Image display puddle lamp device

Abstract

To provide a paddle lamp device for image display capable of making a displayed image sharper while functioning as a paddle lamp to improve resolving power.SOLUTION: A paddle lamp device for image display includes a housing, illumination system lenses which are built in the housing and arrayed one after another in one direction, an image film, and a plurality of image formation system lens, at least one of the plurality of image formation system lenses using a COP (Cycloolefin polymer) raw material. According to the present invention, while the paddle lamp device functions as a paddle lamp, a displayed image can be made sharper and resolving power can be improved.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a puddle lamp device for a vehicle, and more particularly to a puddle lamp device capable of displaying an image such as a vehicle logo image. [Background technology]

[0002] The present invention relates to a logo lamp that projects a light pattern adjacent to a vehicle. The logo lamp is attached to the exterior of a vehicle, such as a door or side mirror, and illuminates an image in the bottom area adjacent to the vehicle. The logo lamp may include a mask that enables the projection of an image logo pattern adjacent to the vehicle. The logo lamp typically comprises a lens, an image pattern mask, a housing, and a light source, and the lens material and shape are optimized to illuminate the logo image in the bottom area adjacent to the vehicle. As examples of prior art, Korean Patent Publication No. 10-2019-0042467 is a technology relating to the configuration and design of an assembly device that facilitates the replacement of housings and components within a logo lamp, and Korean Patent Registration No. 10-1360433 is a technology relating to a logo lamp that functions as a puddle lamp and displays a vehicle-specific logo on the ground, focusing on improving the vehicle's luxury image and marketability by fading the boundary between the illuminated area and non-illuminated area on the ground. However, both prior art technologies had limitations in image resolution. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Korean Patent Publication No. 10-2019-0042467 [Patent Document 2] Korean Patent No. 10-1360433 Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a puddle lamp device for image display that can display images more clearly and improve resolution while functioning as a puddle lamp. [Means for solving the problem]

[0005] The puddle lamp device for image display according to the present invention includes a housing, an illumination lens, an image film, and a plurality of imaging lenses that are built into the housing and arranged sequentially in one direction, and at least one of the imaging lenses is made of COP (Cycloolefin polymer) material.

[0006] Here, at least one of the plurality of imaging lenses is made of a PC (Polycarbonate) material.

[0007] The plurality of imaging lenses is three or more, and the plurality of imaging lenses includes two or more imaging lenses made of COP (Cycloolefin polymer) material.

[0008] The plurality of imaging lenses include a first imaging lens, a second imaging lens, and a third imaging lens, which are sequentially arranged in a direction away from the image film, and the first imaging lens is made of a COP (Cycloolefin polymer) material.

[0009] The second imaging lens is made of a PC (Polycarbonate) material, and the third imaging lens is made of a COP (Cycloolefin polymer) material.

[0010] The plurality of imaging lenses is three or more, and the plurality of imaging lenses includes two or more imaging lenses made of PC (Polycarbonate).

[0011] Meanwhile, the illumination lens is characterized in that a plurality of illumination lenses made of PC (Polycarbonate) material are arranged.

[0012] The imaging system may further include a spacer disposed between the illumination lens and the plurality of imaging lenses, on which the image film is placed.

[0013] The spacer has an edge portion extending downward from its outer periphery, and the illumination lens has a spacer portion extending upward from its outer periphery, and the spacer portion is inserted into the edge portion.

[0014] The optical system may further include a spacer disposed between the illumination lens and the plurality of imaging lenses, on which the image film is placed, and an opening is formed on a side of the housing, the opening being formed at a position where the spacer can be removed.

[0015] The housing is made of a heat-dissipating plastic material containing a carbon-based additive.

[0016] Another puddle lamp device for image display according to the present invention includes a housing, an illumination lens, an image film, and a plurality of imaging lenses that are built into the housing and arranged sequentially in one direction, and the plurality of imaging lenses include at least one imaging lens having an Abbe's number different from that of the other imaging lenses.

[0017] The plurality of imaging lenses include imaging lenses made of PC (Polycarbonate) material and imaging lenses made of COP (Cycloolefin polymer) material.

[0018] Here, the plurality of imaging lenses include two or more imaging lenses made of a COP (Cycloolefin polymer) material.

[0019] Furthermore, the plurality of imaging lenses include a first imaging lens, a second imaging lens, and a third imaging lens arranged in sequence in a direction away from the image film, and the first imaging lens is made of COP (Cycloolefin polymer) material.

[0020] The second imaging lens is made of a PC (Polycarbonate) material, and the third imaging lens is made of a COP (Cycloolefin polymer) material.

[0021] The housing is made of a heat-dissipating plastic material containing a carbon-based additive.

[0022] The housing further includes a spacer disposed between the illumination lens and the plurality of imaging lenses, on which the image film is placed, and an opening is formed on a side of the housing, and the opening is formed at a position where the spacer can be removed. [Effects of the Invention]

[0023] The image display puddle lamp device of the present invention uses a combination of lens materials with different Abbe numbers to display images and logos with high resolution and clarity without chromatic aberration. Furthermore, the heat-dissipating plastic housing ensures heat dissipation performance without the need for an expensive metal housing and heat sink. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is an exploded view of an image display puddle lamp device of the present invention. [Figure 2]1 is a diagram showing a side cross-sectional shape of an image display puddle lamp of the present invention. FIG. [Figure 3] FIG. 2 is a diagram showing a lens configuration of Comparative Example 1. [Figure 4] FIG. 10 is a diagram showing a display image according to Comparative Example 1. [Figure 5] FIG. 10 is a diagram showing a lens configuration of Comparative Example 2. [Figure 6] FIG. 10 is a diagram showing a display image according to Comparative Example 2. [Figure 7] FIG. 1 is a diagram showing a lens configuration according to an embodiment of the present invention. [Figure 8] 10A and 10B are diagrams illustrating display images according to an embodiment of the present invention. [Figure 9] 1 is a schematic diagram of heat conduction through a heat-dissipating plastic material. [Figure 10] This figure shows the heat dissipation evaluation of a housing made of heat-dissipating plastic material and a housing made of PC material. [Figure 11] FIG. 10 is a diagram showing the heat dissipation evaluation of a housing made of PC material. [Figure 12] FIG. 10 is a diagram showing the heat dissipation evaluation of a housing made of a heat dissipating plastic material. [Figure 13] 1 is a diagram showing a side cross-sectional shape of an image display puddle lamp device according to an application example of the present invention. [Figure 14] 1 is a perspective view of an image display puddle lamp device according to an application example of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0025] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0026] Fig. 1 is an exploded view of an image display puddle lamp device of the present invention, and Fig. 2 is a side cross-sectional view of the image display puddle lamp of the present invention. Hereinafter, an image display puddle lamp device according to one embodiment of the present invention will be described with reference to Figs. 1 and 2. The present invention is a puddle lamp device that is attached to the exterior of an automobile, such as a door or side mirror, to illuminate an image in the bottom area adjacent to the vehicle. The housing 110 houses an illumination lens, an image film, and an imaging lens, and the shape of the image film is displayed on the exterior of the automobile by light from a light source.

[0027] A puddle lamp device combines multiple lenses. Unlike existing logo lamps, which use lenses made of only one material, the present invention combines multiple imaging lenses made of materials with different Abbe's numbers. The Abbe number indicates the properties of light dispersion in a transparent medium, and the higher the Abbe number, the less chromatic aberration there is. While existing lenses made of a single material can cause chromatic aberration in the displayed image and reduce resolution, the present invention uses mixed lenses in the imaging system, resulting in clear, high-resolution images and logo shapes without chromatic aberration.

[0028] More specifically, the housing 110 is composed of a barrel 111 and a cap 112, with a light source disposed between the barrel 111 and the cap 112, and lenses arranged in the internal space of the barrel 111. That is, a PCB with a light source attached thereto is coupled to one end of the barrel 111, and light is emitted through an illumination port at the other end. The lenses are arranged in the order of an illumination system lens, an image film 130, and an imaging system lens from the light source toward the illumination port, and the illumination system lens is composed of multiple lenses. A first illumination system lens 121 and a second illumination system lens 122 are arranged in sequence. The first illumination system lens 121 and the second illumination system lens 122 may be made of PC (Polycarbonate) material.

[0029] A spacer 140 is provided between the illumination system lens and the imaging system lens to position and space the image film 130. The spacer 140 has an edge extending downward from the periphery as shown, and the second illumination system lens 122 is arranged to be inserted into the edge, so that the image film 130 is placed and supported. That is, a plurality of lenses are arranged in a stack, and the second illumination system lens 122 has a spacer portion 122-1 extending vertically from the periphery as shown to couple with the spacer 140, and the other stacked lenses also have such spacer portions to facilitate stack assembly.

[0030] Next, the imaging system lens may be a plurality of lenses arranged in sequence, and may be three or more lenses. However, in the present invention, an example is given of a configuration consisting of three imaging system lenses, namely, a first imaging system lens 151, a second imaging system lens 152, and a third imaging system lens 153, arranged in sequence. The three or more imaging system lenses may include an imaging system lens made of COP material. COP is a cycloolefin polymer (COP) that has a larger Abbe number than PC material. That is, the imaging system lens is composed of a combination of an imaging system lens made of COP material and an imaging system lens made of PC material, and by adjusting the total Abbe number, chromatic aberration is reduced. Furthermore, there may be a plurality of imaging system lenses made of COP material, or a plurality of imaging system lenses made of PC material may be arranged, and an arrangement of a plurality of imaging system lenses made of COP material is more preferable.

[0031] In one embodiment of the present invention, an imaging system lens is exemplified, which is a combination of two COP lenses and one PC lens. In this example, in order from closest to the light source, the first imaging system lens 151 is made of COP material, the second imaging system lens 152 is made of PC material, and the third imaging system lens 153 is made of COP material. When two COP lenses and one PC imaging system lens are arranged in the order COP-COP-PC or PC-COP-COP, chromatic aberration can be reduced effectively, but an arrangement in the order COP-PC-COP, as in this embodiment of the present invention, is more effective.

[0032] The following provides a more detailed explanation through comparison with comparative examples and optical simulations. Comparative Example 1 (Figures 3 and 4) is the result of an optical simulation conducted using only PC, a material commonly used in existing logo lamps. Comparative Example 2 (Figures 5 and 6) is the result of a simulation conducted using only COP lenses, which is a more expensive material than PC but has better projection properties and is widely used in precision structures. In both Comparative Examples 1 and 2, the use of a single material results in different levels of chromatic dispersion depending on the material's inherent ABBE number, which in turn results in different levels of chromatic aberration. The PC material used in Comparative Example 1 has a small ABBE number of approximately 23 to 35, which is classified as a negative type. The COP used in Comparative Example 2 has a large ABBE number of approximately 45 to 58, which is classified as a positive type.

[0033] The larger the ABBE number, the smaller the chromatic dispersion, and the smaller the ABEE number, the larger the chromatic dispersion. Therefore, the image in Comparative Example 2, which used a COP with a high ABEE number, had less chromatic aberration than the image in Comparative Example 1. While it is possible to reduce chromatic aberration by using a material with a high ABBE number, it is also possible to use materials with favorable dispersion in different lens configurations. By combining two materials with different ABBE numbers, a high-resolution lamp with almost no chromatic aberration can be manufactured, as in Example 1 (Figures 7 and 8). In this case, in the combination of imaging lenses, the positive lens generates undercorrected chromatic aberration, while the negative lens overcorrects this aberration. To balance and eliminate the aberrations of the two lenses, a positive lens was combined with a negative lens with a lower refractive power. The positive lens was made of a positive material with low chromatic dispersion, and the negative lens was made of a negative material with high dispersion. The present invention also uses a heat-dissipating plastic for the housing 110 to prevent a drop in resolution due to heat generation, ensuring heat dissipation performance without using an expensive metal housing and heat sink, thereby achieving high-resolution images.

[0034] Figure 9 is a schematic diagram of heat conduction through heat-dissipating plastic material. Figures 10, 11, and 12 are diagrams showing heat dissipation evaluations of housings made of heat-dissipating plastic material and PC material. Comparative Example 1 is a sample in which the housing (barrel and cap) is made using PC material, which is mainly used in existing logo lamps. In Example 1, the sample is made of a housing made of heat-dissipating plastic material that has heat dissipation performance equivalent to that of metal materials such as aluminum.

[0035] As shown in Figure 9, heat-dissipating plastic differs from existing PC materials in that it is a PA6 plastic-based material with the addition of highly conductive carbon-based additives such as graphene, graphite, and carbon fiber, significantly improving thermal conductivity. Figure 10 shows the results of an LED junction temperature evaluation graph and thermal imaging camera image inside a lamp device, which confirms the actual performance of a PC housing and a heat-dissipating plastic housing with heat dissipation performance comparable to that of metal materials such as aluminum. As can be seen from the LED junction temperature evaluation, when heat-dissipating plastic is used, the LED junction temperature is approximately 10 to 20 degrees lower than in a logo lamp made of general PC material, indicating that damage to the LEDs is prevented and more heat is dissipated from within.

[0036] Also, as can be seen from the thermal camera images of PC material in Figure 11 and heat-dissipating plastic material in Figure 12, when heat-dissipating plastic is used, a lot of heat is released overall, minimizing the heat contained within the logo lamp. The reason this result is important is that all materials have a thermal expansion coefficient and the degree to which they expand at high temperatures varies, but if a plastic lens expands at high temperatures, the lens values ​​will go out of sync and the resolution will decrease, so the heat dissipation properties that efficiently release internal heat in a logo lamp are an extremely important factor.

[0037] Next, FIG. 13 is a side cross-sectional view of a puddle lamp device for image display according to an application example of the present invention, and FIG. 14 is a perspective view of the puddle lamp device for image display according to an application example of the present invention. Like the above-described embodiment of the present invention, the puddle lamp device for image display according to the present invention includes a housing 210, a first illumination system lens 221, a second illumination system lens 222, an image film 230, a spacer 240, a first imaging system lens 251, a second imaging system lens 252, and a third imaging system lens 253. In particular, an opening o is formed in the housing 210 at a position corresponding to the second illumination system lens 221 and the spacer 240, and a cover for opening and closing the opening o may be added. The opening o allows for easy removal of the second illumination system lens 222, the image film 230, and the spacer 240, allowing for easy replacement with a desired image film. As described above, the puddle lamp device for image display according to the present invention minimizes color dispersion of the image and improves heat dissipation performance by combining imaging system lenses with different Abbe numbers, thereby enhancing resolution.

[0038] Although the invention has been described with reference to the illustrated drawings, it will be obvious that it is not limited to these embodiments and that modifications and variations are possible. [Explanation of symbols]

[0039] 110 Housing 111 barrels 112 Cap 121 First illumination lens 122 Second illumination lens 122-1 Spacer part 130 Image Film 140 spacer 151 First imaging lens 152 Second imaging lens 153 Third imaging lens

Claims

1. Housing and an illumination lens, an image film, and a plurality of imaging lenses, which are housed in the housing and arranged sequentially in one direction; At least one of the plurality of imaging lenses is made of a cycloolefin polymer (COP) material, the plurality of imaging lenses include a first imaging lens, a second imaging lens, and a third imaging lens, which are sequentially arranged in a direction away from the image film; the first imaging lens is made of a COP (Cycloolefin polymer) material, the second imaging lens is made of a PC (Polycarbonate) material, The third imaging lens is made of a COP (Cycloolefin polymer) material.

2. 2. The image display puddle lamp device according to claim 1, wherein the illumination lens is an array of a plurality of illumination lenses made of PC (Polycarbonate).

3. 2. The image display puddle lamp device according to claim 1, further comprising a spacer disposed between the illumination lens and the plurality of imaging lenses, on which the image film is placed.

4. The spacer has an edge portion extending downward from its outer periphery, the illumination lens has a spacer portion formed thereon that extends upward from its outer periphery, 4. The image display puddle lamp device according to claim 3, wherein the spacer portion is inserted into the edge portion.

5. An opening is formed in a side surface of the housing, 4. The image display puddle lamp device according to claim 3, wherein the opening is formed at a position where the spacer can be removed.

6. 2. The image display puddle lamp device according to claim 1, wherein the housing is made of a heat-dissipating plastic material to which a carbon-based additive is added.

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