TWI907277B - Vehicle lamp structure - Google Patents

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

Headlight structure

This invention relates to a vehicle headlight structure, and more particularly to a structure that can reflect light of a certain wavelength from the original light source of the vehicle headlight using an optical coating, or increase or decrease the reflectivity of light of a certain wavelength, so as to change the color temperature of the light ultimately projected by the vehicle headlight.

Vehicle lights are crucial components 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.

In terms of 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 range of visible light, 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 driving conditions and increase the risk of driving.

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 emission wavelength, 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, making it unable to meet the relevant regulations.

In light of this, the inventors have developed a device that can increase the reflectivity of light in the original light source that does not meet the regulatory requirements, or reduce the reflectivity of light in the original light source that does meet the regulatory requirements, through an 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.

In view of the above-mentioned common knowledge, the purpose of this invention is to provide a vehicle headlight structure that, through optical coating, can increase the reflectivity of light in the original light source used by the vehicle headlight that does not meet the requirements of the regulations in the wavelength band, or reduce the reflectivity of light in the original light source that does meet the requirements of the regulations in the wavelength band, so that the wavelength or color temperature of the light ultimately projected by the original light source meets the requirements.

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

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 positioned 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 pattern conversion capabilities. The optical coating is disposed on the light-incident surface of the lampshade, and the optical coating comprises silicon dioxide (SiO2 ₎ sequentially... The silicon dioxide layer and the ceramic oxide layer are stacked alternately to form a layered structure of at least four layers, and the silicon dioxide layer is 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.

As described above, in the headlight structure, the light source is disposed on a substrate, and the substrate is fixed on the base.

The aforementioned objective of this invention can also be achieved by the following techniques:

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 a light-incident surface. The surface away from the light source is the light-emitting 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. The silicon dioxide layers are 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.

As described above, in the headlight structure, the light source is disposed on a substrate, and the substrate is fixed on the base.

The aforementioned objective of this invention can also be achieved by the following techniques:

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 a light-incident surface. The surface away from the light source is the light-emitting surface. The optical coating is disposed on the light-emitting 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. The silicon dioxide layers are adjacent to the light-emitting 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.

As described above, in the headlight structure, the light source is disposed on a substrate, and the substrate is fixed on the base.

The advantages of this invention are:

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 lampshade of the vehicle lamp. By allowing the light source to pass through the optical coating, the reflectivity of light of a specific wavelength in the light source can be increased or decreased, thereby changing the color temperature (or wavelength) of the light ultimately projected by the vehicle lamp to comply with vehicle lamp regulations. This achieves the goal of ensuring that the color temperature (or wavelength) of the light source selected by the vehicle lamp meets the vehicle lamp regulations even if the light source does not meet the regulations.

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

The main feature of this invention is that an optical coating is placed in the light path of the light source in the vehicle headlight during light emission. The optical coating reduces or increases the reflectivity of a preset portion of the wavelength of light in the light source, thereby changing the color temperature (or wavelength) of the light ultimately projected by the vehicle headlight.

Please refer to Figure 1, which illustrates a preferred embodiment of the vehicle light of the present invention.

The vehicle headlight includes a base 1, at least one light source 2, a lamp cover 3, and an optical coating 4; wherein:

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 forms a closed space in the recess. The light source 2 is mounted on the base 1, and the lamp cover 3 is positioned exactly on the light path (i.e., light path) of the light projected by the light source 2. Please also refer to the second figure, where the lamp cover 3 faces the light source 2. The side surface is the light-incident surface 31, and the side surface away from the light source 2 is the light-emitting surface 32. The lampshade 3 is an optical element that converts the light emitted from the light source 2 into light shape. The optical coating 4 is disposed on the light-incident surface 31 of the lampshade 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 the silicon dioxide layer 41 serving as the substrate. The film layer on the light-receiving surface 31 of the lampshade 3 is formed by sequentially and repeatedly stacking silicon dioxide layer 41, ceramic oxide layer 42, silicon dioxide layer 41, and ceramic oxide layer 42 on the light-receiving surface 31, so that the total number of layers is at least 4. The number of stacked silicon dioxide layer 41 and ceramic oxide layer 42, as well as the thickness of silicon dioxide layer 41 and ceramic oxide layer 42, will change the light source 2's transmission through the optical coating 4. The reflectivity of wavelengths can be adjusted during the formation of the optical coating 4 by changing the number of stacked silicon dioxide layers 41 and ceramic oxide layers 42, as well as the forming thickness of silicon dioxide layers 41 and ceramic oxide layers 42. This changes 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, thereby altering the color temperature of the light emitted by the headlights.

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 first figure).

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

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.

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. The base 5 itself is a shell-like structure with a recess. The front side of the base 5 is correspondingly mounted to the lampshade 7, and the mounting configuration of the base 5 and the lampshade 7 forms a closed space within the recess. The light source 6 is disposed on the base 5, and the lampshade 7 is positioned exactly on the light path (i.e., light path) of the projected light from 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 repeatedly stacked in sequence in the manner of silicon dioxide layer 81, ceramic oxide layer 82, silicon dioxide layer 81, and ceramic oxide layer 82 so that the total number of layers is at least 4.

With the above-described structure, 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 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, the reflectivity of light of a specific wavelength in the light source 6 can be increased or decreased after the light from the light source 6 passes through the layered structure formed by the optical coating 8 by the number of 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, thereby changing the color temperature of the light emitted by the car headlight.

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.

Please refer to Figure 5, which reveals three preferred embodiments of the vehicle lights of the present invention.

The difference between this embodiment and the second embodiment 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 layered structure formed by the optical coating 8, thereby increasing or decreasing the reflectivity of light of a specific wavelength in the light source 6, and thus changing the color temperature of the light emitted by the headlights.

As shown in Figure 6, it reveals a fourth preferred embodiment of the vehicle headlight 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 emitted by the vehicle headlight.

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

Please refer to Figure 7, which shows the measured transmittance curve of the light finally projected through the optical coating after passing through the designed light source with silicon dioxide and ceramic oxide coating thicknesses. The transmittance of light in the 400-500nm wavelength range is 80%, which means that the reflectance of the optical coating in the 400-500nm wavelength range is 20%.

Please refer to Figure 8, which shows the color temperature measurement results of the light ultimately projected by the headlight when a four-layer optical coating consisting of silicon dioxide and ceramic oxide layers is deposited on the headlight cover or light-generating element. 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.

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

In conclusion, this invention embodiment can indeed achieve the intended use effect, and the specific technical means disclosed therein have not only never been seen in similar products, but have also not been disclosed before the application. It fully complies with the provisions and requirements of the Patent Law. Therefore, I hereby file an application for an invention patent and earnestly request your kind consideration and permission to grant the patent. I would be truly grateful for your assistance.

1: Base; 2: Light source; 21: Substrate; 3: Lampshade; 31: Light-incident 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-incident surface; 8: Optical coating; 81: Silicon dioxide layer; 82: Ceramic oxide layer; 9: Light-generating element; 91: Light-incident surface; 92: Light-emitting surface.

[Figure 1] Exploded perspective view of a vehicle headlight according to a preferred embodiment of the present invention; [Figure 2] Partial cross-sectional schematic diagram of the optical coating structure of a vehicle headlight according to a preferred embodiment of the present invention; [Figure 3] Exploded perspective view of a vehicle headlight according to a second preferred embodiment of the present invention; [Figure 4] Top cross-sectional schematic diagram of a combination of vehicle headlights according to a second preferred embodiment of the present invention; [Figure 5] Top cross-sectional schematic diagram of a combination of vehicle headlights according to a third preferred embodiment of the present invention; [Figure 6] Top cross-sectional schematic diagram of a combination of vehicle headlights according to a fourth preferred embodiment of the present invention; [Figure 7] Measurement curve of the transmittance of light ultimately projected by the optical coating of the vehicle headlight of the present invention across the entire wavelength band; [Figure 8] shows the color temperature measurement results of the light projected by the headlights under an optical coating; [Figure 9] shows the color temperature measurement results of the light projected by the headlights without an optical coating.

3: Lampshade

31: The surface receiving light

32: Exposed surface

4: Optical Coating

41: Silicon dioxide layer

42: Ceramic oxide layer

9: Light-generating element

91: Glowing surface

92: Exposed surface

8: Optical Coating

81: Silicon dioxide layer

82: Ceramic oxide layer

Claims (6)

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 positioned 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 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. The vehicle headlight structure as described in claim 1, wherein the light source is disposed on a substrate, and the substrate is fixed on the base. 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 a light-incident surface. The surface away from the light source is the light-emitting 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. The silicon dioxide layers are 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. The vehicle headlight structure as described in claim 3, wherein the light source is disposed on a substrate, and the substrate is fixed on the base. 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 a light-incident surface. The surface away from the light source is the light-emitting surface. The optical coating is disposed on the light-emitting 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. The silicon dioxide layers are adjacent to the light-emitting 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. The headlight structure as described in claim 5, wherein the light source is disposed on a substrate, and the substrate is fixed on the base.