CN110805844A

CN110805844A - Welcome lamp

Info

Publication number: CN110805844A
Application number: CN201810799137.6A
Authority: CN
Inventors: 蔡威弘
Original assignee: Young Optics Inc
Current assignee: Young Optics Inc
Priority date: 2018-07-19
Filing date: 2018-07-19
Publication date: 2020-02-18

Abstract

A welcome lamp comprises a first image source, a second image source, a lens array and a focusing lens. The lens array is provided with a first lens and a second lens, the first lens has positive diopter and is arranged at the downstream of the optical path of the first image source, and the second lens has positive diopter and is arranged at the downstream of the optical path of the second image source. The focusing lens is arranged at the downstream of the optical paths of the first lens and the second lens, wherein the optical paths of the first image source and the second image source in front of the focusing lens are mutually independent, and the image of the first image source and the image of the second image source are substantially overlapped at the downstream of the optical path of the focusing lens.

Description

Welcome lamp

Technical Field

The invention relates to a lamp, in particular to a welcome lamp.

Background

Generally, a courtesy lamp (also called a floor lamp) is used for auxiliary lighting, and is used for ground lighting or route lighting under low ambient light. For example, a courtesy lamp used in an automobile is usually installed on a door or a rearview mirror, and when the door is opened, an illumination function is turned on to project an image on the ground, so that not only unique dazzling image light and a projected image are generated, but also a function of illuminating the ground is provided when the door is opened, for example, under low ambient light at night, so that people getting on or off the automobile can notice the ground condition without mistakenly stepping on dirty, puddle or other dangerous terrains on the ground.

The conventional greeting lamp utilizes the deviation between the optical axis of the projection lens set and the optical axis of the image source to overlap the projected image sources. However, the conventional greeting lamp cannot further reduce the volume of the greeting lamp because the deviation between the optical axis of the projection lens group and the optical axis of the image source must be considered, and if the number of the image sources is further increased, the number of the projection lenses must be correspondingly increased, which not only further increases the volume of the lamp, but also relatively increases the manufacturing cost.

Disclosure of Invention

In one embodiment of the present invention, a greeting lamp is provided, which can be further reduced in size and has a lower cost.

The greeting lamp of an embodiment of the invention at least comprises two image sources, a lens array and a focusing lens. The lens array comprises at least two lenses, the two lenses have positive diopter, and the two lenses are respectively arranged at the downstream of the optical paths of the two image sources. The focusing lens is arranged at the downstream of the optical path of the two lenses, wherein the optical paths of the two image sources before the focusing lens are mutually independent, and the images of the two image sources are substantially overlapped at the downstream of the optical path of the focusing lens.

The greeting lamp provided by the embodiment of the invention at least comprises two optical element groups and a lens arranged outside the optical element groups. Each optical element group comprises an image source and a lens respectively, and the lens in the optical element group is arranged on the downstream of the optical path of the image source. The lens outside the optical element group has positive diopter and is arranged at the downstream of the optical paths of the two optical element groups. The lenses in the two optical element groups are the same piece of element and in a single element form, and the two optical element groups have substantially the same imaging positions through the lenses arranged outside the optical element groups.

The greeting lamp of an embodiment of the invention at least comprises two image sources, a lens array and a focusing lens. The lens array comprises two lenses with positive diopter, and the two lenses are respectively arranged at the downstream of the optical path of the corresponding image source. The focusing lens is arranged at the downstream of the optical path of each lens, in addition, the optical path of each image source before the focusing lens is mutually independent, each image source has a central point, and the distance between the central point of each image source and the imaging position after the imaging of the focusing lens is less than 5 mm.

Based on the above, the usher lamp in an embodiment of the invention employs the lens array, so that the image source can be substantially overlapped with the optical path downstream of the focusing lens, thereby making the usher lamp of the invention have an advantage of small volume. In addition, because the welcome lamp in one embodiment of the invention adopts the lens array, and a lens with an optical axis deviating from the image source is not adopted, the volume of the welcome lamp is smaller, the whole volume is not increased along with the increase of the number of the image sources, and the cost can be further reduced.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are described in detail with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view illustrating a greeting lamp according to an embodiment of the invention.

Fig. 2 is a schematic view of a greeting lamp according to another embodiment of the invention.

FIG. 3 is a schematic diagram of an embodiment of a lens array with respect to a plane in which an image source is located.

Detailed Description

However, the invention is not drawn to scale in figures 1 and 2, and figure 3 is scaled relative to figures 1 and 2 to emphasize features. Fig. 1 is a schematic view of a greeting lamp according to an embodiment of the invention. Referring to fig. 1, in the present embodiment, the greeting lamp 100 includes an image source 111, an image source 121, a lens array 130, a focusing lens group 140 and a controller 160.

In this example, the image source 111 (which may be referred to as a first image source) and the image source 121 (which may be referred to as a second image source) are each a device or combination of devices that provide an image beam. The image source 111 and the image source 121 may respectively include a backlight source and a fixed image light valve. The backlight source provides an illumination beam, and may be a packaged led light emitting module, a packaged laser light emitting module, or a device or element capable of outputting illumination light, such as a fluorescent lamp or an electrothermal light emitting element (lamp). In this embodiment, the backlight source includes an encapsulated led module. The fixed image light valve can convert the illumination light into image light with fixed and unchangeable patterns, such as black and white, monochrome or color slides, films, and plate members (such as metal or plastic plates) with specific shape light transmission parts (such as holes), and the process of converting the illumination light into the image light by the fixed image light valve is not power-consuming. In this example, the fixed image light valve is a slide, which is a transparent film carrying a specific pattern through which light is partially absorbed, blocked or reflected, and allows a portion of the light to pass through to form the pattern. Besides the above design, the image source 111 and the image source 121 may also be active image light output devices, such as an organic light emitting diode screen composed of a plurality of light emitting pixels, and the invention is not limited thereto.

The lens array 130 in this embodiment is provided with a lens 131 (which may be referred to as a first lens) and a lens 133 (which may be referred to as a second lens). The lens array 130 may be a single element that includes a plurality of refractive surfaces arranged in an array. That is, the lens array 130 can be integrally formed, and be a single element made of the same material and in a single element form (One piece formed).

For example, the lens array 130 in the present embodiment is an array lens, such as a fly-eye (fly-eye) lens. In this case, the lens 131 and the lens 133 refer to each sub-lens unit (Cell) including an incident surface and an emergent surface on the array lens. For example, the fly-eye lenses are arranged in an n × m matrix, and either n or m may be 1 or more, while the other is 2 or more. That is, when the lens array is a fly-eye lens, it can be arranged in 1 row 2 column, 2 row 1 column, or 2 row 2 column. In addition, the surface of the fly eye (fly-eye) lens in the light incoming direction and the light outgoing direction can be respectively provided with a dioptric surface; alternatively, only one of the light-incident-direction surface and the light-exiting-direction surface has a refractive structure and the other is a flat surface. Furthermore, in another embodiment, the

lenses

131 and 133 can be a cylindrical lens or a barrel lens, a concave lens, a convex lens, or a spherical or aspheric lens such as a hyperbolic lens with different curvature radius on the lens surface along the radial direction perpendicular to the optical axis. The

lenses

131 and 133 of the above examples each have a positive refractive power. In addition, the diopter values and the diopter values of the

lenses

131 and 133 can be the same or different, and in this example, the diopter values and the diopter values of the

lenses

131 and 133 are the same.

In an embodiment of the present invention, the lens 131 and the lens 133 may also be two separate lenses. The

lenses

131 and 133 are two lenses and can be embedded in a fixing frame for fixing, but the invention is not limited thereto, and the

lenses

131 and 133 can also be fixed in other manners.

The focusing lens assembly 140 of this embodiment may include one or more optical elements, such as lenses, prisms, mirrors, etc., to name a few. In this embodiment, the focusing lens assembly 140 includes only one focusing lens with positive diopter and has positive diopter, i.e. it has the ability of converging light. In another embodiment, the focusing lens group 140 may also include a plurality of lenses or optical elements with no diopter, such as flat glass, and the diopter of each lens can be positive or negative, but the total diopter is preferably positive.

The controller 160 in this embodiment may be, for example, a Central Processing Unit (CPU), a microprocessor, a Digital Signal Processor (DSP), a Programmable Logic Device (PLD), other similar devices, or a combination thereof, but the invention is not limited thereto. In addition, in one embodiment, each function performed by the controller 160 can be implemented by a plurality of program codes, which are stored in the memory, and thus can be executed by the controller 160. Alternatively, in one embodiment, each function performed by the controller 160 can be performed by one or more circuits, but the invention is not limited to whether each function performed by the controller 160 is performed by software or hardware.

The lens 131 has positive refractive power and is disposed downstream of the optical path of the image source 111, and the lens 133 has positive refractive power and is disposed downstream of the optical path of the image source 121. The focusing lens assembly 140 is disposed downstream of the lens 131 and the lens 133, wherein the optical paths of the image source 111 and the image source 121 before the focusing lens assembly 140 are independent of each other, and the image of the image source 111 and the image of the image source 121 are substantially overlapped downstream of the optical path of the focusing lens assembly 140.

Therefore, in the optical path design, the light 112 emitted from the image source 111 firstly passes through the lens 131 and then passes through the focusing lens assembly 140 to form an image at the position P1 downstream of the focusing lens assembly 140 in the optical path, and the light 122 emitted from the image source 121 firstly passes through the lens 133 and then passes through the focusing lens assembly 140 to form an image at the position P2 downstream of the focusing lens assembly 140 in the optical path, wherein the optical paths of the image source 111 and the image source 121 before the focusing lens assembly 140 are independent from each other, and the image of the image source 111 and the image of the image source 121 substantially overlap at the downstream of the optical path of the focusing lens assembly 140.

It is worth mentioning that the light is transmitted from the upstream to the downstream of the optical path. Thus, the optical path downstream of an element may be understood as the portion of the optical path after light has passed through the element. For example, the optical path downstream of the image source 111, the optical path after the light is emitted from the image source 111, is called the optical path downstream of the image source 111, such as the lens 131 is located downstream of the optical path of the image source 111, the lens 140 is downstream of the optical path of the lens 131, and so on.

Further, the image of the image source 111 and the image of the image source 121 are substantially overlapped on the optical path downstream of the focusing lens group 140, and specifically, the geometric optical design means that the effect is acceptable when the distance between the imaging position P1 and the imaging position P2 after the center C1 of the image source 111 and the center C2 of the image source 121 are imaged by the focusing lens group 140 is less than 1 centimeter, preferably less than 5 millimeters (mm), preferably less than 1 millimeter (mm), and most preferably less than 0.5 millimeters (mm). In this embodiment, the greeting lamp 100 can be further designed as follows: the center C1 of the image source 111 is located on the optical axis of the lens 131, and the center C2 of the image source 121 is located on the optical axis of the lens 133.

In this example, the actual design of the aforementioned components can be found in table one below.

Watch 1

Fig. 3 is a schematic diagram of a plane where an image source is located relative to a lens array in an embodiment, and fig. 3 is a drawing of the structure of fig. 1 according to actual scale of a product, and detailed parameters of the drawing can be referred to in table 1. Referring to fig. 1 and fig. 3, for example, in the present embodiment, the image source 111 and the image source 121 are a surface 1, the light incident surface of the lens 131 (or the sub-lens surface 232a of fig. 3) is a surface 2, the light emitting surface of the lens 131 (or the sub-lens surface 234a of fig. 3) is a surface 3, the light incident surface of the focusing lens assembly 140 is a surface 4, and the light emitting surface of the focusing lens assembly 140 is a surface 5, where the thickness of the surface is a distance between the surface and a next surface on the optical path. In this example, surface 1 and surface 2 are in contact, so that the thickness of surface 1 is 0, and surface 1 is the source of the image, so that the radius of curvature of surface 1 is infinite; further, the surface 2 had a thickness of 10.00 mm in optical design, a radius of curvature of 3.75 mm, a refractive index of 1.53, and an abbe number of 56.28; the thickness of the surface 3 is 0.20 mm, the radius of curvature is-3.75 mm; the surface 4 has an optically designed thickness of 2.15 mm, a radius of curvature of 6.00 mm, a refractive index of 1.53 and an abbe number of 56.28; and the thickness of the surface 5 (i.e., the distance between the focusing and imaging surfaces in the focusing lens group 140) is 1000.00 mm, and the radius of curvature is 6.13 mm.

From another perspective, referring to fig. 1, the greeting lamp 100 in the present embodiment includes an optical element group 110 (which may be referred to as a first optical element group), an optical element group 120 (which may be referred to as a second optical element group), and a lens 150.

The optical element group 110 includes an image source 111 (which may be referred to as a first image source) and a lens 131 (which may be referred to as a first lens), and the optical element group 120 includes an image source 121 (which may be referred to as a second image source) and a lens 133 (which may be referred to as a second lens).

The lens 150 in this embodiment can be an optical element with positive refractive power, such as a lens, a prism, etc., as examples. In this example, the lens 150 is a lens with a positive diopter.

In addition, a lens 131 is disposed downstream of the image source 111 in the optical path. The lens 133 is disposed optically downstream of the image source 121. The lens 150 is disposed in the optical path downstream of both the optical element group 110 and the optical element group 120. The optical element group 110 and the optical element group 120 have substantially the same imaging position through the lens 150. As above, the optical element group 110 and the optical element group 120 have substantially the same imaging position through the lens 150, and particularly, in terms of geometrical and optical design, when the distance between the imaging position P1 and the imaging position P2, which are the center C1 of the image source 111 of the optical element group 110 and the center C2 of the image source 121 of the optical element group 120 after being imaged through the lens 150, is less than 2 centimeters (cm), the effect is acceptable; when the thickness is less than 5 millimeters (mm), the effect is good; when the thickness is less than 1 millimeter (mm), the effect is better. In this example, the welcome lamp 100 can be further designed as follows: the center C1 of the image source 111 is located on the optical axis of the lens 131, and the center C2 of the image source 121 is located on the optical axis of the lens 133.

In addition, the controller 160 of the greeting lamp 100 in the above related embodiment is electrically connected to the image source 111 and the image source 121, and is configured to control one of the image source 111 and the image source 121 to emit light, or control the image source 111 and the image source 121 to emit light at the same time. The image source 111 has the same pattern or different pattern from the image source 121, and when the image source 111 has the same pattern as the image source 121, the design is used to increase the brightness of the image source or project two different brightnesses according to the environment. When the pattern of the image source 111 is different from the pattern of the image source 121, the controller 160 may control the image source 111 and the image source 121 to emit light simultaneously or one of them to emit light (i.e., the image source 111 emits light while the image source 121 does not emit light, or the image source 121 emits light while the image source 111 does not emit light), so that the usher light 100 may project three different patterns through the controller 160.

In order to improve the quality of the projected image of the image source and minimize the size of the greeting lamp, the image source 111 is in contact with the lens 131, and the image source 121 is in contact with the lens 133, wherein the definition of the contact between the image source and the lens is that no other optical element with diopter is arranged between the image source and the lens. In this embodiment, the fixed image light valve of the image source 111 contacts the lens 131, which is an example.

Based on the above, since the usher lamp 100 according to an embodiment of the present invention employs the lens array, the image source can be substantially overlapped on the optical path downstream of the focusing lens group 140, so that the usher lamp 100 according to the present invention has an advantage of small volume. In addition, since the lens array 130 is adopted in the greeting lamp 100 according to the embodiment of the invention, a lens with an optical axis deviating from the image source may not be adopted, so that the volume of the greeting lamp is smaller, and the overall volume is less increased with the increase of the number of the image sources, and the cost can be further reduced.

However, the present invention is not limited to the number of lens arrays of the usher lamp in the above related embodiments, and therefore, in another example of the present invention, the usher lamp may be configured with the lens arrays according to the need of the light path. In another embodiment of the present invention, the greeting lamp may also be provided with a plurality of image sources (for example, fig. 2 shows a plurality of image sources) according to design requirements, and a plurality of lenses are correspondingly arranged on the lens array, so that the image sources can substantially overlap with the optical path downstream of the focusing lens after passing through the focusing lens. In addition, the present invention also does not limit the number of the focusing lenses, or the focusing lenses may be a lens group, and thus, the focusing lenses may include a plurality of lenses having different refractive powers as long as the focusing lenses thereof have positive refractive power as a whole.

Specifically, fig. 2 is a schematic diagram illustrating a greeting lamp according to another embodiment of the present invention. Referring to fig. 2, in another embodiment of the invention, the lens array 130 of the greeting lamp 200 includes an array lens 270 and an array lens 280, and a surface 271 (referred to as a first surface) and a surface 281 (referred to as a second surface) are respectively provided.

Surface 271 includes a plurality of sub-lens faces 232 (which may be referred to as a plurality of first sub-lens faces) and surface 281 includes a plurality of sub-lens faces 234 (which may be referred to as a plurality of second sub-lens faces). Wherein, the surface 271 and the surface 281 shown in fig. 2 are the surfaces of the array lens 270 and the array lens 280, respectively, the array lens 270 and the array lens 280 are both in the form of a single element, and the array lens 270 and the array lens 280 are separated from each other without being connected to each other, and are two fly-eye lenses, respectively. However, the invention is not limited thereto, and the array lens 270 and the array lens 280 may be replaced by a single element type array lens as shown in fig. 1 and fig. 3.

In addition, in this embodiment, the array lens 270 and the array lens 280 may be in the form of a single element, and may alternatively be composed of a plurality of sub-lenses. For example, the array lens 280 may include a plurality of individual sub-lenses, and the array lens 270 is in the form of a single element, or vice versa. When the array lens 280 includes a plurality of independent sub-lenses, the separated sub-lenses can be embedded in a plastic frame. Referring to fig. 2, it can be seen that the surface 281 is disposed between the surface 271 and the focusing lens group 140, wherein a sub-lens surface 232a and a sub-lens surface 234a corresponding to the downstream of the optical path of the image source 111 are two refractive surfaces of the lens 131, a sub-lens surface 232b and a sub-lens surface 234b corresponding to the downstream of the optical path of the image source 121 are two refractive surfaces of the lens 133, the sub-lens surface 234a forming the lens 131 is disposed at the focal point of the sub-lens surface 232a forming the lens 131, and the sub-lens surface 234b forming the lens 133 is disposed at the focal point of the sub-lens surface 232b forming the lens 133.

And the optical path design, such as the optical paths of the image source 111 and the image source 121. The light 112 emitted from the image source 111 sequentially passes through the sub-lens surface 232a, the sub-lens surface 234a and the focusing lens group 140 to form an image on the downstream optical path of the focusing lens group 140, and the light 122 emitted from the image source 121 sequentially passes through the sub-lens surface 232b, the sub-lens surface 234b and the focusing lens group 140 to form an image on the downstream optical path of the focusing lens group 140, wherein the optical paths of the image source 111 and the image source 121 in front of the focusing lens group 140 are independent from each other, and the image of the image source 111 and the image of the image source 121 substantially overlap on the downstream optical path of the focusing lens group 140.

Similarly, the greeting lamp 200 in the present embodiment can be electrically connected to the plurality of image sources through the controller 160 as shown in fig. 1, so as to control at least one of the plurality of image sources to emit light. The patterns of the plurality of image sources are the same with each other, or the pattern of at least one of the image sources is different from the patterns of other image sources. Therefore, the usher lamp 200 in this embodiment can control the plurality of image sources to emit light simultaneously or at least one of the image sources to emit light through the controller, so that the usher lamp 200 can project a combination of a plurality of different patterns through the controller, and different brightness changes can be generated by projecting the same pattern.

It should be noted that the centers of the image sources shown in fig. 1 and 2 are both facing the light emitting direction. Specifically, however, the center of the image source should be the transmission direction toward the optical path, for example, as shown in fig. 3, fig. 3 simply shows the image source 111 and the image source 121 relative to the sub-lens surface 232, the sub-lens surface 234 and the focusing lens group 140, wherein the centers of the image source 111 and the image source 121 are both the transmission direction toward the optical path.

In summary, the usher lamp according to the embodiment of the invention employs the lens array, so that the image source can be substantially overlapped with the downstream of the optical path of the focusing lens after passing through the lens array, and the lens array is in a single element form or is embedded in a plastic frame, thereby the usher lamp has an advantage of small volume. In addition, the welcome lamp of the embodiment of the invention adopts the lens array, and does not adopt a lens with an optical axis deviating relative to the image source, so that the welcome lamp is smaller in volume, the whole volume is not increased along with the increase of the number of the image sources, and the cost can be further reduced. In addition, the greeting lamp of the embodiment of the invention can project a plurality of different combinations of patterns through the controller, and can generate different brightness changes by projecting the same patterns.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A welcome light comprising:

a first image source;

a second image source;

the lens array is provided with a first lens and a second lens, the first lens has positive diopter and is arranged at the downstream of the optical path of the first image source, and the second lens has positive diopter and is arranged at the downstream of the optical path of the second image source; and

and the focusing lens is arranged at the downstream of the optical paths of the first lens and the second lens simultaneously, wherein the optical paths of the first image source and the second image source in front of the focusing lens are mutually independent, and the image of the first image source and the image of the second image source are substantially overlapped at the downstream of the optical path of the focusing lens.

2. A welcome light comprising:

a first optical element group comprising:

a first image source; and

a first lens disposed in an optical path downstream of the first image source;

a second optical element group comprising:

a second image source; and

a second lens disposed in an optical path downstream of the second image source; and

the lens is provided with a positive diopter and is arranged at the downstream of the optical paths of the first optical element group and the second optical element group;

the first lens and the second lens are in a single element form, and the first optical element group and the second optical element group have substantially the same imaging position through the lenses.

3. A welcome light comprising:

a first image source;

a second image source;

and the focusing lens is arranged at the downstream of the optical paths of the first lens and the second lens, wherein the optical paths of the first image source and the second image source in front of the focusing lens are mutually independent, and the distance between the center of the first image source and the center of the second image source after being imaged by the focusing lens is less than 5 mm.

4. The greeting lamp of claim 1, 2 or 3, wherein the first image source is in contact with the first lens and the second image source is in contact with the second lens.

5. The greeting lamp of claim 1, 2 or 3, wherein the first image source and the second image source are each a slide show with a backlight.

6. The greeting lamp of claim 1 or 3, wherein the first lens and the second lens are separate elements and embedded in a fixed frame.

7. A welcome lamp as claimed in claim 1 or 3 wherein said first lens and said second lens are in the form of a single element.

8. The greeting lamp of claim 1, 2 or 3, wherein the center of the first image source is located on the optical axis of the first lens and the center of the second image source is located on the optical axis of the second lens.

9. The welcome light in accordance with claim 1, 2 or 3 wherein the lens array comprises:

a first surface comprising a plurality of first sub-lens faces; and

a second surface including a plurality of second sub-lens surfaces, the second surface being disposed between the first surface and the focusing lens, wherein a first sub-lens surface and a second sub-lens surface corresponding to a downstream of an optical path of the first image source are both dioptric surfaces of the first lens, a first sub-lens surface and a second sub-lens surface corresponding to a downstream of an optical path of the second image source are both dioptric surfaces of the second lens, the second sub-lens surface forming the first lens is disposed at a focal point of the first sub-lens surface forming the first lens, and the second sub-lens surface forming the second lens is disposed at a focal point of the first sub-lens surface forming the second lens.

10. The courtesy light of claim 1, 2 or 3, further comprising a controller electrically connected to the first image source and the second image source and configured to control one of the first image source and the second image source to emit light or control the first image source and the second image source to emit light simultaneously, wherein a pattern of the first image source is the same as or different from a pattern of the second image source.