the shape of touch control unit 201, in the present embodiment, therefore can think that the weighing factor of multiple display unit 301 is all identical within the second reference zone and outside the first reference zone.
In the present embodiment, in the above described manner, repeatedly delimit the first reference zone and the second reference zone, and obtain the step of the first Detection capacitance value and the second Detection capacitance value, wherein each second reference zone of delimiting is as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, after obtaining each delimitation the first reference zone and the second reference zone, the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
Such as in the present embodiment, delimitation center display unit 501 be the first reference zone, first referential array 502 carries out delimitation first reference zone and the second reference zone after being the second reference zone again, and obtains the step of the first Detection capacitance value and the second Detection capacitance value.Delimiting in the step of the first reference zone and the second reference zone at this, is the first reference zone with the first referential array 502, is the second reference zone with the second referential array 503.Described second referential array 503, centered by center display unit 501, comprises the first referential array 502 and surrounds 16 display units 301 of the first referential array 502.Record the area of the first referential array 502, as the first parameter, record the area of the second referential array 503, as the second parameter.The the first Detection capacitance value obtained after this being delimited the first reference zone and the second reference zone, the second Detection capacitance value, the first parameter, the second parameter and tri-consult volume, the 4th parameter bring weight equation in the lump into, obtain the weighing factor of 16 display units 301 within the second reference zone and outside the first reference zone.
It should be noted that, in the present embodiment, the first reference zone and the second reference zone are referential array, and compared with the first reference zone, line number and the columns of the referential array of the second reference zone all increase by 2.
It should be noted that, the scope of the present invention to the first initial reference zone does not limit, in other embodiments, and can also using the first referential array 502 and even larger referential array as the first initial reference zone.The present invention is pair compared with the first reference zone, the quantity that the line number of the referential array of the second reference zone and columns increase also does not limit, in other embodiments, compared with the first reference zone, the line number of the referential array of the second reference zone and the increase number of columns can also be the numerical value of the integral multiple of 2.
Also it should be noted that, in other embodiments, when the shape of described touch control unit 201 is circular, described first reference zone, the second reference zone can be centered by described center display unit 501, comprise the display unit set of multiple display unit 301.The outermost multiple display unit 301 of described display unit set is equal to the distance of center display unit 501.Like this, the shape of display unit set is also similar to circle.The radius of the second reference zone is greater than the radius of the first reference zone.
Also it should be noted that, in the present embodiment, each display unit 301 comprises three sub-pixel unit, and when carrying out the experiment obtaining weighing factor, the gray scale voltage that three sub-pixel unit of each display unit 301 apply is identical.
Because the weighing factor of the display unit 301 far away apart from the inspection center of experiment touch control unit is less, when revising touch control unit Detection capacitance value, weighing factor less is like this negligible.Therefore, in the present embodiment, when carrying out the experiment obtaining weighing factor, can comprise the sample area of multiple display unit 301 setting up, the weighing factor of display unit to touch control unit being positioned at described sample area is more than or equal to and is positioned at the weighing factor of the display unit outside described sample area to touch control unit.After the weighing factor obtaining display unit 301 in sample area, ignore all the other display units 301 to the impact of touch control detection capacitance, in the second memory module 404B, store display unit 301 in the described sample area weighing factor to experiment touch control unit.
Particularly, the step setting up sample area can be carried out with the experimental synchronous obtaining weighing factor:
Initial value using the area of center display unit 501 as the first reference zone area, repeatedly delimit the step of the first reference zone and the second reference zone, and wherein each second reference zone of delimiting is as first reference zone of delimiting next time;
Using the area of first reference zone of delimiting at every turn as the first parameter;
Using the area of second reference zone of delimiting at every turn as the second parameter;
Each delimit the first reference zone and the second reference zone after, obtain the first Detection capacitance value to the second Detection capacitance value, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter;
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtains the 7th parameter;
When the 5th parameter is less than or equal to the 7th parameter, using reference zone now as sample area.
Particularly, continue with reference to figure 5, be the first reference zone to delimit the second referential array 503,3rd referential array 504 is the second reference zone is example, described 3rd referential array 504, centered by center display unit 501, comprises described second referential array 503 and surrounds 24 display units 301 of described second referential array 503.
Using the area of the second referential array 503 as the first parameter, using the area of the 3rd referential array 504 as the second parameter.
Be the first reference zone at delimitation second referential array 503, after the 3rd referential array 504 is the second reference zone, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter.
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtain the 7th parameter, this predetermined coefficient can in the scope of 0.01 to 0.4, like this 5th parameter and the 7th parameter are compared, can reflect more accurately and again delimit the first reference zone and the second reference zone at every turn, and using the last time delimit the second reference zone as first reference zone of delimiting next time time, relation between the variable quantity of touch control unit Detection capacitance value and the second reference zone area change amount, but the concrete numerical value of the present invention to predetermined coefficient does not limit.
When the 5th parameter is less than or equal to the 7th parameter, using the second current reference zone as sample area, namely sample area is the 3rd referential array 504 comprising 49 display units.Outside the scope of sample area, along with the increase of referential array area, the touch control detection capacitance variation measured after at every turn again delimiting the first reference zone and the second reference zone is very little, the 301 pairs of touch control detection capacitances of display unit outside the scope of sample area can be ignored as noise.
It should be noted that, in the present embodiment, using the 3rd referential array 504 as sample area, but the scope included by sample area is determined with actual conditions.In general, need repeatedly to delimit the first reference zone and the second reference zone, and the step that second reference zone of being delimited the last time delimited as first reference zone of delimiting next time, to determine the scope of sample area.
Also it should be noted that, in other embodiments, when the 5th parameter is less than or equal to the 7th parameter, can also using the first reference zone as sample area, namely sample area is the second referential array 503.
For other touch control units 201 except above-mentioned experiment touch control unit in touch control display apparatus, with said method, each touch control unit 201 can be tested, obtain weighing factor and the sample area of each touch control unit 201 correspondence.For generalized case, simply, can also record in above-mentioned experiment, the weighing factor of each display unit 301 in the experiment sample area of touch control unit and sample area, other touch control units 201 can set up sample area of the same area with the sample area of testing touch control unit, and the weighing factor of each display unit 301 in the sample area of experiment touch control unit is extrapolated in other touch control units, to obtain the weighing factor of a display unit 301 in the sample area of other touch control units 201 and sample area.
It should be noted that, under normal circumstances, the size of the sample area of multiple touch control unit 201 is identical, but at the boundary of touch control display apparatus, due to the restriction on border, the sample area area of boundary touch control unit 201 may be less than the sample area area of the touch control unit 201 of touch control display apparatus middle part.Can adjust accordingly sample area as the case may be; such as in the maximum area that touch control display apparatus boundary can reach using the reference zone suitable with touch control unit 201 size as sample area, be similar to this trickle adjustment all within scope.
In acquisition touch control display apparatus, in the sample area of each touch control unit 201 correspondence and sample area a display unit 301 weighing factor after, in the second memory module 404B, store the weighing factor of a display unit 301 in the sample area of each touch control unit 201 correspondence and sample area.
Described analysis module 403 can transmit according to receiving display module 401 the current gray scale voltage being applied to each display unit 301 of coming, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit 301, according to obtained influence coefficient and with stored weighing factor, the modifying factor that the touch control unit Detection capacitance value obtaining each touch control unit 201 affects by described gray scale voltage, and according to the modifying factor that current display image obtains, touch control unit Detection capacitance value is revised.
Particularly, in the present embodiment, make driving circuit drive described touch control display apparatus work, carry out touching the course of work detected as follows:
Continue with reference to figure 5, display module 401 applies gray scale voltage to each display unit 301, carries out image display to drive described touch control display apparatus.In the present embodiment, using public electrode 109 as the touch detecting electrode of self-capacitance detecting pattern, need to do time-sharing multiplex to public electrode 109, it is complete in a two field picture display when touch control display apparatus carries out image display, before the display of another two field picture, the gray scale voltage being applied to each display unit 301 is transferred to the correcting module 405 in described analysis module 403 by described display module 401, described correcting module 405 is according to the gray scale voltage being applied to each display unit 301, call the look-up table be stored in the first memory module 404A, thus obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 of each display unit 301, and the influence coefficient of current for each display unit 301 touch control unit Detection capacitance value to touch control unit 201 is formed the first matrix.
Described correcting module can obtain the weighing factor of the display unit 301 pairs of touch control units 201 in the described sample area corresponding with described touch control unit 201 from described second memory module 404B, forms the second matrix.
In described correcting module 405, each influence coefficient in described first matrix is multiplied with the weighing factor of influence coefficient co-located with the second matrix, obtain the 3rd matrix be made up of multiple correction factor, in described 3rd matrix, numerical value sum is as modifying factor.
Described driver module 402 is worked, described touch display unit is driven to carry out touch sensible, revise according to the measured value of modifying factor to touch sensible that current display image obtains, in the present embodiment, namely the measured value of described touch sensible detects the touch control unit Detection capacitance value obtained on each touch control unit 201.
Particularly, in the present embodiment, when driver module 402 drives described touch display unit to carry out touch sensible, bring modifying factor corresponding with each touch control unit 201 for the touch control unit Detection capacitance value of the touch sensible of each touch control unit 201 into electric capacity as parameter and repair equation, obtain capacitance after the correction of each touch control unit 201, to revise the touch control unit Detection capacitance value of rear capacitance as reality.
After revising, capacitance eliminates the impact of liquid crystal deflection on touch control unit Detection capacitance value, the change of touch control unit Detection capacitance value when can reflect finger touch more realistically, thus improves the precision touching and detect.
It should be noted that, whether the present invention, to complete in a two field picture display when carrying out image display at touch control display apparatus, carry out touch detection and does not limit before the display of another two field picture.In other embodiments, image display and touch detection can also be carried out simultaneously.
Such as, in other embodiments, described touch control display apparatus comprises the first viewing area and the second viewing area, and the first viewing area and the second viewing area comprise multiple display unit 301 respectively, and the multiple touch control units 201 corresponding with multiple display unit 301.
Display module 401 applies gray scale voltage to each display unit 301, comprise with the step driving described touch control display apparatus to carry out image display: in the first viewing area each display unit 301 charge complete carry out image display time, apply each display unit 301 of gray scale voltage to the second viewing area, carry out image display to drive the second viewing area.
Now in the first viewing area, the gray scale voltage of display unit 301 is stablized, can according to the gray scale voltage being applied to each display unit 301 in the first viewing area, obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 each in the first viewing area of each display unit 301 in the first viewing area, and carry out touch detection further by driver module, and touch control unit Detection capacitance value after obtaining correction.Can carry out the image display of the touch detection of the touch control unit 201 of the first viewing area and each display unit 301 of the second viewing area so simultaneously.It should be noted that, when in the first viewing area, the gray scale voltage of display unit 301 is stablized, can in the image display process of each display unit 301 of the second viewing area, or in the first viewing area each display unit 301 image of the display of each display unit 301 image and the second viewing area show between time in, obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 each in the first viewing area of each display unit 301 in the first viewing area.
It should be noted that, in the present embodiment, each described display unit 301 comprises three sub-pixel unit: red sub-pixel unit, green sub-pixels unit, blue subpixels unit.Due to the very tiny and close-packed arrays of three sub-pixel unit, can think the identical to touch control unit 201 weighing factor of three sub-pixel unit, red sub-pixel unit, green sub-pixels unit, influence coefficient that blue subpixels unit is corresponding can be obtained respectively, the influence coefficient using the mean value of three sub-pixel unit influence coefficients as display unit 301 pairs of touch control unit Detection capacitance values by look-up table.Suppose that the gray scale voltage of three sub-pixel unit is respectively GTG [R], GTG [G], GTG [B], each display unit 301 is (table [R]+table [G]+table [B])/3 by the influence coefficient that look-up table obtains.
In other embodiments, the influence coefficient of each sub-pixel unit in sample area can also be obtained respectively, form the 4th matrix, the weighing factor of each sub-pixel unit in store sample region in a storage module, form the 5th matrix, be multiplied with the weighing factor of influence coefficient co-located with the 5th matrix by each influence coefficient in described 4th matrix, obtain the 6th matrix be made up of multiple correction factor, in described 6th matrix, numerical value sum is as modifying factor.The correction factor that described 6th matrix comprises is be three times of the correction factor that the 3rd matrix comprises, and the modifying factor calculated is more accurate compared with the modifying factor in the 3rd matrix, but required calculated amount is larger.
It should be noted that, due in the present embodiment, described touch control display apparatus comprises and is bundled in display on first substrate 100 and touches detection chip (not shown), and described display touches the display module 401 of built-in described driving circuit in detection chip, driver module 402 and analysis module 403.Display module 401, between driver module 402 and analysis module 403 can by display touch detection chip control, touch detection chip by display exchange easily and transmit the information such as influence coefficient, weighing factor, gray scale voltage, but whether the present invention is integrated in a display to display module 401, driver module 402 and analysis module 403 touches in detection chip and does not limit.In other embodiments, described touch control display apparatus can also comprise display driver chip and touch detection chip, the display module 401 of built-in described driving circuit in described display driver chip, the driver module 402 of built-in described driving circuit and analysis module 403 in described touch detection chip, described display driver chip and touch detection chip and be all bundled on first substrate 100.In the above-described embodiments, because display module 401 and driver module 402, analysis module 403 lay respectively on two chips, therefore need other process chip (as central processing unit) to as described in display driver chip and touch detection chip and control, make can exchange and transmit the information such as influence coefficient, weighing factor, gray scale voltage between display module 401 and driver module 402, analysis module 403.
The present invention also provides a kind of driving method of touch control display apparatus, and this touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display.By detecting when finger touch touch control display apparatus, the touch control unit Detection capacitance value change of touch control unit, realizes touching and detects.
With reference to figure 6, show the process flow diagram of the driving method of touch control display apparatus of the present invention, the driving method of touch control display apparatus of the present invention comprises:
Step S1, stores the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
Step S2, stores and has the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from touch control unit.
Step S3, applies gray scale voltage to each display unit, carries out image display to drive described touch control display apparatus.
Step S4, according to the gray scale voltage being applied to each display unit, obtains the current influence coefficient to touch control unit Detection capacitance value of each display unit.
Step S5, according to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage.
Step S6, drives described touch display unit to carry out touch sensible, revises according to the measured value of modifying factor to touch sensible that current display image obtains.
Particularly, can continue with reference to figure 3, Fig. 5, described touch control display apparatus is the touch control display apparatus using display panels as display section.The liquid crystal layer (not shown) that described touch control display apparatus comprises first substrate 100, second substrate (not shown) and is arranged between first substrate 100, second substrate, described display unit 301 is arranged on described first substrate 100, and described touch control unit 201 is arranged on described first substrate 100 or second substrate.The touch detecting pattern of the present invention to described touch control unit 201 does not limit, and described touch control unit 201 can carry out touch detection with the pattern of self-capacitance or mutual capacitance.
As described in the embodiment of touch control display apparatus provided by the invention, be applied to the liquid crystal deflection difference that the different gray scale voltages on display unit 301 cause, the touch control unit Detection capacitance value of described touch control unit 201 can be affected.
By the driving method of touch control display apparatus provided by the invention, the measured value of touch control unit Detection capacitance value can be revised, obtain not by the touch control unit Detection capacitance value of different gray scale voltages interference, and then improve the precision of touch control display apparatus.
Below in conjunction with Fig. 3 to Fig. 5, an embodiment of the driving method of touch control display apparatus provided by the invention is described in detail.
Perform step S1, store the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
In the present embodiment, storing the method comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage is: store the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage.Such as when each described display unit 301 loading 256 different gray scale voltages, described look-up table can be expressed as table [0 ~ 255].
Before storage comprises the look-up table of each gray scale voltage and the influence coefficient corresponding with described gray scale voltage, need to obtain the influence coefficient corresponding with gray scale voltage by experiment.In conjunction with reference to figure 3, Fig. 5, in the present embodiment, under the method obtaining the influence coefficient corresponding with gray scale voltage by experiment enters:
Apply gray scale voltage frame by frame to all display units 301 of touch control display apparatus, wherein, for same frame, apply same gray scale voltage to all display units 301, for different frame, apply different gray scale voltages to all display units 301.
Apply gray scale voltage in the step of all display units 301 at every frame, all detect the Detection capacitance value being positioned at the touch control unit 201 of touch control display apparatus center, to obtain the touch control unit Detection capacitance value corresponding from different gray scale voltage.
It should be noted that, in the present embodiment, the mode of touch control display apparatus display frame is: make display unit 301 load gray scale voltage line by line.So line by line in touch control display apparatus often row display unit 301 all complete applying gray scale voltage, make touch control display apparatus can show the step of a complete picture, be commonly referred to as a frame.Apply gray scale voltage frame by frame to all display units 301 of touch control display apparatus, refer to the display making touch control display apparatus carry out multiframe picture.For same frame, apply same gray scale voltage to all display units 301, refer in each frame picture, the gray scale voltage that all display units 301 apply is identical.For different frame, apply different gray scale voltages to all display units 301, refer in different frame picture, the gray scale voltage being applied to display unit 301 is different.
It should be noted that, in the present embodiment, each described display unit 301 comprises three sub-pixel unit, and when all display units 301 apply same gray scale voltage, three sub-pixel unit of each described display unit 301 apply same gray scale voltage.
After obtaining the touch control unit Detection capacitance value corresponding from different gray scale voltage, using touch control unit Detection capacitance value corresponding to a preset gray scale voltage as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtains the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
Such as, in the picture of different frame, each described display unit 301 loads multiple when arriving large different gray scale voltage from childhood, the touch control unit Detection capacitance value that multiple gray scale voltage is corresponding can be measured respectively, using wherein maximum touch control unit Detection capacitance value as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtain the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, the maximal value of the influence coefficient of such acquisition is 1, is convenient to calculate.But whether the present invention is to not limiting using maximum touch control unit Detection capacitance value as reference capacitance value.
It should be noted that, influence coefficient only reflects the impact of different gray scale voltage on touch control unit Detection capacitance value, but in the process obtaining influence coefficient, different from the impact of display unit 301 on touch control unit Detection capacitance value that touch control unit 201 has diverse location relation, in order to the interference that the display unit 301 reducing diverse location causes acquisition influence coefficient, in the present embodiment, carrying out obtaining in the experiment of the influence coefficient corresponding with gray scale voltage, under each frame picture, identical gray scale voltage is applied to all display units 301 ground of touch control display apparatus, under different frame picture, different gray scale voltages is applied to display unit 301.Such as each display unit 301 can apply from GTG [0] to GTG [255] totally 256 gray scale voltages, when the gray scale voltage needing to detect is GTG [0], touch control display apparatus is made to carry out the display of the first frame picture, in the first frame picture, make all display units 301 all apply the gray scale voltage of GTG [0], and detect the touch control unit Detection capacitance value being now positioned at the touch control unit 201 of touch control display apparatus center.When namely supposing that touch control display apparatus comprises the touch control unit 201 of 9 row 9 row, the touch control unit Detection capacitance value of touch control unit 201 under the gray scale voltage of GTG [0] being positioned at touch control display apparatus the 5th row the 5th row can be detected.Because the size of touch control unit 201 is much smaller than the size of touch control display apparatus, and the gray scale voltage of all display units 301 is GTG [0], can think that the touch control unit Detection capacitance value now detected is only relevant with GTG [0], thus make the influence coefficient of acquisition only reflect the impact of different gray scale voltage on touch control unit Detection capacitance value.When the gray scale voltage needing to detect is GTG [1], touch control display apparatus is made to carry out the display of the second frame picture, in the second frame picture, all display units 301 are made all to apply the gray scale voltage of GTG [1], and detect the touch control unit Detection capacitance value being now positioned at the touch control unit 201 of touch control display apparatus center ... with said method, until obtain the touch control unit Detection capacitance value corresponding to 256 gray scale voltages.
It should be noted that, because the size of touch control unit 201 is much smaller than the size of touch control display apparatus, under each frame picture, when identical gray scale voltage is applied to all display units 301 of touch control display apparatus, substantially identical in multiple touch control unit Detection capacitance values of touch control display apparatus near central regions, touch control unit near touch control display apparatus fringe region 201 be also more or less the same in the touch control unit Detection capacitance value of the touch control unit 201 of touch control display apparatus near central regions, therefore the present invention is to when applying all display unit 301 of gray scale voltage to touch control display apparatus frame by frame, the touch control unit Detection capacitance value that detection is positioned at touch control display apparatus center touch control unit 201 does not limit, in other embodiments, the touch control unit Detection capacitance value being positioned at other position touch control units 201 of touch control display apparatus can also be detected.
Acquisition to after the influence coefficient of touch control unit Detection capacitance value, stores the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value from different gray scale voltage.
Perform step S2, store and there is the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from touch control unit 201.
Store before there is the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values of different relative position relation from touch control unit 201, need to obtain by experiment and there is the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from each touch control unit 201.
Described weighing factor only reflects the Different Effects that display unit 301 causes touch control unit Detection capacitance value owing to having different position relationships from touch control unit 201.Continue with reference to figure 5, in the present embodiment, obtain the weighing factor of display unit 301 pairs of touch control unit Detection capacitance values from touch control unit 201 with different relative position relation by experiment:
In the present embodiment, using one of them touch control unit 201 of touch control display apparatus as experiment touch control unit.Be positioned at the display unit 301 at touch control unit 201 center as center display unit 501.
It should be noted that, illustrate only 81 display units 301 centered by center display unit 501 in Figure 5, described touch control display apparatus also comprises the multiple display units except the display unit 301 shown in Fig. 5.Touch control unit 201 position comprises 25 display units 301 in Figure 5, but the present invention does not limit touch control unit 201 to comprise display unit 301 quantity in position, in other embodiments, touch control unit 201 position can comprise the display unit 301 of any amount.
In the present embodiment, the shape of described touch control unit 201 is rectangle, but the shape of the present invention to touch control unit 201 does not limit, and in other embodiments, the shape of described touch control unit 201 can also be circular or other shapes.It should be noted that, the shape of described touch control unit 201 is rectangle or circle, and the shape approximation referring to touch control unit 201, in rectangle or circle, might not be restricted to accurate rectangle or circle.Such as, the shape of described touch control unit 201 figure being similar to rectangle that can form for the public electrode of multiple strip.
According to the experiment measuring the corresponding influence coefficient of different gray scale voltage, record the first gray scale voltage, the influence coefficient that described first gray scale voltage is corresponding is maximum, records the second gray scale voltage, and the influence coefficient that described second gray scale voltage is corresponding is minimum.
Region dividing is carried out to array of display cells, using the central point of touch control unit 201 as inspection center, choose described inspection center just to the display unit 301 of position as center display unit 501, centered by described center display unit 501, delimit the first reference zone comprising one or more display unit 301, first gray scale voltage is applied to the display unit 301 in described first reference zone, second gray scale voltage is applied to all the other display units 301 outside the first reference zone, touch control capacitance detection is carried out to touch control unit 201, to obtain the touch control unit Detection capacitance value that will now measure, and as the first Detection capacitance value.
Centered by described center display unit 501, delimit the second reference zone comprising multiple display unit 301, the second reference zone is made to comprise described first reference zone, the quantity of the display unit 301 in described second reference zone is greater than the quantity of the display unit 301 in the first reference zone, first gray scale voltage is applied to the display unit 301 in described second reference zone, second gray scale voltage is applied to all the other display units 301 outside the second reference zone, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value.
Bring the first Detection capacitance value and the second Detection capacitance value into weight equation, the weighing factor using the numerical value obtained as the multiple display units 301 within the second reference zone and outside the first reference zone.
In order to make the weighing factor of acquisition react the impact of different position of display unit on touch control unit Detection capacitance value better, make the shape of the first reference zone of delimitation, the shape of the second reference zone and touch control unit 201 close.In the present embodiment, first reference zone, the second reference zone are centered by described center display unit 501, comprise the referential array of multiple display unit 301, line number and the columns of referential array are equal, but the present invention does not limit whether the line number of referential array is equal with columns, does not also limit the shape of reference zone.
In the present embodiment, for obtaining all weighing factors touch control unit Detection capacitance value to the display unit 301 of comparatively obviously impact, need repeatedly to delimit the first reference zone and the second reference zone, and obtain the step of the first Detection capacitance value and the second Detection capacitance value, wherein each second reference zone of delimiting is as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, with after each delimitation the first reference zone and the second reference zone, obtain the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
Particularly, scope first using center display unit 501 as the first initial reference zone, the area of center display unit 501 is the initial value of the first reference zone area, line number and the columns of namely initial referential array are 1, first gray scale voltage is applied to center display unit 501, second gray scale voltage is applied to all the other display units 301 outside center display unit 501, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the first Detection capacitance value.The area of records center display unit 501, as the first parameter.
Centered by described center display unit 501, delimit the second reference zone comprising multiple display unit 301, make the second reference zone comprise described first reference zone, the quantity of the display unit in described second reference zone is greater than the quantity of the display unit in the first reference zone.Particularly, make described second reference zone for centered by center display unit 501, comprise the first referential array 502 of 9 display units 301, line number and the columns of described first referential array 502 are 3, and the first referential array 502 comprises center display unit 501 and surrounds 8 display units 301 of center display unit 501.Record the area of the first referential array 502, as the second parameter.
First gray scale voltage is applied to the display unit 301 in the first referential array 502, second gray scale voltage is applied to all the other display units 301 outside the first referential array 502, touch control capacitance detection is carried out to touch control unit 201, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value.
Second gray scale voltage is applied to all display units 301 of touch control display apparatus, using the touch control unit Detection capacitance value now measured as tri-consult volume.
First gray scale voltage is applied to all display units 301 of touch control display apparatus, using the touch control unit Detection capacitance value now measured as the 4th parameter.
Bring described first parameter, the second parameter, tri-consult volume, the 4th parameter, the first Detection capacitance value and the second Detection capacitance value into weight equation in the lump, to obtain the weighing factor of 8 display units 301 within the second reference zone and outside the first reference zone.
It should be noted that, in the present embodiment, for convenience of calculating, the weighing factor of different display unit 301 can be made all to be less than or equal to 1.Due to center display unit 501 position having the greatest impact to the touch control detection capacitance of touch control unit 201, therefore, in the present embodiment, the weighing factor of default center display unit 501 is 1.But the weighing factor of center display unit 501, to whether the weighing factor of center display unit 501 being set as that 1 does not limit, can also be set as other numerical value by the present invention.
In the present embodiment, described weight equation is:
y＝(C2-C1)/[(Cmax-Cmin)*(area2-area1)]。
Wherein, y weighing factor, C2 is the second Detection capacitance value, and C1 is the first Detection capacitance value, and Cmax is the 4th parameter, and Cmin is tri-consult volume, and area2 is the second parameter, and area1 is the first parameter.
It should be noted that, according to the weight equation in the present embodiment, the weighing factor obtained and the first Detection capacitance value, the second Detection capacitance value is correlated with; Also with the difference correlation of the area of the first reference zone and the second reference zone, the weighing factor therefore obtained according to the weight equation of the present embodiment can comparatively accurately react there is with touch control unit 201 diverse location relation display unit 301 on the impact of touch control unit Detection capacitance value.But the concrete form of the present invention to weight equation does not limit, in other embodiments, weight equation only can also comprise the first Detection capacitance value and the second Detection capacitance value two parameters, or comprise the first Detection capacitance value, second Detection capacitance value, tri-consult volume, the 4th parameter is totally four parameters.Any change to weight equation concrete form is all within scope.
Because the shape of reference zone is close with the shape of touch control unit 201, in the present embodiment, therefore can think that the weighing factor of multiple display unit 301 is all identical within the second reference zone and outside the first reference zone.
In the present embodiment, in the above described manner, repeatedly delimit the first reference zone and the second reference zone, and obtain the step of the first Detection capacitance value and the second Detection capacitance value, wherein each second reference zone of delimiting is as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, after obtaining each delimitation the first reference zone and the second reference zone, the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
Such as in the present embodiment, delimitation center display unit 501 be the first reference zone, first referential array 502 carries out delimitation first reference zone and the second reference zone after being the second reference zone again, and obtains the step of the first Detection capacitance value and the second Detection capacitance value.Delimiting in the step of the first reference zone and the second reference zone at this, is the first reference zone with the first referential array 502, is the second reference zone with the second referential array 503.Described second referential array 503, centered by center display unit 501, comprises the first referential array 502 and surrounds 16 display units 301 of the first referential array 502.Record the area of the first referential array 502, as the first parameter, record the area of the second referential array 503, as the second parameter.The the first Detection capacitance value obtained after this being delimited the first reference zone and the second reference zone, the second Detection capacitance value, the first parameter, the second parameter and tri-consult volume, the 4th parameter bring weight equation in the lump into, obtain the weighing factor of 16 display units 301 within the second reference zone and outside the first reference zone.
It should be noted that, in the present embodiment, the first reference zone and the second reference zone are referential array, and compared with the first reference zone, line number and the columns of the referential array of the second reference zone all increase by 2.
It should be noted that, the scope of the present invention to the first initial reference zone does not limit, in other embodiments, and can also using the first referential array 502 and even larger referential array as the first initial reference zone.The present invention is pair compared with the first reference zone, the quantity that the line number of the referential array of the second reference zone and columns increase also does not limit, in other embodiments, compared with the first reference zone, the line number of the referential array of the second reference zone and the increase number of columns can also be the numerical value of the integral multiple of 2.
Also it should be noted that, in other embodiments, when the shape of described touch control unit 201 is circular, described first reference zone, the second reference zone can be centered by described center display unit 501, comprise the display unit set of multiple display unit 301.The outermost multiple display unit 301 of described display unit set is equal to the distance of center display unit 501.Like this, the shape of display unit set is also similar to circle.The radius of the second reference zone is greater than the radius of the first reference zone.
Also it should be noted that, in the present embodiment, each display unit 301 comprises three sub-pixel unit, and when carrying out the experiment obtaining weighing factor, the gray scale voltage that three sub-pixel unit of each display unit 301 apply is identical.
Because the weighing factor of the display unit 301 far away apart from the inspection center of experiment touch control unit is less, when revising touch control unit Detection capacitance value, weighing factor less is like this negligible.Therefore, in the present embodiment, when carrying out the experiment obtaining weighing factor, can comprise the sample area of multiple display unit 301 setting up, the weighing factor of display unit to touch control unit being positioned at described sample area is more than or equal to and is positioned at the weighing factor of the display unit outside described sample area to touch control unit.After the weighing factor obtaining display unit 301 in sample area, ignore all the other display units 301 to the impact of touch control detection capacitance, in the second memory module 404B, store display unit 301 in the described sample area weighing factor to experiment touch control unit.
Particularly, the step setting up sample area can be carried out with the experimental synchronous obtaining weighing factor:
Initial value using the area of center display unit 501 as the first reference zone area, repeatedly delimit the step of the first reference zone and the second reference zone, and wherein each second reference zone of delimiting is as first reference zone of delimiting next time;
Using the area of first reference zone of delimiting at every turn as the first parameter;
Using the area of second reference zone of delimiting at every turn as the second parameter;
Each delimit the first reference zone and the second reference zone after, obtain the first Detection capacitance value to the second Detection capacitance value, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter;
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtains the 7th parameter;
When the 5th parameter is less than or equal to the 7th parameter, using reference zone now as sample area.
Particularly, continue with reference to figure 5, be the first reference zone to delimit the second referential array 503,3rd referential array 504 is the second reference zone is example, described 3rd referential array 504, centered by center display unit 501, comprises described second referential array 503 and surrounds 24 display units 301 of described second referential array 503.
Using the area of the second referential array 503 as the first parameter, using the area of the 3rd referential array 504 as the second parameter.
Be the first reference zone at delimitation second referential array 503, after the 3rd referential array 504 is the second reference zone, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter.
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtain the 7th parameter, this predetermined coefficient can in the scope of 0.01 to 0.4, like this 5th parameter and the 7th parameter are compared, can reflect more accurately and again delimit the first reference zone and the second reference zone at every turn, and using the last time delimit the second reference zone as first reference zone of delimiting next time time, relation between the variable quantity of touch control unit Detection capacitance value and the second reference zone area change amount, but the concrete numerical value of the present invention to predetermined coefficient does not limit.
When the 5th parameter is less than or equal to the 7th parameter, using the second current reference zone as sample area, namely sample area is the 3rd referential array 504 comprising 49 display units.Outside the scope of sample area, along with the increase of referential array area, the touch control detection capacitance variation measured after at every turn again delimiting the first reference zone and the second reference zone is very little, the 301 pairs of touch control detection capacitances of display unit outside the scope of sample area can be ignored as noise.
It should be noted that, in the present embodiment, using the 3rd referential array 504 as sample area, but the scope included by sample area is determined with actual conditions.In general, need repeatedly to delimit the first reference zone and the second reference zone, and the step that second reference zone of being delimited the last time delimited as first reference zone of delimiting next time, to determine the scope of sample area.
Also it should be noted that, in other embodiments, when the 5th parameter is less than or equal to the 7th parameter, can also using the first reference zone as sample area, namely sample area is the second referential array 503.
For other touch control units 201 except above-mentioned experiment touch control unit in touch control display apparatus, with said method, each touch control unit 201 can be tested, obtain weighing factor and the sample area of each touch control unit 201 correspondence.For generalized case, simply, can also record in above-mentioned experiment, the weighing factor of each display unit 301 in the experiment sample area of touch control unit and sample area, other touch control units 201 can set up sample area of the same area with the sample area of testing touch control unit, and the weighing factor of each display unit 301 in the sample area of experiment touch control unit is extrapolated in other touch control units, to obtain the weighing factor of a display unit 301 in the sample area of other touch control units 201 and sample area.
It should be noted that, under normal circumstances, the size of the sample area of multiple touch control unit 201 is identical, but at the boundary of touch control display apparatus, due to the restriction on border, the sample area area of boundary touch control unit 201 may be less than the sample area area of the touch control unit 201 of touch control display apparatus middle part.Can adjust accordingly sample area as the case may be; such as in the maximum area that touch control display apparatus boundary can reach using the reference zone suitable with touch control unit 201 size as sample area, be similar to this trickle adjustment all within scope.
In acquisition touch control display apparatus, in the sample area of each touch control unit 201 correspondence and sample area a display unit 301 weighing factor after, store the weighing factor of a display unit 301 in the sample area of each touch control unit 201 correspondence and sample area.
Perform step S3, apply gray scale voltage to each display unit 301, carry out image display to drive described touch control display apparatus.
Perform step S4, according to the gray scale voltage being applied to each display unit 301, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit 301.
Particularly, in the present embodiment, obtain the gray scale voltage of the display unit 301 be applied in sample area, obtain the single 301 current influence coefficients to touch control unit Detection capacitance value of each display in sample area, form the first matrix.
It should be noted that, in the present embodiment, it is complete in a two field picture display when touch control display apparatus carries out image display, before the display of another two field picture, according to the gray scale voltage being applied to each display unit 301, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit 301, form the first matrix.
It should be noted that, in the present embodiment, each described display unit 301 comprises three sub-pixel unit: red sub-pixel unit, green sub-pixels unit, blue subpixels unit.Due to the very tiny and close-packed arrays of three sub-pixel unit, can think the identical to touch control unit 201 weighing factor of three sub-pixel unit, red sub-pixel unit, green sub-pixels unit, influence coefficient that blue subpixels unit is corresponding can be obtained respectively, the influence coefficient using the mean value of three sub-pixel unit influence coefficients as display unit 301 pairs of touch control unit Detection capacitance values by look-up table.Suppose that the gray scale voltage of three sub-pixel unit is respectively GTG [R], GTG [G], GTG [B], each display unit 301 is (table [R]+table [G]+table [B])/3 by the influence coefficient that look-up table obtains.
With reference to figure 5, perform step S5, according to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage.
Particularly, in the present embodiment, the weighing factor of the display unit 301 pairs of touch control units 201 in described sample area is formed the second matrix.
Be multiplied with the weighing factor of influence coefficient co-located with the second matrix by each influence coefficient in described first matrix, obtain the 3rd matrix be made up of multiple correction factor, in described 3rd matrix, numerical value sum is as modifying factor.Described modifying factor can reflect that liquid crystal deflection that gray scale voltage causes is on the impact of touch control unit Detection capacitance value.
Step S6, drives described touch display unit to carry out touch sensible, revises according to the measured value of modifying factor to touch sensible that current display image obtains.
Drive described touch display unit to carry out touch sensible, revise according to the measured value of modifying factor to touch sensible that current display image obtains.
Particularly, in the present embodiment, bring modifying factor corresponding with each touch control unit 201 for each touch control unit Detection capacitance value into electric capacity as parameter and repair equation, obtain capacitance after the correction of each touch control unit 201, to revise the touch control unit Detection capacitance value of rear capacitance as reality.
After revising, capacitance eliminates the impact of liquid crystal deflection on the measured value of touch control unit Detection capacitance value, the change of touch control unit Detection capacitance value when can reflect finger touch more realistically, thus improves the precision touching and detect.
It should be noted that, the influence coefficient of driving method of the present invention to whether using the mean value of three sub-pixel unit influence coefficients as display unit 301 pairs of touch control unit Detection capacitance values does not limit.The influence coefficient of each sub-pixel unit in sample area can also be obtained respectively, form the 4th matrix, the weighing factor of each sub-pixel unit in store sample region in a storage module, form the 5th matrix, each influence coefficient in described 4th matrix is multiplied with the weighing factor of influence coefficient co-located with the 5th matrix, obtain the 6th matrix be made up of multiple correction factor, in described 6th matrix, numerical value sum is as modifying factor.The correction factor that described 6th matrix comprises is be three times of the correction factor that the 3rd matrix comprises, and the modifying factor calculated is more accurate compared with the modifying factor in the 3rd matrix, but required calculated amount is larger.
When described touch control display apparatus is white and black displays device, each display unit only comprises a sub-pixel unit, therefore the current influence coefficient to touch control unit Detection capacitance value of each display unit 301 i.e. the current influence coefficient to touch control unit Detection capacitance value of each sub-pixel unit.
Also it should be noted that, whether the present invention, to complete in a two field picture display when carrying out image display at touch control display apparatus, carry out touch detection and does not limit before the display of another two field picture.In other embodiments, image display and touch detection can also be carried out simultaneously.
Such as, in other embodiments, described touch control display apparatus comprises the first viewing area and the second viewing area, and the first viewing area and the second viewing area comprise multiple display unit 301 respectively, and the multiple touch control units 201 corresponding with multiple display unit 301.
Apply gray scale voltage to each display unit 301, comprise with the step driving described touch control display apparatus to carry out image display: in the first viewing area display unit 301 charge complete carry out image display time, apply each display unit 301 of gray scale voltage to the second viewing area, carry out image display to drive the second viewing area.
Now in the first viewing area, the gray scale voltage of display unit 301 is stablized, can according to the gray scale voltage being applied to each display unit in the first viewing area, obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 each in the first viewing area of each display unit in the first viewing area, and carry out touch detection further by driver module, and touch control unit Detection capacitance value after obtaining correction.Can carry out the image display of the touch detection of the touch control unit 201 of the first viewing area and each display unit 301 of the second viewing area so simultaneously.It should be noted that, when in the first viewing area, the gray scale voltage of display unit 301 is stablized, can in the image display process of each display unit 301 of the second viewing area, or in the first viewing area each display unit 301 image of the display of each display unit 301 image and the second viewing area show between time in, obtain the influence coefficient of the current touch control unit Detection capacitance value to touch control unit 201 each in the first viewing area of each display unit 301 in the first viewing area.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.

Claims (30)

1. a driving method for touch control display apparatus, is characterized in that, this touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display, and this driving method comprises:
Store the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value;
Store and there is the display unit of different relative position relation to the weighing factor of touch control unit Detection capacitance value from touch control unit;
Apply gray scale voltage to each display unit, carry out image display to drive described touch control display apparatus;
According to the gray scale voltage being applied to each display unit, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit;
According to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage;
Drive described touch display unit to carry out touch sensible, revise according to the measured value of modifying factor to touch sensible that current display image obtains.
2. driving method according to claim 1, is characterized in that, stores the step of different gray scale voltage to the influence coefficient of touch control unit Detection capacitance value and comprises:
Apply gray scale voltage frame by frame to all display units of touch control display apparatus, wherein, for same frame, apply same gray scale voltage to all display units, for different frame, apply different gray scale voltages to all display units;
Apply gray scale voltage in the step of all display units at every frame, all detect the Detection capacitance value being positioned at the touch control unit of touch control display apparatus center, to obtain the touch control unit Detection capacitance value corresponding from different gray scale voltage;
Using touch control unit Detection capacitance value corresponding to a preset gray scale voltage as reference capacitance value, the relation of the touch control unit Detection capacitance value corresponding based on different gray scale voltage and described reference capacitance value, obtains the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value.
3. driving method according to claim 2, it is characterized in that, store the method for different gray scale voltage to the influence coefficient of touch control unit Detection capacitance value also to comprise: after the different gray scale voltage of acquisition is to the influence coefficient of touch control unit Detection capacitance value, generate the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage, store described look-up table.
4. driving method according to claim 1, is characterized in that, described multiple display unit is arranged in array, and stores the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation and comprises:
Region dividing is carried out to array of display cells, using the central point of touch control unit as inspection center, choose described inspection center just to the display unit of position as center display unit, centered by described center display unit, delimit the first reference zone comprising one or more display unit, first gray scale voltage is applied to the display unit in described first reference zone, second gray scale voltage is applied to all the other display units outside the first reference zone, touch control capacitance detection is carried out to touch control unit, to obtain the touch control unit Detection capacitance value that will now measure, and as the first Detection capacitance value,
Centered by described center display unit, delimit the second reference zone comprising multiple display unit, the second reference zone is made to comprise described first reference zone, the quantity of the display unit in described second reference zone is greater than the quantity of the display unit in the first reference zone, first gray scale voltage is applied to the display unit in described second reference zone, second gray scale voltage is applied to all the other display units outside the second reference zone, touch control capacitance detection is carried out to touch control unit, using the touch control unit Detection capacitance value now measured as the second Detection capacitance value;
Bring the first Detection capacitance value and the second Detection capacitance value into weight equation, the weighing factor using the numerical value obtained as the multiple display units within the second reference zone and outside the first reference zone.
5. driving method according to claim 4, it is characterized in that, store the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation also to comprise: record the first gray scale voltage, the influence coefficient that described first gray scale voltage is corresponding is maximum, record the second gray scale voltage, the influence coefficient that described second gray scale voltage is corresponding is minimum.
6. driving method according to claim 5, it is characterized in that, bring the first Detection capacitance value and the second Detection capacitance value into weight equation, the step using the numerical value obtained as the weighing factor of the multiple display units within the second reference zone and outside the first reference zone also comprises:
Using the area of the first reference zone as the first parameter;
Using the area of the second reference zone as the second parameter;
Second gray scale voltage is applied to all display units of touch control display apparatus, using the touch control unit Detection capacitance value now measured as tri-consult volume;
First gray scale voltage is applied to all display units of touch control display apparatus, using the touch control unit Detection capacitance value now measured as the 4th parameter;
Bring described first parameter, the second parameter, tri-consult volume, the 4th parameter, the first Detection capacitance value and the second Detection capacitance value into described weight equation in the lump.
7. driving method according to claim 6, is characterized in that, described weight equation is:
y＝(C2-C1)/[(Cmax-Cmin)*(area2-area1)]，
Wherein, y is weighing factor, and C2 is the second Detection capacitance value, and C1 is the first Detection capacitance value, and Cmax is the 4th parameter, and Cmin is tri-consult volume, and area2 is the second parameter, and area1 is the first parameter.
8. driving method according to claim 4, is characterized in that, stores the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation and also comprises:
By repeatedly delimiting the first reference zone and the second reference zone, obtain the step of the first Detection capacitance value and the second Detection capacitance value, wherein each second reference zone of delimiting is as first reference zone of delimiting next time, bring the first Detection capacitance value at every turn obtained and the second Detection capacitance value into weight equation, after obtaining each delimitation the first reference zone and the second reference zone, the weighing factor of the multiple display units within the second reference zone and outside the first reference zone.
9. driving method according to claim 4, is characterized in that, delimit the first reference zone, the step of the second reference zone comprises: make the shape of described first reference zone, the second reference zone and the mating shapes of described touch control unit.
10. driving method according to claim 9, it is characterized in that, the shape of described touch control unit is rectangle, described first reference zone, the second reference zone are centered by described center display unit, comprise the referential array of multiple display unit, line number and the columns of described referential array are equal.
11. driving methods according to claim 9, it is characterized in that, the shape of described touch control unit is circular, described first reference zone, the second reference zone are centered by described center display unit, comprise the display unit set of multiple display unit, the outermost multiple display unit of described display unit set is equal to the distance of center display unit.
12. driving methods according to claim 4, is characterized in that, store the step of display unit to the weighing factor of touch control unit Detection capacitance value from touch control unit with different relative position relation and also comprise:
Based on described weighing factor, Region dividing is carried out to display unit, set up the sample area that each touch control unit is corresponding, the weighing factor of display unit to touch control unit being positioned at described sample area is more than or equal to and is positioned at the weighing factor of the display unit outside described sample area to touch control unit;
Store display unit in sample area corresponding to each touch control unit and sample area to the weighing factor of touch control unit.
13. driving methods according to claim 12, is characterized in that, carry out Region dividing based on described weighing factor to display unit, and the step setting up sample area corresponding to each touch control unit comprises:
Repeatedly delimit the step of the first reference zone and the second reference zone, wherein each second reference zone of delimiting is as first reference zone of delimiting next time;
Using the first reference zone area of delimiting at every turn as the first parameter;
Using the second reference zone area of delimiting at every turn as the second parameter;
Each delimit the first reference zone and the second reference zone after, obtain the first Detection capacitance value and the second Detection capacitance value, by the difference of the first Detection capacitance value and the second Detection capacitance value divided by the first Detection capacitance value, the value of acquisition is as the 5th parameter;
Using the first parameter to the variable quantity of the second parameter and the ratio of the second parameter as the 6th parameter;
6th parameter is multiplied with a predetermined coefficient, obtains the 7th parameter;
When the 5th parameter is less than or equal to the 7th parameter, using the second current reference zone as sample area.
14. driving methods according to claim 1, is characterized in that, described display unit comprises: red sub-pixel unit, green sub-pixels unit, blue subpixels unit;
Described basis is applied to the gray scale voltage of each display unit, and the step obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit comprises:
Obtain the influence coefficient that on red sub-pixel unit, green sub-pixels unit, blue subpixels unit, each gray scale voltage is corresponding respectively;
Obtain the mean value of red sub-pixel unit, green sub-pixels unit, the corresponding influence coefficient of blue subpixels unit, using described mean value as display unit to the influence coefficient of touch control unit Detection capacitance value.
15. driving methods according to claim 1, it is characterized in that, described basis is applied to the gray scale voltage of each display unit, the step obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit comprises: complete in a two field picture display when touch control display apparatus carries out image display, before the display of another two field picture, according to the gray scale voltage being applied to each display unit, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit.
16. driving methods according to claim 1, is characterized in that, described touch control display apparatus comprises the first viewing area and the second viewing area;
Apply gray scale voltage to each display unit, comprise with the step driving described touch control display apparatus to carry out image display: in the first viewing area display unit charging complete carry out image display time, apply each display unit of gray scale voltage to the second viewing area, carry out image display to drive the second viewing area;
Described basis is applied to the gray scale voltage of each display unit, the step obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit comprises: according to the gray scale voltage being applied to each display unit in the first viewing area, obtains the current influence coefficient to touch control unit Detection capacitance value of each display unit in the first viewing area.
The driving circuit of 17. 1 kinds of touch control display apparatus, is characterized in that, this touch control display apparatus comprises the multiple touch control unit for realizing touch-control sensing and the multiple display units for realizing image display, and described driving circuit comprises:
Driver module, carries out touch sensible for driving described touch display unit;
Display module, for applying gray scale voltage to each display unit, carries out image display to drive described touch control display apparatus;
Analysis module, for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value, and store there is from touch control unit different relative position relation display unit to the weighing factor of touch control unit Detection capacitance value;
Described analysis module is also applied to the gray scale voltage of each display unit for basis, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit, according to obtained influence coefficient and with stored weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and revise according to the measured value of modifying factor to the touch sensible that driver module obtains that current display image obtains.
18. driving circuits according to claim 17, is characterized in that, described analysis module comprises:
First memory module, for storing the influence coefficient of different gray scale voltage to touch control unit Detection capacitance value;
Second memory module, for store there is from touch control unit different relative position relation display unit to the weighing factor of touch control unit Detection capacitance value;
Correcting module, with described driver module, display module, first memory module is connected with the second memory module, for being applied to the gray scale voltage of each display unit according to display module, gray scale voltage is obtained to the influence coefficient of touch control unit Detection capacitance value from described first memory module, and obtain the weighing factor of each display unit to touch control unit Detection capacitance value from described second memory module, according to obtained influence coefficient and weighing factor, obtain the modifying factor that each touch control unit Detection capacitance value affects by described gray scale voltage, and according to the modifying factor that current display image obtains, the Detection capacitance value that driver module obtains is revised.
19. driving circuits according to claim 18, is characterized in that, described first memory module is for storing the look-up table comprising each gray scale voltage and the influence coefficient corresponding with described gray scale voltage.
20. driving circuits according to claim 18, it is characterized in that, each touch control unit is corresponding with the sample area be made up of multiple display unit, and the weighing factor of display unit to touch control unit being positioned at described sample area is more than or equal to and is positioned at the weighing factor of the display unit outside described sample area to touch control unit;
Described second memory module is for storing the weighing factor of the display unit in described sample area to touch control unit.
21. driving circuits according to claim 18, it is characterized in that, described correcting module is applied to the gray scale voltage of the display unit in sample area for obtaining driver module, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit in sample area by the first memory module, the current influence coefficient to touch control unit Detection capacitance value of each display unit forms the first matrix;
Described correcting module is also for obtaining the weighing factor of the display unit in described sample area to touch control unit by described second memory module, and the weighing factor of the display unit in described sample area to touch control unit forms the second matrix;
Each influence coefficient in described first matrix can be multiplied with the weighing factor of influence coefficient co-located with the second matrix by described correcting module, obtain the 3rd matrix be made up of multiple correction factor, in described 3rd matrix, numerical value sum is as modifying factor.
22. driving circuits according to claim 17, it is characterized in that, described analysis module is used for when driver module drives described touch display unit to carry out touch sensible, the measured value of the touch sensible of each touch control unit obtained by driver module and modifying factor are brought electric capacity into and are repaired equation, obtain capacitance after the correction of each touch control unit, to revise rear capacitance as actual touch detected value.
23. driving circuits according to claim 17, it is characterized in that, described analysis module is used for when touch control display apparatus carries out image display complete in a two field picture display, before the display of another two field picture, according to the gray scale voltage being applied to each display unit, obtain the current influence coefficient to touch control unit Detection capacitance value of each display unit.
24. driving circuits according to claim 17, is characterized in that, described touch control display apparatus comprises the first viewing area and the second viewing area;
When described display module carries out image display for the charging of display unit in the first viewing area is complete, apply each display unit of gray scale voltage to the second viewing area, carry out image display to drive the second viewing area;
Described analysis module is used for, according to the gray scale voltage being applied to each display unit in the first viewing area, obtaining the current influence coefficient to touch control unit Detection capacitance value of each display unit in the first viewing area.
25. driving circuits according to claim 17, is characterized in that, described driver module, display module and described analysis module are integrated in a touch display chip.
26. driving circuits according to claim 17, is characterized in that, described driver module and described analysis module are integrated in a touch chip, and described display module is arranged at a display chip.
27. 1 kinds of touch control display apparatus, is characterized in that, comprising:
For realizing multiple touch control unit of touch-control sensing and the multiple display units for realizing image display;
The driving circuit of the touch control display apparatus as described in claim 17 ~ 26 any one, and the driving circuit of described touch control display apparatus is connected with multiple display unit with described multiple touch control unit, the driving circuit of described touch control display apparatus is for detecting the touch control unit Detection capacitance value of described multiple touch control unit.
28. touch control display apparatus according to claim 27, it is characterized in that, the liquid crystal layer that described touch control display apparatus also comprises first substrate, second substrate and is arranged between first substrate, second substrate, described display unit comprises the pixel electrode be arranged on described first substrate, and described touch control unit comprises the touch detecting electrode be arranged on described first substrate.
29. touch control display apparatus according to claim 28, is characterized in that, described first substrate is provided with public electrode, and described public electrode is used as the touch detecting electrode of described touch control unit.
30. touch control display apparatus according to claim 28, is characterized in that, described touch control unit Detection capacitance value is the measured value of capacitance between the touch detecting electrode of described touch control unit and ground are held.
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