CN202502486U

CN202502486U - Capacitive touch screen

Info

Publication number: CN202502486U
Application number: CN2012200171054U
Authority: CN
Inventors: 唐根初
Original assignee: Suzhou OFilm Tech Co Ltd
Current assignee: Anhui Jingzhuo Optical Display Technology Co Ltd
Priority date: 2012-01-16
Filing date: 2012-01-16
Publication date: 2012-10-24
Anticipated expiration: 2022-01-16

Abstract

The utility model discloses a capacitive touch screen, wherein the experience effect is good and can be adjusted depending on requirements, and the anti-interference capability is strong. The capacitive touch screen comprises a glass panel and a capacitance inductive layer; the upper surface of the capacitance inductive layer is a capacitance induction unit; the lower surface of the capacitance inductive layer is an electrochromic unit; and the electrochromic unit comprises a first transparent conductive film, an electrochromic film, an ion conductive film, an ion storage film, a second transparent conductive film and a protection film in sequence from up to down.

Description

A kind of capacitive touch screen

Technical field

The utility model relates to a kind of capacitive touch screen.

Background technology

Touch-screen is a kind of remarkable input equipment that improves man machine operation interface, have intuitively, simply, advantage efficiently.Touch-screen has obtained to use widely in many electronic products, such as mobile phone, PDA (personal digital assistant), multimedia, public information inquiry system etc.Touch-screen mainly contains following four types, comprises resistance-type, condenser type, infrared and surface acoustic wave type touch-screen.Fig. 1 is traditional capacitive touch screen, comprises face glass 3 and capacitive sensing unit 41.In fact, capacitive touch screen also comprises the chip for driving of controlling touch-screen and the FPC that connects touch-screen and chip for driving, and is not shown among these Fig. 1.

Past, because structure and the restriction that drives cost, and many-sided shortcoming such as touch-control distortion, the utilization scope of capacitive touch screen is very narrow, and transmitance can not be adjusted, the experience weak effect of touch-screen, and the poor anti jamming capability of touch-screen.

Summary of the invention

The technical matters that the utility model will solve provides the capacitive touch screen that a kind of transmitance can be adjusted as required, experience is effective, antijamming capability is strong.

The technical scheme that addresses the above problem is: this capacitive touch screen; Comprise face glass and capacitive sensing layer; The upper surface of capacitive sensing layer is the capacitive sensing unit; The lower surface of capacitive sensing layer is an electrochromic cells, and electrochromic cells comprises first transparent conductive film, electrochomeric films, ion-conductive film, ion storage film, second transparent conductive film and protective film from top to bottom successively.

Control through voltage can change in the adjustment ion storage film ion motion and with electrochomeric films in composition generation electrochemical oxidation and reduction reaction; Cause that its transmitance changes; Make touch-screen can adjust appearance as required; This effect will be different from the adjusting that shows module brightness, can promote the user experience effect of touch-screen greatly.And the electrochromic cells of touch-screen be positioned at the capacitive sensing unit below; When this touch-screen is used for electronic product; Transparent conductive film in its electrochromic cells can shield from the demonstration module undesired signal below the touch-screen; Therefore, this touch-screen has antijamming capability with respect to traditional capacitive touch screen.

Description of drawings

Fig. 1 is the structural representation of traditional capacitive touch screen;

Fig. 2 is the structural representation according to the capacitive touch screen of the utility model;

Fig. 3 is the diagrammatic cross-section according to the face glass of the utility model;

Fig. 4 is according to the electrochromic cells of the utility model synoptic diagram in the transmitance of colored state and bleached state.

Specific embodiments

As shown in Figure 2; This capacitive touch screen; Comprise face glass 3 and capacitive sensing layer 4; The upper surface of capacitive sensing layer is capacitive sensing unit 41, and the lower surface of capacitive sensing layer is an electrochromic cells 43, and electrochromic cells comprises first transparent conductive film 431, electrochomeric films 432, ion-conductive film 433, ion storage film 434, second transparent conductive film 435 and protective film 436 from top to bottom successively.When finger contact touch-screen, form new capacitive coupling between the capacitive sensing unit 41 of touch-screen and the finger, this changes in capacitance can be judged touch location, realizes touch function.First transparent conductive film 431 and second transparent conductive film 435 are as the electrode effect, connect the two poles of the earth of power supply respectively.When on first transparent conductive film 431, adding negative voltage, the ion in the ion storage film 434 will pass ion-conductive film 433 to this electrode direction motion; Electrochemical reaction takes place with electrochomeric films 432; Realize paintedly, be in coloured state, its transmitance reduces; When on first transparent conductive film 431, adding positive voltage, the ion that electrochemical reaction takes place with electrochomeric films 432 will reduce to motion in the other direction, realizes fading, and is in the attitude of fading, and its transmitance raises.Its transmitance is as shown in Figure 4 with the synoptic diagram of the attitude of fading at coloured state.And, can be according to the needs of reality, through the adjusting of voltage, transmitance can freely be controlled in range format.This kind effect, the experience effect of enhancing touch-screen does not possess this function in the touch-screen in the past.Preferably the protective film in the electrochromic cells 43 436 is a sull, and it can protect second transparent conductive film 435, avoids the destruction of second transparent conductive film 435.When this touch-screen applies to electronic product; First, second transparent conductive film is between capacitive sensing unit 41 and demonstration module; It can shield the undesired signal that shows module, avoids the capacitive sensing unit to receive the interference that shows module, has improved the antijamming capability of touch-screen.

Preferably, as shown in Figure 3, face glass is a chemically toughened glass 31, is provided with ink lay 32 at the lower surface of chemically toughened glass, and the thickness of face glass is 0.55～1.5mm.

Preferably, as shown in Figure 1, the middle part of capacitive sensing layer is a glassy layer 42, and the thickness of glassy layer is 0.2～0.55mm.

Preferably, the capacitive sensing unit comprises continuous transparent conductive film layer and conductive film circuit (not shown).

The above; It only is the preferred embodiment of the utility model; Be not that the utility model is done any pro forma restriction; Every technical spirit according to the utility model all still belongs to the protection domain of the utility model technical scheme to any simple modification, equivalent variations and modification that above embodiment did.

Claims

1. capacitive touch screen; Comprise face glass (3) and capacitive sensing layer (4); The upper surface of capacitive sensing layer is capacitive sensing unit (41); It is characterized in that: the lower surface of capacitive sensing layer is electrochromic cells (43), and electrochromic cells comprises first transparent conductive film (431), electrochomeric films (432), ion-conductive film (433), ion storage film (434), second transparent conductive film (435) and protective film (436) from top to bottom successively.

2. capacitive touch screen according to claim 1 is characterized in that: face glass is chemically toughened glass (31), is provided with ink lay (32) at the lower surface of chemically toughened glass, and the thickness of face glass is 0.55～1.5mm.

3. capacitive touch screen according to claim 1 is characterized in that: the middle part of capacitive sensing layer is glassy layer (42), and the thickness of glassy layer is 0.2～0.55mm.

4. capacitive touch screen according to claim 1 is characterized in that: the capacitive sensing unit comprises continuous transparent conductive film layer and conductive film circuit.