Patent ID: 12236037

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The technical solutions in the embodiments of the present application will be clearly and completely described in the following with reference to the accompanying drawings in the embodiments. It is apparent that the described embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by a person skilled in the art based on the embodiments of the present application without creative efforts are within the scope of the present application.

The present application provides a touch control device including a touch control substrate. The touch control substrate includes a base and a touch control circuit arranged on the base. The touch control device further includes a touch control mode switching circuit electrically connected to the touch control circuit, the touch control mode switching circuit controls the touch control circuit to switch between a capacitive touch control circuit and an electromagnetic touch control circuit, and at least part of sensing signal lines of the capacitive touch control circuit also serves as sensing signal lines of the electromagnetic touch control circuit. In the present application, by having the sensing signal lines of the capacitive touch control circuit serve as the sensing signal lines of the electromagnetic touch control circuit, and adding a touch control mode switching circuit to control switching between the capacitive touch control circuit and the electromagnetic touch control circuit, the touch control device that can be compatible with more touch control modes is realized without an additional film structure.

Embodiment 1 provided by the present application is shown inFIGS.1to3. This embodiment provides a touch control device100including a touch control substrate1and a touch control mode switching circuit2.

The touch control substrate1includes a base11and a touch control circuit12provided on the base11. When the touch control device1is a touch control display device, the touch control substrate1may be a display panel provided with a display component, and the touch control circuit12is located in the display area of the display panel to realize the touch control display of the display panel. The touch control circuit12is electrically connected to the touch control mode switching circuit2. The touch control mode switching circuit2controls the touch control circuit12to switch between the capacitive touch control circuit and the electromagnetic touch control circuit.

In this embodiment, the touch control circuit12includes multiple rows of first touch control lines121and multiple columns of second touch control lines122. The first touch control lines121and the second touch control lines122are arranged alternately and insulated from each other. The touch control mode switching circuit2includes a first switch control circuit21, a second switch control circuit22, and a touch control chip23. The first switch control circuit21is electrically connected to at least two rows of first touch control lines121. The second switch control circuit22is electrically connected with at least two columns of second touch control lines122. Specifically, the first switch control circuit21includes a plurality of first switches211. Opposite terminals of each first switch211are respectively electrically connected to two adjacent rows of first touch control lines121. The second switch control circuit22includes a plurality of second switches222. Opposite terminals of each second switch222are electrically connected to two adjacent rows of second touch control lines122respectively.

When the first switch control circuit21and the second switch control circuit22are both in an off mode, the plurality of first switches211and the plurality of second switches222are all turned off, and the touch control circuit12is a mutual capacitive touch control circuit. As shown in conjunction withFIG.2, the multiple rows of first touch control lines121are independent of each other, that is, the multiple rows of first touch control lines121are all disconnected. The multiple rows of second touch control lines122are independent of each other, that is, the multiple rows of second touch control lines122are all disconnected. In this embodiment, the first touch control lines121are transmission signal lines. The second touch control lines122are sensing signal lines. The touch control chip23outputs touch control emission signals to the first touch control lines121. The second touch control lines122feed back touch control sensing signals to the touch control chip23to realize mutual capacitive touch control. It is appreciated that in other specific embodiments of the present application, the first touch control line121may also be used as a sensing signal line. The second touch control line122serves as a transmission signal line. The touch control chip23outputs a touch control transmission signal to the second touch control line122. The first touch control line121feeds back touch control sensing signals to the touch control chip23to realize mutual capacitive touch control.

When the first switch control circuit21and the second switch control circuit22are both in an on mode, the plurality of first switches211and the plurality of second switches222are all turned on, and the touch control circuit12is an electromagnetic touch control circuit. As shown inFIG.3, two adjacent rows of the first touch control lines121are electrically connected, and two adjacent columns of second touch control lines122are electrically connected. The first touch control lines121and the second touch control lines122are both sensing signal lines at this time. The touch control chip23is built with a first current measuring device26and a second current measuring device27. Opposite terminals of the first current measuring device26are respectively electrically connected to two rows of first touch control lines121that are electrically connected to each other. The second current measuring device27is electrically connected to two rows of second touch control lines122that are electrically connected to each other, respectively. Both the first touch control line121and the second touch control line122feed back touch control sensing signals to the touch control chip23to achieve electromagnetic touch control.

In this embodiment, the second touch control line122is not only a sensing signal line of a mutual capacitive touch control circuit, but also a sensing signal line of an electromagnetic touch control circuit. That is, the sensing signal line of the capacitive touch control circuit also serves as the sensing signal line of the electromagnetic touch control circuit. Moreover, all the sensing signal lines of the capacitive touch control circuit are used as the sensing signal lines of the electromagnetic touch control circuit. When the touch control device100is a touch control display device, the portion of the second touch control lines122that is located in the display area of the display panel and serves as the sensing signal lines of the capacitive touch control circuit also serves as the sensing signal lines of the electromagnetic touch control circuit. In other words, the portion of the second touch control lines122located in the display area of the display panel will all be used as the sensing signal lines of the capacitive touch control circuit and the sensing signal lines of the electromagnetic touch control circuit.

It is appreciated that in other embodiments of the present application, in order to have other functions or effects such as repair and signal transmission, the capacitive sensing signal lines of the capacitive touch control circuit can be partially used as the electromagnetic sensing signal lines of the electromagnetic touch control circuit, which is not specifically limited herein.

In this embodiment, the first touch control lines121and the second touch control lines122are located on different layers that are insulated from each other. In the OLED display panel, the first touch control lines121and the second touch control lines122may be respectively arranged on opposite sides of the cover plate, or be insulated from each other and arranged on the same side of the cover plate. In a liquid-crystal display (LCD) display panel, the first touch control lines121and the second touch control lines122may be respectively arranged on opposite sides of the glass substrate, or insulated from each other on the same side of the glass substrate. It is appreciated that in other embodiments of the present application, the first touch control lines121and the second touch control lines122may be provided in the same layer. The first touch control lines121or the second touch control lines122are bridged by conductive structures located in other layers at the intersection of the two, which is not specifically limited herein.

It is appreciated that, in other embodiments of the present application, there is at least one first touch control line121or at least one second touch control line122that is not electrically connected to the switch control circuit, and is used for repair or for a single touch control mode, which is not specifically limited herein.

It is appreciated that, in other embodiments of the present application, opposite terminals of each first switch211are electrically connected to two non-adjacent rows of first touch control lines121, or opposite terminals of each second switch222are respectively connected to two non-adjacent rows of second touch control lines122. Redundant touch control lines are arranged between two rows or two columns of touch control lines electrically connected to the same switch, which is not specifically limited herein.

It is appreciated that the touch control mode switching circuit2can be provided on the touch control substrate1or can be provided on an external circuit board or flexible circuit board, which is not specifically limited herein. The external circuit board or flexible circuit board can be located on an opposite side to the driving chip of the display panel. Specifically, if the driving chip of the display panel is located on the left and lower sides of the display panel, the external circuit board or flexible circuit board provided with the touch control mode switching circuit2can be arranged on the right and upper sides of the display panel.

It is appreciated that the first switch control circuit21and/or the second switch control circuit22in the touch control mode switching circuit2can be built into the touch control chip23, or can be provided on the touch control substrate1, or can be provided on the external circuit board or flexible circuit board, which is not specifically limited herein.

Embodiment 2 provided by the present application is shown inFIGS.4and5. This embodiment provides a touch control device200including a touch control substrate1and a touch control mode switching circuit2.

The touch control substrate1includes a base11and a touch control circuit12provided on the base11. When the touch control device1is a touch control display device, the touch control substrate1may be a display panel provided with a display component, and the touch control circuit12is located in the display area of the display panel to realize the touch control display of the display panel. The touch control circuit12is electrically connected to the touch control mode switching circuit2. The touch control mode switching circuit2controls the touch control circuit12to switch between the capacitive touch control circuit and the electromagnetic touch control circuit.

In this embodiment, the touch control circuit12includes a plurality of sensing circuit units123. Each sensing circuit unit123includes a third touch control line124arranged in a coil shape. Opposite terminals of the third touch control line124are electrically connected to the touch control mode switching circuit2respectively.

The touch control mode switching circuit2includes a touch control chip23and a selection switch control circuit24. The selection switch control circuit24includes a plurality of selection switches241. A first terminal of each third touch control line124is electrically connected to a selection terminal S of a selection switch241. A second terminal of each third touch control line124is electrically connected to the touch control chip23. In the illustrated embodiment, the second terminal of a third touch control line124is electrically connected to a first signal terminal P of the touch control chip23. A first channel S1corresponding to the selection switch241is electrically connected to a second signal terminal Q of the touch control chip23. A second channel S2of the selection switch241is electrically connected to the first signal terminal P of the touch control chip23.

When the selection switches241in the selection switch control circuit24all select the second channel S2, as shown inFIG.4, the first terminal of the third touch control line124is electrically connected to the first signal terminal P of the touch control chip23. That is, the first terminal of the third touch control line124and the second terminal of the third touch control line124are conducted and electrically connected to the first signal terminal P of the touch control chip23. In this case, the touch control circuit12is a self-capacitive touch control circuit. The third touch control line124is a capacitive sensing signal line. The third touch control line124itself forms a closed loop through the selection switch241. The third touch control line124feeds back the touch control sensing signal generated by the closed loop to the touch control chip23to realize self-capacitive touch control.

When the selection switches241in the selection switch control circuit24all select the first channel S1, as shown inFIG.5, the first terminal of the third touch control line124is electrically connected to the second signal terminal Q of the touch control chip23. The second terminal of the third touch control line124is electrically connected to the first signal terminal P of the touch control chip23. The touch control circuit12is an electromagnetic touch control circuit. The third touch control line124is formed into a coil-shaped electromagnetic sensing circuit. The third touch control line124is an electromagnetic sensing signal line in this case. When the touch control circuit12is an electromagnetic touch control circuit, the touch control switching circuit2further includes a third current measuring device25electrically connected to the first terminal and the second terminal of the third touch control line124, respectively. The third current measuring device25measures a sensing current fed back by the third touch control line124to the touch control chip23to realize electromagnetic touch control.

In this embodiment, the third touch control line124is both a capacitive sensing signal line of a self-capacitive touch control circuit and an electromagnetic sensing signal line of an electromagnetic touch control circuit. That is, the sensing signal line of the capacitive touch control circuit also serves as the sensing signal line of the electromagnetic touch control circuit. Moreover, all the sensing signal lines of the capacitive touch control circuit are used as the sensing signal lines of the electromagnetic touch control circuit. When the touch control device200is a touch control display device, the portion of the third touch control lines124that is located in the display area of the display panel and serves as the sensing signal lines of the capacitive touch control circuit also serves as the sensing signal lines of the electromagnetic touch control circuit. In other words, all of the portion of the third touch control lines124located in the display area of the display panel is used as the sensing signal lines of the capacitive touch control circuit and the sensing signal lines of the electromagnetic touch control circuit.

It is worth noting thatFIGS.4and5only show the selection switch control circuit24corresponding to the portion of the third touch control lines124, and the remaining portion of the third touch control lines124corresponding to the same circuit design as the selection switch control circuit24is not drawn repeatedly due to the limited space of the figure.

It is appreciated that in other embodiments of the present application, in order to have other functions or effects such as repair and signal transmission, the capacitive sensing signal lines of the capacitive touch control circuit can be partially used as the electromagnetic sensing signal lines of the electromagnetic touch control circuit, which is not specifically limited herein.

It is appreciated that in other embodiments of the present application, the third touch control line124may be located on the cover plate of the OLED display panel or on the glass substrate of the LCD display panel, which is not specifically limited herein.

It is appreciated that in other embodiments of the present application, there is at least one third touch control line124that is not electrically connected to the selection switch control circuit24, and is used for repair or as a single touch control mode, which is not specifically limited herein.

It is appreciated that the touch control mode switching circuit2can be provided on the touch control substrate1or can be provided on an external circuit board or flexible circuit board, which is not specifically limited here. The external circuit board or flexible circuit board can be located on the opposite side to the driving chip of the display panel. Specifically, if the driving chip of the display panel is located on the left and lower sides of the display panel, the external circuit board or flexible circuit board provided with the touch control mode switching circuit2can be arranged on the right and upper sides of the display panel.

It is appreciated that the selection switch control circuit24in the touch control mode switching circuit2can be built into the touch control chip23, can also be provided on the touch control substrate1, or can be provided on the external circuit board or flexible circuit board, which is not specifically limited herein.

It is appreciated that the first current measuring device26, the second current measuring device27, and the third current measuring device25mentioned in the present application can be implemented by a structure built within the touch control chip23, or they can be current measuring devices arranged outside the touch control chip23, which is not specifically limited herein.

In a specific embodiment of the present application, when the touch control device is a touch control display device, in one scan period of the display panel, the touch control mode switching circuit controls the touch control circuit to switch between the capacitive touch control circuit and the electromagnetic touch control circuit at least once.

That is, in one scan period of the display panel, the touch control circuit12first detects whether there is a finger touch control through the capacitive touch control circuit, and then detects whether there is a stylus touch control through the electromagnetic touch control circuit, so that the touch control device can provide capacitive touch control mode and electromagnetic touch control mode at the same time, to enhance the recognition ability of the touch control device and expand application scenarios of touch control devices.

In the present application, by adding a touch control mode switching circuit, the touch control circuit is controlled to switch between the capacitive touch control circuit and the electromagnetic touch control circuit, so that the touch control device can switch between the capacitive touch control mode and/or electromagnetic touch control mode, thereby expanding application scenarios of the touch control device. In addition, the sensing signal lines in the capacitive touch control mode also serve as the sensing signal lines in the electromagnetic touch control mode, which eliminates a need to increase a thickness of the existing touch control device, thus being conducive to a thin and light design of the touch control device.

The touch control device provided in the embodiments of the present application have been described in detail above. Specific examples are used to explain the principle and implementation of the present application. The descriptions of the above embodiments are only used to help understand the present application. Also, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as limiting the present application.