DE202012009581U1 - display device - Google Patents

Abstract

Display device worn on the head of a user, comprising a display unit, a bracket that is connected to the display unit and, when the display device is properly worn, laterally on the user's head to an ear of the user, and a headband that is connected to the bracket and detects the user's head movements. tracking module, characterized in that the head tracking module, when the display device is worn as intended, sits essentially behind the user's ear and holds the display device on the user's head.

Description

The invention relates to a display device having the features of the preamble of claim 1.

For head-mounted displays, so-called head mounted displays - HMDs, a variety of applications are conceivable. One of these applications is the representation of a virtual reality for a user. In one embodiment, the user is presented via the mostly helmet- or spectacle-like display device via moving images, a virtual environment in which the user can move, for example, by using an input device operated with the hands that control commands (forward, right, left, etc.) are received and converted by an image forming unit so as to generate images corresponding to these input commands; the user gets displayed images that give the impression, as if the user in the virtual world, for example, progress, turn to the right or left, etc.

To increase the degree of immersion, ie the degree of realism of the presented virtual reality, it is for example from the US 2002/0128541 A1 It is known to combine an HMD with a head tracking module detecting the user's head movements. In the execution of US 2002/0128541 A1 The HMD is designed like a helmet. The head-tracking module is attached to the back of the helmet and thus detects the head movements of the user in virtual reality. The helmet-like design of the HMD, however, is associated with loss of comfort for the user.

Based on this prior art, it is an object of the invention to provide a display device with a head-tracking module which is worn on the head of a user and has improved user ergonomics.

The object is achieved according to the invention with the characterizing features of claim 1.

The subclaims are advantageous embodiments of the main claim.

According to the invention, a display device carried on the head of a user is provided, comprising a display unit, a bracket connected to the display unit in the intended worn state of the display laterally at the head of the user to a user's ear hinführendem and connected to the bracket, the head movements of the User detected head tracking module, wherein the head tracking module sits in the intended worn state of the display device substantially behind the user's ear and holds the display device on the head of the user.

The display device according to the invention realizes on the one hand a combination of HMD and head-tracking module in eyeglass-like design, which means a significant increase in comfort when using the display device in comparison to the known from the prior art combinations.

The consideration to position the head tracking module in the worn state of the display device behind the user's ear is due to the surprising finding that even at the position behind the user's ear, which is much closer to the pivot point of the head than the From the prior art known positioning on the back of the head, head movements are reliably detected.

The positioning of the head-tracking module behind the user's ear also allows the head-tracking module, in addition to its function of detecting the head movements of the user, to also serve to hold the display device on the user's head.

Preferably, the head-tracking module is externally shaped so that it sits comfortably behind the ear of the user in the used state and in its outer dimensions preferably 90 mm × 20 mm × 50 mm, particularly preferably 70 mm × 15 mm × 40 mm ( Length × width × height).

Advantageously, the head tracking module is detachably connected to the bracket.

In this way, the module can be easily replaced for example in case of a defect.

It is preferably provided that the head tracking module is adjustably connected to the bracket along the bracket.

In this way, the seat of the module behind the ear is adapted to different users and thus further optimizes the holding function of the module.

Preferably, it is also provided that the adjustment of the head-tracking module takes place relative to the bracket along a bracket rail having a plurality of locking positions, wherein the head-tracking module on the ironing rail along feasible and thereby in each case the detent positions can be latched.

The detents prevent inadvertent adjustment of the seat adapted to the user and particularly pleasantly felt by the user during use of the display device.

In a preferred embodiment, it is provided that the head tracking module detects its own rotation data and acceleration data in three mechanical degrees of freedom.

The acquisition of a total of six mechanical degrees of freedom results in a particularly accurate position detection.

Particularly advantageous is the head tracking module with a three-axis compass, with which the horizontal absolute position of the head tracking module can be determined, equipped with a rotation rate sensor for detecting the rotational speed in three axes and with an acceleration sensor for detecting the acceleration in three axes ,

The rotation rate sensor and the acceleration sensor provide the measurement data for six mechanical degrees of freedom. By means of the compass, the module is advantageously also able to reference its position in the room itself.

Preferably, the head tracking module additionally comprises a data transmission module for the wireless transmission of the acquired data. Examples of such a data transmission module are modules which transmit data according to the Bluetooth or WLAN or mobile radio specifications, for example.

Advantageously, in this way the acquired data can be transmitted wirelessly to an external data acquisition and / or processing unit.

In a preferred embodiment, the display device is designed as video glasses. The displayed image data or information data is preferably presented to the user's eye via a display, for example an LCD or OLED, either directly or via a downstream optical system.

Alternatively, the display device is designed in a further preferred embodiment as a data goggles. The displayed image data or information data are, for example, coupled into a transparent or partially transparent glass, similar to a spectacle lens, which can also have a correction function, and can be perceived by the observer in superimposition with his surroundings. In other words, the viewer is not isolated from his environment, but on the contrary can capture the virtual data displayed through the glass as well as perceiving his surroundings through the glass.

It is understood that the features described and described below can be used not only in the specified combinations but also in other combinations or alone, without departing from the scope of the present invention.

The invention will be described below with reference to exemplary embodiments. Show it:

1 : An embodiment of a display device according to the invention, as well

2 : The exemplary representation of a head tracking module according to an example of the invention.

The invention will be described with reference to the figures in several embodiments.

1 shows a display device according to the invention 1 from the user-facing side. The display device 1 has a display unit 2 on. The display unit 2 has a viewing opening 2a (partially shown) with a dahinerliegenden optics, by means of which the left eye of the user in the case shown by an imager (not shown), for example, a LCD Dispaly or OLED display, generated image and / or information data are presented. The display unit 2 has a nose bridge (not shown) with which the display unit 2 on the nose of the user, analogous to a conventional spectacle frame, can be placed. With the user side left side of the display unit 2 is a strap 3 connected, similar to a conventional eyeglass temple in the attached state of the display device 1 to the left ear of the user leads. It can of course be provided that the display unit 2 on her user's right side with another bracket 3 is connected and another insight opening 2a for the right user's eye. The coat hanger 3 has a bow bar underneath 5 in which a holding organ 7 a head tracking module 4 intervenes. The holding organ 7 is particularly clear in 2 shown. Again 2 it can be seen, is the holding member 7 is shaped so that the head tracking module 4 on the ironing rail along the bracket 3 is displaceable. For this purpose, the holding member 7 one of the ironing rail 5 corresponding guide in the form of a guide groove. In the temple facing area is the ironing rail 5 with detents 6 provided in which the head tracking module 4 is restrained. For this purpose, the guide groove of the holding member 7 in the upper narrow area with a nose (not shown) provided in the notches 6 intervenes. The head tracking module 4 can be pulled off the back of the bar rail and is thus from the bracket 5 detachable and, for example, exchangeable.

In 2 is an inventive head tracking module 4 shown. The module 4 has a retaining member 7 on, that of attaching the module 4 at the ironing rail 5 of the temple 3 serves. The functioning of the holding member 7 has already been described in more detail above. The head tracking module 4 points under a cover 9 a cavity on. Embedded in this cavity is the electronic component 8th , This contains components necessary for the acquisition of rotation and acceleration data (hatched rectangles on the electronic component 8th ), which are preferably implemented in MEMS (microelectromechanical systems) technology. The electronic component includes at least one three-axis compass each, a three-axis or yaw rate sensor and an acceleration sensor. Preferably, gyroscope and accelerometer are integrated with motion fusion functionality. In addition, the electronic component has 8th a microcontroller for data connection and other electronic components, in particular an FPGA, for the hardware preprocessing of the measured sensor values (calculation of quaternions and Euler angles). The repetition rate of the measurements is preferably greater than 60 Hz, the reaction time is preferably better than 15 ms. The data transfer to a peripheral device takes place wirelessly via a Bluetooth interface. Alternatively, the data connection can be realized via a USB interface (not shown). The position data is transmitted preprocessed to the peripheral device. The peripheral device evaluates the transmitted position data and then sends correspondingly processed image data and / or information data to the image generator.

LIST OF REFERENCE NUMBERS

1

display device

2

display unit

2a

display

3

hanger

4

Head-tracking module

5

Ironing rail

6

latching

7

holding member

8th

electronic component

9

housing cover

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• US 2002/0128541 A1 [0003, 0003]

Claims (9)

A display device carried on the head of a user, comprising a display unit, a bracket connected to the display unit in the intended worn state of the display device at the side of the user's head to an ear of the user and a headpiece connected to the bracket which detects the head movements of the user. tracking module, characterized in that the head-tracking module sits in the intended worn condition of the display device substantially behind the user's ear and holds the display device on the head of the user. Display device according to claim 1, characterized in that the head tracking module is detachably connected to the bracket. Display device according to claim 1 or 2, characterized in that the head-tracking module is adjustably connected to the bracket along the bracket. Display device according to claim 3, characterized in that the adjustment of the head-tracking module relative to the bracket takes place along a bracket rail, which has a plurality of notches, wherein the head-tracking module along the ironing rail along feasible and thereby in each case the detents latched is. Display device according to one of the preceding claims, characterized in that the head tracking module detects its own rotation data and acceleration data in three mechanical degrees of freedom. Display device according to claim 5, characterized in that the head tracking module A three-axis compass with which the horizontal absolute position of the head-tracking module can be determined, - A rotation rate sensor for detecting the rotational speed in three axes and - Includes an acceleration sensor for detecting the acceleration in three axes. Display device according to one of the preceding claims, characterized in that the head-tracking module additionally comprises a data transmission module for the wireless transmission of the acquired data Display device according to one of the preceding claims, characterized in that the display device is designed as a video glasses. Display device according to one of claims 1 to 7, characterized in that the display device is designed as a data goggles.

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