Method for actuating a dimmable mirror
First Claim
1. A control device of an electrically dimmable motor vehicle mirror for setting a predefined degree of dimming of the mirror, wherein the control device at least one of charges and discharges the mirror to a setpoint voltage which is assigned to a predefined degree of dimming, and for setting the degree of dimming, a charge voltage is applied to the mirror which exceeds in absolute terms the setpoint voltage which is necessary for the predefined degree of dimming, and wherein the control device sets a predefined degree of dimming of the mirror by one of charging and discharging the mirror to the setpoint voltage, wherein the control device monitors a charge state of the mirror by electrically disconnecting the mirror from the charge voltage, and measures with high impedance an actual voltage which is present at the mirror.
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Abstract
A method for actuating an electrically dimmable mirror in which a predefined degree of dimming of the mirror is set by charging or discharging the mirror to a predefined setpoint voltage. The method provides for actuating an electrically dimmable mirror in which particularly fast switching over the degree of dimming of the mirror is achieved. In the method, in order to switch over the degree of dimming, a charge voltage is applied to the mirror which exceeds in absolute terms the setpoint voltage which is necessary for the desired degree of dimming, and the setpoint voltage is applied to the mirror after the desired degree of dimming has been attained.
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Citations
17 Claims
- 1. A control device of an electrically dimmable motor vehicle mirror for setting a predefined degree of dimming of the mirror, wherein the control device at least one of charges and discharges the mirror to a setpoint voltage which is assigned to a predefined degree of dimming, and for setting the degree of dimming, a charge voltage is applied to the mirror which exceeds in absolute terms the setpoint voltage which is necessary for the predefined degree of dimming, and wherein the control device sets a predefined degree of dimming of the mirror by one of charging and discharging the mirror to the setpoint voltage, wherein the control device monitors a charge state of the mirror by electrically disconnecting the mirror from the charge voltage, and measures with high impedance an actual voltage which is present at the mirror.
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7. A method for actuating an electrically dimmable motor vehicle mirror comprising:
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setting a predefined degree of dimming of the mirror by one of charging and discharging the mirror to a predefined setpoint voltage, wherein for the purpose of increasing the degree of dimming, a charge voltage which exceeds in absolute terms the setpoint voltage necessary for the predefined degree of dimming is applied to the mirror, and wherein the setpoint voltage is applied to the mirror after the predefined degree of dimming has been attained, wherein in order to discharge the mirror, the polarity of the charge voltage is reversed, and wherein a voltage which corresponds in absolute terms to the difference in voltage between a maximum permitted voltage of the mirror and a respective actual voltage of the mirror is applied to the mirror. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A method for actuating an electrically dimmable motor vehicle mirror comprising:
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setting a predefined degree of dimming of the mirror by the mirror being one of charged and discharged to a predefined setpoint voltage, wherein, for the purpose of increasing the degree of dimming, a charge voltage which exceeds in absolute terms the setpoint voltage necessary for the predefined degree of dimming is applied to the mirror, and wherein the setpoint voltage is applied to the mirror after the predefined degree of dimming has been attained, wherein the predefined degree of dimming of the mirror is set by the mirror being one of charged and discharged to a predefined setpoint voltage, wherein a charge state of the mirror being monitored at least during one of the charging and discharging of the mirror by being electrically disconnected from the charge voltage and an actual voltage which is present at the mirror is measured with high impedance. - View Dependent Claims (15, 16, 17)
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Specification