Vehicular lamp
First Claim
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1. A vehicular lamp comprising:
- a semiconductor light source;
switching means connected to the semiconductor light source in series for adjusting a current flowing through the semiconductor light source by on/off operation; and
current control means for detecting the current flowing through the semiconductor light source and controlling the current supplied to the semiconductor light source according to a detected current value,wherein the switching means is arranged to switch between a first lighting mode, in which the semiconductor light source stays on, and a second lighting mode, in which the semiconductor light source repeatedly turns on and off, andwherein the current control means is arranged to provide control such that a peak current flowing through the semiconductor light source in the second lighting mode is smaller than that in the first lighting mode.
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Abstract
A vehicular lamp includes a semiconductor light source and a switching means arranged to switch between a first lighting mode, in which the semiconductor light source stays on, and a second lighting mode, in which the semiconductor light source repeatedly turns on and off. The lamp is arranged so that a peak current flowing through the semiconductor light source in the second lighting mode is smaller than that in the first lighting mode. The arrangement can help suppress overshooting and undershooting in the light source current.
8 Citations
3 Claims
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1. A vehicular lamp comprising:
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a semiconductor light source; switching means connected to the semiconductor light source in series for adjusting a current flowing through the semiconductor light source by on/off operation; and current control means for detecting the current flowing through the semiconductor light source and controlling the current supplied to the semiconductor light source according to a detected current value, wherein the switching means is arranged to switch between a first lighting mode, in which the semiconductor light source stays on, and a second lighting mode, in which the semiconductor light source repeatedly turns on and off, and wherein the current control means is arranged to provide control such that a peak current flowing through the semiconductor light source in the second lighting mode is smaller than that in the first lighting mode. - View Dependent Claims (2)
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3. A vehicular lamp comprising:
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a semiconductor light source; circuitry connected in series to the semiconductor light source to adjusting a current flowing through the semiconductor light source by on/off operation; and circuitry to detect the current flowing through the semiconductor light source and to control the current supplied to the semiconductor light source according to a detected current value, wherein the lamp is arranged to switch between a first lighting mode, in which the semiconductor light source stays on, and a second lighting mode, in which the semiconductor light source repeatedly turns on and off, and wherein the lamp is arranged such that a peak current flowing through the semiconductor light source in the second lighting mode is smaller than that in the first lighting mode.
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Specification