CN102478982A - Touch display panel - Google Patents
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- CN102478982A CN102478982A CN2010105629242A CN201010562924A CN102478982A CN 102478982 A CN102478982 A CN 102478982A CN 2010105629242 A CN2010105629242 A CN 2010105629242A CN 201010562924 A CN201010562924 A CN 201010562924A CN 102478982 A CN102478982 A CN 102478982A
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Abstract
The invention discloses an embedded touch display panel which is connected to the same read line of a signal processing chip by using a resistor compensating method and can receive different levels of voltages. Under the premise of no increase of channels of the signal processing chip, the touch resolution of the display panel is improved.
Description
Technical field
The present invention relates to a kind of touch-control display panel, particularly relate to a kind of touch-control display panel that improves the touch-control resolution.
Background technology
Now, it is quite universal that display panel has touch controllable function.Usually, display panel adds a contact panel, and realizing its touch controllable function, and the principle of contact panel is divided into resistance-type, condenser type, infrared ray, with surface acoustic wave type or the like.
Fig. 1 shows a kind of contact panel 10 of resistance-type of existing convention, is added on a display panel 16 outward.Contact panel 10 comprises a polymeric substrate 11 and a glass substrate 12; Two relative between two substrates surfaces have conducting wire layer 13; Its surface has tin indium oxide (ITO) coating 14, and many small septs 15 are arranged between the two substrates 11/12 to separate the conducting wire layer 13 of two substrates 11/12.Like figure, touched when polymeric substrate 11 in a certain position, cause resistance value and voltage output value to change, can calculate this by this and press the position.
Electric resistance touch-control panel has advantage of simple technology.But add the contact surface plate of formula, can cause the optics of display panel or the loss of other characteristics, and increase manufacturing cost.For overcoming this problem, existing known techniques proposes a kind of embedded touch-control display panel (In Cell Touch Panel), and its structure is compatible to the technology of existing active-matrix formula LCD, escapable cost.
As shown in Figure 2; TaiWan, China patent publication No. 200729121 is entitled as " display equipment and sensing signal processing apparatus " and discloses a kind of embedded touch-control display panel; It comprises thin-film transistor array base-plate 20, colored filter substrate 21, and liquid crystal layer 22 is arranged between the two substrates.A plurality of down outstanding 23 with other pixel elements (not shown) like gate line, data line; Be formed on the thin-film transistor array base-plate 20 with thin film transistor (TFT) etc.; Wherein, Outstanding 23 can accomplish at same processing step with gate line or data line down, sense wire 24 then is arranged at down outstanding 23 tops, and material can be tin indium oxide (ITO).In addition, black matrix 25, chromatic filter 26 are formed on the colored filter substrate 21, upward outstanding 27 are formed on black matrix 25 tops of part, and common electrode 28 is formed on chromatic filter 26, black matrix 25, colored filter substrate 21, and goes up on outstanding 27.
By this; Go up outstanding 27, common electrode 28, outstanding 23, sense wire 24 constitutes a sensing element down; When pressing, the user cause common electrode 28 to contact with sense wire 24; Then the input voltage Vcom of common electrode is connected to a sensing signal processor (not shown) via sense wire 24 and reads, and can judge contact position by this.
Yet; If promote contact panel resolution, must improve the quantity of sense wire 24, receive the restriction of layout area on the one hand; The pin count of sensing signal processor or the quantity of increase sensing signal processor must be increased on the other hand, so manufacturing cost can be increased.
This shows that above-mentioned existing touch-control display panel obviously still has inconvenience and defective, and demands urgently further improving in structure and use.In order to solve the problem of above-mentioned existence; Relevant manufacturer there's no one who doesn't or isn't seeks solution painstakingly; But do not see always that for a long time suitable design is developed completion, and common product does not have appropriate structure to address the above problem, this obviously is the problem that the anxious desire of relevant dealer solves.Therefore how to found a kind of embedded touch-control display panel, under the condition that does not increase cost, effectively promote its touch-control resolution, also becoming the current industry utmost point needs improved target.
Summary of the invention
The objective of the invention is to, a kind of embedded touch-control display panel is provided, under the condition that does not increase cost, effectively promote its touch-control resolution.
The object of the invention and solve its technical matters and adopt following technical scheme to realize.A kind of touch-control display panel according to the present invention proposes has a thin film transistor base plate, a upper substrate, and a liquid crystal layer is arranged between the two substrates, and this touch-control display panel also comprises; One sensing signal processor has a plurality of pins, and each pin connects a read line; Every read line connects an end of many read lines; The other end of every read line then connects the output terminal of a resistance in series and the input end of this resistance in series connects a sense wire, and every sense wire connects a plurality of sensing elements, wherein; Said sense wire is arranged on this thin film transistor base plate; Said sensing element is arranged between the two substrates, and said the read line that identical read line connected, and connects the resistance in series with different resistance values.
The object of the invention and solve its technical matters and also can adopt following technical measures further to realize.
Aforesaid touch-control display panel, wherein said sensing element are a kind of sensing elements of resistance-type.
Aforesaid touch-control display panel; The sensing element of wherein said resistance-type comprises, and teat is arranged on this thin film transistor base plate; This sense wire is arranged at this time teat top; One black arranged in matrix is on this upper substrate, and teat is arranged on this black matrix top on one, is arranged on this black matrix, this upper substrate and should goes up the teat top with electrode altogether; By this, make this this sense wire of common electrode contact, make the voltage of this common electrode be transmitted back to this sensing signal processor by this sense wire when the user is pressed into sensing element.
Aforesaid touch-control display panel, wherein said sense wire are divided into the sense wire of x direction and the sense wire of y direction, are respectively applied for the x coordinate and the y coordinate of detecting user press points.
Aforesaid touch-control display panel, a kind of capacitive sensing element of wherein said said sensing element.
Aforesaid touch-control display panel, wherein said condenser type comprise this sense wire and are arranged on this thin film transistor base plate, and teat is arranged on this upper substrate top on one, altogether with electrode form should upper substrate with should on above the teat; By this, when the user is pressed into this sensing element, cause the capacitance between this sense wire and this common electrode to change, the output voltage that makes this sense wire be sent to this sensing signal processor changes thereupon.
Aforesaid touch-control display panel, wherein said said sense wire are divided into the sense wire of x direction and the sense wire of y direction, are respectively applied for the x coordinate and the y coordinate of detecting user press points.
Aforesaid touch-control display panel, wherein said sensing element are a kind of sensing elements of photosensitive formula.
Aforesaid touch-control display panel; The sensing element of wherein said said photosensitive formula comprises a photosensitive film transistor and a switching thin-film transistor; This sense wire of source electrode connection of this switching thin-film transistor, grid connect the source electrode of a gate line, this photosensitive film transistor of drain electrode connection; The grid of this photosensitive film transistor is connected a bias voltage circuit with drain electrode, and this bias voltage circuit provides one to be biased into this photosensitive film transistor; By this, when this switching thin-film transistor is unlocked, can read by this sense wire through this switching thin-film transistor by the photocurrent that this photosensitive film transistor produces.
Aforesaid touch-control display panel, the resistance of wherein said resistance in series, be decided by connect the resistance value of sense wire.
Aforesaid touch-control display panel, the resistance value of wherein said sense wire are decided by the size of this touch-control display panel and the material of this sense wire.
Aforesaid touch-control display panel; It also comprises a build-out resistor; The one of which end ground connection other end is connected in series with said read line; The minimum resistance of wherein said resistance in series is more than 5 times of resistance value of this sense wire, and the resistance of this build-out resistor is approximately 2 to 10 times of minimum resistance of said resistance in series.
Aforesaid touch-control display panel, the minimum resistance of wherein said resistance in series are more than 10 times of resistance value of this sense wire, and the resistance of this build-out resistor is approximately 2 to 10 times of minimum resistance of said resistance in series.
Aforesaid touch-control display panel; Wherein said said sense wire is the sense wire of y direction; And each gate line of this thin film transistor base plate also connects a plurality of switching thin-film transistors except that connecting a plurality of pixel thin film transistors; And an end of each switching thin-film transistor couples this sensing element, in order to the x coordinate and the y coordinate of detecting user press points.
The present invention compared with prior art has tangible advantage and beneficial effect.By technique scheme; Touch-control display panel of the present invention has advantage and beneficial effect at least: the embodiment of the invention is utilized the compensation method of resistance; Make same read line of a signal Processing wafer that is connected to an embedded touch display panel; Can receive the not accurate voltage of coordination, not increase under the port number condition of signal Processing wafer, promote the touch-control resolution of display panel.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention; Understand technological means of the present invention in order can more to know; And can implement according to the content of instructions, and for let of the present invention above-mentioned with other purposes, feature and advantage can be more obviously understandable, below special act preferred embodiment; And conjunction with figs., specify as follows.
Description of drawings
Fig. 1 shows that a kind of contact panel of resistance-type of existing convention is added on a display panel synoptic diagram outward.
Fig. 2 shows a kind of embedded touch-control display panel synoptic diagram of existing convention.
Fig. 3 shows the embedded touch display panel synoptic diagram according to the embodiment of the invention.
Fig. 4 shows the touching signals synoptic diagram according to embodiment of the invention touch-control display panel.
Fig. 5 shows the sensing element synoptic diagram according to one embodiment of the invention touch-control display panel.
Fig. 6 shows the sensing element synoptic diagram according to another embodiment of the present invention touch-control display panel.
Fig. 7 shows according to another embodiment of the present invention touch-control display panel synoptic diagram.
Fig. 8 shows the sensing element synoptic diagram according to another embodiment of the present invention touch-control display panel.
Fig. 9 shows according to another embodiment of the present invention touch-control display panel synoptic diagram.
Figure 10 shows the equivalent circuit diagram of a dot structure according to an embodiment of the invention.
10: contact panel 11: polymeric substrate
12: glass substrate 13: the conducting wire layer
14: tin indium oxide 15: sept
16: display panel 20: thin-film transistor array base-plate
21: colored filter substrate 22: liquid crystal layer
23: give prominence to 24 down: sense wire
25: black matrix 26: chromatic filter
27: upward give prominence to 28: common electrode
30: touch-control display panel 31: sensing signal processor
32: thin film transistor base plate 33: upper substrate
34: liquid crystal layer 35: following teat
36: sense wire 37: black matrix
38: go up teat 39: common electrode
40: sensing element 41: photosensitive film transistor
410: grid 412: source electrode
414: drain electrode 42: switching thin-film transistor
420: grid 422: source electrode
424: drain electrode Bias, 1: bias line
Dm-1, Dm: data line G1: gate line
Gn-1, Gn: gate line P1-P2: point
R0-R2: resistance S1-S3: read line
S11-S12: inferior read line S21-S22: inferior read line
S101-S112: sense wire S201-S202: sense wire
SE: sensing element SW: switching thin-film transistor
SW
X: pixel transistor SX1-SXm: sense wire
SY1-Sym: sense wire
Embodiment
Reach technological means and the effect that predetermined goal of the invention is taked for further setting forth the present invention; Below in conjunction with accompanying drawing and preferred embodiment; To its embodiment of touch-control display panel, structure, characteristic and the effect thereof that proposes according to the present invention, specify as after.
Fig. 3 shows the embedded touch display panel according to the embodiment of the invention, and present embodiment is the touch-control display panel of resistance-type, but is not limited thereto, and the touch-control display panel of other form is also applicable.Like figure; Touch-control display panel 30 comprises a sensing signal processor 31, and it has a plurality of pins and connects read line S1, S2, S3 etc. respectively, and every read line connects read line respectively 2 times; For example read line S1 connects time read line S11 and S12, and read line S2 connects time read line S21 and S22.Each time read line connects 6 sense wires, and for example, inferior read line S11 connects sense wire S101-S106, and inferior read line S12 connects sense wire S107-S112.And every sense wire can connect a plurality of sensing elements (not shown).Wherein, One end of 2 read lines of every read line connection connects the resistance in series that the corresponding read line other end then connects different resistance values respectively, is connected with sense wire, for example again; Inferior read line S11 connects resistance in series 15K, and inferior read line S12 connects resistance in series 10K.In addition, read line, inferior read line, resistance in series and sense wire are made on the thin film transistor base plate 32 of touch-control display panel 30.In Fig. 3, to simplify and the clear configuration relation that presents each sense line for asking picture, each pixel element, data line and gate line on the thin film transistor base plate 32 are then ignored and are not shown.Above-mentioned these elements can be with reference to Figure 10, and it shows that two gate lines G n-1, Gn and data line Dm-1, Dm constitute a pixel and comprise a pixel transistor SWx and be used to write pixel voltage and a liquid crystal capacitance Clc and a storage capacitors Cst.Thin film transistor base plate 32 is made up of pel array, and above-mentioned sensing element normally is arranged in some pixel regularly.In addition, also omit at this with thin film transistor base plate 32 corresponding colored filter substrates 21 and do not illustrate.In the present embodiment; Inferior read line roughly is parallel to each other to the data line on the thin film transistor base plate 32 each other; And inferior read line generally perpendicularly carries out similar parallel being connected with read line, and read line then is roughly parallel to the gate line on the thin film transistor base plate 32 each other.
Said structure and existing conventional construction different be in, under the condition that sensing signal processor 31 pin counts do not increase, the sense wire quantity and the resolution that can double above.For example, a read line possibly only connect 6 sense wires in the existing known techniques, yet a read line can connect 12 sense wires or more in the embodiment of the invention.Referring to Fig. 4, it is the touching signals synoptic diagram according to embodiment of the invention touch-control display panel.Certain any sensing element when pushing panel at the sense wire of this press points, will have a magnitude of voltage V
In, for example, its magnitude of voltage equals the voltage V of common electrode
ComAnd be delivered to the magnitude of voltage V of sensing signal processor
Out, according to the law of partial pressure, can calculate by formula:
Wherein R0 is that the resistance value in whole piece sense wire path, resistance value, the R2 that R1 is resistance in series are the resistance value of build-out resistor; Wherein, Build-out resistor R2 can be a fixed resistance or variable resistor, its be sensing signal processor 31 the IC circuit end a resistance, be connected in series with read line; Build-out resistor R2 can be arranged on the circuit board outside the thin film transistor base plate 32 or be integrated in this sensing signal processor 31, but not as limit.
Get back to Fig. 3, as the some P1 and the P2 that push panel, the magnitude of voltage that then is delivered to sensing signal processor is respectively V
Out, 1With V
Out, 2, (the R0 resistance value of supposing both is all 1K, and both are respectively 15K and 10K the R1 resistance value, and R2 is assumed to be 20K, V as follows in calculating
InBe assumed to be 5V):
Sensing signal processor with 8 bits is an example, can discern judgement more than the about 0.02V of pressure reduction, that is the pressure reduction of Vout1 and Vout2 is required to be more than the 0.02V preferably.The pressure reduction of above-mentioned instance reaches 0.46V, and is no problem in the differentiation.Therefore, under the condition that the pin count of sensing signal processor does not increase, the quantity of sense wire doubles, and resolution also doubles thereupon.It should be noted that; The different sensing regions of telling by homogeneous read line not at identical read line; It reads voltage difference and must be large enough to supply sensing signal processor to differentiate (for example more than the 0.02V); So just can reach the purpose that improves resolution, this can accomplish by the resistance of selecting build-out resistor R2, and the end of build-out resistor R2 is a ground connection in the present embodiment.And the selection of its resistance value of build-out resistor R2 is relevant with R0 sense wire resistance with resistance in series R1, and in other words, the selection of build-out resistor R2 is relevant with the factors such as material of the size of display panel, read line (containing time read line and sense wire).Generally speaking the value of R0 will have difference because of the size of different panels; Yet the value of R0 will be significantly less than R1 and R2 in design process, and for example, the value of minimum R1 can be designed to more than 5 times of R0; R2 then is about 2～10 times of minimum R1; In one embodiment, minimum R1 preferred values can be more than 10 times of R0, and R2 is about 2～5 times of minimum R1 value.Notion according to the embodiment of the invention; Each pin of sensing signal processor connects a read line; Every read line can connect N bar time read line, and N is the positive integer more than or equal to 2, and every read line connects the output terminal of a series connection resistance; And the input end of this resistance in series connects many sense wires, and every sense wire connects a plurality of sensing elements; By this, the touch-control resolution can improve N doubly.
Fig. 5 shows the sensing element of electric resistance type touch control display panel according to an embodiment of the invention.Like figure, touch-control display panel 30 comprises thin film transistor base plate 32, upper substrate 33, and liquid crystal layer 34 is arranged between the two substrates.(not shown) such as following teat 35 and other pixel elements such as gate line, data line, thin film transistor (TFT)s is arranged on the thin film transistor base plate 32; Sense wire 36 is arranged at down teat 35 tops; Wherein, Following teat 35 can be accomplished at same processing step with gate line or data line, and sense wire 36 materials comprise tin indium oxide (ITO) or other conductive materials.In addition, black matrix 37 is formed on the upper substrate 33, and last teat 38 is formed on other position on black matrix 37 tops or the upper substrate 33, and common electrode 39 is formed on black matrix 37, upper substrate 33 and goes up teat 38 tops.And, between thin film transistor base plate 32 and the upper substrate 33, many septs (not shown) can be set.By this, following teat 35, sense wire 36, go up teat 38 and constitute a sensing element with common electrode 39, when the user is pressed into sensing element, the voltage V of common electrode
ComBe transmitted back to sensing signal processor by sense wire.
Fig. 6 shows the sensing element of capacitance type touch control display panel according to another embodiment of the present invention.Like figure, touch-control display panel 30 comprises thin film transistor base plate 32, upper substrate 33, and liquid crystal layer 34 is arranged between the two substrates.(not shown) such as sense wire 36 and other pixel elements such as gate line, data line, thin film transistor (TFT)s is arranged on the thin film transistor base plate 32; Its material comprises tin indium oxide (ITO) or other conductive materials, and a driver (not shown) provides input voltage to give sense wire.In addition, last teat 38 is formed on the upper substrate top, and common electrode 39 is formed on upper substrate 33 and last teat 38 tops.And, between thin film transistor base plate 32 and the upper substrate 33, many septs (not shown) can be set.By this; Sense wire 36, last teat 38 constitute a sensing element with common electrode 39; When the user is pressed into sensing element, cause the capacitance between sense wire 36 and the common electrode 39 to change, the output voltage that makes sense wire 36 be sent to sensing signal processor changes thereupon.Wherein, the size of capacitance between sense wire 36 and the common electrode 39, with the dielectric coefficient of liquid crystal layer 34, the area of sense wire 36, and the distance dependent between sense wire 36 and the common electrode 39.The sensing element of this embodiment is a capacitance type sensing element; Common electrode 39 will not contact with sense wire 36 in its operating process; But rely on the distance that changes between the two to detect changes in capacitance; Event is with respect to the common electrode 39 and sense wire 36 necessary face contacts of the resistance-type sensing element of the embodiment of Fig. 5, and the sensing element of Fig. 6 embodiment also is called contactless sensing element.
As shown in Figure 7, if sensing element is Fig. 5 or structure shown in Figure 6, then in one embodiment, on thin film transistor base plate 32, sense wire can be further divided into the sense wire (SX of x direction
1To SX
mDeng) with the sense wire (SY of y direction
1To SY
mDeng), here, y sense of direction survey line can be parallel with data line, is used to detect the x coordinate of user's press points, and x sense of direction survey line can be parallel with gate line, is used to detect the y coordinate of user's press points.What specify is in the embodiment of Fig. 7; If be provided with sensing element in the pixel cell; For example like Fig. 5 or sensing element shown in Figure 6, then this pixel cell (each pixel cell can comprise R, G, B three subpixels) can have at least two sensing cells usually, and one of which is corresponding SY sense wire; Another then is corresponding SX sense wire, respectively X and Y coordinate being positioned.SY sense wire and SX sense wire are arranged at different layers in addition, and are provided with an insulation course therebetween.
Fig. 8 shows the sensing element 40 of photosensitive according to another embodiment of the present invention formula touch-control display panel; Be different from resistance-type shown in Figure 5 (contact) sensing element and condenser type (contactless) sensing element shown in Figure 6, sensing element 40 shown in Figure 8 is the sensing element of a photosensitive formula (optical profile type).Sensing element 40 comprises a photosensitive film transistor 41 and a switching thin-film transistor 42 (non-in order to write the pixel transistor of pixel voltage, figure does not show).The source electrode 422 of switching thin-film transistor 42 connects a sense wire SY
1, grid 420 connects a gate lines G
1, drain electrode 424 connects the source electrode 412 of photosensitive film transistor 41.In addition, the grid 410 of photosensitive film transistor 41 is connected to a bias voltage circuit Bias with drain electrode 414, and 1, bias voltage circuit Bias, 1 provides one to be biased into photosensitive film transistor 41.After switching thin-film transistor 42 is unlocked, press and photocurrent variations that photosensitive film transistor 41 is produced can be through switching thin-film transistor 42 and by sense wire SY via the user
1Read.
Fig. 9 shows according to the read method of another embodiment of the present invention about the sensing element of touch-control display panel; It is different from the touch-control display panel that shown in the embodiment of Fig. 7, need have the design of x and y read line simultaneously, for another does not need to possess simultaneously the design architecture that x and y read line can be detected the xy coordinate.Like figure, sensing element SE can be like Fig. 5, the described sensing element of Fig. 6 or the described photo-sensitive cell of Fig. 8 (for example, photosensitive film transistor).Sensing element SE is (non-in order to write the pixel thin film transistor of pixel voltage via a switching thin-film transistor SW; Figure does not show) the connection sense wire; SY1 for example, its resistance value is R0, likewise; Between sense wire SY1 and the sensing signal processor 31 and be electrically connected with resistance in series 15K (R1) and resistance in series 10K (R1), as previously mentioned.The grid of switching thin-film transistor SW connects a gate lines G n; This gate lines G n also is connected with corresponding a plurality of pixel thin film transistors (figure does not show) simultaneously; When gate lines G n receives high levle voltage, open switching thin-film transistor SW, then the signal of sensing element SE can be read by sense wire SY1.This read method is compared in the touch-control display panel of Fig. 7; The driving for sense wire SX1, SX2... or the like of its y direction of instead; That is to say that Fig. 9 embodiment can orient the xy coordinate by sense wire SY1, SY2...SYm and the gate line of arranging in pairs or groups (gate line) action; That is present embodiment will only need be provided with sense wire SY1, SY2...SYm and sense wire SX1, SX2...SXm need not be set.Above-mentioned Fig. 5, Fig. 6, Fig. 8 only sensing element of illustration touch-control display panel of the present invention can comprise the sensing element of resistance-type, condenser type or photosensitive formula, but are not limited to this, have the sensing element structure of identical or similar principles, also belong to scope of the present invention.
More than, many embodiment utilize the compensation method of resistance according to the present invention, make same read line can receive the not accurate voltage of coordination, under the port number that does not increase process chip (pin count) condition, still can effectively promote the touch-control resolution of display panel.It only is preferred embodiment of the present invention; Not being that the present invention is done any pro forma restriction, though the present invention with the preferred embodiment exposure as above, yet is not in order to limit the present invention; Anyly be familiar with the professional and technical personnel; In not breaking away from technical scheme scope of the present invention, make a little change or be modified to the equivalent embodiment of equivalent variations when the technology contents of above-mentioned announcement capable of using, be the content that does not break away from technical scheme of the present invention in every case;, all still belong in the scope of technical scheme of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (14)
1. a touch-control display panel has a thin film transistor base plate, a upper substrate, and a liquid crystal layer is arranged between the two substrates, it is characterized in that this touch-control display panel also comprises;
One sensing signal processor has a plurality of pins, and each pin connects a read line; Every read line connects an end of many read lines; The other end of every read line then connects the output terminal of a resistance in series and the input end of this resistance in series connects a sense wire, and every sense wire connects a plurality of sensing elements, wherein; Said sense wire is arranged on this thin film transistor base plate; Said sensing element is arranged between the two substrates, and said the read line that identical read line connected, and connects the resistance in series with different resistance values.
2. touch-control display panel according to claim 1 is characterized in that wherein said sensing element is a kind of sensing element of resistance-type.
3. touch-control display panel according to claim 2; The sensing element that it is characterized in that wherein said resistance-type comprises, and teat is arranged on this thin film transistor base plate; This sense wire is arranged at this time teat top; One black arranged in matrix is on this upper substrate, and teat is arranged on this black matrix top on one, is arranged on this black matrix, this upper substrate and should goes up the teat top with electrode altogether; By this, make this this sense wire of common electrode contact, make the voltage of this common electrode be transmitted back to this sensing signal processor by this sense wire when the user is pressed into sensing element.
4. touch-control display panel according to claim 2 is characterized in that wherein said sense wire is divided into the sense wire of x direction and the sense wire of y direction, is respectively applied for the x coordinate and the y coordinate of detecting user press points.
5. touch-control display panel according to claim 1 is characterized in that a kind of capacitive sensing element of wherein said said sensing element.
6. touch-control display panel according to claim 5; It is characterized in that wherein said condenser type comprises this sense wire and is arranged on this thin film transistor base plate; Teat is arranged on above this upper substrate on one, should and be somebody's turn to do above the teat at upper substrate with electrode formation altogether; By this, when the user is pressed into this sensing element, cause the capacitance between this sense wire and this common electrode to change, the output voltage that makes this sense wire be sent to this sensing signal processor changes thereupon.
7. touch-control display panel according to claim 5 is characterized in that wherein said said sense wire is divided into the sense wire of x direction and the sense wire of y direction, is respectively applied for the x coordinate and the y coordinate of detecting user press points.
8. touch-control display panel according to claim 1 is characterized in that wherein said sensing element is a kind of sensing element of photosensitive formula.
9. touch-control display panel according to claim 6; The sensing element that it is characterized in that wherein said said photosensitive formula comprises a photosensitive film transistor and a switching thin-film transistor; This sense wire of source electrode connection of this switching thin-film transistor, grid connect the source electrode of a gate line, this photosensitive film transistor of drain electrode connection; The grid of this photosensitive film transistor is connected a bias voltage circuit with drain electrode, and this bias voltage circuit provides one to be biased into this photosensitive film transistor; By this, when this switching thin-film transistor is unlocked, can read by this sense wire through this switching thin-film transistor by the photocurrent that this photosensitive film transistor produces.
10. touch-control display panel according to claim 1 is characterized in that the resistance of wherein said resistance in series, be decided by connect the resistance value of sense wire.
11. touch-control display panel according to claim 1 is characterized in that the resistance value of wherein said sense wire is decided by the size of this touch-control display panel and the material of this sense wire.
12. touch-control display panel according to claim 1; It is characterized in that it also comprises a build-out resistor; The one of which end ground connection other end is connected in series with said read line; The minimum resistance of wherein said resistance in series is more than 5 times of resistance value of this sense wire, and the resistance of this build-out resistor is 2 to 10 times of minimum resistance of said resistance in series.
13. touch-control display panel according to claim 1, the minimum resistance that it is characterized in that wherein said resistance in series is more than 10 times of resistance value of this sense wire, and the resistance of this build-out resistor is 2 to 10 times of minimum resistance of said resistance in series.
14. touch-control display panel according to claim 1; It is characterized in that wherein said said sense wire is the sense wire of y direction; And each gate line of this thin film transistor base plate also connects a plurality of switching thin-film transistors except that connecting a plurality of pixel thin film transistors; And an end of each switching thin-film transistor couples this sensing element, in order to the x coordinate and the y coordinate of detecting user press points.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090146964A1 (en) * | 2007-12-10 | 2009-06-11 | Jong-Woung Park | Touch sensing display device and driving method thereof |
| CN101655761A (en) * | 2009-09-22 | 2010-02-24 | 友达光电股份有限公司 | Touch-control sensing structure of touch panel and touch sensing method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090146964A1 (en) * | 2007-12-10 | 2009-06-11 | Jong-Woung Park | Touch sensing display device and driving method thereof |
| CN101655761A (en) * | 2009-09-22 | 2010-02-24 | 友达光电股份有限公司 | Touch-control sensing structure of touch panel and touch sensing method thereof |
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