TWM615338U - Touch screen and input device with the same - Google Patents

Abstract

A touch screen and an input device with the touch screen are provided. The input device includes an active pen, a touch screen and a touch chip. The touch screen includes a driving layer and a sensing layer, the driving layer includes a number of driving channels, the sensing layer includes a number of sensing channels. The sensing channels and the driving channels are arranged crosswise, each side of the sensing channel defines a branch, and branches of two adjacent sensing channels are alternately arranged. The branches on the sensing channel can reduce a size of a blind area between electrode structures of the touch screen, increase the amount of touch sensing change caused by the coupling of the electrodes of the active pen and the electrodes of the touch screen, and improve recognition accuracy of the tilt angle of the active pen, thereby improving the touch accuracy and linearity of the active pen.

Description

Touch screen and input device with the touch screen

The invention relates to the technical field of touch control, in particular to a touch screen and an input device with the touch screen.

With the development of science and technology, active pens with touch screens as input devices have been widely used in various fields. When the touch screen is touched, the capacitive coupling between the active pen and the touch screen can obtain the position and tilt angle of the active pen, and the tilt angle is used to calibrate the position of the active pen. When the active pen is 90° perpendicular to the touch screen, the position of the pen’s center of gravity completely coincides with the position of the pen tip. When the active pen is tilted at a certain angle, the center of gravity of the active pen tip will shift a certain distance along the tilt angle. At this time, precision is required. The tilt angle of the active pen is recognized to calibrate the position deviation caused by the shift of the center of gravity. Otherwise, the touch position displayed on the touch screen may be under the active pen, which affects the user's normal input.

The electrode structure of the existing touch screen sensor usually has a large blind area. The blind area can also be called a touch invalid area. When the active pen touches, due to the small contact area of the pen tip and the large blind area size, it is easy to cause the active pen. The amount of touch sensing change caused by the coupling of the internal electrode and the internal electrode of the touch screen is too small, so that although the actual tilt angle of the active pen is the same in each position, the tilt angle calculated at different positions is very different, which affects the active pen’s performance. Touch accuracy and linearity.

It is necessary to provide a touch screen and an input device with the touch screen, which can reduce the size of the blind area between the electrode structures of the touch screen.

The present model provides a touch screen, including a driving layer and a sensing layer, the driving layer includes a plurality of driving channels, the sensing layer includes a plurality of sensing channels, the sensing channels and the driving channels are arranged crosswise, the sensing The sides of the channel are provided with branches, and the branches on two adjacent sensing channels are arranged alternately.

Preferably, the sensing channel, the branch and the driving channel are rectangular.

Preferably, a plurality of the sensing channels are arranged in parallel with each other, a plurality of the driving channels are arranged in parallel with each other, and the sensing channels and the driving channels are arranged perpendicularly and crossing each other.

Preferably, the extension direction of the plurality of branches is perpendicular to the extension direction of the sensing channel.

The present invention also provides an input device, which includes an active pen, the above-mentioned touch screen and a touch chip.

Preferably, two electrodes are provided in the active pen, namely a first electrode provided in the pen tip area and a second electrode provided above the first electrode.

The above-mentioned touch screen and the input device with the touch screen are provided with branches on the sensing channel, which can reduce the size of the blind area between the electrode structures of the touch screen and increase the touch generated by the coupling of the active pen electrode and the touch screen electrode. It controls the sensing change and improves the recognition accuracy of the tilt angle of the active pen, thereby improving the touch accuracy and linearity of the active pen.

1: input device

10: Active pen

101: nib

102: first electrode

103: second electrode

20: Touch screen

21: Sensing layer

210: Sensing channel

211: The first induction channel

212: Second sensing channel

2100: branch

2101: The first branch

2102: The second branch

22: drive layer

220: drive channel

30: Touch chip

FIG. 1 is a schematic diagram of the structure of the input device in the preferred embodiment of the new type.

FIG. 2 is a schematic diagram of the pattern of the touch screen in the preferred embodiment of the new type.

In order to be able to understand the above objectives, features and advantages of the present invention more clearly, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the application and the features in the embodiments can be combined with each other if there is no conflict.

In the following description, many specific details are explained in order to fully understand the present invention. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments, and are not intended to limit the present invention.

Please refer to FIG. 1, which is an input device 1 provided by a preferred embodiment of the present invention.

The input device 1 includes, but is not limited to, an active pen 10, a touch screen 20 and a touch chip 30. The touch screen 20 is installed on an electronic device. In this embodiment, the electronic device is a smart phone, a personal computer, or a smart wearable device. The active pen 10 is used to generate touch sensing with the touch screen 20 when it is in contact with and close to the touch screen 20. The touch chip 30 is used to determine the touch position according to the touch sensing signal between the active pen 10 and the touch screen 20.

In this embodiment, the active pen 10 is provided with two electrodes, namely a first electrode 102 provided in the area of the pen tip 101 and a second electrode 103 provided above the first electrode 102. The distance H between the first electrode 102 and the second electrode 103 is known. When the active pen 10 is in contact with or close to the touch screen 20, the first electrode 102 and the second electrode 103 and the touch screen 20 will generate a touch sensing change amount, by means of the touch chip 30 calculates two corresponding coordinate values, and then obtains the horizontal distance of the two coordinates as h, and further determines the inclination angle A of the active pen 10 according to the cosine function. Among them, A=90 °-arccos(h/H). In this way, when the accuracy of the two coordinate values calculated by the touch chip 30 is higher, the finally calculated tilt angle of the active pen is closer to the actual tilt angle, so that the writing experience presented on the touch screen 20 after correction is more realistic.

Please refer to FIG. 2, the touch screen 20 includes a sensing layer 21 and a driving layer 22. In this embodiment, the sensing layer 21 includes a plurality of sensing channels 210, and a plurality of branches 2100 are provided on the sides of the sensing channels 210. The driving layer 22 includes a plurality of driving channels 220. The sensing channel 210 and the driving channel 220 are arranged crosswise.

It is understandable that the plurality of branches 2100 provided on the sensing channel 210 can reduce the size of the blind zone between channels, so that the sensing variable when the active pen 10 touches the blind zone position becomes larger than the prior art. It is more continuous, and the calculation accuracy of the touch point coordinates is improved, thereby effectively improving the recognition accuracy of the tilt angle of the active pen 10.

In this embodiment, the sensing channel 210, the branch 2100, and the driving channel 220 are rectangular. Wherein, a plurality of the sensing channels 210 are arranged in parallel with each other, a plurality of the driving channels 220 are arranged in parallel with each other, and the sensing channels 210 and the driving channels 220 are arranged perpendicularly and intersecting. Preferably, the extension direction of the plurality of branches 2100 is perpendicular to the extension direction of the sensing channel 210.

In this embodiment, taking any two adjacent channels of the sensing channel 210 as an example, the any two adjacent channels are the first sensing channel 211 and the second sensing channel 212. The first sensing channel 211 and the second sensing channel 212 are insulated.

In this embodiment, a plurality of first branches 2101 are provided on both sides of the first sensing channel 211, and a plurality of second branches 2102 are provided on both sides of the second sensing channel 212. The first branch 2101 and the second branch 2102 are arranged alternately.

When the active pen 10 contacts or approaches the touch screen 20, the touch screen 20 acquires the first sensing signal and the first sensing signal generated by the two electrodes of the active pen 10 on the touch screen 20, respectively. Two senses According to the response signal, the tilt angle of the active pen 10 is determined according to the first sensing signal and the second sensing signal.

In this embodiment, the two electrodes of the active pen 10 are signal transmitting devices, and the sensing channel 210 and the driving channel 220 of the touch screen 20 are both signal receiving devices. The touch chip 30 receives the signal from the first electrode 102 of the pen tip 101 on the active pen 10 through the sensing channel 210 and the drive channel 220 of the touch screen 20 (the coupling of the active pen electrode and the touch screen electrode) Capacitance) to identify the first set of X and Y coordinate positions of the active pen tip. The touch chip 30 further receives the signal from the second electrode 103 on the active pen 10 above the first electrode 102 of the pen tip 101 through the sensing channel 210 and the driving channel 220 of the touch screen 20 (the active pen electrode and the touch Control the coupling capacitance of the screen electrode) to identify the second set of X and Y coordinate positions of the active pen tip. The touch chip 30 further calculates the tilt angle of the active pen 10 by calculating the distance between the two sets of coordinate positions and the distance between the first electrode 102 and the second electrode 103 on the active pen 10.

It can be understood that the alternate arrangement of the first branch 2101 and the second branch 2102 can further reduce the size of the blind area in the transition area between channels, so that the amount of change of the entire screen is relatively large when the active pen touches. The touch accuracy and linearity of different positions on the screen are greatly improved, and the calculation accuracy of touch coordinates is greatly improved, so that the error between the tilt angle of the active pen recognized at different positions and the actual tilt angle is very small.

The touch screen and the input device with the touch screen provided by the present invention are provided with branches on the sensing channel, which can reduce the size of the blind area between the electrode structures of the touch screen and increase the coupling between the active pen electrode and the touch screen electrode The generated touch sensing variation improves the recognition accuracy of the tilt angle of the active pen, thereby improving the touch accuracy and linearity of the active pen.

In summary, this new model meets the requirements for a new patent, and Yan has filed a patent application in accordance with the law. However, the above are only the preferred embodiments of the present invention. For those who are familiar with the technique of this case, the equivalent modifications or changes made in accordance with the spirit of the present invention shall be covered by the scope of the following patent applications.

10: Active pen

20: Touch screen

21: Sensing layer

210: Sensing channel

211: The first induction channel

212: Second sensing channel

2100: branch

2101: The first branch

2102: The second branch

22: drive layer

220: drive channel

Claims (6)

A touch screen includes a driving layer and a sensing layer, wherein the driving layer includes a plurality of driving channels, the sensing layer includes a plurality of sensing channels, the sensing channels and the driving channels are arranged intersectingly, the sensing channels Branches are arranged on the sides of the two adjacent sensing channels, and the branches are arranged alternately. The touch screen according to claim 1, wherein the sensing channel, the branch and the driving channel are rectangular. The touch screen according to claim 2, wherein a plurality of the sensing channels are arranged in parallel with each other, a plurality of the driving channels are arranged in parallel with each other, and the sensing channels and the driving channels are arranged perpendicularly intersecting. The touch screen according to claim 1, wherein the extension direction of the plurality of branches is perpendicular to the extension direction of the sensing channel. An input device, wherein the input device includes an active pen, and further includes a touch screen and a touch chip as described in any one of claim items 1 to 4, and the active pen is used for contacting and close to the touch When the screen is controlled, touch sensing is generated with the touch screen, and the touch chip is used to determine a touch position according to the touch sensing signal between the active pen and the touch screen. The input device according to claim 5, wherein the active pen is provided with two electrodes, namely a first electrode provided on the pen tip area and a second electrode provided above the first electrode.

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