Camera module and electronic devices

Abstract

A camera module and electronic device are disclosed. The camera module includes an imaging lens and an image sensor, wherein the image sensor is located on the image side of the imaging lens. The imaging lens has an optical axis and includes a plastic lens barrel and a plurality of plastic lenses disposed within the plastic lens barrel. The plastic lens barrel includes an object-end outer surface, a minimum aperture of the lens barrel, an object-end outer bevel, and a reverse bevel. The object-end outer surface is the surface of the plastic lens barrel facing the object side and closest to the object side, and is annular. The object-end outer bevel tapers from the object-end outer surface towards the minimum aperture of the lens barrel. The reverse bevel gradually expands from the minimum aperture of the lens barrel towards the image side, wherein the connection between the reverse bevel and the object-end outer bevel surrounds to form the minimum aperture of the lens barrel. Under certain conditions, the structural configuration of the plastic lens barrel can maintain manufacturing quality and eliminate stray light.

Description

[0001] This application is a divisional application of the patent application filed on November 28, 2019, with application number 201911186799.7 and title "Camera Module and Electronic Device". Technical Field

[0002] This disclosure relates to a camera module, and more particularly to a camera module used in portable electronic devices. Background Technology

[0003] In most common camera modules, a protective glass is usually placed between the imaging lens and the subject. Since there is an air gap between the protective glass and the imaging lens, when the strong light source of the subject causes stray light, the effect of stray light can be reduced by setting a means to reduce reflection inside the imaging lens.

[0004] However, when the camera module is placed in a common electronic device with photographic function, the display screen with a light-transmitting material is placed between the imaging lens and the subject. The display screen has a backlight panel, and its light source is closer to the imaging lens than the strong light source of the subject. This not only makes it easier to affect the image quality, but also makes it impossible to eliminate the influence of stray light by setting a means to reduce reflection inside the imaging lens.

[0005] Therefore, developing a camera module that effectively eliminates stray light, has good image quality, and can be miniaturized for use in electronic devices has become an important and urgent problem for the industry. Summary of the Invention

[0006] This disclosure provides a camera module and electronic device in which manufacturing quality is maintained and stray light is eliminated through the structural configuration of the plastic lens barrel therein.

[0007] According to another embodiment of the present disclosure, a camera module is provided, including an imaging lens and an image sensor, wherein the image sensor is located on the image side of the imaging lens. The imaging lens has an optical axis and includes a plastic lens barrel, a plurality of plastic lenses, and a light shield, wherein the plastic lenses are disposed within the plastic lens barrel. The plastic lens barrel includes an object-side outer surface, a minimum barrel aperture, a reverse inclined surface, and an object-side outer inclined surface. The object-side outer surface is a surface of the plastic lens barrel facing the object side and closest to the object side, and is annular. The minimum barrel aperture is surrounded by the object-side outer surface. The reverse inclined surface gradually expands from the minimum barrel aperture toward the image side. The object-side outer inclined surface tapers from the object-side outer surface toward the minimum barrel aperture. The light shield is disposed within the plastic lens barrel and is located between the minimum barrel aperture and the object-side peripheral portion of the plastic lens closest to the object side. The number of plastic lenses is N, the distance between the minimum barrel aperture and the object-side outer surface in the direction parallel to the optical axis is h, and the principal ray angle between the principal imaging ray corresponding to the 1.0F image height of the imaging lens and the image sensor is CRA 1.0F, which satisfies the following conditions: 4 ≤ N ≤ 10; 0.01 mm < h < 0.15 mm; and CRA 1.0F > 25.0 degrees. The connection between the reverse inclined surface and the object-side outer inclined surface surrounds and forms the minimum barrel aperture.

[0008] For the camera module according to the embodiment described in the previous paragraph, the distance between the minimum barrel aperture and the light shield in the direction parallel to the optical axis is d, which satisfies the following conditions: 0.12 mm < d < 0.4 mm.

[0009] For the camera module according to the embodiment described in the previous paragraph, the reverse inclined surface includes a plurality of straight strip structures extending from the minimum barrel aperture in a direction perpendicular to the optical axis.

[0010] According to another embodiment of the present disclosure, an electronic device is provided, including the camera module according to the foregoing embodiment and a surface flat plate, wherein the surface flat plate is disposed on the object side of the camera module, and the surface flat plate is a flat plate having a display function module.

[0011] For the electronic device according to the embodiment described in the previous paragraph, the distance between the object-side outer surface and the surface flat plate in the direction parallel to the optical axis is g, which satisfies the following conditions: 0.03 mm < g < 0.3 mm. Additionally, it satisfies the following conditions: 0.03 mm < g < 0.26 mm. <​According to another embodiment of the present disclosure, an electronic device is provided, which includes a camera module and a surface flat panel. The surface flat panel is a flat panel with a display function module. The camera module includes an imaging lens and an image sensor. The image sensor is located on the image side of the imaging lens, and the surface flat panel is located on the object side of the imaging lens. The imaging lens has an optical axis and includes a plastic lens barrel and a plurality of plastic lenses, and the plastic lenses are disposed in the plastic lens barrel. The plastic lens barrel includes an object end outer surface, a minimum barrel opening, an inclined surface, and an object end outer inclined surface. The object end outer surface is a surface of the plastic lens barrel facing the object side and closest to the object side, and is annular. The minimum barrel opening is surrounded by the object end outer surface. The inclined surface gradually expands from the minimum barrel opening toward the image side. The object end outer inclined surface tapers from the object end outer surface toward the minimum barrel opening, and the connection between the inclined surface and the object end outer inclined surface surrounds to form the minimum barrel opening. The number of plastic lenses is N, the distance between the minimum barrel opening and the object end outer surface in the direction parallel to the optical axis is h, and the principal ray angle between a principal imaging ray corresponding to 1.0F image height of the imaging lens and the image sensor is CRA 1.0F, which satisfies the following conditions: 4 ≤ N ≤ 10; 0.01 mm < h < 0.15 mm; and CRA 1.0F > 25.0 degrees.

[0013] For the camera module according to the embodiment described in the previous paragraph, the distance between the object end outer surface and the surface flat panel in the direction parallel to the optical axis is g, which satisfies the following conditions: 0.03 mm < g < 0.3 mm.

[0014] For the camera module according to the embodiment described in the previous paragraph, the distance between the object end outer surface and the surface flat panel in the direction parallel to the optical axis is g, which satisfies the following conditions: 0.03 mm < g < 0.26 mm.

[0015] For the camera module according to the embodiment described in the previous paragraph, the inclined surface includes a plurality of straight strip structures extending from the minimum barrel opening in the direction perpendicular to the optical axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A A schematic diagram showing an electronic device according to the first embodiment of the present disclosure; <000​​​​​​​​​​​​​​​​​

[0020] Figure 1E Drawing according to Figure 1A A schematic diagram of the plastic lens barrel in the first embodiment;

[0021] Figure 1F Drawing according to Figure 1A A three-dimensional schematic diagram of the plastic lens barrel in the first embodiment;

[0022] Figure 1G Drawing according to Figure 1A A schematic diagram of parameters h and d in the first embodiment;

[0023] Figure 1H Drawing according to Figure 1A A schematic diagram of parameter θ in the first embodiment;

[0024] Figure 1I Drawing according to Figure 1A A schematic diagram of parameters ψD, ψED and ψs1 in the first embodiment;

[0025] Figure 2A A schematic diagram illustrating the surface plate and camera module of the electronic device according to the second embodiment of this disclosure;

[0026] Figure 2B Drawing according to Figure 2A Another schematic diagram of the surface plate and camera module in the second embodiment;

[0027] Figure 2C Drawing according to Figure 2A Another schematic diagram of the surface plate and camera module in the second embodiment;

[0028] Figure 2D Drawing according to Figure 2A A schematic diagram of parameters h and d in the second embodiment;

[0029] Figure 2E Drawing according to Figure 2A A schematic diagram of parameter θ in the second embodiment;

[0030] Figure 2F Drawing according to Figure 2A A schematic diagram of parameters ψD, ψED and ψs1 in the second embodiment;

[0031] Figure 3A A schematic diagram illustrating the surface plate and camera module of the electronic device according to the third embodiment of this disclosure;

[0032] Figure 3B Drawing according to Figure 3A A schematic diagram of parameters h and d in the third embodiment;

[0033] Figure 3C Drawing according to Figure 3AA schematic diagram of parameter θ in the third embodiment;

[0034] Figure 3D Drawing according to Figure 3A A schematic diagram of parameters ψD, ψED and ψs1 in the third embodiment;

[0035] Figure 4A A schematic diagram illustrating the surface plate and camera module of the electronic device according to the fourth embodiment of this disclosure;

[0036] Figure 4B Drawing according to Figure 4A Exploded view of the imaging lens in the fourth embodiment;

[0037] Figure 4C Drawing according to Figure 4A A three-dimensional schematic diagram of the plastic lens barrel in the fourth embodiment;

[0038] Figure 4D Drawing according to Figure 4A A schematic diagram of parameters ψD, ψED and d in the fourth embodiment;

[0039] Figure 4E Drawing according to Figure 4A A schematic diagram of parameter θ in the fourth embodiment; and

[0040] Figure 4F Drawing according to Figure 4A A schematic diagram of parameters h and ψs1 in the fourth embodiment.

[0041] [Symbol Explanation]

[0042] Electronic devices: 10

[0043] Camera modules: 11, 21, 31, 41

[0044] Surface flat plates: 12, 22, 32, 42

[0045] Surface glass: 121, 221, 321, 421

[0046] Backlight boards: 122, 222, 322, 422

[0047] Opening: 1221

[0048] Plastic lens barrels: 111, 211, 311, 411

[0049] External surface of the object end: 1111, 2111, 3111, 4111

[0050] External bevel at object end: 1112, 2112, 3112, 4112

[0051] Minimum aperture of the lens barrel: 1113, 2113, 3113, 4113

[0052] Back bevel: 1114, 2114, 3114, 4114

[0053] First plastic lens: 1121, 2121, 3121, 4121

[0054] Second plastic lens: 1122, 2122, 3122, 4122

[0055] Third plastic lens: 1123, 2123, 3123, 4123

[0056] Fourth plastic lens: 1124, 2124, 3124, 4124

[0057] Fifth plastic lens: 1125, 2125, 3125, 4125

[0058] Light-blocking plates: 1131, 1132, 1133, 2131, 2132, 2133, 3131, 3132, 3133, 4131, 4132, 4133

[0059] Spacer rings: 1134, 1135, 2134, 2135, 3134, 3135, 4134, 4135

[0060] Retaining rings: 1136, 2136, 3136, 4136

[0061] Imaging planes: 113, 213, 313, 413

[0062] Image sensors: 114, 214, 314, 414

[0063] Optical axis: X

[0064] h: The distance between the minimum opening of the lens barrel and the outer surface of the object end in the direction parallel to the optical axis.

[0065] d: The distance between the minimum opening of the lens barrel and the light shield in the direction parallel to the optical axis.

[0066] θ: The angle between the first and second conical surfaces through a section line passing through the optical axis.

[0067] ψD: Maximum outer diameter of the outer surface of the object end

[0068] ψED: Diameter of the minimum opening of the microscope tube

[0069] ψs1: Diameter of the opening of the light-shielding plate

[0070] g: Distance between the outer surface of the object end and the surface plate in the direction parallel to the optical axis X. Detailed Implementation Manner

[0071] The present disclosure provides a camera module, including an imaging lens and an image sensor. The image sensor is located on the image side of the imaging lens. The imaging lens has an optical axis and includes a plastic lens barrel and a plurality of plastic lenses, and the plastic lenses are disposed within the plastic lens barrel. The plastic lens barrel includes an object-side outer surface, a minimum barrel aperture, an object-side outer inclined surface, and a reverse inclined surface. The object-side outer surface is the surface of the plastic lens barrel facing the object side and closest to the object side, and is annular. The object-side outer inclined surface tapers from the object-side outer surface towards the minimum barrel aperture. The reverse inclined surface gradually expands from the minimum barrel aperture towards the image side, and the connection between the reverse inclined surface and the object-side outer inclined surface forms the minimum barrel aperture in a surrounding manner. The number of plastic lenses is N, the maximum outer diameter of the object-side outer surface is ψD, the distance between the minimum barrel aperture and the object-side outer surface in the direction parallel to the optical axis is h, and the principal ray angle between a principal imaging ray corresponding to 1.0F image height of the imaging lens and the image sensor is CRA 1.0F, which satisfies the following conditions: 4 ≤ N ≤ 10; 0.8 mm < ψD ≤ 3.4 mm; 0.01 mm < h < 0.15 mm; and CRA 1.0F > 25.0 degrees. By controlling the maximum outer diameter ψD of the object-side outer surface within a suitable range, the configuration of the minimum barrel aperture can be closer to the object-side outer surface, reducing the possible redundant reflections between the object-side outer surface and the surface flat plate. On the other hand, keeping h within a specific range can maintain the dimensional stability of injection molding and the manufacturing quality of the minimum barrel aperture. Furthermore, the configuration of the object-side outer inclined surface and the reverse inclined surface makes it difficult for the minimum barrel aperture to cause additional unexpected light reflection situations, effectively eliminating the stray light phenomenon that easily occurs in camera modules with a CRA greater than a specific angle. The larger CRA makes the stray light paths near the minimum barrel aperture more consistent, making the design configuration of the reverse inclined surface and h more efficient in eliminating stray light.

[0072] In addition, the larger CRA can make the imaging lens have an exit pupil position and a principal point closer to the image sensor, effectively shortening the back focal length of the imaging lens, and more contributing to maintaining the miniaturization development feasibility under the trend of increasing the number of lenses. Looking at the prior art, for example, the CRA of an endoscope is relatively small, and the number of lenses also remains small, making it less able to fully utilize the characteristics of a large CRA. On the other hand, most imaging lenses with a large CRA are difficult to meet miniaturization due to their large volume and imaging surface area, so it is relatively difficult to be implemented on portable electronic devices.

[0073] The imaging lens may further include a light shield disposed within the plastic lens barrel and located between the minimum aperture of the lens barrel and the object-side peripheral portion of the plastic lens closest to the object side. The design of the anti-inclined surface makes the minimum aperture of the lens barrel closer to the object side than the anti-inclined surface, enabling non-imaging light from a larger incident angle to more easily enter the anti-inclined surface, making the path of the non-imaging light easier to control, so as to further design a suitable light shield to achieve the maximum shielding efficiency.

[0074] The distance between the minimum aperture of the lens barrel and the light shield in the direction parallel to the optical axis is d, which satisfies the following condition: 0.10 mm < d < 0.4 mm. Thereby, the light shield and the anti-inclined surface have better shielding efficiency and can cope with an environment with higher stray light intensity. Additionally, the following condition can be satisfied: 0.12 mm < d < 0.4 mm.

[0075] The distance between the minimum aperture of the lens barrel and the light shield in the direction parallel to the optical axis is d, and the distance between the minimum aperture of the lens barrel and the outer surface of the object end in the direction parallel to the optical axis is h, which satisfies the following condition: 1.0 < d / h < 15.0. Thereby, the anti-inclined surface and the light shield can capture more stray light.

[0076] The maximum outer diameter of the outer surface of the object end is ψD, which satisfies the following condition: 1.0 mm < ψD < 2.8 mm. Thereby, the manufacturability of injection molding can be maintained, and when the minimum aperture of the lens barrel is extrapolated towards the outer surface of the object end, the lens barrel molding quality has good dimensional accuracy.

[0077] The anti-inclined surface may include a plurality of straight strip structures extending in a direction perpendicular to the optical axis from the minimum aperture of the lens barrel. Specifically, the straight strip structures may be disposed on the surface of the anti-inclined surface, which can increase the efficiency of the anti-inclined surface in eliminating high-intensity non-imaging light, is suitable for miniaturized imaging lenses, and can further eliminate the reflection situation that occurs when a large amount of stray light is received on the surface of the light shield itself.

[0078] The diameter of the minimum aperture of the lens barrel is ψED, and the aperture diameter of the light shield is ψs1, which satisfies the following condition: 0.8 ≤ ψED / ψs1 ≤ 1.05. Thereby, the shielding range of the light shield is increased without affecting the resolution quality and optical specification performance of the imaging lens. Additionally, the following condition can be satisfied: 0.8 ≤ ψED / ψs1 ≤ 1.0. Thereby, the situation of surface reflection occurring at the aperture of the light shield itself can be further reduced.

[0079] The outer inclined surface of the object side can be a first conical surface, and the anti-inclined surface can be a second conical surface. The included angles between the first conical surface and the second conical surface and a section line of the optical axis are θ, which satisfy the following condition: 45 degrees < θ < 120 degrees. Thereby, the probability of surface reflection between the outer inclined surface of the object side and the anti-inclined surface can be reduced, and its processing feasibility can be maintained. Specifically, the processing feasibility can be that processing means such as surface atomization and cutting processing are applied to the corresponding forming die of the above-mentioned part, so that the above two parts after forming have better stray light elimination ability.

[0080] Each technical feature in the camera module of the above disclosure content can be combined and configured to achieve the corresponding effects.

[0081] The present disclosure provides an electronic device, which can be an electronic device with a photographing function. The electronic device includes the aforementioned camera module and a surface flat plate, wherein the surface flat plate is disposed on the object side of the camera module. The distance between the outer surface of the object side and the surface flat plate in the direction parallel to the optical axis is g, which satisfies the following condition: 0.03 mm < g < 0.3 mm. Thereby, stray light is prevented from entering the imaging lens through an unexpected path, and the h technical feature of the minimum opening of the lens barrel can shield the high-intensity light source earlier, so that the subsequent attenuated stray light can be easily handled by other means of shielding stray light inside the lens. In addition, the following condition can be satisfied: 0.03 mm < g < 0.26 mm.

[0082] ]>In addition, the surface flat plate can be a flat plate with a display function module. Specifically, the surface flat plate can be a display screen, which can include a surface glass and a backlight board, but is not limited thereto.

[0083] <First Embodiment>

[0084] Figure 1A The schematic diagram of the electronic device 10 in the first embodiment according to the present disclosure content is shown. From Figure 1A it can be seen that the electronic device 10 is a mobile phone and is a full-screen mobile phone, but the present disclosure content is not limited thereto. The electronic device 10 includes a camera module 11 and a surface flat plate 12, wherein the surface flat plate 12 is disposed on the object side of the camera module 11.

[0085] Specifically, Figure 1B The schematic diagram of the surface flat plate 12 in the first embodiment is shown. Figure 1A The schematic diagram of the surface flat plate 12 and the camera module 11 in the first embodiment is shown. Figure 1C The schematic diagram of the surface flat plate 12 and the camera module 11 in the first embodiment is shown. Figure 1A The schematic diagram of the surface flat plate 12 and the camera module 11 in the first embodiment is shown. Figure 1D The schematic diagram of the surface flat plate 12 and the camera module 11 in the first embodiment is shown. Figure 1AAnother schematic diagram of the surface plate 12 and camera module 11 in the first embodiment. As shown in Figures 1B, 1C, and 1D, the surface plate 12 can be a plate with a display function module, which may include a surface glass 121 and a backlight plate 122, wherein the backlight plate 122 is connected to the image-side surface of the surface glass 121. The surface glass 121 may be a glass substrate, and the backlight plate 122 may be an LED as the light source of the array, but the present disclosure is not limited thereto. The camera module 11 includes an imaging lens (not otherwise labeled) and an image sensor 114, wherein the image sensor 114 is located on the image side (i.e., on the imaging surface 113) of the imaging lens, and the surface plate 12 is located on the object side of the imaging lens.

[0086] The imaging lens includes a plastic lens barrel 111 and a plurality of plastic lenses, wherein the plastic lenses are disposed within the plastic lens barrel 111 and, from the object side to the image side, are a first plastic lens 1121, a second plastic lens 1122, a third plastic lens 1123, a fourth plastic lens 1124, and a fifth plastic lens 1125, respectively. Specifically, in the first embodiment, the number of plastic lenses is N, and N = 5. Furthermore, the imaging lens also includes a plurality of light-shielding plates 1131, 1132, 1133, a plurality of spacer rings 1134, 1135, and a fixing ring 1136, wherein the light-shielding plates 1131, 1132, 1133, spacer rings 1134, 1135, and fixing ring 1136 are all disposed within the plastic lens barrel 111.

[0087] Reference Figure 1E as well as Figure 1F ,in Figure 1E Drawing according to Figure 1A A schematic diagram of the plastic lens barrel 111 in the first embodiment. Figure 1F Drawing according to Figure 1A A three-dimensional schematic diagram of the plastic lens barrel 111 in the first embodiment. (From...) Figure 1E as well as Figure 1F As can be seen, the plastic lens barrel 111 includes an object-end outer surface 1111, an object-end outer bevel 1112, a minimum opening 1113, and a reverse bevel 1114. The object-end outer surface 1111 is the surface of the plastic lens barrel 111 facing the object side and closest to the object side, and is annular. The object-end outer bevel 1112 gradually tapers from the object-end outer surface 1111 towards the minimum opening 1113. The reverse bevel 1114 gradually expands from the minimum opening 1113 towards the image side, wherein the connection between the reverse bevel 1114 and the object-end outer bevel 1112 surrounds and forms the minimum opening 1113. In addition, the light shield 1131 is located between the minimum opening 1113 and the object-side periphery of the plastic lens closest to the object side (i.e., the first plastic lens 1121).

[0088] Figure 1G Drawing according to Figure 1A A schematic diagram of parameters h and d in the first embodiment. (From...) Figure 1G It can be seen that the distance between the minimum opening 1113 of the lens barrel and the outer surface 1111 of the object end in the direction parallel to the optical axis X is h, and the distance between the minimum opening 1113 of the lens barrel and the light shield 1131 in the direction parallel to the optical axis X is d, and h = 0.04 mm, d = 0.2155 mm, d / h = 5.3875.

[0089] Figure 1H Drawing according to Figure 1A A schematic diagram of parameter θ in the first embodiment. (From...) Figure 1H It can be seen that the outer inclined surface 1112 of the object end is the first conical surface (unlabeled), and the reverse inclined surface 1114 is the second conical surface (unlabeled). The angle between the first conical surface and the second conical surface through a section line of the optical axis X is θ, and θ = 112.63 degrees.

[0090] Figure 1I Drawing according to Figure 1A A schematic diagram of parameters ψD, ψED, and ψs1 in the first embodiment. (From...) Figure 1I It can be seen that the maximum outer diameter of the object end outer surface 1111 is ψD, the diameter of the minimum opening 1113 of the lens tube is ψED, the opening diameter of the light shield 1131 is ψs1, and ψD=2.6mm, ψED=1.59mm, ψs1=1.7mm, ψED / ψs1=0.935.

[0091] Cooperate Figure 1C as well as Figure 1D It can be seen that the distance between the outer surface 1111 of the object end and the surface plate 12 in the direction parallel to the optical axis X is g, and g = 0.13 mm. It must be noted that the backlight plate 122 of the surface plate 12 has an opening 1221 corresponding to the imaging lens. The area of ​​the surface glass 121 corresponding to the opening 1221 is the image capture window, which is coaxial with the imaging lens to facilitate the imaging lens to capture the image. The distance between the outer surface 1111 of the object end and the surface plate 12 in the direction parallel to the optical axis X is the same as the distance between the outer surface 1111 of the object end and the image side surface of the surface glass 121 in the direction parallel to the optical axis X. In addition, the principal ray angle between the principal imaging ray of the imaging lens corresponding to the 1.0F image height and the image sensor 114 is CRA 1.0F, and CRA 1.0F = 33.73 degrees.

[0092] <Second Embodiment>

[0093] Figure 2A A schematic diagram illustrating the surface plate 22 and camera module 21 of the electronic device according to the second embodiment of this disclosure is shown. Figure 2A It is known that the electronic device (unless otherwise labeled) includes a camera module 21 and a surface plate 22, wherein the surface plate 22 is disposed on the object side of the camera module 21.

[0094] In detail, Figure 2B Drawing according to Figure 2A Another schematic diagram of the surface plate 22 and camera module 21 in the second embodiment. Figure 2C Drawing according to Figure 2A Another schematic diagram of the surface plate 12 and camera module 11 in the second embodiment. As shown in Figures 2B and 2C, the surface plate 22 can be a plate with a display function module, which may include a surface glass 221 and a backlight board 222. The backlight board 222 may further include a circuit board or auxiliary components related to the backlight board. The backlight board 222 is connected to the image-side surface of the surface glass 221. The surface glass 221 may be a glass substrate, and the backlight board 222 may be an LED as the light source of the array, but this disclosure is not limited thereto. The camera module 21 includes an imaging lens (not otherwise labeled) and an image sensor 214, wherein the image sensor 214 is located on the image side (i.e., on the imaging surface 213) of the imaging lens, and the surface plate 22 is located on the object side of the imaging lens.

[0095] The imaging lens includes a plastic lens barrel 211 and multiple plastic lenses, wherein the plastic lenses are disposed within the plastic lens barrel 211 and, from the object side to the image side, are a first plastic lens 2121, a second plastic lens 2122, a third plastic lens 2123, a fourth plastic lens 2124, and a fifth plastic lens 2125, respectively. Specifically, in the second embodiment, the number of plastic lenses is N, and N = 5. Furthermore, the imaging lens also includes multiple light-shielding plates 2131, 2132, 2133, multiple spacer rings 2134, 2135, and a fixing ring 2136, wherein the light-shielding plates 2131, 2132, 2133, spacer rings 2134, 2135, and fixing ring 2136 are all disposed within the plastic lens barrel 211.

[0096] The plastic lens barrel 211 includes an object-end outer surface 2111, an object-end outer bevel 2112, a minimum opening 2113, and a reverse bevel 2114. The object-end outer surface 2111 is the surface of the plastic lens barrel 211 facing the object side and closest to the object side, and is annular. The object-end outer bevel 2112 gradually tapers from the object-end outer surface 2111 towards the minimum opening 2113. The reverse bevel 2114 gradually expands from the minimum opening 2113 towards the image side, wherein the connection between the reverse bevel 2114 and the object-end outer bevel 2112 surrounds and forms the minimum opening 2113. In addition, a light shield 2131 is located between the minimum opening 2113 and the object-side periphery of the plastic lens closest to the object side (i.e., the first plastic lens 2121).

[0097] Figure 2D Drawing according to Figure 2A A schematic diagram of parameters h and d in the second embodiment. (From...) Figure 2DIt can be seen that the distance between the minimum opening 2113 of the lens barrel and the outer surface 2111 of the object end in the direction parallel to the optical axis X is h, and the distance between the minimum opening 2113 of the lens barrel and the light shield 2131 in the direction parallel to the optical axis X is d, and h = 0.1155 mm, d = 0.14 mm, d / h = 1.2121.

[0098] Figure 2E Drawing according to Figure 2A A schematic diagram of parameter θ in the second embodiment. (From...) Figure 2E It can be seen that the outer inclined surface 2112 of the object end is the first conical surface (unlabeled), and the reverse inclined surface 2114 is the second conical surface (unlabeled). The angle between the first conical surface and the second conical surface through a section line of the optical axis X is θ, and θ = 93.95 degrees.

[0099] Figure 2F Drawing according to Figure 2A A schematic diagram of parameters ψD, ψED, and ψs1 in the second embodiment. (From...) Figure 2F It can be seen that the maximum outer diameter of the object end outer surface 2111 is ψD, the diameter of the minimum opening 2113 of the lens tube is ψED, the opening diameter of the light shield 2131 is ψs1, and ψD=2.6mm, ψED=1.66mm, ψs1=1.7mm, ψED / ψs1=0.976.

[0100] Cooperate Figure 2A as well as Figure 2C It can be seen that the distance between the outer surface 2111 of the object end and the surface plate 22 in the direction parallel to the optical axis X is g, and g = 0.2 mm. It must be noted that the backlight plate 222 of the surface plate 22 has an opening 2221 corresponding to the imaging lens. The area of ​​the surface glass 221 corresponding to the opening 2221 is the image capture window, which is coaxial with the imaging lens to facilitate the imaging lens to capture the image. The distance between the outer surface 2111 of the object end and the surface plate 22 in the direction parallel to the optical axis X is the same as the distance between the outer surface 2111 of the object end and the image side surface of the surface glass 221 in the direction parallel to the optical axis X. In addition, the principal ray angle between the principal imaging ray of the imaging lens corresponding to the 1.0F image height and the image sensor 214 is CRA 1.0F, and CRA 1.0F = 33.73 degrees.

[0101] <Third Embodiment>

[0102] Figure 3A A schematic diagram illustrating the surface plate 32 and camera module 31 of the electronic device according to the third embodiment of this disclosure is shown. Figure 3AAs can be seen, the electronic device (not otherwise labeled) includes a camera module 31 and a surface plate 32, wherein the surface plate 32 is disposed on the object side of the camera module 31. The surface plate 32 may be a plate with a display function module, and may include a surface glass 321 and a backlight plate 322, wherein the backlight plate 322 is connected to the image side surface of the surface glass 321. The surface glass 321 may be a glass substrate, and the backlight plate 322 may be an LED as the light source of the array, but this disclosure is not limited thereto. The camera module 31 includes an imaging lens (not otherwise labeled) and an image sensor 314, wherein the image sensor 314 is located on the image side of the imaging lens (i.e., on the imaging surface 313), and the surface plate 32 is located on the object side of the imaging lens.

[0103] The imaging lens includes a plastic lens barrel 311 and a plurality of plastic lenses, wherein the plastic lenses are disposed within the plastic lens barrel 311 and, from the object side to the image side, are a first plastic lens 3121, a second plastic lens 3122, a third plastic lens 3123, a fourth plastic lens 3124, and a fifth plastic lens 3125, respectively. Specifically, in the third embodiment, the number of plastic lenses is N, and N = 5. Furthermore, the imaging lens also includes a plurality of light-shielding plates 3131, 3132, 3133, a plurality of spacer rings 3134, 3135, and a fixing ring 3136, wherein the light-shielding plates 3131, 3132, 3133, spacer rings 3134, 3135, and fixing ring 3136 are all disposed within the plastic lens barrel 311.

[0104] The plastic lens barrel 311 includes an object-end outer surface 3111, an object-end outer bevel 3112, a minimum aperture 3113, and a reverse bevel 3114. The object-end outer surface 3111 is the surface of the plastic lens barrel 311 facing the object side and closest to the object side, and is annular. The object-end outer bevel 3112 gradually tapers from the object-end outer surface 3111 towards the minimum aperture 3113. The reverse bevel 3114 gradually expands from the minimum aperture 3113 towards the image side, wherein the connection between the reverse bevel 3114 and the object-end outer bevel 3112 surrounds and forms the minimum aperture 3113. In addition, a light shield 3131 is located between the minimum aperture 3113 and the object-side periphery of the plastic lens closest to the object side (i.e., the first plastic lens 3121).

[0105] Figure 3B Drawing according to Figure 3A A schematic diagram of parameters h and d in the third embodiment. (From...) Figure 3B It can be seen that the distance between the minimum opening 3113 of the lens barrel and the outer surface 3111 of the object end in the direction parallel to the optical axis X is h, and the distance between the minimum opening 3113 of the lens barrel and the light shield 3131 in the direction parallel to the optical axis X is d, and h = 0.05 mm, d = 0.215 mm, d / h = 4.3.

[0106] Figure 3C Drawing according to Figure 3A A schematic diagram of parameter θ in the third embodiment. (From...) Figure 3C It can be seen that the outer inclined surface 3112 of the object end is the first conical surface (unlabeled), and the reverse inclined surface 3114 is the second conical surface (unlabeled). The angle between the first conical surface and the second conical surface through a section line of the optical axis X is θ, and θ = 100 degrees.

[0107] Figure 3D Drawing according to Figure 3A A schematic diagram of parameters ψD, ψED, and ψs1 in the third embodiment. (From...) Figure 3D It can be seen that the maximum outer diameter of the object end outer surface 3111 is ψD, the diameter of the minimum opening 3113 of the lens tube is ψED, the opening diameter of the light shield 3131 is ψs1, and ψD=2.1mm, ψED=1.68mm, ψs1=1.7mm, ψED / ψs1=0.988.

[0108] Depend on Figure 3A It can be seen that the distance between the outer surface 3111 of the object end and the surface plate 32 in the direction parallel to the optical axis X is g, and g = 0.25 mm. It must be noted that the backlight plate 322 of the surface plate 32 has an opening 3221 corresponding to the imaging lens. The area of ​​the surface glass 321 corresponding to the opening 3221 is the image-capturing window, which is coaxial with the imaging lens to facilitate image capture. The distance between the outer surface 3111 of the object end and the surface plate 32 in the direction parallel to the optical axis X is the same as the distance between the outer surface 3111 of the object end and the image-side surface of the surface glass 321 in the direction parallel to the optical axis X. Furthermore, the principal ray angle between the principal imaging ray of the imaging lens corresponding to an image height of 1.0F and the image sensor 314 is CRA1.0F, and CRA1.0F = 33.73 degrees.

[0109] <Fourth Embodiment>

[0110] Figure 4A A schematic diagram illustrating the surface plate 42 and camera module 41 of the electronic device according to the fourth embodiment of this disclosure is shown. Figure 4A As can be seen, the electronic device (not otherwise labeled) includes a camera module 41 and a surface plate 42, wherein the surface plate 42 is disposed on the object side of the camera module 41. The surface plate 42 may be a plate with a display function module, and may include a surface glass 421 and a backlight plate 422, wherein the backlight plate 422 is connected to the image side surface of the surface glass 421. The surface glass 421 may be a glass substrate, and the backlight plate 422 may be an LED as the light source of the array, but this disclosure is not limited thereto. The camera module 41 includes an imaging lens (not otherwise labeled) and an image sensor 414, wherein the image sensor 414 is located on the image side (i.e., on the imaging surface 413) of the imaging lens, and the surface plate 42 is located on the object side of the imaging lens.

[0111] Reference Figure 4B It is a drawing based on Figure 4A An exploded view of the imaging lens in the fourth embodiment. Figure 4A as well as Figure 4B As can be seen, the imaging lens includes a plastic lens barrel 411 and multiple plastic lenses, wherein the plastic lenses are disposed within the plastic lens barrel 411, and from the object side to the image side are a first plastic lens 4121, a second plastic lens 4122, a third plastic lens 4123, a fourth plastic lens 4124, and a fifth plastic lens 4125, respectively. Specifically, in the fourth embodiment, the number of plastic lenses is N, and N = 5. Furthermore, the imaging lens also includes multiple light-shielding plates 4131, 4132, 4133, multiple spacer rings 4134, 4135, and a fixing ring 4136, wherein the light-shielding plates 4131, 4132, 4133, spacer rings 4134, 4135, and fixing ring 4136 are all disposed within the plastic lens barrel 411.

[0112] Reference Figure 4C It is a drawing based on Figure 4A A three-dimensional schematic diagram of the plastic lens barrel 411 in the fourth embodiment. Figure 4C It is known that the plastic lens barrel 411 includes an object-end outer surface 4111, an object-end outer bevel 4112, a minimum opening 4113, and a reverse bevel 4114. The object-end outer surface 4111 is the surface of the plastic lens barrel 411 facing the object side and closest to the object side, and is annular. The object-end outer bevel 4112 gradually tapers from the object-end outer surface 4111 towards the minimum opening 4113. The reverse bevel 4114 gradually expands from the minimum opening 4113 towards the image side, wherein the connection between the reverse bevel 4114 and the object-end outer bevel 4112 surrounds and forms the minimum opening 4113. In addition, the light shield 4131 is located between the minimum opening 4113 and the object-side periphery of the plastic lens closest to the object side (i.e., the first plastic lens 4121).

[0113] Furthermore, the anti-sloping surface 4114 includes a plurality of straight strip structures 4115 extending from the minimum opening 4113 of the lens barrel in a direction perpendicular to the optical axis X. In detail, in the fourth embodiment, the straight strip structures 4115 are wedge-shaped structures, numbering 320, and gradually tapering linearly from the anti-sloping surface 4114 toward the optical axis X.

[0114] Figure 4D Drawing according to Figure 4A A schematic diagram of parameters ψD, ψED and d in the fourth embodiment. Figure 4E Drawing according to Figure 4A A schematic diagram of parameter θ in the fourth embodiment. Figure 4F Drawing according to Figure 4A A schematic diagram of parameters h and ψs1 in the fourth embodiment. (From...) Figure 4D , Figure 4E as well as Figure 4F It can be seen that the distance between the minimum opening 4113 of the lens barrel and the outer surface 4111 of the object end in the direction parallel to the optical axis X is h, and the distance between the minimum opening 4113 of the lens barrel and the light shield 4131 in the direction parallel to the optical axis X is d, where h = 0.04 mm, d = 0.2155 mm, and d / h = 5.3875. The outer inclined surface 4112 of the object end is the first conical surface (unlabeled), and the reverse inclined surface 4114 is the second conical surface (unlabeled). The angle between the first conical surface and the second conical surface through a section line passing through the optical axis X is θ, and θ = 112.63 degrees. The maximum outer diameter of the object end outer surface 4111 is ψD, the diameter of the minimum opening 4113 of the lens tube is ψED, the opening diameter of the light shield 4131 is ψs1, and ψD=2.6mm, ψED=1.59mm, ψs1=1.7mm, ψED / ψs1=0.935.

[0115] Depend on Figure 4A It can be seen that the distance between the outer surface 4111 of the object end and the surface plate 42 in the direction parallel to the optical axis X is g, and g = 0.2 mm. It must be noted that the backlight plate 422 of the surface plate 42 has an opening 4221 corresponding to the imaging lens. The area of ​​the surface glass 421 corresponding to the opening 4221 is the image capture window, which is coaxial with the imaging lens to facilitate the imaging lens to capture the image. The distance between the outer surface 4111 of the object end and the surface plate 42 in the direction parallel to the optical axis X is the same as the distance between the outer surface 4111 of the object end and the image side surface of the surface glass 421 in the direction parallel to the optical axis X. In addition, the principal ray angle between the principal imaging ray of the imaging lens corresponding to the 1.0F image height and the image sensor 414 is CRA 1.0F, and CRA1.0F = 33.73 degrees.

[0116] Although the present disclosure has been presented above with reference to embodiments, it is not intended to limit the scope of the present disclosure. Anyone skilled in the art may make some modifications and refinements without departing from the spirit and scope of the present disclosure. Therefore, the scope of protection of the present disclosure shall be determined by the scope defined in the appended claims.

Claims

1. A camera module, characterized in that, Comprising an imaging lens and an image sensor, where the image sensor is located on the image side of the imaging lens, and the imaging lens has an optical axis and comprises: A plastic lens barrel, which comprises: An object-side outer surface, which is the surface of the plastic lens barrel facing the object side and closest to the object side, and is annular; A minimum lens barrel aperture, surrounded by the object-side outer surface; An inclined surface, gradually expanding from the minimum lens barrel aperture towards the image side; and An object-side outer inclined surface, tapering from the object-side outer surface towards the minimum lens barrel aperture; A plurality of plastic lenses, which are arranged inside the plastic lens barrel; and A light-shielding sheet, arranged inside the plastic lens barrel and located between the minimum lens barrel aperture and the object-side perimeter of the one closest to the object side among the plurality of plastic lenses; Wherein, the number of the plurality of plastic lenses is N, the distance between the minimum lens barrel aperture and the object-side outer surface in the direction parallel to the optical axis is h, and the principal ray angle between the principal imaging ray corresponding to 1.0F image height of the imaging lens and the image sensor is CRA 1.0F, which satisfies the following conditions: 4≤N≤10； 0.01 mm < h < 0.15 mm; and CRA 1.0F > 25.0 degrees; Wherein, the connection between the inclined surface and the object-side outer inclined surface surrounds and forms the minimum lens barrel aperture.

2. The camera module according to claim 1, characterized in that, The distance between the minimum lens barrel aperture and the light-shielding sheet in the direction parallel to the optical axis is d, which satisfies the following conditions: 0.12 mm < d < 0.4 mm.

3. The camera module according to claim 1, characterized in that, The inclined surface comprises a plurality of straight strip structures, extending from the minimum lens barrel aperture in the direction perpendicular to the optical axis.

4. An electronic device, characterized in that, Comprising: The camera module according to claim 1; and A surface flat plate, arranged on the object side of the camera module, and the surface flat plate is a flat plate with a display function module.

5. The electronic device according to claim 4, characterized in that, The distance between the object-side outer surface and the surface flat plate in the direction parallel to the optical axis is g, which satisfies the following conditions: 0.03 mm < g < 0.3 mm.

6. The electronic device according to claim 4, characterized in that, The distance between the object-side outer surface and the surface flat plate in the direction parallel to the optical axis is g, which satisfies the following conditions: 0.03 mm < g < 0.26 mm.

7. An electronic device, characterized in that, Comprising a camera module and a surface flat plate, the surface flat plate is a flat plate with a display function module, the camera module comprises an imaging lens and an image sensor, the image sensor is located on the image side of the imaging lens, the surface flat plate is located on the object side of the imaging lens, the imaging lens has an optical axis and comprises: A plastic lens barrel, which comprises: An object-side outer surface, which is the surface of the plastic lens barrel facing the object side and closest to the object side, and is annular; A minimum lens barrel aperture, surrounded by the object-side outer surface; An inclined surface, gradually expanding from the minimum lens barrel aperture towards the image side; and An object-side outer inclined surface, tapering from the object-side outer surface towards the minimum lens barrel aperture, wherein the connection between the inclined surface and the object-side outer inclined surface surrounds and forms the minimum lens barrel aperture; And A plurality of plastic lenses, which are arranged inside the plastic lens barrel; Among them, the number of the plurality of plastic lenses is N, the distance between the minimum opening of the lens barrel and the outer surface of the object end in the direction parallel to the optical axis is h, and the main light ray angle between a main imaging light ray corresponding to the 1.0F image height of the imaging lens and the image sensor is CRA 1.0F, which satisfies the following conditions: 4≤N≤10； 0.01 mm < h < 0.15 mm; and CRA 1.0F > 25.0 degrees.

8. The electronic device according to claim 7, characterized in that, The distance between the outer surface of the object end and the surface flat plate in the direction parallel to the optical axis is g, which satisfies the following conditions: 0.03 mm < g < 0.3 mm.

9. The electronic device according to claim 7, characterized in that, The distance between the outer surface of the object end and the surface flat plate in the direction parallel to the optical axis is g, which satisfies the following conditions: 0.03 mm < g < 0.26 mm.

10. The electronic device according to claim 7, characterized in that, The anti-inclined surface includes a plurality of straight strip structures, which extend from the minimum opening of the lens barrel in the direction perpendicular to the optical axis.

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