CN210864678U

CN210864678U - Capacitive touch screen

Info

Publication number: CN210864678U
Application number: CN201921977099.5U
Authority: CN
Inventors: 李涛
Original assignee: Yancheng Mudong Photoelectric Technology Co ltd
Current assignee: Mutto Optronics Corp
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-06-26
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a capacitive touch screen, which comprises a cover plate glass (1), a first conductive film (2) and a second conductive film (4), wherein a driving wire for providing a driving signal is arranged on the first conductive film (2), and a detecting wire for providing a capacitive coupling signal is arranged on the second conductive film (4); the first conductive film (2) is arranged on the cover plate glass (1), the first conductive film (2) and the second conductive film (4) are combined to form a touch sensor, and the touch sensor is electrically connected with a touch chip. The utility model provides a capacitive touch screen adopts first conductive film and second conductive film laminated structure, and lays first conductive film on cover plate glass, has reduced the thickness of display screen, has improved the sensitivity of touch-sensitive screen. And the light transmittance of the touch screen is improved by combining the cover plate glass structure.

Description

Capacitive touch screen

Technical Field

The utility model relates to a capacitive touch screen.

Background

Touch screens have become the standard configuration for mobile phones and tablet computers. As a man-machine interaction mode which can provide simplicity, convenience and nature, the touch screen is mainly applied to electronic consumer goods, public information terminals, industrial control, multimedia teaching and the like, and the market thereof is continuously growing. Currently, a common touch screen in the market is a capacitive touch screen.

The capacitive touch screen is formed by sticking a layer of transparent special metal conductive substance on the surface of glass. When a finger touches the metal layer, the capacitance of the contact point changes, so that the frequency of an oscillator connected with the contact point changes, and the touch position can be determined by measuring the frequency change to obtain information.

At present, a capacitive touch screen is mainly of a double-layer film type touch technology (GFF) structure, and the double-layer film type touch technology (GFF) uses OCA optical cement to paste a conductive coating X axis + PET film and a conductive coating Y axis + PET film layer by layer, so that an air layer between structures is fully compressed. In the technical field, a double-layer thin film touch control (GFF) technology has a low equipment cost, a mature production technology and a highest yield, so that many touch screens use a GFF structure, but the GFF structure has the following problems in the touch screen:

1) the thickness is thick;

2) and a large amount of OCA is used for laminating, so that the cost is increased.

SUMMERY OF THE UTILITY MODEL

For solving the problem that exists among the prior art, the utility model aims to provide a thickness is thin, has the capacitive touch screen of better luminousness and sensitivity here.

In order to achieve the purpose of the present invention, the capacitive touch screen provided herein includes a cover glass, a first conductive film and a second conductive film, wherein a driving line for providing a driving signal is disposed on the first conductive film, and a detecting line for providing a capacitive coupling signal is disposed on the second conductive film; the first conducting film is arranged on the cover plate glass, the first conducting film and the second conducting film are combined to form a touch sensor, and the touch sensor is electrically connected with the touch chip.

Furthermore, the second conductive film is arranged on the OCA, and the OCA is attached to the first conductive film. Lay the second conductive film on the OCA to laminate on first conductive film, further reduced the thickness of display screen, make the utility model provides a touch-sensitive screen is more frivolous.

Furthermore, the touch sensor and the touch chip are electrically connected through a flexible printed circuit board. The flexible printed circuit board is connected with the touch sensor and the touch chip, so that the bending performance of the touch screen is improved.

Furthermore, the cover plate glass, the first conductive film and the second conductive film form a touch panel, and the touch panel is attached to the LCD.

Furthermore, the touch panel is attached to the LCD through the OCA.

The beneficial effects of the utility model include:

1. adopt first conductive film and second conductive film laminated structure, and lay first conductive film on the glass cover plate, reduced the thickness of display screen, improved the sensitivity of touch-sensitive screen. And the light transmittance of the touch screen is improved by combining the cover plate glass structure.

2. OCA (optically clear adhesive) is reduced, the thickness of the touch screen is thinner, the sensitivity is higher, and the user experience is better;

3. the touch screen has the advantages that the glass cover plate is combined with the OCA glue, so that the touch screen has low thickness and high light transmittance.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

fig. 1 is a schematic structural diagram of a touch screen provided by the present invention;

in the figure: 1-cover glass, 2-first conductive film, 3-OCA, 4-second conductive film, 5-LCD.

Detailed Description

The claimed invention will now be described in further detail with reference to the accompanying drawings and examples.

The technical scheme that the utility model claims is a capacitive touch screen, this touch screen includes cover plate glass 1, first conducting film 2 and second conducting film 4, lay the drive line used for providing the drive signal on the first conducting film 2, lay the detection line used for providing the capacitive coupling signal on the second conducting film 4; the first conductive film 2 is arranged on the cover plate glass 1, the first conductive film 2 and the second conductive film 4 are combined to enable the driving wire to be in contact with the detection wire, a capacitance node is formed at the contact intersection of the driving wire and the detection wire to form a touch sensor, and the touch sensor is electrically connected with the touch chip to achieve touch operation.

Any one of the first conductive film 2 and the second conductive film 4 may be used, and an indium tin oxide semiconductor transparent conductive film (ITO film) is used here. The first conductive film 2 is arranged on the cover plate glass through a magnetron sputtering process.

The touch sensor and the touch chip are electrically connected through the flexible printed circuit board, and certainly, the touch sensor and the touch chip can also be electrically connected through a conducting wire.

The utility model provides a cover plate glass 1, first conductive film 2 and second conductive film 4 among the touch-sensitive screen constitute touch panel, and this touch panel and LCD laminating realize electrical connection through flexible circuit board or wire between the two.

Here, the first conductive film 2 and the second conductive film 4, and the touch panel and the LCD are bonded to each other by the OCA3, but may be bonded to each other in any other manner.

Here, the second conductive layer 4 can be directly disposed on the OCA3, and the OCA3 is directly attached to the cover glass 1, so that the first conductive layer 2 and the second conductive layer 4 are attached to each other, the driving line disposed on the first conductive layer 2 is contacted with the sensing line disposed on the second conductive layer 4, and a capacitive node is formed at a contact intersection of the driving line and the sensing line, thereby forming the touch sensor.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

Claims

1. A capacitive touch screen, characterized by: the touch screen comprises cover plate glass (1), a first conductive film (2) and a second conductive film (4), wherein a driving wire for providing a driving signal is distributed on the first conductive film (2), and a detection wire for providing a capacitive coupling signal is distributed on the second conductive film (4); the first conductive film (2) is arranged on the cover plate glass (1), the first conductive film (2) and the second conductive film (4) are combined to form a touch sensor, and the touch sensor is electrically connected with a touch chip.

2. A capacitive touch screen according to claim 1, wherein: the second conductive film (4) is arranged on the OCA (3), and the OCA (3) is attached to the first conductive film (2).

3. A capacitive touch screen according to claim 1 or 2, wherein: and the touch sensor is electrically connected with the touch chip through a flexible printed circuit board.

4. A capacitive touch screen according to claim 1 or 2, wherein: the cover plate glass (1), the first conductive film (2) and the second conductive film (4) form a touch panel, and the touch panel is attached to the LCD.

5. A capacitive touch screen according to claim 4, wherein: the touch panel is attached to the LCD through an OCA (3).

6. A capacitive touch screen according to claim 1 or 2, wherein: the first conductive film (2) is an indium tin oxide semiconductor transparent conductive film.

7. A capacitive touch screen according to claim 1 or 2, wherein: the second conductive film (4) is an indium tin oxide semiconductor transparent conductive film.