CN107589865A - Touch-screen and terminal - Google Patents

Abstract

The invention discloses a touch screen, which includes a touch panel, a display panel opposite to the touch panel, and an adhesive layer connected between the touch panel and the display panel. The gap, the touch screen also includes an anti-fog film located between the touch panel and the display panel, the orthographic projection of the anti-fog film on the display panel covers the orthographic projection of the gap on the display panel, so as to prevent fogging inside the gap. The aforementioned touch screen is able to avoid internal fogging. The invention also discloses a terminal.

Description

Touch screen and terminal

technical field

The present invention relates to the technical field of electronic equipment, in particular to a touch screen and a terminal.

Background technique

With the continuous deepening of automobile electrification, intelligence and interconnection trends, the development and growth of the car touch display market has been indirectly driven, and it is widely used in car interiors such as dashboards, central control displays, and rear seat entertainment systems. Touch display is about to usher in a huge market increase.

Vehicle touch screens are becoming more and more similar to consumer electronics, but the harsher environment of automobiles is unmatched by consumer electronics. Therefore, both design and material selection must withstand the test of safety. It can also be said that the biggest difference between automobiles and consumer electronics products is the consideration of safety. The traditional touch screen will form an air layer between the touch layer and the display layer. When a car equipped with a traditional touch screen is driven in some extreme weather with sudden temperature changes, the water vapor in the air layer will liquefy on the surface of the cold object to form small water droplets and condense. Fog will affect the vision of car owners, thus causing great hidden dangers to driving safety.

Contents of the invention

The technical problem to be solved by the present invention is to provide a touch screen and terminal capable of avoiding internal fogging.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

In one aspect, a touch screen is provided, including a touch panel, a display panel opposite to the touch panel, and an adhesive layer connected between the touch panel and the display panel, the adhesive layer is ring-shaped to A gap is formed between the touch panel and the display panel, and the touch screen further includes an anti-fog film between the touch panel and the display panel, and the front side of the anti-fog film on the display panel is The projection overlays the orthographic projection of the gap on the display panel to prevent fogging inside the gap.

Since the anti-fog film is arranged between the touch panel and the display panel of the touch screen, and the anti-fog film is in contact with the air in the gap, when the touch screen is subjected to sudden changes in temperature or hot and cold Under alternate extreme weather conditions, the water vapor in the air in the gap will quickly and evenly spread on the anti-fog film and form a very thin water film, which will not scatter the incident light function, thereby avoiding the fogging phenomenon caused by the condensation of water vapor into water droplets, and the display image quality of the display panel can be guaranteed. In short, the touch screen can avoid internal fogging, thereby improving the visual display effect.

Wherein, the display panel has a display area and a non-display area arranged around the display area, the orthographic projection of the adhesive layer on the display panel is located in the non-display area, and the anti-fog film is located in the non-display area. The orthographic projection on the display panel covers the display area.

The adhesive layer will not block the light emitted from the display area, and the light emitted by the display area passes through the gap and then the touch screen in order to be emitted, so that the touch screen can display images. Since the orthographic projection of the anti-fog film on the display panel covers the display area, the water film formed on the anti-fog film can completely cover the display area, and the light emitted by the display area Through the water film, the display effect of the touch screen is more balanced and the display effect is better.

Wherein, the anti-fog film is attached on the surface of the touch panel facing the display panel. Because the flatness of the surface of the touch panel facing the display panel is relatively high, the touch panel will not interfere with the rollers of the cage machine and the attaching machine, and the attaching difficulty of the anti-fog film is low. The operation feasibility is high, and the production line operation is convenient and the operation yield rate is improved.

Wherein, the anti-fog film covers the touch panel, and the adhesive layer is connected between the anti-fog film and the display panel. Since the adhesive layer is completely bonded to the anti-fog film, it has high flatness and low bonding difficulty.

Wherein, the front projection of the anti-fog film on the display panel covers part of the non-display area, and the adhesive layer bonds the touch panel, the anti-fog film and the display panel, which is beneficial to increase The firmness of the display panel.

Wherein, the anti-fog film includes a laminated transparent optical adhesive layer, a base material and a hydrophilic coating, and the transparent optical adhesive layer is connected to the touch panel. The hydrophilic group of the hydrophilic coating will grab water molecules, reduce the surface tension of water and the water contact angle of the contact interface, so that the water molecules will be evenly spread on the contact surface and form a layer of water before water droplets are formed. Film, this layer of water film will not scatter the incident light, thus reducing the scattering of light.

Wherein, the anti-fog film is attached on the surface of the display panel facing the touch panel. There is no gap between the anti-fog film and the display panel.

Wherein, the number of the anti-fog film is two, and the two anti-fog films are respectively attached to the surface of the touch panel facing the display panel and the surface of the display panel facing the touch panel superior. The arrangement of the double-layer anti-fog film can make the water vapor in the air in the gap spread on the anti-fog film faster, so as to further reduce the risk of fogging of the display panel.

Wherein, the anti-fog film overlaps with the adhesive layer. At this time, there is no gap between the side of the anti-fog film and the side of the adhesive layer, which can further improve the anti-fog effect in the window area of the touch panel.

In another aspect, a terminal is also provided, including the above touch screen. The terminal can avoid internal fogging, thereby improving the visual display effect.

Description of drawings

In order to illustrate the technical solution of the present invention more clearly, the accompanying drawings used in the implementation will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some implementations of the present invention. As far as technical personnel are concerned, other drawings can also be obtained like these drawings without paying creative work.

FIG. 1 is a schematic structural diagram of an implementation manner of a touch screen provided by an embodiment of the present invention.

FIG. 2 is an exploded view of the touch screen shown in FIG. 1 .

Fig. 3 is a schematic structural diagram of another implementation manner of a touch screen provided by an embodiment of the present invention.

FIG. 4 is a schematic structural diagram of yet another implementation manner of a touch screen provided by an embodiment of the present invention.

FIG. 5 is an exploded view of the touch screen shown in FIG. 4 .

FIG. 6 is a schematic structural diagram of another implementation manner of a touch screen provided by an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of still another implementation manner of the touch screen provided by the embodiment of the present invention.

FIG. 8 is a schematic structural view of the anti-fog film of the touch screen provided by the embodiment of the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In addition, the following descriptions of the various embodiments refer to the attached drawings to illustrate specific embodiments in which the present invention can be implemented. The directional terms mentioned in the present invention, for example, "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "side", etc., only is to refer to the direction of the attached drawings. Therefore, the direction terms used are for better and more clearly explaining and understanding the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific orientation construction and operation, therefore, should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", "connection", and "set on..." should be understood in a broad sense, for example, it can be A fixed connection can also be a detachable connection or an integral connection; it can be a mechanical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be an internal communication between two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more. If the term "process" appears in this specification, it not only refers to an independent process, but also includes in this term as long as it can realize the expected function of the process when it cannot be clearly distinguished from other processes. In addition, the numerical range represented by "-" in this specification means the range which includes the numerical value described before and after "-" as a minimum value and a maximum value, respectively. In the drawings, units with similar or identical structures are denoted by the same reference numerals.

An embodiment of the present invention provides a terminal. The terminals include, but are not limited to, vehicle-mounted computers, mobile phones, notebooks, tablet computers, POS machines, cameras, and the like.

Please refer to FIG. 1 to FIG. 7 together, the terminal includes a touch screen 100 . The touch screen 100 includes a touch panel 1 , a display panel 2 opposite to the touch panel 1 , and an adhesive layer 3 connected between the touch panel 1 and the display panel 2 . The adhesive layer 3 is ring-shaped to form a gap 30 between the touch panel 1 and the display panel 2 . The gap 30 is a space surrounded by the adhesive layer 3 . The gap 30 is filled with air to form an air layer. The touch screen 100 further includes an anti-fog film 4 located between the touch panel 1 and the display panel 2 . The anti-fog film 4 contacts the air in the gap 30 . The orthographic projection of the anti-fog film 4 on the display panel 2 covers the orthographic projection of the gap 30 on the display panel 2 to prevent fogging inside the gap 30 .

In this embodiment, since the anti-fog film 4 is provided between the touch panel 1 and the display panel 2, and the anti-fog film 4 contacts the air in the gap 30, when the touch screen 100 is in In some extreme weather conditions with sudden changes in temperature or alternation of cold and heat, the water vapor in the air in the gap 30 will quickly and evenly spread on the anti-fog film 4 and form a very thin water film. The water film does not scatter the incident light, thus avoiding the fogging phenomenon caused by condensation of water vapor into water droplets, and the quality of the display image of the display panel 2 can be guaranteed. In short, the touch screen 100 and the terminal can avoid internal fogging, thereby improving the visual display effect.

It can be understood that when the touch screen 100 and the terminal described in this embodiment are used as vehicle-mounted products, since the touch screen 100 and the terminal can avoid internal fogging, on the one hand, the visual experience of the car owner can be guaranteed; Avoid causing dangerous hidden dangers to driving due to blurred display screens.

Please refer to FIG. 1 to FIG. 8 together. As an optional embodiment, the display panel 2 has a display area 21 and a non-display area 22 arranged around the display area 21 . The display area 21 emits light for image display. The orthographic projection of the adhesive layer 3 on the display panel 2 is located in the non-display area 22 . At this time, the adhesive layer 3 will not block the light emitted from the display area 21, and the light emitted by the display area 21 passes through the gap 30 and the touch screen 100 in sequence, and then is emitted, so that the touch screen 100 can perform The screen is displayed. The orthographic projection of the anti-fog film 4 on the display panel 2 covers the display area 21 . At this time, the water film formed on the anti-fog film 4 can completely cover the display area 21, and the light emitted by the display area 21 all passes through the water film, so that the display effect of the touch screen 100 is better. Balanced, the display effect is better.

Optionally, the adhesive layer 3 may use foam glue. The display panel 2 can be a liquid crystal display panel 2 or an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display panel 2 .

In one embodiment, please refer to FIG. 1 to FIG. 3 and FIG. 8 , the anti-fog film 4 is attached on the surface of the touch panel 1 facing the display panel 2 . Since the flatness of the surface of the touch panel 1 towards the display panel 2 is relatively high, the touch panel 1 will not interfere with the rollers of the cage machine and the attachment machine, and the attachment of the anti-fog film 4 The difficulty is low, the feasibility of batch operation is high, and it is convenient for production line operation and improves the operation yield.

Optionally, as shown in FIG. 1 and FIG. 2 , the anti-fog film 4 covers the touch panel 1 . The adhesive layer 3 is connected between the anti-fog film 4 and the display panel 2 . At this time, the anti-fog film 4 covers the entire surface of the touch panel 1 . Since the adhesive layer 3 is completely bonded to the anti-fog film 4 , it has high flatness and low bonding difficulty.

Optionally, as shown in FIG. 3 , the front projection of the anti-fog film 4 on the display panel 2 covers part of the non-display area 22 . At this time, the anti-fog film 4 covers part of the touch panel 1 . The adhesive layer 3 adheres the touch panel 1 , the anti-fog film 4 and the display panel 2 , which is beneficial to increase the firmness of the display panel 2 . A stepped surface is formed between the area where the adhesive layer 3 is bonded to the anti-fog film 4 and the area where the touch panel 1 is bonded.

Optionally, as shown in FIG. 8 , the anti-fog film 4 includes a layer of optically clear adhesive (Optically Clear Adhesive, OCA) 41 , a substrate 42 and a hydrophilic coating 43 that are stacked. The transparent optical adhesive layer 41 is connected between the substrate 42 and the touch panel 1 . The hydrophilic coating 43 contacts the air in the gap 30 . The hydrophilic coating 43 can change the hydrophilic and hydrophobic states of the substrate 42 . The hydrophilic coating 43 is made of hydrophilic acrylic resin polymer material. The hydrophilic group of the hydrophilic coating 43 can grab water molecules, reduce the surface tension of water and the water contact angle of the contact interface, so that the water molecules can be evenly dispersed on the contact surface and form a layer before water droplets are formed. Water film, this layer of water film will not scatter the incident light, thereby reducing the scattering of light. The substrate 42 may be made of polyethylene terephthalate (PET) or triacetate (TAC). The transparent optical adhesive material of the transparent optical adhesive layer 41 is a solid pressure-sensitive adhesive, which has high transmittance and low water absorption, and its main component is acrylic ester.

Optionally, the water contact angle of the anti-fog film 4 is less than or equal to 10°, so that when the display panel is applied to a vehicle display screen, it can ensure a long service life (not less than four years) in a strict environment And the anti-fog performance is good.

Optionally, the anti-fogging film 4 is placed above 80° hot water for 1 minute after testing the reliability test of 85°C and 85% relative humidity (Relative Humidity, RH) in the laboratory for 1000h under strict conditions. The bottom of the hot water cup can be clearly seen through the anti-fog film 4 without obvious fogging.

In another embodiment, please refer to FIG. 4 to FIG. 6 and FIG. 8 together, the anti-fog film 4 is attached on the surface of the display panel 2 facing the touch panel 1 . The display panel 2 includes a frame and a film layer group (such as a polarizer) located inside the frame body, the surface of the frame body facing the touch panel 1 and the film layer group facing the touch panel 1 The surface is evenly arranged to avoid interference to the rollers of the cage machine and the attaching machine due to the height difference, thereby improving the feasibility of attaching the anti-fog film 4 operation. There is no gap between the anti-fog film 4 and the display panel 2 .

Optionally, the anti-fog film 4 covers the display panel 2 . The adhesive layer 3 is connected between the anti-fog film 4 and the touch panel 1 . At this time, the anti-fog film 4 covers the entire display panel 2 .

Optionally, the anti-fog film 4 covers the display area 21 and part of the non-display area 22 . The adhesive layer 3 adheres the display panel 2 , the anti-fog film 4 and the touch panel 1 simultaneously. A stepped surface is formed between the region of the adhesive layer 3 bonded to the anti-fog film 4 and the region bonded to the display panel 2 .

Optionally, the anti-fog film 4 includes a transparent optical adhesive (Optically Clear Adhesive, OCA) layer 41 , a base material 42 and a hydrophilic coating 43 which are stacked. The transparent optical adhesive layer 41 is connected between the substrate 42 and the display panel 2 . The hydrophilic coating 43 contacts the air in the gap 30 . The hydrophilic coating 43 can change the hydrophilic and hydrophobic states of the substrate 42 . The hydrophilic coating 43 is made of hydrophilic acrylic resin polymer material. The hydrophilic group of the hydrophilic coating 43 can grab water molecules, reduce the surface tension of water and the water contact angle of the contact interface, so that the water molecules can be evenly dispersed on the contact surface and form a layer before water droplets are formed. Water film, this layer of water film will not scatter the incident light, thereby reducing the scattering of light. The base material 42 can be made of polyethylene terephthalate (Polyethyleneterephthalate, PET) material or triacetyl cellulose (TAC) material. The transparent optical adhesive material of the transparent optical adhesive layer 41 is a solid pressure-sensitive adhesive, which has high transmittance and low water absorption, and its main component is acrylic ester.

In yet another embodiment, as shown in FIG. 7 , there are two anti-fog films 4 , which are a first layer of anti-fog film 44 and a second layer of anti-fog film 45 . The first layer of anti-fog film 44 is attached on the surface of the touch panel 1 facing the display panel 2 . The second layer of anti-fog film 45 is attached on the surface of the display panel 2 facing the touch panel 1 . At this time, the water vapor in the air in the gap 30 can be evenly distributed on the first layer of anti-fog film 44 and the second layer of anti-fog film 45 to further reduce the risk of fogging of the display panel 2. risk.

Optionally, the anti-fog film 4 and the adhesive layer 3 overlap, that is, the anti-fog layer 4 is completely covered on the adhesive layer 3, so that the sides of the anti-fog film 4 and the adhesive layer There is no gap on the side of 3, so that the anti-fog effect in the window area of the touch panel 1 can be further improved.

Please refer to FIG. 1 to FIG. 7 together. As an optional embodiment, the touch panel 1 has a window area 11 and a wiring area 12 arranged around the window area 11, and the window area 11 is in the display The orthographic projection on the panel 2 overlaps the display area 21 . At this time, the anti-fog film 4 also covers the window area 11 , and fogging in the window area 11 of the touch panel 1 is not easy. The light emitted from the display area 21 of the display panel 2 is emitted through the gap 30 , the anti-fog film 4 and the window area 11 to display images. The touch panel 1 senses a touch action on the window area 11 .

The touch panel 1 includes a substrate and a touch sensing layer formed on the substrate. The touch sensing layer can be a capacitive touch sensing layer, a resistive touch sensing layer, a temperature sensing touch sensing layer, a piezoelectric touch sensing layer or a surface acoustic wave touch sensing layer. The embodiment of the present application takes the capacitive touch sensing layer as an example for illustration.

The touch sensing layer is composed of transparent conductive lines. The transparent conductive circuit has a high transmittance of visible light. The control chip sends a signal to the transparent conductive circuit, and the signal is judged and processed by the processing chip to identify whether there is a touch action on the touch panel 1 and whether there is a touch. specific coordinates. The transparent conductive material of the transparent conductive circuit may be indium tin oxide (Indium tin oxide, ITO), metal mesh (metal mesh), nano-silver, graphene or carbon nanotubes and the like. The material of the substrate may be optical material COP, polyethylene terephthalate (Polyethylene terephthalate, PET) or glass. The touch sensing layer can be made by photolithography, etching or laser technology.

Please refer to FIG. 1 to FIG. 7 together. As an optional embodiment, the touch screen 100 further includes a protective panel 5 . The protection panel 5 is connected to the surface of the touch panel 1 away from the display panel 2 through a transparent adhesive layer 6 . The protective panel 5 can be a strengthened glass panel, or an organic plastic panel or organic plastic composite panel with high transmittance and scratch resistance, such as polymethyl methacrylate (polymethyl methacrylate, PMMA), polycarbonate Ester (Polycarbonate, PC), etc. The transparent laminating layer 6 can be made of optically transparent adhesive, the main component of which is acrylic ester.

In the embodiment of the present application, the manufacturing process of the touch screen 100 is as follows: the touch panel 1 is attached to the protective panel 5 to form a GFF (cover glass-upper sensing layer film-lower sensing layer film), GF (cover glass-sensing layer film), GG (cover glass-sensing layer glass) and other forms of structure. On the surface of the touch panel 1 away from the protective panel 5 or/and on the display panel 2, the anti-fog film 4 is pasted by a cage machine or an attaching machine. Through the adhesive layer 3 , the display panel 2 and the touch panel 1 are bonded to form the touch screen 100 .

The embodiments of the present invention have been described in detail above, and specific examples have been used in this paper to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only used to help understand the method and core idea of the present invention; at the same time, for Those skilled in the art will have changes in the specific implementation and scope of application according to the idea of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims (10)

1. A kind of 1. touch-screen, it is characterised in that the display panel that is oppositely arranged including touch panel, with the touch panel and The adhesive linkage being connected between the touch panel and the display panel, the adhesive linkage is annularly with the touch panel Gap is formed between the display panel, the touch-screen also includes between the touch panel and the display panel Antifog film, antifog film orthographic projection on said display panel covers the positive throwing of the gap on said display panel Shadow, to prevent the inner space from hazing.
2. 2. touch-screen as claimed in claim 1, it is characterised in that the display panel has viewing area and around the display The non-display area that area is set, the orthographic projection of the adhesive linkage on said display panel are located in the non-display area, described anti- The orthographic projection of mist film on said display panel covers the viewing area.
3. 3. touch-screen as claimed in claim 2, it is characterised in that the antifog film be attached at the touch panel towards institute State on the surface of display panel.
4. 4. touch-screen as claimed in claim 3, it is characterised in that the antifog film covers the touch panel, the bonding Layer is connected between the antifog film and the display panel.
5. 5. touch-screen as claimed in claim 3, it is characterised in that the orthographic projection of the antifog film on said display panel is covered Non-display area described in cover, the adhesive linkage are bonded touch panel, the antifog film and the display panel.
6. 6. touch-screen as claimed in claim 3, it is characterised in that the antifog film includes the transparent optical cement being stacked Layer, base material and hydrophilic coating, the transparent optical glue-line connect the touch panel.
7. 7. touch-screen as claimed in claim 2, it is characterised in that the antifog film be attached at the display panel towards institute State on the surface of touch panel.
8. 8. touch-screen as claimed in claim 2, it is characterised in that the quantity of the antifog film is two, and two described antifog Film is attached on the surface of the direction display panel of the touch panel described tactile with the direction of the display panel respectively Touch on the surface of panel.
9. 9. the touch-screen as described in any one of claim 2~8, it is characterised in that the antifog film overlaps with the adhesive linkage.
10. 10. a kind of terminal, it is characterised in that including the touch-screen as described in any one of claim 1~9.