JP2005318937A - Display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the operability of a picture display part for a display device by widening its movable range with the transfer of the body and eyes of an observer when the observer observes a picture projected to a display panel from a projector. <P>SOLUTION: The medical display device is provided with: a panel support apparatus 27 which can relatively move a display panel part 7 for displaying a picture which can be observed by the observer by receiving the projection light of generated picture information; and an encoder 28 for detecting a direction and quantity of movement of the display part 7. The medical display device is provided with a control circuit which controls the operation of a picture processing part 6 and an adjusting apparatus with an input signal from the encoder for correcting the deviation of the picture with the movement of the display panel part 7 with respect to the projector 1 by operating the picture processing part 6 for correcting the picture and the projection optical system of the projector 1 for adjusting a projecting state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a display device that is projected from a projection device onto a display panel for observation.

Conventionally, Patent Literature 1 or Patent Literature 2 discloses a medical display device in which projection light is projected onto a reflecting means and displayed by a projection device.
In the display device of Patent Document 1, signal light including predetermined image information is irradiated from a projector toward a reflective hologram screen, and an observer observes an image diffracted by the hologram screen. Further, the display device of Patent Document 2 projects light beams from two image projectors onto an image projection panel having a Fresnel lens, and the viewer reflects the three-dimensional image by two images reflected by the image projection panel. Can be observed.
JP2003-066536 JP 2003-233031 A

In the surgical operation, the position of the operator is constantly changed and the position of the eye is constantly changed as the operation progresses. For this reason, the screen itself that has been installed up to now may be in the way, or the screen may be changed to a direction that is difficult for the observer to observe.
However, since the display device of Patent Document 1 has a structure in which both the screen and the projector are supported in a fixed relationship, the screen and the projector cannot be moved synchronously in pairs. Handling of the display device for use was inconvenient.

  On the other hand, in the display device of Patent Document 2, the screen and the image projector are attached to the same support arm, and positioning corresponding to the position of the surgeon's eyes can be achieved by the support arm. However, since the relative position of the screen and the image projector must always be kept constant in the method of Patent Document 2, it is necessary to move the two image projectors together in order to move the screen. . In this way, moving the two image projectors integrally with the screen leads to a limitation of the movable range due to an increase in size and a deterioration in operability due to an increase in weight.

  The present invention has been made paying attention to the above-mentioned problems, and the object of the present invention is to provide a display accompanying the movement of an observer's body and eyes in a display device that is projected from a projection device onto a display panel for observation. The image display unit of the apparatus has a wide movable range and is easy to operate.

According to the first aspect of the present invention, there is provided an image forming unit that generates image information, a projection apparatus that includes a projection optical system that projects the generated image information, and an observer who receives projection light projected from the projection apparatus. A display panel that displays an image that can be observed, panel support means that can move the display panel relative to the projection device, and a direction in which the display panel moves relative to the projection device And at least detection means for detecting the amount, image processing means for correcting an image generated by the image forming means of the projection apparatus, and adjustment means for adjusting the projection state by operating the projection optical system of the projection apparatus. At least one of the image processing means and the adjustment means according to an input signal from the detection means for correcting the image shift caused by the movement of the display panel unit relative to the projection device with respect to the projection device. And control means for controlling the operation of the square of the means is a medical display device characterized by comprising a.
The invention according to claim 2 includes an image forming unit that generates two images having parallax, a projection device that projects the two images by respective projection optical systems, and projection light projected from the projection device A display panel unit provided with a reflection unit provided with a positive lens action for reflecting and condensing an image that can be stereoscopically observed by the observer toward the observer, and the display with respect to the projection device Generated by panel support means capable of relatively moving the panel section, detection means for detecting the direction and amount of movement of the display panel section relative to the projection apparatus, and image forming means of the projection apparatus At least one of image processing means for correcting an image and adjustment means for adjusting a projection state by operating a projection optical system of the projection apparatus, and an image accompanying movement of the panel support means with respect to the projection apparatus Deviation And control means for controlling the operation of at least one means of the image processing means and said adjustment means by an input signal from said detecting means to correct a medical display device characterized by comprising a.
According to a third aspect of the present invention, the projection optical system includes any one of a zoom optical system and a focus optical system, and includes a driving unit that controls and drives the optical system included by the control unit. The medical display device according to claim 1 or 2.
According to a fourth aspect of the present invention, the projection optical system is driven by a movable reflecting member for changing a projection direction of an image projected from the projection device, and the movable reflecting member is controlled by the control means. The medical display device according to claim 1, wherein the medical display device includes a driving unit configured to perform driving.
The invention according to claim 5 is the medical display device according to any one of claims 1 to 4, wherein the image processing means has an electronic zoom function and a trapezoidal correction function.

  The invention according to claim 6 is characterized in that the projection device is incorporated in a chair on which an observer sits, and the display panel support means is connected to the chair. A medical display device according to claim 1.

  According to the present invention, image position movement of the display device accompanying movement of the observer's eyes can be realized only by movement of the display panel unit, so that a display device having a wide movable range and good operability can be provided.

[First Embodiment]
A display device according to a first embodiment of the present invention will be described with reference to FIGS.

(Constitution)
FIG. 1 is a side view showing a schematic structure of a display device according to the present embodiment, and FIG. 2 is a top view showing a schematic structure of the display device. In FIG. 1, reference numeral 1 denotes the entire projection apparatus, and the projection apparatus 1 is composed of a pair of left and right projection apparatuses 1 a and 1 b shown in FIG. 2 for performing stereoscopic (3D) observation. Each of the projection apparatuses 1a and 1b includes an LCD (Liquid Crystal Display) 2 (2a and 2b), a projection optical system 5 (5a and 5b), and an image processing unit 6.

  The LCDs 2a and 2b as image forming means shown in FIG. 2 have a parallax corresponding to an image captured by, for example, a stereoscopic microscope or a stereoscopic (3D) endoscope as a stereoscopic (3D) imaging device (not shown). One image is generated respectively. The images generated by the LCDs 2a and 2b are projected toward the display panel 7 described later by the corresponding projection optical systems 5a and 5b.

  Each of the projection optical systems 5a and 5b includes a zoom optical system 3 and a focus optical system 4. The zoom optical system 3 causes the images on the LCDs 2a and 2b to substantially match the size of the display panel 7, and the focus optical system. 4 projects the images on the LCDs 2a and 2b so that the images are focused on a display panel 7 to be described later.

  Here, as shown in FIG. 2, the center of the optical axis of each projection optical system 5 a, 5 b projects the center of the image of each LCD 2 a, 2 b onto the center of the display surface of the display panel 7. The projection optical systems 5a and 5b are arranged so as to be shifted in the vertical and horizontal directions with respect to the image center. Each projection device 1a, 1b uses the two projection optical systems 5a, 5b to superimpose the images of the respective LCDs 2a, 2b on the display surface of the display panel 7, and emits the projection optical systems 5a, 5b. The pupils 8a and 8b are projected onto the positions of the entrance pupils 9a and 9b of the observer 10 by the reflection action of the display panel 7.

  The image processing unit 6 performs processing to perform electronic zoom and keystone correction on images displayed on the LCDs 2a and 2b as image forming means.

  The pair of left and right projection apparatuses 1a and 1b incorporates the LCDs 2a and 2b, the projection optical systems 5a and 5b, and the image processing unit 6 in separate mirror bodies 11a and 11b, and the separate mirror bodies 11a and 11b are common. The image projector 13 is assembled to the unit case 12 as a single device unit. As shown in FIG. 1, the image projector 13 is attached to the middle of the support arm 15 of the gantry together with the unit case 12, and the display panel 7 is attached to the tip of the support arm 15 of the gantry. It has been.

  The display panel 7 receives image projections from the above-described projection devices 1a and 1b, and generates left and right exit pupils 9b and 9a individually corresponding to the right eye 16a and the left eye 16b of the observer 10, respectively. As shown in FIG. 3, a Fresnel concave mirror 21 constituting a light reflecting means is provided. The reflecting surface of the Fresnel concave mirror 21 is protected by a mirror coat 22. The Fresnel concave mirror 21 reflects the respective images 23 projected from the pair of left and right projection devices 1a and 1b by the positive (positive power) lens action of the Fresnel lens surface, and the right eye 16a and left eye of the observer 10 are reflected. The left and right images 23 individually corresponding to 16b are individually projected. The images 25b and 25a projected from the respective LCDs 2a and 2b of the projection devices 1a and 1b are incident on the left and right eyes 16a and 16b of the observer 10, and the observer 10 views the two images having the parallax on the left and right. Stereoscopic observation is performed by separately observing with the eyes 16a and 16b. Reference numerals 8a and 8b shown in FIG. 2 indicate exit pupils of the projection optical systems 5a and 5b, respectively. Reference numerals 9a and 9b indicate exit pupils projected on the left and right eyes 16a and 16b by the Fresnel concave mirror 21, respectively.

  As shown in FIG. 1, the image projector 13 is attached to a projection device holding unit 26 including a support arm 15 for the gantry, and the display panel 7 is also used as a support arm for the gantry as shown in FIG. 15 is attached to a panel support 27 including 15. The support arm 15 has a bent shape having a vertical portion 15a extending to the base of the gantry and a horizontal portion 15b extending horizontally from the upper end of the vertical portion 15a, and the image projection is performed on the base end portion of the horizontal portion 15b. The machine 13 is attached, and the panel support portion 27 is formed at the tip of the horizontal portion 15b. That is, the panel support means which can move the said display panel part relatively with respect to the said projection apparatus is constructed | assembled.

  The panel support portion 27 is attached so as to be rotatable about a rotation axis O1 oriented perpendicular to the tip of the horizontal portion 15b of the support arm 15. The rotation axis O1 is disposed on the reflective surface of the display panel 7 at a position passing through the center of the reflective surface. The display panel 7 may be provided with a grip portion (not shown) that is touched when the display panel 7 is moved.

  The panel support 27 is provided with detection means for detecting the relative rotation amount of the projection device holder 26 and the panel support 27 and the direction in which the projection support 27 is rotated. Here, the display support for the display around the rotation axis O1 is provided. An encoder 28 for detecting the rotation of the panel 7 is provided. The rotation detection signal from the encoder 28 is sent to the control unit 30.

In response to the signal, the control unit 30 outputs a command for causing the image processing unit 6 of the projection apparatus 1 to deform the image on the LCD 2 (such as electronic zoom and keystone correction).
The panel support 27 may be provided with a position adjusting means that can move in the axial direction of the rotation axis O1.

(Function)
Video signals for left and right images having parallax obtained by a stereoscopic imaging device (not shown) are input to the LCDs 2a and 2b of the projection devices 1a and 1b, respectively. As shown in FIG. 3, an image 25a having right parallax is displayed on the right LCD 2a, and an image 25b having right parallax is displayed on the left LCD 2b. The images 25a and 25b generated by the LCDs 2a and 2b are projected as images 23 superimposed on the surface of the same display panel 7 through the projection optical systems 5a and 5b.

  Then, the images 25a and 25b projected on the surface of the display panel 7 are reflected by the lens action of the Fresnel lens surface of the display panel 7, respectively, and positions corresponding to the right eye 16a and the left eye 16b of the observer 10, respectively. The exit pupils 8b and 8a (9b and 9a) of the images 25a and 25b of the LCD 2b and LCD 2a are projected onto the LCD 2b. Thereby, the observer 10 can perform stereoscopic observation.

  Next, in order to change the observation position, the observer 10 operates the panel support portion 27 together with the display panel 7 and rotates it around the rotation axis O1. The tilt state of the display panel 7 at this time is indicated by a broken line in FIG. The amount of rotation of the panel support unit 27 at this time is detected by the encoder 28, and the control unit 30 transmits a trapezoidal correction command to the image processing unit 6 of the projection devices 1a and 1b according to the data, and the images 25a and 25b. Perform keystone correction. FIGS. 4A and 4B show how the image on the display panel 7 changes when this keystone correction is executed. In the image shown in FIG. 4A, the angle between the projection optical axis and the surface of the display panel 7 is changed by the rotation of the display panel 7, and as a result, the image 23 projected from the projection device 1 onto the display panel 7 is distorted. It is a thing. The image shown in FIG. 4B shows the state of the corrected image 23 corrected by the image processing unit 6. With this series of operations and processing, even when the observer 10 rotates the display panel 7 and changes the direction of observation, good stereoscopic observation without distortion of the image 23 can be performed.

(effect)
According to the display device of the present embodiment, when changing the observation position of the observer 10, it is not necessary to move the display panel 7 and the projection device 1 integrally, and only the display panel 7 may be moved. The operability for changing the observation position is improved.

[Second Embodiment]
A display device according to a second embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

(Constitution)
In the present embodiment, a modification of the panel support portion 27 that supports the display panel 7 on the support arm 15 of the gantry is shown. The display panel 7 is held so as to be rotatable around a rotation axis O2 arranged in a horizontal direction. That is, the panel support means which can move the said display panel part relatively with respect to the said projection apparatus is constructed | assembled.

  The rotation axis O2 is disposed on the reflective surface of the display panel 7 at a position passing through the center of the reflective surface. Detection means is provided on the axis of the rotation axis O2 to detect the relative rotation amount of the support arm 15 and the display panel 7 and the direction in which the support arm 15 rotates, and an encoder 28 is provided here. The control unit 30 receives the detection signal from the encoder 28 and outputs a command for causing the image processing unit 6 of the projection apparatus 1 to deform the image on the LCD 2 (such as electronic zoom and keystone correction).

(Function)
When the observer 10 changes the observation position, an operation of rotating the display panel 7 about the rotation axis O2 in the horizontal direction is performed. The state of the operated display panel 7 is indicated by a broken line in FIG. At this time, the image 8 projected on the display panel 7 is in a distorted trapezoidal state as shown in FIG.

  On the other hand, the encoder 28 installed on the rotation axis O 2 detects the amount of rotation of the display panel 7 and transmits a trapezoidal correction command to the image processing unit 6. The image processing unit 6 corrects the shape of the image 23. Then, the image 23 projected on the display panel 7 is corrected to a rectangular shape as shown in FIG. With this series of operations, even when the observer changes the observation direction by rotating the display panel 7, good stereoscopic observation without image distortion can be performed.

(effect)
In this embodiment, it is possible to cope with a change in the position of the observer in the vertical direction. In addition to the vertical position change, the above-described first embodiment can be combined, and in this case, the vertical and horizontal observation position changes can be selectively performed.

[Third Embodiment]
A display device according to a third embodiment of the present invention will be described with reference to FIGS. The same components as those in the first embodiment described above are denoted by the same reference numerals, and detailed description thereof is omitted.

(Constitution)
FIG. 7 is a side view of the display device, and FIG. 8 is a top view of the display device. In FIGS. 7 and 8, reference numeral 41 denotes a chair for an observer to sit, which is a micro chair here. The chair 41 includes a base portion 42 with casters, a column portion 43, a seat surface 44, and a backrest 45.

  A projection device 46 is incorporated in the upper part of the backrest 45. The projection device 46 includes a pair of left and right projection devices 46a and 46b so as to perform stereoscopic (3D) observation. As shown in FIG. 7, each projection device 46 includes the LCD 2, the projection optical system 5, and the image processing unit 6, as in the case of the first embodiment described above.

  As shown in FIG. 7, mirrors 47a and 47b for refracting the projection light emitted from the projection optical system 5 of each projection device 46 toward the display panel 7 are located at a relatively high upper position of the backrest 45. , And the mirrors 47a and 47b are separately installed on the left and right as shown in FIG. The mirrors 47a and 46b are mounted so as to be movable in the vertical direction along the guide shaft 48 shown in FIG. 7, and are driven by a third motor 53 described later to adjust the direction of projection from the projection device 46. The means to do is comprised.

  The zoom optical systems 3 in the projection devices 46a and 46b are both driven by separate first motors 51, and the focus optical systems 4 are both driven by separate second motors 52. It has become so. Each of the mirrors 47 a and 47 b is driven by a separate third motor 53. Projection devices 46a and 46b, mirrors 47a and 46b, and motors 51, 52, and 53 are incorporated in the backrest 45 of the chair 41 so as not to interfere with the outside.

  Further, as shown in FIG. 8, an arm support portion 54 is provided on one side wall of the upper portion of the backrest 45, and a support arm 55 for supporting the display panel 7 is horizontally mounted on the arm support portion 54. It is attached so as to be rotatable around a rotation axis O3 in a proper direction. The support arm 55 includes a rear arm 56 and a front arm 57. The front arm 57 is assembled in the rear arm 56 so that it can be appropriately stored. The front arm 57 is supported by the rear arm 56 so as to be extendable in the longitudinal direction. Yes.

  As described above, the base end of the rear arm 56 is supported by the arm support portion 54 disposed on the side surface of the backrest 45 so as to be rotatable about the rotation axis O3. Further, the display panel 7 similar to the above is supported at the front end of the front arm 57 so as to be rotatable around a rotation axis O4 having a different direction from the rotation axis O3, for example, a vertical direction. That is, the panel support means which can move the said display panel part relatively with respect to the said projection apparatus is constructed | assembled.

  The front arm 57 is provided with detection means for detecting the amount of rotation of the display panel 7 around the rotation axis O4 with respect to the front arm 57 and the direction in which the display panel 7 rotates. Here, a first encoder 61 is provided. . The rear arm 56 is provided with a second encoder 62 as detection means for detecting the amount of expansion and contraction of the front arm 57 with respect to the rear arm 56 and its direction. The arm support portion 54 is provided with a third encoder 63 as detection means for detecting the amount of rotation of the rear arm 56 around the rotation axis O3 relative to the arm support portion 54 and the direction of rotation. Signals detected by the encoders 61 to 63 are sent to the control unit 30, and the control unit 30 outputs a command for driving the motors 51 to 53 in accordance with the detected signals.

(Function)
Video signals for left and right images having parallax obtained by a stereoscopic imaging device (not shown) are input to the LCDs 2a and 2b of the projection devices 1a and 1b, respectively. The images 25a and 25b emitted from the LCDs 2a and 2b pass through the projection optical systems 5a and 5b, are reflected by the corresponding mirrors 47a and 47b, and are projected onto the display panel 7.

  Then, by the Fresnel lens of the display panel 7 and its mirror coat, the exit pupils 8b and 8a of the images of the LCDs 2b and 2a are projected at the positions of the right eye 16a and the left eye 16b of the observer. Thereby, the observer 10 can observe three-dimensionally like the case of 1st Embodiment mentioned above.

  Next, the operation when the observer 10 changes the position at which the display panel 7 is observed will be described with reference to FIGS. First, FIG. 9 shows a case where the position of the display panel 7 is changed in the front-rear direction of the observer 10. The observer 10 moves the display panel 7 in the arrow direction shown in FIG. At this time, the front arm 57 moves relative to the rear arm 56, and the second encoder 62 detects the amount and direction of movement. The control unit 30 outputs a drive signal to the first motor 51 and the second motor 52 according to the input value of the second encoder 62. That is, as the position of the display panel 7 is changed, the size of the projected image on the display panel 7 changes (in the example of the operation in FIG. 9, the projected image becomes larger with respect to the display panel 7). The zoom optical system 4 is driven by the first motor 51 in order to return the projection image to an appropriate size (in the example of the operation in FIG. 9, the projection image is reduced). In addition, the second motor 52 drives the focus optical system 4 in order to adjust the focus to the surface position after the display panel 7 is moved. In addition, by this series of operations, the observer 10 can perform good stereoscopic observation even when the observation panel is changed by moving the display panel 7 in the front-rear direction.

  FIG. 10 shows a case where the display panel 7 is moved in the vertical direction of the viewer 10 and the support arm 55 is rotated to change the observation position up and down. That is, the observer 10 rotates the support arm 55 so as to move the display panel 7 in the direction of the arrow in FIG. At this time, the first encoder 61 detects the amount of rotation of the display panel 7 relative to the front arm 57 and the direction of movement thereof, and further determines the amount of rotation of the rear arm 56 relative to the arm support portion 54 and the direction of rotation thereof. This is detected by the encoder 63.

  Then, the control unit 30 outputs drive signals to the first motor 51 and the third motor 53 in accordance with the input values of the first encoder 61 and the third encoder 63. In addition, when the support arm 55 needs to be expanded and contracted according to the rotation of the support arm 55, the second motor 52 is also driven.

  That is, the mirror 47 is moved upward by the third motor 53 in order to align the center of the projected image with the center position of the display panel 7 after the movement. Further, the focus optical system 4 and the zoom optical system 3 perform image correction on the display panel 7 in accordance with a change in the distance between the LCD 2 and the display panel 7.

(effect)
In this embodiment, since it can respond to the observer's front-rear and vertical translation, it is possible to freely deal with the physique and posture of the observer sitting on the chair 41. Moreover, since the projection apparatus 1 and the projection optical system 5 are built in the backrest 45 of the chair 41, space saving can be achieved.

  In the present embodiment, the zoom optical system is used to correct the size of the projection image that accompanies the movement of the display panel 7. .

  In addition, since this embodiment is an example of a display that performs stereoscopic observation, two images having parallax are generated by the stereoscopic imaging device, respectively, but the present invention is not limited to such a case, This includes cases where general endoscopes, microscopes or ultrasonic diagnostic apparatuses receive image signals such as MRI or CT and display them. Further, the display panel unit receives signal light including predetermined image information from a projector. A display method such as a hologram screen for irradiation and display may be used.

  The present invention is not limited to the embodiment described above, and can be applied to other forms.

1 is a side view schematically showing a display device according to a first embodiment. The top view which shows roughly the display apparatus which similarly concerns on 1st Embodiment. Explanatory drawing of the principle of the projection display in the display apparatus which similarly concerns on 1st Embodiment. Explanatory drawing of the projection image in the display apparatus which concerns on 1st Embodiment similarly. The side view which shows schematically the display apparatus which concerns on 2nd Embodiment. Explanatory drawing of the projection image in the display apparatus which concerns on 2nd Embodiment similarly. The side view which shows schematically the display apparatus which concerns on 3rd Embodiment. The top view which shows roughly the display apparatus which similarly concerns on 3rd Embodiment. Explanatory drawing which similarly shows one motion of the display apparatus which concerns on 3rd Embodiment. Explanatory drawing which similarly shows the other motion of the display apparatus which concerns on 3rd Embodiment.

Explanation of symbols

1 ... Projection device 2 ... LCD
DESCRIPTION OF SYMBOLS 3 ... Zoom optical system 4 ... Focus optical system 5 ... Projection optical system 6 ... Image processing part 7 ... Display panel 27 ... Panel support part

Claims (6)

An image forming means for generating image information, a projection apparatus including a projection optical system for projecting the generated image information, and
A display panel unit that displays an image that can be observed by an observer in response to projection light projected from the projection device;
Panel support means capable of moving the display panel unit relative to the projection device;
Detecting means for detecting the direction and amount of movement of the display panel unit relative to the projection device;
At least one of image processing means for correcting an image generated by the image forming means of the projection apparatus and adjustment means for adjusting the projection state by operating the projection optical system of the projection apparatus;
Control for controlling the operation of at least one of the image processing means and the adjustment means by an input signal from the detection means in order to correct an image shift due to the movement of the display panel unit with respect to the projection device. Means,
A medical display device comprising: A projection device that has image forming means for generating two images with parallax, and projects the two images with respective projection optical systems;
A display panel unit provided with a reflecting means provided with a positive lens function for reflecting and condensing an image that can be stereoscopically observed by the observer by directing the projection light projected from the projection device to the observer; ,
Panel support means capable of moving the display panel unit relative to the projection device;
Detecting means for detecting the direction and amount of movement of the display panel unit relative to the projection device;
At least one of image processing means for correcting an image generated by the image forming means of the projection apparatus, and adjustment means for adjusting the projection state by operating the projection optical system of the projection apparatus;
Control for controlling the operation of at least one of the image processing means and the adjustment means by an input signal from the detection means in order to correct a shift of the image accompanying the movement of the panel support means with respect to the projection device. Means,
A medical display device comprising:   The projection optical system includes any one of a zoom optical system and a focus optical system, and includes a driving unit that controls and drives the optical system included by the control unit. 2. A medical display device according to 2.   The projection optical system includes a movable reflection member for changing a projection direction of an image projected from the projection device, and a drive unit that drives the movable reflection member under the control of the control unit. The medical display device according to claim 1, 2, or 3.   The medical display device according to claim 1, wherein the image processing unit has an electronic zoom function and a trapezoidal correction function.   6. The medical display device according to claim 1, wherein the projection device is incorporated in a chair on which an observer sits, and the display panel support means is connected to the chair. .

Images