Film display device

Abstract

The invention relates to a film display device which comprises a display, a glass lens and a transparent plastic film, the glass lens is attached to the front side of the display, and the plastic film is attached to the front side of the glass lens; the plastic film is characterized in that a light absorption layer is arranged on the edge section of the plastic film, the light absorption layer is a carbonized film layer formed by carbonizing and modifying the edge section of the plastic film through laser irradiation on the edge section of the plastic film, and the optical density of the carbonized film layer is larger than that of an original film body of the plastic film. When the film display device is used in dark environments such as night and the like, a circle of bright line formed at the edge section of the plastic film can be effectively eliminated, and the interference of the bright line on a display picture of a display is avoided.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a film display device. Background Art

[0002] like Figure 1 As shown, the display device in the prior art is generally covered with a glass lens 02 on the front side of the display 01, and the glass lens 02 can protect the display 01. In order to improve the explosion-proof performance of the glass lens 02, a layer of transparent plastic film 03 is generally attached to the front side of the glass lens 02, thereby preventing the broken glass fragments from splashing and causing injuries to people when the glass lens 02 is broken by impact, thereby improving the safety of use. However, since the display 01 generally displays by emitting display light 011 from the inside, the transparent plastic film 03 is equivalent to a light-guiding layer, which will conduct part of the display light 011 to the edge section of the plastic film 03 and emit it, so that in dark environments such as at night, a circle of bright lines can be observed at the edge of the plastic film 03, which interferes with the display screen of the display 01. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a film display device, which can effectively eliminate a circle of bright lines formed at the edge section of the plastic film when used in a dark environment such as at night, thereby avoiding interference with the display screen of the display. The technical solution adopted is as follows: A film display device comprises a display, a glass lens and a transparent plastic film, wherein the glass lens is attached to the front side of the display and the plastic film is attached to the front side of the glass lens; the characteristic is that a light absorbing layer is provided on the edge section of the plastic film, and the light absorbing layer is formed by carbonizing the edge section of the plastic film by irradiating the edge section of the plastic film with laser to modify the carbonized film layer, and the optical density of the carbonized film layer is greater than the optical density of the original film body of the plastic film.

[0004] When the above-mentioned film display device is working, when part of the display light emitted from the inside of the display is transmitted to the edge section of the plastic film, the light-absorbing layer can absorb these display lights to prevent them from being emitted from the edge section of the plastic film. Therefore, when used in a dark environment such as at night, a circle of bright lines formed at the edge section of the plastic film can be effectively eliminated, thereby avoiding interference with the display screen of the display.

[0005] Generally, the display is a backlit liquid crystal display, or a direct light-emitting display such as an OLED or LED, which can display by emitting light internally; the display may also have a touch function.

[0006] Generally, the glass lens is a glass lens with a thickness of 0.3 to 5 mm, such as a tempered glass lens, especially a glass lens with an edge that is carved and polished. After the edge of the glass lens is carved and polished, the light emission of the glass edge can be reduced. Generally, the glass lens is attached to the front side of the display through a transparent adhesive layer (such as OCA (optical adhesive)). In this way, the glass lens can be kept transparent at least in the display area of ​​the display so as not to affect the transmittance of the display image.

[0007] Generally, the plastic film is a transparent plastic film with a thickness of no more than 0.3 mm, such as transparent PET, PVC, PP, PMMA, TAC and other plastic films. The plastic film can be adhered to the front side of the glass substrate through a transparent adhesive layer.

[0008] Generally, the plastic film can be punched, sheared or cut into a certain shape (such as a rectangle) and then attached to the front side of the glass substrate, thereby forming an edge section around the plastic film. The edge of the plastic film will generally shrink inward relative to the edge of the glass lens, such as shrinking 0.1 to 1 mm, thereby ensuring that the plastic film is completely attached to the front side of the glass substrate and has support.

[0009] In order to enable the light absorbing layer to more effectively absorb the light transmitted between the plastic film and the display, as a preferred embodiment of the present invention, the optical density of the light absorbing layer is at least OD2.

[0010] As a further preferred embodiment of the present invention, the optical density of the light absorbing layer is at least OD4.

[0011] In order to prevent the light absorbing layer from affecting the appearance of the display, the light absorbing layer disposed on the edge section of the plastic film can be made extremely thin. As a preferred embodiment of the present invention, the thickness of the light absorbing layer is no more than 100 μm.

[0012] As a further preferred embodiment of the present invention, the thickness of the light absorbing layer is no more than 10 μm.

[0013] The plastic film can be a PET film. The PET film (i.e., polyethylene terephthalate film) is easy to be carbonized by laser due to its high transparency, thereby forming a light-absorbing layer with an optical density of at least OD3. In order to prevent the PET film from melting, the laser used is an ultraviolet laser (such as an excimer laser), thereby preventing the PET film from directly cutting the chemical bonds in the PET film when it melts, so that part of the carbon components are reorganized to form a light-absorbing layer. The plastic film can also be a PVC film (i.e., a polyvinyl chloride film). Since the PVC film has a higher carbon content, it is easier to form a light-absorbing layer at the edge after being carbonized by laser, and generally it is easy to form a light-absorbing layer with an optical density of at least OD4. The plastic film can also be a CPI film (i.e., a colorless polyimide film). Through laser irradiation, a large number of CO bonds and CN bonds in the edge section of the CPI film are broken and re-grafted to form CC bonds, forming a light-absorbing layer with an optical density of at least OD6.

[0014] As a preferred solution of the present invention, a black or dark-colored substrate layer is provided on the rear side of the glass lens, and the substrate layer corresponds to the position of the light-absorbing layer. Specifically, the substrate layer is a black or dark-colored ink coating or a photosensitive resin coating provided on the edge of the rear side of the glass substrate, and the middle part of the substrate layer is hollowed out to form a window for the display screen to be transmitted. In this way, the light-absorbing layer can be more difficult to be found by the naked eye against the background of the substrate layer, and the appearance of the display device can be guaranteed.

[0015] When making the above-mentioned light-absorbing layer, a thermal laser (such as a carbon dioxide laser) or an ultraviolet laser (such as an excimer laser) can be used to irradiate the edge section of the plastic film, so that the molecular chains of the film at the edge section of the plastic film will be broken and reorganized, so that it will be carbonized, and thus modified into a carbonized layer with an optical density greater than that of the plastic film itself. During the laser irradiation process, the process parameters such as the laser focal length, laser power, irradiation time, and spot diameter can be adjusted to achieve the purpose of forming the required carbonized layer while avoiding damage to the film structure (such as flatness). In addition, during the laser irradiation process, a certain gas, such as nitrogen, can be used for protection to prevent the plastic film from reacting with oxygen to generate a more ideal light-absorbing layer. In the above-mentioned process, it is generally necessary to set the laser spot to follow the edge section of the plastic film. Specifically, the edge of the plastic film can be dynamically captured by a camera or the like, and then the laser irradiation process is implemented.

[0016] As a preferred solution of the present invention, when making the light absorbing layer, the laser used is an ultraviolet laser. When the ultraviolet laser is irradiated on the edge section of the plastic film, it can directly cut off the non-carbon bonds of the plastic film in the irradiated area, and its thermal effect is low, rarely causing thermal damage to other parts of the plastic film through heat conduction, so that a light absorbing layer with better thickness uniformity can be formed.

[0017] As a preferred solution of the present invention, when making the light absorbing layer, the laser is used to irradiate the edge section of the plastic film at an angle, so that the laser can directly act on the edge section of the plastic film, which has a higher modification effect on the plastic film.

[0018] As a preferred solution of the present invention, when making the light absorbing layer, the spot energy of the laser used is distributed as high in the center and low at the edge; during the laser irradiation process, the chemical bonds inside the plastic film irradiated by the center of the spot are all cut off to form an edge section, and the chemical bonds inside the plastic film irradiated by the edge of the spot are partially cut off (mainly non-carbon bonds), so that it is carbonized and modified into the carbonized film layer. In the above-mentioned manufacturing process, a plastic film with a relatively large size can be prepared in advance, and the plastic film can be irradiated with a laser to achieve cutting to form its edge section. At the same time, the laser naturally forms the required light absorbing layer on the cut section, thereby saving the cutting process steps, and there is no need to capture the edge of the plastic film when irradiating the laser, and the process steps are simpler.

[0019] As a preferred embodiment of the present invention, when making the light absorbing layer, an inorganic transparent layer is firstly arranged on the front side of the plastic film, and then the edge section of the plastic film is irradiated by laser. The inorganic transparent layer can be an inorganic transparent film coated on the front side of the plastic film, such as transparent films such as silicon oxide, silicon nitride, niobium oxide or a combination thereof. In addition, the inorganic transparent layer can also be a coating containing tiny inorganic transparent particles, such as silicon oxide particles. The thickness of the inorganic transparent layer is generally within 10μm. During the modification process, the inorganic transparent layer does not participate in carbonization, and the carbonization reaction occurs inside the plastic film. The reaction substances (such as certain gases) escape from the edge section of the plastic film, and the damage to the surface is less, so that the edge smoothness of the plastic film is better, and the inorganic transparent layer can also isolate the inside of the plastic film from the air, thereby improving the quality of carbonization.

[0020] The front and rear mentioned in this specification respectively refer to: the side close to the display is the rear, and the side far from the display is the front.

[0021] Compared with the prior art, the present invention has the following advantages: This film display device is provided with a light-absorbing layer at the edge section of the plastic film. The light-absorbing layer is a carbonized film layer formed by carbonizing the edge section of the plastic film by irradiating the edge section of the plastic film with laser. The light-absorbing layer can absorb the display light transmitted to the edge section of the plastic film to prevent it from being emitted from the edge section of the plastic film. Therefore, when used in a dark environment such as at night, a circle of bright lines formed at the edge section of the plastic film can be effectively eliminated, thereby avoiding interference with the display screen of the display. In addition, the manufacturing process of the light-absorbing layer is simple, feasible and easy to implement. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a display device in the prior art.

[0023] Figure 2 It is a structural schematic diagram of a film display device provided in a preferred embodiment 1 of the present invention.

[0024] Figure 3 It is a schematic diagram of the state of the laser used in the preferred embodiment 1 of the present invention irradiating the edge section of the plastic film.

[0025] Figure 4 It is a schematic diagram of the state of the laser irradiating the edge section of the plastic film used in the second preferred embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the state of the laser irradiating the edge section of the plastic film used in the third preferred embodiment of the present invention.

[0027] Figure 6 This is an energy distribution diagram of the laser spot used in the third preferred embodiment of the present invention. DETAILED DESCRIPTION

[0028] Embodiment 1, as Figure 2-Figure 3 As shown, the film display device provided in this embodiment includes a display 1, a glass lens 2 and a transparent plastic film 3, the glass lens 2 is attached to the front side of the display 1, and the plastic film 3 is attached to the front side of the glass lens 2; the edge section of the plastic film 3 is provided with a light absorbing layer 31, and the light absorbing layer 31 is a carbonized film layer formed by carbonizing the edge section of the plastic film 3 by irradiating the edge section of the plastic film 3 with a laser 50, and the optical density of the light absorbing layer 31 is greater than the optical density of the original film body of the plastic film 3.

[0029] In this embodiment, the display 1 is a backlit liquid crystal display 1, or a direct light-emitting display 1 such as an OLED or LED, which can display by emitting light internally; the display 1 may also have a touch function.

[0030] In this embodiment, the glass lens 2 is a glass lens 2 with a thickness of 0.3 to 5 mm, such as a tempered glass lens, especially a glass lens with an edge that is carved and polished. After the edge of the glass lens is carved and polished, the light emission of the glass edge can be reduced. The glass lens 2 is attached to the front side of the display 1 through a transparent adhesive layer 4 (such as OCA (optical adhesive)). In this way, the glass lens 2 can remain transparent in the display area of ​​the display 1 so as not to affect the transmittance of the display image.

[0031] In order to enable the light absorbing layer 31 to more effectively absorb the light transmitted between the plastic film 3 and the display 1, in the present embodiment, the plastic film 3 is made of CPI film (i.e., colorless polyimide film), and a large number of CO bonds and CN bonds in the edge section of the CPI film are broken by irradiation with laser 50 and re-grafted to form CC bonds, thereby forming a light absorbing layer 31 with an optical density of at least OD6.

[0032] In order to prevent the light absorbing layer 31 from affecting the appearance of the display 1 , the light absorbing layer 31 disposed on the edge section of the plastic film 3 can be made extremely thin. In this embodiment, the thickness of the light absorbing layer 31 is less than 100 μm.

[0033] In this embodiment, the laser 50 used is an ultraviolet laser. When the ultraviolet laser is irradiated on the edge section of the plastic film 3, it can directly cut off the non-carbon bonds of the plastic film 3 in the irradiated area, and its thermal effect is low, and rarely causes thermal damage to other parts of the plastic film 3 through heat conduction, so that a light absorbing layer 31 with better thickness uniformity can be formed.

[0034] In this embodiment, a black or dark-colored substrate layer 5 is provided on the edge of the rear side of the glass lens 2, and the substrate layer 5 corresponds to the position of the light-absorbing layer 31. The substrate layer 5 is a coating formed by coating the edge of the rear side of the glass lens 2 with black or dark-colored ink or photosensitive resin, and the middle part of the substrate layer 5 is hollowed out to form a window for the display screen to be transmitted. In this way, the light-absorbing layer 31 can be more difficult to be found by the naked eye against the background of the substrate layer 5, and the appearance of the display device can be guaranteed.

[0035] When making the light absorbing layer 31, ultraviolet laser (such as excimer laser) is obliquely irradiated on the edge section of the plastic film 3, so that the film molecular chains at the edge section of the plastic film 3 are broken and reorganized, so that it is carbonized, and thus modified into a carbonized layer with an optical density greater than that of the plastic film 3 itself. During the irradiation of the laser 50, the process parameters such as laser focal length, laser power, irradiation time, and spot diameter can be adjusted to achieve the purpose of forming the desired light absorbing layer 31 while avoiding damage to the film structure (such as flatness). In addition, during the laser irradiation process, a certain gas, such as nitrogen, is also used for protection to prevent the plastic film 3 from reacting with oxygen to generate a more ideal light absorbing layer 31.

[0036] Example 2, reference Figure 4, when other parts are the same as those of the first embodiment, the difference is that: when making the light absorbing layer 31, an inorganic transparent layer 6 is firstly arranged on the front side of the plastic film 3, and the thickness of the inorganic transparent layer 6 is within 10 μm, and then the edge section of the plastic film 3 is irradiated by the laser 50. The inorganic transparent layer 6 can be an inorganic transparent film plated on the front side of the plastic film 3, such as transparent films such as silicon oxide, silicon nitride, niobium oxide, or a combination thereof. In addition, the inorganic transparent layer 6 can also be a coating containing tiny inorganic transparent particles, such as silicon oxide particles. During the modification process, the inorganic transparent layer 6 does not participate in carbonization, and the carbonization reaction occurs inside the plastic film 3. The reaction substances (such as certain gases) escape from the edge section of the plastic film 3, and the damage to the surface is less, so that the edge smoothness of the plastic film 3 is better, and the inorganic transparent layer 6 can also isolate the inside of the plastic film 3 from the air, thereby improving the quality of carbonization.

[0037] Example 3, reference Figure 5 , Figure 6 , when other parts are the same as those of the first embodiment, the difference is that: in this embodiment, when making the light absorbing layer 31, the energy of the laser spot 501 used is distributed as high in the middle and low at the edge. During the irradiation process of the laser 50, all the chemical bonds inside the plastic film 3 irradiated by the center of the laser spot 501 are cut off to form an edge section, and part of the chemical bonds inside the plastic film 3 irradiated by the edge of the laser spot 501 are cut off (mainly non-carbon bonds), so that it is carbonized and modified into a carbonized film layer. In the above process of making the light absorbing layer 31, a plastic film 3 of a larger size can be prepared in advance, and the plastic film 3 is irradiated by the laser 50 to achieve cutting to form its edge section. At the same time, the laser 50 naturally forms the required light absorbing layer 31 on the cut section, thereby saving the process steps of cutting, and there is no need to capture the edge of the plastic film 3 when irradiating the laser 50, and the process steps are simpler.

[0038] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different, and any equivalent or simple changes made based on the structure, features and principles of the patent concept of the present invention are included in the protection scope of the patent of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the present invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A film display device, comprising a display, a glass lens and a transparent plastic film, wherein the glass lens is attached to the front side of the display, and the plastic film is attached to the front side of the glass lens; characterized in that: The edge section of the plastic film is provided with a light absorbing layer, which is formed by carbonizing the edge section of the plastic film by irradiating the edge section with laser to modify the carbonized film layer, and the optical density of the carbonized film layer is greater than the optical density of the original film body of the plastic film.

2. A film display device according to claim 1, characterized in that: The optical density of the light absorbing layer is at least OD2.

3. A film display device according to claim 2, characterized in that: The optical density of the light absorbing layer is at least OD4.

4. The film display device according to claim 1, characterized in that: The thickness of the light absorbing layer is not greater than 100 μm.

5. The film display device according to claim 4, characterized in that: The thickness of the light absorbing layer is not greater than 10 μm.

6. The film display device according to claim 1, characterized in that: A black or dark-colored substrate layer is disposed on the rear side of the glass lens, and the substrate layer corresponds to the position of the light-absorbing layer.

7. A film display device according to any one of claims 1 to 6, characterized in that: When making the light absorbing layer, the laser used is ultraviolet laser.

8. A film display device according to any one of claims 1 to 6, characterized in that: When the light absorbing layer is produced, the laser is used to irradiate the edge section of the plastic film at an angle.

9. A film display device according to any one of claims 1 to 6, characterized in that: When making the light-absorbing layer, the energy of the laser spot used is distributed as high in the center and low at the edge; during the laser irradiation process, the chemical bonds inside the plastic film irradiated by the center of the spot are all cut off to form an edge section, and the chemical bonds inside the plastic film irradiated by the edge of the spot are partially cut off, causing it to be carbonized and modified into the carbonized film layer.

10. A film display device according to any one of claims 1 to 6, characterized in that: When the light absorbing layer is produced, an inorganic transparent layer is firstly arranged on the front side of the plastic film, and then the edge section of the plastic film is irradiated with laser.

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