CN102043498B - touch device - Google Patents

Abstract

A touch device includes a plurality of row electrodes, a plurality of column electrodes, and a plurality of sensing elements. The sensing elements are used for detecting touch positions according to the potentials of the row electrodes and the column electrodes, and the sensing elements at least comprise a first sensing element and a second sensing element. The first sensing element is respectively coupled to a first part of the row electrodes and a first part of the column electrodes. And the second sensing element is respectively coupled to a row electrode of a second part different from the first part in the row electrodes and a column electrode of the second part different from the first part in the column electrodes. The touch device can effectively reduce the scanning time without increasing the manufacturing cost.

Description

touch device

technical field

The invention relates to a touch device, in particular to a touch device capable of shortening scanning time.

Background technique

General computer information products mostly use user interfaces such as keys, keyboards or mice to input data. However, with the advent of the touch panel, users can use another convenient method for data input. Touch panels and related control devices are common in general portable products, and are used to facilitate users to click functions or other objects on the screen. Touch devices include projected capacitive touch (Projected Capacitive Touch) devices and matrix resistive touch (Matrix Resistive Touch) devices, in which projected capacitive touch devices support multi-touch (multi touch), higher Light transmittance and power saving characteristics are widely used in portable devices such as mobile phones and car navigators. With the demand for touch control of notebook computers, projected capacitive touch devices are gradually being used on larger-sized panels. However, as the size of the panel increases, the number of electrodes required to realize the projected capacitance will also increase accordingly; resulting in the need to use multiple sensing chips to realize the precise touch function. However, the more sensing electrodes there are, the longer it takes to sense the finger. The speed at which the touch device responds to the touch point of the main system (such as: mobile phone, computer) will decrease.

Please refer to FIG. 1 , which is a schematic diagram of a projected capacitive touch device 100 in the prior art. The projected capacitive touch device 100 includes a plurality of row (Row) electrodes R ₁ -R _n , a plurality of column (Column) electrodes C ₁ -C _m perpendicular to the row electrodes R ₁ -R _n , a first sensing element 110 And the second sensing element 120 is used to provide the user with a touch action. The first sensing element 110 includes a multiplexer (Multiplexer) 112 and an analog-to-digital converter (Analog-to-Digital Converter, ADC) 114 . The second sensing element 120 also includes a multiplexer 122 and an analog-to-digital converter 124 . The row electrodes R ₁ -R _n and the column electrodes C ₁ -C _m are used to sense capacitance, and the analog-to-digital converters 114 and 124 in the sensing elements generate digital output voltages as output signals of the projected capacitive touch device 100 . Moreover, any one of these electrodes corresponds to an environmental capacitance parameter according to its physical characteristics. Therefore, when the projected capacitive touch device 100 is touched, the analog output voltages of some specific electrodes will be corresponding. changed. The first sensing element 110 is respectively coupled to the row electrodes R ₁ -R _n , and is used to generate a digital output voltage according to the potential change of the row electrodes R ₁ -R _n to determine the touch position; in addition, the second sensing element 120 is respectively It is coupled to the column electrodes C ₁ -C _m , and is used to generate a digital output voltage according to the potential change of the column electrodes C ₁ -C _m to determine the touch position.

The projected capacitive touch device 100 determines the touch position by scanning. During scanning, the row electrodes R ₁ ˜R _n provide potentials and the column electrodes C ₁ ˜C _m perform sensing and scanning, or the column electrodes C ₁ ˜C _m provides potentials and the row electrodes R ₁ ˜R _n perform sensing and scanning to operate. That is to say, when the row electrodes R ₁ -R _n provide potentials, only the multiplexer 122 of the second sensing element 120 will transmit the voltage signals on the column electrodes C ₁ -C _m to the subsequent analog-to-digital converter 124 Do a sensory scan. When the column electrodes C ₁ -C _m provide potentials, only the multiplexer 112 of the first sensing element 110 transmits the voltage signals on the row electrodes R ₁ -R _n to the subsequent analog-to-digital converter 114 for sensing scanning. In the conventional component configuration, only one of the ADCs 114 and 124 is actually performing the sensing scan at the same time as the sensing scan, so that the overall sensing scan time cannot be optimized. Therefore, how to effectively reduce the scan time of the touch device without increasing the manufacturing cost of the touch device has become an urgent problem in the industry.

Contents of the invention

Therefore, one of the objectives of the present invention is to provide a touch device capable of shortening the scanning time, so as to solve the above problems.

According to an embodiment of the present invention, a touch device is disclosed. The touch device includes: a plurality of row electrodes, a plurality of column electrodes and a plurality of sensing elements. The sensing elements are used to detect the touch position according to the potentials of the row electrodes and the column electrodes, and the sensing elements at least include a first sensing element and a second sensing element. The first sensing element is respectively coupled to a first part of the row electrodes of the row electrodes and a first part of the column electrodes of the column electrodes. And the second sensing element is respectively coupled to the row electrode of the second part of the row electrodes different from the first part and the column electrode of the second part of the column electrodes different from the first part.

According to an embodiment of the present invention, the touch device further includes a row electrode coupled to the first sensing element and the second sensing element.

According to an embodiment of the present invention, the touch device further includes a column electrode coupled to the first sensing element and the second sensing element.

According to the touch device of the present invention, in one embodiment, the number of row electrodes in the first part is equal to the number of row electrodes in the second part.

According to the touch device of the present invention, in an implementation manner, the number of the column electrodes in the first part is equal to the number of the column electrodes in the second part.

According to the touch device of the present invention, in one embodiment, the number of row electrodes in the first part is equal to the number of row electrodes in the second part, and the number of column electrodes in the first part is equal to that in the second part. The number of electrodes in the column electrode.

According to the touch device of the present invention, in one implementation manner, the first part of the row electrodes includes a plurality of consecutive row electrodes among the plurality of row electrodes.

According to the touch device of the present invention, in one implementation manner, the first part of the column electrodes includes a plurality of continuous row electrodes among the plurality of column electrodes.

According to the touch device of the present invention, in one implementation manner, the row electrodes of the second part include a plurality of consecutive row electrodes among the plurality of row electrodes.

According to the touch device of the present invention, in one implementation manner, the column electrodes of the second part include a plurality of continuous column electrodes among the plurality of column electrodes.

According to the touch device of the present invention, in one embodiment, the plurality of row electrodes and the plurality of column electrodes are driving/sensing electrodes.

In one embodiment, the touch device according to the present invention is a capacitive touch panel.

Description of drawings

FIG. 1 is a schematic diagram of a conventional projected capacitive touch device.

FIG. 2 is a schematic diagram of an embodiment of the touch device of the present invention.

FIG. 3 is a schematic diagram of another embodiment of the touch device of the present invention.

Detailed ways

Certain terms are used in the specification and appended claims to refer to particular elements. Those of ordinary skill in the art should understand that hardware manufacturers may use different terms to refer to the same element. The description and the appended claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. "Includes" mentioned throughout the specification and appended claims is an open term, so it should be interpreted as "including but not limited to". In addition, the term "coupled" herein includes any direct and indirect means of electrical connection. Therefore, if it is described that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

Please refer to FIG. 2 , which is a schematic diagram of an embodiment of the touch device of the present invention. The touch device 200 includes (but not limited to) a plurality of row electrodes Ro ₁ ˜R _n , a plurality of column electrodes Co _{1 ˜Com} perpendicular to the row electrodes Ro ₁ ˜R _n , a first sensing element 210 and a second sensing element 210 . The detection element 220 is used to provide the user with a touch action, wherein the row electrodes Ro _{1 -Ron} and the column electrodes Co ₁ -Co _m are drive/sensing (Drive/Sensor) electrodes. The first sensing element 210 includes a multiplexer 212 and an analog-to-digital converter 214 . Similarly, the second sensing element 220 also includes a multiplexer 222 and an analog-to-digital converter 224 . The row electrodes Ro _{1 -Ron} and the column electrodes Co ₁ -Co _m are used to sense the voltage level (or level) of the capacitance, and the analog-to-digital converters 214, 224 in the sensing elements are used to generate digital output voltages as triggers. The output signal of the control device 200. The first sensing element 210 is respectively coupled to the row electrodes Ro ₁ -Ro _{n /2} of the first part of the row electrodes Ro ₁ -Ron and the column electrodes Co ₁ -Co _m / of the first part of the column electrodes Co ₁ -Co _{m 2} , used to generate a digital output voltage according to the potential changes of the row electrodes Ro ₁ -Ro _n/2 and the column electrodes Co ₁ -Co _m/2 to determine the touch position. The second sensing element 220 is respectively coupled to the second part of the row electrodes Ro _{n/2+1 to} Ro _n of the row electrodes Ro 1 to Ro _n and the second part of the column electrodes Co _m of the column electrodes Co ₁ to Co _{m /2+1} ˜Co _m , for generating a digital output voltage to determine the touch position according to the potential changes of the row electrodes Ro _{n/2+1 ˜Ron} and the column electrodes Co _m/2+1 ˜Co _m .

During sensing and scanning, if the potential is provided by the row electrodes Ro ₁ ˜R _n , the multiplexer 212 of the first sensing element 210 and the multiplexer 222 of the second sensing element 220 respectively connect the column electrodes Co ₁ ˜ The voltage signals on Co _m/2 , Co _m/2+1 ~Co _m are transmitted to the subsequent analog-to-digital converters 214, 224 for sensing and scanning; if the potential is provided by the column electrodes Co ₁ ~Co _m , the first sensor The multiplexer 212 of the sensing element 210 and the multiplexer 222 of the second sensing element 220 also respectively transmit the voltage signals on the row electrodes Ro ₁ ˜R _n/2 , Ro _n/2+1 ˜R _n to the subsequent Analog-to-digital converters 214, 224 are used for sensing scans.

Therefore, during the sensing and scanning process, no matter whether the potential is provided by the row electrodes Ro _{1 -Ron} or the column electrodes Co ₁ -Co _m , the analog-to-digital converters 214 and 224 can perform the sensing and scanning action simultaneously, so they can be effectively To shorten the sensing scan time.

Please note that in the above embodiment, the number of the column electrodes Co ₁ to Co _m/2 in the first part is equal to the number of the column electrodes Co _m/2+1 to Co _m in the second part, and the number of the row electrodes in the first part The number of electrodes Ro ₁ ~ Ro _n/2 is equal to the number of electrodes Ro _{1 ~ n/2+1} ~ Ro _n in the second part, and the row electrodes Ro ₁ ~ Ro _n/2 in the first part and the second part The row electrodes Ro _n/2+1 ~ R _n respectively include a plurality of continuous row electrodes, and the first part of the column electrodes Co ₁ ~ Co _m/2 and the second part of the column electrodes Co _m/2+1 ~ Co _m Each includes a plurality of continuous column electrodes, however, the distribution of the above-mentioned row electrodes Ro _{1 -Ron} and column electrodes Co _{1 -Com} is only used as an example for illustration, that is, the row electrodes Ro _{1 -Ron} are averaged Allocation of the column electrodes Co _{1 -Com} to multiple sensing elements is only a preferred embodiment of the present invention, without departing from the spirit of the present invention (that is, the same sensing element is coupled to different types of electrodes instead of only coupled to a single type of electrode), the distribution of other row electrodes Ro ₁ ~ _Ron and column electrodes Co ₁ ~ _Com also belongs to the scope of the present invention, for example, as long as the number of row electrodes in the first part is equal to that in the second part The number of electrodes of the row electrodes, as long as the number of electrodes of the column electrodes of the first part is equal to the number of electrodes of the column electrodes of the second part, as long as the row electrodes of the first part include a plurality of continuous row electrodes, as long as the rows of the second part The electrodes include a plurality of continuous row electrodes, as long as the column electrodes of the first part include a plurality of continuous row electrodes, or as long as the column electrodes of the second part include a plurality of continuous row electrodes, it shall be regarded as belonging to the scope of the present invention.

Please refer to FIG. 3 , which is a schematic diagram of another embodiment of the touch device of the present invention. The touch device 300 includes (but not limited to) a plurality of row electrodes Re ₁ ˜Re _n , a plurality of column electrodes Ce _{1 ˜Cem perpendicular to the row electrodes Re 1 ˜Re n , a} first sensing element 310 and a second sensing element 310 . The sensing element 320 is used for the user to perform a touch action, wherein the row electrodes Re ₁ -Re _n and the column electrodes Ce ₁ -Ce _m are all driving/sensing (or driving/sensing, Drive/Sensor) electrodes. The first sensing element 310 includes a multiplexer 312 and an analog-to-digital converter 314 . Similarly, the second sensing element 320 also includes a multiplexer 322 and an analog-to-digital converter 324 . The row electrodes Re ₁ -Re _n and the column electrodes Ce ₁ -Ce _m are used to sense the voltage level of the capacitance, and the analog-to-digital converters 314 and 324 in the sensing elements are used to generate digital output voltages as the output of the touch device 300 Signal. The first sensing element 310 is respectively coupled to the row electrodes Re ₁ -Re _{n /2} of the first part of the row electrodes Re ₁ -Re n and the column electrodes Ce ₁ -Ce _m / of the first part of the column electrodes Ce ₁ -Ce _{m 2} , used to generate a digital output voltage according to the potential changes of the row electrodes Re ₁ -Re _n/2 and the column electrodes Ce ₁ -Ce _m/2 to determine the touch position. The second sensing element 320 is respectively coupled to the row electrodes Re _n /2-Re _n of the second part of the row electrodes Re ₁ -Re _n and the column electrode Ce m/ ₂ of the second part of the column electrodes Ce ₁ -Ce _m ˜Ce _m , for generating a digital output voltage according to the potential changes of the row electrodes Re _n/2 ˜Re _n and the column electrodes Ce _m/2 ˜Ce _m to determine the touch position. The touch device 300 is different from the touch device 200 in FIG. 2 in that the first sensing element 310 and the second sensing element 320 are coupled to the row electrode Re _n/2 and the column electrode Ce _m/2 at the same time. In this way, the touch device 300 can more accurately perform sensing and scanning to determine the touch position.

The above-mentioned embodiments are only used to illustrate the technical characteristics of the present invention, and are not intended to limit the scope of the present invention. To sum up, the present invention provides a touch control device capable of shortening the scanning time. By properly distributing row electrodes and column electrodes to multiple sensing elements, during the sensing and scanning process, no matter whether the row electrodes or the column electrodes are To provide potentials, the analog-to-digital converters in multiple sensing elements can simultaneously perform sensing scanning operations, thus effectively shortening the sensing scanning time.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention.

Description of main component symbols

100, 200, 300 touch devices

110, 210, 310 The first sensing element

112, 122, 212, 222, 312, 322 Multi-taskers

114, 124, 214, 224, 314, 324 Analog to Digital Converter

120, 220, 320 Second sensing element.

Claims (10)

1. contactor control device comprises:

A plurality of column electrodes;

A plurality of row electrodes; And

A plurality of sensing elements are used for detecting position of touch according to the current potential of described a plurality of column electrodes and described a plurality of row electrodes, and described a plurality of sensing elements comprise at least:

First sensing element, it is respectively coupled to the row electrode of first in the column electrode of first in described a plurality of column electrode and the described a plurality of row electrode; And

Second sensing element, it is respectively coupled to the row electrode that is different from the second portion of described first in the column electrode of the second portion that is different from described first in described a plurality of column electrode and the described a plurality of row electrode,

Wherein, the column electrode sum of the column electrode of described first and described second portion is described a plurality of column electrode; And the row electrode sum of the row electrode of described first and described second portion is described a plurality of row electrode.

2. contactor control device according to claim 1, wherein, the number of poles of the column electrode of described first equals the number of poles of the column electrode of described second portion.

3. contactor control device according to claim 2, wherein, the number of poles of the row electrode of described first equals the number of poles of the row electrode of described second portion.

4. contactor control device according to claim 1, wherein, the number of poles of the row electrode of described first equals the number of poles of the row electrode of described second portion.

5. contactor control device according to claim 1, wherein, the column electrode of described first comprises a plurality of column electrodes continuous in described a plurality of column electrode.

6. contactor control device according to claim 1, wherein, the row electrode of described first comprises a plurality of row electrodes continuous in described a plurality of row electrode.

7. contactor control device according to claim 1, wherein, the column electrode of described second portion comprises a plurality of column electrodes continuous in described a plurality of column electrode.

8. contactor control device according to claim 1, wherein, the row electrode of described second portion comprises a plurality of row electrodes continuous in described a plurality of row electrode.

9. contactor control device according to claim 1, wherein, described a plurality of column electrodes and described a plurality of row electrode are driving/sensing electrode.

10. contactor control device according to claim 1, it is capacitance type touch-control panel.

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