CN111625142A - Protection cover plate, touch control assembly, display screen and electronic equipment - Google Patents
Protection cover plate, touch control assembly, display screen and electronic equipment Download PDFInfo
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- CN111625142A CN111625142A CN202010454067.8A CN202010454067A CN111625142A CN 111625142 A CN111625142 A CN 111625142A CN 202010454067 A CN202010454067 A CN 202010454067A CN 111625142 A CN111625142 A CN 111625142A
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- layer
- protective cover
- film
- base
- display screen
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention relates to a protective cover plate, a touch control assembly, a display screen and electronic equipment, wherein the protective cover plate is used for being connected with a touch control panel to protect the touch control panel, and comprises: the base layer is provided with a first surface and a second surface which are arranged oppositely, and the first surface is used for being connected with the touch panel; the connecting glue layer is arranged on the second surface; the shock absorption layer is arranged on the surface, far away from the base layer, of the connecting glue and used for absorbing impact force so as to weaken the impact force acting on the base layer. In the present invention, the shock absorbing layer can absorb the impact force and further reduce the impact force acting on the base layer. For example when the protection apron is buckled or when external force strikes the protection apron, can reduce the impact force of effect on the basic unit through inhaling the shake layer, effectively avoid the basic unit to break, improve the life of protection apron.
Description
Technical Field
The invention relates to the field of display devices, in particular to a protective cover plate, a touch control assembly, a display screen and electronic equipment.
Background
The foldable display screen has become a hot spot direction for the development of the display screen industry in the future, wherein the foldable display screen mainly comprises a protective cover plate, a touch panel and a display panel which are sequentially overlapped. At present, the foldable display screen is applied to the smart phone, but in the using process, the protective cover plate of the foldable display screen is easy to break and damage, and the breaking condition of the protective cover plate in the bending area of the foldable display screen is more serious.
Disclosure of Invention
The invention provides a protective cover plate, a touch control assembly, a display screen and electronic equipment, and aims to solve the problem that the protective cover plate of a foldable display screen is easy to break.
A protective cover for interfacing with a touch panel to provide protection to the touch panel, the protective cover comprising: the base layer is provided with a first surface and a second surface which are arranged oppositely, and the first surface is used for being connected with the touch panel; the connecting glue layer is arranged on the second surface; the shock absorption layer is arranged on the surface, far away from the base layer, of the connecting glue and used for absorbing impact force so as to weaken the impact force acting on the base layer.
In the present invention, the shock absorbing layer can absorb the impact force and further reduce the impact force acting on the base layer. For example when the protection apron is buckled or when external force strikes the protection apron, can reduce the impact force of effect on the basic unit through inhaling the shake layer, effectively avoid the basic unit to break, improve the life of protection apron.
Further, the base layer is made of ultrathin glass, wherein the thickness of the ultrathin glass is less than 50 um; and/or the compressive stress of the ultrathin glass is more than 700 MPa; and/or the thickness of a chemical strengthening layer formed after the chemical strengthening treatment of the ultrathin glass is more than 10 um; and/or the light transmittance of the ultrathin glass is greater than 90%; and/or the ultra-thin glass has a haze of less than 1%.
Furthermore, the connecting glue layer is an optical glue film.
Furthermore, the glass transition temperature of the optical adhesive film is-30 ℃ to-50 ℃, so that the OCA has good elasticity and bending capability, the protective cover plate can be effectively prevented from generating creases due to pulling and extrusion between the base layer and the shock absorption layer in the folding process of the protective cover plate, and the weather resistance of the optical adhesive film can be improved, so that the optical adhesive film can also have good elasticity and bending capability in a low-temperature environment; and/or the adhesive force of the optical film is greater than or equal to 4N/25mm so as to enable the base layer and the shock absorption layer to be bonded more firmly.
Further, the shock absorption layer comprises a base film, a hardening film arranged on the base film, and an anti-fingerprint film arranged on the hardening film and far away from the base film, wherein the surface of the base film far away from the hardening film is connected with the connecting glue layer, and the base film is made of any one of PET and CPI; or the shock absorption layer comprises a base film and a hardening film arranged on the base film, wherein the surface of the PET, which is far away from the hardening film, is connected with the connecting glue layer, and the base film is made of any one of PET and CPI.
Further, the shock absorbing layer includes a first intermediate region, and a first edge region located outside the first intermediate region; the protection apron still includes the light shield layer, the light shield layer shaping is in first marginal area, and be located inhale shake the layer with connect between the glue film.
Further, the base layer comprises a second middle area and a second edge area positioned outside the second middle area; the protective cover plate further comprises a light shielding layer, and the light shielding layer is formed in the second edge region and located between the connecting glue layer and the base layer.
A touch assembly, comprising: a protective cover as described in any one of the above; and the touch panel is connected with the surface of the base layer, which is far away from the shock absorption layer.
A display screen, comprising: a display panel; the touch panel is arranged on the display panel; the surface of the base layer, which is far away from the shock absorption layer, is connected with the touch panel.
Further, the display screen is a foldable display screen.
The invention also provides an electronic device comprising the display screen.
Drawings
Fig. 1 is a schematic stacked view of a display panel according to a first embodiment of the present invention;
FIG. 2 is a schematic stacked view of a display panel according to a second embodiment of the present invention;
fig. 3 is a schematic stacked view of a display panel according to a third embodiment of the invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
As shown in fig. 1, a display screen 100 provided by a first embodiment of the present invention may be a foldable display screen, and the display screen 100 includes a protective cover 10, a touch panel 20, and a display panel 30. The display panel 30 is used for displaying corresponding information such as images and characters; the touch panel 20 and the display panel 30 facilitate a user to perform a corresponding touch operation according to the display content of the display panel 30, wherein in the present embodiment, the touch panel 20 is disposed on the display surface 301 of the display panel 30; the protective cover 10 is disposed on a surface of the touch panel 20 away from the display panel 30 for protecting the touch panel 20 from being scratched by a foreign object.
As shown in fig. 1, in the first embodiment, a protective cover 10 includes a base layer 1, a connection glue layer 2, and a shock-absorbing layer 3. Wherein, the base layer 1 has a first surface 11 and a second surface 12 which are oppositely arranged, the connecting glue layer 2 is arranged on the second surface 12, and the shock absorbing layer 3 is arranged on the surface of the connecting glue layer 2 far away from the base layer 1. In the present embodiment, the first surface 11 of the base layer 1 is contiguous to the surface of the touch panel 20 away from the display panel 30, that is, in the whole display screen 100, the shock absorbing layer 3 is disposed at the outermost layer, and the base layer 1 is disposed at the inner side of the shock absorbing layer 3.
In the present embodiment, the base layer 1 is made of a high hardness, brittle material, and mainly provides a certain hardness to the entire protective cover plate 10. For example, the base layer 1 may be an ultra-thin glass, and the ultra-thin glass is chemically thinned and strengthened, so that the ultra-thin glass has better impact resistance and bending property. Specifically, in this embodiment, the thickness of the ultra-thin glass is less than 50um, the compressive stress is greater than 700Mpa, and the thickness of the chemical strengthening layer formed after the chemical strengthening treatment of the ultra-thin glass is greater than 10 um. In addition, in the present embodiment, the light transmittance of the ultra-thin glass is greater than 90%, so that the protective cover plate 10 may have good light transmittance. Meanwhile, in the present embodiment, the haze of the ultra-thin glass is less than 1%, so that a user can more clearly see the display content of the display panel 30 on the side of the protective cover 10 away from the display panel 30. As shown in the following table, the main parameters of the base layer 1 in the present embodiment are shown.
In the following table, HC Spec refers to the specification requirements for ultra-thin glass, Econy (30um) and Econy (50um) refer to the specification characteristics for two common ultra-thin glasses with thicknesses of 30um and 50 umd. Total Transmitance refers to the light Transmittance requirement, Haze refers to the Haze requirement, Color L (D65), Color A (D65) and Color B (D65) refer to the Lab Color model requirement of a D65 light source, Pensil Hardness refers to the Pencil Hardness requirement, Compressive stress refers to the Compressive stress requirement, Depth of Layer requirement, TTV refers to the Total thickness change requirement, Flexibility, U-shape,200K refers to the 200K bending test requirement, and warp refers to the warp requirement.
As shown in fig. 1, in the present embodiment, the shock absorbing layer 3 includes a base film 3a, and a hardened film 3b disposed on the base film 3a, wherein the surface of the base film 3a away from the hardened layer 3b is in contact with the connection glue layer. In the present embodiment, the shock absorbing layer 3 has a hardness of 3H to 7H. In addition, the material of the base film 3a may be any one of PET and CPI, and the hardening film 3b may be disposed on a side of the base film 3a away from the display panel 30, so that the base film 31 can be effectively prevented from being damaged by an external force.
In the present embodiment, the shock absorbing layer 3 is mainly used to absorb an impact force to attenuate the impact force acting on the base layer 1. For example, when the display screen 100 is folded (the protection cover plate 10 is folded at this time) or the protection cover plate 10 is impacted by external force, the shock absorbing layer 3 can absorb energy and reduce the impact force acting on the base layer 1, so that the base layer 1 can be effectively prevented from being broken, and the service life of the protection cover plate 10 is prolonged.
In addition, in the present embodiment, the shock absorbing layer 3 further includes an anti-fingerprint film 3c, and the anti-fingerprint film 3c is provided on the surface of the hardened film 3b remote from the base film 3a so that the water drop angle of the surface of the shock absorbing layer 3 remote from the base layer 1 is greater than 110 ° in order to give the shock absorbing layer 3 good anti-fingerprint properties. It is understood that, in some embodiments, the anti-fingerprint film 3c may not be provided in the shock absorbing layer 3.
In this embodiment, connect glue film 2 for OCA (optical coating), set up at basic unit 1 and inhale between shake layer 3, OCA is a polymer adhesion coating, and itself does not have hardness can say, when display screen 100 is folding, OCA can provide certain elasticity space, and then improves the ability of buckling of protection apron 10. Meanwhile, a certain amount of energy can be absorbed by the OCA, so that the impact force acting on the base layer 1 is reduced.
In this embodiment, the adhesion of the OCA is 4N/25mm or more, so that the base layer 1 and the shock-absorbing layer 3 are bonded more firmly. In addition, the glass transition temperature (Tg) of the OCA is-30 ℃ to-50 ℃, and the Storage Modulus (Storage module) thereof is maintained at less than 200Mpa at each temperature, so that the OCA has good elasticity and bending capability, thereby effectively preventing the protective cover plate 10 from being creased due to pulling and extrusion between the base layer 1 and the shock-absorbing layer 3 during the folding process of the display screen 100.
Through the setting, make the protection apron 10 that this embodiment provided have good bending performance, in the test of buckling, protection apron 10 can be when the radius of buckling is 3mm, through 200K times bending test after bad phenomena such as touch function abnormity, crease, laminating separation with the optical cement.
As shown in fig. 1, in the first embodiment, the protective cover 10 has a light shielding layer 4, so that the protective cover 10 has a visible region and a non-visible region 102 disposed outside the visible region. Wherein, the area of the shock absorption layer 3 corresponding to the visible area is a first intermediate area 34, the area of the shock absorption layer 3 corresponding to the invisible area 102 is a first edge area 35, the light shielding layer 4 is formed on the first edge area 35, and the assembled light shielding layer 4 is located between the shock absorption layer 3 and the connection glue layer 2. In this embodiment, the light shielding layer 4 may be an ink layer, and may be disposed on the shock absorbing layer 3 by printing, which is more convenient for the light shielding layer 4 to be disposed, and may reduce the manufacturing cost of the protective cover plate 10 to a certain extent.
Of course, in other embodiments, the light shielding layer 4 may also be disposed on the base layer 1, for example, as shown in fig. 2, in the second embodiment provided by the present invention, the region of the base layer 1 corresponding to the visible region is the second middle region 13, the region of the base layer 1 corresponding to the non-visible region 102 is the second edge region 14, and the light shielding layer 4 is formed on the second edge region 14. Meanwhile, the light shielding layer 4 is provided between the connection layer and the base layer 1, so that the light shielding layer 4 can be prevented from being scratched by foreign matter.
As shown in fig. 1, in the first embodiment, the touch panel 20 includes a first touch unit 201, a second touch unit 202, and an optical adhesive layer 203 for adhering the first touch unit 201 and the second touch unit 202 together. The first touch unit 201 includes a first substrate 5 and a first touch layer 6 formed on the first substrate 5, and the second touch unit 202 includes a second substrate 7 and a second touch layer 8 formed on the second substrate 7. After the touch panel 20 is assembled, the first touch layer 6, the first substrate 5, the optical adhesive layer 203, the second touch layer 8, and the second substrate 7 are sequentially stacked, wherein a capacitive contact is formed between the first touch layer 6 and the second touch layer 8 to detect touch information of a user.
In the present embodiment, the material of the first substrate 5 and the second substrate 7 may be PET, CPI, COP, or the like. In order to improve the display effect, the light transmittance of the first substrate 5 and the second substrate 7 is greater than 90%, and the haze is less than 1%. The first touch layer 6 and the second touch layer 8 may be an ITO layer, a metal mesh layer, or a nano silver layer, etc. In addition, when the display screen 100 is assembled, the protective cover 10 and the touch panel 20 and the display panel 30 are connected together by optical glue. After assembly, the first touch layer 6 is located between the protective cover 10 and the first substrate 5.
It is understood that in other embodiments, the touch panel 20 may be disposed in other manners, for example, as shown in fig. 2, in the second embodiment provided in the present invention, the touch panel 20 has only one substrate, which is defined as a third substrate 9, the third substrate 9 has a first supporting surface 91 and a second supporting surface 92 disposed opposite to each other, wherein the first touch layer 6 is formed on the first supporting surface 91, and the second touch layer 8 is formed on the second supporting surface 92.
For another example, as shown in fig. 3, in the third embodiment of the present invention, the first touch layer 6 and the second touch layer 8 are both formed on the first carrying surface 91, and the touch panel 20 is equivalent to a SITO touch panel. After assembly, the first touch layer 6 and the second touch layer 8 are located between the third substrate 9 and the protective cover 10.
It is understood that, in actual production, the protective cover 10 and the touch panel 20 may be assembled into a touch assembly, so as to facilitate storage and transportation of the touch panel 20.
The invention also provides an electronic device comprising the display screen 100 shown in any of the above embodiments. The electronic device can be a mobile phone, a tablet computer and other terminal products.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A protective cover plate is used for being connected with a touch panel to provide protection for the touch panel, and is characterized by comprising:
the base layer is provided with a first surface and a second surface which are arranged oppositely, and the first surface is used for being connected with the touch panel;
the connecting glue layer is arranged on the second surface;
the shock absorption layer is arranged on the surface, far away from the base layer, of the connecting glue layer and used for absorbing impact force so as to weaken the impact force acting on the base layer.
2. The protective cover sheet of claim 1 wherein said base layer is ultra-thin glass,
wherein the thickness of the ultrathin glass is less than 50 um; and/or
The compressive stress of the ultrathin glass is more than 700 MPa; and/or
The thickness of a chemical strengthening layer formed after the chemical strengthening treatment of the ultrathin glass is more than 10 um; and/or
The light transmittance of the ultrathin glass is more than 90 percent; and/or
The ultra-thin glass has a haze of less than 1%.
3. The protective cover sheet of claim 1, wherein the adhesive layer is an optical adhesive film.
4. The protective cover sheet of claim 3, wherein the optical adhesive film has a glass transition temperature of-30 ℃ to-50 ℃; and/or
The adhesive force of the optical adhesive film is greater than or equal to 4N/25 mm.
5. The protective cover sheet according to claim 1,
the shock absorption layer comprises a base film, a hardening film arranged on the base film and an anti-fingerprint film arranged on the hardening film and far away from the base film, wherein the surface of the base film far away from the hardening film is connected with the connecting glue layer, and the base film is made of any one of PET and CPI; or
The shock absorption layer comprises a base film and a hardening film arranged on the base film, wherein the surface of the PET, which is far away from the hardening film, is connected with the connecting glue layer, and the base film is made of any one of PET and CPI.
6. The protective cover sheet of claim 1 further comprising any one of:
the shock absorbing layer comprises a first middle area and a first edge area positioned outside the first middle area, and the protective cover plate further comprises a light shielding layer which is formed in the first edge area and positioned between the shock absorbing layer and the connecting glue layer; or
The base layer includes a second middle region, and a second edge region located outside the second middle region; the protective cover plate further comprises a light shielding layer, and the light shielding layer is formed in the second edge region and located between the connecting glue layer and the base layer.
7. A touch assembly, comprising:
a protective cover sheet according to any one of claims 1 to 6;
and the touch panel is connected with the surface of the base layer, which is far away from the shock absorption layer.
8. A display screen, comprising:
a display panel;
a touch panel combined with the display panel; a protective cover as claimed in any one of claims 1 to 6, wherein a surface of the base layer remote from the shock absorbing layer is contiguous with the touch panel.
9. A display screen in accordance with claim 8, wherein the display screen is a foldable display screen.
10. An electronic device characterized by comprising a display screen according to claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010454067.8A CN111625142A (en) | 2020-05-26 | 2020-05-26 | Protection cover plate, touch control assembly, display screen and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010454067.8A CN111625142A (en) | 2020-05-26 | 2020-05-26 | Protection cover plate, touch control assembly, display screen and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN111625142A true CN111625142A (en) | 2020-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010454067.8A Pending CN111625142A (en) | 2020-05-26 | 2020-05-26 | Protection cover plate, touch control assembly, display screen and electronic equipment |
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| CN (1) | CN111625142A (en) |
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| CN114774019A (en) * | 2022-04-24 | 2022-07-22 | 武汉华星光电半导体显示技术有限公司 | Display screen cover plate and display device |
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