CN101706621A - Touch-control liquid crystal display panel and manufacturing method thereof as well as touch-control liquid crystal display device - Google Patents
Touch-control liquid crystal display panel and manufacturing method thereof as well as touch-control liquid crystal display device Download PDFInfo
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- CN101706621A CN101706621A CN200910246083A CN200910246083A CN101706621A CN 101706621 A CN101706621 A CN 101706621A CN 200910246083 A CN200910246083 A CN 200910246083A CN 200910246083 A CN200910246083 A CN 200910246083A CN 101706621 A CN101706621 A CN 101706621A
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Abstract
The invention provides a touch-control liquid crystal display panel which comprises at least two gate wires and at least two data wires, a second thin film transistor and a third thin film transistor, wherein the gate wires and the data wires are intersected to form pixel regions, and each pixel area is provided with a first thin film transistor and a public voltage input wire, wherein at least one pixel region also comprises a touch-control electrode wire, a reference signal input wire and a reference signal output line; the second thin film transistor is used for controlling the output of a reference signal; the third thin film transistor is used for sensing ambient light; in addition, the third thin film transistor outputs an electric signal into the reference signal output wire by the touch-control electrode wire under the control of the second thin film transistor, and a touch position signal is judged according to the electric signal output by the reference signal output wire. The invention also correspondingly provides a manufacturing method of the touch-control liquid crystal display panel and the touch-control liquid crystal display device comprising the same.
Description
Technical field
The present invention relates to lcd technology, particularly a kind of touch-control liquid crystal display panel, its manufacture method and the touch control type LCD device that comprises this touch-control liquid crystal display panel.
Background technology
Along with the raising of computer utility ability and the progress of display technique, touch control type LCD device is used by people more and more.Touch control type LCD device substitutes mouse or keyboard in traditional man-machine interaction as a kind of new man-machine interaction mode, has characteristics such as simple, convenient.
Existing touch control type LCD device comprises touch detection part, touch screen controller and display panels, wherein, before the touch detection part is installed on display panels, is used to detect user's touch location, and after receiving testing result, exports the touch screen controller to; The touch screen controller exports central processing unit (CPU) to after the touch signal that obtains is converted to contact coordinate; CPU outputting data signals and clock signal are to display panels; Display panels shows according to the data-signal and the clock signal that obtain.Above-mentioned touch control type LCD device has adopted the touch screen controller that is installed on the preceding touch detection part of display panels and is connected with the touch detection part, this just makes the complex structure of touch control type LCD device, and damage easily with the touch detection part of display panels mechanical connection, influence the serviceable life of touch screen, and in the existing touch control type LCD device, be placed on the touch detection part of display panels, mechanical connection complexity between touch screen controller and the display panels, and the machinery assembling easily influences the accuracy of touch point testing result.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of touch-control liquid crystal display panel, can export the signal of expression touch point coordinate.
The object of the present invention is to provide a kind of touch-control liquid crystal display panel, its touch control detection parts and touch screen controller are built in the display panels, and be simple in structure and improved the accuracy of senses touch point coordinate.
The object of the present invention is to provide a kind of manufacture method of touch control LCD (Liquid Crystal Display) panel, wherein the manufacture method of touch control detection parts and touch screen controller is compatible with the manufacture method of display panels.
The invention allows for a kind of touch control type LCD device that comprises above-mentioned touch-control liquid crystal display panel.
For achieving the above object, the invention provides a kind of touch-control liquid crystal display panel, comprise two substrates staggered relatively and the liquid crystal layer between described two substrates, comprise at least two gate lines and at least two data lines on a substrate therein, described gate line and described data line intersect to form pixel region, each pixel region has a first film transistor and common electric voltage incoming line, wherein, at least one described pixel region also comprises: the touch-control electrode wires that is parallel to data line and intersects with the gate line insulation; The reference signal incoming line that is parallel to gate line and intersects with the data line insulation; The reference signal output line that is parallel to data line, touch-control electrode wires and intersects with the gate line insulation; Second thin film transistor (TFT), its grid electrically connect the gate line in the described pixel region, and source electrode electrically connects described touch-control electrode wires, and drain electrode electrically connects described reference signal output line, is used to control the output of reference signal; The 3rd thin film transistor (TFT), its grid electrically connect the reference signal incoming line in the described pixel region, and source electrode and its grid electrically conduct, and drain electrode electrically connects described touch-control electrode wires, is used for surround lighting is detected; And the 3rd thin film transistor (TFT) exports electric signal to the reference signal output line by the touch-control electrode wires via the control of second thin film transistor (TFT), judges the touch location signal by the electric signal of reference signal output line output.
For achieving the above object, the present invention also provides a kind of touch control type LCD device that comprises aforementioned touch-control liquid crystal display panel, wherein also comprise detecting device and CPU: described detecting device, electrically connect with the reference signal output line of touch-control liquid crystal display panel, export the reference signal output line column of output expression touch point coordinate signal to CPU as the row coordinate of touch point; Receive CPU output with the touch-control liquid crystal display panel clock signal synchronous, the gate line that is scanned in the touch-control liquid crystal display panel when determine obtaining expression touch point coordinate signal according to clock signal, and export this gate line be expert to CPU as the row-coordinate of touch point; Described CPU, outputting data signals are to touch-control liquid crystal display panel, and clock signal is to touch-control liquid crystal display panel and detecting device; Row-coordinate and row coordinate according to the touch point of detecting device output show control.
Correspondingly, the present invention also provides a kind of method that is used to make aforementioned touch-control liquid crystal display panel, and this method may further comprise the steps:
On glass substrate, form gate line, common electric voltage incoming line, the grid of reference signal incoming line, thin film transistor (TFT);
Form gate insulator;
Form the channel layer of thin film transistor (TFT) and source, the drain electrode of thin film transistor (TFT) at gate location place, and form data line, touch-control electrode wires and reference signal output line corresponding to thin film transistor (TFT);
Form passivation layer, and on passivation layer, form transparency conducting layer;
With the opposed placement of another substrate, and liquid crystal molecule is injected in sealing between two substrates.
As seen from the above technical solutions, the invention provides a kind of touch-control liquid crystal display panel, comprise the plurality of pixels zone, each pixel region increased the 3rd thin film transistor (TFT) that can carry out opto-electronic conversion, can be according to clock signal conducting of exporting on the gate line or second thin film transistor (TFT) that ends, wherein the 3rd thin film transistor (TFT) obtains the coordinate information of touch point according to the electric current of the light intensity output expression touch point coordinate of sensing by the clock signal that detects electric charge of exporting on the touch-control electrode wires and the gate line that is connected with second thin film transistor (TFT) input; Therefore, touch-control liquid crystal display panel of the present invention can be exported the signal of expression touch point coordinate, and need not to increase extra touch point detection part and touch screen controller, not only simple in structure, its touch control detection parts and touch screen controller are built in the display panels, reduce the complicacy that mechanical assembling connects, and improved the accuracy of the touch point coordinate that detects.The present invention also provides a kind of touch control type LCD device, need not extra touch-screen and the touch control controller installed on display panels, and is simple in structure, and improved the accuracy that detects the touch point coordinate that obtains.Correspondingly, adopt the method that is used to make above-mentioned touch-control liquid crystal display panel provided by the invention, thereby the manufacture method of touch-control parts and touch screen controller is compatible with in the manufacture method of display panels, need not additionally to increase manufacturing process.
Description of drawings
Fig. 1 is the structural representation of a pixel region on the infrabasal plate of touch-control liquid crystal display panel of the present invention.
Fig. 2 is the equivalent circuit diagram of pixel region shown in Figure 1.
Fig. 3 is the process flow diagram of the method for making of touch-control liquid crystal display panel of the present invention.
Fig. 4 a～4e is the side cross-sectional schematic of the display panels of employing manufacture method of the present invention, wherein, and the side view of Fig. 4 d-1 for dissecing, the side view of Fig. 4 d-2 for dissecing along B-B ' direction among Fig. 1 along A-A ' direction among Fig. 1.
Fig. 5 is the structural representation of touch control type LCD device of the present invention.
Embodiment
For make purpose of the present invention, technical scheme, and advantage clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Touch-control liquid crystal display panel provided by the invention comprises opposed upper and lower substrate and is sealed in liquid crystal layer between this upper and lower substrate.The infrabasal plate of touch-control liquid crystal display panel of the present invention comprises many gate lines and many data lines towards the upper surface of liquid crystal layer, and a plurality of pixel regions of intersecting to form of these many gate lines and these many data lines.Below in conjunction with Fig. 1, Fig. 2 touch-control liquid crystal display panel of the present invention is carried out exemplary illustration.Wherein, Fig. 1 is the structural representation of a pixel region on the infrabasal plate of touch-control liquid crystal display panel of the present invention, and Fig. 2 is the equivalent circuit diagram of pixel region shown in Figure 1.
As shown in Figure 1, adjacent first grid polar curve 111 and second grid line 112 intersect to form a pixel region with adjacent first data line 141 and second data line 142 respectively, this pixel region comprises: parallel with gate line respectively common electric voltage (Vc) incoming line 113, reference signal (Vr) incoming line 114, and parallel with data line respectively reference signal (Dref) output line 143 and touch-control electrode wires 144 and touch-control electrode extension 1441.Second grid line 112 is provided with the first film transistor 211, and the structure of this first film transistor 211 is not given unnecessary details with the thin film transistor (TFT) in traditional liquid crystal indicator herein.On first grid polar curve 111 and reference signal incoming line 114, be respectively arranged with second thin film transistor (TFT) 212 and the 3rd thin film transistor (TFT) 213.
Common electric voltage incoming line 113 is parallel with first grid polar curve 111 respectively with reference signal incoming line 114, respectively with first data line 141 and the 142 vertical and insulation cross arrangements of second data line; Reference signal output line 143 is parallel with first data line 141 respectively with touch-control electrode wires 144, respectively with first grid polar curve 111 and the 112 vertical and insulation cross arrangements of second grid line.
The grid of the first film transistor 211 electrically connects second grid line 112, to receive the scanning voltage signal that second grid line 112 provides; The source electrode of the first film transistor 211 electrically connects first data line 141, to receive the data voltage signal that first data line 141 provides; The drain electrode of the first film transistor 211 is electrically connected to a utmost point of liquid crystal capacitance (Clc) and first memory capacitance (Cst1), and the annexation of the first film transistor 211 and liquid crystal capacitance, first memory capacitance is a known technology, does not do and gives unnecessary details.The first film transistor 211 is as on-off element, can be according to sweep signal conducting or the shutoff on the second grid line 112, thus export the data voltage signal on first data line 141 to first memory capacitance 221 and liquid crystal capacitance 220, show to realize image.
The grid of second thin film transistor (TFT) 212 electrically connects first grid polar curve 111, its source electrode electrically connects reference signal output line 143, drain electrode electrically connects touch-control electrode wires 144, touch-control electrode wires 144 and common electric voltage incoming line 113 corresponding positions have an extension 1441 (as shown in fig. 1) along the bearing of trend of common electric voltage incoming line 113, because of extension 1441 and common electric voltage incoming line 113 opposed and the two between have insulation course, so extension 1441 and common electric voltage incoming line 113 constitute two electrodes of second memory capacitance 222 respectively; Certainly, the annexation of second thin film transistor (TFT) 212 also can be: grid electrically connects first grid polar curve 111, its drain electrode electrically connects reference signal output line 143, source electrode electrically connects touch-control electrode wires 144. can be according to the type of second thin film transistor (TFT) of selecting 212, determine that the source electrode of second thin film transistor (TFT) 212 and drain electrode adopt a certain in the above-mentioned annexation, such as, if adopt P type pipe, then source electrode electrically connects touch-control electrode wires 144, and drain electrode electrically connects reference signal output line 143; As if adopting N type pipe, then drain electrode electrically connects touch-control electrode wires 144, and source electrode electrically connects reference signal output line 143. when exporting high level on the first grid polar curve 111, and the grid of second thin film transistor (TFT) 212 obtains a high level, its source electrode and drain electrode conducting; When on the first grid polar curve 111 during output low level, the grid of second thin film transistor (TFT) 212 obtains a low level, its source electrode and drain electrode end. in the present invention, second thin film transistor (TFT) 212 is equivalent to a controllable switch element, can or end according to the level conducting of exporting on the gate line that electrically connects with its grid. the high-low level of output is a clock signal on the first grid polar curve 111. second thin film transistor (TFT) 212 can open and shut off by it, realizes the control function to touching signals.
The utmost point that second memory capacitance 222 electrically connects second thin film transistor (TFT) 212 also electrically connects with the source electrode (or drain electrode) of the 3rd thin film transistor (TFT) 213, is used to store the electric charge of the 3rd thin film transistor (TFT) 213 outputs.
The grid of the 3rd thin film transistor (TFT) 213 and source electrode all electrically connect reference signal incoming line 114, further, electrically conducting of the grid of the 3rd thin film transistor (TFT) 213 and source electrode is to realize by on its source electrode and grid and the insulation course between the two through hole being set, and promptly represents this through hole as 2131 among Fig. 1; Drain electrode electrically connects a utmost point that is made of extension 1441 of second memory capacitance 222; Perhaps, the grid of the 3rd thin film transistor (TFT) 213 and drain electrode electrically connect reference signal incoming line 114, and source electrode connects a utmost point that is made of extension 1441 of second memory capacitance 222.Can be according to the type of the 3rd thin film transistor (TFT) of selecting 213, determine that the source electrode of the 3rd thin film transistor (TFT) 213 and drain electrode adopt a certain in the above-mentioned annexation, such as: if adopt P type pipe, then source electrode electrically connects reference signal incoming line 114, and drain electrode connects a utmost point that is made of extension 1441 of second memory capacitance 222; If adopt N type pipe, then drain electrode connects reference signal incoming line 114, and source electrode connects a utmost point that is made of extension 1441 of second memory capacitance 222.The 3rd thin film transistor (TFT) 213 has amorphous silicon layer, because the photoelectric converting function of amorphous silicon, the 3rd thin film transistor (TFT) 213 can be converted to the external environment light intensity that senses photocurrent and export second memory capacitance 222 to, output photocurrent to the second memory capacitance 222 when just the amorphous silicon layers in the 3rd thin film transistor (TFT) 213 sense the light intensity of external environment stops to export photocurrent when not sensing the light intensity of external environment.In the present invention, the 3rd thin film transistor (TFT) 213 is equivalent to a photo-electric conversion element, is used to detect the external environment light of touch-control liquid crystal display panel, and realizes photoelectric converting function.
When touch action takes place in the user of touch-control liquid crystal display panel of the present invention, the external environment light at this touch location place is blocked, then do not have the external environment light intensity and shine the 3rd thin film transistor (TFT) 213, the 3rd thin film transistor (TFT) 213 stops to export photocurrent, then Fig. 1, Fig. 2 then do not have electric signal output as can be known on the reference signal output line 143.The concrete course of work is as described below:
When touch does not have above-mentioned touch-control liquid crystal display panel, because the grid of the 3rd thin film transistor (TFT) 213 and source (leakage) utmost point electrically connect, so the 3rd thin film transistor (TFT) 213 is equivalent to a diode, has unidirectional on state characteristic, export at reference signal incoming line 114 under the effect of voltage of grid, drain electrode and source electrode conducting, the passage of the 3rd thin film transistor (TFT) 213 is opened, and the reference voltage Vr of reference signal incoming line 114 outputs is to 222 chargings of second memory capacitance; At this moment, the 3rd thin film transistor (TFT) 213 receives external environment illumination, the light intensity that receives is converted to photocurrent exports second memory capacitance 222 to, to 222 chargings of second memory capacitance; Charge stored is relevant with reference voltage Vr and photocurrent on second memory capacitance 222.When the voltage on the first grid polar curve 111 was low level, the grid of second thin film transistor (TFT) 212 received the low level sweep signal, and this moment, the source electrode and the drain electrode of second thin film transistor (TFT) 212 ended.When first grid polar curve 111 output high level, the grid of second thin film transistor (TFT) 212 receives the high level sweep signal, source electrode and drain electrode conducting, the reference signal output line 143 outputs first voltage reference signal Vdref1, Vdref1 is relevant with reference voltage Vr and photocurrent for this first voltage reference signal.
When touching the upper substrate of above-mentioned touch-control liquid crystal display panel, the 3rd thin film transistor (TFT) 213 on the infrabasal plate is under the effect of the reference voltage Vr of reference signal incoming line 114 outputs, drain electrode and source electrode conducting, the passage of the 3rd thin film transistor (TFT) 213 is opened, and the reference voltage Vr of reference signal incoming line 114 outputs is to 222 chargings of second memory capacitance; Because the touch point makes the 3rd thin film transistor (TFT) 213 can't sense external environment illumination, no photocurrent output on the 3rd thin film transistor (TFT) 213; Charge stored is only relevant with reference voltage Vr on second memory capacitance 222. when first grid polar curve output high level, the grid of second thin film transistor (TFT) 212 is a high level, source electrode and drain electrode conducting, the reference signal output line 143 outputs second voltage reference signal Vdref2, this second voltage reference signal Vdref2 is only relevant with reference voltage Vr. and the second voltage reference signal Vdref2 is less than the first voltage reference signal Vdref1.
Because some gate lines of the infrabasal plate of touch-control liquid crystal display panel receive the clock signal of outside input, export the sweep signal of high level one by one according to the clock signal that obtains, just all gate lines have only one to be transfused to the high level sweep signal at each constantly, other gate lines all are transfused to the low level sweep signal, therefore, exported the second voltage reference signal Vdref2 on a certain the reference signal output line 143 when detecting, then with these reference signal output line 143 positions as the row coordinate, with this moment be transfused to high level the gate line position as row-coordinate, determine the coordinate of place, the touch point pixel region of touch-control liquid crystal display panel.
The photo-electric conversion element that the described touch-control liquid crystal display panel of the above embodiment of the present invention will have an environment measuring function to external world promptly the 3rd thin film transistor (TFT) 213 and controllable switch element that touching signals is had a control function promptly second thin film transistor (TFT) 212 be integrated among the display panels, not only can realize exporting the function of expression touch point coordinate signal, and be not easy to form dislocation, thereby can improve the accuracy of senses touch point coordinate than touch control detection parts and the external touch-control liquid crystal display panel of touch screen controller.
The invention allows for a kind of manufacture method of making above-mentioned touch-control liquid crystal display panel.Please refer to Fig. 3 and Fig. 4 a～4e below.Wherein, Fig. 3 is the process flow diagram of the manufacture method of touch-control liquid crystal display panel of the present invention; Fig. 4 a～4e is the side cross-sectional schematic of the display panels of employing manufacture method of the present invention.
In the present embodiment, be that example describes with the pixel region shown in Fig. 1.Pixel region among Fig. 1 is dissectd along A-A ', and its cut-open view is shown in Fig. 4 e.
Now in conjunction with Fig. 1, Fig. 4 a～4e with reference to figure 3, the manufacture method of touch-control liquid crystal display panel of the present invention is described, specific as follows:
Step 301: the grid that on glass substrate, forms gate line, common electric voltage incoming line, reference signal incoming line, thin film transistor (TFT).
With reference to figure 4a, at first the upper surface at a glass substrate 10 utilizes physical vaporous deposition deposition one deck the first metal layer 110, the first metal layer is exposed, technologies such as etching, form the first grid polar curve 111 shown in Fig. 1 respectively, second grid line 112, common electric voltage incoming line 113 and reference signal incoming line 114, and lay respectively at second grid line 112, the grid of the first film transistor 211 on first grid polar curve 111 and reference signal incoming line 114 relevant positions, the grid of the grid of second thin film transistor (TFT) 212 and the 3rd thin film transistor (TFT) 213, this is first years old, two, the grid of three thin film transistor (TFT)s is respectively second grid line 112, the part of first grid polar curve 111 and reference signal incoming line 114.Further, this first metal layer can be aluminium, silver, copper, molybdenum or other metal or alloy, and that for example the first metal layer adopts in the embodiments of the invention is aluminium rubidium alloy (AlNd).Further, this first grid polar curve 111, second grid line 112, common electric voltage incoming line 113 and reference signal incoming line 114 are distinguished parallel.
Step 302: form gate insulator.
With reference to figure 4b, utilize chemical vapour deposition technique or with upper surface and the sidewall thereof of physical vaporous deposition, and the upper surface of segment glass substrate 10 forms gate insulator 120 at the upper surface of gate line 111,112, common electric voltage incoming line 113, reference signal incoming line 114 and sidewall thereof, first, second and third film crystal tube grid.
Step 303: form source, drain electrode and the source of thin film transistor (TFT), the channel layer between the drain electrode, and data line, touch-control electrode wires and reference signal output line.
With reference to figure 4c, the upper surface of the gate insulator 120 that forms in step 302 and sidewall thereof deposited amorphous silicon layer 130 and second metal level 140. successively utilize known exposure, technologies such as etching, (with reference to figure 1) is respectively at the first film transistor 211, second thin film transistor (TFT) 212, form the channel layer and the corresponding source of thin film transistor (TFT) with gate insulator 120 upper surfaces of the grid corresponding position of the 3rd thin film transistor (TFT) 213, drain electrode. because the side view that Fig. 4 a～4e dissects along A-A ' for the pixel region among Fig. 1, so the i.e. cross-sectional side elevational view of representing among Fig. 4 c of the 3rd thin film transistor (TFT) 213.
Simultaneously, in this operation, utilize technologies such as known exposure, etching equally, make second metal level 140 form data line 141,142, reference signal output line 143 and touch-control electrode wires 144 (as shown in fig. 1).Wherein, data line 141,142, reference signal output line 143 and touch-control electrode wires 144 are parallel respectively.
Simultaneously, in this operation, utilize technologies such as known exposure, etching equally, make second metal level 140 form extension 1441 at upper surface with the gate insulator 120 of common electric voltage incoming line 113 corresponding positions, on this extension 1441 and the common electric voltage incoming line 113 and its opposed part and between gate insulator constitute second memory capacitance 222.Meanwhile, form first memory capacitance (not shown) identical with function in traditional display panels.The manufacture method of this second memory capacitance 222 is identical with the manufacture method of first memory capacitance 221, does not repeat them here.
Further, in the present embodiment, as shown in Fig. 1 and Fig. 4 c, the source of the 3rd thin film transistor (TFT) 213 (leakage) utmost point is by a through hole 2131 that the penetrates gate insulator 120 reference signal incoming line 114 that electrically conducts, promptly the source of the 3rd thin film transistor (TFT) 213 (leakage) utmost point and its grid electrically conduct, and leak (source) utmost point and electrically connect touch-control electrode wires 144.
Further, the source of second thin film transistor (TFT) 212 (leakage) utmost point electrically connects touch-control electrode wires 144, leaks (source) utmost point and electrically connects reference signal output line 143.
Simultaneously, the connected mode of the first film transistor 211 repeats no more with the connected mode of thin film transistor (TFT) in traditional display panels herein.
Step 304: form passivation layer, transparency conducting layer;
With reference to figure 4d-1, the part upper surface of the upper surface of the amorphous silicon layer 130 that forms in step 303, the upper surface of second metal level 140 and sidewall and gate insulator 120 is deposit passivation layer 150 successively, and transparency conducting layer 170 in conjunction with Fig. 1.Wherein, this transparency conducting layer 170 is tin indium oxide (ITO).Fig. 4 d-1 shows the side view that dissects along A-A ' direction among Fig. 1, shows the process flow diagram that forms second thin film transistor (TFT) 212.In like manner, identical with the forming process of second thin film transistor (TFT) 212, the technological process that forms the first film transistor 211 also can be represented with Fig. 4 d-1, does not do herein and gives unnecessary details.
Again in conjunction with Fig. 1 with reference to figure 4d-2, this figure is the side view that B-B ' direction is dissectd in Fig. 1, shows the process flow diagram that forms the 3rd thin film transistor (TFT) 213.With first, what second thin film transistor (TFT) was different is, after forming transparency conducting layer 170, by known exposure, develop, etch process, source at the 3rd thin film transistor (TFT), the grid corresponding position passes passivation layer 150 and gate insulator 120 forms through hole 2131, then at these through hole 2131 corresponding position the first metal layers 110 (being corresponding reference signal incoming line 114) upper surface and the passivation layer 150 at this place and the sidewall of gate insulator 120, and second metal level 140 (i.e. the source electrode of corresponding the 3rd thin film transistor (TFT)) upper surface and the passivation layer 150 at this place and the sidewall of gate insulator 120 all cover transparency conducting layer 170, and then source electrode and the grid through this step the three thin film transistor (TFT)s 213 electrically conducts by through hole 2131 and transparency conducting layer 170 wherein.
Preferably, embodiments of the invention can use the technology (COA:Color filter on Array) of colored filter on array base palte, the look resistance layer that promptly forms colored filter is deposited between passivation layer 150 and the transparency conducting layer 170, shown in 160 among Fig. 4 e.Certainly, this look resistance layer 160 also can be arranged on the lower surface of the upper substrate of display panels.
So far, the infrabasal plate manufacturing of the display panels of the embodiment of the invention is finished.
Step 305: with another substrate is the opposed placement of upper substrate, and liquid crystal molecule is injected in sealing between two substrates.
With reference to figure 4e, will make another relative substrate of the infrabasal plate finish 100 with step 304 is that upper substrate 200 is staggered relatively, and liquid crystal molecule is injected in sealing between two substrates. so far, the touch-control liquid crystal display panel of the embodiment of the invention is promptly made and is finished.
The invention allows for a kind of touch control type LCD device that comprises the touch-control liquid crystal display panel that preceding method manufactures.Fig. 5 is the structural representation of a kind of touch control type LCD device of the present invention.Dotted arrow among Fig. 5 represents that clock signal flows to, and solid arrow represents that data-signal flows to.Now in conjunction with Fig. 5, the structure of touch control type LCD device of the present invention is described, specific as follows:
Touch control type LCD device of the present invention comprises: CPU403, detecting device 402 and have the touch-control liquid crystal display panel 401 of above-mentioned lower substrate structure.Touch-control liquid crystal display panel 401 receives the clock signal of CPU403 output, and the signal that the light intensity that senses is converted to expression touch point coordinate exports detecting device 402 to, also can show according to the data-signal of CPU403 output.Detecting device 402, the infrabasal plate of connection touch-control liquid crystal display panel 401 is determined the row coordinate of touch point and is exported CPU403 to according to the signal of the expression touch point coordinate that obtains; Receive and touch-control liquid crystal display panel 401 clock signal synchronous, determine the row-coordinate of touch point and export CPU403 to according to clock signal.The CPU403 outputting data signals is to touch-control liquid crystal display panel 401, and clock signal is to touch-control liquid crystal display panel 401 and detecting device 402, shows control according to the row-coordinate and the row coordinate of the touch point of detecting device 402 outputs.
Touch-control liquid crystal display panel 401 comprises infrabasal plate, liquid crystal layer and the upper substrate of above-mentioned touch-control liquid crystal display panel.Sealing liquid crystal shows according to the infrabasal plate of touch-control liquid crystal display panel and the voltage difference between the upper substrate between infrabasal plate and upper substrate; Receive the clock signal of CPU403 output, the information that the light intensity that senses is converted to expression touch point coordinate exports detecting device 402 to.
Detecting device 402 connects the reference signal output line of the infrabasal plate of touch-control liquid crystal display panel, and the row coordinate that the reference signal output line of touch point coordinate signal is expert at and is defined as the touch point is represented in output; The clock signal that detecting device 402 receives is synchronous with the clock signal of the infrabasal plate gate line that exports touch-control liquid crystal display panel to, export the gate line of high level when determining to detect reference signal output line output expression touch point coordinate signal, this gate line column is defined as the row-coordinate of touch point according to clock signal; Detecting device 402 exports the row-coordinate and the row coordinate of touch point to CPU403, so that CPU403 shows control.The expression touch point coordinate signal of reference signal output line output is the different electric signal of reference signal output line output.
In sum, more than be preferred embodiment of the present invention only, be not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. touch-control liquid crystal display panel, comprise two substrates staggered relatively and the liquid crystal layer between described two substrates, comprise at least two gate lines and at least two data lines on a substrate therein, described gate line and described data line intersect to form pixel region, each pixel region has a first film transistor and common electric voltage incoming line, it is characterized in that at least one described pixel region also comprises:
The touch-control electrode wires that is parallel to data line and intersects with the gate line insulation;
The reference signal incoming line that is parallel to gate line and intersects with the data line insulation;
The reference signal output line that is parallel to data line, touch-control electrode wires and intersects with the gate line insulation;
Second thin film transistor (TFT), its grid electrically connect the gate line in the described pixel region, and source electrode electrically connects described touch-control electrode wires, and drain electrode electrically connects described reference signal output line, is used to control the output of reference signal;
The 3rd thin film transistor (TFT), its grid electrically connect the reference signal incoming line in the described pixel region, and source electrode and its grid electrically conduct, and drain electrode electrically connects described touch-control electrode wires,, be used for surround lighting is detected;
Wherein, the 3rd thin film transistor (TFT) exports electric signal to the reference signal output line by the touch-control electrode wires via the control of second thin film transistor (TFT), judges the touch location signal by the electric signal of reference signal output line output.
2. touch-control liquid crystal display panel according to claim 1 is characterized in that, described touch-control electrode wires further comprises an extension, the opposed and insulation of the part on described extension and the described common electric voltage incoming line.
3. touch-control liquid crystal display panel according to claim 2 is characterized in that, the part on described extension and the corresponding common electric voltage incoming line constitutes the two poles of the earth of one second memory capacitance respectively.
4. touch-control liquid crystal display panel according to claim 1 is characterized in that,
Electrically conduct by a through hole between the source electrode of described the 3rd thin film transistor (TFT) and its grid.
5. touch-control liquid crystal display panel according to claim 3 is characterized in that, described the 3rd thin film transistor (TFT) has photoelectric converting function.
6. touch-control liquid crystal display panel according to claim 5 is characterized in that, the photosignal that is changed into by described the 3rd thin film transistor (TFT) is stored to second memory capacitance.
7. a touch control type LCD device is characterized in that, this device comprises: aforementioned 1 to 6 each described touch-control liquid crystal display panel.
8. according to the described touch control type LCD device of claim 7, it is characterized in that this device also comprises detecting device and CPU:
Described detecting device electrically connects with the reference signal output line of touch-control liquid crystal display panel, exports the reference signal output line column of output expression touch point coordinate signal to CPU as the row coordinate of touch point; Receive CPU output with the touch-control liquid crystal display panel clock signal synchronous, the gate line that is scanned in the touch-control liquid crystal display panel when determine obtaining expression touch point coordinate signal according to clock signal, and export this gate line be expert to CPU as the row-coordinate of touch point;
Described CPU, outputting data signals are to touch-control liquid crystal display panel, and clock signal is to touch-control liquid crystal display panel and detecting device; Row-coordinate and row coordinate according to the touch point of detecting device output show control.
9. method that is used to make touch-control liquid crystal display panel as claimed in claim 1, this method may further comprise the steps:
Step 301: on glass substrate, form gate line, common electric voltage incoming line, the grid of reference signal incoming line, thin film transistor (TFT);
Step 302: form gate insulator;
Step 303: form the channel layer of thin film transistor (TFT) and source, the drain electrode of thin film transistor (TFT) at gate location place, and form data line, touch-control electrode wires and reference signal output line corresponding to thin film transistor (TFT);
Step 304: form passivation layer, and on passivation layer, form transparency conducting layer;
Step 305: with the opposed placement of another substrate, and liquid crystal molecule is injected in sealing between two substrates.
10. method according to claim 9 is characterized in that, described step 304 further is included in the look resistance layer that forms colored filter between passivation layer and the transparency conducting layer respectively.
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| CN2009102460831A CN101706621B (en) | 2009-12-01 | 2009-12-01 | Touch-control liquid crystal display panel and manufacturing method thereof as well as touch-control liquid crystal display device |
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