Method for operating an automotive lighting device and automotive lighting device
AssigneeValeo Vision
InventorRabih TALEB
Life of this patent
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Abstract
An automotive lighting device and a method for operating an automotive lighting device including at least one solid-state light source. The method includes defining a color allowance condition, feeding the light source with a current value which produces a luminous flux value higher than a minimum luminous flux threshold value, measuring the temperature in the light source, checking whether the output color satisfies the allowance condition and increasing or decreasing the current value, always keeping the current such as it produces a luminous flux value higher than the minimum luminous flux threshold value and producing a color which satisfies the allowance condition.
Claims13
A method for operating an automotive lighting device comprising at least one solid-state light source, the method comprising the steps of:
- 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;
- checking whether the color obtained satisfies the allowance condition;
- and
- adjusting the current value, always keeping the current such as it 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.
An automotive lighting device comprising:
- a matrix arrangement of solid-state light sources;
- a control element configured to:
- define 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;
- establish a minimum luminous flux threshold value and a maximum luminous flux threshold value;
- feed 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;
- measure the temperature in the light source;
- obtain the color of the light emitted by the light source;
- check whether the color obtained in the preceding step satisfies the allowance condition;
- and
- adjust the current value, always keeping the current such as it produces a luminous flux value comprised between the minimum luminous flux threshold value and the maximum flux threshold value and producing a color which satisfies the allowance condition.
Dependencies are inferred from the claim text.