CN203366282U - Touch screen and display device - Google Patents
Touch screen and display device Download PDFInfo
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- CN203366282U CN203366282U CN 201320456565 CN201320456565U CN203366282U CN 203366282 U CN203366282 U CN 203366282U CN 201320456565 CN201320456565 CN 201320456565 CN 201320456565 U CN201320456565 U CN 201320456565U CN 203366282 U CN203366282 U CN 203366282U
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Abstract
The utility model discloses a touch screen and a display device. At least one grid signal line in an array substrate serves as a touch scanning line; the array substrate comprises a touch reading line which is arranged provided with the touch scanning line in a staggered mode; a light-sensitive unit and a touch switch unit are arranged in an area limited defined by the touch scanning line and the touch reading line; the light-sensitive unit and the touch switch unit are connected with the touch scanning line; the light-sensitive unit is connected with the touch reading line through the touch switch unit; when a scanning signal is loaded on the touch scanning line, the light-sensitive unit is positioned in a turn-on state through illumination and outputs a control signal to the touch switch unit; the control signal controls the touch switch unit to output a touch sensing signal to the touch reading line, so that an optical touch function is realized. Compared with a capacitive embedded touch screen, the touch screen has the advantage that the problems of signal interference and signal delay are solved during as for a large size.
Description
Technical field
The utility model relates to the touch screen technology field, relates in particular to a kind of touch-screen and display device.
Background technology
Along with the develop rapidly of display technique, touch-screen (Touch Screen Panel) spreads all in people's life gradually.At present, according to the principle classification, touch-screen roughly comprises: resistive touch screen, capacitive touch screen, optical touch screen etc.According to forming textural classification, touch-screen roughly comprises: touch-screen (Out-cell touch panel), touch-screen (On-cell touch panel), the touch-screen of touch-screen on display panel that touch-screen hangs over outward on display panel are embedded in the touch-screen (In-cell touch panel) in panel.Wherein, touch-screen is embedded in the thickness that structure in panel both can attenuate touch-screen integral body, can greatly reduce again the cost of manufacture of touch-screen, is subject to each large panel producer favor.
At present, mainly, by the mode of resistance-type, condenser type or optical profile type, realize that touch-screen is embedded in the design of panel inside.Wherein, resistance-type belongs to the low side sensing technology, and the product General Life of producing is shorter; The condenser type development is comparatively fast also enjoyed great popularity, but capacitive touch screen mainly is applicable to the display device of small-medium size, the product below 10 cun or 10 cun for example, for the display device of large-size, capacitive touch screen can produce that signal disturbs and the problem of signal delay.
The utility model content
The utility model embodiment provides a kind of touch-screen and display device, in order to the signal that solves the large scale touch-screen, disturbs and the problem of signal delay.
A kind of touch-screen that the utility model embodiment provides, comprise the array base palte with many signal lines;
At least one signal line in described array base palte is as the touch-control sweep trace;
Described array base palte has the touch-control read line staggered with described touch-control sweep trace;
Include photosensitive unit and touch switch unit in described touch-control sweep trace and described touch-control read line limited area, wherein,
Described photosensitive unit all is connected with described touch-control sweep trace with described touch switch unit, and described photosensitive unit is connected with described touch-control read line by described touch switch unit; When described touch-control sweep trace loads sweep signal, by illumination, make described photosensitive unit in opening, described photosensitive unit is to described touch switch unit output control signal, and described control signal is controlled described touch switch unit to described touch-control read line output touch sense signals.
A kind of display device that the utility model embodiment provides, comprise the touch-screen that the utility model embodiment provides.
The beneficial effect of the utility model embodiment comprises:
A kind of touch-screen and display device that the utility model embodiment provides, using at least one signal line in array base palte as the touch-control sweep trace, array base palte has the touch-control read line staggered with the touch-control sweep trace, in touch-control sweep trace and touch-control read line limited area, includes photosensitive unit and touch switch unit; Wherein, photosensitive unit all is connected with the touch-control sweep trace with the touch switch unit, and photosensitive unit is connected with the touch-control read line by the touch switch unit; When the touch-control sweep trace loads sweep signal, by illumination, make photosensitive unit in opening, this photosensitive unit is to touch switch unit output control signal, control signal is controlled the touch switch unit to touch-control read line output touch sense signals, realized the optical touch control function, with respect to the embedded touch-screen of condenser type, can not produce the problem of signal interference and signal delay when large scale.
The accompanying drawing explanation
One of structural representation of array base palte in the touch-screen that Fig. 1 provides for the utility model embodiment;
The sectional view of the touch-screen that Fig. 2 provides for utility model embodiment;
The working timing figure of the touch-screen that Fig. 3 provides for the utility model embodiment;
In the touch-screen that Fig. 4 provides for the utility model embodiment two of the structural representation of array base palte.
Embodiment
Below in conjunction with accompanying drawing, the touch-screen that the utility model embodiment is provided and the embodiment of display device are described in detail.
A kind of touch-screen that the utility model embodiment provides, as shown in Figure 1, comprise and have many signal line Gate n (n=1,2, array base paltes 3......);
At least one signal line Gate n in array base palte (n=1,2,3......) as touch-control sweep trace Scan m (m=1,2,3......);
Array base palte have the touch-control read line Read out n staggered with touch-control sweep trace Scan m (n=1,2,3......);
Include photosensitive unit 102 and touch switch unit 103 in touch-control sweep trace Scan m and touch-control read line Read out n limited area; Wherein,
It should be noted that, the above-mentioned touch-screen that the utility model embodiment provides, have illumination to refer to that touch-screen has touch, and unglazed photograph refers to the touch-screen no touch.
Further, in the above-mentioned touch-screen provided at the utility model embodiment, as shown in Figure 1, also be provided with on array base palte and be a plurality of pixel cells 101 that matrix is arranged, in the specific implementation, touch-control read line Read out n can be between the pixel cell 101 of adjacent columns.
Further, in the above-mentioned touch-screen provided at the utility model embodiment, as shown in Figure 2, also comprise: with the subtend substrate that array base palte is oppositely arranged, the subtend real estate has black matrix 104 to a side of array base palte;
The figure of black matrix 104 at least has open area at the region division corresponding with photosensitive unit 102, and extraneous light just can shine photosensitive unit 102 from this open area like this, realizes touch controllable function.
In the specific implementation, the above-mentioned touch-screen that the utility model embodiment provides, can being applied to colored filter, to be arranged on the subtend substrate relative with array base palte be the structure of color membrane substrates; Certainly, also can be applied to colored filter and be arranged on the structure in array base palte, at this, not do restriction.
Particularly, in the above-mentioned touch-screen provided at the utility model embodiment, in the specific implementation, as shown in Figure 1, sensitization subelement 102 can comprise a sensitization transistor T FT1; The source electrode of this sensitization transistor T FT1 is connected with touch-control sweep trace Scan m, the grid of sensitization transistor T FT1 all is connected with touch switch unit 103 with drain electrode, particularly, the grid of sensitization transistor T FT1 can be connected with touch switch unit 103 respectively with drain electrode, also can by the grid of sensitization transistor T FT1 with touch switch unit 103, be connected again after drain electrode links together, do not do restriction at this.
Particularly, the principle of work of this sensitization transistor T FT1 is: irradiation sensitization transistor T FT1 is being arranged, and when there is potential difference (PD) in the source of sensitization transistor T FT1 between leaking, in the active layer of this sensitization transistor T FT1, the charge carrier number can increase rapidly, produce larger photocurrent between the source electrode of sensitization transistor T FT1 and drain electrode, now photosensitive unit in opening; Irradiation sensitization transistor T FT1 is being arranged, but between the source electrode of sensitization transistor T FT1 and drain electrode while not having potential difference (PD), between sensitization transistor T FT1 source electrode and drain electrode, do not having obvious electric current to produce; Whether when there is no irradiation sensitization transistor T FT1, in the active layer of this sensitization transistor T FT1, the charge carrier number is less, and sensitization transistor T FT1 is in closed condition, between the source electrode of sensitization transistor T FT1 and drain electrode, exist the potential difference (PD) can generation current.And, when touch-control sweep trace Scan m loads sweep signal, between the source electrode of sensitization transistor T FT1 and drain electrode, just can have potential difference (PD).
To sum up, only have and load sweep signal as touch-control sweep trace Scan m, and when this sensitization transistor T of irradiation FT1 is arranged, sensitization transistor T FT1 just has control signal output.Certainly photosensitive unit can be also other structures, at this, does not do restriction.
Particularly, in the touch-screen provided at the utility model embodiment, the sensitization transistor can be infrared sensitization transistor, can certainly, for realizing other sensitization transistor of technical solutions of the utility model, at this, not do restriction.
Preferably, in the touch-screen provided at the utility model embodiment, as shown in Figure 1, specifically can comprise a thin film transistor (TFT) TFT2 for the touch switch unit 103 that connects photosensitive unit 102 and touch-control read line Read out n, wherein, the grid of this thin film transistor (TFT) TFT2 is connected with photosensitive unit 102, and the drain electrode of thin film transistor (TFT) TFT2 is connected with touch-control read line Read out n, and the source electrode of thin film transistor (TFT) TFT2 is connected with touch-control sweep trace Scan m.Certainly the touch switch unit can be also other structures, at this, does not do restriction.
It should be noted that the transistorized source electrode in the utility model embodiment and drain and do not do concrete differentiation, can exchange between source-drain electrode.
And, in the touch-screen provided at the utility model embodiment, as shown in Figure 1, when touch switch unit 103 is thin film transistor (TFT) TFT2, when photosensitive unit 102 is sensitization transistor T FT1; The source electrode of sensitization transistor T FT1 is connected with touch-control sweep trace Scan m, and the grid of sensitization transistor T FT1 all is connected with the grid of thin film transistor (TFT) TFT2 with drain electrode.When photosensitive unit 102 outputs to control signal as the grid of the thin film transistor (TFT) TFT2 of touch switch unit 103 and is more than or equal to the threshold voltage of the grid of thin film transistor (TFT) TFT2, thin film transistor (TFT) TFT2 is in opening, if now between the source electrode of this thin film transistor (TFT) TFT2 and drain electrode, have potential difference (PD), generation current between the source electrode of this thin film transistor (TFT) TFT2 and drain electrode, to touch-control read line Read out n output touch sense signals.
To sum up, photosensitive unit only when the touch-control sweep trace loads sweep signal (when the touch-control sweep trace is in noble potential) just likely export control signal, the touch switch unit only just can be in opening when the control signal of photosensitive unit output is more than or equal to the threshold voltage of opening the touch switch unit, and all the other times are all in closed condition.Only when the touch-control sweep trace loads sweep signal, the touch switch unit just may be in opening.
Therefore, to directly with the touch-control sweep trace, be connected as the source electrode of the thin film transistor (TFT) of touch switch unit, input high potential signal with the source electrode that high potential signal alignment thin film transistor (TFT) is set separately compares always, make thin film transistor (TFT) only its during likely in opening its source electrode just can be transfused to high potential signal, can save like this power consumption of touch-screen.And, as everyone knows, thin film transistor (TFT) still has leakage current to exist when closed condition, its size is directly proportional to the source electrode of thin film transistor (TFT) and the potential difference (PD) between drain electrode, the high potential signal line is set separately to be connected with the thin film transistor (TFT) as the touch switch unit, can make the source electrode of this thin film transistor (TFT) always in noble potential, cause thin film transistor (TFT) to produce larger leakage current and flow to the touch-control read line, thereby reduced the sensitivity of touch-screen.And, in the touch-screen that the utility model embodiment provides, will directly with the touch-control sweep trace, be connected as the source electrode of the thin film transistor (TFT) of touch switch unit, only at it, its source electrode just can be in noble potential during likely in opening to make thin film transistor (TFT).Therefore, to directly with the touch-control sweep trace, be connected as the source electrode of the thin film transistor (TFT) of touch switch unit, with the high potential signal line is set separately, the source electrode of thin film transistor (TFT) is compared always in noble potential, can be improved the sensitivity of touch-screen, and then improve the signal to noise ratio (S/N ratio) of touch-screen.
, will directly with the touch-control sweep trace, be connected and can also save the high potential signal line that independent setting is connected with its source electrode as the source electrode of the thin film transistor (TFT) of touch switch unit simultaneously, thereby guarantee the aperture opening ratio of touch-screen.
In the specific implementation, can be with all parts in the thin film transistor (TFT) of existing control pixel cell switch in array base palte with layer preparation as all parts of the thin film transistor (TFT) of touch switch unit, need not increase new preparation technology like this, only need the composition of each rete corresponding to change to realize, save production cost, improved production efficiency.Certainly in the specific implementation, touch switch can be also other structures, at this, is not described further.
Below in conjunction with sequential chart as shown in Figure 3, be specially sensitization transistor T FT1 with photosensitive unit as shown in Figure 1, the structure that the touch switch unit is specially thin film transistor (TFT) TFT2 is example, and the specific works principle of the touch-screen that the utility model embodiment is provided is briefly introduced.
In Fig. 3,201,202,203 are respectively signal line Gate n-1, Gate n, the waveform input signal figure of Gate n+1, Gate n is as the touch-control sweep trace, the signal output waveform figure of 204 read line of touch-control while being irradiation sensitization transistor T FT1 Read out n, the 205 signal output waveform figure that are touch-control read line Read out n during without irradiation sensitization transistor T FT1.
At the first period T1, signal line Gate n-1201 is in noble potential V
gh, signal line Gate n202 is that the touch-control sweep trace is in electronegative potential V
gl, signal line Gate n+1203 is also in electronegative potential V
glthere do not is potential difference (PD) between the source electrode of sensitization transistor T FT1 and drain electrode and between the source electrode of thin film transistor (TFT) TFT2 and drain electrode, have or not irradiation sensitization transistor T FT1, sensitization transistor T FT1 does not have control signal to output to thin film transistor (TFT) TFT2, so touch-control read line Read out n does not have touch sense signals output.
At the second period T2, signal line Gate n-1201 and Gate n+1203 are in electronegative potential V
gl, signal line Gate n202 is that the touch-control sweep trace is in noble potential V
gh, between the source electrode of sensitization transistor T FT1 and drain electrode and between the source electrode of thin film transistor (TFT) TFT2 and drain electrode, have potential difference (PD).If now irradiation sensitization transistor T FT1, produce photocurrent between the transistorized source-drain electrode of sensitization, be photosensitive unit in opening, the signal that sensitization transistor T FT1 inputs its source electrode using the touch-control sweep trace outputs to the grid of thin film transistor (TFT) TFT2 as control signal; When control signal is more than or equal to the grid voltage of thin film transistor (TFT) TFT2, thin film transistor (TFT) TFT2 is in opening, and the signal that thin film transistor (TFT) TFT2 inputs its source electrode using the touch-control sweep trace outputs to touch-control read line Read out n as touch sense signals; When without irradiation sensitization transistor T FT1, sensitization transistor T FT1 is in closed condition, and sensitization transistor T FT1 does not have control signal to output to thin film transistor (TFT) TFT2, so touch-control read line Read out n does not have touch sense signals output.
At the 3rd period T3, signal line Gate n-1201 is in electronegative potential V
gl, signal line Gaten202 is that the touch-control sweep trace is also in electronegative potential V
gl, signal line Gate n+1203 is in noble potential V
ghthere do not is potential difference (PD) between the source electrode of sensitization transistor T FT1 and drain electrode and between the source electrode of thin film transistor (TFT) TFT2 and drain electrode, have or not irradiation sensitization transistor T FT1, sensitization transistor T FT1 does not have control signal output, so touch-control read line Read out n does not have touch sense signals output.
Usually, the touch-control precision of touch-screen is usually at grade, and the display precision of array base palte is usually at micron order, can find out, the touch-control sweep trace that touch screen is required and touch-control read line show than array base palte many that required drive wire (data signal line and signal line) will be few, therefore, in the touch-screen provided at the utility model embodiment, when setting touch read line and touch-control sweep trace, spacing between generally can each touch-control sweep trace is set to identical, and the spacing between each touch-control read line is set to identical.
Best, it is identical that the spacing between can each touch-control sweep trace and the spacing between each touch-control read line are set to, to unify the touch-control precision of touch-screen.
Further, while in array base palte, realizing the touch-control read line between the pixel cell of adjacent columns, data signal line in each touch-control read line and array base palte can be arranged and mutually insulated with layer, prepare the touch-control read line with its mutually insulated in each data signal line of preparation, like this, do not need to increase extra preparation section when preparing array base palte, only need to can form the figure of data signal line and touch-control read line by a composition technique, can save preparation cost, the improving product added value.Certainly can prepare respectively touch-control read line and data signal line, at this, not do restriction.
Preferably, in order to guarantee to greatest extent the aperture opening ratio of large-sized touch-screen, dot structure in the array base palte of the touch-screen that the utility model embodiment provides can adopt double-gate structure in the specific implementation, as shown in Figure 4, Data n (n=1 wherein, 2, 3......) mean the data signal line of array base palte, Gaten (n=1, 2, 3......) mean the signal line of array base palte, not shown photosensitive unit and touch switch unit in Fig. 4, in double-gate structure, be provided with on array base palte and be a plurality of pixel cells that matrix is arranged, there are two signal lines between the pixel cell of the adjacent lines on array base palte, for example Gate1 and Gate2, Gate3 and Gate4, Gate5 and Gate6, and every two adjacent row pixel cells are row, share a data signal line Date1 between this two row pixel cell, Date2, Date3.The signal line by the quantity that doubles by double-gate structure on array base palte, reduced the quantity of data signal line and source drive IC, thereby reduce the display holistic cost.
Further, double-gate structure as shown in Figure 4, by the signal line of the adjacent two row pixel cells of change and the position of TFT switch, can save the position of data signal line between the adjacent pixel unit row.Like this, as shown in Figure 4, just can each touch-control read line Read out n be set the gap location between the adjacent pixel unit row, it is the specifically gap location between adjacent pixel cell row of each touch-control read line Read out n, can further reduce the occupancy of pixel cell like this, guarantee that touch-screen has larger aperture opening ratio.
Based on same utility model design, the utility model embodiment also provides a kind of display device, comprise the above-mentioned touch-screen that the utility model embodiment provides, this display device can be: any product or parts with Presentation Function such as mobile phone, panel computer, televisor, display, notebook computer, digital album (digital photo frame), navigating instrument.The enforcement of this display device can, referring to the embodiment of above-mentioned touch-screen, repeat part and repeat no more.
A kind of touch-screen and display device that the utility model embodiment provides, using at least one signal line in array base palte as the touch-control sweep trace, array base palte has the touch-control read line staggered with the touch-control sweep trace, in touch-control sweep trace and touch-control read line limited area, includes photosensitive unit and touch switch unit; Wherein, photosensitive unit all is connected with the touch-control sweep trace with the touch switch unit, and photosensitive unit is connected with the touch-control read line by the touch switch unit; When the touch-control sweep trace loads sweep signal, by illumination, make photosensitive unit in opening, this photosensitive unit is to touch switch unit output control signal, control signal is controlled the touch switch unit to touch-control read line output touch sense signals, realized the optical touch control function, with respect to the embedded touch-screen of condenser type, can not produce the problem of signal interference and signal delay when large scale.
Obviously, those skilled in the art can carry out various changes and modification and not break away from spirit and scope of the present utility model the utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of the utility model claim and equivalent technologies thereof, the utility model also is intended to comprise these changes and modification interior.
Claims (10)
1. a touch-screen, comprise the array base palte with many signal lines, it is characterized in that;
At least one signal line in described array base palte is as the touch-control sweep trace;
Described array base palte has the touch-control read line staggered with described touch-control sweep trace;
Include photosensitive unit and touch switch unit in described touch-control sweep trace and described touch-control read line limited area; Wherein,
Described photosensitive unit all is connected with described touch-control sweep trace with described touch switch unit, and described photosensitive unit is connected with described touch-control read line by described touch switch unit; When described touch-control sweep trace loads sweep signal, by illumination, make described photosensitive unit in opening, described photosensitive unit is to described touch switch unit output control signal, and described control signal is controlled described touch switch unit to described touch-control read line output touch sense signals.
2. touch-screen as claimed in claim 1, is characterized in that, described photosensitive unit comprises a sensitization transistor; The transistorized source electrode of described sensitization is connected with described touch-control sweep trace, and the transistorized grid of described sensitization all is connected with described touch switch unit with drain electrode.
3. touch-screen as claimed in claim 2, is characterized in that, described sensitization transistor is infrared sensitization transistor.
4. touch-screen as claimed in claim 1, is characterized in that, described touch switch unit comprises a thin film transistor (TFT); The source electrode of described thin film transistor (TFT) is connected with described touch-control sweep trace, and the drain electrode of described thin film transistor (TFT) is connected with described touch-control read line, and the grid of described thin film transistor (TFT) is connected with described photosensitive unit.
5. touch-screen as claimed in claim 4, is characterized in that, described photosensitive unit comprises a sensitization transistor; The transistorized source electrode of described sensitization is connected with described touch-control sweep trace, and the transistorized grid of described sensitization all is connected with the grid of described thin film transistor (TFT) with drain electrode.
6. touch-screen as claimed in claim 1, is characterized in that, the data signal line in each described touch-control read line and described array base palte arranges and mutually insulated with layer.
7. touch-screen as claimed in claim 1, it is characterized in that, be provided with on described array base palte and be a plurality of pixel cells that matrix is arranged, there are two signal lines between the pixel cell of described array base palte adjacent lines, and the two adjacent row pixel cells of take are listed as one group of pixel cell, every group of pixel cell row share a data signal line between this two row pixel cell.
8. touch-screen as claimed in claim 7, is characterized in that, each described touch-control read line is the gap location between the pixel cell row of adjacent columns specifically.
9. as the described touch-screen of claim 1-8 any one, it is characterized in that, also comprise: with the subtend substrate that described array base palte is oppositely arranged, described subtend real estate has black matrix to a side of described array base palte;
The figure of described black matrix at least has open area at the region division corresponding with described photosensitive unit.
10. a display device, is characterized in that, comprises as the described touch-screen of claim 1-9 any one.
Priority Applications (1)
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| CN 201320456565 CN203366282U (en) | 2013-07-29 | 2013-07-29 | Touch screen and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320456565 CN203366282U (en) | 2013-07-29 | 2013-07-29 | Touch screen and display device |
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| CN203366282U true CN203366282U (en) | 2013-12-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412676A (en) * | 2013-07-29 | 2013-11-27 | 合肥京东方光电科技有限公司 | Touch screen and display device. |
| CN107390956A (en) * | 2017-07-31 | 2017-11-24 | 上海天马微电子有限公司 | A kind of touch-screen, display panel, display device |
| CN108650443A (en) * | 2018-05-29 | 2018-10-12 | Oppo广东移动通信有限公司 | Electronic device and its control method |
-
2013
- 2013-07-29 CN CN 201320456565 patent/CN203366282U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103412676A (en) * | 2013-07-29 | 2013-11-27 | 合肥京东方光电科技有限公司 | Touch screen and display device. |
| CN103412676B (en) * | 2013-07-29 | 2017-03-01 | 合肥京东方光电科技有限公司 | A kind of touch screen and display device |
| CN107390956A (en) * | 2017-07-31 | 2017-11-24 | 上海天马微电子有限公司 | A kind of touch-screen, display panel, display device |
| CN108650443A (en) * | 2018-05-29 | 2018-10-12 | Oppo广东移动通信有限公司 | Electronic device and its control method |
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Granted publication date: 20131225 Termination date: 20210729 |