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KR-20260063086-A - CAMERA MODULE

KR20260063086AKR 20260063086 AKR20260063086 AKR 20260063086AKR-20260063086-A

Abstract

A camera module according to one embodiment comprises a lens module including at least one lens, an optical waveguide member disposed below the lens module and propagating light incident from the lens module in a first direction in a second direction by internal total reflection and reflecting light propagated in the second direction in the first direction, and an image sensor module disposed above the optical waveguide member spaced apart from the lens module and converting light reflected in the first direction by the optical waveguide member into an electrical signal, wherein the optical waveguide member comprises a plurality of first divided reflective surfaces formed at an angle so as to reflect light incident from the lens module in the first direction, an optical waveguide section that propagates light reflected from the first divided reflective surfaces in the second direction by internal total reflection, and a plurality of second divided reflective surfaces formed at an angle so as to reflect light propagated by the optical waveguide section in the first direction, wherein the optical waveguide member comprises a plurality of second divided reflective surfaces formed at an angle so as to reflect light propagated by the optical waveguide section in the first direction, wherein the optical waveguide member is disposed below the image sensor module.

Inventors

  • 엄재기
  • 정유진

Assignees

  • 삼성전기주식회사

Dates

Publication Date
20260507
Application Date
20241030

Claims (15)

  1. A lens module comprising at least one lens, An optical waveguide member disposed below the lens module, propagating light incident from the lens module in a first direction in a second direction by internal total reflection, and reflecting light propagated in the second direction in the first direction; and It includes an image sensor module disposed above the optical waveguide member at a distance from the lens module and converting light reflected in the first direction by the optical waveguide member into an electrical signal. The above-described optical waveguide member comprises a plurality of first divided reflective surfaces formed at an angle so as to reflect light incident from the lens module in a first direction at the lower side of the lens module, an optical waveguide section that propagates light reflected from the first divided reflective surfaces in the second direction by internal total reflection, and a plurality of second divided reflective surfaces formed at an angle so as to reflect light propagated by the optical waveguide section in the first direction at the lower side of the image sensor module.
  2. In paragraph 1, The first divided reflective surface is inclined such that the angle of incidence of light incident from the lens module in the first direction is greater than the critical angle of the optical waveguide member, and The above second divided reflective surface is a camera module in which the incident angle of light propagated by the optical waveguide is inclined more significantly than the critical angle of the optical waveguide member.
  3. In paragraph 1, A camera module in which the first divided reflective surface and the second divided reflective surface are formed to be inclined at an angle of 5 degrees or more and 45 degrees or less with respect to a plane perpendicular to the first direction.
  4. In paragraph 3, A camera module in which the first divided reflective surface and the second divided reflective surface are formed to be inclined at an angle of 15 degrees or more and 30 degrees or less with respect to a plane perpendicular to the first direction.
  5. In paragraph 1, A camera module in which the first divided reflective surface and the second divided reflective surface each have 2 to 5 reflective surfaces.
  6. In paragraph 1, A camera module in which the first divided reflective surface and the second divided reflective surface include a metal coating layer.
  7. In paragraph 1, The above-mentioned optical waveguide is a camera module in which the optical waveguide is a prism made of plastic or glass material.
  8. In paragraph 1, The above image sensor module is a camera module in which an imaging surface for forming light reflected by the optical waveguide member is positioned to face the upper surface of the optical waveguide member.
  9. In paragraph 1, The above lens module is a camera module comprising an AF/OIS driving unit that performs autofocus (AF) and optical image stabilization (OIS) functions.
  10. In paragraph 1, The above image sensor module is a camera module comprising an AF/OIS driving unit that performs autofocus adjustment and optical image stabilization functions.
  11. In paragraph 1, A camera module wherein the lens module includes an AF drive unit that performs an autofocus adjustment function, and the image sensor module includes an OIS drive unit that performs an optical image stabilization function.
  12. A lens module comprising at least one lens, An optical waveguide module disposed below the lens module, which propagates light incident from the lens module in a first direction in a second direction by internal total reflection, and reflects the light propagated in the second direction in the first direction; It includes an image sensor module positioned above the optical waveguide module, spaced apart from the lens module, and converting light reflected in the first direction by the optical waveguide module into an electrical signal. The above-described optical waveguide module comprises a first mirror plate, a plurality of first divided reflection arrays arranged at an angle such that light incident from the lens module in a first direction is reflected on one surface of the first mirror plate on the lens module side, a second mirror plate arranged on the upper portion of the first mirror plate to form an optical waveguide between the first mirror plate and the first mirror plate, and a plurality of second divided reflection arrays arranged at an angle such that light propagated by the optical waveguide is reflected in the first direction on one surface of the first mirror plate on the image sensor side.
  13. In Paragraph 12, A camera module in which the first divided reflection array and the second divided reflection array are arranged at an angle of 15 degrees or more and 30 degrees or less with respect to the first mirror plate.
  14. In Paragraph 12, A camera module in which the first divided reflection array and the second divided reflection array each have 2 to 5 reflective surfaces.
  15. In Paragraph 12, The above image sensor module is a camera module in which an imaging plane that forms an image of light reflected by the above waveguide module is positioned to face the above waveguide module.

Description

Camera Module The present disclosure relates to a camera module. Driven by remarkable advancements in information and communication technology and semiconductor technology, the distribution and use of electronic devices are increasing rapidly. Recently, cameras are being incorporated into portable electronic devices, including smartphones, tablet PCs, and laptop computers. In the case of smartphone cameras, initially, they simply competed in magnification using low-resolution sensors, but the nature of technological competition is changing in the direction of overcoming the difference in image quality levels with wide cameras. In response to this, high-resolution image sensors are being adopted, and consequently, the size of the image sensor is increasing, thereby raising the overall size of the camera module. In particular, for camera modules equipped with a folded zoom function—which increases focal length by refracting vertically entering light horizontally—there is a problem in that the required height of the camera module cannot be met when applying high-resolution image sensors. Therefore, there is an increasing need for the development of technology capable of achieving high pixel count and high magnification zoom performance while meeting the requirements for camera module miniaturization. FIG. 1 is an external perspective view of a camera module according to one embodiment. FIG. 2 is an exploded perspective view showing the camera module shown in FIG. 1 disassembled. Figure 3 is a partial cross-sectional view of the camera module shown in Figure 1. Figure 4 is a drawing showing an optical waveguide component in the camera module shown in Figure 1. Figure 5 is a schematic diagram illustrating the optical path of the camera module shown in Figure 1. FIG. 6 is a schematic diagram illustrating a camera module according to another embodiment. FIG. 7 is a schematic diagram illustrating a camera module according to another embodiment. FIG. 8 is a schematic diagram illustrating a camera module according to another embodiment. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. In order to clearly explain the invention in the drawings, parts unrelated to the explanation have been omitted, and the same reference numerals have been used for identical or similar components throughout the specification. Furthermore, in the attached drawings, some components may be exaggerated, omitted, or schematically depicted, and the size of each component does not entirely reflect its actual size. The attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and the technical concept disclosed in this specification is not limited by the attached drawings; it should be understood that all modifications, equivalents, and substitutions included within the concept and technical scope of the present invention are included. Terms including ordinal numbers, such as first, second, etc., may be used to describe various components, but said components are not limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. Furthermore, when it is said that a part, such as a layer, membrane, region, or plate, is "on" or "on" another part, this includes not only the case where it is "directly above" the other part, but also the case where there is another part in between. Conversely, when it is said that a part is "directly above" another part, it means that there is no other part in between. Also, saying that a part is "on" or "on" a reference part means that it is located above or below the reference part, and does not necessarily mean that it is located "on" or "on" in the direction opposite to gravity. Throughout the specification, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Accordingly, when a part is said to “comprising” a certain component, unless specifically stated otherwise, this means that it may include additional components rather than excluding other components. Additionally, throughout the specification, "planar" means when the subject part is viewed from above, and "cross-sectional" means when the cross-section obtained by vertically cutting the subject part is viewed from the side. Furthermore, throughout the specification, when the term "connected" is used, it does not mean only that two or more components are directly connected, but may also mean that two or more components are indirectly connected through other components, that they are connected not only physically