WO2016101222A1

WO2016101222A1 - Touch control apparatus and terminal

Info

Publication number: WO2016101222A1
Application number: PCT/CN2014/094996
Authority: WO
Inventors: 梁艳峰; 谢亮; 罗红磊; 王浩
Original assignee: 华为技术有限公司
Priority date: 2014-12-25
Filing date: 2014-12-25
Publication date: 2016-06-30

Abstract

A touch control apparatus (10) and a terminal (20), which relate to the technical field of electronic devices, and can solve the problem that a terminal forms a touch control capacitor in a non-display area, which results in the effect of a false touch when a human hand touches. The apparatus (10) comprises: a first substrate (2) provided with a colour filter and a second substrate (5) provided with a thin film transistor, wherein a liquid crystal is sandwiched between the first substrate (2) and the second substrate (5), and is sealed via a frame sealing adhesive (3); a receiver (1) is arranged on a surface of the first substrate (2); a transmitter (4) is arranged on a surface of the second substrate (5), wherein the transmitter (4) is connected to a transmitter bus (9), the transmitter bus (9) is connected to an integrated circuit for detecting a signal, the transmitter (4) is connected to a drive circuit via a first soft circuit board (8), and the receiver (1) is connected to the drive circuit via a second soft circuit board (7); and a shielding electrode (11) is arranged on a surface of the transmitter bus (9). The apparatus (10) is applied to the terminal (20).

Description

Touch control device and terminal

Technical field

The present invention relates to the field of electronic device technologies, and in particular, to a touch control device and a terminal.

Background technique

At present, capacitive touch screens have been widely used in mobile phones and other terminals. It sets Tx (Transmitter), Rx (Receiver, Receiver) electrodes in the display area of the screen, Tx transmits signals, and Rx receives Tx transmissions. The signal is formed by using air or other substances as a medium to form a touch capacitor. LCD (liquid crystal display) is a kind of capacitive touch screen. It is provided with Tx or Rx on the surface of two parallel glass substrates in the display area, liquid crystal is placed in the middle, and the outer frame is sealed with sealing glue. The lower glass substrate is used. TFT (Thin Film Transistor) is disposed on the upper substrate, and CF (Color Filter) is disposed on the upper glass substrate. In the non-display area, both Tx and Rx need to be connected by a flexible printed circuit (FPC). The driver circuit, Tx also needs to connect the Tx bus to supply the Tx signal. When the terminal is running, the two electrodes of Tx and Rx form a touch capacitor in the display area. When the human finger touches the screen, the touch capacitance changes due to the conductivity of the human body, and the IC (Integrated Circuit) detects it. The change of the capacitance, and according to the change of the capacitance, determine the position of the finger touching the screen, and then react accordingly.

In the prior art, at least the following problem exists: since the Tx bus transmits the same signal as the Tx, the FPC connected to the Rx transmits the same signal as the Rx, so the Tx bus is equivalent to the emitter at the non-display area near the display area, and the connection is made. The FPC of Rx is equivalent to the receiving pole. The air is used as the medium between the two. The Tx bus transmits a signal, and the FPC receives the signal transmitted by the Tx bus to form a capacitor. When the terminal is running, the touch capacitance is also formed in the non-display area near the display area. When the human hand touches this area, the capacitance change is also caused. The capacitance change signal is transmitted to the connected Rx through the FPC connected to Rx. When the IC detects the capacitance change signal, it misjudges the capacitance change signal in the display area, thereby obtaining the wrong human touch position, resulting in an erroneous touch effect.

Summary of the invention

Embodiments of the present invention provide a device and a terminal for touch control, which can solve the problem that the terminal is not visible The display area forms a touch capacitor, and when touched by a human hand, the problem of an incorrect touch effect is caused.

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

In a first aspect, an embodiment of the present invention provides a touch control device including a first substrate provided with a color filter and a second substrate provided with a thin film transistor, the first substrate and the second substrate a liquid crystal is sandwiched between and sealed by a sealant; a surface is disposed on a surface of the first substrate; an emitter is disposed on a surface of the second substrate, and the emitter is connected to an emitter bus, and the emitter is The pole bus is connected to an integrated circuit for detecting signals, the emitter is connected to the driving circuit through a first flexible circuit board, the receiving pole is connected to the driving circuit through a second flexible circuit board, and the surface of the emitter bus is provided with a shielding electrode.

In conjunction with the first aspect, in a first possible implementation of the first aspect, the shield electrode is a conductor connected to a ground of the first flexible circuit board or the second flexible circuit board.

In conjunction with the first possible implementation of the first aspect, in a second possible implementation of the first aspect, the conductor is indium tin oxide ITO.

In a second aspect, an embodiment of the present invention provides a touch control terminal, including a touch control device, where the touch control device includes a first substrate provided with a color filter and a second substrate provided with a thin film transistor. Liquid crystal is sandwiched between the first substrate and the second substrate, and sealed by a sealant; a receiving electrode is disposed on a surface of the first substrate, and an emitter is disposed on a surface of the second substrate; The emitter is connected to an emitter bus, the emitter bus is connected to an integrated circuit for detecting signals, the emitter is connected to the driving circuit through a first flexible circuit board, and the receiving pole is connected by the second flexible circuit board a driving circuit, the emitter bus surface is provided with a shielding electrode.

In conjunction with the second aspect, in a first possible implementation of the second aspect, the shield electrode is a conductor connected to a ground of the first flexible circuit board or the second flexible circuit board.

In conjunction with the first possible implementation of the second aspect, in a second possible implementation of the second aspect, the conductor is indium tin oxide ITO.

Compared with the prior art, a touch control device and a terminal provided by an embodiment of the present invention, a first substrate provided with a color filter and a second substrate provided with a thin film transistor, the first substrate Liquid crystal is sandwiched between the second substrate and sealed by a sealant; on the first substrate The surface is provided with a receiving pole, an emitter is arranged on the surface of the second substrate, the emitter is connected to the emitter bus, the emitter bus is connected to the integrated circuit for detecting signals, the emitter is connected to the driving circuit through the first flexible circuit board, and the receiving pole passes through the first The two flexible circuit boards are connected to the driving circuit, and the surface of the emitter bus is provided with a shielding electrode. In this way, a shield electrode is disposed on the surface of the Tx bus to shield the signal transmitted by the Tx bus, so that the FPC connected to the Rx cannot receive the signal transmitted by the Tx bus, so that the non-display area near the display area, between the Tx bus and the FPC The same touch capacitance as the real area cannot be formed. When the human hand touches this area, it does not cause a change in capacitance, thereby avoiding an erroneous touch effect.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the prior art description will be briefly described below, and the drawings in the following description are only some embodiments of the present invention. Other figures may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic structural diagram of an LCD touch screen according to an embodiment of the present invention;

2 is a schematic diagram of a position of a Tx bus of an LCD touch screen according to an embodiment of the present invention;

3 is a schematic diagram of a position between a Tx bus and a Tx of an LCD touch screen according to an embodiment of the present invention;

4 is a schematic structural diagram of an LCD touch Tx bus according to an embodiment of the present invention;

FIG. 5 is a schematic diagram showing the position of a Tx bus and a shield electrode of an LCD touch screen according to an embodiment of the invention; FIG.

FIG. 6 is a schematic structural diagram of a terminal according to another embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The illustrated embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to make the advantages of the technical solutions of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

The embodiment of the invention is applicable to a capacitive touch screen, and an in-cell In-cell LCD capacitive touch screen is taken as an example. As shown in FIG. 1 , the structure of the embedded LCD capacitive touch screen includes a display area including Rx1. The upper glass substrate 2 with CF, the sealant 3, the Tx4, and the lower glass substrate 5 provided with the TFT, the non-display area includes the IC6 for detecting the change of the touch capacitance, the Rx1 is connected to the driving circuit through the FPC7, and the Tx4 is connected through the FPC8. The driving circuit, as shown in FIG. 2, Rx1 is strip-shaped on the surface of the upper glass substrate 2, each strip of Rx1 needs to be connected to an FPC7, and the lower glass substrate 5 is further provided with a Tx bus 9 for connecting Tx4 to supply a Tx4 signal. The outer layer of the Tx bus 9 is wrapped with an insulator, as shown in FIG. 3, which is a connection relationship between the Tx bus 9 and the Tx4.

An embodiment of the present invention provides a touch control device 10 including a first substrate provided with a color filter and a second substrate provided with a thin film transistor, and the first substrate and the second substrate are sandwiched between a liquid crystal sealed by a sealant; a surface of the first substrate is provided with a receiving electrode, an emitter is disposed on a surface of the second substrate, the emitter is connected to an emitter bus, and the emitter bus is connected An integrated circuit for detecting a signal, wherein the emitter is connected to the driving circuit through a first flexible circuit board, and the receiving electrode is connected to the driving circuit through a second flexible circuit board, and the surface of the emitter bus is provided with a shielding electrode.

Specifically, the shield electrode is a conductor connected to a ground of the first flexible circuit board or the second flexible circuit board. In this way, it is only necessary to provide a conductor on the surface of the emitter bus and connect the conductor to the ground of the nearby circuit, so that a grounded electrode can be formed on the surface of the emitter bus, and the signal emitted by the emitter bus can be shielded from the display area. At the non-display area, the same touch capacitance as the display area cannot be formed. When the human hand touches this area, the change of the capacitance is not caused, thereby avoiding the formation of an erroneous touch effect.

Further, the conductor may be a conductor glass.

The device 10 is described by taking an in-line LCD touch screen as an example. As shown in FIG. 1 , FIG. 2 and FIG. 3 , it is a schematic structural diagram of an LCD. In the embodiment of the present invention, a shield electrode 11 is disposed on a surface of the Tx bus 9 . 4 is shown. Specifically, the shield electrode 11 may be a ground electrode. As shown in FIG. 5, a transparent conductive film such as ITO (Indium Tin Oxide) is disposed on the surface of the Tx bus 9, and the transparent conductive film is grounded; or A transparent conductive film such as ITO (Indium Tin Oxide) is provided on the surface of the Tx bus 9, and the transparent conductive film is connected to the ground of other lines, for example, the ground of the FPC.

It should be noted that the surface of the Tx bus 9 is covered with an insulator, and the shield electrodes shown in FIG. 4 and FIG. 5 are located. The outside of the insulator. In the structure shown in FIG. 4, the shield electrode can also cover all of the Tx bus 9, but since the uncovered bus in FIG. 4 is in the direction of parallel Rx, the capacitance formed is small, and the signal of the capacitance change is negligible. Therefore, the coverage of the shield electrode can be as shown in FIG.

It should be noted that the embodiment of the present invention is applicable not only to the LCD structure shown in FIG. 1 , FIG. 2 , and FIG. 3 , but also to the structure of other capacitive touch screens. For example, on the basis of FIG. 1 , Rx1 The principle is the same as that used for the LCD structure shown in FIG. 1, FIG. 2, and FIG. 3, and is not described here.

Compared with the prior art, the device 10 of the present invention is provided with a first substrate of a color filter and a second substrate provided with a thin film transistor, a liquid crystal is sandwiched between the first substrate and the second substrate, and the frame is sealed a glue seal; a receiving pole is disposed on a surface of the first substrate, an emitter is disposed on a surface of the second substrate, an emitter is connected to the emitter bus, an emitter bus is connected to the integrated circuit for detecting signals, and the emitter passes through the first flexible circuit board The driving circuit is connected, the receiving pole is connected to the driving circuit through the second flexible circuit board, and the surface of the emitter bus is provided with a shielding electrode. In this way, a shield electrode is disposed on the surface of the Tx bus to shield the signal transmitted by the Tx bus, so that the FPC connected to the Rx cannot receive the signal transmitted by the Tx bus, so that the non-display area near the display area, between the Tx bus and the FPC The same touch capacitance as the real area cannot be formed. When the human hand touches this area, it does not cause a change in capacitance, thereby avoiding an erroneous touch effect.

A further embodiment of the present invention provides a touch control terminal 20, as shown in FIG. 6, comprising a device 10, the device 10 comprising a first substrate provided with a color filter and a second substrate provided with a thin film transistor, Liquid crystal is sandwiched between the first substrate and the second substrate, and sealed by a sealant; a receiving electrode is disposed on a surface of the first substrate, and an emitter is disposed on a surface of the second substrate; The emitter is connected to an emitter bus, the emitter bus is connected to an integrated circuit for detecting signals, the emitter is connected to the driving circuit through a first flexible circuit board, and the receiving pole is connected by the second flexible circuit board a driving circuit, the emitter bus surface is provided with a shielding electrode.

Specifically, the shield electrode is a conductor connected to a ground of the first flexible circuit board or the second flexible circuit board. In this way, it is only necessary to provide a conductor on the surface of the emitter bus and connect the conductor to the ground of the nearby circuit, so that a grounded electrode can be formed on the surface of the emitter bus, and the emitter can be shielded. The signal transmitted by the bus, so that the same touch capacitance as the display area cannot be formed at the non-display area close to the display area, when the human hand touches the area, the change of the capacitance is not caused, thereby avoiding the formation of an erroneous touch effect.

Compared with the prior art, the terminal 20 of the present invention includes a device 10, a first substrate provided with a color filter and a second substrate provided with a thin film transistor, and a sandwich between the first substrate and the second substrate Liquid crystal, sealed by a sealant; a receiver is disposed on the surface of the first substrate, an emitter is disposed on the surface of the second substrate, an emitter is connected to the emitter bus, and an emitter bus is connected to the integrated circuit for detecting signals, the emitter The driving circuit is connected through the first flexible circuit board, and the receiving pole is connected to the driving circuit through the second flexible circuit board, and the surface of the emitter bus is provided with a shielding electrode. In this way, a shield electrode is disposed on the surface of the Tx bus to shield the signal transmitted by the Tx bus, so that the FPC connected to the Rx cannot receive the signal transmitted by the Tx bus, so that the non-display area near the display area, between the Tx bus and the FPC The same touch capacitance as the real area cannot be formed. When the human hand touches this area, it does not cause a change in capacitance, thereby avoiding an erroneous touch effect.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. All should be covered by the scope of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

A touch control device, comprising: a first substrate provided with a color filter and a second substrate provided with a thin film transistor, wherein a liquid crystal is sandwiched between the first substrate and the second substrate, and Sealed by a sealant; a surface of the first substrate is provided with a receiving electrode, an emitter is disposed on a surface of the second substrate, the emitter is connected to an emitter bus, and the emitter bus is connected for detecting An integrated circuit of signals, wherein the emitter is connected to the driving circuit through a first flexible circuit board, and the receiving electrode is connected to the driving circuit through a second flexible circuit board, and the surface of the emitter bus is provided with a shielding electrode.
The device according to claim 1, wherein said shield electrode is a conductor connected to a ground of said first flexible circuit board or said second flexible circuit board.
The device of claim 2 wherein said conductor is indium tin oxide ITO.
A touch control terminal, comprising: a touch control device, the touch control device comprising a first substrate provided with a color filter and a second substrate provided with a thin film transistor, the first substrate and Liquid crystal is sandwiched between the second substrate and sealed by a sealant; a receiving electrode is disposed on a surface of the first substrate, and an emitter is disposed on a surface of the second substrate, and the emitter is connected and emitted a pole bus, the emitter bus is connected to an integrated circuit for detecting signals, the emitter is connected to the driving circuit through a first flexible circuit board, and the receiving pole is connected to the driving circuit through a second flexible circuit board, the transmitting The pole bus surface is provided with a shield electrode.
The terminal according to claim 4, wherein the shield electrode is a conductor connected to a ground of the first flexible circuit board or the second flexible circuit board.
The terminal according to claim 5, wherein the conductor is indium tin oxide ITO.