CN106775139A - Touch-screen and the display device with the touch-screen - Google Patents

Abstract

Include electrode layer the invention provides the touch-screen, the electrode layer includes electrode, and the electrode is arranged in array；Touch chip, each described electrode is connected to the touch chip by gage system, and when touch-screen is by touch-control, corresponding electrode sends to touch chip touching signals by corresponding lead, it is independently controlled, touch chip determines the corresponding coordinate of touch point according to touching signals.The present invention also provides a kind of display device with the touch-screen.Touch-screen of the invention and the display device with the touch-screen by electrode with lead by way of be connected to touch chip and determine the coordinate of touch point, so as to realize multi-point touch.

Description

Touch screen and display device with the touch screen

technical field

The invention relates to the field of electronics, in particular to a touch screen and a display device with the touch screen.

Background technique

At present, the existing touch screens are mainly projected capacitive, which are divided into mutual capacitance (Multi-Capacitance) and self-capacitance (Self-Capacitance) according to the scanning method. Among them, self-capacitive touch screens are generally made of transparent conductive materials (such as ITO) into horizontal and vertical electrode arrays. These horizontal and vertical electrodes form capacitance with the ground respectively. When a finger touches the touch screen, the capacitance of the finger will be superimposed. To the capacitance of the screen body, the capacitance of the screen body increases.

During touch detection, the self-capacitive touch screen detects the horizontal and vertical electrode arrays in sequence, and determines the horizontal and vertical coordinates respectively according to the capacitance changes before and after the touch, and then combines them into plane touch coordinates. The scanning method of the self-capacitive touch screen is equivalent to projecting the touch points on the touch screen to the X-axis and Y-axis directions respectively, and then calculating the coordinates in the X-axis and Y-axis directions respectively, and finally combining them into the coordinates of the touch points. Therefore, if there are two touch points on the touch screen and the two points are not in the same X-axis direction or the same Y-axis direction, there are two projections in the X-axis and Y-axis directions respectively, and four coordinates are combined. Obviously, only two One coordinate is real, and the other two coordinates are commonly known as "ghost points", which cannot achieve real multi-touch effects.

In addition, the existing self-capacitive touch screen is greatly affected by temperature, humidity, finger wetness, and external large-area objects, etc., and is prone to "drift".

Contents of the invention

Provided are a touch screen and a display device with the touch screen, which can realize multi-point touch.

The present invention provides a touch screen, the touch screen includes an electrode layer, the electrode layer includes electrodes, and the electrodes are arranged in an array; a touch chip, each of the electrodes is connected to the touch chip through a wire, when When the touch screen is touched, the corresponding electrode sends the touch signal to the touch chip through the corresponding lead wire, which performs independent control, and the touch chip determines the coordinates corresponding to the touch point according to the touch signal.

Wherein, the electrode pattern can be rectangle, rhombus and polygon.

Wherein, the arrangement of the leads can be sequential arrangement, cross arrangement and mixed arrangement.

Wherein, the touch screen further includes a first shielding layer, the electrode layer includes a first surface facing the substrate, and the first shielding layer is disposed on the first surface.

Wherein, the touch screen further includes a second shielding layer, the electrode layer further includes a second surface opposite to the first surface, and the second shielding layer is disposed on the second surface.

Among them, when the touch screen is touched, the distance between the finger and the electrode is inversely proportional to the capacitance between the finger and the electrode, and the distance between the finger and the electrode can be determined by measuring the capacitance between the finger and the electrode, and then determined The specific coordinates of the touch point.

Another aspect of the present invention also provides a display device, which includes a display screen, a touch screen and a cover sequentially arranged on it, the touch screen includes an electrode layer, the electrode layer includes electrodes, and the electrodes are arranged in an array; control chip, each of the electrodes is connected to the touch chip through a wire, and when the touch screen is touched, the corresponding electrode sends the touch signal to the touch chip through the corresponding wire to independently control it, The touch chip determines the coordinates corresponding to the touch point according to the touch signal.

The touch screen and the display device having the touch screen provided according to the above-mentioned implementation manner determine the coordinates of the touch points by connecting the electrodes to the touch chip in the form of wires, so as to realize multi-point touch. At the same time, the distance between the finger and the electrode can be obtained by measuring the capacitance between the finger and the electrode, and then the specific coordinates of the touch point can be determined to achieve a floating touch effect. In addition, the first shielding layer and the second shielding layer disposed on both sides of the electrode layer can effectively avoid external interference.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is an exploded perspective view of a display device with a touch screen provided in a preferred embodiment of the present invention;

2 is a schematic diagram of electrodes and leads of a touch screen provided by a preferred embodiment of the present invention;

3 is a schematic plan view of the pattern of the electrodes of the touch screen provided by the preferred embodiment of the present invention;

Fig. 4 is a schematic diagram of the first shielding layer of the touch screen provided by the preferred embodiment of the present invention;

5 is a schematic plan view of the second shielding layer of the touch screen provided by the preferred embodiment of the present invention;

Fig. 6 is a partial circuit diagram of the touch screen provided by the preferred embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to FIG. 1 , a preferred embodiment of the present invention provides a display device 100 with a touch screen. The display device 100 includes an existing display screen (not shown in the figure), a touch screen 10 and a cover 30 sequentially disposed thereon.

The touch screen 10 includes an electrode layer 11 , a first shielding layer 13 , a second shielding layer 15 and a touch chip 17 (refer to FIG. 6 ). The electrode layer 11 includes a first surface 111 and a second surface 113 opposite to the first surface 111 . The electrode layer 11 is provided with electrodes 115, and the electrodes 115 are arranged in an M×N array, wherein M and N are both natural numbers. Please refer to FIG. 2. In this preferred embodiment, there are 16 electrodes 115 in total. Arranged in a 4×4 array, please refer to FIG. 3 , the patterns of the electrodes 115 include but not limited to rectangles, rhombuses and polygons. The arrangement of the leads 117 is random, and can be arranged sequentially, crosswise or mixed.

Each of the electrodes 115 is connected to the touch chip 17 through a wire 117. When the touch screen 10 is touched, the corresponding electrode 115 sends a touch signal to the touch chip 17 through the corresponding wire 117. It is controlled independently, and the touch chip 17 can determine the coordinates corresponding to the touch point according to the touch signal, so as to realize multi-touch. The touch signal can be a capacitance Cx between a finger performing a touch operation on the touch screen 10 and the electrode 115 .

Please also refer to FIG. 4 , the first shielding layer 13 is disposed on the first surface 111 for shielding the electronic components disposed under the first surface 111 of the display device 100 to reduce its counter electrode layer. 115 to avoid affecting the touch effect due to its interference.

Please also refer to FIG. 5 , the second shielding layer 15 is disposed on the second surface 113 for shielding the leads 17 so as to prevent the overlapping area of the leads 17 from being caused by different leads 17 when the touch screen 10 is touched. Both will produce different sizes of capacitance to ground and the phenomenon of misreporting points will occur.

Please also refer to FIG. 6 , when the touch screen 10 is touched, the touch chip 17 measures the capacitance Cx between the finger and the electrode 115, because the capacitance Cx=εS/d, where ε is the value of the two parallel plates forming the touch screen 10 Dielectric constant, S is the relative area of two parallel plates forming the touch screen 10, d is the distance between the finger and the electrode 115, therefore, the distance d between the finger and the electrode 115 is proportional to the capacitance Cx between the finger and the electrode 115 Inversely proportional to the linear relationship, the distance d between the finger and the electrode 115 can be obtained by measuring the capacitance Cx between the finger and the electrode 115, and then the specific coordinates of the touch point can be determined to achieve the floating touch effect.

The touch screen 10 of the present invention determines the coordinates of the touch points by connecting the electrodes 115 to the touch chip 17 in the form of wires, thereby realizing multi-touch. At the same time, the distance d between the finger and the electrode 115 can be obtained by measuring the capacitance Cx between the finger and the electrode 115 , and then the specific coordinates of the touch point can be determined to achieve the floating touch effect. In addition, the first shielding layer 13 and the second shielding layer 15 disposed on both sides of the electrode layer 11 can effectively avoid external interference.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Those of ordinary skill in the art can understand all or part of the process for realizing the above embodiments, and according to the rights of the present invention The equivalent changes required still belong to the scope covered by the invention.

Claims (7)

1. a kind of touch-screen, including：

Electrode layer, the electrode layer includes electrode, and the electrode is arranged in array；

Touch chip, each described electrode is connected to the touch chip by gage system, works as touch-screen During by touch-control, corresponding electrode sends to touch chip touching signals by corresponding lead, and it is carried out Independent control, touch chip determines the corresponding coordinate of touch point according to touching signals.

2. touch-screen as claimed in claim 1, it is characterised in that the electrode pattern can be rectangle, water chestnut Shape and polygon.

3. touch-screen as claimed in claim 1, it is characterised in that the arrangement mode of the lead can be suitable Sequence arrangement, cross arrangement and mixing arrangement.

4. touch-screen as claimed in claim 1, it is characterised in that the touch-screen also includes the first shielding Layer, described electrode layer includes the first surface towards substrate, and the first screen layer is arranged at described the One surface.

5. touch-screen as claimed in claim 4, it is characterised in that the touch-screen also includes secondary shielding Layer, the electrode layer also includes the second surface relative with first surface, and the secondary shielding layer is arranged at institute State second surface.

6. touch-screen as claimed in claim 1, it is characterised in that when touch-screen is by touch-control, finger with Electric capacity between the distance between electrode and finger and electrode is inversely proportional linear relationship, by measuring finger with electricity Electric capacity between pole can determine that the distance between finger and electrode, and then determine the specific coordinate of touch point.

7. a kind of display device, it includes display screen and sets gradually touch-screen and lid thereon, and it is special Levy and be, touch-screen of the touch-screen described in any one in claim 1-6.