CN203038256U - Capacitor type embedded touch screen and display device - Google Patents
Capacitor type embedded touch screen and display device Download PDFInfo
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- CN203038256U CN203038256U CN 201320037913 CN201320037913U CN203038256U CN 203038256 U CN203038256 U CN 203038256U CN 201320037913 CN201320037913 CN 201320037913 CN 201320037913 U CN201320037913 U CN 201320037913U CN 203038256 U CN203038256 U CN 203038256U
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- 239000000758 substrate Substances 0.000 claims abstract description 49
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- 230000005684 electric field Effects 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000010409 thin film Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- -1 Indium Tin metal oxide Chemical class 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical class [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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Abstract
The utility model discloses a capacitor type embedded touch screen and a display device. A grid electrode signal wire in a thin film transistor (TFT) array substrate is used as a touch control drive wire, a touch control induction wire is arranged between adjacent pixel units in the TFT array substrate, and touch control units are arranged at the overlapping position of a touch control scanning wire and the touch control induction wire. Each touch control unit is composed of a touch control induction electrode and a touch control drive electrode so as to achieve the function of the touch screen, wherein the touch control induction electrode is electrically connected with the touch control induction wire, and the touch control drive electrode is electrically connected with the touch control scanning wire through a touch control switch unit. Due to the fact that the grid electrode signal wire is used as the touch control scanning wire, and a grid electrode scanning signal which is input to the touch control drive electrodes in the touch control units is used a driving signal for touch control so as to achieve the function of touch control, addition of an integrated circuit (IC) which is used for touch control drive can be avoided, and the manufacturing cost is saved.
Description
Technical Field
The utility model relates to a show technical field, especially relate to an embedded touch-sensitive screen of capacitanc and display device.
Background
With the rapid development of display technology, Touch Screen panels (Touch screens) have gradually spread throughout the lives of people. At present, a touch screen can be divided into: an Add On Mode Touch Panel (Add On Touch Panel), an overlay surface Touch Panel (On Cell Touch Panel), and an In Cell Touch Panel (In Cell Touch Panel). The externally-hung touch screen is produced by separately producing a touch screen and a Liquid Crystal Display (LCD), and then the externally-hung touch screen is attached together to form the LCD with a touch function. And embedded touch-control electrode with the touch-sensitive screen of embedded touch-sensitive screen is embedded inside liquid crystal display, can attenuate the holistic thickness of module, and the cost of manufacture that again can greatly reduced touch-sensitive screen receives each big panel producer and favours.
At present, an existing capacitive embedded (In cell) touch screen is implemented by directly additionally adding a touch scanning line and a touch sensing line on an existing TFT (Thin Film Transistor) array substrate, that is, two layers of strip ITO electrodes intersecting each other at different surfaces are manufactured on the surface of the TFT array substrate, the two layers of ITO (Indium Tin Oxides, Indium Tin metal oxide) electrodes are respectively used as a touch driving line and a touch sensing line of the touch screen, and a sensing capacitor is formed at the intersection of the different surfaces of the two ITO electrodes. The working process is as follows: when a touch driving signal is loaded on an ITO electrode serving as a touch driving line, a voltage signal coupled out by the touch sensing line through the sensing capacitor is detected, in the process, when a human body contacts the touch screen, a human body electric field acts on the sensing capacitor, so that the capacitance value of the sensing capacitor is changed, the voltage signal coupled out by the touch sensing line is further changed, and the position of a contact point can be determined according to the change of the voltage signal.
The structural design of the capacitive embedded touch screen needs to simultaneously utilize two driving chips (ICs) to respectively realize touch driving and display driving, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an embedded touch-sensitive screen of capacitanc and display device for realize the lower embedded touch-sensitive screen of capacitanc of cost.
The embodiment of the utility model provides a capacitive embedded touch screen, including the TFT array substrate that has the grid signal line, and be equipped with a plurality of pixel units that are the matrix arrangement in the TFT array substrate;
the TFT array substrate is provided with touch control induction lines positioned between the pixel units in adjacent rows;
at least one grid signal line in the TFT array substrate is used as a touch scanning line;
the TFT array substrate is provided with a touch unit positioned at the overlapping part of the touch scanning line and the touch induction line; wherein,
each touch control unit consists of a touch control induction electrode electrically connected with the adjacent touch control induction line and a touch control drive electrode electrically connected with the adjacent touch control scanning line through a touch control switch unit; the touch switch unit is used for conducting the touch driving electrode and the touch scanning line which are connected with the touch switch unit when the grid scanning signal is loaded by the touch scanning line which is electrically connected with the touch switch unit.
The embodiment of the utility model provides a pair of display device, include the embodiment of the utility model provides an embedded touch-sensitive screen of capacitanc.
The utility model discloses beneficial effect includes:
the embodiment of the utility model provides a pair of embedded touch-sensitive screen of capacitanc and display device, regard the grid signal line in the TFT array substrate as the touch-control drive line, set up the touch-control induction line between the pixel unit of adjacent row in the TFT array substrate, and set up the touch-control unit in the overlap department of touch-control scanning line and touch-control induction line, wherein, every touch-control unit is by the touch-control induction electrode that links to each other with touch-control induction line electric property, and constitute through the touch-control drive electrode that touch-control switch unit and touch-control scanning line electric property link to each other, realize the function of touch-sensitive screen. The grid signal line is used as the touch scanning line to input the grid scanning signal to the touch driving electrode in the touch unit as the touch driving scanning signal, so that the touch function is realized, the increase of an IC (integrated circuit) for touch driving can be avoided, and the manufacturing cost is saved.
Drawings
Fig. 1 is a schematic structural diagram of a TFT array substrate in an embedded touch screen according to an embodiment of the present invention;
fig. 2 is a partially enlarged view of a portion a of the TFT array substrate provided in fig. 1;
fig. 3 is a schematic structural diagram of a capacitive embedded touch screen according to an embodiment of the present invention;
fig. 4 is an exploded schematic view of a capacitive embedded touch screen according to an embodiment of the present invention;
fig. 5a and 5b are schematic diagrams of a touch unit provided by an embodiment of the present invention before and during touch respectively;
fig. 6 is a schematic structural diagram of a touch unit according to an embodiment of the present invention.
Detailed Description
The following describes in detail a specific implementation of a capacitive embedded touch panel and a display device according to an embodiment of the present invention with reference to the accompanying drawings.
The thickness and shape of each layer of film in the drawings do not reflect the real proportion of the TFT array substrate or the color film substrate, and the purpose is only to illustrate the present invention.
The embodiment of the utility model provides a capacitive embedded touch screen, as shown in fig. 1, including the TFT array substrate that has grid signal line 01, and be equipped with a plurality of pixel units 02 that are arranged in matrix in the TFT array substrate;
the TFT array substrate is provided with touch sensing lines 03 positioned between the pixel units in adjacent rows;
at least one grid signal line 01 in the TFT array substrate is used as a touch scanning line 04;
the TFT array substrate is provided with a touch unit positioned at the overlapping part of the touch scanning line 04 and the touch induction line 03; in which, as shown in figure 2,
each touch unit consists of a touch sensing electrode 05 electrically connected with an adjacent touch sensing line 03 and a touch driving electrode 07 electrically connected with an adjacent touch scanning line 04 through a touch switch unit 06; the touch switch unit 06 is configured to turn on the touch driving electrode 07 and the touch scanning line 04 connected to the touch switch unit 06 when the gate scanning signal is applied to the touch scanning line 04 electrically connected to the touch switch unit 06.
The utility model provides an above-mentioned embedded touch-sensitive screen of capacitanc regards the grid signal line in the TFT array substrate as the touch-control drive line, set up the touch-control induction line between the pixel unit of adjacent row in the TFT array substrate, and set up the touch-control unit in the overlap department of touch-control scanning line and touch-control induction line, wherein, every touch-control unit is by the touch-control induction electrode that links to each other with touch-control induction line electric property, and constitute with the touch-control drive electrode that touch-control scanning line electric property links to each other through the touch-control switch unit, in order to realize the function of touch-sensitive. The grid signal line is used as the touch scanning line to input the grid scanning signal to the touch driving electrode in the touch unit as the touch driving signal, so that the touch function is realized, the increase of an IC (integrated circuit) for touch driving can be avoided, and the manufacturing cost is saved.
Further, in the above capacitive embedded touch screen provided in the embodiment of the present invention, as shown in fig. 3, the capacitive embedded touch screen may further include: the color film substrate is arranged above the TFT array substrate and has the same size as the TFT array substrate;
one surface of the color film substrate, which is opposite to the TFT array substrate, is provided with a shielding layer for shielding an electric field;
the shielding layer is at least an opening region in a region corresponding to the touch unit, that is, there is no pattern in a region corresponding to the touch unit of the shielding layer, and the region without the pattern is shown by a dashed box in fig. 3.
In specific implementation, the shielding layer may be made of ITO, and the shielding layer may shield interference of an external electric field, as shown in the exploded schematic diagram of fig. 4, there is no pattern (i.e., a skylight) in an area of the shielding layer corresponding to the touch unit, and a human electric field may act on the touch unit through the skylight.
Specifically, as shown in fig. 5a, before touch control, a coupling capacitor Co is provided between a touch sensing electrode and a touch driving electrode which constitute a touch control unit; as shown in fig. 5b, during touch control, since the human body electric field acts on the touch sensing electrode and the touch driving electrode in the touch unit, respectively, the capacitance between the touch sensing electrode and the touch driving electrode changes Co → Co +. DELTA.C, and at this time, whether there is a contact can be determined by the voltage change of the touch sensing electrode.
Specifically, the lateral coordinate, that is, the x-direction coordinate of the touch point can be obtained by testing the voltage change of the touch sensing line connected to the touch sensing electrode row by row, and the y-direction coordinate of the longitudinal coordinate of the touch point can be obtained by monitoring the gate scanning signal loaded on the gate signal line serving as the touch scanning line, so as to obtain the touched position.
Preferably, in an implementation, the touch switch unit for connecting the touch driving electrode in the touch unit and the corresponding touch scanning line may be a TFT device, wherein a gate and a drain of the TFT device are electrically connected to the touch scanning line at the same time, that is, the gate and the drain are shorted, and a source is electrically connected to the touch driving electrode. Each component of the TFT device serving as the touch switch unit can be prepared in the same layer with each component of the existing pixel TFT device in the TFT array substrate, so that a new preparation process is not needed, the purpose can be achieved only by changing the composition of each corresponding film layer, and the manufacturing cost of the TFT array substrate serving as the touch screen is not increased.
The TFT device with the short-circuited grid electrode and the short-circuited drain electrode is used as the touch switch unit, so that the grid scanning signal can be used as a touch driving signal to flow into the corresponding touch driving electrode only when the grid scanning signal loaded by the touch scanning line is at a high potential, and the grid scanning signal can not be used as the touch driving signal to flow into the corresponding touch driving electrode when the grid scanning signal loaded by the touch scanning line is at a low potential, so that only one row of touch driving electrodes are started at the same time, and the uniqueness of the longitudinal coordinate of the touch position is ensured.
Generally, the touch accuracy of touch-sensitive screen is usually in the millimeter level, and the display accuracy of TFT array substrate is usually in the micron level, and it can be seen that, the required drive line (data signal line and grid signal line) is less than the TFT array substrate display required drive line (data signal line and grid signal line) much for the touch-sensitive screen, consequently, in the embedded touch-sensitive screen of capacitanc that the embodiment of the utility model provides, when setting for touch-sensitive scan line and touch-sensitive line, generally set up the interval between each touch-sensitive scan line to the same, the interval between each touch-sensitive line sets up to the same. For example, as shown in fig. 1, two pixel units are spaced between each touch scan line, and two pixel units are spaced between each touch drive line.
Optimally, the distance between the touch scanning lines and the distance between the touch sensing lines can be set to be the same, so as to unify the touch accuracy of the touch screen.
Furthermore, when the touch sensing lines between the pixel units in the adjacent rows are realized in the TFT array substrate, the touch sensing lines and the data signal lines in the TFT array substrate can be arranged on the same layer and are insulated from each other, namely, the touch sensing lines insulated from the data signal lines are prepared while the data signal lines are prepared, so that an additional preparation process is not needed to be added when the TFT array substrate is prepared, and the graphs of the data signal lines and the touch sensing lines can be formed only through a composition process, so that the preparation cost can be saved, and the added value of products is improved. Of course, the touch sensing lines and the data signal lines may be prepared separately, and are not limited herein.
Specifically, the embodiment of the utility model provides an above-mentioned touch-sensitive screen, when the overlap department of touch-control scanning line and touch-control induction line sets up the touch-control unit, can adopt metal or transparent conductive oxide as touch-control induction electrode or touch-control drive electrode's material.
Preferably, in the specific implementation, the touch sensing electrode and the touch driving electrode of each touch unit may be disposed on the same layer or different layers, as long as the touch sensing electrode and the touch driving electrode can form a capacitor structure. The following description is given by taking the same layer of the touch sensing electrode and the touch driving electrode of each touch unit as an example.
When the touch sensing electrode and the touch driving electrode are prepared by adopting transparent conductive oxide, the touch unit and the pixel electrode in the TFT array substrate can be prepared in the same layer and need to be ensured to be mutually insulated; when the touch sensing electrode and the touch driving electrode are made of metal, the touch unit and the source/drain electrode of the TFT device in the TFT array substrate may be made in the same layer and are guaranteed to be insulated from each other, which is not described herein.
Because each touch unit is only arranged at the overlapping position of the touch scanning line and the touch sensing line, the touch area of each touch unit is smaller to ensure the aperture opening ratio of the touch screen, which is not beneficial to improving the touch sensitivity. Therefore, preferably, in the touch screen provided in the embodiment of the present invention, as shown in fig. 6, it may further include: at least one first touch sub-electrode 08 electrically connected with the touch sensing electrode 05, and at least one second touch sub-electrode 09 electrically connected with the touch sensing electrode 05; the first touch sub-electrode and the 08 second touch sub-electrode 09 are respectively located at the gap between the adjacent pixel units. Therefore, on the basis of ensuring the aperture opening ratio of the touch screen, the touch area of each touch unit can be increased as much as possible, so that the sensitivity of touch sensing is improved.
Further, when the first touch sub-electrode 08 and the second touch sub-electrode 09 are provided, for each touch unit: as shown in fig. 6, each first touch sub-electrode 08 electrically connected to the touch sensing electrode 05 and each second touch sub-electrode 09 electrically connected to the touch driving electrode 07 preferably correspond to each other one by one, and each pair of the corresponding first sub-electrode 08 and second sub-electrode 09 forms a capacitor structure. Of course, the number of the first touch sub-electrodes 08 and the second touch sub-electrodes 09 in each touch unit may be different, and is not limited herein.
Based on same utility model the design, the embodiment of the utility model provides a still provides a display device, include the embodiment of the above-mentioned embedded touch-sensitive screen of capacitanc that the embodiment of embedded touch-sensitive screen of capacitanc can be referred to in this display device's implementation, and repeated part is no longer repeated.
The embodiment of the utility model provides a pair of embedded touch-sensitive screen of capacitanc and display device, regard the grid signal line in the TFT array substrate as the touch-control drive line, set up the touch-control induction line between the pixel unit of adjacent row in the TFT array substrate, and set up the touch-control unit in the overlap department of touch-control scanning line and touch-control induction line, wherein, every touch-control unit is by the touch-control induction electrode that links to each other with touch-control induction line electric property, and constitute through the touch-control drive electrode that touch-control switch unit and touch-control scanning line electric property link to each other, realize the function of touch-sensitive screen. The grid signal line is used as the touch scanning line to input the grid scanning signal to the touch driving electrode in the touch unit as the touch driving scanning signal, so that the touch function is realized, the increase of an IC (integrated circuit) for touch driving can be avoided, and the manufacturing cost is saved.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A capacitive embedded touch screen comprises a TFT array substrate with a grid signal line, wherein a plurality of pixel units which are arranged in a matrix manner are arranged in the TFT array substrate; it is characterized in that the preparation method is characterized in that,
the TFT array substrate is provided with touch control induction lines positioned between the pixel units in adjacent rows;
at least one grid signal line in the TFT array substrate is used as a touch scanning line;
the TFT array substrate is provided with a touch unit positioned at the overlapping part of the touch scanning line and the touch induction line; wherein,
each touch control unit consists of a touch control induction electrode electrically connected with the adjacent touch control induction line and a touch control drive electrode electrically connected with the adjacent touch control scanning line through a touch control switch unit; the touch switch unit is used for conducting the touch driving electrode and the touch scanning line which are connected with the touch switch unit when the grid scanning signal is loaded by the touch scanning line which is electrically connected with the touch switch unit.
2. The touch screen of claim 1, wherein the touch switch unit is a TFT device, wherein a gate and a drain of the TFT device are electrically connected to the touch scan line at the same time, and a source is electrically connected to the touch driving electrode.
3. The touch screen of claim 1, wherein the touch scan lines are spaced at the same distance from each other, and the touch sense lines are spaced at the same distance from each other.
4. The touch screen of claim 1, wherein each of the touch sense lines is disposed in the same layer as a data signal line in the TFT array substrate and is insulated from the data signal line.
5. The touch screen of claim 1, wherein the touch sensing electrode or the touch driving electrode is made of a metal or a transparent conductive oxide.
6. The touch screen of claim 5, wherein the touch sensing electrodes and the touch driving electrodes of each touch unit are disposed in the same layer.
7. The touch screen of any of claims 1-6, further comprising: the touch sensing device comprises at least one first touch sub-electrode and at least one second touch sub-electrode, wherein the first touch sub-electrode is electrically connected with the touch sensing electrode;
the first touch sub-electrode and the second touch sub-electrode are respectively positioned at a gap between adjacent pixel units.
8. The touch screen of claim 7, wherein for each touch unit: each first touch sub-electrode electrically connected with the touch sensing electrode corresponds to each second touch sub-electrode electrically connected with the touch driving electrode one by one, and each pair of the first sub-electrode and the second sub-electrode which correspond to each other form a capacitor structure.
9. The touch screen of any of claims 1-6, further comprising: the color film substrate is arranged above the TFT array substrate and has the same size as the TFT array substrate;
one surface of the color film substrate, which is opposite to the TFT array substrate, is provided with a shielding layer for shielding an electric field;
the shielding layer is at least an opening region in a region corresponding to the touch unit.
10. A display device comprising the capacitive in-cell touch screen of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320037913 CN203038256U (en) | 2013-01-24 | 2013-01-24 | Capacitor type embedded touch screen and display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320037913 CN203038256U (en) | 2013-01-24 | 2013-01-24 | Capacitor type embedded touch screen and display device |
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| CN203038256U true CN203038256U (en) | 2013-07-03 |
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| CN 201320037913 Expired - Lifetime CN203038256U (en) | 2013-01-24 | 2013-01-24 | Capacitor type embedded touch screen and display device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105989A (en) * | 2013-01-24 | 2013-05-15 | 北京京东方光电科技有限公司 | Capacitance type embedded touch screen and display device |
| CN103699282A (en) * | 2013-12-24 | 2014-04-02 | 华映视讯（吴江）有限公司 | Touch display device |
-
2013
- 2013-01-24 CN CN 201320037913 patent/CN203038256U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103105989A (en) * | 2013-01-24 | 2013-05-15 | 北京京东方光电科技有限公司 | Capacitance type embedded touch screen and display device |
| CN103105989B (en) * | 2013-01-24 | 2015-09-02 | 北京京东方光电科技有限公司 | A kind of capacitance type in-cell touch panel and display device |
| CN103699282A (en) * | 2013-12-24 | 2014-04-02 | 华映视讯（吴江）有限公司 | Touch display device |
| CN103699282B (en) * | 2013-12-24 | 2016-12-07 | 华映视讯（吴江）有限公司 | Touch control display apparatus |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY Effective date: 20150707 Owner name: JINGDONGFANG SCIENCE AND TECHNOLOGY GROUP CO., LTD Free format text: FORMER OWNER: BEIJING BOE PHOTOELECTRICITY SCIENCE + TECHNOLOGY CO., LTD. Effective date: 20150707 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150707 Address after: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Patentee after: BOE Technology Group Co., Ltd. Patentee after: Beijing BOE Photoelectricity Science & Technology Co., Ltd. Address before: 100176 Beijing city in Western Daxing District economic and Technological Development Zone, Road No. 8 Patentee before: Beijing BOE Photoelectricity Science & Technology Co., Ltd. |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20160923 Address after: 100176 Beijing economic and Technological Development Zone, West Central Road, No. 8 Patentee after: Beijing BOE Photoelectricity Science & Technology Co., Ltd. Address before: 100015 Jiuxianqiao Road, Beijing, No. 10, No. Patentee before: BOE Technology Group Co., Ltd. Patentee before: Beijing BOE Photoelectricity Science & Technology Co., Ltd. |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20130703 Effective date of abandoning: 20150902 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |