Camera module with annular light guide member and mobile terminal

Patent metadata

Field	Value
Publication number	US-12470796-B2
Application number	US-202218050978-A
Country	US
Kind code	B2
Filing date	Oct 28, 2022
Priority date	May 26, 2020
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

Abstract

A camera module and a mobile terminal are provided. The camera module includes a lens assembly, a light guide member and a light source, the light guide member is of an annular structure, and the light guide member is sleeved on an outer peripheral side of the lens assembly; and light emitted from the light source is incident in the light guide member through the outer peripheral side of the light guide member and is emitted out through a light emitting surface of the light guide member, and the light emitting surface faces toward an object side of the lens assembly. The camera module and the mobile terminal have sufficient and uniform illumination supplementation.

First claim

What is claimed is:

1 . A camera module, comprising:
a lens assembly; a light guide member, being of an annular structure as a whole, wherein the light guide member is sleeved on an outer peripheral side of the lens assembly; and a light source, wherein light emitted by the light source is incident in the light guide member from an outer peripheral side of the light guide member and is emitted out through a light emitting surface of the light guide member, and the light emitting surface faces toward an object side of the lens assembly; wherein the light guide member comprises a light guide body and a light incident part, the light guide body is sleeved on the outer peripheral side of the lens assembly, the light incident part is disposed on an outer peripheral side of the light guide body or on an image side of the light guide body, the light incident part is provided with a light incident surface for the light emitted by the light source to enter, and the light emitting surface is disposed on the light guide body; wherein a surface of the light guide member facing toward the image side is provided with a scattering structure; the light emitted by the light source is scattered by the scattering structure and then emitted from the light emitting surface to a camera area of the lens assembly; an orthographic projection of the light emitting surface in a direction of an optical axis of the lens assembly is located in an area where the scattering structure is located; wherein when the light incident part is disposed on the outer peripheral side of the light guide member, the scattering structure is disposed on the light guide member; the light guide body is further provided with at least one isolation groove disposed between the scattering structure and the light incident part, and wherein the at least one isolation groove extends in an arc along a peripheral direction of the light guide member.

2 . The camera module according to claim 1 , wherein the light incident part is disposed on the outer peripheral side of the light guide member, and the light incident surface gradually extends outward from the outer peripheral side of the light guide body along a direction far away from the optical axis of the lens assembly.

3 . The camera module according to claim 2 , wherein one of the following:
a plane perpendicular to the optical axis of the lens assembly is taken as a projection plane, a projection line of the light incident surface on the projection plane is connected with a projection outer contour edge line of the light emitting surface on the projection plane; a plane perpendicular to the optical axis of the lens assembly is taken as a projection plane, a distance between a center point of a projection line of the light incident surface on the projection plane and a projection outer contour edge line of the light emitting surface on the projection plane is at a range from 2.5 mm to 4.0 mm; the light incident part is further provided with a light incident peripheral side, an end of the light incident peripheral side is connected to the light incident surface, another end of the light incident peripheral side is gradually far away from the light incident surface and connected to the outer peripheral side of the light guide body; the light incident peripheral side is a convex arc surface, and the light incident peripheral side and the outer peripheral side of the light guide body are smoothly transited; and the light source is provided with a light output surface capable of emitting the light, the light output surface faces toward the light incident surface, a distance between the light output surface and the light incident surface is gradually increased along the direction far away from the optical axis of the lens assembly, and an included angle between a plane where the light output surface is located and a plane where the light incident surface is located is at a range from 0 degrees (°) to 20°.

4 . The camera module according to claim 2 , wherein a plane perpendicular to the optical axis of the lens assembly is taken as a projection plane, an included angle between a projection line of the light incident surface on the projection plane and a reference radial direction of the lens assembly is at a range from 0° to 10°, and the reference radial direction is a radial direction of a projection point formed on the projection plane through an edge of the light incident surface far away from the outer peripheral side of the light guide body; and
wherein the light guide body comprises a light guide column and an annular light guide ring surrounding an outer periphery of the light guide column; a surface of the light guide column facing toward the object side is a first subsurface, a surface of the annular light guide ring facing toward the object side is a second subsurface, the first subsurface is close to the object side relative to the second subsurface, and at least part of the first subsurface forms the light emitting surface, the light incident part is disposed on an outer peripheral side of the annular light guide ring.

5 . The camera module according to claim 4 , wherein a surface of the light guide column facing toward the image side is a third subsurface, a surface of the annular light guide ring facing toward the image side is a fourth subsurface; and the fourth subsurface is located between a plane where the first subsurface is located and a plane where the third subsurface is located, or, the fourth subsurface is coplanar with the third subsurface.

6 . The camera module according to claim 1 , wherein the light incident part is disposed on the image side of the light guide body, a radial size of an outer contour line of the light incident part is smaller than a radial size of an outer contour line of the light guide body, an outer peripheral side of the light incident part and a surface of the light guide body facing toward the image side define a first installation space, the light source is disposed in the first installation space, and at least part of the outer peripheral side of the light incident part is the light incident surface; and
wherein an orthographic projection area of the light emitting surface in a direction of an optical axis of the lens assembly is separated from an orthographic projection area of an inner wall of the first installation space in the direction of the optical axis of the lens assembly.

7 . The camera module according to claim 1 , wherein the light guide member is provided with an incidence opening, an object side end of the lens assembly is disposed in the incidence opening, the incidence opening is provided with a shrinking section, a radial size of the shrinking section is gradually decreased from the object side to an image side, and a side wall of the shrinking section is the light emitting surface of the light guide member; or
wherein at least one of at least part of a surface of the light guide member facing toward an image side, a part of the outer peripheral side of the light guide member, and a part of the light guide member facing toward the object side is provided with one of a reflective layer and a light shading layer.

8 . The camera module according to claim 1 , wherein one or more of the following:
the light incident part comprises a plurality of light incident parts, the plurality of light incident parts are arranged at intervals along a peripheral direction of the light guide body, and light sources and the plurality of light incident parts are arranged in one-to-one correspondence; and the light guide member further comprises at least one positioning structure disposed on the outer peripheral side of the light guide body, the positioning structure and the light incident part are arrang

Assignees

• Guangdong Oppo Mobile Telecommunications Corp Ltd

Inventors

• Liang Jiajun
• Wei Yi
• Lin Mozhou
• Yu Aixiang
• Zhang Baicheng
• Wu Jiyan
• Qin Yong

Classifications

• H04M1/0264 Primary

  for a camera module assembly · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• H04N23/51

  Housings · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/56 Primary

  provided with illuminating means · CPC title