CN214202340U

CN214202340U - Three-layer stacked touch screen

Info

Publication number: CN214202340U
Application number: CN202120266542.9U
Authority: CN
Inventors: 刘方
Original assignee: Hangzhou Fannal Electronics Co ltd
Current assignee: Hangzhou Fannal Electronics Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-09-14
Anticipated expiration: 2031-02-01

Abstract

The utility model relates to the technical field of touch screens, in particular to a three-layer stacked touch screen which comprises a protective glass layer, a sensing glass layer I and a sensing glass layer II from top to bottom in sequence, the sensing glass layer I comprises a first conductive film layer and a first glass layer, the first conductive film layer is covered on one side surface of the first glass layer facing the protective glass layer, the sensing glass layer II comprises a conductive film layer II, a glass layer II and a conductive film layer III, the conductive film layer II and the conductive film layer III are respectively covered on two side surfaces of the glass layer II, and the second conductive film layer is attached to one side surface of the first glass layer far away from the protective glass layer, preset touch screen circuit patterns are etched on the first conductive film layer, the second conductive film layer and the third conductive film layer, and the touch-sensitive screen circuit pattern between electrically conductive rete one and the electrically conductive rete two corresponds the setting each other, the utility model discloses still possess high accuracy and high sensitivity under the high interference.

Description

Three-layer stacked touch screen

Technical Field

The utility model relates to a touch-sensitive screen technical field, specific field is a three-layer superposed touch-sensitive screen.

Background

In the highly intelligent today, touch panels have already been popularized in the lives of people, no matter in the consumption field (daily life) or in the industrial field, in the era of industrial automation, the traditional manufacturing has been replaced by mechanical equipment, and how to effectively, quickly and accurately control the mechanical equipment becomes a trouble. The original resistance touch panel gradually exits from the stage due to the larger disadvantage, and the birth of the capacitance touch screen overturns the whole touch field, so that the high precision, the high touch sensitivity and the display effect cannot be replaced for the moment; in the industrial control field, it is a difficult problem to solve high anti-interference performance and high environmental requirements, which also brings new challenges and opportunities to the capacitive touch panel structure.

The consumption field, the nearly capacitive touch screen that uses today has simple structure relatively because of capacitive touch screen, and a plurality of touch points of discernment that can be quick are counted to can realize reducing the consumption, use multiple bonding material simultaneously can let the demonstration of display more superior, reach the optical effect of best quality as far as. The operation interface in the industrial field is mostly a resistance touch screen or does not have a touch function in the early stage, and the resistance touch screen can achieve a touch effect only by pressing with fingers or heavy objects, so that the resistance touch screen is not used under the condition of non-human body contact or multifunction, and the service life of the pressing type is one of the defects. Because the capacitive touch screen inputs a capacitance to the sensor through the touch between fingers, the sensor reports the position of the capacitance to the control IC and feeds back the position, and therefore the touch detection effect is achieved.

The equipment in the industrial control field needs to be capable of achieving functions under various severe environmental conditions, such as outdoor equipment in the marine field, high solar radiation, salt fog invasion and possibly needing to achieve functions under the condition that rainwater exists on the surface of the touch panel. In certain specific applications, it is desirable to meet stringent reliability requirements, as well as shielding against electromagnetic interference. Therefore, the capacitive touch screen which is strong in anti-interference and meets the high-reliability test requirement is designed.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a three-layer superposed touch screen.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a three-layer stacked touch screen, is protection glass layer, sensing glass layer one, sensing glass layer two from top to bottom in proper order, sensing glass layer one includes electrically conductive rete one and glass layer one, and electrically conductive rete one covers and sets up on the side of glass layer one towards the protection glass layer, sensing glass layer two includes electrically conductive rete two, glass layer two and electrically conductive rete three, and electrically conductive rete two covers the setting respectively on the both sides face of glass layer two with electrically conductive rete three, and electrically conductive rete two and glass layer one keep away from a side laminating of protection glass layer, electrically conductive rete one, electrically conductive rete two and electrically conductive rete three on all the etching be provided with predetermined touch screen circuit pattern, and electrically conductive rete one and electrically conductive rete two on the touch screen circuit pattern between correspond the setting each other.

Preferably, the mutual corresponding alignment difference of the touch screen circuit patterns on the first conductive film layer and the second conductive film layer is within +/-0.2 mm.

Preferably, the protective glass layer, the first glass layer and the second glass layer are all high-light-transmission glass.

Preferably, the high light-transmitting glass is tempered glass.

Preferably, the first conductive film layer, the second conductive film layer and the third conductive film layer are all covered with insulating oil.

Compared with the prior art, the beneficial effects of the utility model are that: still possess high accuracy and high sensitivity's demonstration touch-control module under high interference, with capacitive touch screen's response layer, drive layer and ESD layer separate, with the drive layer as for the upper strata of single face ITO glass, response layer and ESD level are in the upper and lower layer of two-sided ITO glass, and connect its three-layer communication with two winding displacement, both guaranteed the timely feedback of touch-control for conventional capacitive touch screen, fine increase the shielding layer again, avoid the electromagnetic interference that many electronic unit in terminal caused, outside being independent of the sensor with ESD, moreover, the steam generator is simple in structure, the winding displacement design is easy, make things convenient for the processing procedure.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a protective glass layer; 2. a first sensing glass layer; 3. a second sensing glass layer; 4. a first conductive film layer; 5. a first glass layer; 6. a second conductive film layer; 7. a second glass layer; 8. and a third conductive film layer.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a three-layer stacked touch screen, is protection glass layer, sensing glass layer one, sensing glass layer two from top to bottom in proper order, sensing glass layer one includes electrically conductive rete one and glass layer one, and electrically conductive rete one covers and sets up on the side of glass layer one towards the protection glass layer, sensing glass layer two includes electrically conductive rete two, glass layer two and electrically conductive rete three, and electrically conductive rete two covers the setting respectively on the both sides face of glass layer two with electrically conductive rete three, and electrically conductive rete two and glass layer one keep away from a side laminating of protection glass layer, electrically conductive rete one, electrically conductive rete two and electrically conductive rete three on all the etching be provided with predetermined touch screen circuit pattern, and electrically conductive rete one and electrically conductive rete two on the touch screen circuit pattern between correspond the setting each other.

And the mutual corresponding alignment difference of the touch screen circuit patterns on the first conductive film layer and the second conductive film layer is within +/-0.2 mm.

The protective glass layer, the first glass layer and the second glass layer are all high-light-transmission glass.

The high-light-transmittance glass is tempered glass.

And the first conductive film layer, the second conductive film layer and the third conductive film layer are all covered with insulating oil.

Through the technical scheme, the manufacturing steps are as follows:

step 1: a layer of transparent conductive film (ITO) is covered on the glass with the set thickness by adopting a vacuum magnetron sputtering process mode, so that the optical characteristics of the glass are ensured;

step 2: chemically etching the ITO glass by using photoresist, baking, laser and covering insulating oil;

and step 3: chemically etching single-sided ITO glass to form a touch driving layer, wherein the front side of the double-sided ITO glass is etched to form the touch driving layer, and the back side of the double-sided ITO glass is etched to form an ESD layer;

and 4, step 4: binding two pieces of ITO glass and two pieces of FPC (flexible printed circuit) which are processed by using binding ACF glue respectively, wherein the processed single-sided ITO glass is named as FOG1, and the double-sided ITO glass is named as FOG 2;

and 5: optically laminating FOG1 and FOG2 using OCR;

the alignment difference of the ITO etching patterns of the optical bonding FOG1 and FOG2 is within +/-0.2 mm;

step 6: tempered glass on the upper layer of the sensor, required colors on silk screen printing and required surface treatment (AR and AF) on plating;

and 7: in the same step 1-5, optically bonding the tempered glass and the FOG;

and 8: fixing the buckled clamping grooves of the double FPCs of the touch screen module after the touch screen module is attached to ensure that the two FOGs are in communication connection;

and step 9: and finishing the assembly of the touch screen, performing functional test, confirming the touch effect and confirming the normal ESD function.

According to the capacitive touch screen, the sensing layer, the driving layer and the ESD layer of the capacitive touch screen are separated, the driving layer is arranged on the upper layer of the single-sided ITO glass, the sensing layer and the ESD layer are arranged on the upper layer and the lower layer of the double-sided ITO glass, and the sensing layer and the ESD layer are in communication connection through the double flat cables, so that compared with the conventional capacitive touch screen, timely feedback of touch control is guaranteed, the shielding layer is well added, electromagnetic interference caused by multiple electronic units of a terminal is avoided, the ESD is independent from the sensor, the structure is simple, the flat cable design is easy, and the manufacturing process is convenient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a three-layer stacked touch-sensitive screen which characterized in that: be protection glass layer, sensing glass layer one, sensing glass layer two from top to bottom in proper order, sensing glass layer one includes electrically conductive rete one and glass layer one, and electrically conductive rete one covers the setting on the side of glass layer one towards the protection glass layer, sensing glass layer two includes electrically conductive rete two, glass layer two and electrically conductive rete three, and electrically conductive rete two covers the setting respectively on the both sides face of glass layer two with electrically conductive rete three, and electrically conductive rete two and glass layer one keep away from a side laminating on protection glass layer, electrically conductive rete one, electrically conductive rete two and electrically conductive rete three on all the etching be provided with predetermined touch-sensitive screen circuit pattern, and electrically conductive rete one and electrically conductive rete two on the touch-sensitive screen circuit pattern of going up correspond the setting each other.

2. A three-layer-stack touch screen according to claim 1, wherein: and the mutual corresponding alignment difference of the touch screen circuit patterns on the first conductive film layer and the second conductive film layer is within +/-0.2 mm.

3. A three-layer-stack touch screen according to claim 1, wherein: the protective glass layer, the first glass layer and the second glass layer are all high-light-transmission glass.

4. A three-layer-stack touch screen according to claim 3, wherein: the high-light-transmittance glass is tempered glass.

5. A three-layer-stack touch screen according to claim 1, wherein: and the first conductive film layer, the second conductive film layer and the third conductive film layer are all covered with insulating oil.