CN201828896U - Capacitance type touch screen - Google Patents
Capacitance type touch screen Download PDFInfo
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- CN201828896U CN201828896U CN2010205517011U CN201020551701U CN201828896U CN 201828896 U CN201828896 U CN 201828896U CN 2010205517011 U CN2010205517011 U CN 2010205517011U CN 201020551701 U CN201020551701 U CN 201020551701U CN 201828896 U CN201828896 U CN 201828896U
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- sensor
- film
- control chip
- touch screen
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- 239000011521 glass Substances 0.000 claims abstract description 11
- 230000001681 protective effect Effects 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 abstract description 7
- 239000011241 protective layer Substances 0.000 abstract 2
- 238000010586 diagram Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
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Abstract
The utility model discloses a capacitance type touch screen, which includes a protective layer, a display device, a sensor matrix and a control chip, wherein the sensor matrix includes two groups of sensors which are mutually perpendicular, one group of sensors are arranged on a film, and the other group of sensors are arranged on a film or glass; the protective layer is arranged above the sensor matrix, and the display device is arranged under the sensor matrix; and the control chip is electrically connected with every sensor in the sensor matrix, every sensor arranged on the film is provided with at least two different output terminals, all of the output terminals on every sensor are connected in parallel and then respectively connected with a signal input terminal of the control chip. The design of the capacitance type touch screen can reduce the resistance value of every sensor and enlarge the effective signal value of every sensor, so that the size of the touch screen can be made larger to meet the requirements of different customers.
Description
Technical field
The utility model belongs to the touch-control field, the capacitive touch screen structure of particularly a kind of large scale (greater than 3.5 inches).
Background technology
General common touch-screen is divided into two kinds of resistance-type and condenser types, and wherein capacitive touch screen is because of realizing that multi-point touch is widely used in electronic product.
As shown in Figure 4, traditional capacitive touch screen structure comprises protective seam 10, display device 20, sensor matrices 30 and control chip 40, and wherein, protective seam 10 is a transparent material, is positioned at the top of sensor matrices 30; Display device 20 is positioned at the below of sensor matrices 30, projects image towards the top; One end of the signal input part of control chip 40 and sensor matrices 30 electrically connects, and is used to judge the touch point position; Described sensor matrices 30 is made of two groups of orthogonal sensors, wherein one be mounted on the film, another is mounted on film or on glass, comprise M sensor being located at horizontal direction (being made as X-axis) and be located at N sensor of vertical direction (being made as Y-axis), cooperate shown in Figure 5, there is shown the sensor matrices of 8*12 diamond structure, wherein, each sensor that is positioned on the X-axis is all exported with the lower end, each sensor that is positioned on the Y-axis is all exported with left end, and connect corresponding port on soft board 301 (see figure 6)s respectively, with (can cooperate shown in Figure 7 simultaneously) after sensor matrices 30 and soft board 301 pressings, again soft board 301 is connected with control chip 40, with each sensor acquisition to simulating signal send into control chip 40.
During sensor, no matter use which kind of control chip in design, all the resistance that is positioned at unidirectional sensor has been proposed certain requirement, it sends into the signal value of control chip because the resistance of sensor when excessive, can decay, and it is inaccurate to cause exporting the result.And the factor that influences the resistance of sensor size mainly contains three:
(1) the own bill of materials plane of sensor resistance: when unit plane resistance was big more, then the resistance of sensor was big more, otherwise then more little.Add in the capacitive touch screen of structure of glass at film blooming or film at present, because the unit plane resistance of film upper sensor is higher, so this factor is difficult to overcome;
(2) size of single diamond shape in the sensor: the rhombus size is big more, and then the resistance of sensor is more little, otherwise then big more, but size can not be too big, to prevent to influence signal value and positional value; Therefore the resistance of thinking fully thoroughly to reduce by the size that changes rhombus sensor also is inconvenient;
(3) length dimension of sensor: the long more then resistance of length is big more, otherwise then more little, and it is too big that this causes sensor matrices not design.
By above analysis, as can be known based on prior art and structure, the size of capacitive touch screen can not be done too greatly, particularly for the structure that film blooming or film add glass, owing to be subjected to the influence of the face resistance of film own, size can not be done greatly especially, generally can not be greater than 3.5 inches, thus limited the application of touch-screen.
Based on aforementioned, the design people studies improvement in order to enlarge the application of touch-screen to the structure of existing touch-screen, and to enlarge the size of touch-screen, this case produces thus.
The utility model content
Fundamental purpose of the present utility model is to provide a kind of capacitive touch screen, and it can reduce resistance of sensor, thereby makes the size of touch-screen do more, and satisfies different clients' demand.
In order to reach above-mentioned purpose, solution of the present utility model is:
A kind of capacitive touch screen comprises protective seam, display device, sensor matrices and control chip, and wherein, sensor matrices comprises two groups of orthogonal sensors, and wherein one group of sensor is located on the film, and another group sensor is located at film or on glass; Protective seam is positioned at the top of sensor matrices, and display device is positioned at the below of sensor matrices; Control chip electrically is connected with each sensor in the sensor matrices, and each sensor of being located on the film is equipped with at least two different output terminals, and all the output terminal parallel connections on each sensor, connects the signal input part of control chip more respectively.
The above-mentioned sensor of being located on the film all is connected in parallel to the signal input part of control chip with two ends.
After adopting such scheme, the utility model is by at least two output terminals of diverse location setting at the film upper sensor, the signal input part of control chip will be connected after these output terminal parallel connections again, can regard the parallel circuit of a resistance like this as, self resistance that can reduce sensor is calculated in parallel connection by resistance, like this can be sensor design longer, thereby enlarged the overall dimensions of capacitive touch screen.
Description of drawings
Fig. 1 is the front elevation of sensor matrices in the utility model;
Fig. 2 is the soft board circuit diagram after the lead parallel connection of film upper sensor two ends in the utility model;
Fig. 3 is the synoptic diagram after sensor matrices and the soft board pressing in the utility model;
Fig. 4 is the one-piece construction exploded view of existing capacitive touch screen;
Fig. 5 is the front elevation of existing film upper sensor;
Fig. 6 is the soft board circuit diagram of the existing single-ended output of film upper sensor;
Fig. 7 is the synoptic diagram after existing film upper sensor matrix and the soft board pressing.
Embodiment
Below with reference to drawings and the specific embodiments, structure of the present utility model and beneficial effect are elaborated.
The utility model provides a kind of capacitive touch screen, comprise protective seam, display device, sensor matrices and control chip, wherein, sensor matrices 1 comprises two groups of orthogonal sensors 11, wherein one group of sensor 11 is located on the film, sees 12 sensors that are positioned among Fig. 1 on the Y-axis, and another group sensor 11 is located at film or on glass, be example to be located on glass in the present embodiment, see 8 sensors that are positioned among Fig. 1 on the X-axis; Protective seam is a transparent material, is positioned at the top of sensor matrices 1, and sensor matrices 1 and external environment are isolated, and increases the service life, and improves measuring accuracy; Display device is located at the below of sensor matrices 1, is used for controlling content towards the top projection; And each sensor 11 in control chip and the sensor matrices 1 electrically connects, and is used to receive the image data of each sensor 11, and carries out analyzing and processing, where judges by touch-control; The aforementioned known configurations that is does not repeat them here.
Improvement of the present utility model is: for each sensor 11 of being located on the film, at least two different output terminals are set all, after all the output terminal parallel connections on each sensor 11, are connected respectively to the signal input part of control chip again; Output terminal is many more herein, and the resistance of sensor 11 is more little, yet considers cost of products and performance requirement, generally two or three output terminals can be set.
In the present embodiment, cooperating shown in Figure 1ly, is to draw lead 2 respectively at the two ends of being located at each film upper sensor 11 on the Y-axis.In order to realize the two ends parallel connection of each sensor 11 on the film, set number of sensors on the respective sensor matrix 1 in the present embodiment, design a kind of softpanel structure, with reference to shown in Figure 2, and wherein need several leads in parallel are gone ahead of the rest and are connect, with sensor matrices 1 and soft board 3 pressings, can directly connect the signal input part of control chip then.
By two ends parallel connection with film upper sensor 11, can effectively reduce its resistance, be that 10 kilo-ohms sensor is an example with whole resistance, during according to the single-ended output of existing structure, its resistance still is 10 kilo-ohms; If change two ends output into according to the utility model, then the resistance of each branch road only is half of former resistance, it can equivalence be two 5 kilo-ohms resistance parallel connection, and actual resistance is 5*5/ (5+5)=2.5 kilo-ohm, it only is 1/4th of former resistance, thereby strengthened the parasitic capacitance value and the useful signal value of film upper sensor, realized that the large scale of capacitive touch screen is made.
Need to prove, for being located at sensor on glass, certainly also can be according to this principle, be designed to multiterminal output, but because the unit plane resistance of sensor on glass itself is smaller, its whole resistance is little, therefore considers and reduces material cost and simplified wiring, to being located at the structure that sensor on glass can still use single-ended output.
Above embodiment only is explanation technological thought of the present utility model; can not limit protection domain of the present utility model with this; every according to the technological thought that the utility model proposes, any change of being done on the technical scheme basis all falls within the utility model protection domain.
Claims (2)
1. capacitive touch screen, comprise protective seam, display device, sensor matrices (1) and control chip, wherein, sensor matrices (1) comprises two groups of orthogonal sensors (11), wherein one group of sensor (11) is located on the film, and another group sensor (11) is located at film or on glass; Protective seam is positioned at the top of sensor matrices (1), and display device is positioned at the below of sensor matrices (1); It is characterized in that: each sensor (11) in control chip and the sensor matrices (1) electrically connects, and each sensor (11) of being located on the film is equipped with at least two different output terminals, and all the output terminal parallel connections on each sensor (11) connect the signal input part of control chip more respectively.
2. a kind of capacitive touch screen as claimed in claim 1 is characterized in that: described each sensor (11) of being located on the film all is connected in parallel to the signal input part of control chip with two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205517011U CN201828896U (en) | 2010-09-27 | 2010-09-27 | Capacitance type touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205517011U CN201828896U (en) | 2010-09-27 | 2010-09-27 | Capacitance type touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201828896U true CN201828896U (en) | 2011-05-11 |
Family
ID=43967419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205517011U Expired - Fee Related CN201828896U (en) | 2010-09-27 | 2010-09-27 | Capacitance type touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201828896U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102591547A (en) * | 2012-02-07 | 2012-07-18 | 深圳市金立通信设备有限公司 | Resistive touch screen capable of preventing handwriting trajectory deviation |
| WO2013037238A1 (en) * | 2011-09-13 | 2013-03-21 | Tsai Hsiung-Kuang | Visual interface system |
-
2010
- 2010-09-27 CN CN2010205517011U patent/CN201828896U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013037238A1 (en) * | 2011-09-13 | 2013-03-21 | Tsai Hsiung-Kuang | Visual interface system |
| US9335849B2 (en) | 2011-09-13 | 2016-05-10 | Hsiung-Kuang Tsai | Visual interface system |
| CN102591547A (en) * | 2012-02-07 | 2012-07-18 | 深圳市金立通信设备有限公司 | Resistive touch screen capable of preventing handwriting trajectory deviation |
| CN102591547B (en) * | 2012-02-07 | 2015-04-08 | 深圳市金立通信设备有限公司 | Resistive touch screen capable of preventing handwriting trajectory deviation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160106 Address after: 210000 Jiangsu city in Nanjing Province Economic Development Zone Jiangning Road No. 9 building A2 week Patentee after: NANJING DOTS INTELLIGENT TECHNOLOGY CO., LTD. Address before: 211102 No. 189 Yan Hu Road, Jiangning Development Zone, Jiangsu, Nanjing, China Patentee before: Nanjing Dianmian Photoelectricity Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20190927 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |