DISPLAY DEVICE
First Claim
Patent Images
1. A display device comprising:
- a light flux generating unit to generate light flux containing image information;
a reflection plate to reflect the light flux generated by the light flux generation unit toward one eye of an occupant;
a head detection unit to detect a position of a head of the occupant;
a control unit to control a position of the reflection plate based on output from the head detection unit; and
a drive unit to drive the reflection plate on the basis of output from the control unit;
whereinthe head detection unit utilizes a first distance sensor pair including a distance sensor A and a distance sensor B and a second distance sensor pair including a distance sensor C and a distance sensor D to detect the position of the head of the occupant;
the control unit calculates a coefficient G from an output voltage difference of the first distance sensor pair and an output voltage difference of the second distance sensor pair when an output voltage of the distance sensor A and an output voltage of the distance sensor D become substantially equal to each other; and
the control unit controls a direction or a position of the reflection plate on the basis of the coefficient G and either the output voltage difference of the first distance sensor pair or the output voltage difference of the second distance sensor pair.
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Abstract
A display device includes a light flux generation unit 115 to generate light flux 112 containing image information, a reflection plate 163 to reflect the light flux toward one eye 105 of an occupant 100, a head detection unit 612 to detect a head 101 of the occupant 100 by utilizing at least two pairs of distance sensors, a control unit 620 to determine the position of the head 101 of the occupant 100 as receiving output from the head detection unit 612 and to control a direction or a position of the reflection plate 163, and a drive unit 164 to drive the reflection plate 163 as receiving output from the control unit 620.
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Citations
3 Claims
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1. A display device comprising:
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a light flux generating unit to generate light flux containing image information; a reflection plate to reflect the light flux generated by the light flux generation unit toward one eye of an occupant; a head detection unit to detect a position of a head of the occupant; a control unit to control a position of the reflection plate based on output from the head detection unit; and a drive unit to drive the reflection plate on the basis of output from the control unit; wherein the head detection unit utilizes a first distance sensor pair including a distance sensor A and a distance sensor B and a second distance sensor pair including a distance sensor C and a distance sensor D to detect the position of the head of the occupant; the control unit calculates a coefficient G from an output voltage difference of the first distance sensor pair and an output voltage difference of the second distance sensor pair when an output voltage of the distance sensor A and an output voltage of the distance sensor D become substantially equal to each other; and the control unit controls a direction or a position of the reflection plate on the basis of the coefficient G and either the output voltage difference of the first distance sensor pair or the output voltage difference of the second distance sensor pair. - View Dependent Claims (2, 3)
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Specification