Dual color temperature vehicle lamp able to judge driving environment based on invisible light and judging method

• US 10,214,137 B2
• Filed: 05/19/2017
• Issued: 02/26/2019
• Est. Priority Date: 03/27/2017
• Status: Active Grant

• Current Assignee: Leiman Lighting (DongGuan) Tech. Limited
• Original Assignee: Leiman Lighting (DongGuan) Tech. Limited
• Inventors: Tong, Jianhua, Lin, Yucheng
• Primary Examiner(s): Owens, Douglas W
• Assistant Examiner(s): Chen, Jianzi
• Application Number:
  US15/600,568
• Publication Number:
  US 20180272923A1
• Time in Patent Office: 648 Days
• Field of Search: None
• CPC Class Codes: B60Q 1/1423 Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
• CPC Class Codes: B60Q 2300/312 Adverse weather
• CPC Class Codes: B60Q 2900/30 Lamps commanded by wireless transmissions
• CPC Class Codes: F21S 41/125 Coloured light
• CPC Class Codes: G01J 1/08 Arrangements of light sources specially adapted for photometry standard sources, also using luminescent or radioactive material
• CPC Class Codes: G01J 1/18 using comparison with a reference electric value
• CPC Class Codes: G01J 1/32 adapted for automatic variation of the measured or reference value regulation of light intensity G05D25/00
• CPC Class Codes: G01J 1/429 applied to measurement of ultraviolet light using counting tubes G01T
• CPC Class Codes: G01J 1/44 Electric circuits for command of an exposure part G03B7/02
• CPC Class Codes: G01J 2001/4242 Modulated light, e.g. for synchronizing source and detector circuit
• CPC Class Codes: G01J 2001/4473 Phototransistor

Abstract

A dual color temperature vehicle lamp able to judge a driving environment based on invisible light includes a vehicle lamp body in the form of an LED. The vehicle lamp body includes a light emitting unit capable of performing a conversion of at least two kinds of color temperature light. A front end face of the vehicle lamp body is provided with at least one invisible light emitting source, at least one reflected light receiver, and a partition plate between the invisible light emitting source and the reflected light receiver. The invisible light emitting source is embedded in a recess at a front end of the vehicle lamp body. The vehicle lamp body includes a preamplifier circuit connected with the reflected light receiver, an MCU connected with the preamplifier circuit, and a wireless transceiver module connected with the MCU therein.

Claims

1. A method for regulating a color temperature of a vehicle lamp based on invisible light, comprising the following steps of:

step 1;

in a working state when the vehicle lamp is turned on, an invisible light emitting source to emitting light having a wavelength of less than 400 nm or greater than 760 nm, the invisible light carrying a 38 KHZ signal;

step 2;

in the working state when the vehicle lamp is turned on, a reflected light receiver receiving ambient light and converting a received signal of the ambient light into an electrical signal to amplify the signal, with 5V as a maximum value, the amplified signal being proceeded to identify a target light signal carrying the 38 KHZ signal and calculate a voltage intensity value of the received target light signal;

step 3;

a processing chip making a comparison for the voltage intensity value obtained in the step 2, wherein when the voltage intensity value is less than 1V, the value of the electrical signal is ignored;

when the voltage intensity value is 1-2V, it is judged that the weather is rainy or foggy and the vehicle lamp is controlled to regulate its color temperature;

when the voltage intensity value is greater than 2V, the value of the electrical signal is ignored; and

step 4;

the processing chip getting a control judgment through the step 3 and converting the control judgment into a control signal to the vehicle lamp and controlling a working color temperature of the vehicle lamp.

2. The method as claimed in claim 1, wherein the processing chip in the step 4 is communicated with each vehicle lamp body by means of a radio frequency signal or a wired connection.

3. The method as claimed in claim 1, wherein the invisible light in the step 2 is ultraviolet light.