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Head tracking system with improved detection of head rotation

A head tracking, head technology used in radio wave measurement systems, beacon systems using electromagnetic waves, stereo systems, etc.

Active Publication Date: 2012-05-02
HARMAN BECKER AUTOMOTIVE SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Only small head rotations of roughly + / - 20° can be detected with the geometry used in this patent application

Method used

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  • Head tracking system with improved detection of head rotation
  • Head tracking system with improved detection of head rotation
  • Head tracking system with improved detection of head rotation

Examples

Experimental program
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Embodiment Construction

[0022] exist figure 1 A head tracking system is schematically shown in . The head tracking system includes one or more light sources 10 emitting light to a position sensitive device 100 mounted on the headset 20 . The light source 10 may be a light emitting diode (LED), which emits light in a predetermined frequency range, such as pulsed infrared rays. In order not to disturb the user wearing the headset 20, the infrared frequency range may be used. As referenced below Figure 2 to Figure 4 To explain in further detail, the light emitted by the LED 10 generates a light spot on the position sensitive device 100 . The position of the light spot on the position sensitive device is used to determine the position of the head of the user wearing the headset. The LED 10 may be arranged at a fixed position and may send light in the direction of the user wearing the headset. figure 1 The system shown in may be part of an entertainment system for the rear seat of a vehicle, in whic...

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Abstract

The application relates to a head tracking system determining a head position of a user, comprising a light source (10) emitting light onto a rectangular position sensitive device (100) provided in a support structure (200). The light emitted by the sight source generates a light spot on the position sensitive device, and a head position determining module (170) is provided using the position of the light spot on the position sensitive device to determine the head position wherein the support structure (200) is designed to support the position sensitive device (100) in such a way that a head rotation results in a displacement of the light spot to a corner of the rectangular position sensitive device.

Description

technical field [0001] The present application relates to a head tracking system for determining the position of a user's head, and to an audio system using the head tracking system to generate virtual surround sound for said user. Background technique [0002] Head tracking systems are known which detect different types of head movements. For example, a gyroscope is used to detect the rotation of the head about the longitudinal axis of the head (ie at head level). Angular acceleration is detected using such a gyroscope. [0003] EP 2012170A1 discloses a head tracking system in which position sensitive devices and light sources such as LEDs are used to correct for deviations occurring in gyroscopes. Only small head rotations of roughly + / - 20° can be detected with the geometry used in this patent application. Using an embodiment as described in EP 2012170A1 it is not possible to determine the position of the head using only one single position sensitive device within a ra...

Claims

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Application Information

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IPC IPC(8): G01B11/00G01B11/26H04R5/033
CPCH04R5/04G01S3/782G02B27/0093G01S5/163H04S7/304G01S3/783G01S1/70G01S3/784G06F3/012
Inventor W.赫斯T.迈耶
Owner HARMAN BECKER AUTOMOTIVE SYST
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