CN102455532A - Touch detection unit of liquid crystal display device, touch display unit and detection method - Google Patents
Touch detection unit of liquid crystal display device, touch display unit and detection method Download PDFInfo
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- CN102455532A CN102455532A CN2010105199070A CN201010519907A CN102455532A CN 102455532 A CN102455532 A CN 102455532A CN 2010105199070 A CN2010105199070 A CN 2010105199070A CN 201010519907 A CN201010519907 A CN 201010519907A CN 102455532 A CN102455532 A CN 102455532A
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Abstract
The invention provides a touch detection unit integrated in a liquid crystal display device, comprising: the touch screen comprises a signal transmission line, a first thin film transistor, a touch terminal, a detection terminal and a detection signal receiving device; the signal transmission lines and the scanning lines of the liquid crystal display device are arranged in a crossed manner; the grid electrode of the first thin film transistor is connected with a scanning line of the liquid crystal display device, the source electrode of the first thin film transistor is connected with a signal transmission line, and the drain electrode of the first thin film transistor is connected with a touch terminal; the detection terminal is connected with the detection signal receiving device and is arranged opposite to the touch terminal. The invention also provides a touch display device comprising the touch detection unit, a detection method thereof and a liquid crystal display device comprising the touch detection unit. The invention reduces the thickness of the liquid crystal display device integrated with the touch device by integrating the touch detection unit in the liquid crystal display device, and simultaneously solves the problem of the brightness reduction of the liquid crystal display device.
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
Because one of electronic product that technology rapid development now, portable electronic devices also become the modern gradually to be relied on.Generally speaking, like all additional function that touch panel (touch panel) arranged of PDA (Personal Digital Assistant) mobile phone now, let the user see through pointer thus or finger come direct control PDA mobile phone.Yet; Because the contact panel of existing P DA mobile phone generally is the push type contact panel that is made up of display (like Thin Film Transistor-LCD or TFT) and touch panel stack, the shortcomings such as thickness that the contact panel that this mode is made will cause the brightness of display to reduce and increase original display produce.
Fig. 1 is the contact panel of prior art, mainly is 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 sticks on through bonding agent 04 with infrabasal plate 05, then touch-screen 01 integral body is fitted on the liquid crystal indicator 02.
Said liquid crystal indicator 02 includes upper substrate 06 and lower glass substrate 07, comprises that the insulating medium layer, the thin film transistor (TFT) that are used to control between data presented line, sweep trace, pixel electrode and each metal level are deposited on lower glass substrate 07.As shown in Figure 1, at 08 place if produce and to push, with making touch-screen upper substrate 03 contact conducting with transparency electrode on the infrabasal plate 05, so detect this place direction voltage, with the judgement touch location.Constitute because prior art is liquid crystal indicator and touch panel stack, can cause the brightness decline of liquid crystal indicator and the shortcomings such as increase of thickness like this.
Fig. 2 is (In-Plane Switching, IPS) structural representation of liquid crystal indicator of coplane conversion type in the prior art.As shown in Figure 2; Be different from twisted nematic (Twisted Nematic; TN) two of liquid crystal indicator electrodes are respectively at two substrates up and down, and between upper and lower base plate, form electric field, and two the electrode 16A and the 16B of IPS liquid crystal indicator are positioned on the array base palte 14B; Color membrane substrates 14A is a upper substrate, and polaroid 10,12 sticks respectively in the outside of array base palte 14B and color membrane substrates 14A.All liquid crystal molecules all are to be arranged in parallel with array base palte 14B; Electrode 16A, 16B making alive respectively form electric field; Under effect of electric field, the direction deflection that liquid crystal molecule will be parallel with array base palte 14B, such arrangement has improved the visual angle of liquid crystal display device greatly.
In addition; Find the touch detecting apparatus of coplane conversion type liquid crystal display liquid-crystal apparatus at present; Be directly touch panel to be attached to the surface of display device through the mode of fitting, also do not find touch detecting apparatus is integrated in the inside of coplane conversion type liquid crystal display device.
Summary of the invention
The present invention provides a kind of touch detection unit, touch sensitive display unit and detection method thereof that is integrated in coplane conversion type liquid crystal display device; To solve in the prior art; Touch panel directly is fitted in the coplane conversion type liquid crystal display device surface, causes problems such as brightness decline and thickness increase.
The present invention provides a kind of inner touch detection unit of liquid crystal indicator that is integrated in, and comprising:
Signal transmssion line, the first film transistor, touch terminal, detection terminal and detection signal receiving trap;
The sweep trace cross arrangement of said signal transmssion line and liquid crystal indicator;
The sweep trace of transistorized grid of said the first film and liquid crystal indicator is connected, and source electrode is connected with signal transmssion line, and drain electrode is connected with the touch terminal;
Said detection terminal is connected with the detection signal receiving trap, and is oppositely arranged with said touch terminal.
Optional, the data line of said signal transmssion line and liquid crystal indicator is with one deck metal.
Optional, the top of said touch terminal also is provided with first transparency electrode that is electrically connected with it.
Optional, said detection terminal is made up of pillar and conductive layer, and said conductive layer is wrapped in the outside of pillar.
Optional, under stressing conditions, said touch terminal and detection terminal are electrically connected, and said detection terminal receives the signal that touches the terminal transmission.
Optional, said signal transmssion line, the first film transistor, touch terminal are positioned on the array base palte of liquid crystal indicator, and said detection terminal is positioned on the color membrane substrates of said liquid crystal indicator.
The present invention also provides a kind of touch sensitive display unit of touch detection unit, also comprises pixel cell; Said pixel cell comprises second thin film transistor (TFT), and the grid of said second thin film transistor (TFT) connects sweep trace, and the source electrode of said second thin film transistor (TFT) is connected with the data line of liquid crystal indicator.
Optional, the sweep trace that the said sweep trace that is connected with the second film crystal tube grid is connected with the first film transistor gate of touch detection unit is same sweep trace.
Optional, the said sweep trace that is connected with the second film crystal tube grid is adjacent with the sweep trace that the first film transistor gate of touch detection unit is connected.
Optional, also comprise public electrode and signal transmssion line top and with equipotential second transparency electrode of public electrode, be positioned at the pixel electrode top and with equipotential the 3rd transparency electrode of pixel electrode.
Optional, said pixel electrode is divided into first pixel electrode and second pixel electrode of mutual electrical connection, lays respectively at the both sides of signal transmssion line and breaks off with the signal transmssion line infall.
Optional, said first pixel electrode and second pixel electrode are electrically connected through the 3rd transparency electrode that is positioned at its top.
Optional; The drain electrode top of said second thin film transistor (TFT) also is provided with the 3rd transparency electrode; The drain electrode top of second thin film transistor (TFT) and the top of second pixel electrode are provided with via hole; The drain electrode of said second thin film transistor (TFT) and second pixel electrode are electrically connected with the 3rd transparency electrode through position via hole on it, and are electrically connected each other through the 3rd transparency electrode.
Optional, the top of first pixel electrode also is provided with via hole and is electrically connected with the 3rd transparency electrode, and the drain electrode of said second thin film transistor (TFT), first pixel electrode and second pixel electrode are electrically connected through position the 3rd transparency electrode on it.
Optional, said first pixel electrode and second pixel electrode are strip, waveform or serrate, in the direction setting parallel with said signal transmssion line.
Optional; Said public electrode is divided into first public electrode and second public electrode of mutual electrical connection; Said first public electrode is positioned at first pixel electrode away from second pixel electrode, one side, and said second public electrode is positioned at second pixel electrode away from first pixel electrode, one side.
Optional, said first public electrode and second public electrode are strip, waveform or serrate, in the direction setting parallel with signal transmssion line.
Optional, also comprise the 3rd public electrode that is connected with said first public electrode, second public electrode, said the 3rd public electrode be positioned at the pixel electrode below and with its insulation, be used to form the MM CAP of pixel.
The present invention also provides a kind of liquid crystal indicator that comprises said touch sensitive display unit.
The present invention also provides a kind of detection method of said touch detection unit, comprising:
Through the scan signal line that is connected with the touch detection unit touch detection unit of lining by line scan, promptly apply voltage to the transistorized grid of said the first film, can judge the position of directions X;
Through the signal transmssion line of touch detection unit, required voltage is provided simultaneously to the transistorized source electrode of said the first film;
To the detection signal receiving trap reference voltage is provided; When the finger presses touch detection unit, said detection terminal is electrically connected with said touch terminal, and then the voltage of the first film transistor source transfers to through the first film transistor drain and touches terminal, detection terminal and detection signal receiving trap; Through the change in voltage of inspection detection signal receiving trap, confirm to touch the position of Y direction.
Optional, carry out scanning element unit and touch detection unit line by line through sweep trace, promptly provide voltage to open the said the first film transistor and second thin film transistor (TFT) successively to the said the first film transistor gate and the second film crystal tube grid;
Through said signal transmssion line, detection voltage is provided to the first film transistor source of said touch detection unit; Through data line, display voltage is provided to the second thin film transistor (TFT) source electrode of said pixel cell;
To the detection signal receiving trap reference voltage is provided; When wherein one or more touch detection unit of the said touch display unit of finger presses, said detection terminal is electrically connected with said touch terminal, and then the voltage of the first film transistor source is through detection terminal transmission detection signal receiving trap; Through the change in voltage of inspection detection signal receiving trap, confirm the position that touches.
Compared with prior art; The present invention has the following advantages: through said touch detection unit is integrated in the liquid crystal indicator; Reduce to be integrated with the thickness of the coplane conversion type liquid crystal display device of touching device, solve the problem that liquid crystal indicator brightness descends simultaneously.Signal transmssion line can be used for transmitting touch signal, can improve aperture ratio of pixels as the metal that is in the light of the 3rd transparency electrode of coplane conversion type liquid crystal display device simultaneously.
Description of drawings
Fig. 1 is integrated with the liquid crystal indicator of touching device for prior art.
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 touch sensitive display unit of the present invention.
Fig. 9, Figure 10 and Figure 11 are the partial array circuit diagram of the touch display unit of three embodiment of the present invention.
Figure 12 to Figure 27 detects synoptic diagram for the suitable voltage range of touch display unit of the present invention.
The practical implementation method
The present invention proposes a kind of touch detection unit that integrates with coplane conversion type demonstration display panels.For a better understanding of the present invention, describe in detail as follows.
As shown in Figure 3, for the present invention is integrated in the partial array circuit diagram of the inner touch detection unit of coplane conversion type liquid crystal display device, said touch detection unit comprises signal transmssion line 103a, the first film transistor 001.
Particularly; Said touch detection unit includes the first film transistor 001; The grid of said the first film transistor 001 links to each other with the sweep trace 101b of liquid crystal indicator; The source electrode of said the first film transistor 001 links to each other with signal transmssion line 103a, and the drain electrode of said the first film transistor 001 is used for connecting touch terminal (not shown).
The present invention also provides a kind of touch sensitive display unit; As shown in Figure 3; Said touch sensitive display unit is made up of aforesaid touch detection unit and pixel cell; Pixel cell comprises that the grid of second thin film transistor (TFT), 002, the second thin film transistor (TFT) 002 connects sweep trace 101a, and the source electrode of second thin film transistor (TFT) 002 connects data line 102.Said sweep trace 101a is adjacent with sweep trace 101b.
The sweep trace that grid that originally illustrate and said the first film transistor 001 connects is different sweep traces with the sweep trace that is connected with the grid of said second thin film transistor (TFT) 002, and as other embodiment, also can be same sweep trace.
It is inner that touch detection unit provided by the invention is integrated in coplane conversion type liquid crystal display device, and combine to constitute touch sensitive display unit with pixel cell.Specify the structure of touch sensitive display unit below.
Fig. 4 is the structural drawing of the coplane conversion type liquid crystal display device touch sensitive display unit of the present invention of Fig. 3 to Fig. 8, the structure that the present invention is integrated in the inner touch sensitive display unit of coplane conversion type liquid crystal display device is elaborated to Fig. 8 in conjunction with Fig. 4.
With reference to figure 4, Fig. 4 is the structure vertical view of touch sensitive display unit of the present invention.Said touch sensitive display unit comprises touch detection unit and pixel cell.
Said touch detection unit includes the first film transistor 001 on the array base palte (not shown on the figure) that is positioned at liquid crystal indicator; 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 not only is used for transmitting touch signal, can also be used as the metal that is in the light of common transparent electrode, improves aperture ratio of pixels.
Simultaneously with reference to figure 7, Fig. 7 be the cross section structure figure of B1-B2 direction among Fig. 4, also comprise be positioned on the liquid crystal indicator color membrane substrates 113 with touch the detection terminal 110 that terminal 106 is oppositely arranged, said detection terminal 110 is connected with the detection receiving trap.Detection terminal 110 comprises pillar 111; Be generally organic film material, contact covers conductive layer on the said pillar 111, like tin indium oxide or zinc paste; Can also be the lower material of other resistivity; For example aluminium, copper etc. can reduce the decay that touches detection signal in the transmission course like this, improve the accuracy of touch location determination.Contact covering conductive metallic material is electrically connected with touch detection line 112 on the said pillar 111.
As preferred embodiment, touching terminal 106 is not directly to contact with detection terminal 110, and the top of touch terminal 106 also is provided with one deck first transparency electrode 106-1, and the material of the said first transparency electrode 106-1 can be for tin indium oxide etc.The first transparency electrode 106-1 is electrically connected with touching terminal 106, and is electrically connected with the drain electrode 16 of the first film transistor 001 through via hole 106-2.Can prevent that like this first transparency electrode 106-1 and contact problems that touch terminal 106 and via hole 106-2 from causing the signal transmission bad with the contact problems that touch terminal 16.
When through the sweep trace 101b that is connected with the first film transistor 001 grid 15 when said the first film transistor 001 applies voltage, can judge the touch location of directions X; To the source electrode 14 of said the first film transistor 001 required voltage is provided through signal transmssion line 103a simultaneously, 16 voltage is provided to touching terminal 106, reference voltage is provided to the detection signal receiving trap of color membrane substrates 113 through draining; When the finger presses liquid crystal indicator, said detection terminal 110 is electrically connected with said touch terminal 106, then voltage transmission to the detection signal receiving trap of the source electrode 14 of the first film transistor 001; Through the change in voltage of test detection signal receiving trap, just can confirm the position of the touch of Y direction.It more than is exactly the detection method of touch detection unit of the present invention.
Touch sensitive display unit of the present invention also comprises pixel cell, and said pixel cell is the coplane conversion type pixel cell.With reference to figure 4; Said pixel cell comprises second thin film transistor (TFT) 002; The grid 10 of said 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, and said data line 102a is adjacent with signal transmssion line 103a, and drain electrode 12 is connected to pixel electrode; Also comprise public electrode in addition, be positioned at public electrode and signal transmssion line 103a top and with equipotential second transparency electrode 105 of public electrode, be positioned at the pixel electrode top and with equipotential the 3rd transparency electrode 109 of pixel electrode, the material of said second transparency electrode 105 and the 3rd transparency electrode 109 is tin indium oxide or zinc paste.
Particularly; Said pixel electrode comprises first pixel electrode 107, second pixel electrode 108; Said first pixel electrode 107 and second pixel electrode 108 are strip in the present embodiment; Alternatively, the shape of said first pixel electrode 107 and second pixel electrode 108 also can be waveform, serrate etc.First pixel electrode 107 and second pixel electrode 108 lay respectively at the both sides of signal transmssion line 103a, and are that signal transmssion line 103a intersection breaks off (like the A among Fig. 5, B two places), and on the direction parallel with signal transmssion line 103a, are provided with.Said first pixel electrode 107 and second pixel electrode 108 are with one deck metal with data line 102a.
Said public electrode comprises the first public electrode 104-1 and the second public electrode 104-3 of mutual electrical connection; The shape of the said 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.The said first public electrode 104-1 is provided with 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 first pixel electrode 107 away from second pixel electrode 108, and the second public electrode 104-3 is positioned at the side of second pixel electrode 108 away from first pixel electrode 107.The said first public electrode 104-1 and the second public electrode 104-3 and sweep trace 101a are with one deck metal.
Said be positioned at the first public electrode 104-1, signal transmssion line 103a, second public electrode 104-3 top and with the first public electrode 104-1, equipotential second transparency electrode 105 of the second public electrode 104-3, be positioned at first pixel electrode 107 and second pixel electrode, 108 tops also equipotential with it the 3rd transparency electrode 109 formed the face internal electric field of coplane conversion type liquid crystal display device jointly.
In the present embodiment, the grid 10 of said second thin film transistor (TFT) 002 is connected to different sweep trace 101a, 101b with the grid 15 of the first film transistor 001, and said sweep trace 101a, 101b are adjacent.As other embodiment, the grid 10 of said 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 figure 4 and Fig. 5, Fig. 5 is the cross section structure figure of A1-A2 direction among Fig. 4, as preferred embodiment, also comprises the 3rd public electrode 104-2 that is positioned at part first pixel electrode 107 and second pixel electrode, 108 belows.Also be provided with first insulating medium layer 121 between said first pixel electrode 107, second pixel electrode 108 and the 3rd public electrode 104-2; Said the 3rd public electrode 104-2 and first pixel electrode 107 are formed the first pixel capacitance CS1; Said the 3rd public electrode 104-2 and second pixel electrode 108 are formed the second pixel capacitance CS2, and the said first pixel capacitance CS1 is parallelly connected relation with the second pixel capacitance CS2.
Then with reference to figure 4 and Fig. 5; As specific embodiment; In order to keep first pixel electrode 107 to be electrically connected with second pixel electrode 108, then first pixel electrode 107 and second pixel electrode 108 are electrically connected through position the 3rd transparency electrode 109 on it and that be electrically connected with it.First pixel electrode 107 and second pixel electrode, 108 tops are provided with second insulating medium layer 122; First pixel electrode 107 directly is connected with the drain electrode 12 of second thin film transistor (TFT) 002; Drain electrode 12 is electrically connected with second transparency electrode 109 through position via hole 19a on it through the position via hole 13 and second pixel electrode 108 on it, thereby drains 12, first pixel electrode 107, second pixel electrode, 108 equipotentials.
Then with reference to figure 6; As preferred embodiment; First pixel electrode 107 also is electrically connected with the 3rd transparency electrode 109 through the via hole 19b that is provided with above it; Can guarantee that also shows signal transfers to second pixel electrode 108 even drain electrode 12 described in Fig. 5 can not well electrically connect with said the 3rd transparency electrode 109, thereby reduce pixel display abnormality probability.Identical among all the other structures among Fig. 6 and connection and Fig. 5, no longer narration.
Fig. 8 is the outside vertical view that is integrated with the liquid crystal indicator of touch sensitive display unit as shown in Figure 4; Promptly from the plan view of said color membrane substrates top; Specifically comprise: black matrix 133 is the light tight place of pixel cell; Be used to block extraneous light and avoid infringement, and the interference between the look resistance R, G, B, metal wire are to reflection of light etc. internal components.Be positioned at 133 in said black matrix, also be formed with the part that can be used for printing opacity, what the part of said printing opacity was corresponding is the part that is used to receive extraneous light in the pixel cell in the touch sensitive display unit.Between adjacent unit pixel; Also be formed with the ordered series of numbers touch detection unit; Only show among the figure on the detection line 112 of detection signal receiving trap and detection terminal 110; The user is through touching illustrated touch display unit, and detection terminal 110 contacts with the affirmation touch location with the first transparency electrode 106-1 of touch terminal 106 tops as shown in Figure 7.
Below in conjunction with the description of above-mentioned touch sensitive display unit to said coplane conversion type liquid crystal display device, the testing process of the touch sensitive display unit of said coplane conversion type liquid crystal display device is described.With reference to figure 4; Comprise: scan and choose corresponding pixel cell and touch detection unit successively through sweep trace 101a, 101b; Promptly provide voltage respectively the said the first film transistor 001 and second thin film transistor (TFT) 002 are opened successively successively to the grid 15 of said the first film transistor 001 and the grid 10 of second thin film transistor (TFT); Can confirm the touch location of directions X this moment; Simultaneously through said signal transmssion line 103a, voltage is provided to the source electrode 14 of the first film transistor 001 of said touch detection unit; And the data line 102a through said pixel cell, to the source electrode 11 of second thin film transistor (TFT) of said pixel cell display voltage is provided; With reference to figure 7, reference voltage is provided simultaneously to the said detection signal receiving trap that touches detection line 112 that comprises; When the color membrane substrates 113 of finger presses institute liquid crystal indicator; Said detection terminal 110 is electrically connected with said 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,, just confirm the position of the touch of Y direction according to the change in voltage of detection signal receiving trap through the detection signal receiving trap of detection terminal 110 transmission as for correspondence.
As shown in Figure 9, be first embodiment of the invention, comprise the circuit diagram of a plurality of aforesaid touch sensitive display units, said touch sensitive display unit is the ranks arranged.Said touch sensitive display unit is the ranks arranged.Said touch sensitive display unit 210 comprises pixel cell 211 and touch detection unit 212.In the present embodiment, said touch sensitive display unit 3 only is shown is formed with 3 row, 3 row.Further, said touch display unit can also be the touch sensitive display unit 210 of other numbers.
Originally the scan signal line that illustrates is followed successively by 201a, 201b, 201c, 201d; The signal transmssion line of the pixel cell in the 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.
Shown in figure 10, be second embodiment of the invention, include the circuit diagram of a plurality of aforesaid touch sensitive display units, comprising: a plurality of touch sensitive display units and a plurality of independent pixels unit, said touch sensitive display unit is the ranks arranged.Said touch sensitive display unit 310 comprises pixel cell 311 and touch detection unit 312.In the present embodiment, said touch sensitive display unit 310 only is shown is formed with 3 row, 2 row, and between said two row, also be formed with the independent pixel unit, and said independent pixel unit formation row, between two row touch sensitive display units.Further, said touch display unit can also be the touch sensitive display unit 310 of other numbers.
As other embodiment, said independent pixel unit further is optionally between adjacent two row touch sensitive display units 310.
Originally the scan signal line that illustrates is followed successively by 301a, 301b, 301c, 301d; The signal transmssion line of pixel cell in the 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 embodiment, the scan signal line of same touch sensitive display unit can not be positioned at same delegation.Shown in figure 11; Pixel cell 411 in the same touch sensitive display unit 410 lays respectively at adjacent two row with the sweep trace of touch detection unit 412; The grid that is said pixel cell 411 is connected to sweep trace 401a, and the grid of said touch detection unit 412 is connected to sweep trace 401b.
The present invention also provides a kind of liquid crystal indicator that includes said touch sensitive display unit or said touch display unit.Can just not be described in detail with reference to the associated description of said touch sensitive display unit or touch display unit particularly here.
What more than describe is the structure and the device and the touch detecting method that include said touch sensitive display unit of touch sensitive display unit; Then it is carried out voltage analog; Checking includes in the touch display unit of said touch sensitive display unit; Whether said upper substrate touches and detects voltage and can there be influence in the molecule of the pixel cell that is used for showing like liquid crystal molecule, and detects the voltage range that is suitable for of said touch display unit.
Touch display unit provided by the invention for example adopts the form of row counter-rotating; The voltage that specifically applies corresponds to respectively: to said touch detection line 112 voltage is provided; Detection terminal 110 with touch detection line 112 both because of electrically connecting; Then have identical voltage, be made as V1, be i.e. V1=V112=V110;
To public electrode voltage is provided, its high voltage appearance is Vcom-h=5V, and low-voltage is Vcom-l=0V;
To said pixel cell voltage is provided, said voltage is Vpixel.
According to above-mentioned voltage presentation mode, the drive waveforms of said touch display unit is shown in figure 12, has following voltage value relation:
At voltage peak place, V1=V113=Vcom-h=5V;
At voltage valley place, V1=V113=Vcom-l=0V.
Below simulate respectively under white picture and black picture, whether the voltage on the touch detection line 112 can influence the arrangement of liquid crystal molecule, the form that the each several part magnitude of voltage is shown in figure 13 between 0-5V.Analog result is following:
Under the black picture:
(1) V
Com=0V, V
Pixel=0V, V113=0V, V1=0V, liquid crystal molecule arrange and the penetrance waveform shown in figure 14;
(2) V
Com=0V, V
Pixel=0V, V113=0V, V1=5V, liquid crystal molecule arrange and the penetrance waveform shown in figure 15;
(3) V
Com=5V, V
Pixel=5V, V113=5V, V1=0V, liquid crystal molecule arrange and the penetrance waveform shown in figure 16;
(4) V
Com=5V, V
Pixel=5V, V113=5V, V1=5V, liquid crystal molecule arrange and the penetrance waveform shown in figure 17.
Conclusion: as can be seen from the figure, under the black picture, the voltage that touches detection line 112 distributes and the not influence of penetrance waveform to liquid crystal molecule when 0-5V changes.
Mark among Figure 14 to 17 has problem: 112 and VITO indicate mistake, amended like Figure 14 to 17
Under the white picture:
(1) V
Com=0V, V
Pixel=5V, V113=0V, V1=0V, liquid crystal molecule arrange and the penetrance waveform shown in figure 18;
(2) V
Com=0V, V
Pixel=5V, V113=0V, V1=5V, liquid crystal molecule arrange and the penetrance waveform shown in figure 19;
(3) V
Com=5V, V
Pixel=0V, V113=5V, V1=0V, liquid crystal molecule arrange and the penetrance waveform shown in figure 20;
(4) V
Com=5V, V
Pixel=0V, V113=5V, V1=5V, liquid crystal molecule arrange and the penetrance waveform shown in figure 21.
Conclusion: as can be seen from the figure, under the white picture, the voltage that touches detection line 112 distributes and the not influence of penetrance waveform to liquid crystal molecule when 0-5V changes.Be in the said touch display unit, the voltage range that touches detection line 112 is 0～5V.
Can find out from above Simulation result, no matter at white picture still at black picture, the voltage that touches detection line 112 is when 0-5V changes, the liquid crystal molecule in the said touch display unit arranged not to be influenced.
Shown in figure 22, the waveform when expression does not touch.Get V1=2.5V and simulate, the highest 5V that gets of V113 voltage, the minimum 0V that gets.
Simultaneously with reference to figure 7; When touching generation, touch detection line 112 and contact with the first transparency electrode 106-1, make that the V1 change in voltage that touches detection line 112 is shown in figure 23; Voltage waveform becomes the waveform of V1-1, learns the direction of touch location through the change in voltage that detects V1.Analog result such as Figure 24 to 27, wherein, Figure 24 to Figure 25 is for being under the black picture, and Figure 26 to Figure 27 can find out for being under the white picture, when V1=2.5V, touches and detects liquid crystal molecule distribution and the not influence of penetrance waveform, is magnitude of voltage applicatory.
Though the present invention with preferred embodiment openly as above; But it is not to be used for limiting the present invention; Any those skilled in the art are not breaking away from the spirit and scope of the present invention; Can utilize the method and the technology contents of above-mentioned announcement that technical scheme of the present invention is made possible change and modification, therefore, every content that does not break away from technical scheme of the present invention; To times simple modification, equivalent variations and modification that above embodiment did, all belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (21)
1. one kind is integrated in the inner touch detection unit of liquid crystal indicator, 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 said signal transmssion line and liquid crystal indicator;
The sweep trace of transistorized grid of said the first film and liquid crystal indicator is connected, and source electrode is connected with signal transmssion line, and drain electrode is connected with the touch terminal;
Said detection terminal is connected with the detection signal receiving trap, and is oppositely arranged with said touch terminal.
2. touch detection unit as claimed in claim 1 is characterized in that: the data line of said signal transmssion line and liquid crystal indicator is with one deck metal.
3. touch detection unit as claimed in claim 1 is characterized in that: the top of said touch terminal also is provided with first transparency electrode that is electrically connected with it.
4. touch detection unit as claimed in claim 1 is characterized in that: said detection terminal is made up of pillar and conductive layer, and said conductive layer is wrapped in the outside of pillar.
5. touch detection unit as claimed in claim 1 is characterized in that: under stressing conditions, said touch terminal and detection terminal are electrically connected, and said detection terminal receives the signal that touches the terminal transmission.
6. touch detection unit as claimed in claim 5 is characterized in that: said signal transmssion line, the first film transistor, touch terminal are positioned on the array base palte of liquid crystal indicator, and said detection terminal is positioned on the color membrane substrates of said liquid crystal indicator.
7. a touch sensitive display unit that comprises touch detection unit as claimed in claim 1 is characterized in that: also comprise pixel cell; Said pixel cell comprises second thin film transistor (TFT), and the grid of said second thin film transistor (TFT) connects sweep trace, and the source electrode of said second thin film transistor (TFT) is connected with the data line of liquid crystal indicator.
8. touch sensitive display unit as claimed in claim 7 is characterized in that: the sweep trace that the said sweep trace that is connected with the second film crystal tube grid is connected with the first film transistor gate of touch detection unit is same sweep trace.
9. touch sensitive display unit as claimed in claim 7 is characterized in that: the said sweep trace that is connected with the second film crystal tube grid is adjacent with the sweep trace that the first film transistor gate of touch detection unit is connected.
10. touch sensitive display unit as claimed in claim 7; It is characterized in that: also comprise public electrode and signal transmssion line top and with equipotential second transparency electrode of public electrode, be positioned at pixel electrode top and with equipotential the 3rd transparency electrode of pixel electrode.
11. touch sensitive display unit as claimed in claim 10 is characterized in that: said pixel electrode is divided into first pixel electrode and second pixel electrode of mutual electrical connection, lays respectively at the both sides of signal transmssion line and breaks off with the signal transmssion line infall.
12. touch sensitive display unit as claimed in claim 11 is characterized in that: said first pixel electrode and second pixel electrode are electrically connected through the 3rd transparency electrode that is positioned at its top.
13. touch sensitive display unit as claimed in claim 12; It is characterized in that: the drain electrode top of said second thin film transistor (TFT) also is provided with the 3rd transparency electrode; The drain electrode top of second thin film transistor (TFT) and the top of second pixel electrode are provided with via hole; The drain electrode of said second thin film transistor (TFT) and second pixel electrode are electrically connected with the 3rd transparency electrode through position via hole on it, and are electrically connected each other through the 3rd transparency electrode.
14. touch sensitive display unit as claimed in claim 13; It is characterized in that: the top of first pixel electrode also is provided with via hole and is electrically connected with the 3rd transparency electrode, and the drain electrode of said second thin film transistor (TFT), first pixel electrode and second pixel electrode are electrically connected through position the 3rd transparency electrode on it.
15. touch sensitive display unit as claimed in claim 11 is characterized in that: said first pixel electrode and second pixel electrode are strip, waveform or serrate, in the direction setting parallel with said signal transmssion line.
16. touch sensitive display unit as claimed in claim 10; It is characterized in that: said public electrode is divided into first public electrode and second public electrode of mutual electrical connection; Said first public electrode is positioned at first pixel electrode away from second pixel electrode, one side, and said second public electrode is positioned at second pixel electrode away from first pixel electrode, one side.
17. touch sensitive display unit as claimed in claim 16 is characterized in that: said first public electrode and second public electrode are strip, waveform or serrate, in the direction setting parallel with signal transmssion line.
18. touch sensitive display unit as claimed in claim 16; It is characterized in that: also comprise the 3rd public electrode that is connected with said first public electrode, second public electrode; Said the 3rd public electrode be positioned at pixel electrode below and with its insulation, be used to form the MM CAP of pixel.
19. liquid crystal indicator that comprises the arbitrary said touch sensitive display unit of claim 7 to 18.
20. the detection method of a touch detection unit as claimed in claim 1 is characterized in that, comprising:
Through the scan signal line that is connected with the touch detection unit touch detection unit of lining by line scan, promptly apply voltage to the transistorized grid of said the first film, can judge the position of directions X;
Through the signal transmssion line of touch detection unit, required voltage is provided simultaneously to the transistorized source electrode of said the first film;
To the detection signal receiving trap reference voltage is provided; When the finger presses touch detection unit, said detection terminal is electrically connected with said touch terminal, and then the voltage of the first film transistor source transfers to through the first film transistor drain and touches terminal, detection terminal and detection signal receiving trap; Through the change in voltage of inspection detection signal receiving trap, confirm to touch the position of Y direction.
21. the detection method like the said touch sensitive display unit of claim 20 is characterized in that:
Carry out scanning element unit and touch detection unit line by line through sweep trace, promptly provide voltage to open the said the first film transistor and second thin film transistor (TFT) successively to the said the first film transistor gate and the second film crystal tube grid;
Through said signal transmssion line, detection voltage is provided to the first film transistor source of said touch detection unit; Through data line, display voltage is provided to the second thin film transistor (TFT) source electrode of said pixel cell:
To the detection signal receiving trap reference voltage is provided; When wherein one or more touch detection unit of the said touch display unit of finger presses, said detection terminal is electrically connected with said touch terminal, and then the voltage of the first film transistor source is through detection terminal transmission detection signal receiving trap; Through the change in voltage of inspection detection signal receiving trap, confirm the position that touches.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176658A (en) * | 2013-03-25 | 2013-06-26 | 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 |
| CN103676280A (en) * | 2013-12-17 | 2014-03-26 | 合肥京东方光电科技有限公司 | Array substrate, manufacturing method thereof and touch panel |
| WO2015010425A1 (en) * | 2013-07-26 | 2015-01-29 | 京东方科技集团股份有限公司 | Capacitive touchscreen |
| CN106383609A (en) * | 2016-09-12 | 2017-02-08 | 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101424855A (en) * | 2008-12-09 | 2009-05-06 | 友达光电股份有限公司 | Display panel with multiplex touch control function |
| CN101510036A (en) * | 2009-03-26 | 2009-08-19 | 友达光电股份有限公司 | LCD panel, LCD device and control method thereof |
| CN101576694A (en) * | 2008-05-08 | 2009-11-11 | 乐金显示有限公司 | Display device and method of manufacturing the same |
| US20100013789A1 (en) * | 2008-07-17 | 2010-01-21 | Infovision Optoelectronics (Kunshan) Co. Ltd. | Touch control liquid crystal display array substrate and a liquid crystal display |
| CN101661201A (en) * | 2008-08-29 | 2010-03-03 | 宏碁股份有限公司 | Integrated pixel structure, integrated touch control liquid crystal display device and touch control method thereof |
| CN101706621A (en) * | 2009-12-01 | 2010-05-12 | 昆山龙腾光电有限公司 | Touch-control liquid crystal display panel and manufacturing method thereof as well as touch-control liquid crystal display device |
-
2010
- 2010-10-26 CN CN201010519907.0A patent/CN102455532B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576694A (en) * | 2008-05-08 | 2009-11-11 | 乐金显示有限公司 | Display device and method of manufacturing the same |
| US20100013789A1 (en) * | 2008-07-17 | 2010-01-21 | Infovision Optoelectronics (Kunshan) Co. Ltd. | Touch control liquid crystal display array substrate and a liquid crystal display |
| CN101661201A (en) * | 2008-08-29 | 2010-03-03 | 宏碁股份有限公司 | Integrated pixel structure, integrated touch control liquid crystal display device and touch control method thereof |
| CN101424855A (en) * | 2008-12-09 | 2009-05-06 | 友达光电股份有限公司 | Display panel with multiplex touch control function |
| CN101510036A (en) * | 2009-03-26 | 2009-08-19 | 友达光电股份有限公司 | LCD panel, LCD device and control method thereof |
| CN101706621A (en) * | 2009-12-01 | 2010-05-12 | 昆山龙腾光电有限公司 | Touch-control liquid crystal display panel and manufacturing method thereof as well as touch-control liquid crystal display device |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103176658A (en) * | 2013-03-25 | 2013-06-26 | 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 |
| 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 |
| WO2015010425A1 (en) * | 2013-07-26 | 2015-01-29 | 京东方科技集团股份有限公司 | Capacitive touchscreen |
| CN103676280A (en) * | 2013-12-17 | 2014-03-26 | 合肥京东方光电科技有限公司 | Array substrate, manufacturing method thereof and touch panel |
| WO2015090005A1 (en) * | 2013-12-17 | 2015-06-25 | 京东方科技集团股份有限公司 | Array substrate and manufacturing method therefor and 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 |
| US9575350B2 (en) | 2013-12-17 | 2017-02-21 | Boe Technology Group Co., Ltd. | Array substrate and manufacturing method thereof and touch panel |
| CN106383609A (en) * | 2016-09-12 | 2017-02-08 | 北京小米移动软件有限公司 | Display panel and electronic equipment |
| 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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|---|---|
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