TWI654105B - Puddle lamp - Google Patents

Abstract

A welcome light includes 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 a positive power and is disposed downstream of the light path of the first image source. The second lens has a positive power and is disposed downstream of the light path of the second image source. The focusing lens is disposed 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 independent of each other, and the images of the first image source and the image of the second image source Substantially overlapping the optical path of the focusing lens.

Description

Welcome light

The present invention relates to a luminaire, and more particularly to a welcoming lamp.

In general, the welcome light (also known as the ground light) is used for auxiliary lighting purposes, for ground lighting or for travel lighting under low ambient light. For example, a welcome light for a car is usually mounted on a door or a rear view mirror. When the door is opened, the illumination function is turned on and the image is projected on the ground, which not only produces unique and dazzling image light and projected images, such as a low environment at night. Under the light, the function of illuminating the ground is also provided when the door is opened, so that the person getting on and off can pay attention to the ground condition without accidentally stepping on the dirt, puddles or other dangerous terrain on the ground.

The principle of the conventional welcome lamp is to use the deviation between the optical axis of the projection lens group and the optical axis of the image source to make the projected image sources overlap each other. However, the conventional welcome lamp must consider the deviation between the optical axis of the above-mentioned projection lens group and the optical axis of the image source, so that the volume of the welcome lamp cannot be further reduced, and if the number of image sources is further increased, It is necessary to increase the number of projection lenses correspondingly, which not only makes the volume of the lamp further increased, but also increases the manufacturing cost.

In one embodiment of the invention, a welcome lamp is provided, the volume of which can be further reduced and has a lower cost.

The welcome lamp of an embodiment of the invention includes at least two image sources, a lens array and a focusing lens. The lens array includes at least two lenses, and both lenses have positive refracting power, and the two lenses are respectively disposed downstream of the optical paths of the two image sources. The focusing lens is disposed downstream of the optical paths of the two lenses, wherein the optical paths of the two image sources before the focusing lens are independent of each other, and the images of the two image sources substantially overlap the optical path of the focusing lens.

A welcome lamp according to an embodiment of the invention includes at least two sets of optical elements and a lens disposed outside the optical element set. Each optical component group includes an image source and a lens, and the lens in the optical component group is disposed downstream of the optical path of the image source. The lens disposed outside the optical element group has positive refractive power and is disposed downstream of the optical paths of the two optical element groups. Wherein, each of the two sets of optical element groups is the same piece element and is in the form of a single element, and the two sets of optical element groups have substantially the same imaging position through the lens disposed outside the optical element group.

The welcome lamp of an embodiment of the invention includes at least two image sources, a lens array and a focusing lens. The lens array includes two lenses with positive refracting power, and the two lenses are respectively disposed downstream of the optical path of the corresponding image source. The focusing lens is disposed downstream of the optical path of each of the lenses, and the optical paths of the respective image sources in front of the focusing lens are independent of each other, and each of the image sources has a center point, and the center point of each image source is imaged through the focusing lens. The distance at the imaging position is less than 5 mm.

Based on the above, the welcome lamp in an embodiment of the present invention employs a lens array such that the image source can substantially overlap the optical path of the focus lens, thereby making the welcome lamp of the present invention have the advantage of being small in size. In addition, since the welcoming lamp in one embodiment of the present invention adopts a lens array, and the lens whose optical axis deviates from the image source is not used, the volume of the welcoming lamp is small, and as the number of image sources increases, the overall The volume will not increase, and the cost can be further reduced.

The above described features and advantages of the invention will be apparent from the following description.

Only the features are emphasized, and Figures 1 and 2 of the present invention are not drawn to scale, and Figure 3 is adjusted relative to the ratios of Figures 1 and 2. FIG. 1 is a schematic diagram of a welcome lamp according to an embodiment of the invention. Referring to FIG. 1 , in the present embodiment, the welcome lamp 100 includes an image source 111 , an image source 121 , a lens array 130 , a focus lens group 140 , and a controller 160 .

In this example, image source 111 (which may be referred to as a first image source) and image source 121 (which may be referred to as a second image source) are respectively a combination of devices or elements that provide an image beam. The image source 111 and the image source 121 may respectively include a backlight and a fixed image light valve. The backlight provides an illumination beam, and the backlight may be a packaged LED emitting module, a packaged laser module, or an output lamp such as a fluorescent lamp or an electric heating lamp. Device or component. In this example, the backlight includes a packaged LED module. A fixed image light valve can convert illumination light into a device or component that includes image light of a fixed and unchangeable pattern, such as a black and white, monochrome or color slide, a negative, and a light transmissive portion having a specific shape. A sheet metal (for example, a metal) or a plastic sheet (for example, a metal), and a fixed image light valve that converts illumination light into image light does not consume power. In this example, the fixed image light valve is a slide film, and the slide film is a transparent film carrying a specific pattern. When the light passes through a specific pattern, it is partially absorbed, blocked or reflected, and allows some light to pass through. To form a pattern. In addition to the foregoing design, the image source 111 and the image source 121 may also be active image light output devices, for example, an organic light emitting diode screen composed of a plurality of light emitting pixels, and the present invention does not limit.

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). Lens array 130 can be a single component that includes a plurality of refractive surfaces arranged in an array. That is, the lens array 130 may be integrally formed and made of a single element made of the same material and in one piece form.

For example, the lens array 130 in this embodiment is an array lens, such as a fly-eye lens. At this time, the lens 131 and the lens 133 are respectively referred to as sub-lens units (Cells) including the entrance and exit surfaces on the array lens. For example, the aforementioned fly-eye lenses are arranged in an n*m matrix, and either n, m may be 1 or more, and the other is 2 or more. That is, when the lens array is a fly-eye lens, it may be arranged in a row of 2 columns, 2 rows and 1 column, or 2 rows and 2 columns. In addition, the surface of the fly-eye lens in the direction of light entrance and exit may be respectively provided with a refractive surface; or alternatively, only one of the surface of the light incident direction or the surface of the light exiting direction may have a refractive structure and the other It is a flat surface. Furthermore, in another embodiment, the lens 131 and the lens 133 may each be a cylindrical lens or a barrel lens, a concave lens, a convex lens, or the lens surface has a different radial direction perpendicular to its optical axis. A spherical or aspherical lens such as a hyperbolic lens having a radius of curvature. Each of the lenses 131 and 133 of each of the above examples has a positive refractive power. Further, the positive or negative values or the values of the diopter of the lens 131 and the lens 133 may be the same or different, and in this example, the diopter value and the positive and negative values of the lens 131 and the lens 133 are the same.

In an embodiment of the invention, the lens 131 and the lens 133 may also be two separate lenses. The lens 131 and the lens 133 are two lenses and can be embedded in a fixed frame for fixing. However, the present invention is not limited thereto, and the lens 131 and the lens 133 may be fixed in other manners.

The focusing lens group 140 in this embodiment may include one or more optical elements, such as lenses, cymbals, mirrors, etc., all of which are exemplified. In the present example, the focusing lens group 140 includes only one focusing lens having a positive diopter and has a positive refractive power, that is, its ability to converge light. In another embodiment, the focusing lens group 140 may also include multiple lenses or optical components without refracting, such as flat glass, etc., and the diopter of each lens included may be positive or negative, but the sum of the diopter is recommended to be 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 controller, and a programmable logic device. (Programmable Logic Device, PLD), other similar devices, or a combination of these devices, but the present invention is not limited thereto. Moreover, in one embodiment, each function performed by controller 160 can be implemented by a plurality of code codes that are stored in memory so that the code can be executed by controller 160. Alternatively, in one embodiment, each function implemented by controller 160 may be performed by one or more circuits, but the invention is not limited to whether each function performed by controller 160 is via software or hardware. Implementation.

Further, the lens 131 has a positive refractive power and is disposed downstream of the optical path of the image source 111. The lens 133 has a positive refractive power and is disposed downstream of the optical path of the image source 121. The focusing lens group 140 is disposed downstream of the optical path of the lens 131 and the lens 133. The optical paths of the image source 111 and the image source 121 in front of the focusing lens group 140 are independent of each other, and the image of the image source 111 and the image of the image source 121 substantially overlap. Downstream of the optical path of the focusing lens group 140.

Therefore, in the light path design, the light 112 emitted by the image source 111 first passes through the lens 131, and then is imaged by the focusing lens group 140 at a position P1 downstream of the optical path of the focusing lens group 140, and the light 122 emitted by the image source 121 is first The lens 133 is further imaged by the focusing lens group 140 at a position P2 downstream of the 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 of each other, and the image of the image source 111 The image of the image source 121 substantially overlaps the optical path of the focus lens group 140.

It is worth mentioning that light is transmitted from the upstream to the downstream of the light path. Therefore, the downstream of the optical path of an element can be understood as the portion of the optical path after the light passes through the element. For example, downstream of the optical path of the image source 111, the optical path after the light is emitted from the image source 111 is referred to as 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, and the lens 140 is downstream of the optical path of the lens 131. ,So on and so forth.

Furthermore, the image of the image source 111 and the image of the image source 121 substantially overlap the optical path of the focusing lens group 140. Specifically, in the geometrical design, the meaning is the center C1 of the image source 111 and the center of the image source 121. The effect of the distance between the imaging position P1 and the imaging position P2 after imaging by the focusing lens group 140 is less than 1 cm, and the effect is acceptable below 5 mm (mm), preferably less than 0.5 mm. The best is in millimeters (mm). In the present embodiment, the welcome lamp 100 can be designed such that 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 each of the aforementioned components can be found in Table 1 below.

Table I  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td> Surface </td><td> Curvature Radius (mm) </td><td> Interval (mm) </td><td> refractive index (nd) </td><td> Abbe number (vd) </td></tr><tr><td> 1 </td><td> Infinite </td><td> 0 </td><td> </td><td> </td></tr><tr><td> 2 </td><td> 3.75 </td ><td> 10.00 </td><td> 1.53 </td><td> 56.28 </td></tr><tr><td> 3 </td><td> -3.75 </td>< Td> 0.20 </td><td> </td><td> </td></tr><tr><td> 4 </td><td> 6.00 </td><td> 2.15 </ Td><td> 1.53 </td><td> 56.28 </td></tr><tr><td> 5 </td><td> 6.13 </td><td> 1000.00 </td>< Td> </td><td> </td></tr></TBODY></TABLE>

3 is a schematic diagram of a plane in which an image source is located with respect to a lens array in an embodiment, and FIG. 3 is drawn according to the actual scale of the product using the structure of FIG. 1 , and the detailed parameters thereof can be referred to Table 1. Referring to FIG. 1 , FIG. 3 and Table 1 , for example, the image source 111 and the image source 121 of the embodiment are the surface 1, the light incident surface of the lens 131 (or the sub-lens surface 232 a of FIG. 3 ) is a surface. 2. The light exit surface of the lens 131 (or the sub-lens surface 234a of FIG. 3) is the surface 3, the light incident surface of the focus lens group 140 is the surface 4, and the light exit surface of the focus lens group 140 is the surface 5, wherein the thickness of the surface is The distance between the surface and the next surface on the light path. In this example, the surface 1 is in contact with the surface 2, so the thickness of the surface 1 is 0, and the surface 1 is the image source, so the radius of curvature of the surface 1 is infinite; in addition, the thickness of the surface 2 in the optical design is 10.00 mm. The radius of curvature is 3.75 mm, the refractive index is 1.53, the Abbe number is 56.28, the thickness of the surface 3 is 0.20 mm, the radius of curvature is -3.75 mm, and the surface 4 has an optical design thickness of 2.15 mm and a radius of curvature of 6.00 mm. The refractive index was 1.53 and the Abbe number was 56.28; while the thickness of the surface 5 was 1000.00 mm (i.e., the distance between the focusing and imaging planes in the focusing lens group 140) and the radius of curvature was 6.13 mm.

From another point of view, referring again to FIG. 1, the welcome lamp 100 in this embodiment includes an optical component group 110 (which may be referred to as a first optical component group) and an optical component group 120 (which may be referred to as a second optical component). Element group) and lens 150.

The optical component 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). The optical component group 120 includes an image source 121 (which may be referred to as a second image source) and a lens 133 ( It can be called a second lens).

The lens 150 in this embodiment may be an optical component having a positive refracting power, such as a lens, a cymbal, etc., both of which are exemplified. In this example, lens 150 is a lens having a positive diopter.

Further, the lens 131 is provided downstream of the optical path of the image source 111. The lens 133 is provided downstream of the optical path of the image source 121. The lens 150 is disposed downstream of the optical path of the optical element group 110 and the optical element group 120. Wherein, the optical element group 110 and the optical element group 120 have substantially the same imaging position via the lens 150. As described above, the optical component group 110 and the optical component group 120 have substantially the same imaging position via the lens 150, specifically, the geometrical optical design, the center C1 of the image source 111 of the optical component group 110, and the optical component group 120. When the center C2 of the image source 121 is imaged by the lens 150 and the distance between the imaging position P1 and the imaging position P2 is less than 2 cm (cm), the effect is acceptable; when less than 5 mm (mm), the effect is good; less than 1 mm ( When mm), the effect is better. In this example, the welcome lamp 100 can be designed such that 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 welcome lamp 100 in the above related embodiments is electrically connected to the image source 111 and the image source 121, and is used to control one of the image source 111 and the image source 121 to emit light, or control the image. The source 111 emits light simultaneously with the image source 121. Where the pattern of the image source 111 is the same or different from the pattern of the image source 121, when the pattern of the image source 111 is the same as the pattern of the image source 121, the purpose of the design is to increase the brightness of the image source, or according to environmental conditions. Project two different brightnesses. When the pattern of the image source 111 is different from the pattern of the image source 121, the controller 160 can control the image source 111 to emit light simultaneously with the image source 121 or one of the light sources (ie, the image source 111 emits light and the image source 121 does not emit light). Or the image source 121 emits light and the image source 111 does not emit light, so the welcome lamp 100 can project three different patterns via the controller 160.

In order to improve the quality of the image source after projection and to minimize the volume of the welcome lamp, the image source 111 is in contact with the lens 131, and the image source 121 is in contact with the lens 133. The definition of the image source in contact with the lens is the image source and the image source. No other optical components with diopter are placed between the lenses. In this example, the fixed image light valve of the image source 111 is in contact with the lens 131, which is an example thereof.

Based on the above, since the welcome lamp 100 according to an embodiment of the present invention employs a lens array, the image source can be substantially overlapped downstream of the optical path of the focus lens group 140, thereby making the welcome lamp 100 of the present invention have the advantage of being small in size. In addition, since the welcome lamp 100 of the embodiment of the present invention adopts the lens array 130, and the lens whose optical axis deviates from the image source is not used, the volume of the welcome lamp is small, and as the number of image sources increases, the whole The volume will not increase, and the cost can be further reduced.

However, the present invention does not limit the number of lens arrays of the welcoming lamps of the above-described related embodiments. Therefore, in another example of the present invention, the welcoming lamp can reconfigure the lens array as needed on the optical path. Moreover, in another example of the present invention, the welcoming lamp can also be provided with a plurality of image sources according to design requirements (for example, a plurality of image sources are illustrated in FIG. 2), and a plurality of lenses are correspondingly disposed on the lens array, so that the image source can be After focusing the lens, it substantially overlaps the optical path of the focusing lens. Further, the present invention is not limited to the number of focus lenses, or the focus lens may be a lens group, and therefore, the focus lens may include a plurality of lenses having different refracting powers as long as the focus lens has positive diopter as a whole.

Specifically, FIG. 2 is a schematic diagram of a welcome lamp according to another embodiment of the present invention. Referring to FIG. 2, in another embodiment of the present invention, the lens array 130 of the welcome lamp 200 includes an array lens 270 and an array lens 280, and is respectively provided with a surface 271 (which may be referred to as a first surface) and a surface 281 ( May be called the second surface).

The surface 271 includes a plurality of sub-lens faces 232 (which may be referred to as a plurality of first sub-lens faces), and the surface 281 includes a plurality of sub-lens faces 234 (which may be referred to as a plurality of second sub-lens faces). The surface 271 and the surface 281 of 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 all in the form of a single element, and the array lens 270 and the array lens 280 are separated from each other. Connected to each other and are two fly-eye lenses. However, the present invention is not limited thereto, and the array lens 270 and the array lens 280 may be replaced by an array lens of a single component as illustrated in FIGS. 1 and 3.

In addition, in this example, the array lens 270 and the array lens 280 can be selectively composed of a plurality of sub-lenses, respectively, in addition to being in a single element form. For example, array lens 280 can include a plurality of individual sub-lenses, and array lens 270 is in the form of a single element, and vice versa. When the array lens 280 includes a plurality of independent sub-lenses, the separate sub-lenses can be embedded in a plastic frame. In addition, 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 optical path of the image source 111 are lenses 131. The two refracting surfaces, a sub-lens surface 232b and a sub-lens surface 234b corresponding to the optical path of the image source 121 are the two refractive surfaces of the lens 133, and the sub-lens surface 234a forming the lens 131 is disposed on the lens 131. At the focus of the sub-lens surface 232a, the sub-lens surface 234b forming the lens 133 is provided at the focus of the sub-lens surface 232b forming the lens 133.

In the light path design, for example, the image source 111 and the optical path of the image source 121. The light rays 112 emitted by the image source 111 are sequentially imaged through the sub-lens surface 232a, the sub-lens surface 234a, and the focusing lens group 140, and are imaged downstream of the optical path of the focusing lens group 140, and the light rays 122 emitted by the image source 121 are sequentially passed through the sub-transmission. The mirror surface 232b, the sub-lens surface 234b, and the focusing lens group 140 are imaged downstream of the optical path of the focusing lens group 140. The optical paths of the image source 111 and the image source 121 in front of the focusing lens group 140 are independent of each other, and the image and image of the image source 111 are The image of the image source 121 substantially overlaps the downstream of the optical path of the focus lens group 140.

Similarly, the welcome lamp 200 in this embodiment can be electrically connected to a plurality of image sources via the controller 160 as shown in FIG. 1 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 as each other, or the pattern of at least one of the image sources is different from the pattern of the other image sources. Therefore, the welcome lamp 200 in this example can control multiple image sources to simultaneously emit light or at least one of them through the controller, so the welcome lamp 200 can project a combination of a plurality of different patterns via the controller, and can utilize the same The projection of the pattern produces different brightness variations.

It is worth mentioning that the image source shown in FIG. 1 and FIG. 2 has the center of the image source facing the light exiting direction. Specifically, the center of the image source should be the direction of the light path. For example, FIG. 3, please refer to FIG. 3. FIG. 3 simply illustrates the image source 111 and the image source 121 with respect to the sub-lens surface 232 and the sub-lens. The mirror 234 and the focus lens group 140, wherein the center of the image source 111 and the image source 121 are all toward the optical path.

In summary, the welcoming lamp of the embodiment of the present invention adopts a lens array, so that the image source can substantially overlap the optical path of the focusing lens after passing through the lens array, and the lens array is in the form of a single component or embedded in a plastic frame. In addition, the welcome lamp of the present invention has the advantage of being small in size. In addition, since the welcome lamp of the embodiment of the present invention adopts a lens array, and the lens whose optical axis deviates from the image source is not used, the volume of the welcome lamp is small, and as the number of image sources increases, the overall volume is larger. Will not increase, and can further reduce costs. In addition, the welcome lamp of the embodiment of the present invention can project a combination of a plurality of different patterns through the controller, and can generate different brightness changes by using the projection of the same pattern.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and any one of ordinary skill in the art can make some changes and refinements without departing from the spirit and scope of the present invention. The scope of the invention is defined by the scope of the appended claims.

100,200‧‧‧ Welcome lights

110, 120‧‧‧ Optical component group

111, 121‧‧‧ image source

112, 122‧‧‧ rays

130‧‧‧ lens array

131, 133, 150‧ ‧ lens

140‧‧‧focus lens group

160‧‧‧ Controller

232, 232a, 232b, 234, 234a, 234b‧‧‧ sub-lens

270, 280‧‧ ‧ array lens

271, 281‧‧‧ surface

C1, C2‧‧‧ Center

P1, P2‧‧‧ imaging position

FIG. 1 is a schematic diagram of a welcome lamp according to an embodiment of the invention. 2 is a schematic diagram of a welcome lamp according to another embodiment of the present invention. 3 is a schematic diagram of a plane in which an image source is located relative to a lens array in an embodiment.

Claims (10)

a welcoming light, comprising: a first image source; a second image source; a lens array, comprising a first lens and a second lens, the first lens having a positive power and a light path disposed at the first image source Downstream, the second lens has a positive power and is disposed downstream of the optical path of the second image source; and a focusing lens is disposed downstream of the optical path of the first lens and the second lens, wherein the first image source and the The optical path of the second image source in front of the focusing lens is independent of each other, and the image of the first image source and the image of the second image source substantially overlap the optical path of the focusing lens. A welcoming light, comprising: a first optical component group, comprising: a first image source; and a first lens disposed downstream of the optical path of the first image source; and a second optical component group comprising: a second An image source; and a second lens disposed downstream of the optical path of the second image source; and a lens having a positive refracting power, the lens being disposed at the same time downstream of the optical path of the first optical component group and the second optical component group; The first lens and the second lens are in the form of a single element, and the first optical element group and the second optical element group have substantially the same imaging position through the lens. a welcoming light, comprising: a first image source; a second image source; a lens array, comprising a first lens and a second lens, the first lens having a positive power and a light path disposed at the first image source Downstream, the second lens has a positive power and is disposed downstream of the optical path of the second image source; and a focusing lens is disposed downstream of the optical path of the first lens and the second lens, wherein the first image source and the The optical paths of the second image source in front of the focusing lens are independent of each other, and the distance between the center of the first image source and the center of the second image source through the imaging lens after imaging by the focusing lens is less than 5 mm. The welcoming lamp of claim 1, wherein the first image source is in contact with the first lens, and the second image source is in contact with the second lens. The welcoming light according to the first, second or third aspect of the patent application, wherein the first image source and the second image source are respectively a slide film matched with a backlight. The welcoming lamp of the first or third aspect of the invention, wherein the first lens and the second lens are separate components and are embedded in a fixed frame. The welcome lamp of claim 1 or 3, wherein the first lens and the second lens are in the form of a single component. The welcoming lamp of claim 1, wherein the center of the first image source is located on an optical axis of the first lens, and the center of the second image source is located at the first On the optical axis of the two lenses. The welcoming lamp of claim 1, wherein the lens array comprises: a first surface comprising a plurality of first sub-lens surfaces; and a second surface comprising a plurality of a second sub-lens surface disposed between the first surface and the focusing lens, wherein a first sub-lens surface and a second sub-lens surface corresponding to the optical path of the first image source are The two refracting surfaces of the first lens, a first sub-lens surface and a second sub-lens surface corresponding to the optical path of the second image source are two refractive surfaces of the second lens, and the first lens is formed The second sub-lens surface is disposed at a focus of the first sub-lens surface forming the first lens, and the second sub-lens surface forming the second lens is disposed on the first sub-perforation forming the second lens The focus of the mirror. The welcoming light according to the first, second or third aspect of the patent application, further comprising a controller electrically connected to the first image source and the second image source, and configured to control the first The image source and the second image source emit light, or control the first image source to emit light simultaneously with the second image source, wherein the pattern of the first image source is the same or different from the pattern of the second image source.