CN108076177B - Mobile terminal - Google Patents

Abstract

The invention relates to a mobile terminal, which is provided with a reference plane and comprises: a housing; the cover plate comprises a binding surface, a first light-transmitting surface and a second light-transmitting surface, the binding surface is fixed on the shell, the first light-transmitting surface is provided with a first end and a second end, the first end is connected with the binding surface, the second end is connected with the second light-transmitting surface, and the distance from the first light-transmitting surface to the binding surface is gradually increased from the first end to the second end; the flexible display screen is arranged on the shell and provided with a luminous display area and a non-display area which is arranged at the edge of the display area and does not emit light; the non-display area is bent towards the cover plate relative to the display area; and a reflective layer covering the entire non-display area; the flexible display screen emits emergent rays, the non-display area and the reflecting layer have vertical projection on the reference plane, and the intersection point of the reverse extension line of the emergent rays and the vertical projection covers all the vertical projection. The existence of a non-display area sensed by a user is eliminated, and the user experience is improved.

Description

Mobile terminal

Technical Field

The invention relates to the technical field of mobile terminals, in particular to a mobile terminal.

Background

For mobile terminals such as mobile phones and the like, a driving circuit for controlling the pixel units to emit light is arranged at the edge of a flexible display screen of the mobile terminals, an area occupied by the driving circuit is a non-display area (commonly called a black edge) which does not emit light, and when the flexible display screen is lightened, the black edge arranged on the flexible display screen can influence the visual effect of the mobile terminal, so that the user experience is reduced.

Disclosure of Invention

One technical problem solved by the present invention is how to eliminate the user perception of the presence of non-display areas on a flexible display screen.

A mobile terminal having a reference plane perpendicular to a thickness direction of the mobile terminal, the mobile terminal comprising:

a housing;

the cover plate comprises a binding surface, a first light-transmitting surface and a second light-transmitting surface, the binding surface is connected with the shell, the first light-transmitting surface is provided with a first end and a second end, the first end is connected with the binding surface, the second end is connected with the second light-transmitting surface, and the distance from the first light-transmitting surface to the binding surface is gradually increased from the first end to the second end;

the flexible display screen is arranged on the shell and provided with a luminous display area and a non-display area which is arranged at the edge of the display area and does not emit light; the non-display area is bent towards the cover plate relative to the display area; and

a reflective layer covering all of the non-display area;

incident light rays emitted by the flexible display screen form emergent light rays after passing through the first light-transmitting surface, the non-display area and the reflecting layer have vertical projection on the reference plane, and the intersection point of the reverse extension line of the emergent light rays and the vertical projection covers all the vertical projection.

In one embodiment, the first light-transmitting surface is an arc-shaped curved surface, and the attaching surface and the second light-transmitting surface are parallel planes.

In one embodiment, the first light-transmitting surface is an arc-shaped curved surface, the attaching surface includes a first unit surface and a second unit surface, the first unit surface is connected between the first light-transmitting surface and the second unit surface, the second unit surface and the second transparent surface are parallel planes, and an included angle between the first unit surface and the second unit surface is α, wherein 0 ° < α ≦ 90 °.

In one embodiment, a first mounting surface and a second mounting surface are concavely formed on the outer surface of the shell, the first mounting surface and the second mounting surface define a step, and the cover plate is mounted on the step.

In one embodiment, the non-display area includes a first plate segment perpendicular to the display area and a bent segment connecting the first plate segment and the display area at the same time.

In one embodiment, the bending section comprises a first arc surface and a second arc surface which are arranged oppositely, and the first arc surface is closer to the reflecting layer than the second arc surface; the first arc surface and the second arc surface are both quarter arc surfaces which are concentrically arranged.

In one embodiment, the non-display area includes a first plate segment and a second plate segment, the second plate segment simultaneously connecting the display area and the first plate segment, the second plate segment being coplanar with the display area, the first plate segment being perpendicular to the second plate segment.

In one embodiment, the cover plate further comprises a glue body connected between the cover plate and the shell.

In one of them embodiment, still include the silk screen printing glue film, the silk screen printing glue film with the cementing body is connected, the silk screen printing glue film is attached on at least one in the apron and the casing.

In one embodiment, any one of the following is further included:

the reflecting layer is a mirror reflecting film, and the mirror reflecting film is made of silver materials, gold materials or aluminum materials.

The reflection layer is an antireflection film, and the antireflection film is made of an aluminum oxide material, a titanium oxide material or an aluminum nitride material.

One technical effect of one embodiment of the invention is that: the cover plate is provided with a first light-transmitting end and a second light-transmitting end, the distance from the first light-transmitting surface to the binding surface is gradually increased, the cover plate plays a role of a convex lens in light gathering, when incident light emitted by the flexible display screen penetrates through the first light-transmitting surface through the cover plate, the incident light forms emergent light due to refraction, vertical projection exists between the non-display area and the reflecting layer on the reference plane, a plurality of intersection points are formed by intersecting reverse extension lines of the emergent light and the vertical projection, the intersection points cover the non-display area and the whole vertical projection of the reflecting layer on the reference plane, when observation is carried out along the emergent light, luminous false images exist in the non-display area and the reflecting layer, the situation that naked eyes perceive the non-display area and the reflecting layer in vision is avoided, and the user experience of the mobile terminal is improved. Meanwhile, due to the reflection of the reflection layer on the light and the shielding effect on the non-display area, when the non-display area and the reflection layer are observed from a non-vertical reference plane, the existence of the non-display area and the reflection layer can not be perceived by naked eyes.

Drawings

Fig. 1 is a schematic plan structure diagram of a mobile terminal according to an embodiment;

FIG. 2 is a schematic cross-sectional view of C-C of FIG. 1;

FIG. 3 is a schematic structural diagram of the cover plate in FIG. 2;

FIG. 4 is a schematic structural view of the housing of FIG. 2;

FIG. 5 is a schematic structural diagram of the flexible display screen of FIG. 2;

fig. 6 is a schematic cross-sectional structure diagram of a mobile terminal according to another embodiment;

FIG. 7 is a schematic structural diagram of the cover plate in FIG. 6;

fig. 8 is a schematic structural diagram of the flexible display screen in fig. 6.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

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. The terms "inner", "outer", "left", "right" and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Referring to fig. 1 to 3, a mobile terminal 10 includes a housing 200, a cover 100, a flexible display 300, and a reflective layer 400. The flexible display screen 300 comprises a non-display area 310 and a display area 320, wherein the non-display area 310 is arranged at the edge of the display area 320, the display area 320 can emit light to display an image, the non-display area 310 is a driving circuit structure (the driving circuit structure is used for driving pixels in the display area 320 to emit light), the non-display area 310 cannot emit light to display an image, and the non-display area 310 forms a black edge which is commonly known as a black edge. The flexible Display 300 may be an LCD (liquid crystal Display) or an OLCD (Organic Light-Emitting Diode) Display, etc. The non-display area 310 is bent toward the cover 100 relative to the display area 320, that is, the non-display area 310 is bent upward relative to the display area 320 at an angle, and the whole flexible display 300 is not in the same plane.

Referring to fig. 1 to 3, the cover plate 100 includes a bonding surface 130, a first light-transmitting surface 110, and a second light-transmitting surface 120. The second light-transmitting surface 120 is opposite to the attachment surface 130, the attachment surface 130 is fixed on the housing 200, the first light-transmitting surface 110 and the second light-transmitting surface 120 are disposed toward the outside, the attachment surface 130 is disposed toward the flexible display 300 and the cover plate 100, the first light-transmitting surface 110 is connected between the attachment surface 130 and the second light-transmitting surface 120, the first light-transmitting surface 110 has a first end 111 and a second end 112, the first end 111 of the first light-transmitting surface 110 is connected with the attachment surface 130, the second end 112 of the first light-transmitting surface 110 is connected with the second light-transmitting surface 120, a distance H from the first light-transmitting surface 110 to the attachment surface 130 is gradually increased from the first end 111 to the second end 112 of the first light-transmitting surface 110, that is, the thickness of the part of the cover plate 100 is gradually increased from the first end 111 to the second end 112 of.

A reference plane 20 perpendicular to the thickness direction of the mobile terminal 10 is provided, and the reference plane 20 is used only as a reference plane. Since the thickness of the portion of the cover plate 100 corresponding to the first light-transmitting surface 110 gradually increases from the first end 111 to the second end 112 of the first light-transmitting surface 110, the portion of the cover plate 100 will function as a convex lens. When the non-display area 310 and the reflective layer 400 have a vertical projection on the reference plane 20, and an incident light ray 301 emitted from the flexible display screen 300 penetrates through the first light-transmitting surface 110 via the portion of the cover plate 100, the incident light ray 301 will be refracted to form an emergent light ray 302, and the emergent light ray 302 will change the original propagation path of the incident light ray 301, for example, the emergent light ray 302 is transmitted perpendicularly to the reference plane 20, and the reversely extended lines 303 of a plurality of emergent light rays 302 intersect with the vertical projection to form a plurality of intersection points, and the plurality of intersection points cover the non-display area 310 and the entire vertical projection of the reflective layer 400 on the reference plane 20. Therefore, when looking along the emergent light ray 302 toward the flexible display 300 (i.e., looking in a direction perpendicular to the reference plane 20), the naked eye can observe the top of the non-display area 310 and the reflective layer 400 to emit light to display an image, i.e., the non-display area 310 and the top of the reflective layer 400 have the illusion of emitting light, thereby preventing the naked eye from visually perceiving the existence of the non-display area 310 and the reflective layer 400 and improving the user experience of the mobile terminal 10.

When viewed from a direction not perpendicular to the reference plane 20, the reflective layer 400 covers the non-display area 310, and the non-display area 310 cannot be observed by naked eyes, and meanwhile, the reflective layer 400 reflects light emitted from the flexible display 300 in a direction away from the cover plate 100, and the reflective layer 400 cannot be observed by naked eyes. Therefore, by the reflection of the light by the reflective layer 400 and the refraction of the light by the cover 100, the user perception of the presence of the reflective layer 400 and the non-display area 310 is visually eliminated, which improves the user experience of the mobile terminal 10.

If the entire flexible display 300 is in the same plane, i.e. the non-display area 310 is not bent with respect to the display area 320, the width occupied by the non-display area 310 in the horizontal direction is just the total length of the non-display area 310 in the horizontal direction. However, since the non-display area 310 is bent toward the cover 100 with respect to the display area 320, the entire flexible display 300 is not in the same plane. The non-display area 310 has a portion parallel to the vertical direction, and compared with the case that the whole flexible display screen 300 is in the same plane, the width occupied by the non-display area 310 in the horizontal direction is reduced, and in the case that the overall size of the housing 200 is not changed, the width occupied by the display area 320 in the horizontal direction can be increased by bending the non-display area 310 relative to the display area 320, so that the image display effect of the flexible display screen 300 is further improved.

In some embodiments, the reflective layer 400 is a specular reflective film made of a silver material, a gold material, an aluminum material, or the like. The thickness of the reflective layer 400 ranges from 1 μm to 3 μm. The specular reflection film may be attached to the shielding layer by a Physical Vapor Deposition (PVD) process. In the process of forming the specular reflection film, first, the non-display area 310 is pretreated to remove oil stains and dust on the surface of the non-display area 310. Then, the flexible display panel 300 and a film forming material such as a silver material, an alloy material, or an aluminum material are placed in the deposition chamber, and the deposition chamber is vacuumized. Finally, the film forming material is evaporated or sublimated to the surface of the non-display area 310 by a certain heating manner to form a specular reflection film. The heating temperature of the film forming material may be determined according to parameters such as the melting point and the saturated vapor pressure, and for example, the temperature in the evaporation chamber may be 300 ℃ to 1000 ℃. There are various heating methods for heating the film forming material, and heating methods such as resistance heating, electron beam heating, high-frequency induction heating, arc heating, and laser heating can be selected as needed in actual circumstances.

In some embodiments, the reflective layer 400 is an antireflection film made of an aluminum oxide material, a titanium oxide material, or an aluminum nitride material. The light that flexible display screen 300 sent reachs the two relative surfaces that increase the anti-membrane and reflects, and the light that is reflected by increasing anti-membrane twice has the coherence, can produce coherent stack to make two bundles of light after the reflection strengthen because of interfering, flexible display screen 300 will be increased anti-membrane kicking in towards the anti-membrane and will be increased anti-membrane and reflect towards the direction that deviates from apron 100, ensure that naked eye can't see and increase anti-membrane. The number of the reflection increasing films may be one, for example, the reflection increasing films are made of aluminum oxide materials, and of course, the number of the reflection increasing films may be multiple, for example, three layers, the first reflection increasing film is made of aluminum oxide materials, the second reflection increasing film is made of titanium oxide materials, the third reflection increasing film is made of aluminum nitride materials, and the multiple reflection increasing films are arranged to further enhance the reflection capability of the reflection layer 400 for different wavelengths of light.

Referring to fig. 7, in some embodiments, the first light-transmitting surface 110 is an arc-shaped curved surface, such as an arc-shaped curved surface, a parabolic curved surface, or an elliptical curved surface, the entire attachment surface 130 is a plane, that is, the attachment surface 130 is not bent, and the attachment surface 130 and the second light-transmitting surface 120 are planes parallel to each other, in other embodiments, referring to fig. 3, the attachment surface 130 may also be bent to some extent, in this case, the cross-sectional shape of the attachment surface 130 is an L-shape, the attachment surface 130 may include a first unit surface 131 and a second unit surface 132, both the first unit surface 131 and the second unit surface 132 are planes, one end of the first unit surface 131 is connected to the second unit surface 132, the other end of the first unit surface 131 is connected to the first light-transmitting surface 110, the second unit surface 132 is a plane parallel to the second transparent surface, an included angle between the first unit surface 131 and the second unit surface 132 is α, wherein α is smaller than or equal to 90 °, and when α is 90 °, the first unit surface 131 and the second unit surface 132 are perpendicular to α, which is certainly the above-mentioned integral plane.

Referring to fig. 2 to 4, a first mounting surface 210 and a second mounting surface 220 are concavely formed on an outer surface of the housing 200, the first mounting surface 210 and the second mounting surface 220 are both planar and perpendicular to each other, the first mounting surface 210 and the second mounting surface 220 jointly define a step 201, the cover plate 100 is mounted on the step 201, when an included angle between the first unit surface 131 and the second unit surface 132 is α degrees, the first unit surface 131 and the second unit surface 132 are perpendicular to each other, when the cover plate 100 is mounted, portions close to two ends of the second unit surface 132 are stacked on the second mounting surface 220, the first unit surface 131 is stacked on the first mounting surface 210, and the mounting accuracy of the cover plate 100 on the housing 200 can be improved by positioning the first mounting surface 210 and the second mounting surface 220, when the attachment surface 130 is planar as a whole, that is not bent, portions close to two ends of the second unit surface 132 are also stacked on the second mounting surface 220, and a portion of the first attachment surface 110 close to the light-transmitting surface 130 is connected with the first mounting surface 210.

Referring to fig. 2 and 5, in some embodiments, the non-display region 310 includes a first plate section 311 and a bending section 312, a top end of the first plate section 311 is disposed near the cover plate 100, the first plate section 311 is perpendicular to the display region 320, one end of the bending section 312 is connected to the display region 320, and the other end of the bending section 312 is connected to the first plate section 311. The bending section 312 includes a first arc surface 312a and a second arc surface 312b, the first arc surface 312a and the second arc surface 312b jointly form two opposite surfaces of the bending section 312, the first arc surface 312a is closer to the reflective layer 400 than the second arc surface 312b, that is, the first arc surface 312a is disposed close to the reflective layer 400, and the second arc surface 312b is disposed close to the housing 200. Of course, the two opposite surfaces of the bending section 312 may also be in other curved forms, such as paraboloids, ellipsoids, etc.

The first arc surface 312a and the second arc surface 312b are both quarter arc surfaces and are concentrically arranged, and the radius of the first arc surface 312a is smaller than that of the second arc surface 312 b. Thus, the two opposite surfaces of the first plate segment 311 are ensured to be smoothly transited to the first arc surface 312a and the second arc surface 312b, respectively, and simultaneously, the two opposite surfaces of the non-display region 310 are also smoothly transited to the first arc surface 312a and the second arc surface 312b, respectively.

Referring to fig. 6 and 8, in some embodiments, the non-display area 310 includes a first plate section 311 and a second plate section 313, one end of the second plate section 313 is connected to the display area 320, the second plate section 313 is coplanar with the display area 320, i.e., both are horizontally disposed, a top end of the first plate section 311 is disposed near the cover plate 100, and the first plate section 311 is perpendicular to both the display area 320 and the second plate section 313. In fact, the first and second plate segments 311 and 313 enclose the entire non-display area 310 into an L-shaped structure.

The housing 200 may be made of stainless steel, aluminum alloy, titanium alloy, glass material, or ceramic material. According to the requirement of actual situation, the housing 200 may be formed by a CNC process, or a blank of the housing 200 may be formed by punching, and then the blank of the housing 200 is formed into the finished housing 200 by the CNC process. The whole housing 200 can be formed in one step by die casting. Of course, the housing 200 may be formed in a separate manner, for example, one portion of the housing 200 is formed by stamping or die-casting, and another portion of the housing 200 is connected to the one portion by welding.

Referring to fig. 2 and 6, the mobile terminal 10 further includes an adhesive body 500, the adhesive body 500 is connected between the cover plate 100 and the housing 200, the adhesive body 500 may be a solid double-sided adhesive tape, or may also be a liquid glue, for example, the liquid glue is injected into a gap between the first mounting surface 210 of the housing 200 and the first unit surface 131 of the cover plate 100, and then the liquid glue is heated to be solidified into the solid adhesive body 500, so that the cover plate 100 and the housing 200 can also be connected.

Referring to fig. 2 and 6, of course, to improve the connection strength between the cover plate 100 and the housing 200, the mobile terminal 10 may further include a silk-screen glue layer 600, for example: the silk-screen adhesive layer 600 may be attached only on the first mounting surface 210, or the silk-screen adhesive layer 600 may be attached only on the first unit surface 131, or the silk-screen adhesive layer 600 may be attached on both the first mounting surface 210 and the first unit surface 131. When the silk-screen glue layer 600 is only attached to the first mounting surface 210, the adhesive body 500 is located between the first unit surface 131 and the silk-screen glue layer 600; when the silk-screen glue layer 600 is only attached to the first unit surface 131, the adhesive body 500 is located between the first mounting surface 210 and the silk-screen glue layer 600; when the silk-screen glue layers 600 are respectively attached to the first mounting surface 210 and the first unit surface 131, the adhesive body 500 is located between the two silk-screen glue layers 600.

The silk-screen glue layer 600 is formed by solidifying silk-screen glue, that is, glue is silk-screen printed on the cover plate 100 or the housing 200 by adopting a silk-screen process, and the silk-screen glue layer 600 after solidification forms an uneven connection structure, so that the glue body 500 and the silk-screen glue layer 600 are tightly combined to form an anchor bolt effect, and finally, the cover plate 100 and the housing 200 are tightly attached to each other, the cover plate 100 and the housing 200 are enabled to achieve the seamless connection effect, and the overall sense and the appearance quality of the whole mobile terminal 10 are improved.

In some embodiments, for example, the first mounting surface 210 and the first cell surface 131 may be subjected to a nanocrystallization process, i.e., a nano-micro pore structure is formed on the first mounting surface 210 and the first cell surface 131. In the installation process, the shell 200 and the cover plate 100 are placed in a mold, a molten plastic is injected into a gap formed between the first installation surface 210 and the first unit surface 131 by using an injection machine, the mold is opened after the molten plastic is solidified and molded, the solid plastic can also play a role in connecting the shell 200 and the cover plate 100, and the liquid plastic permeates into the nano micropores due to the arrangement of the nano micropores, so that the connection strength between the solid plastic and the shell 200 and the cover plate 100 is improved.

As used herein, a "terminal" includes, but is not limited to, a device that is configured to receive/transmit communication signals via a wireline connection, such as via a Public Switched Telephone Network (PSTN), a Digital Subscriber Line (DSL), a digital cable, a direct cable connection, and/or another data connection/network, and/or via a wireless interface (e.g., for a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter, and/or another communication terminal). Communication terminals arranged to communicate over a wireless interface may be referred to as "wireless communication terminals", "wireless terminals", and/or "mobile terminals". Examples of mobile terminals include, but are not limited to, satellite or cellular telephones; a Personal Communications System (PCS) terminal that may combine a cellular radiotelephone with data processing, facsimile and data communications capabilities; PDAs that may include radiotelephones, pagers, internet/intranet access, Web browsers, notepads, calendars, and/or Global Positioning System (GPS) receivers; and a conventional laptop and/or palmtop receiver or other electronic device including a radiotelephone transceiver

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 mobile terminal having a reference plane perpendicular to a thickness direction of the mobile terminal, the mobile terminal comprising:

a housing;

the cover plate comprises a binding surface, a first light-transmitting surface and a second light-transmitting surface, the binding surface is connected with the shell, the first light-transmitting surface is provided with a first end and a second end, the first end is connected with the binding surface, the second end is connected with the second light-transmitting surface, and the distance from the first light-transmitting surface to the binding surface is gradually increased from the first end to the second end;

the flexible display screen is arranged on the shell and provided with a luminous display area and a non-display area which is arranged at the edge of the display area and does not emit light; the non-display area is bent towards the cover plate relative to the display area and comprises a first flat plate section, and the first flat plate section is perpendicular to the display area; and

the reflecting layer is attached to and covers all the non-display area, and the reflecting layer is vertical to the display area;

incident light rays emitted by the flexible display screen form emergent light rays after passing through the first light-transmitting surface, the non-display area and the reflecting layer have vertical projection on the reference plane, and the intersection point of the reverse extension line of the emergent light rays and the vertical projection covers all the vertical projection.

2. The mobile terminal of claim 1, wherein the first light-transmitting surface is an arc-shaped curved surface, and the attaching surface and the second light-transmitting surface are parallel planes.

3. The mobile terminal of claim 1, wherein the first light-transmitting surface is an arc-shaped curved surface, the attaching surface comprises a first unit surface and a second unit surface, the first unit surface is connected between the first light-transmitting surface and the second unit surface, the second unit surface and the second light-transmitting surface are parallel planes, and an included angle between the first unit surface and the second unit surface is α, wherein 0 ° < α ≦ 90 °.

4. The mobile terminal of claim 1, wherein the housing has an outer surface recessed with a first mounting surface and a second mounting surface, the first mounting surface and the second mounting surface defining a step, and the cover is mounted on the step.

5. The mobile terminal of claim 1, wherein the non-display area comprises a bent segment that connects the first flat segment and the display area simultaneously.

6. The mobile terminal of claim 5, wherein the bending section comprises a first arc surface and a second arc surface which are opposite to each other, and the first arc surface is closer to the reflective layer than the second arc surface; the first arc surface and the second arc surface are both quarter arc surfaces which are concentrically arranged.

7. The mobile terminal of claim 1, wherein the non-display area comprises a second flat segment that connects the display area and the first flat segment simultaneously, the second flat segment being coplanar with the display area, the first flat segment being perpendicular to the second flat segment.

8. The mobile terminal of claim 1, further comprising a glue connected between the cover plate and the housing.

9. The mobile terminal of claim 8, further comprising a silk-screen glue layer, wherein the silk-screen glue layer is connected to the adhesive body, and the silk-screen glue layer is attached to at least one of the cover plate and the housing.

10. The mobile terminal according to any of claims 1 to 9, further comprising any of:

the reflecting layer is a mirror reflecting film, and the mirror reflecting film is made of a silver material, a gold material or an aluminum material;

the reflection layer is an antireflection film, and the antireflection film is made of an aluminum oxide material, a titanium oxide material or an aluminum nitride material.

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