CN102455532B - Liquid crystal indicator touch detection unit, touch sensitive display unit and detection method - Google Patents
Liquid crystal indicator touch detection unit, touch sensitive display unit and detection method Download PDFInfo
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- CN102455532B CN102455532B CN201010519907.0A CN201010519907A CN102455532B CN 102455532 B CN102455532 B CN 102455532B CN 201010519907 A CN201010519907 A CN 201010519907A CN 102455532 B CN102455532 B CN 102455532B
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Abstract
The invention provides a kind of touch detection unit being integrated in liquid crystal indicator inside, comprising: signal transmssion line, the first film transistor, touch terminal, detection terminal and detection signal receiving trap; The sweep trace cross arrangement of described signal transmssion line and liquid crystal indicator; The described grid of the first film transistor is connected with the sweep trace of liquid crystal indicator, and source electrode is connected with signal transmssion line, and drain electrode is connected with touch terminal; Described detection terminal is connected with detection signal receiving trap, and is oppositely arranged with described touch terminal.The present invention also provides a kind of touch display unit and the detection method thereof that include described touch detection unit, and includes the liquid crystal indicator of described touch detection unit.The present invention, by being integrated in liquid crystal indicator by touch detection unit, reduces the thickness being integrated with the liquid crystal indicator of touching device, solves the problem that liquid crystal indicator brightness declines simultaneously.
Description
Technical field
The present invention relates to liquid crystal display touch sensible input media, particularly the touch detection unit of coplane conversion type liquid crystal display device, touch sensitive display unit and detection method.
Background technology
Due to developing rapidly of technology today, portable electronic devices also becomes one of electronic product that modern relies on gradually.Generally speaking, as PDA (PersonalDigitalAssistant) mobile phone is all attached with the function of touch panel (touchpanel) now, allow user can carry out direct control PDA mobile phone through pointer or finger thus.But, contact panel due to existing PDA mobile phone be generally superposed with touch panel by display (as Thin Film Transistor-LCD or Thin Film Transistor (TFT)) the push type contact panel that forms, the contact panel that this mode is made will cause the brightness of display to reduce and the shortcoming such as thickness that increases original display produces.
Fig. 1 is the contact panel of prior art, is mainly divided into two parts: touch-screen 01 and liquid crystal indicator 02.Wherein, touch-screen 01 includes upper substrate 03 and infrabasal plate 05, and upper substrate 03 and infrabasal plate 05 are pasted together by bonding agent 04, are then combined on liquid crystal indicator 02 by touch-screen 01 integral plaster.
Described liquid crystal indicator 02 includes upper substrate 06 and lower glass substrate 07, comprises the insulating medium layer between the data line for controlling display, sweep trace, pixel electrode and each metal level, Thin-film deposition in lower glass substrate 07.As shown in Figure 1, if 08 place produce have pressing, will touch-screen upper substrate 03 be made to contact conducting with the transparency electrode on infrabasal plate 05, so detect this place direction voltage, to judge touch location.Because prior art is that liquid crystal indicator to superpose with touch panel and formed, the shortcoming such as the brightness decline of liquid crystal indicator and the increase of thickness can be caused like this.
Fig. 2 is the structural representation of coplane conversion type (In-PlaneSwitching, IPS) liquid crystal indicator in prior art.As shown in Figure 2, be different from twisted nematic (TwistedNematic, TN) two electrodes of liquid crystal indicator are respectively at upper and lower two substrates, and electric field is formed between upper and lower base plate, two electrode 16A and 16B of IPS liquid crystal indicator are positioned on array base palte 14B, color membrane substrates 14A is upper substrate, and polaroid 10,12 sticks the outside in array base palte 14B and color membrane substrates 14A respectively.All liquid crystal molecules are all arranged in parallel with array base palte 14B, electrode 16A, 16B respectively making alive form electric field, under the effect of electric field, the direction parallel with array base palte 14B deflects by liquid crystal molecule, and such arrangement substantially increases the visual angle of liquid crystal display device.
In addition, the touch detecting apparatus of current discovery coplane conversion type liquid crystal display liquid-crystal apparatus, be the surface directly touch panel being attached to display device by the mode of laminating, also do not find inside touch detecting apparatus being integrated in coplane conversion type liquid crystal display device.
Summary of the invention
The invention provides a kind of touch detection unit, touch sensitive display unit and the detection method thereof that are integrated in coplane conversion type liquid crystal display device, to solve in prior art, touch panel is directly fitted in coplane conversion type liquid crystal display device surface, causes the problem such as brightness decline and thickness increase.
The invention provides a kind of touch detection unit being integrated in liquid crystal indicator inside, comprising:
Signal transmssion line, the first film transistor, touch terminal, detection terminal and detection signal receiving trap;
The sweep trace cross arrangement of described signal transmssion line and liquid crystal indicator;
The described grid of the first film transistor is connected with the sweep trace of liquid crystal indicator, and source electrode is connected with signal transmssion line, and drain electrode is connected with touch terminal;
Described detection terminal is connected with detection signal receiving trap, and is oppositely arranged with described touch terminal.
Optionally, the data line of described signal transmssion line and liquid crystal indicator is same layer metal.
Optionally, the top of described touch terminal is also provided with the first transparency electrode be connected electrically.
Optionally, described detection terminal is made up of pillar and conductive layer, and described conductive layer is wrapped in the outside of pillar.
Optionally, under stressing conditions, described touch terminal and detection terminal electrical connection, and described detection terminal receives the signal touching terminal transmission.
Optionally, described signal transmssion line, the first film transistor, touch terminal are positioned on the array base palte of liquid crystal indicator, and described detection terminal is positioned on the color membrane substrates of described liquid crystal indicator.
The present invention also provides a kind of touch sensitive display unit of touch detection unit, also comprises pixel cell; Described pixel cell comprises the second thin film transistor (TFT), and the grid of described second thin film transistor (TFT) connects sweep trace, and the described source electrode of the second thin film transistor (TFT) is connected with the data line of liquid crystal indicator.
Optionally, the sweep trace that the described sweep trace be connected with the second thin-film transistor gate is connected with the first film transistor gate of touch detection unit is same scan line.
Optionally, the sweep trace that is connected with the first film transistor gate of touch detection unit of the described sweep trace be connected with the second thin-film transistor gate is adjacent.
Optionally, also comprise above public electrode and signal transmssion line and equipotential with public electrode the second transparency electrode, to be positioned at above pixel electrode and three transparency electrode equipotential with pixel electrode.
Optionally, described pixel electrode is divided into the first pixel electrode and the second pixel electrode that are electrically connected to each other, lays respectively at the both sides of signal transmssion line and disconnects with signal transmssion line infall.
Optionally, described first pixel electrode and the second pixel electrode are electrically connected by the 3rd transparency electrode of the side of being located thereon.
Optionally, also the 3rd transparency electrode is provided with above the drain electrode of described second thin film transistor (TFT), above the drain electrode of the second thin film transistor (TFT) and the top of the second pixel electrode is provided with via hole, the drain electrode of described second thin film transistor (TFT) and the second pixel electrode are electrically connected with the 3rd transparency electrode by the via hole be located thereon, and are electrically connected to each other by the 3rd transparency electrode.
Optionally, the top of the first pixel electrode is also provided with via hole and is electrically connected with the 3rd transparency electrode, the 3rd transparency electrode electrical connection by being located thereon of the drain electrode of described second thin film transistor (TFT), the first pixel electrode and the second pixel electrode.
Optionally, described first pixel electrode and the second pixel electrode are strip, waveform or serrate, arrange in the direction with described Signal transmissions line parallel.
Optionally, described public electrode is divided into the first public electrode and second public electrode of electrical connection mutually, described first public electrode is positioned at the first pixel electrode away from the second pixel electrode side, and described second public electrode is positioned at the second pixel electrode away from the first pixel electrode side.
Optionally, described first public electrode and the second public electrode are strip, waveform or serrate, arrange in the direction with Signal transmissions line parallel.
Optionally, also comprise the 3rd public electrode be connected with described first public electrode, the second public electrode, described 3rd public electrode to be positioned at below pixel electrode and with its insulation, for the formation of the memory capacitance of pixel.
The present invention also provides a kind of liquid crystal indicator comprising described touch sensitive display unit.
The present invention also provides a kind of detection method of described touch detection unit, comprising:
To be lined by line scan touch detection unit by the scan signal line be connected with touch detection unit, the grid namely to described the first film transistor applies voltage, can judge the position of X-direction;
Simultaneously by the signal transmssion line of touch detection unit, provide required voltage to the source electrode of described the first film transistor;
Reference voltage is provided to detection signal receiving trap; When finger presses touch detection unit, described detection terminal is electrically connected with described touch terminal, then the voltage of the first film transistor source is transferred to by the first film transistor drain and touches terminal, detection terminal and detection signal receiving trap; By checking the change in voltage of detection signal receiving trap, determine the position touching Y-direction.
Optionally, carry out scanning element unit and touch detection unit line by line by sweep trace, namely provide voltage to open described the first film transistor and the second thin film transistor (TFT) successively to described the first film transistor gate and the second thin-film transistor gate;
By described signal transmssion line, provide detection voltage to the first film transistor source of described touch detection unit; By data line, provide display voltage to the second thin film transistor (TFT) source electrode of described pixel cell;
Reference voltage is provided to detection signal receiving trap; When wherein one or more touch detection unit of touch display unit described in finger presses, described detection terminal is electrically connected with described touch terminal, then the voltage of the first film transistor source is through detection terminal transmission detection signal receiving trap; By checking the change in voltage of detection signal receiving trap, determine the position touched.
Compared with prior art, the present invention has the following advantages: by being integrated in liquid crystal indicator by described touch detection unit, reduce the thickness being integrated with the coplane conversion type liquid crystal display device of touching device, solve the problem that liquid crystal indicator brightness declines simultaneously.Signal transmssion line can be used for transmitting touch signal, as the metal that is in the light of the 3rd transparency electrode of coplane conversion type liquid crystal display device, can improve the aperture opening ratio of pixel simultaneously.
Accompanying drawing explanation
Fig. 1 is the liquid crystal indicator that prior art is integrated with touching device.
Fig. 2 is the structural representation of prior art coplane conversion type liquid crystal display device.
Fig. 3 is the partial array circuit diagram of coplane conversion type touch detection unit.
Fig. 4 most Fig. 8 is the structural representation of inventive touch display unit.
Fig. 9, Figure 10 and Figure 11 are the partial array circuit diagram of the touch display unit of the present invention's three embodiments.
Figure 12 to Figure 27 is that the applicable voltage range of inventive touch display device detects schematic diagram.
Specific implementation method
The present invention proposes a kind of touch detection unit showing display panels with coplane conversion type and integrate.For a better understanding of the present invention, be described in detail as follows.
As shown in Figure 3, for the present invention is integrated in the partial array circuit diagram of the touch detection unit of coplane conversion type liquid crystal display device inside, described touch detection unit comprises signal transmssion line 103a, the first film transistor 001.
Particularly, described touch detection unit includes the first film transistor 001, the grid of described the first film transistor 001 is connected with the sweep trace 101b of liquid crystal indicator, the source electrode of described the first film transistor 001 is connected with signal transmssion line 103a, and the drain electrode of described the first film transistor 001 touches terminal (not shown) for connecting.
The present invention also provides a kind of touch sensitive display unit, as shown in Figure 3, described touch sensitive display unit is made up of touch detection unit as above and pixel cell, pixel cell comprises the second thin film transistor (TFT) 002, the grid of the second thin film transistor (TFT) 002 connects sweep trace 101a, the source electrode connection data line 102 of the second thin film transistor (TFT) 002.Described sweep trace 101a is adjacent with sweep trace 101b.
Originally the sweep trace connected from the grid of described the first film transistor 001 illustrated and be different sweep traces with the sweep trace of the connection of the grid of described second thin film transistor (TFT) 002, as other embodiments, also can be same sweep trace.
Touch detection unit provided by the invention is integrated in coplane conversion type liquid crystal display device inside, and is combined to form touch sensitive display unit with pixel cell.The following detailed description of the structure of touch sensitive display unit.
Fig. 4 to Fig. 8 is the structural drawing of the coplane conversion type liquid crystal display device touch sensitive display unit of the present invention of Fig. 3, and composition graphs 4 elaborates to Fig. 8 to the structure that the present invention is integrated in the inner touch sensitive display unit of coplane conversion type liquid crystal display device.
With reference to the structure vertical view that figure 4, Fig. 4 is inventive touch display unit.Described touch sensitive display unit comprises touch detection unit and pixel cell.
Described touch detection unit include be positioned at liquid crystal indicator array base palte (not shown on figure) on the first film transistor 001, the grid 15 of the first film transistor 001 is connected to the sweep trace 101b of liquid crystal indicator, source electrode 14 is connected to signal transmssion line 103a, and drain electrode 16 is connected to and touches terminal 106.Signal transmssion line 103a is not only used for transmitting touch signal, can also be used as the metal that is in the light of common transparent electrode, improves the aperture opening ratio of pixel.
Be simultaneously the cross section structure figure in B1-B2 direction in Fig. 4 with reference to figure 7, Fig. 7, also comprise be positioned on liquid crystal indicator color membrane substrates 113 with the detection terminal 110 touching terminal 106 and be oppositely arranged, described detection terminal 110 with detect receiving trap and be connected.Detection terminal 110 comprises pillar 111, be generally organic film material, on described pillar 111, contact covers conductive layer, as tin indium oxide or zinc paste, it can also be the material that other resistivity is lower, such as aluminium, copper etc., can reduce in transmitting procedure the decay touching detection signal like this, improves the accuracy of touch location determination.On described pillar 111, contact covering conductive metallic material is electrically connected with touch detection line 112.
As preferred embodiment, touching terminal 106 is not directly contact with detection terminal 110, and the top touching terminal 106 is also provided with one deck first transparency electrode 106-1, and the material of described first transparency electrode 106-1 can be tin indium oxide etc.First transparency electrode 106-1 is electrically connected with touch terminal 106, and is electrically connected with the drain electrode 16 of the first film transistor 001 by via hole 106-2.Can prevent the first transparency electrode 106-1 from causing Signal transmissions bad with the contact problems and via hole 106-2 touching terminal 106 with the contact problems touching terminal 16 like this.
When the sweep trace 101b by being connected with the first film transistor 001 grid 15 applies voltage to described the first film transistor 001, the touch location of X-direction can be judged; There is provided required voltage by the source electrode 14 of signal transmssion line 103a to described the first film transistor 001,16 voltage to be provided to by draining and to touch terminal 106, the detection signal receiving trap to color membrane substrates 113 provides reference voltage simultaneously; When finger presses liquid crystal indicator, described detection terminal 110 is electrically connected with described touch terminal 106, then the voltage transmission of the source electrode 14 of the first film transistor 001 is to detection signal receiving trap; By the change in voltage of test detection signal receiving trap, the position of the touch of Y-direction just can be determined.It is exactly more than the detection method of inventive touch detecting unit.
Touch sensitive display unit of the present invention also comprises pixel cell, and described pixel cell is coplane conversion type pixel cell.With reference to figure 4, described pixel cell comprises the second thin film transistor (TFT) 002, the grid 10 of described second thin film transistor (TFT) 002 is connected to the sweep trace 101a of liquid crystal indicator, source electrode 11 is connected to data line 102a, described data line 102a is adjacent with signal transmssion line 103a, drain electrode 12 is connected to pixel electrode, also comprise public electrode in addition, be positioned at above public electrode and signal transmssion line 103a and equipotential with public electrode the second transparency electrode 105, to be positioned at above pixel electrode and three transparency electrode 109 equipotential with pixel electrode, the material of described second transparency electrode 105 and the 3rd transparency electrode 109 is tin indium oxide or zinc paste.
Particularly, described pixel electrode comprises the first pixel electrode 107, second pixel electrode 108, described first pixel electrode 107 and the second pixel electrode 108 are strip in the present embodiment, alternatively, the shape of described first pixel electrode 107 and the second pixel electrode 108 also can be waveform, serrate etc.First pixel electrode 107 and the second pixel electrode 108 lay respectively at the both sides of signal transmssion line 103a, and are that signal transmssion line 103a intersection disconnects (A, B two place as in Fig. 5), and arrange on the direction parallel with signal transmssion line 103a.Described first pixel electrode 107 and the second pixel electrode 108 and data line 102a are same layer metal.
Described public electrode comprises the first public electrode 104-1 and the second public electrode 104-3 of electrical connection mutually, the shape of described first public electrode 104-1 and the second public electrode 104-3 is strip in the present embodiment, alternatively, the shape of the first public electrode 104-1 and the second public electrode 104-3 also can be waveform, serrate etc.Described first public electrode 104-1 is arranged on the direction parallel with signal transmssion line 103a with the second public electrode 104-3, the first concrete public electrode 104-1 is positioned at the side of the first pixel electrode 107 away from the second pixel electrode 108, and the second public electrode 104-3 is positioned at the side of the second pixel electrode 108 away from the first pixel electrode 107.Described first public electrode 104-1 and the second public electrode 104-3 and sweep trace 101a is same layer metal.
Describedly be positioned at above the first public electrode 104-1, signal transmssion line 103a, the second public electrode 104-3 and equipotential with the first public electrode 104-1, the second public electrode 104-3 the second transparency electrode 105, be positioned at above the first pixel electrode 107 and the second pixel electrode 108 and equipotential 3rd transparency electrode 109 together form the face internal electric field of coplane conversion type liquid crystal display device with it.
In the present embodiment, the described grid 10 of the second thin film transistor (TFT) 002 and the grid 15 of the first film transistor 001 are connected to different sweep trace 101a, 101b, and described sweep trace 101a, 101b are adjacent.As other embodiments, the described grid 10 of the second thin film transistor (TFT) 002 and the grid 15 of the first film transistor 001 can be connected to same sweep trace.
With reference to the cross section structure figure that figure 4 and Fig. 5, Fig. 5 are A1-A2 direction in Fig. 4, as preferred embodiment, also comprise the 3rd public electrode 104-2 be positioned at below part first pixel electrode 107 and the second pixel electrode 108.The first insulating medium layer 121 is also provided with between described first pixel electrode 107, second pixel electrode 108 and the 3rd public electrode 104-2, described 3rd public electrode 104-2 and the first pixel electrode 107 form the first pixel capacitance CS1, described 3rd public electrode 104-2 and the second pixel electrode 108 form the second pixel capacitance CS2, and described first pixel capacitance CS1 and the second pixel capacitance CS2 is parallel relationship.
Then with reference to figure 4 and Fig. 5, as specific embodiment, in order to keep the first pixel electrode 107 to be electrically connected with the second pixel electrode 108, then the first pixel electrode 107 and the second pixel electrode 108 are electrically connected by the 3rd transparency electrode 109 be also electrically connected with it be located thereon.The second insulating medium layer 122 is provided with above first pixel electrode 107 and the second pixel electrode 108, first pixel electrode 107 is directly connected with the drain electrode 12 of the second thin film transistor (TFT) 002, drain electrode 12 is electrically connected with the second transparency electrode 109 by the via hole 19a be located thereon by the via hole 13 that is located thereon and the second pixel electrode 108, thus 12, first pixel electrode 107, second pixel electrode 108 equipotential that drains.
Then with reference to figure 6, as preferred embodiment, first pixel electrode 107 is also electrically connected with the 3rd transparency electrode 109 by the via hole 19b of side disposed thereon, even if drain electrode 12 and described 3rd transparency electrode 109 described in Fig. 5 can not well be electrically connected also can ensure that display transfers to the second pixel electrode 108, thus reduction pixel shows abnormal probability.All the other structures in Fig. 6 and connect identical with in Fig. 5, no longer describe.
Fig. 8 be integrated with as shown in Figure 4 the outside vertical view of liquid crystal indicator of touch sensitive display unit, namely the plan view above described color membrane substrates, specifically comprise: black matrix 133 is the light tight place of pixel cell, for blocking the infringement that extraneous light is avoided internal components, and color blocking R, interference between G, B, metal wire is to the reflection etc. of light.Be positioned between described black matrix 133, be also formed with the part that may be used for printing opacity, the part correspondence of described printing opacity in the pixel cell in touch sensitive display unit for receiving the part of extraneous light.Between adjacent pixel cell, also be formed with ordered series of numbers touch detection unit, on the detection line 112 that illustrate only detection signal receiving trap in figure and detection terminal 110, user is by touching illustrated touch display unit, and detection terminal 110 contacts to confirm touch location with the first transparency electrode 106-1 above touch terminal 106 as shown in Figure 7.
Below in conjunction with the description of the above-mentioned touch sensitive display unit to described coplane conversion type liquid crystal display device, the testing process of the touch sensitive display unit of described coplane conversion type liquid crystal display device is described.With reference to figure 4, comprise: scanned successively by sweep trace 101a, 101b and choose corresponding pixel cell and touch detection unit, namely provide voltage to open successively described the first film transistor 001 and the second thin film transistor (TFT) 002 respectively successively to the grid 15 of described the first film transistor 001 and the grid 10 of the second thin film transistor (TFT), now can determine the touch location of X-direction, simultaneously by described signal transmssion line 103a, provide voltage to the source electrode 14 of the first film transistor 001 of described touch detection unit; And pass through the data line 102a of described pixel cell, provide display voltage to the source electrode 11 of the second thin film transistor (TFT) of described pixel cell; Simultaneously with reference to figure 7, provide reference voltage to the described detection signal receiving trap touching detection line 112 that comprises; When the color membrane substrates 113 of finger presses institute liquid crystal indicator, described detection terminal 110 is electrically connected with described touch terminal 106, then the voltage of the source electrode 14 of the first film transistor 001 transfers to detection terminal 110 through thin film transistor (TFT) 15, touch terminal 106, and transmit the detection signal receiving trap as correspondence by detection terminal 110, according to the change in voltage of detection signal receiving trap, just determine the position of the touch of Y-direction.
As shown in Figure 9, be first embodiment of the invention, comprise the circuit diagram of multiple touch sensitive display unit as above, described touch sensitive display unit is line-column matrix arrangement.Described touch sensitive display unit is line-column matrix arrangement.Described touch sensitive display unit 210 comprises pixel cell 211 and touch detection unit 212.In the present embodiment, only illustrate that described touch sensitive display unit 3 is formed with 3 row 3 and arranges.Further, described touch display unit can also be the touch sensitive display unit 210 of other numbers.
Originally the scan signal line illustrated is followed successively by 201a, 201b, 201c, 201d; The signal transmssion line of the pixel cell in touch sensitive display unit is followed successively by 202a, 202b, 202c; The signal transmssion line of touch detection unit is followed successively by 203a, 203b, 203c.
As shown in Figure 10, be second embodiment of the invention, include the circuit diagram of multiple touch sensitive display unit as above, comprising: multiple touch sensitive display unit and multiple independent pixel unit, described touch sensitive display unit is line-column matrix arrangement.Described touch sensitive display unit 310 comprises pixel cell 311 and touch detection unit 312.In the present embodiment, only illustrate that described touch sensitive display unit 310 is formed with 3 row 2 and arranges, and be also formed with independent pixel unit between described two row, and described independent pixel unit forms row, between two row touch sensitive display units.Further, described touch display unit can also be the touch sensitive display unit 310 of other numbers.
As other embodiments, described independent pixel unit can also optionally between adjacent rows touch sensitive display unit 310.
Originally the scan signal line illustrated is followed successively by 301a, 301b, 301c, 301d; The signal transmssion line of the pixel cell in touch sensitive display unit and independent pixel unit is followed successively by 302a, 302b, 302c; The signal transmssion line of touch detection unit is followed successively by 303a, 303b.
As other embodiments, the scan signal line of same touch sensitive display unit can not be positioned at same a line.As shown in figure 11, pixel cell 411 in same touch sensitive display unit 410 lays respectively at adjacent rows with the sweep trace of touch detection unit 412, namely the grid of described pixel cell 411 is connected to sweep trace 401a, and the grid of described touch detection unit 412 is connected to sweep trace 401b.
The present invention also provides a kind of liquid crystal indicator including described touch sensitive display unit or described touch display unit.With reference to the associated description of described touch sensitive display unit or touch display unit, just can not describe in detail particularly herein.
Described above is the structure of touch sensitive display unit and the device and the touch detecting method that include described touch sensitive display unit, then voltage analog is carried out to it, checking includes in the touch display unit of described touch sensitive display unit, whether described upper substrate touches and detects voltage can to the molecule in the pixel cell for showing, as liquid crystal molecule exists impact, and detect the voltage range be suitable for of described touch display unit.
Touch display unit provided by the invention such as adopts the form of row reversion, the voltage of concrete applying corresponds to respectively: provide voltage to described touch detection line 112, detection terminal 110 and touch both detection lines 112 are because being electrically connected, then there is identical voltage, be set to V1, i.e. V1=V112=V110;
Voltage V113 is provided to the signal transmssion line 103a of described touch detection unit;
There is provided voltage to public electrode, its high voltage appearance is Vcom-h=5V, and low-voltage is Vcom-l=0V;
There is provided voltage to described pixel cell, described voltage is Vpixel.
According to above-mentioned voltage presentation mode, the drive waveforms of described touch display unit as shown in figure 12, has following voltage value relation:
At voltage peak place, V1=V113=Vcom-h=5V;
At voltage dips place, V1=V113=Vcom-l=0V.
Below simulate respectively under white picture and black picture, whether the voltage touched on detection line 112 can affect the arrangement of liquid crystal molecule between 0-5V, each several part magnitude of voltage form as shown in fig. 13 that.Analog result is as follows:
Under black picture:
(1) V
com=0V, V
pixel=0V, V113=0V, V1=0V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 14;
(2) V
com=0V, V
pixel=0V, V113=0V, V1=5V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 15;
(3) V
com=5V, V
pixel=5V, V113=5V, V1=0V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 16;
(4) V
com=5V, V
pixel=5V, V113=5V, V1=5V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 17.
Conclusion: as can be seen from the figure, under black picture, the voltage touching detection line 112, when 0-5V changes, does not affect liquid crystal molecule distribution and penetrance waveform.
Mark in Figure 14 to 17 has problem: 112 and VITO indicate mistake, amended as Figure 14 to 17
Under white picture:
(1) V
com=0V, V
pixel=5V, V113=0V, V1=0V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 18;
(2) V
com=0V, V
pixel=5V, V113=0V, V1=5V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 19;
(3) V
com=5V, V
pixel=0V, V113=5V, V1=0V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 20;
(4) V
com=5V, V
pixel=0V, V113=5V, V1=5V, liquid crystal molecule arrangement and penetrance waveform are as shown in figure 21.
Conclusion: as can be seen from the figure, under white picture, the voltage touching detection line 112, when 0-5V changes, does not affect liquid crystal molecule distribution and penetrance waveform.Namely, in described touch display unit, the voltage range touching detection line 112 is 0 ~ 5V.
As can be seen from the result of above simulation, no matter at white picture or at black picture, the voltage touching detection line 112, when 0-5V changes, does not have impact to the liquid crystal molecule arrangement in described touch display unit.
As shown in figure 22, waveform when not touching is represented.Get V1=2.5V to simulate, the highest 5V that gets of V113 voltage, minimumly get 0V.
Simultaneously with reference to figure 7, when there being touch to occur, touching detection line 112 and contacting with the first transparency electrode 106-1, make the V1 change in voltage of touch detection line 112 as shown in figure 23, voltage waveform becomes the waveform of V1-1, is learnt the direction of touch location by the change in voltage detecting V1.Analog result is as Figure 24 to 27, and wherein, Figure 24 to Figure 25 is under being in black picture, and Figure 26 to Figure 27 is under being in white picture, and can find out, as V1=2.5V, touching to detect does not affect liquid crystal molecule distribution and penetrance waveform, is magnitude of voltage applicatory.
Although the present invention with preferred embodiment openly as above; but it is not for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; the Method and Technology content of above-mentioned announcement can be utilized to make possible variation and amendment to technical solution of the present invention; therefore; every content not departing from technical solution of the present invention; that does above embodiment according to technical spirit of the present invention appoints simple modification, equivalent variations and modification, all belongs to the protection domain of technical solution of the present invention.
Claims (20)
1. be integrated in a touch detection unit for liquid crystal indicator inside, it is characterized in that, comprising:
Signal transmssion line, the first film transistor, touch terminal, detection terminal and detection signal receiving trap;
The sweep trace cross arrangement of described signal transmssion line and liquid crystal indicator;
The described grid of the first film transistor is connected with the sweep trace of liquid crystal indicator, and source electrode is connected with signal transmssion line, and drain electrode is connected with touch terminal;
Described detection signal receiving trap comprises touch detection line;
Described detection terminal is connected with detection signal receiving trap, and is oppositely arranged with described touch terminal;
Described detection terminal comprises pillar, and on described pillar, contact covers conductive metallic material, and described conductive metallic material is electrically connected with described touch detection line;
Wherein, provide required voltage by the source electrode of described signal transmssion line to described the first film transistor, by described drain electrode, described voltage is provided to described touch terminal, provide reference voltage to described detection signal receiving trap.
2. touch detection unit as claimed in claim 1, is characterized in that: the data line of described signal transmssion line and liquid crystal indicator is same layer metal.
3. touch detection unit as claimed in claim 1, is characterized in that: the top of described touch terminal is also provided with the first transparency electrode be connected electrically.
4. touch detection unit as claimed in claim 1, is characterized in that: under stressing conditions, described touch terminal and detection terminal electrical connection, and described detection terminal receives the signal touching terminal transmission.
5. touch detection unit as claimed in claim 4, is characterized in that: described signal transmssion line, the first film transistor, touch terminal are positioned on the array base palte of liquid crystal indicator, and described detection terminal is positioned on the color membrane substrates of described liquid crystal indicator.
6. comprise a touch sensitive display unit for touch detection unit as claimed in claim 1, it is characterized in that: also comprise pixel cell; Described pixel cell comprises the second thin film transistor (TFT), and the grid of described second thin film transistor (TFT) connects sweep trace, and the described source electrode of the second thin film transistor (TFT) is connected with the data line of liquid crystal indicator.
7. touch sensitive display unit as claimed in claim 6, is characterized in that: the sweep trace that the described sweep trace be connected with the second thin-film transistor gate is connected with the first film transistor gate of touch detection unit is same scan line.
8. touch sensitive display unit as claimed in claim 6, is characterized in that: the sweep trace that the described sweep trace be connected with the second thin-film transistor gate is connected with the first film transistor gate of touch detection unit is adjacent.
9. touch sensitive display unit as claimed in claim 6, is characterized in that: also comprise above public electrode and signal transmssion line and equipotential with public electrode the second transparency electrode, to be positioned at above pixel electrode and three transparency electrode equipotential with pixel electrode.
10. touch sensitive display unit as claimed in claim 9, is characterized in that: described pixel electrode is divided into the first pixel electrode and the second pixel electrode that are electrically connected to each other, lays respectively at the both sides of signal transmssion line and disconnect with signal transmssion line infall.
11. touch sensitive display units as claimed in claim 10, is characterized in that: described first pixel electrode and the second pixel electrode are electrically connected by the 3rd transparency electrode of the side of being located thereon.
12. touch sensitive display units as claimed in claim 11, it is characterized in that: above the drain electrode of described second thin film transistor (TFT), be also provided with the 3rd transparency electrode, above the drain electrode of the second thin film transistor (TFT) and the top of the second pixel electrode is provided with via hole, the drain electrode of described second thin film transistor (TFT) and the second pixel electrode are electrically connected with the 3rd transparency electrode by the via hole be located thereon, and are electrically connected to each other by the 3rd transparency electrode.
13. touch sensitive display units as claimed in claim 12, it is characterized in that: the top of the first pixel electrode is also provided with via hole and is electrically connected with the 3rd transparency electrode, the 3rd transparency electrode electrical connection by being located thereon of the drain electrode of described second thin film transistor (TFT), the first pixel electrode and the second pixel electrode.
14. touch sensitive display units as claimed in claim 10, is characterized in that: described first pixel electrode and the second pixel electrode are strip, waveform or serrate, arrange in the direction with described Signal transmissions line parallel.
15. touch sensitive display units as claimed in claim 9, it is characterized in that: described public electrode is divided into the first public electrode and second public electrode of electrical connection mutually, described first public electrode is positioned at the first pixel electrode away from the second pixel electrode side, and described second public electrode is positioned at the second pixel electrode away from the first pixel electrode side.
16. touch sensitive display units as claimed in claim 15, is characterized in that: described first public electrode and the second public electrode are strip, waveform or serrate, arrange in the direction with Signal transmissions line parallel.
17. touch sensitive display units as claimed in claim 15, it is characterized in that: also comprise the 3rd public electrode be connected with described first public electrode, the second public electrode, described 3rd public electrode to be positioned at below pixel electrode and with its insulation, for the formation of the memory capacitance of pixel.
18. 1 kinds of liquid crystal indicators comprising the arbitrary described touch sensitive display unit of claim 6 to 17.
The detection method of 19. 1 kinds of touch detection units as claimed in claim 1, is characterized in that, comprising:
To be lined by line scan touch detection unit by the scan signal line be connected with touch detection unit, the grid namely to described the first film transistor applies voltage, can judge the position of X-direction;
Simultaneously by the signal transmssion line of touch detection unit, provide required voltage to the source electrode of described the first film transistor;
Reference voltage is provided to detection signal receiving trap; When finger presses touch detection unit, described detection terminal is electrically connected with described touch terminal, then the voltage of the first film transistor source is transferred to by the first film transistor drain and touches terminal, detection terminal and detection signal receiving trap; By checking the change in voltage of detection signal receiving trap, determine the position touching Y-direction.
The detection method of 20. 1 kinds of touch sensitive display units as claimed in claim 6, is characterized in that:
Carry out scanning element unit and touch detection unit line by line by sweep trace, namely provide voltage to open described the first film transistor and the second thin film transistor (TFT) successively to described the first film transistor gate and the second thin-film transistor gate;
By described signal transmssion line, provide detection voltage to the first film transistor source of described touch detection unit; By data line, provide display voltage to the second thin film transistor (TFT) source electrode of described pixel cell;
Reference voltage is provided to detection signal receiving trap; When wherein one or more touch detection unit of touch display unit described in finger presses, described detection terminal is electrically connected with described touch terminal, then the voltage of the first film transistor source is through detection terminal transmission detection signal receiving trap; By checking the change in voltage of detection signal receiving trap, determine the position touched.
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| CN103176658B (en) * | 2013-03-25 | 2015-12-02 | 南京中电熊猫液晶显示科技有限公司 | Mirror surface liquid crystal display and manufacture method thereof |
| CN103365521B (en) * | 2013-07-26 | 2016-09-07 | 京东方科技集团股份有限公司 | Capacitive touch screen |
| CN103676280B (en) | 2013-12-17 | 2016-10-12 | 合肥京东方光电科技有限公司 | Array base palte and manufacture method thereof and touch screen |
| CN106383609B (en) * | 2016-09-12 | 2019-10-22 | 北京小米移动软件有限公司 | Display panel and electronic equipment |
| CN108958523A (en) * | 2017-05-18 | 2018-12-07 | 京东方科技集团股份有限公司 | A kind of driving method of touch-control display panel, display device and touch-control display panel |
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