Vehicle lamp structure

Abstract

This invention relates to a vehicle lamp structure, in which an optical coating is formed on the incident or exit surface of the light-shaping element of the vehicle lamp or on the incident surface of the transparent lamp cover. The optical coating consists of a layered structure with at least four layers, formed by alternately stacking silicon dioxide (SiO₂) layers and ceramic oxide layers. The silicon dioxide layer serves as the contact layer with the light-shaping element or the transparent lamp cover. Accordingly, the optical coating can increase or decrease the reflectance of light at specific wavelengths in the light source, thereby altering the color temperature of the final projected light from the vehicle lamp to comply with regulatory requirements.

Description

Technical Field

[0001] This invention relates to a vehicle lamp structure, and more particularly to a structure that can reflect some wavelengths of light from the original light source of the vehicle lamp using an optical coating, or increase or decrease the reflectivity of some wavelengths of light, so as to change the color temperature of the light ultimately projected by the vehicle lamp. Prior Technology

[0002] Vehicle lights are a crucial component for safe driving. Therefore, specific specifications such as light shape and color temperature are formulated for vehicle lights used for different purposes. For example, headlights, turn signals, brake lights, reversing lights, third brake lights, fog lights, etc., all have different light shape or color temperature specifications due to their different functions.

[0003] For headlights, a color temperature of 4,200 K is already similar to sunlight. If the color temperature reaches 8,000 K or 12,000 K, it is severely biased towards blue light. Within the visible light range of the human eye, blue light has the shortest wavelength and is the easiest to scatter, resulting in poor penetration. Therefore, it is easy to cause poor illumination in bad weather, which may make it difficult for road users to identify road conditions and increase the danger of driving.

[0004] Furthermore, all types of vehicle lights obtain the required color temperature by passing the light source through the lamp cover. Therefore, if the selected light source itself has an error in the wavelength of light emitted, the color temperature of the light obtained after passing through the lamp cover will be different, which will affect the color temperature of the light ultimately projected by the vehicle lights and make it unable to meet the relevant regulations.

[0005] In view of this, the inventor has developed a device that can increase the reflectivity of light in the original light source that does not meet the regulations, or reduce the reflectivity of light in the original light source that does meet the regulations, through the setting of optical coating, so that the wavelength or color temperature of the light ultimately projected by the original light source can meet the relevant vehicle lighting regulations. Summary of the Invention

[0006] In view of the above-mentioned prior art, the object of the present invention is to provide a vehicle lamp structure that, through optical coating, can increase the reflectivity of light in the original light source that does not meet the regulatory requirements for wavelength bands, or reduce the reflectivity of light in the original light source that does meet the regulatory requirements for wavelength bands, so that the wavelength or color temperature of the light ultimately projected by the original light source meets the requirements.

[0007] The above-mentioned objective of this invention is achieved by the following techniques:

[0008] A vehicle headlight structure includes a base, at least one light source, a lampshade, and an optical coating. The base and the lampshade are correspondingly mounted, the light source is disposed on the base, and the lampshade is located in the light path of the light source. The surface of the lampshade facing the light source is the light-incident surface, and the surface away from the light source is the light-emitting surface. The lampshade is an optical element with light shape conversion. The optical coating is disposed on the light-incident surface of the lampshade. The optical coating comprises a layered structure consisting of at least four layers of silicon dioxide (SiO2) layers and ceramic oxide layers stacked alternately. The silicon dioxide layers are adjacent to the light-incident surface of the lampshade. The layered structure formed by the optical coating can increase or decrease the reflectivity of light of a specific wavelength in the light source.

[0009] As described above, in the vehicle headlight structure, the light source is mounted on a substrate, and the substrate is fixed to the base.

[0010] The objectives of the present invention described above can also be achieved by the following techniques:

[0011] A vehicle headlight structure includes a base, at least one light source, a lampshade, an optical coating, and a light-generating element. The base and the lampshade are correspondingly mounted. The light source is disposed on the base, and the light-generating element is disposed between the light source and the lampshade, with the lampshade and the light-generating element located in the optical path of the light source. The surface of the light-generating element facing the light source is the light-incident surface, and the surface of the light-generating element away from the light source is the light-exit surface. The optical coating is disposed on the light-incident surface of the light-generating element. The optical coating comprises a layered structure consisting of at least four layers of silicon dioxide and ceramic oxide layers stacked alternately, with the silicon dioxide layers adjacent to the light-incident surface of the light-generating element. The layered structure formed by the optical coating can increase or decrease the reflectivity of light of a specific wavelength in the light source.

[0012] As described above, in the vehicle headlight structure, the light source is mounted on a substrate, and the substrate is fixed to the base.

[0013] The objectives of the present invention described above can also be achieved by the following techniques:

[0014] A vehicle headlight structure includes a base, at least one light source, a lampshade, an optical coating, and a light-generating element. The base and the lampshade are correspondingly mounted. The light source is disposed on the base, and the light-generating element is disposed between the light source and the lampshade, with the lampshade and the light-generating element located in the optical path of the light source. The surface of the light-generating element facing the light source is the light-incident surface, and the surface of the light-generating element away from the light source is the light-exiting surface. The optical coating is disposed on the light-exiting surface of the light-generating element. The optical coating comprises a layered structure consisting of at least four layers of silicon dioxide and ceramic oxide layers stacked alternately, with the silicon dioxide layers adjacent to the light-exiting surface of the light-generating element. The layered structure formed by the optical coating can increase or decrease the reflectivity of specific wavelengths of light in the light source.

[0015] As described above, in the vehicle headlight structure, the light source is mounted on a substrate, and the substrate is fixed to the base.

[0016] The advantages of this invention are:

[0017] This invention provides an optical coating on the light-incident or light-exiting surface of the light-generating element of a vehicle lamp, or on the light-incident surface of the lamp's light-transmitting cover. By increasing or decreasing the reflectivity of specific wavelengths of light in the light source after passing through the optical coating, the color temperature (or wavelength) of the light ultimately projected by the vehicle lamp can be changed to comply with vehicle lamp regulations. This design ensures that even if the color temperature (or wavelength) of the light source used in the vehicle lamp does not meet the vehicle lamp specifications, the color temperature (or wavelength) of the light ultimately projected by the vehicle lamp still meets the vehicle lamp specifications. Simple Explanation of the Diagram

[0018] [Figure 1] An exploded perspective view of a vehicle headlight according to a preferred embodiment of the present invention; [Figure 2] A partial cross-sectional schematic diagram of the optical coating structure of a vehicle lamp according to a preferred embodiment of the present invention; [Figure 3] An exploded perspective view of a vehicle headlight according to a second preferred embodiment of the present invention; [Figure 4] A top cross-sectional view of the combination of vehicle lights according to a second preferred embodiment of the present invention; [Figure 5] A top sectional view of the combination of vehicle lights according to three preferred embodiments of the present invention; [Figure 6] A top sectional view of the combination of vehicle lights according to one of the four preferred embodiments of the present invention; [Figure 7] Measurement curve of the transmittance of the light ultimately projected by the optical coating of the vehicle lamp of the present invention across the entire wavelength band; [Figure 8] A diagram showing the color temperature measurement results of the light projected by the vehicle headlights after they have been coated with an optical coating; [Figure 9] shows the color temperature measurement results of the light projected by the vehicle headlights without optical coating. Implementation

[0019] To provide a more complete and clear disclosure of the technical content, purpose, and effects achieved by this invention, a detailed description is provided below, along with reference to the accompanying drawings and figures:

[0020] The vehicle lamp of the present invention mainly involves setting an optical coating on the light path of the light source in the vehicle lamp when it emits light. By means of the optical coating, the reflectivity of light of a predetermined wavelength in the light source is reduced or increased, thereby changing the color temperature (or wavelength) of the light finally projected by the vehicle lamp.

[0021] Please refer to Figure 1, which illustrates a preferred embodiment of the vehicle lamp of the present invention.

[0022] The vehicle headlight includes a base 1, at least one light source 2, a lampshade 3, and an optical coating 4; wherein:

[0023] The base 1 is located at the rear end of the entire headlight. The base 1 itself is a shell-like structure with a recess. The front side of the base 1 is installed correspondingly to the lamp cover 3. The installation configuration of the base 1 and the lamp cover 3 makes the recess a closed space. The light source 2 is set on the base 1, and the lamp cover 3 is just located on the light path (i.e., light path) of the light projected by the light source 2. Please refer to the second figure. The surface of the lamp cover 3 facing the light source 2 is the light-incident surface 31, and the surface away from the light source 2 is the light-exit surface 32. The lamp cover 3 is an optical element that converts the light projected by the light source 2 into light shape. The optical coating 4 is set on the light-incident surface 31 of the lamp cover 3. The optical coating 4 includes a layered structure consisting of at least four layers of silicon dioxide layer 41 and ceramic oxide layer 42 stacked alternately, with silicon dioxide layer 41 as the substrate. The film layer on the light-receiving surface 31 of the lamp cover 3 is formed by sequentially stacking silicon dioxide layer 41, ceramic oxide layer 42, silicon dioxide layer 41, and ceramic oxide layer 42 on the light-receiving surface 31 of the lamp cover 3, so that the total number of layers is at least 4. The number of stacked silicon dioxide layer 41 and ceramic oxide layer 42 and the thickness of silicon dioxide layer 41 and ceramic oxide layer 42 will change the reflectivity of the wavelength of the light source 2 passing through the optical coating 4. Therefore, in the process of forming the optical coating 4, by means of the number of stacked silicon dioxide layer 41 and ceramic oxide layer 42 and the forming thickness of silicon dioxide layer 41 and ceramic oxide layer 42, the reflectivity of light of a specific wavelength in the light source 2 after passing through the layered structure formed by the optical coating 4 can be increased or decreased, thereby changing the color temperature of the light projected by the vehicle headlight.

[0024] In this embodiment, the light source 2 can be further disposed on a substrate 21, and the substrate 21 is correspondingly disposed in the recess of the base 1 (see the first figure).

[0025] Please refer to Figures 3 and 4, which reveal a second preferred embodiment of the vehicle lamp of the present invention.

[0026] In this embodiment, the lampshade 3 is a transparent lampshade body, which is only used to enclose the recess and protect the light source 2.

[0027] The vehicle headlight structure of this embodiment includes a base 5, at least one light source 6, a lampshade 7, an optical coating 8, and a light pattern generating element 9. The base 5 is located at the rear end of the entire headlight and is a shell-like structure with a recess. The front side of the base 5 is correspondingly mounted to the lampshade 7, and the recess is enclosed by the mounting configuration of the base 5 and the lampshade 7. The light source 6 is mounted on the base 5, and the lampshade 7 is positioned exactly on the light path (i.e., light path) of the light projected by the light source 6. The light pattern generating element 9 is disposed between the light source 6 and the lampshade 7, and the lampshade 7 and the light pattern generating element 9 are located on the light path of the light source 6. The surface of the light-generating element 9 facing the light source 6 is the light-incident surface 91, and the surface of the light-generating element 9 away from the light source 6 is the light-emitting surface 92. An optical coating 8 is disposed on the light-emitting surface 92 of the light-generating element 9. The optical coating 8 includes a layered structure consisting of at least four layers formed by alternating stacking of silicon dioxide layer 81 and ceramic oxide layer 82. The silicon dioxide layer 81 is used as the film layer that contacts the light-emitting surface 92 of the light-generating element 9. That is, the light-emitting surface 92 of the light-generating element 9 is stacked in sequence with silicon dioxide layer 81, ceramic oxide layer 82, silicon dioxide layer 81, and ceramic oxide layer 82 to make the total number of layers at least 4.

[0028] According to the above structural configuration, the lamp can also change the reflectivity of the wavelength of the light source 6 passing through the optical coating 8 by the number of stacked layers of silicon dioxide layer 81 and ceramic oxide layer 82 and the thickness of silicon dioxide layer 81 and ceramic oxide layer 82. Therefore, in the process of forming the optical coating 8, by changing the number of stacked layers of silicon dioxide layer 81 and ceramic oxide layer 82 and the forming thickness of silicon dioxide layer 81 and ceramic oxide layer 82, the reflectivity of light of a specific wavelength in the light source 6 after passing through the layered structure formed by the optical coating 8 can be increased or decreased, thereby changing the color temperature of the light projected by the vehicle lamp.

[0029] In this embodiment, the light source 6 can be further disposed on a substrate 61, and the substrate 61 is correspondingly disposed in the recess of the base 5.

[0030] Please refer to Figure 5, which reveals three preferred embodiments of the vehicle lamp of the present invention.

[0031] The difference between this embodiment and its two embodiments is that the optical coating 8 is formed on the light-incident surface 91 of the light-generating element 9; similarly, after the light from the light source 6 passes through the light-generating element 9, the number of stacked layers of silicon dioxide layer 81 and ceramic oxide layer 82, as well as the forming thickness of silicon dioxide layer 81 and ceramic oxide layer 82, can change the reflectivity of light of a specific wavelength in the light source 6 after passing through the layered structure formed by the optical coating 8, thereby changing the color temperature of the light projected by the vehicle headlight.

[0032] As shown in Figure 6, it reveals a fourth preferred embodiment of the vehicle lamp of the present invention. The difference from the second and third preferred embodiments is that an optical coating 8 is formed on the light-incident surface 71 of the lamp cover 7, so that by means of the structural design of the optical coating 8, the reflectivity of light of a specific wavelength in the light source 6 is increased or decreased, thereby changing the color temperature of the light projected by the vehicle lamp.

[0033] As described above, in the headlight structure, the light source 6 is mounted on a substrate 61, and the substrate 61 is fixed on the base 5.

[0034] Please refer to Figure 7, which shows the measured transmittance curve of the light finally projected through the optical coating after the design light source with the thickness of the silicon dioxide layer and the ceramic oxide layer is coated, in the whole wavelength band. The transmittance of light in the 400-500nm wavelength band is 80%, that is, the reflectance of the optical coating in the 400-500nm wavelength band is 20%.

[0035] Please refer to Figure 8, which shows the color temperature measurement results of the light ultimately projected by the headlight when the headlight cover or light-generating element is coated with a four-layer optical coating consisting of stacked silicon dioxide and ceramic oxide layers. Figure 9 shows the color temperature measurement results of the light ultimately projected by the headlight without the optical coating. From Figures 8 and 9, it is clear that the color temperature of the light ultimately projected by the headlight with the optical coating is generally shifted to the upper right.

[0036] The examples given above are only some embodiments of the present invention and are not intended to limit the present invention. Any modifications or variations made based on the inventive spirit and features of the present invention should also be included within the scope of this patent.

[0037] In conclusion, the embodiments of the present invention can indeed achieve the expected effects, and the specific technical means disclosed therein have not been seen in similar products, nor have they been disclosed before the application. Therefore, it fully complies with the provisions and requirements of the Patent Law. Thus, we hereby file an application for an invention patent and respectfully request your review and grant of a patent, which would be of great benefit to you.

[0038] 1: Base 2: Light source 21:Substrate 3: Lampshade 31: Light-receiving surface 32: Light-emitting surface 4: Optical Coating 41: Silicon dioxide layer 42: Ceramic oxide layer 5: Base 6: Light source 61:Substrate 7: Lampshade 71: Light-receiving surface 8: Optical Coating 81: Silicon dioxide layer 82: Ceramic oxide layer 9: Light generating element 91: Light-receiving surface 92: Exposed surface

Claims

1. A vehicle lamp structure, comprising a base, at least one light source, a lampshade, and an optical coating; the base and the lampshade are correspondingly mounted, the light source is disposed on the base, and the lampshade is located in the light path of the light source; the surface of the lampshade facing the light source is the light-incident surface, and the surface away from the light source is the light-exit surface; the lampshade is an optical element with light shape conversion; the optical coating is disposed on the light-incident surface of the lampshade; the optical coating comprises a layered structure consisting of at least four layers of silicon dioxide and ceramic oxide layers stacked alternately, the silicon dioxide layers being adjacent to the light-incident surface of the lampshade; the layered structure formed by the optical coating can increase or decrease the reflectivity of light of a specific wavelength in the light source.

2. The vehicle headlight structure as described in claim 1, wherein, The light source is mounted on a substrate, and the substrate is fixed on the base.

3. A vehicle lamp structure, comprising a base, at least one light source, a lampshade, an optical coating, and a light-generating element; the base and the lampshade are correspondingly mounted, the light source is disposed on the base, the light-generating element is disposed between the light source and the lampshade, and the lampshade and the light-generating element are located in the optical path of the light source; the surface of the light-generating element facing the light source is the light-incident surface, the surface of the light-generating element away from the light source is the light-exit surface, the optical coating is disposed on the light-incident surface of the light-generating element, the optical coating comprising a layered structure consisting of at least four layers of silicon dioxide and ceramic oxide layers stacked alternately, the silicon dioxide layers being adjacent to the light-incident surface of the light-generating element; the light from the light source passing through the layered structure formed by the optical coating can increase or decrease the reflectivity of light of a specific wavelength in the light source.

4. The headlight structure as described in claim 3, wherein, The light source is mounted on a substrate, and the substrate is fixed on the base.

5. A vehicle lamp structure, comprising a base, at least one light source, a lampshade, an optical coating, and a light-generating element; the base and the lampshade are correspondingly mounted, the light source is disposed on the base, the light-generating element is disposed between the light source and the lampshade, and the lampshade and the light-generating element are located in the optical path of the light source; the surface of the light-generating element facing the light source is the light-incident surface, the surface of the light-generating element away from the light source is the light-exiting surface, the optical coating is disposed on the light-exiting surface of the light-generating element, the optical coating comprising a layered structure consisting of at least four layers of silicon dioxide and ceramic oxide layers stacked alternately, the silicon dioxide layers being adjacent to the light-exiting surface of the light-generating element; the light from the light source passing through the layered structure formed by the optical coating can increase or decrease the reflectivity of light of a specific wavelength in the light source.

6. The headlight structure as described in claim 5, wherein, The light source is mounted on a substrate, and the substrate is fixed on the base.

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