Smart mirror apparatus using LCD panel
First Claim
1. A smart mirror apparatus to prevent light transmitted from behind a vehicle from dazzling a driver of the vehicle, comprising:
- a reflective mirror provided in the vehicle;
an LCD panel placed in a light path between the reflective mirror and eyes of the driver, and comprising one or two polarizing sheets, each having a polarization rate ranging from 50% to 95% in a visible light band, the LCD panel varying a light transmissivity thereof depending on a magnitude of voltage applied to the LCD panel, thus adjusting a quantity of light that reaches the driver after being reflected by the reflective mirror;
an incident light detecting unit detecting both brightness of the incident light transmitted from behind the vehicle to the LCD panel and brightness around the LCD panel, and calculating a difference value therebetween;
a voltage determination unit receiving the difference value calculated by the incident light detecting unit and determining the drive voltage depending on the difference value; and
a voltage apply and supply unit to apply the drive voltage determined by the voltage determination unit to the LCD panel.
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Accused Products
Abstract
The present invention provides a smart mirror apparatus using an LCD panel. The smart mirror of the present invention includes a reflective mirror, which is provided in the vehicle, and an LCD panel, which is placed in a light path between the reflective mirror and eyes of the driver and has one or two polarizing sheets. The smart mirror further includes an incident light detecting unit, which detects both the brightness of the incident light transmitted from the rear to the LCD panel and the brightness around the LCD panel, and calculates a difference value therebetween. The smart mirror further includes a voltage determination unit, which receives the calculated difference value and determines the drive voltage depending on the difference value, and a voltage apply and supply unit which applies the drive voltage, determined by the voltage determination unit, to the LCD panel.
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Citations
14 Claims
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1. A smart mirror apparatus to prevent light transmitted from behind a vehicle from dazzling a driver of the vehicle, comprising:
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a reflective mirror provided in the vehicle;
an LCD panel placed in a light path between the reflective mirror and eyes of the driver, and comprising one or two polarizing sheets, each having a polarization rate ranging from 50% to 95% in a visible light band, the LCD panel varying a light transmissivity thereof depending on a magnitude of voltage applied to the LCD panel, thus adjusting a quantity of light that reaches the driver after being reflected by the reflective mirror;
an incident light detecting unit detecting both brightness of the incident light transmitted from behind the vehicle to the LCD panel and brightness around the LCD panel, and calculating a difference value therebetween;
a voltage determination unit receiving the difference value calculated by the incident light detecting unit and determining the drive voltage depending on the difference value; and
a voltage apply and supply unit to apply the drive voltage determined by the voltage determination unit to the LCD panel. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification