CN1916739A - Liquid crystal display plate and related display - Google Patents
Liquid crystal display plate and related display Download PDFInfo
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- CN1916739A CN1916739A CN 200610127487 CN200610127487A CN1916739A CN 1916739 A CN1916739 A CN 1916739A CN 200610127487 CN200610127487 CN 200610127487 CN 200610127487 A CN200610127487 A CN 200610127487A CN 1916739 A CN1916739 A CN 1916739A
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Abstract
A face plate of liquid crystal display is prepared as setting the first electrode between the first base plate and insulation layer, setting conductor on insulation layer, setting the second and the third electrodes with contact surface separately on the second base plate and making the second and the third electrodes be not contacted to each other and arranging a gap between the two, setting conductor at position corresponding to said gap in order to let conductor to contact with contact surfaces of the second and the third electrodes simultaneously when the first and the second base plates are closed with each other under pressure.
Description
Technical field
The present invention relates to a kind of LCD, refer to a kind of LCD that receives the touch-control order especially.
Background technology
Along with the fast development of science and technology, bulk information can exchange with the form of numerical data, put in order and store, and the electronic installation that is used for reading with the access numerical data also becomes one of instrument important in the advanced information society.Notebook computer, mobile phone and personal digital assistant (Personal Digital Assistant, PDA) etc. portable electronic devices has advantages such as volume is little, in light weight and easy to carry, can allow the user consult, browse whenever and wherever possible and stores various numerical datas.Portable electronic devices is emphasized designs such as light, thin, short, little on the one hand on external form, the inputting interface that hommization is arranged on the one hand again, there is no enough spaces and hold, so often use touch panel (Touch Panel) to be used as the man-machine interface that its data are linked up as traditional input medias such as keyboard or mouses.When user's contact applied pressure to contact panel, contact panel can be responded to the position (or the size of exerting pressure) of exerting pressure, and obtains different steering orders according to the different positions of exerting pressure, and controls the running of portable electronic devices thus.
Generally speaking, portable electronic devices often uses display panels (Liquid Crystal DisplayPanel) to be used as display screen, but and the technology of touch panel roughly sub-resistance formula, condenser type, ultrasonic formula and optical profile type etc.Please refer to Fig. 1, Fig. 1 is the synoptic diagram of LCD 10 in the prior art.LCD 10 comprises display panels 110 and electric resistance touch-control panel 120.Electric resistance touch-control panel 120 and display panels 110 overlap by adhesive-layer 140.Display panels 110 comprises first substrate 112, first electrode 114, liquid crystal layer 115, second electrode 116 and second substrate 118.Electric resistance touch-control panel 120 includes substrate 122, time transparent conductive film 124, a plurality of wall (Dot Spacer) 125, last transparent conductive film 126, connecting layer 127, polyethylene terephthalate (Polyethylene Terephthalate, PET) layer 128 and lead 130.Connecting layer 127 is located between transparent conductive film 126 and the following transparent conductive film 124, and wall 125 then is located at zone between transparent conductive film 126 and the following transparent conductive film 124 with array way.When the user exerts pressure on pet layer 128 with finger, pen or other input tool, last transparent conductive film 126 is producing corresponding voltage with following transparent conductive film 124 corresponding to point of application part can contact with each other, and then the signal that will be relevant to the pressure spot track is sent to central processing unit (not being shown in Fig. 1), the order of being assigned correctly to differentiate the user via lead 130.In the LCD 10 of prior art, therefore electric resistance touch-control panel 120 is connected on display panels 110 by adhesive-layer 140, includes than the piling up of multicomponent, and not only has cost higher, shortcomings such as bulky and preponderance also can influence optical appearance such as brightness or contrast.
Please refer to Fig. 2, Fig. 2 is the synoptic diagram of the LCD 20 that disclosed among the US publication US2006/0017710.LCD 20 comprises many data lines (Data Line), many gate lines (GateLine), many detection signal lines and a plurality of pixel (Pixel).For the purpose of simplifying the description, only video data line DL, gate lines G L, detection signal line Pj, Si and Psd and pixel PX of Fig. 2.Pixel PX comprises display unit DC and detecting unit SC.Display circuit DC is coupled to data line DL and gate lines G L, comprises thin film transistor (TFT) (Thin Film Transistor, TFT) switching TFT 1, liquid crystal capacitance C
LCWith storage capacitors C
STDetecting unit SC is coupled to detection signal line Pj, Si and Psd, comprises thin film transistor switch TFT2, TFT3 and variable capacitance C
VIn LCD 20, as user during with the touch control manner input command, the power of touching can change variable capacitance C
VValue, and then the grid voltage of change thin film transistor switch TFT3, after thin film transistor switch TFT3 is switched on, the signal that is relevant to the pressure spot track can be sent to central processing unit (not being shown in Fig. 2), the touch-control order of being assigned correctly to differentiate the user via the thin film transistor switch TFT3 and the detection signal line Psd of conducting.In the LCD 20 of prior art, variable capacitance C
VValue be relevant to user's application of force size, therefore the situation that electric charge is residual or signal resolution is difficult for, the accuracy when influencing the order of identification touch-control may take place in the direct grid voltage of control TFT switching TFT 3.
Please refer to Fig. 3, Fig. 3 is the synoptic diagram of the LCD 30 that disclosed among the US publication US2004/0169625.Display panels 30 comprises first substrate 112, first electrode 114, liquid crystal layer 115, second electrode 116 and second substrate 118.Bottom electrode 116 is located on second substrate 118, and definition has a plurality of pixel PX on it.Also be provided with a plurality of Photosensing Units PD on second substrate 118, the user can come input signal by light source 150 (for example optical pen), and Photosensing Units PD is sent to central processing unit (not being shown in Fig. 3) to differentiate the order that the user is assigned by light source 150 with the optical signalling that receives.The LCD 30 of prior art uses Photosensing Units PD to detect the input signal of external light source, and the signal of can't the sensing user being imported with touch control manner.
Summary of the invention
The invention provides a kind of display panels, comprise first substrate; Second substrate, parallel and towards this first substrate; First electrode is located on this first substrate; First insulation course is located on this first electrode; Second electrode is located on this second substrate and comprises first area and second area; Third electrode is located on this second substrate and comprises the 3rd zone and the 4th zone, and the gap that is separated by between the 3rd zone of this second area of this second electrode and this third electrode; Second insulation course is located on the first area of this second electrode, and is located on the 4th zone of this third electrode; And conductor, be located on this first insulation course and corresponding to this gap part.
The present invention also provides a kind of display panels, and it comprises first substrate; Second substrate, parallel and towards this first substrate; First electrode is located on this first substrate; Conductor is located on this first electrode; First insulation course is located at the zone beyond this conductor on this first electrode; Second electrode is located on this second substrate corresponding to this conductor part, and comprises first area and second area, when this first substrate and this second substrate because of pressure when closer to each other, this first area of this conductor and this second electrode contacts with each other; With second insulation course, be located on this second area of this second electrode.
The present invention also provides a kind of LCD, and it comprises display panels, and it comprises: many data lines are used for transmitting the data-signal that is relevant to this LCD desire show image; Many gate lines are used for the transmission scan signal; The first detection signal line is coupled to first bias voltage; The second detection signal line is coupled to second bias voltage; Display unit is coupled to corresponding data line and corresponding gate line, is used for coming show image according to this corresponding gate line sweep signal that transmits and the data-signal that this corresponding data line transmits; And detecting unit, be coupled to this second detection signal line, whether this detecting unit is electrically connected with the first detection signal line according to touch-control order decision; And signal processing circuit, be coupled to this second detection signal line, be used for when the output signal change of this second detection signal line, producing corresponding output signal.
The present invention also provides a kind of LCD, and it comprises display panels, and it comprises many data lines, is used for transmitting the data-signal that is relevant to this LCD desire show image; Many gate lines are used for the transmission scan signal; The detection signal line; Display unit is coupled to corresponding data line and corresponding gate line, is used for coming show image according to this corresponding gate line sweep signal that transmits and the data-signal that this corresponding data line transmits; And detecting unit, be coupled to this detection signal line, whether this detecting unit is electrically connected with the first detection signal line according to touch-control order decision; And signal processing circuit, be coupled to this detection signal line, be used for when the output signal change of this detection signal line, producing corresponding output signal.
Description of drawings
Fig. 1 is the synoptic diagram of LCD in the prior art.
Fig. 2 is the synoptic diagram of LCD in the prior art.
Fig. 3 is the synoptic diagram of LCD in the prior art.
Fig. 4 is the diagrammatic cross-section of LCD when not receiving the touch-control order in the first embodiment of the invention.
Fig. 5 is the diagrammatic cross-section of LCD when receiving the touch-control order of first embodiment of the invention.
Fig. 6 is the equivalent circuit diagram of LCD of the present invention when not receiving the touch-control order.
Fig. 7 is the equivalent circuit diagram of LCD of the present invention when receiving the touch-control order.
Fig. 8 is the diagrammatic cross-section of LCD when not receiving the touch-control order in the second embodiment of the invention.
Fig. 9 is the diagrammatic cross-section of LCD when receiving the touch-control order of second embodiment of the invention.
Figure 10 is the diagrammatic cross-section of LCD when not receiving the touch-control order in the third embodiment of the invention.
Figure 11 is the diagrammatic cross-section of LCD when receiving the touch-control order of third embodiment of the invention.
Figure 12 is the diagrammatic cross-section of LCD when not receiving the touch-control order in the fourth embodiment of the invention.
Figure 13 is the diagrammatic cross-section of LCD when receiving the touch-control order of fourth embodiment of the invention.
Figure 14 is the diagrammatic cross-section of LCD when not receiving the touch-control order in the fifth embodiment of the invention.
Figure 15 is the diagrammatic cross-section of LCD when receiving the touch-control order of fifth embodiment of the invention.
Figure 16 is the equivalent circuit diagram of LCD of the present invention when not receiving the touch-control order.
Figure 17 is the equivalent circuit diagram of LCD of the present invention when receiving the touch-control order.
Figure 18 is the diagrammatic cross-section of LCD when not receiving the touch-control order in the sixth embodiment of the invention.
Figure 19 is the diagrammatic cross-section of LCD when receiving the touch-control order of sixth embodiment of the invention.
Figure 20 is the equivalent circuit diagram of LCD of the present invention when not receiving the touch-control order.
Figure 21 is the equivalent circuit diagram of LCD of the present invention when receiving the touch-control order.
The simple symbol explanation
110 display panels, 120 electric resistance touch-control panels
125 walls, 127 connecting layers
128 pet layers, 130 leads
140 adhesive-layers, 150 light sources
50 integrator circuits, 5 septs
81-83 conductor 84,85 projective structures
PS thrust 124,126 transparent conductive films
DL data line GL, GL
i, GL
I+1Gate line
PX pixel OP amplifier
DC display unit SC detecting unit
PD Photosensing Units ADC analog-digital converter
31-35,41-45 insulation course
91-95,115 liquid crystal layers
112,118,122,11-15,21-25 substrate
6,114,116,51-55,61-65,71-75 electrode
C
LC, C
ST1, C
ST2, C
V, C electric capacity
TFT1-TFT3, SW switch
Pj, Si, Psd, SL
i, SL
oThe detection signal line
10,20,30,100,200,300,400,500,600 LCD
Embodiment
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the diagrammatic cross-section of LCD 100 when not receiving the touch-control order in the first embodiment of the invention, and Fig. 5 is the diagrammatic cross-section of LCD 100 when receiving the touch-control order of first embodiment of the invention.LCD 100 comprises first substrate 11, second substrate 21, first insulation course 31, second insulation course 41, first electrode 51, second electrode 61, third electrode 71, conductor 81 and liquid crystal layer 91.Liquid crystal layer 91 is located between first substrate 11 and second substrate 21, and the sense of rotation of liquid crystal molecule can change along with impressed voltage in the liquid crystal layer 91, and different penetrance of light and refractive index can be provided, and therefore can show different images.First electrode 51 is formed on first substrate 11, can be used as common electrode (Common Electrode), required common voltage (Common Voltage) in the time of can providing LCD 100 running by first electrode 51.First insulation course 31 is located between the conductor 81 and first electrode 51, so conductor 81 separates for electricity with first electrode 51.Second electrode 61 and third electrode 71 are formed on second substrate 21, do not connect mutually each other, and the gap that is separated by between second electrode 61 and the third electrode 71, the center in gap is corresponding to the center of first substrate, 11 upper conductors 81.Second insulation course 41 is located at the presumptive area on second electrode 61 and the third electrode 71, and is located on second substrate 21 zone corresponding to the gap.Second electrode 61 and third electrode 71 are comprising the exposed region that is not covered by second insulation course 41 near the gap part, the exposed region that promptly is provided with second insulation course, 41, the second electrodes 61 between the presumptive area of second electrode 61 and the liquid crystal layer 91 then directly contacts with liquid crystal layer 91; In like manner, be provided with second insulation course 41 between the presumptive area of third electrode 71 and the liquid crystal layer 91, the exposed region of third electrode 71 then directly contacts with liquid crystal layer 91.The conductor 81 of LCD 100 can be spherical conductor, for example gold (Ag), copper (Au), or the conductive material of other shape.First electrode 51, second electrode 61 and third electrode 71 can comprise tin indium oxide (Indium Tin Oxide, ITO) or the conductive material of other kind.
When the user did not issue an order with touch control manner or imports data, second electrode 61 of LCD 100 separated with third electrode 71 is electric each other, as shown in Figure 4.When the user desires to issue an order or when importing data with touch control manner, can apply pressure to first substrate 11, distance between first substrate 11 and second substrate 21 can shorten at this moment, make conductor 81 can touch the exposed region of second electrode 61 and third electrode 71 simultaneously, therefore second electrode 61 and third electrode 71 can be electrically connected by conductor 81, as shown in Figure 5.
Please refer to Fig. 6 and Fig. 7, Fig. 6 is the equivalent circuit diagram (corresponding to Fig. 4) of LCD 100 when not receiving the touch-control order of first embodiment of the invention, and Fig. 7 is the equivalent circuit diagram (corresponding to Fig. 5) of LCD 100 when receiving the touch-control order of first embodiment of the invention.In Fig. 6 and Fig. 7, all explain with pixel PX in the LCD 100.Pixel PX comprises display unit DC and detecting unit SC.Display unit DC is coupled to corresponding data line DL and gate lines G L
i, comprise thin film transistor switch TFT1, liquid crystal capacitance C
LCWith storage capacitors C
ST1Detecting unit SC is coupled to corresponding detection signal line SL
iAnd SL
o, comprise thin film transistor switch TFT2 and storage capacitors C
ST2Terminal A is corresponding to the exposed region of second electrode 61, and terminal B is corresponding to the exposed region of third electrode 71.The detection signal line SL of LCD 100
iBe coupled to voltage Vi, and detection signal line SL
oBe coupled to voltage Vref.LCD 100 shown in Fig. 6 and Fig. 7 also comprises integrator circuit 50, integrator circuit 50 comprises elements such as amplifier (Operational Amplifier) OP, capacitor C, reset switch SW and analog/digital converter (Analog-to-Dieital Converter) ADC, can produce corresponding output voltage Vout according to the value of voltage Vo and Vref.
When not receiving the touch-control order, second electrode 61 separates (as shown in Figure 4) for electricity with third electrode 71, and the equivalent electrical circuit of LCD 100 as shown in Figure 6 at this moment.Because for opening circuit, voltage Vi can't reach storage capacitors C between this moment terminal A and the terminal B
ST2, when thin film transistor switch TFT2 is unlocked, storage capacitors C
ST2Can keep the accurate position of voltage Vref, this moment amplifier OP the signal identical (Vo=Vref) that receives of two input ends, integrator circuit 50 will can not measure electric current to be changed.When receiving the touch-control order, second electrode 61 and third electrode 71 can be by conductor 81 for conducting (as shown in Figure 5), and the equivalent electrical circuit of LCD 100 as shown in Figure 7 at this moment.Because be short circuit between terminal A and the terminal B this moment, voltage Vi can reach storage capacitors C
ST2And change storage capacitors C
ST2Current potential.When thin film transistor switch TFT2 is unlocked, because storage capacitors C
ST2Accurate position change to some extent, this moment amplifier OP the signal that receives of two input ends also different (Vo ≠ Vref), integrator circuit 50 can change according to the electric current that pressure reduction measures corresponding to the touch-control order.
Please refer to Fig. 8 and Fig. 9, Fig. 8 is the diagrammatic cross-section of LCD 200 when not receiving the touch-control order in the second embodiment of the invention, and Fig. 9 is the diagrammatic cross-section of LCD 200 when receiving the touch-control order of second embodiment of the invention.LCD 200 comprises first substrate 12, second substrate 22, first insulation course 32, second insulation course 42, first electrode 52, second electrode 62, third electrode 72, thrust (Protrusion) PS and liquid crystal layer 92.Liquid crystal layer 92 is located between first substrate 12 and second substrate 22, and the sense of rotation of liquid crystal molecule can change along with impressed voltage in the liquid crystal layer 92, and different penetrance of light and refractive index can be provided, and therefore can show different images.First electrode 52 is formed on first substrate 12, can be used as common electrode, can provide LCD 200 runnings required common voltage by first electrode 52.First insulation course 32 is located between the thrust PS and first electrode 52, so is that electricity separates between the thrust PS and first electrode 52.Thrust PS comprises light-locking material, and effect is the light leak between each pixel in the isolated LCD 200.In second embodiment of the invention, conductor 82 is set on thrust PS also.Second electrode 62 and third electrode 72 are formed on second substrate 22, do not connect mutually each other, and the gap that is separated by between second electrode 62 and the third electrode 72, the center in gap is corresponding to the center of first substrate, 12 upper conductors 82.Second insulation course 42 is located at the presumptive area on second electrode 62 and the third electrode 72, and is located on second substrate 22 zone corresponding to the gap.Second electrode 62 and third electrode 72 are comprising the exposed region that is not covered by second insulation course 42 near the gap part, the exposed region that promptly is provided with second insulation course, 42, the second electrodes 62 between the presumptive area of second electrode 62 and the liquid crystal layer 92 then directly contacts with liquid crystal layer 92; Be provided with second insulation course 42 between the presumptive area of third electrode 72 and the liquid crystal layer 92, and the exposed region of third electrode 72 contacts with liquid crystal layer 92 directly.
When the user did not issue an order with touch control manner or imports data, second electrode 62 of LCD 200 separated with third electrode 72 is electric each other, and as shown in Figure 8, the equivalent circuit diagram of LCD 200 also as shown in Figure 6 at this moment.When the user desires to issue an order or when importing data with touch control manner, can apply pressure to first substrate 12, distance between first substrate 12 and second substrate 22 can shorten at this moment, make the conductor 82 on the thrust PS can touch the exposed region of second electrode 62 and third electrode 72 simultaneously, therefore second electrode 62 and third electrode 72 can be electrically connected by conductor 82, as shown in Figure 5, this moment LCD 200 equivalent circuit diagram also as shown in Figure 7.
Please refer to Figure 10 and Figure 11, Figure 10 is the diagrammatic cross-section of LCD 300 when not receiving the touch-control order in the third embodiment of the invention, and Figure 11 is the diagrammatic cross-section of LCD 300 when receiving the touch-control order of third embodiment of the invention.LCD 300 comprises first substrate 13, second substrate 23, first insulation course 33, second insulation course 43, first electrode 53, second electrode 63, third electrode 73, conductor 83 and liquid crystal layer 93.In the LCD 100 of first embodiment of the invention, first insulation course 31 is located between the conductor 81 and first electrode 51, so is that electricity separates between the conductor 81 and first electrode 51; In the LCD 300 of third embodiment of the invention, conductor 83 is directly arranged on first electrode 53, so conductor 83 and first electrode 53 all have the current potential of common voltage.In addition, second electrode 63 is located on second substrate 23 position corresponding to conductor 83, and comprises surface of contact.Third electrode 63 also is located on second substrate 23, and second electrode 63 of getting along well contacts with each other.First insulation course 33 is located at the zone beyond first electrode, 53 upper conductors 83, and second insulation course 43 is located on the third electrode 73 and the surface of contact zone in addition of second electrode 63.The conductor 83 of LCD 300 can be spherical conductors such as gold goal or copper ball, or the conductive material of other shape.First electrode 53, second electrode 63 and third electrode 73 can comprise the conductive material of tin indium oxide or other kind.
When the user did not issue an order with touch control manner or imports data, the conductor 83 of LCD 300 separated with second electrode 63 is electric each other, as shown in figure 10.When the user desires to issue an order or when importing data with touch control manner, can apply pressure to first substrate 13, distance between first substrate 13 and second substrate 23 can shorten at this moment, make conductor 83 can touch the surface of contact of second electrode 63, therefore first electrode 53 and second electrode 63 can be electrically connected by conductor 83, as shown in figure 11.
Please refer to Figure 12 and Figure 13, Figure 12 is the diagrammatic cross-section of LCD 400 when not receiving the touch-control order in the fourth embodiment of the invention, and Figure 13 is the diagrammatic cross-section of LCD 400 when receiving the touch-control order of fourth embodiment of the invention.LCD 400 comprises first substrate 14, second substrate 24, first insulation course 34, second insulation course 44, first electrode 54, second electrode 64, third electrode 74 and liquid crystal layer 94.LCD 400 among the 4th embodiment and LCD 300 similar among the 3rd embodiment, difference is that the conductor 83 of LCD 300 is formed on first electrode 53 in addition, and first electrode 54 of LCD 400 then comprises projective structure 84.In fourth embodiment of the invention, can on first electrode 54, directly define projective structure 84 by technologies such as etchings, then on first electrode 54, form first insulation course 34 again, at last remove first insulation course 34 that covers on the projective structure 84 again, make the projective structure 84 of the electrode 54 of winning directly to be contacted with liquid crystal layer 94.
When the user did not issue an order with touch control manner or imports data, first electrode 54 of LCD 400 separated with second electrode 64 is electric each other, as shown in figure 12.When the user desires to issue an order or when importing data with touch control manner, can apply pressure to first substrate 14, distance between first substrate 14 and second substrate 24 can shorten at this moment, make the projective structure 84 of the electrode 54 of winning to touch the surface of contact of second electrode 64, therefore first electrode 54 and second electrode 64 can be electrically connected each other, as shown in figure 13.
Please refer to Figure 14 and Figure 15, Figure 14 is the diagrammatic cross-section of LCD 500 when not receiving the touch-control order in the fifth embodiment of the invention, and Figure 15 is the diagrammatic cross-section of LCD 500 when receiving the touch-control order of fifth embodiment of the invention.LCD 500 comprises sept 5, first substrate 15, second substrate 25, first insulation course 35, second insulation course 45, first electrode 55, second electrode 65, third electrode 75 and liquid crystal layer 95.LCD 500 among the 5th embodiment and LCD 400 similar among the 4th embodiment, difference are that LCD 500 also comprises the projective structure 85 of sept 5 to define first electrode 55.In fifth embodiment of the invention, can corresponding to projective structure 85 parts sept 5 be set at first substrate 15 earlier, then form first electrode 55 again, first electrode, 55 natures like this can comprise projective structure 85.Then on first electrode 55, form first insulation course 35 again, remove first insulation course 35 that covers on the projective structure 85 more at last, make the projective structure 85 of the electrode 55 of winning directly to be contacted with liquid crystal layer 95.
When the user did not issue an order with touch control manner or imports data, first electrode 55 of LCD 500 separated with second electrode 65 is electric each other, as shown in figure 14.When the user desires to issue an order or when importing data with touch control manner, can apply pressure to first substrate 15, distance between first substrate 15 and second substrate 25 can shorten at this moment, make the projective structure 85 of the electrode 55 of winning to touch the surface of contact of second electrode 65, therefore first electrode 55 and second electrode 65 can be electrically connected each other, as shown in figure 15.
Please refer to Figure 16 and Figure 17, Figure 16 is the equivalent circuit diagram (corresponding to Figure 10, Figure 12 and Figure 14) of LCD when not receiving the touch-control order of the present invention the 3rd to the 5th embodiment, and Figure 17 is the equivalent circuit diagram (corresponding to Figure 11, Figure 13 and Figure 15) of LCD when receiving the touch-control order of the present invention the 3rd to the 5th embodiment.In Figure 16 and Figure 17 all with LCD in pixel PX explain.Pixel PX comprises display unit DC and detecting unit SC.Display unit DC is coupled to corresponding data line DL and gate lines G L
i, comprise thin film transistor switch TFT1, liquid crystal capacitance C
LCWith storage capacitors C
ST1Detecting unit SC is coupled to detection signal line SL
o, comprise thin film transistor switch TFT2 and storage capacitors C
ST2, terminal A is corresponding to the projective structure 84 of conductor 83, first electrode 54 or the projective structure 85 of first electrode 55, and terminal B is corresponding to second electrode 63,64 or 65.LCD shown in Figure 16 and Figure 17 also comprises integrator circuit 50, integrator circuit 50 comprises elements such as amplifier OP, capacitor C, reset switch SW and analog/digital converter ADC, can produce corresponding output voltage Vout according to the value of voltage Vo and Vref.
When not receiving the touch-control order, the first electrode 53-55 separates (respectively as Figure 10, Figure 12 and shown in Figure 14) with the second electrode 63-65 for electricity respectively, and LCD 300,400 and 500 equivalent electrical circuit are as shown in figure 16 at this moment.Because for opening circuit, common voltage Vcom can't reach storage capacitors C between this moment terminal A and the terminal B
ST2, when thin film transistor switch TFT2 is unlocked, storage capacitors C
ST2Can keep the accurate position of voltage Vref, this moment amplifier OP the signal identical (Vo=Vref) that receives of two input ends, integrator circuit 50 will can not measure electric current to be changed.When receiving the touch-control order, the first electrode 53-55 is electrically connected on the second electrode 63-65 (respectively as Figure 11, Figure 13 and shown in Figure 15) respectively, this moment LCD 300,400 and 500 equivalent electrical circuit as shown in figure 17.Because be short circuit between terminal A and the terminal B this moment, common voltage Vcom can reach storage capacitors C
ST2And change storage capacitors C
ST2Current potential.When thin film transistor switch TFT2 is unlocked, because storage capacitors C
ST2Accurate position change to some extent, this moment amplifier OP the signal that receives of two input ends also different (Vo ≠ Vref), integrator circuit 50 can change according to the electric current that pressure reduction measures corresponding to the touch-control order.
Please refer to Figure 18 and Figure 19, Figure 18 is the diagrammatic cross-section of LCD 600 when not receiving the touch-control order in the sixth embodiment of the invention, and Figure 19 is the diagrammatic cross-section of LCD 600 when receiving the touch-control order of sixth embodiment of the invention.LCD 600 comprises first substrate 16, second substrate 26, first insulation course 36, second insulation course 46, first electrode 56, second electrode 66, third electrode 76, conductor 86, liquid crystal layer 96 and bias electrode 6.LCD 100 similar of the LCD 600 of sixth embodiment of the invention and first embodiment of the invention, difference is that LCD 600 also comprises bias electrode 6, be located between the conductor 86 and first substrate 16, can send into the current potential V that is different from common voltage
BIASBias electrode 6 can comprise the conductive material of tin indium oxide or other kind.
When the user did not issue an order with touch control manner or imports data, the conductor 86 of LCD 600 separated with second electrode 66 is electric each other, as shown in figure 18.When the user desires to issue an order or when importing data with touch control manner, can apply pressure to first substrate 16, distance between first substrate 16 and second substrate 26 can shorten at this moment, make conductor 86 can touch the surface of contact of second electrode 66, therefore the bias electrode 6 and second electrode 66 can be electrically connected by conductor 83, as shown in figure 19.
Please refer to Figure 20 and Figure 21, Figure 20 is the equivalent circuit diagram (corresponding to Figure 18) of LCD when not receiving the touch-control order of sixth embodiment of the invention, and Figure 21 is the equivalent circuit diagram (corresponding to Figure 19) of LCD when receiving the touch-control order of sixth embodiment of the invention.In Figure 20 and Figure 21 all with LCD in pixel PX explain.Pixel PX comprises display unit DC and detecting unit SC.Display unit DC is coupled to corresponding data line DL and gate lines G L
i, comprise thin film transistor switch TFT1, liquid crystal capacitance C
LCWith storage capacitors C
ST1Detecting unit SC is coupled to detection signal line SL
o, comprise thin film transistor switch TFT2 and storage capacitors C
ST2, terminal A is corresponding to conductor 83, and terminal B is corresponding to second electrode 66.LCD shown in Figure 20 and Figure 21 also comprises integrator circuit 50, integrator circuit 50 comprises elements such as amplifier OP, capacitor C, reset switch SW and analog-digital converter ADC, can produce corresponding output voltage Vout according to the value of voltage Vo and Vref.
When not receiving the touch-control order, bias electrode 6 separates (as shown in figure 18) for electricity with second electrode 66, and the equivalent electrical circuit of LCD 600 as shown in figure 20 at this moment.Since between this moment terminal A and the terminal B for opening circuit the voltage V of bias electrode 6
BIASCan't reach storage capacitors C
ST2, when thin film transistor switch TFT2 is unlocked, storage capacitors C
ST2Can keep the accurate position of voltage Vref, this moment amplifier OP the signal identical (Vo=Vref) that receives of two input ends, integrator circuit 50 will can not measure electric current to be changed.When receiving the touch-control order, bias electrode 6 is electrically connected on second electrode 66 (as shown in figure 19), and the equivalent electrical circuit of LCD 600 as shown in figure 21 at this moment.Because be short circuit, the voltage V of bias electrode 6 between terminal A and the terminal B this moment
BIASCan reach storage capacitors C
ST2And change storage capacitors C
ST2Current potential.When thin film transistor switch TFT2 is unlocked, because storage capacitors C
ST2Accurate position change to some extent, this moment amplifier OP the signal that receives of two input ends also different (Vo ≠ Vref), integrator circuit 50 can change according to the electric current that pressure reduction measures corresponding to the touch-control order.
Display panels of the present invention can receive the touch-control order, contact panel need be set additionally on display panels, therefore can reduce the cost of LCD and improve display quality.In addition, according to two independent bottom electrodes or upper/lower electrode conducting whether display panels of the present invention can judge whether to receive external force, the touch-control order that therefore can judge the user exactly and assigned.
The above only is the preferred embodiments of the present invention, and all equivalent variations and modifications of making according to claim of the present invention all should belong to covering scope of the present invention.
Claims (15)
1. display panels comprises:
First substrate;
Second substrate, parallel and towards this first substrate;
First electrode is located on this first substrate;
First insulation course is located on this first electrode;
Second electrode is located on this second substrate and comprises first area and second area;
Third electrode is located on this second substrate and comprises the 3rd zone and the 4th zone, and the gap that is separated by between the 3rd zone of this second area of this second electrode and this third electrode;
Second insulation course is located on the first area of this second electrode, and is located on the 4th zone of this third electrode; With
Conductor is located on this first insulation course and corresponding to this gap part.
2. display panels as claimed in claim 1, it also comprises:
Sept is located between this conductor and this first insulation course.
3. display panels as claimed in claim 1, it also comprises:
The 3rd insulation course is located on this second substrate the zone corresponding to this gap.
4. display panels as claimed in claim 1, it also comprises:
Liquid crystal layer is between this first substrate and this second substrate.
5. display panels comprises:
First substrate;
Second substrate, parallel and towards this first substrate;
First electrode is located on this first substrate;
Conductor is located on this first electrode;
First insulation course is located at the zone beyond this conductor on this first electrode;
Second electrode is located on this second substrate corresponding to this conductor part, and comprises first area and second area, when this first substrate and this second substrate because of pressure when closer to each other, this first area of this conductor and this second electrode contacts with each other; With
Second insulation course is located on this second area of this second electrode.
6. display panels as claimed in claim 5 also comprises:
Sept is located between this first electrode and first substrate position corresponding to this conductor.
7. display panels as claimed in claim 5 also comprises:
Liquid crystal layer is located between this first substrate and this second substrate.
8. LCD comprises:
Display panels comprises:
Many data lines are used for transmitting the data-signal that is relevant to this LCD desire show image;
Many gate lines are used for the transmission scan signal;
The first detection signal line is coupled to first bias voltage;
The second detection signal line is coupled to second bias voltage;
Display unit is coupled to corresponding data line and corresponding gate line, is used for coming show image according to this corresponding gate line sweep signal that transmits and the data-signal that this corresponding data line transmits; With
Detecting unit is coupled to this second detection signal line, and whether this detecting unit is electrically connected with the first detection signal line according to touch-control order decision; With
Signal processing circuit is coupled to this second detection signal line, is used for producing when the output signal change of this second detection signal line corresponding output signal.
9. LCD as claimed in claim 8, wherein this display unit comprises:
Thin film transistor switch, its control end are coupled to this corresponding gate line, and its first end is coupled to this corresponding data line;
Liquid crystal capacitance is coupled to second end of this thin film transistor switch; With
Storage capacitors is coupled to second end and the common voltage of this thin film transistor switch.
10. LCD as claimed in claim 8, wherein this detecting unit comprises:
Thin film transistor switch, its control end is coupled to gate line, and its first end is coupled to this second detection signal line; With
Storage capacitors is coupled to second end of this thin film transistor switch.
11. LCD as claimed in claim 8, wherein this signal processing circuit is an integrator circuit, and comprises amplifier, electric capacity, thin film transistor switch and analog-digital converter.
12. a LCD comprises:
Display panels comprises:
Many data lines are used for transmitting the data-signal that is relevant to this LCD desire show image;
Many gate lines are used for the transmission scan signal;
The detection signal line;
Display unit is coupled to corresponding data line and corresponding gate line, is used for coming show image according to this corresponding gate line sweep signal that transmits and the data-signal that this corresponding data line transmits; With
Detecting unit is coupled to this detection signal line, and whether this detecting unit is electrically connected with the first detection signal line according to touch-control order decision; With
Signal processing circuit is coupled to this detection signal line, is used for producing when the output signal change of this detection signal line corresponding output signal.
13. LCD as claimed in claim 12, wherein this display unit comprises:
Thin film transistor switch, its control end are coupled to this corresponding gate line, and its first end is coupled to this corresponding data line;
Liquid crystal capacitance is coupled to second end of this thin film transistor switch; With
Storage capacitors is coupled to second end and the common voltage of this thin film transistor switch.
14. LCD as claimed in claim 12, wherein this detecting unit comprises:
Thin film transistor switch, its control end is coupled to gate line, and its second end is coupled to this detection signal line; With
Storage capacitors is coupled to first end of this thin film transistor switch and this detection signal line.
15. LCD as claimed in claim 12, wherein this signal processing circuit is an integrator circuit, and comprises amplifier, electric capacity, thin film transistor switch and analog-digital converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101274875A CN100449385C (en) | 2006-09-15 | 2006-09-15 | Liquid crystal display plate and related display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101274875A CN100449385C (en) | 2006-09-15 | 2006-09-15 | Liquid crystal display plate and related display |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810131530A Division CN100580516C (en) | 2006-09-15 | 2006-09-15 | LCD panel and correlated display equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1916739A true CN1916739A (en) | 2007-02-21 |
| CN100449385C CN100449385C (en) | 2009-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101274875A Active CN100449385C (en) | 2006-09-15 | 2006-09-15 | Liquid crystal display plate and related display |
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| Country | Link |
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| CN (1) | CN100449385C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101435938B (en) * | 2007-11-15 | 2010-09-01 | 瀚宇彩晶股份有限公司 | Display device |
| CN101738770B (en) * | 2009-12-28 | 2012-04-25 | 友达光电（苏州）有限公司 | Liquid crystal display (LCD) panel and touch detection method thereof |
| CN102566182A (en) * | 2009-12-28 | 2012-07-11 | 友达光电（苏州）有限公司 | Liquid crystal display panel and touch control detection method thereof |
| WO2016173198A1 (en) * | 2015-04-30 | 2016-11-03 | 小米科技有限责任公司 | Liquid crystal display screen, and pressure measurement method and device |
| CN107003770A (en) * | 2014-12-05 | 2017-08-01 | 希迪普公司 | Display board, touch input device, detection means and detection method from display board detection touch location and touch pressure |
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| JP2001075074A (en) * | 1999-08-18 | 2001-03-23 | Internatl Business Mach Corp <Ibm> | Touch sensor type liquid crystal display device |
| TWI363206B (en) * | 2003-02-28 | 2012-05-01 | Samsung Electronics Co Ltd | Liquid crystal display device |
| JP2005135027A (en) * | 2003-10-28 | 2005-05-26 | Sanyo Electric Co Ltd | Display device with touch input function |
| KR101133753B1 (en) * | 2004-07-26 | 2012-04-09 | 삼성전자주식회사 | Liquid crystal display including sensing element |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101435938B (en) * | 2007-11-15 | 2010-09-01 | 瀚宇彩晶股份有限公司 | Display device |
| CN101738770B (en) * | 2009-12-28 | 2012-04-25 | 友达光电（苏州）有限公司 | Liquid crystal display (LCD) panel and touch detection method thereof |
| CN102566182A (en) * | 2009-12-28 | 2012-07-11 | 友达光电（苏州）有限公司 | Liquid crystal display panel and touch control detection method thereof |
| CN107003770A (en) * | 2014-12-05 | 2017-08-01 | 希迪普公司 | Display board, touch input device, detection means and detection method from display board detection touch location and touch pressure |
| WO2016173198A1 (en) * | 2015-04-30 | 2016-11-03 | 小米科技有限责任公司 | Liquid crystal display screen, and pressure measurement method and device |
| JP2017519252A (en) * | 2015-04-30 | 2017-07-13 | 小米科技有限責任公司Ｘｉａｏｍｉ Ｉｎｃ． | Liquid crystal display screen, pressure measuring method, apparatus, program, and recording medium |
| US9753319B2 (en) | 2015-04-30 | 2017-09-05 | Xiaomi Inc. | Liquid crystal display including display panel that includes wires and protruding spacers |
| RU2635409C2 (en) * | 2015-04-30 | 2017-11-13 | Сяоми Инк. | Liquid crystal display, and also method and device for measuring pressure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100449385C (en) | 2009-01-07 |
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