Light-transmitting assembly, camera module and electronic equipment

Abstract

The invention discloses a light-transmitting assembly, a camera module and electronic equipment, the light-transmitting assembly comprises a light-transmitting base material, an ink layer and an antireflection film, and the light-transmitting base material is provided with an incident surface and an emergent surface. The ink layer is arranged on the circumferential edge of the incident surface and / or the circumferential edge of the emergent surface, the antireflection film is arranged on the ink layer, and the ink layer is located between the light-transmitting base material and the antireflection film.

Description

Technical Field

[0001] The present application relates to the technical field of camera modules, and in particular to a light-transmitting component, a camera module and an electronic device. Background Art

[0002] The periscope lens was developed to create a thinner digital camera with optical zoom. The depth required for the zoom lens is converted into a vertical or horizontal position to achieve the purpose of reducing the thickness of the body.

[0003] The periscope lens in the related art has shortcomings in imaging quality. In the prism module, the surface of the prism is coated with an anti-reflection film, and then a layer of ink is silk-screened on the surface of the film. The ink serves to block light. In the ink surface test, the reflectivity of the prism module is low, but the reflectivity of the substrate surface inside the prism module is high, resulting in the risk of stray light and affecting the imaging effect. Summary of the invention

[0004] The present application aims to provide a light-transmitting component, a camera module and an electronic device, which at least solve the problem in the related art that periscope lenses have the risk of stray light, which affects the imaging effect.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a light-transmitting component, including:

[0007] A light-transmitting substrate having an incident surface and an exit surface;

[0008] An ink layer, provided on the peripheral edge of the incident surface and / or the peripheral edge of the exit surface;

[0009] The anti-reflection film is arranged on the ink layer, and the ink layer is located between the light-transmitting substrate and the anti-reflection film.

[0010] In a second aspect, an embodiment of the present application provides a camera module, including:

[0011] As the light-transmitting component in the first aspect.

[0012] In a third aspect, an embodiment of the present application provides an electronic device, including:

[0013] Such as the camera module in the second aspect.

[0014] In an embodiment of the present application, a solution is provided for improving the internal reflectivity of a light-transmitting component. In the related art, the light-transmitting component is a structure in which a substrate, a film layer, and an ink are stacked in sequence, and the external reflectivity is the reflectivity of the ink. The internal reflectivity is the equivalent reflectivity of the substrate, the ink, and the film layer. In the present embodiment, the stacked structure of the light-transmitting component is a light-transmitting substrate, an ink layer, and an anti-reflection film. At this time, the external reflectivity is the equivalent reflection of the ink layer and the anti-reflection film, and the internal reflectivity is the equivalent reflectivity of the light-transmitting substrate and the ink layer. Actual tests show that the equivalent reflectivity of the light-transmitting substrate and the ink layer in the present embodiment is lower than the equivalent reflectivity of the substrate, the ink, and the film layer in the related art, thereby achieving a photographic effect of improving stray light.

[0015] In this embodiment, the stacking structure sequence is to first apply an ink layer on the circumferential edge of the light-transmitting substrate, and then plate an anti-reflection film on the surface of the ink structure. In this embodiment, the internal reflectivity of the light-transmitting component is equivalent to the reflectivity of the ink layer + the light-transmitting substrate, which can reduce the internal reflectivity of the light-transmitting component, thereby avoiding the risk of stray light and ensuring the imaging effect of the camera module.

[0016] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1 is a schematic structural diagram of a light-transmitting component according to an embodiment of the present application;

[0019] Figure 2 is a schematic structural diagram of a camera module according to an embodiment of the present application;

[0020] Figure 3 is a schematic structural diagram of a prism according to an embodiment of the present application;

[0021] Figure 4 A graph showing the variation of the internal reflectivity of a light-transmitting component with wavelength in the related art is shown;

[0022] Figure 5 A curve diagram showing the change of external reflectivity of a light-transmitting component with wavelength in the related art is shown;

[0023] Figure 6 A curve diagram showing the variation of the internal reflectivity of the light-transmitting component with the wavelength in the embodiment of the present application is shown;

[0024] Figure 7 A curve diagram showing the change of the external reflectivity of the light-transmitting component with the wavelength in the embodiment of the present application is shown;

[0025] Figure 8 A schematic diagram showing the principle of thin film interference;

[0026] Fig. 9 A schematic diagram showing the variation of amplitude with optical path length is shown.

[0027] Reference numerals:

[0028] 100 light-transmitting component, 110 light-transmitting substrate, 111 prism, 112 lens, 120 ink layer, 121 incident surface, 122 exit surface, 123 reflection surface, 130 anti-reflection film, 200 photosensitive chip, 300 housing. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0030] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0031] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Combine the following Figure 1-Figure 9 Describe the light-transmitting component, camera module and electronic device according to the embodiments of the present application.

[0033] Combination Figure 1 and Figure 2As shown, according to some embodiments of the present application, the light-transmitting component 100 includes: a light-transmitting substrate 110, an ink layer 120 and an anti-reflection film 130, and the light-transmitting substrate 110 has an incident surface 121 and an exit surface 122. The ink layer 120 is disposed on the circumferential edge (the arrow at c1) of the incident surface 121 and / or the circumferential edge (the arrow at c2) of the exit surface 122, and the anti-reflection film 130 is disposed on the ink layer 120, and the ink layer 120 is located between the light-transmitting substrate 110 and the anti-reflection film 130.

[0034] The light-transmitting substrate 110 is light-transmitting, and light can pass through the light-transmitting substrate 110 . Specifically, the light enters the light-transmitting substrate 110 from the incident surface 121 and is emitted from the emission surface 122 .

[0035] The ink layer 120 may be disposed on the circumferential edge of the incident surface 121 or the circumferential edge of the exit surface 122 , or the ink layer 120 may be disposed on the circumferential edge of both the incident surface 121 and the exit surface 122 , and then an anti-reflection film 130 may be plated on the surface of the ink structure.

[0036] The present embodiment provides a solution for improving the internal reflectivity of the light-transmitting component 100. In the related art, the light-transmitting component 100 is a structure in which a substrate, a film layer, and an ink are stacked in sequence, and the external reflectivity is the reflectivity of the ink. The internal reflectivity is the equivalent reflectivity of the substrate, the ink, and the film layer. In the present embodiment, the stacked structure of the light-transmitting component 100 is a light-transmitting substrate 110, an ink layer 120, and an anti-reflection film 130. At this time, the external reflectivity is the equivalent reflection of the ink layer 120 and the anti-reflection film 130, and the internal reflectivity is the equivalent reflectivity of the light-transmitting substrate 110 and the ink layer 120. It can be seen from actual tests that the equivalent reflectivity of the light-transmitting substrate 110 and the ink layer 120 in the present embodiment is lower than the equivalent reflectivity of the substrate, the ink, and the film layer in the related art, thereby achieving a photographic effect of improving stray light.

[0037] In this embodiment, the stacking structure sequence is to first apply the ink layer 120 on the circumferential edge of the light-transmitting substrate 110, and then plate the anti-reflection film 130 on the surface of the ink structure. In this embodiment, the internal reflectivity of the light-transmitting component 100 is equivalent to the reflectivity of the ink layer 120 + the light-transmitting substrate 110, which can reduce the internal reflectivity of the light-transmitting component 100, thereby avoiding the risk of stray light and ensuring the imaging effect of the camera module.

[0038] The processing technology of the ink layer 120 can be silk screen printing, spraying, dipping, and pad printing. In the above embodiment, the reflectivity of the ink layer 120 itself is less than 1%. In other embodiments, the ink layer 120 is not limited to the above reflectivity. The reflectivity of the ink layer 120 is lower than the reflectivity of the transparent substrate 110.

[0039] The solution for reducing the internal reflectivity can be implemented on the incident surface 121 or on the exit surface 122. The light can be reflected to the prism 111 by the photosensitive chip or the lens 112, which can improve the reflection of the light to the incident surface 121 or the exit surface 122 of the prism 111 and reduce the reflectivity.

[0040] The main function of the anti-reflection film 130 is to reduce the external reflectivity. If the anti-reflection film 130 is not used, the external reflectivity is the reflectivity of the ink layer 120. With the anti-reflection film 130, the external reflectivity is the equivalent reflectivity of the ink layer 120 and the anti-reflection film 130. The reflectivity will be lowered, which is beneficial to improve the transmittance of the prism 111.

[0041] The principle of reducing the reflectivity by coating the anti-reflection film 130 on the surface of the ink layer 120: the ink absorption rate is close to 100%, and the ink itself has a reflectivity of about 2%. The reason for this reflectivity is that the refractive index of the ink and the air is different, and the reflectivity is generated after the light interferes. Plating the anti-reflection film 130 on the surface of the ink layer 120 will make the refractive index of the air and the anti-reflection film 130 close, reduce the interference effect, and thus reduce the surface reflectivity of the ink layer 120. When the reflectivity is reduced, the generated light is absorbed by the ink.

[0042] Thin film interference principle: When light propagates in a light radiating medium, when light is emitted from one medium into another, part of the light will be reflected and part of the light will be refracted. Both the reflected light and the refracted light are formed by the superposition of coherent waves of the light waves. When these two parts meet again at the interface, they will interfere according to the coherence principle. Figure 8 In the equation, W3 is the incident light, W1 is the reflected light, W2 is the reflection at interface 2 after passing through interface 1, n0 is the refractive index of air, n1 is the refractive index of interface 1, and n2 is the refractive index of interface 2. Fig. 9 As shown, if the amplitudes of the two reflected lights are equal, the interference will be destructive, and λ is used to represent the wavelength.

[0043] Combination Figure 1 and Figure 2 As shown, in some embodiments, optionally, the light-transmitting substrate 110 includes: a prism 111 and / or a lens 112 .

[0044] The light-transmitting substrate 110 may be a prism 111. The prism 111 is a transparent object formed by two planes intersecting each other but not parallel to each other. It is used to split light or disperse a light beam. It is a polyhedron made of transparent material. In the periscope camera module, the prism 111 reflects light to the lens 112.

[0045] By sequentially stacking the ink layer 120 and the anti-reflection film 130 on the prism 111 , the internal reflectivity of the prism 111 can be reduced, thereby reducing the risk of stray light.

[0046] According to the method of coating first and then ink coating in the related art, the internal reflectivity of the prism 111 is about 3.5%, which can be referred to Figure 4 After the improvement to the scheme of first ink coating and then coating, the internal reflectivity of the prism 111 is about 0.7%, referring to Figure 6 As shown, the larger the internal reflectivity, the smaller the difference in the external reflectivity of the ink. Figure 5 , is the external reflectivity of the ink before improvement, about 0.4%. Figure 7 The improved ink external reflectivity is about 0.6%. The above diagram in this embodiment shows the reflectivity of one of the ink specifications. If there is an ink with a lower reflectivity, the internal reflectivity of the ink can be reduced further. The main components of the ink are special polymer resin series inks, including epoxy resin, organic solvent, colorant, defoamer, etc. The ink is an insulator. The resin is acrylic resin, the toner is an inorganic pigment, and the additive is silicone, which is one of the ink materials.

[0047] The application of this embodiment is not limited to the structure of the prism 111, but is applicable to periscope prisms 111 of other structural forms. The structure of this embodiment and the solution for reducing the internal reflectivity can be used on the lens of the lens 112. The edge of any lens of the lens 112 is coated with ink and then coated to improve the stray light effect inside the lens 112. It is not limited according to the needs, and the above is only an exemplary embodiment of this embodiment.

[0048] In some embodiments, optionally, when the light-transmitting substrate 110 includes a prism 111 , the prism 111 includes: a glass prism or a plastic prism.

[0049] The prism 111 can be made of glass, plastic or other materials. The glass substrate and refractive index are not limited. The prism 111 can be made of lanthanum optical glass, heavy flint optical glass, low softening point optical glass or the like.

[0050] The processing technology of the prism 111 can be cold processing, grinding and polishing, or compression molding.

[0051] like Figure 3 As shown, in some embodiments, optionally, the prism 111 further has a reflective surface 123, and the light incident into the light-transmitting substrate 110 is reflected by the reflective surface 123 to the exit surface 122; the reflective surface 123 includes a total reflection surface; or the reflective surface 123 includes a non-total reflection surface, and a reflective medium film and / or a reflective metal film is provided on the non-total reflection surface.

[0052] The reflecting surface 123 in the prism 111 is an inclined surface, which can be a total reflection surface or a non-total reflection surface. The non-total reflection surface needs to be plated with a dielectric film or a dielectric film plus a metal film. The metal film can be a silver or aluminum film to increase the reflectivity.

[0053] In some embodiments, optionally, when the light-transmitting substrate 110 includes a prism 111 , the prism 111 includes a right-angle prism or a cemented prism.

[0054] This embodiment of Figure 3 The prism 111 is a right angle prism. The prism 111 is not limited to Figure 3 As shown, the above-mentioned solution for reducing the internal reflectivity can also be applied to cemented prisms, focal prisms 111, etc.

[0055] like Figure 1 As shown, in some embodiments, optionally, the first side of the ink layer 120 faces the light-transmitting substrate 110 , the second side of the ink layer 120 faces the anti-reflection film 130 , and the friction coefficient of the first side of the ink layer 120 is smaller than the friction coefficient of the second side of the ink layer 120 .

[0056] The surface of the ink layer 120 may be roughened so that the surface of the ink layer 120 facing the anti-reflection film 130 is relatively rough, which is beneficial to improving the adhesion of the anti-reflection film 130 to the surface of the ink layer 120 and improving the adhesion effect of the anti-reflection film 130. Moreover, by making the surface of the ink layer 120 rougher, the internal reflectivity of the light-transmitting component 100 can be further reduced, and the stray light effect can be changed.

[0057] In one possible application, if a lower internal reflectivity is required, low-energy ion bombardment can be performed after the ink layer 120 is stacked on the prism 111. After the surface of the ink layer 120 is roughened, the adhesion of the coating can be increased, while the reflectivity can be reduced, the stray light effect can be improved, and a darker visual effect can be achieved.

[0058] like Figure 1 As shown, in some embodiments, optionally, the thickness W of the ink layer 120 satisfies, 5um≤W≤8um.

[0059] When the thickness of the ink layer 120 is small, the thickness of the ink layer 120 is thin, resulting in a reduced light shielding effect of the ink layer 120. When the thickness of the ink layer 120 is large, the ink layer 120 occupies a large space in the thickness direction. In this embodiment, the thickness of the ink layer 120 is limited to between 5um and 8um, which can ensure the light shielding effect of the ink layer 120 and avoid the problem of stray light. It can also reduce the space of the ink layer 120 in the thickness direction, which is conducive to improving the space utilization inside the camera module.

[0060] Exemplarily, the thickness W of the ink layer may be 5 um, 6 um or 8 um.

[0061] In a possible application, the processing size error of the ink layer 120 is generally about ±30 um.

[0062] In some embodiments, optionally, the components of the antireflection film 130 include at least one of the following:

[0063] Titanium pentoxide, tantalum pentoxide, a mixture of lanthanum oxide and titanium dioxide, silicon dioxide and magnesium difluoride.

[0064] In this embodiment, the coating material of the antireflection film 130 has a high refractive index of titanium pentoxide, tantalum pentoxide, a mixture of lanthanum oxide and titanium dioxide, and a high refractive index of silicon dioxide, magnesium difluoride and the like.

[0065] In an embodiment of the present application, a camera module is proposed, including the light-transmitting component in any of the above embodiments. The camera module in this embodiment can achieve the technical effects of the light-transmitting component in any of the above embodiments, which will not be repeated here.

[0066] The camera module also includes: a shell 300 and a photosensitive chip 200 . The prism 111 , the lens 112 and the photosensitive chip 200 are located in the shell 300 . External light passes through the prism 111 and the lens 112 and then irradiates the photosensitive chip 200 .

[0067] In an embodiment of the present application, an electronic device is proposed, including the camera module in the above embodiment. The electronic device in this embodiment can achieve the technical effect of the camera module in any of the above embodiments, which will not be repeated here.

[0068] The electronic device may be a mobile phone, tablet computer, laptop computer, e-book, smart wearable device, etc.

[0069] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A light-transmitting component, characterized in that: include: A light-transmitting substrate having an incident surface and an exit surface; An ink layer, provided on the peripheral edge of the incident surface and / or the peripheral edge of the exit surface; The anti-reflection film is arranged on the ink layer, and the ink layer is located between the light-transmitting substrate and the anti-reflection film.

2. The light-transmitting component according to claim 1, characterized in that: The light-transmitting substrate comprises: Prisms and / or lenses.

3. The light-transmitting component according to claim 1, characterized in that: In the case where the light-transmitting substrate includes a prism, the prism includes: Glass prism or plastic prism.

4. The light-transmitting component according to claim 3, characterized in that: The prism also has a reflective surface, and the light incident into the light-transmitting substrate is reflected to the exit surface through the reflective surface; The reflecting surface comprises a total reflecting surface; or The reflective surface comprises a non-total reflective surface, on which a reflective medium film and / or a reflective metal film is disposed.

5. The light-transmitting component according to any one of claims 1 to 4, characterized in that: In the case where the light-transmitting substrate includes a prism, the prism includes a right-angle prism or a cemented prism.

6. The light-transmitting component according to any one of claims 1 to 4, characterized in that: The first side of the ink layer faces the light-transmitting substrate, the second side of the ink layer faces the anti-reflection film, and the friction coefficient of the first side of the ink layer is smaller than the friction coefficient of the second side of the ink layer.

7. The light-transmitting component according to any one of claims 1 to 4, characterized in that: The thickness W of the ink layer satisfies 5um≤W≤8um.

8. The light-transmitting component according to any one of claims 1 to 4, characterized in that: The components of the antireflection film include at least one of the following: Titanium pentoxide, tantalum pentoxide, a mixture of lanthanum oxide and titanium dioxide, silicon dioxide and magnesium difluoride.

9. A camera module, characterized in that: include: A light-transmitting component as claimed in any one of claims 1 to 8.

10. An electronic device, characterized in that: include: The camera module as described in claim 9.

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