WO2008141957A1

WO2008141957A1 - Display device

Info

Publication number: WO2008141957A1
Application number: PCT/EP2008/055771
Authority: WO
Inventors: Ottmar Rothaupt; Stefan Hubel; Thomas Ohgke
Original assignee: Carl Zeiss Ag
Priority date: 2007-05-23
Filing date: 2008-05-09
Publication date: 2008-11-27
Also published as: DE102007024269B4; DE102007024269A1

Abstract

The invention relates to a display device, comprising a carrying device that can be placed on the head of a user and an image rendering device for depicting an image in the direction of an eye of the user, wherein the image rendering device is mounted on a guide rail provided on a headband of the carrying device by means of a guide device.

Description

display device

The invention relates to a display device which has a support device which can be placed on the head of a user and an image reproduction device for displaying an image in the direction of an eye of the user.

Such a display device, also called a head-mounted display, can be used to display an object magnified by means of the image display device. With appropriate design of the image display device, it is possible to cover the entire field of view of the user, so that the user can perceive a different environment through the image shown. In medical technology, such display devices can be used for the practice of risky operations. Furthermore, they are suitable for presenting the surgeon with an image in a safe or, with regard to ergonomics, pleasant distance from the surgical field. In addition, in such a display device of the image display device information can be displayed, which are of importance for the course of surgery or in a later documentation of the steps performed are of interest. Another field of application is maintenance tasks or on-site repairs. A service technician uses such a display device to get information into the image display device during work from a control center. Such a display device also allows video conferencing to be performed, with the image display device replacing a television screen.

The previously known display devices have a carrying device, which can be placed on the head of a user. Attached to this carrying device is an arm which extends laterally along the user's head in the direction of the eye. In the field of the user's field of vision is on this arm

Image display device attached. A disadvantage of such a construction is that this lateral arm is already starting to vibrate with only slight head movements of the user. The attached at the end of the arm image display device is moved while, so that the user can not recognize a fixed image. The side carrier also causes other objects easily get caught in it. Another disadvantage is that when a shift of the image display device from a position z. B. from the right eye to the left eye towards a costly disassembly of the display device is required. The display device must be removed from the head, the carrier arm in this example disassembled on the right side and reassembled on the opposite left side of the carrying device. Subsequently, the image display device must be readjusted in front of the left eye so that the user can see the image as well as with the right eye. In practice, this means that such a shift from one eye to another eye is not performed due to such effort.

It is an object of the invention to develop a display device of the type mentioned in such a way that a user can recognize a stable image even with rapid head movements, the side of the head of the user nothing protrudes so that something can get caught and a shift of the image display device of a to the other eye without disassembly of the display device is possible, this should preferably succeed with only one hand movement.

The object is achieved with a display device according to the features of independent claim 1. Advantageous embodiments are given in the subclaims.

The display device according to the invention has a carrying device which can be placed on the head of a user and an image reproduction device for displaying an image in the direction of an eye of the user. The image reproduction device is mounted on a provided on a headband of the support means guide rail by means of a guide device. By mounting the image display device on a guide rail, which is provided on a headband of the carrying device, a very stable position of the image display device can be achieved. A lever arm of a free-swinging

Carrier, which extends laterally at the head of the user in the direction of the eye, is no longer necessary. The image display device is thus no longer mounted laterally on the head by means of a carrier, but in the region of the user's forehead. This completely avoids a free-swinging arm. By mounting the Image reproduction device on a guide rail, the headband can also be wide, well padded and generally ergonomic design. It is possible to make the guide rail such that a precise guidance and positioning of the image display device is achieved.

Preferably, the guide rail has a length such that a displacement of the image display device from one eye to another eye of the user is possible. Thus, the image display device with only one hand of z. B. the left eye of the user to the right eye of the user are displaced by lateral displacement along the horizontally extending guide rail. The

Carrying device or the entire display device remains completely placed on the head of the user and does not have to be removed or even dismantled.

The guide device preferably has a sliding shoe and a clamping shoe attached thereto. With the shoe, the displacement of z. B. perform the left eye to the right eye with little effort. The clamping shoe allows a locking of the image display device on this shoe. According to one embodiment, the clamping shoe is mounted on the sliding block by means of a ball joint. The ball joint allows for rotational movement, so that the clamping shoe and the image display device mounted thereon can be moved out of the field of vision of the user by simply pivoting. If the clamping shoe additionally has a linear guide surface, height adjustment of the image reproduction device is easily possible.

A displacement of the clamping shoe can be achieved after moving away from at least one pressing on the ball jaw. At rest, the jaw presses at least on a part of the ball of the ball joint. By loosening this jaw a displacement, that is height adjustment, can be achieved.

According to a further embodiment of the invention, the clamping shoe on an additional ball joint, on which the image display device is mounted. Thus, two ball joints can be provided between the guide rail and the image reproduction device, so that fine adjustment of the image reproduction device with respect to the user's eye is possible. Another possibility is that the image display device with the guide rail by means of a flexible metal tube such. Thus, a finely adjustable positioning of the image display device with respect to the eye of the user can also be achieved.

The ball head of the additional ball joint may preferably be in contact with an elastomer. Such an embodiment is advantageous for achieving vibration damping of the image display device.

The guide rail preferably has plastic, z. B. POM, and has good sliding properties. If the guide rail has at least one bead and a guide channel extending equidistantly to the outer edge, a high degree of guidance accuracy can be achieved with low friction. In the unassembled state, the guide rail is preferably arcuate, wherein the guide rail is so flexible that it can adapt in the assembled state of the shape of the headband. Does the guide rail locking cams, the shoe z. B. can be easily locked by means of a pressure piece on the guide rail.

According to a further embodiment of the invention, the carrying device on the headband on a holding device for an image pickup device. The

Image recording device can be z. B. be mounted laterally to the head or above the head.

The holding device preferably has a tongue and groove connection. This can be designed so that solved with only one hand, the holding device of the support device and z. B. on the opposite side of the head can be used again in a corresponding receptacle. A disassembly of the support means for a displacement of the image pickup device of z. B. the left side on the right side of the head is not required, whereby a simple operation for the user depending on the application is possible. Preferably, the holding device on a dome for a ball joint. When moving the image pickup device of z. B. a left side to a right side of the head then shows this in an opposite direction. By the dome for a ball joint is likewise only with a hand movement a pivoting of the image pickup device by 180 ° possible, so that the image pickup device again points in the desired direction.

Preferably, the carrying device additionally has an audio device. Thus the user can also perceive audio signals or generate them himself. According to a further embodiment of the invention, the carrying device has a cable guide, so that cables from the image display device and / or the

Image receiving device and / or an audio device with strain relief can be predetermined out and kept.

Advantages and developments of the inventions will be explained with reference to the following figures, in which:

Figure 1 is a perspective view of a first embodiment of the display device according to the invention;

Figure 2 shows a side cross section of the guide device with guide rail and

Headband of the display device;

3 shows a cross section in the plan view of the guide device of

Display device; and

Figure 4 is a perspective view of the holding device for a

Image recording device of the display device.

As can be seen from FIG. 1, the display device 1 according to the invention has a carrying device 2 with a headband 3, a guide rail 4 being mounted on the headband. On the guide rail 4, a guide device 8 is mounted, which has a sliding block 5 and a clamping shoe 6. On the clamping shoe 6, an image display device 7 is attached. These

Image reproduction device 7 is oriented so that a user can see with his eye an image displayed by this image reproduction device 7. In the embodiment shown in FIG. 1, the carrying device 2 has a holding device 91 on which an image recording device 9 is mounted, see also FIG Image pickup device 9 is oriented in such a way that the point to be observed can be detected by the image recording device 9.

On a perpendicular to the headband 3 over the head of the user extending hoop 12 a clamping module 10 is arranged for an audio device. Cables coming from the

Image reproducing apparatus 7, the image pickup device 9 and an audio device continue to be held by a cable holder 11 with strain relief. The width adjustment of the carrying device 2 according to the head shape of the user by means of the adjusting mechanism thirteenth

FIG. 2 shows a lateral cross section of the guide device 8. The guide device 8 has a sliding block 5 and a clamping shoe 6. The sliding shoe 5 is mounted on a guide rail 4, which is attached to the headband 3 of the carrying device 2. The sliding shoe 5 is in contact with the guide rail 4 in such a way that it can be laterally displaced along sliding beads 41 of the guide rail 4. So that the sliding block 5 can not be unintentionally released from the guide rail 4, the sliding block 5 has at least one guide pin 53, see FIG. 3, which engages in a guide channel 42. A lock of the shoe 5 with the guide rail 4 may, for. B. by means of a pressure piece (not shown), the ball engage in locking cam 43 of the guide rail 4. The guide rail 4 is preferably made of a plastic with good sliding properties, eg. B. POM or PTFE.

From the shoe 5 is by means of a pin 52 a from a ball 52, which forms part of a ball joint 51. On the ball 52 press sideways a first jaw 61 and a second jaw 62, see Figure 3, wherein a portion 61a of the first jaw 61 and a portion 62a of the second jaw 62 are made undersized to a high pressing force on the ball 52 to achieve. On the ball 52 also acts a counterpart 66, which is provided with at least one spring retainer 65, in which a compression spring (not shown) can be accommodated. The counterpart 66 contacts the ball 52 along the contact surface 67. The contact surfaces 61b of the first clamping jaw 61 and the contact surface 62b of the second clamping jaw 62 are manufactured to nominal size. The first jaw 61 has a lower pin 64 which projects perpendicularly from the jaw 61 and presses at its free end on an inner side of a clamping shoe housing cover 70. The second jaw 62 likewise has an upper pin 63 which is opposite to the lower pin 64 and presses on the opposite inner side of the clamping shoe housing cover 70. If a pressure force directed towards the ball 52 is exerted on the lower pin 64 on the gripping region 71b of the clamping shoe housing cover 70 and on the gripping region 71a of the clamping shoe housing cover 70 a pressure force directed towards the ball 52 is exerted on the upper pin 63, the two clamping jaws 61 and 62 are forced apart so that the pressing force exerted on the ball 52 by the contact surfaces 61a and 62a decreases. With sufficient pressure force on the grip portions 71a and 71b, the contact surfaces 61a and 62a are removed by spreading the jaws far enough from the ball 52 that the clamping shoe 6 can be moved about the ball joint 51. This can be z. B. be a pivoting movement, so that a mounted on the clamping shoe image display device 7 is no longer in the field of view of the user. Since, in the embodiment shown in FIGS. 2 and 3, the guide surfaces 61a and 61b or 62a and 62b are linear guide surfaces, by exerting a compressive force on the grip regions 71a, 71b of the clamping shoe 6, a linear movement along the guide surfaces 61a, 61b or 61b is also achieved 62a and 62b, so that a height adjustment of the image display device 7 is achieved. The upper pin 63 and the lower pin 64 also serve as a stop for such linear movement.

In the lower region of the clamping shoe 6 is located in the embodiment shown in Figure 2, a second ball joint 68, to which the image display device 7 is mounted. This second ball joint 68 is advantageous, since thus a fine adjustment of the image display device 7 is made possible. For vibration damping of the image display device 7, an elastomer, preferably an O-ring 69, provided in the clamping shoe 6 so that this elastomer is in touching contact with the second ball joint 68.

FIG. 4 shows an embodiment of a holding device 91 for an image recording device 9. The holding device 91 has a tongue and groove connection 92 and a dome 93. The tongue and groove connection 92 is dimensioned such that the sliding carriage 94 is simply released from a guide element 95 can be. The holding device 91 is arranged on the side of the carrying device 2 in the embodiment shown in FIG. 4, see also FIG. If the image pickup device 8 is to be mounted on the opposite side, the sliding carriage 94 can be set and inserted on an opposite guide member 95 '(not shown). If the image pickup device 9 was previously oriented in the forward direction, it is oriented in the rearward direction after being transferred to the opposite side of the carrying device 2. By means of a ball joint, see dome 93 of the holding device 91, the image pickup device 9 can be easily pivoted by a hand movement by 180 °, so that again a forward orientation is achieved.

The displacement of the shoe 5 and the guide device 8 of z. B. a position in front of the left eye to a position in front of the right eye can be done with a hand movement by moving along the guide rail 4. The locking of the shoe 5 is carried out in each case by means of a pressure piece and the locking cam 43. The implementation of the image pickup device 9 of a z. B. left on the right side of the support device 2 also takes place only with one hand, so that in the display device according to the invention no costly disassembly or discontinuation of the support device from the head of the user is required.

Claims

Claims:

A display device (1) comprising: a user-settable head support (2), an image display device (7) for displaying an image toward an eye of the user, the image-reproducing device (7) being attached to a headband (7) 3) of the carrying device (2) provided guide rail (4) by means of a guide device (8) is mounted.

2. Display device (1) according to claim 1, wherein the guide rail (4) has a length such that a displacement of the image display device (7) is accessible from one eye to another eye of the user.

3. Display device (1) according to claim 1 or 2, wherein the guide device

(8) has a sliding block (5) and a clamping shoe (6) attached thereto.

4. Display device (1) according to claim 3, wherein the clamping shoe (6) on the sliding block (5) by means of a ball joint (51) is mounted.

5. Display device (1) according to one of claims 3 or 4, wherein the clamping shoe (6) has a linear guide surface (61a, 61b, 62a, 62b).

6. Display device (1) according to one of claims 3 to 5, wherein a displacement of the clamping shoe (6) after advancing of at least one on the ball (52) pressing jaw (61, 62) is achievable.

7. Display device (1) according to one of claims 3 to 6, wherein the clamping shoe (6) has an additional ball joint (68).

8. Display device (1) according to claim 7, wherein the ball head of the additional ball joint (68) with an elastomer (69) is in touching contact.

9. Display device (1) according to one of claims 1 to 8, wherein the

Image reproduction device (7) is coupled to the guide rail (4) by means of a flexible metal tube.

10. Display device (1) according to one of claims 1 to 9, wherein the

Guide rail (4) plastic.

11. Display device (1) according to one of claims 1 to 10, wherein the guide rail (4) has at least one bead (41) and an equidistant to an outer edge of the guide rail (4) extending guide channel (42).

12. Display device (1) according to one of claims 1 to 11, wherein the guide rail (4) is arcuate.

13. Display device (1) according to one of claims 1 to 12, wherein the

Guide rail (4) locking cams (43).

14. Display device (1) according to one of claims 1 to 13, wherein the carrying device (2) on the headband (3) has a holding device (91) for an image pickup device (9).

15. Display device (1) according to claim 14, wherein the holding device (91) has a tongue and groove connection (92).

16. Display device (1) according to one of claims 14 or 15, wherein the

Holding device (91) has a cap (93) for a ball joint.

17. Display device (1) according to one of claims 1 to 16, wherein the carrying device (2) has at least one audio device.

18. Display device (1) according to one of claims 1 to 17, wherein the carrying device (2) has a cable guide (11).