Patent Application
20170241610
1. Field of the Invention
The present invention relates to a car LED light, and more particularly to a car LED light capable of changing color temperature.
2. Description of the Prior Art
Different color temperatures of the light have different illumination characteristics. For example, white light provides a bright visual effect and is suitable for a general weather. Yellowish light has a better penetration to provide a better illumination effect for a rainy or foggy day. The inventor has invented car lights which are able to change color temperature in accordance with different environments, as disclosed in U.S. Pat. No. 8,777,454 and early publication No. US20140301084. The car light comprises a lamp holder. The front of the lamp holder is provided with a reflection trough and formed with an opening. The lamp holder comprises a light source in the reflection trough. The lamp holder is further provided with a color temperature change unit. The color temperature change unit has a light filter. The light emitted from the light source can be selectively filtered fully or not for changing the color temperature of the car light.
The car light disclosed in the aforesaid patents uses a light bulb as the light source. The light from the light source radiates 360 degrees. For the light to be filtered fully or not in order to meet the strict standards of SAE and DOT certification, namely, no color mixing or overflowing light, the color temperature change unit must be disposed at the opening. On condition that the light filter is controlled to block the opening fully, the direct light emitted from the light source can be fully blocked and is reflected by the reflection trough to achieve the object that the light is fully filtered. Alternatively, the light filter is controlled to be away from the opening, enabling the light to pass through the opening directly so as to achieve the object that the light is not filtered.
With the development of technology, the existing car lights are provided with LEDs as a light source. By using the LEDs, the size of the car light is reduced greatly. The aforesaid patents of the inventor also use LEDs as the light source of the car light. However, because the color temperature change unit must be lifted or turned, the entire car light is larger in size, unable to meet the demand of a compact car light. Accordingly, the inventor of the present invention has devoted himself based on his many years of practical experiences to solve these problems.
The primary object of the present invention is to provide a car LED light capable of changing color temperature.
In order to achieve the aforesaid object, the car LED light capable of changing color temperature of the present invention comprises a lamp holder. A front side of the lamp holder is provided with a concave trough and formed with an opening. The lamp holder is provided with an LED module in the concave trough. The LED module has a beam angle θ. The lamp holder is further provided with a color temperature change unit. The color temperature change unit is and located close to the LED module. The color temperature change unit comprises a drive member. The drive member is connected with at least one light filter and able to drive the light filter to move relative to the LED module. The light filter is located in front of the beam angle θ. The area of the light filter is greater than the beam angle θ.
The car LED light capable of changing color temperature of the present invention uses the LED module which provides direct light and has a limitation of the beam angle θ. The color temperature change unit is directly disposed in front of the LED module and the area of the light filter is greater than the beam angle θ. Through the drive member, the light filter is selectively driven to be in front of the beam angle θ, enabling the light emitted from the LED module to be first filtered by the light filter to radiate toward a front of the lamp holder; or the light filter is selectively driven to be away from the range of the beam angle θ, enabling the light emitted from the LED module to radiate toward the front of the lamp holder directly, not filtered by the light filter. Thereby, the light can be fully filtered or not through the light filter to achieve the object of changing color temperature. Compared to the prior invention of the inventor, the present invention can simplify the structure greatly to reduce the size of the car light and lower the cost.
Embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings.
The lamp holder 10 has a front side 11 and an opposing rear side 12. The front side 11 is provided with a concave trough 13 and formed with an opening 131.
The LED module 20 is disposed in the concave trough 13. Wherein, the LED module 20 is direct light having a beam angle θ, namely, the light emitted from the LED module 20 is within the range of the beam angle θ. There is no light out of the range of the beam angle θ. The beam angle of the LED light on the market is about 80 to 135 degrees.
The color temperature change unit 30 is disposed on the lamp holder 10 and located close to the LED module 20. The color temperature change unit 30 comprises a drive member 31. The drive member 31 is connected with at least one light filter 32 and can drive the light filter 32 to move relative to the LED module 20, such that the light filter 32 is selectively located in front of the beam angle θ or away from the range of the beam angle θ. In this embodiment, the drive member 31 is a solenoid valve having a telescopic rod 311. The telescopic rod 311 is connected with the light filter 32. Wherein, the light filter 32 is located in front of the beam angle θ, and the distance D between the light filter 32 and the LED module 20 is less than 2 cm. The area of the light filter 32 is greater than the beam angle θ.
The light blocking unit 40 is disposed at the opening 131 of the lamp holder 10 and located in front of the color temperature change unit 30. In this embodiment, the light blocking unit 40 can be a light blocking plate 41. The light blocking plate 41 is configured to shelter the lower portion of the opening 131. The upper portion of the opening 131 is not sheltered by the light blocking plate 41 to form a light outlet A.
The lens 50 is disposed in front of the light blocking unit 40 to cover the entire opening 131.
Referring to
Accordingly, the present invention uses the LED module 20 which provides direct light and has a limitation of the beam angle θ. The color temperature change unit 30 is directly disposed in front of the LED module 20 and the area of the light filter 32 is greater than the beam angle θ, such that the drive member 31 drives the light filter 32 to be selectively located in front of the beam angle θ or away from the range of the beam angle θ for the light to be fully filtered or not in order to achieve the object of changing color temperature. Compared to the prior invention of the inventor, the present invention can simplify the structure greatly to reduce the size of the car light and lower the cost.
It is noted that the area of the beam angle θ will increase with the distance. Preferably, the distance D between the light filter 31 and the LED module 20 is less than 2 cm, such that the light filter 32 won't be too big. If the light filter 32 is too big, it will cause a burden to the drive member 31 and the lamp holder 10 must be enlarged to provide enough space for movement of the light filter 32.
Although particular embodiments of the present invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the present invention. Accordingly, the present invention is not to be limited except as by the appended claims.
