CN210222725U

CN210222725U - Touch screen

Info

Publication number: CN210222725U
Application number: CN201921438384.XU
Authority: CN
Inventors: Hua Tian; 田华; Tiejun Sun; 孙铁军
Original assignee: Shenzhen Demingli Electronics Co Ltd
Current assignee: Zhuhai Hongpeihan Electronic Technology Co ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-03-31
Anticipated expiration: 2029-08-29

Abstract

The utility model provides a touch screen, which comprises a display area and a non-display area; the display area is divided into N touch areas, and each touch area comprises a plurality of touch electrodes for touch recognition; a master controller and N touch ICs are arranged in the non-display area; touch electrodes in the N touch areas are respectively connected to N touch ICs, and the N touch ICs are connected to a master controller; each touch IC is used for detecting whether touch occurs in each touch area, calculating a position coordinate when touch occurs and sending the position coordinate to the master controller, and the master controller is used for processing the position coordinate; the touch control identification of the large-size touch screen is realized by adopting a regional mode and adopting a mode of combining an independent small-size touch control IC and a master controller, so that the channel number can be ensured, the identification precision can be ensured, and the production cost can be reduced.

Description

Touch screen

Technical Field

The utility model relates to a touch-control discernment technical field especially relates to a touch-sensitive screen.

Background

At present, large-size touch screens are widely applied, in order to guarantee touch identification precision, the number of pins of a touch IC applied to the large-size touch screen is large, the size is large, corresponding cost is high, and if a common touch IC is adopted, the number of channels is small, and the identification precision cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to the problem that jumbo size touch-sensitive screen manufacturing cost is high among the above-mentioned prior art, provide a touch-sensitive screen, can be under the prerequisite of guaranteeing the discernment precision furthest reduction in production cost.

A touch screen comprises a display area and a non-display area;

the display area is divided into N touch areas, and each touch area comprises a plurality of touch electrodes for touch recognition;

a master controller and N touch ICs are arranged in the non-display area;

touch electrodes in the N touch areas are respectively connected to N touch ICs, and the N touch ICs are connected to a master controller;

each touch IC is used for detecting whether touch occurs in each touch area, calculating position coordinates when touch occurs and sending the position coordinates to the master controller, and the master controller is used for processing the position coordinates.

Further, the value range of N is 2-6.

Further, the touch IC is connected with the master controller through an IIC bus.

Furthermore, the master controller is provided with a USB interface module for connecting with an upper computer.

Further, the touch electrode comprises a driving electrode and an induction electrode, and the driving electrode and the induction electrode are respectively connected with the touch IC through signal lines.

The utility model provides a be applied to touch-control identification method and touch-sensitive screen of jumbo size touch-sensitive screen adopts the mode of subregion, adopts the mode of independent small-size touch-control IC and total controller combination respectively, realizes the touch-control discernment of jumbo size touch-sensitive screen, can guarantee the passageway quantity on the one hand, guarantees the discernment precision, and on the other hand can reduction in production cost.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of a touch screen provided by the present invention.

Fig. 2 is a schematic structural diagram of a second embodiment of the touch screen provided by the present invention.

Fig. 3 is a flowchart of an embodiment of a touch recognition method applied to a large-sized touch screen.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the following description of the present invention will refer to the accompanying drawings and illustrate embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example one

Referring to fig. 1, the present embodiment provides a touch screen including a display area and a non-display area;

the display area is divided into N touch areas, and each touch area comprises a plurality of touch electrodes 101 for touch recognition;

a master controller 102 and N touch ICs 103 are arranged in the non-display area;

the touch electrodes 101 in the N touch areas are respectively connected to N touch ICs 103, and the N touch ICs 103 are connected to a master controller 102;

each touch IC103 is configured to detect whether a touch occurs in each touch area, calculate a position coordinate when the touch occurs, and send the position coordinate to the overall controller 102, where the overall controller 102 is configured to process the position coordinate.

Referring to fig. 1, in the embodiment, it is illustrated that two touch areas are divided, each touch IC103 works independently, touch position coordinates in a corresponding touch area are collected, a larger display area is divided into N touch areas, and the number of channels in each touch area is relatively small, so that the number of pins corresponding to the touch IC103 is small, small-particle touch ICs can meet the use requirement, and each touch IC103 sends the position coordinates detected when touching to the master control 102 for processing.

The dividing number of the touch areas can be set according to the size of an actual touch screen, the sizes of the touch areas can be equal or unequal, and as a preferred embodiment, the value range of N is 2-4.

In a preferred embodiment, the touch IC103 is connected to the overall controller 102 via an IIC bus. Specifically, the N touch ICs 103 are connected to the main controller 102 in an IIC bus manner, the circuit is simple, the interface utilization rate is high, but the data transmission is relatively slow, the N touch ICs 103 can also be connected to the N IIC interfaces of the main controller 102 respectively, the circuit is relatively complex, but the data transmission speed is relatively fast.

In a preferred embodiment, the general controller 102 is provided with a USB interface module for connecting with an upper computer.

The large-size touch screen needs to be connected with an upper computer in many application scenes, touch information is reported to the upper computer, and the master controller 102 also plays a role in converting IIC to USB.

Further, the touch electrodes include driving electrodes and sensing electrodes, and the driving electrodes and the sensing electrodes are respectively connected to the touch IC103 through signal lines.

The working principle of the touch screen provided by the embodiment is as follows:

each touch IC103 detects whether a touch occurs in each touch area; if the touch occurs, the touch IC calculates the position coordinate of the touch and transmits the position coordinate to the master controller 102; the master controller 102 detects whether the abscissa of each position coordinate is equal, if not, it indicates that each touch point is irrelevant, and no touch point exists at the boundary of adjacent touch areas, and the master controller 102 takes each position coordinate as a final coordinate to perform the next operation, for example, reporting to an upper computer.

If the master controller 102 detects that the position coordinates have equal abscissas, it indicates that the touch points with equal abscissas are located at the junction of adjacent touch areas, respectively calculates the touch areas of the corresponding touch points with equal abscissas, and compares the sizes of the two touch areas; combining the two touch points into one touch point, and selecting the position coordinate of the touch point with the largest touch area as the final coordinate of the combined touch point; and if the touch areas of the touch points are equal in size, selecting the position coordinate of any one touch point as the final coordinate of the combined touch point. And finally, reporting the final coordinate to an upper computer by the master controller.

Taking two touch areas as an example, assuming that two touch ICs detect two touch points respectively, the position coordinates of the two touch points are (x1, y1), (x2, y2), if x1 and x2 are not equal, it indicates that the two touch points are not related and are not located at the boundary of the two touch areas. If x1 and x2 are equal, two touch points are actually a touch point pressed on the intersection of two touch areas, the touch areas of the two touch points are calculated to be S1 and S2 respectively, the sizes of S1 and S2 are compared, if S1 is larger than S2, (x1 and y1) are taken as the final coordinates of the combined touch point, otherwise, (x2 and y2) are taken as the final coordinates of the combined touch point, and if S1 and S2 are equal, (x1 and y1) or (x2 and y2) are taken as the final coordinates of the combined touch point.

The touch screen provided by the embodiment adopts a regional mode and adopts a mode of combining the independent small-size touch IC and the master controller respectively, so that touch identification of the large-size touch screen is realized, on one hand, the number of channels can be ensured, the identification precision is ensured, and on the other hand, the production cost can be reduced.

Example two

Referring to fig. 2, the present embodiment provides a touch screen, which is different from the first embodiment in that a display area of the touch screen provided in the present embodiment is divided into 4 areas, which respectively correspond to 4 touch ICs 200, and the 4 touch ICs are respectively located in non-display areas at two downward sides of the display area.

Assuming that four touch points are detected by the four touch ICs 200 respectively, the position coordinates of the four touch points are (x1, y1), (x2, y2), (x3, y3), (x4, y4), and if x1, x2, x3, and x4 are not equal, it is determined that the four touch points are not related. If x1, x2, x3 and x4 are equal, the four touch points are actually the boundary of the four touch areas pressed by one touch point, the touch areas of the four touch points are calculated and obtained to be S1, S2, S3 and S4 respectively, the sizes of S1, S2, S3 and S4 are compared, and the position coordinate of the touch point with the largest touch area is taken as the final coordinate of the combined touch point.

Referring to fig. 3, the present embodiment provides a touch recognition method applied to a large-size touch screen, including:

step S301, each touch IC detects whether touch occurs in each touch area;

step S302, if yes, the touch IC calculates the position coordinate of touch and sends the position coordinate to the master controller;

and step S303, the master controller processes the position coordinates.

Specifically, in step S302, the overall controller processes the position coordinates, including:

detecting whether the horizontal coordinates of the position coordinates are equal;

and if not, taking the coordinates of each position as final coordinates.

If two equal abscissa exists in the position coordinates, calculating the touch areas of the two corresponding touch points respectively, and comparing the sizes of the two touch areas;

and combining the two touch points into one touch point, and selecting the position coordinate of the touch point with the largest touch area as the final coordinate of the combined touch point.

And if the touch areas of the two touch points are equal in size, selecting the position coordinate of any one touch point as the final coordinate of the combined touch point.

Further, the method further comprises:

and the master controller reports the final coordinate to an upper computer.

For the specific working principle, please refer to the first embodiment, which is not described herein again.

The touch identification method applied to the large-size touch screen provided by the embodiment respectively adopts a mode of combining the independent small-size touch IC and the master controller to realize touch identification of the large-size touch screen, so that the number of channels can be ensured, the identification precision can be ensured, and the production cost can be reduced.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A touch screen is characterized by comprising a display area and a non-display area;

a master controller and N touch ICs are arranged in the non-display area;

2. The touch screen of claim 1, wherein N ranges from 2 to 6.

3. The touch screen of claim 1, wherein the touch IC is connected to the overall controller via an IIC bus.

4. The touch screen of claim 1, wherein the master controller is provided with a USB interface module for connecting with an upper computer.

5. The touch screen of claim 1, wherein the touch electrodes comprise driving electrodes and sensing electrodes, and the driving electrodes and the sensing electrodes are respectively connected to the touch IC through signal lines.