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KR-102962378-B1 - Microlens array and projection device for a vehicle lamp having thereof

KR102962378B1KR 102962378 B1KR102962378 B1KR 102962378B1KR-102962378-B1

Abstract

A micro-lens array module and a projection device for an automobile lamp using the same are disclosed. The micro-lens array module may include: a plurality of incident lenses into which light is incident; a plurality of exit lenses that emit light incident from the incident lenses into a preset area; and a plurality of shields that block at least a portion of the light proceeding from the incident lenses to the exit lenses and have a transmission pattern of a preset shape. Any one of the transmission patterns of the shields may be further shielded by a shielding area corresponding to a preset length from the bottom end toward the top end compared to at least one other transmission pattern.

Inventors

  • 강주성

Assignees

  • 주식회사 옵토전자

Dates

Publication Date
20260511
Application Date
20231130

Claims (8)

  1. A light source that emits light; and A micro lens array module comprising: a plurality of incident lenses into which light from the light source is incident; a plurality of output lenses that emit light incident from the incident lenses into a preset area; and a plurality of shields that block at least a portion of the light proceeding from the incident lenses to the output lenses and have a transmission pattern of a preset shape. The light transmitting the above transmission pattern is, As transmission occurs from the lower part of the above transmission pattern to the upper part, it is projected in a direction that gradually moves away from the micro-lens array module in the above preset area, and The transmission pattern of any one of the above shields is, Compared to at least one other transmission pattern, it is further shielded by a shielding area corresponding to a preset length from the lower part toward the upper part, and The shields mentioned above are, It is divided into a plurality of groups, including a first group comprising p (where p is an integer greater than or equal to 1) shields and a second group comprising q (where q is an integer greater than or equal to 2) shields, and The transmission pattern of the shield belonging to the first group above is, Compared to the transmission pattern of the shield belonging to the second group above, it is further shielded by a shielding area corresponding to a preset length from the lower part toward the upper part, and The above-mentioned output lenses are, It is divided into a plurality of groups, including a first emission group comprising p (where p is an integer greater than or equal to 1) emission lenses and a second emission group comprising q (where q is an integer greater than or equal to 2) emission lenses. At least one of the above-mentioned incident lenses is, It is matched to the p shields belonging to the first group and the p emission lenses belonging to the first emission group, and At least one other of the above-mentioned incident lenses is, Matched to the q shields belonging to the second group and the q emission lenses belonging to the second emission group, Projection device for automotive lamps.
  2. In Article 1, Each of the transmission patterns of the above shields is, The areas of the shielding regions mentioned above are all set differently, Projection device for automotive lamps.
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  5. In Article 1, The transmission patterns belonging to the plurality of shields mentioned above all have different preset lengths corresponding to the shielding area, and The previously set length of each of the above transmission patterns is, Adjusted according to the following mathematical formula, Projection device for automotive lamps. [Mathematical Formula] Yo is the length of the transmission pattern of the reference shield (length from one end to the other end), m is the total number of shields, n is the number assigned to the shield other than the reference shield (1 ≤ n ≤ (m-1)), α (0 ＜ α ＜ 1) is a preset weight, and Ln is a preset length corresponding to the shielding area shielded in the transmission pattern assigned to the nth shield.
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  8. A light source that emits light; and A micro lens array module comprising: a plurality of incident lenses into which light from the light source is incident; a plurality of output lenses that emit light incident from the incident lenses into a preset area; and a plurality of shields that block at least a portion of the light proceeding from the incident lenses to the output lenses and have a transmission pattern of a preset shape. The light transmitting the above transmission pattern is, As transmission occurs from the lower part of the above transmission pattern to the upper part, it is projected in a direction that gradually moves away from the micro-lens array module in the above preset area, and The transmission pattern of any one of the above shields is, Compared to at least one other transmission pattern, it is further shielded by a shielding area corresponding to a preset length from the lower part toward the upper part, and The shields mentioned above are, It is divided into a plurality of groups, including a first group comprising p (where p is an integer greater than or equal to 1) shields and a second group comprising q (where q is an integer greater than or equal to 2) shields, and The transmission pattern of the shield belonging to the first group above is, Compared to the transmission pattern of the shield belonging to the second group above, it is further shielded by a shielding area corresponding to a preset length from the lower part toward the upper part, and The above-mentioned incident lenses are, It is divided into a plurality of groups, including a first incident group comprising p (where p is an integer greater than or equal to 1) incident lenses and a second incident group comprising q (where q is an integer greater than or equal to 2) incident lenses, and At least one of the above-mentioned output lenses is, The p shields belonging to the first group and the p incident lenses belonging to the first incident group are matched in correspondence with each other. At least one other of the above-mentioned output lenses is, The q shields belonging to the second group, and the q incident lenses belonging to the second incident group, which are matched accordingly. Projection device for automotive lamps.

Description

Microlens array module and projection device for a vehicle lamp having thereof The present invention relates to a micro-lens array module and a projection device for an automobile lamp using the same. Microlens arrays containing multiple microlenses are widely used in micro-optical fields such as optical communication and image observation. In particular, efforts to utilize microlens arrays in various fields, such as lighting modules for automotive lamps and display panels, have recently been underway, and continuous technological development is taking place. Automotive lamps may include headlamps, taillamps, turn signals, etc. Automotive lamps can perform functions such as ensuring visibility or conveying simple information to the surroundings. Micro-lens arrays are widely used in automotive lamps to generate and project required images because they can produce high-quality images in a relatively small size. However, automotive lamps equipped with such micro-lens arrays project light onto the road surface at an angle, which resulted in a problem where the image projected onto the road surface did not have a uniform amount of light. FIG. 1 is a schematic diagram showing a micro lens array module according to an embodiment of the present invention and a projection device for an automobile lamp using the same. FIG. 2 is an exploded perspective view schematically showing a micro-lens array module according to an embodiment of the present invention. FIG. 3 is a schematic diagram showing an optical path passing through a micro-lens array module according to an embodiment of the present invention. Figure 4 is a diagram showing an image and light intensity projected through a projection device for an automobile lamp. FIGS. 5 and FIGS. 6 are drawings for explaining the transmission pattern of a shield according to an embodiment of the present invention. Figure 7 is a graph illustrating the effects according to an embodiment of the present invention. Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Identical or similar components regardless of drawing symbols are assigned the same reference number, and redundant descriptions thereof will be omitted. The suffixes "module" and "part" used for components in the following description are assigned or used interchangeably solely for the ease of drafting the specification and do not inherently possess distinct meanings or roles. Furthermore, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of related prior art could obscure the essence of the embodiments disclosed in this specification, such detailed description will be omitted. Additionally, the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification; the technical concept disclosed in this specification is not limited by the attached drawings, and it should be understood that they include all modifications, equivalents, and substitutions that fall within the spirit and technical scope of the invention. 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. When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between. A singular expression includes a plural expression unless the context clearly indicates otherwise. In this application, terms such as “comprising” or “having” are intended to specify 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. In addition, it should be noted that the referenced drawings are schematically depicted, and the ratios of the dimensions of objects drawn on the drawings may differ from the ratios of the dimensions of actual objects, and that the ratios of the dimensions of objects may also differ from one another. FIG. 1 is a schematic diagram showing a micro lens array module according to an embodiment of the present invention and a projection device for an automobile lamp using the same. Referring to FIG. 1, a micro lens array module (100) (hereinafter referred to as an MLA (Micro Lens Array) module) according to an embodiment of the present invention and a projection device (1) for an automobile l