US 12,289,809 B2
Method for operating an automotive lighting device and automotive lighting device
Rabih Taleb, Bobigny (FR)
Assigned to Valeo Vision, Bobigny (FR)
Appl. No. 18/250,548
Filed by VALEO VISION, Bobigny (FR)
PCT Filed Oct. 28, 2021, PCT No. PCT/EP2021/080060
§ 371(c)(1), (2) Date Apr. 26, 2023,
PCT Pub. No. WO2022/090430, PCT Pub. Date May 5, 2022.
Claims priority of application No. 2011166 (FR), filed on Oct. 30, 2020.
Prior Publication US 2023/0403774 A1, Dec. 14, 2023
Int. Cl. H05B 45/28 (2020.01)
CPC H05B 45/28 (2020.01) 12 Claims
OG exemplary drawing
 
1. A method for operating an automotive lighting device comprising at least one solid-state light source, the method comprising:
defining a color allowance condition for the solid-state light source, wherein for each pair temperature-electrical current, a color is defined to be acceptable or not acceptable;
establishing a minimum luminous flux threshold value and a maximum luminous flux threshold value;
feeding the light source with a current value which produces a luminous flux value comprised between the minimum luminous flux threshold value and the maximum luminous flux threshold value;
measuring the temperature in the light source;
obtaining the color of the light emitted by the light source, by using a datasheet, which provides the color from the measured temperature and the current value;
checking whether the color obtained satisfies the allowance condition; and
adjusting the current value, always keeping the current such as the solid-state light source produces a luminous flux value between the minimum luminous flux threshold value and the maximum flux threshold value and producing a color which satisfies the allowance condition.