JPH11231851A - Image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lower the display brightness of an image display device or turn off the display operation thereof when there is no one forward of a display, so that the service life of the display is extended. SOLUTION: In an image display device 8 having an image processing part for processing an image signal to be displayed, and displays 10 and 11 for displaying the image signal processed with the image processing part 9 as an input image, a sensor 12 for detecting whether there is a person forward of the displays 10 and 11, is provided thereon or in the vicinity thereof, and the display brightness of the displays 10 and 11 is lowered or the display operation thereof is turned off using the detection signal S of the sensor 12, when there is no one forward of the displays 10 and 11. According to this construction, the display brightness of the image display device 8 is lowered or the display operation thereof is turned off when no one is observing the displays 10 and 11, thereby extending the service life of the displays 10 and 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device for displaying general various images or medical images used for medical image diagnosis on a display such as a television monitor, and more particularly, to an image display device provided in front of the display. The present invention relates to an image display device that can reduce the display brightness or turn off the display when there is no person and extend the life of the display.

[0002]

2. Description of the Related Art Among the conventional image display devices, images obtained by, for example, an X-ray image diagnostic device used for medical image diagnosis include a fluoroscopic image and a photographed image. The perspective image is
A moving image obtained by irradiating weak X-rays, and an image for confirming a position when a catheter or a guide wire for injecting a contrast agent for mainly imaging is inserted into the body of the subject. It is. On the other hand, the captured image advances the catheter or guide wire to the lesion while viewing the above-mentioned fluoroscopic image, and after setting the radiographing position and the like, irradiates X-rays several tens times that of the fluoroscopic image to depict even fine blood vessels. This is an image for making a diagnosis. The facility for performing the above-mentioned X-ray inspection is provided with an imaging room for performing an inspection while the operator sees the fluoroscopic image and the captured image, and an operation room adjacent to the imaging room so that the imaging room can be observed through lead glass. I have. Then, television monitors are arranged in both rooms, and necessary images are displayed on the respective television monitors.

[0003] In the conventional X-ray image diagnosis, the subject is inspected by lowering the illuminance in the imaging room, but recently, the inspection is performed without lowering the illuminance with the advancement of diagnostic procedures. Things are becoming more common. For this reason, the display brightness of a television monitor is improved in accordance with the high illuminance in a shooting room, and those having a display brightness of 600 cd / m ² or more are also used. With the increase in the brightness of the television monitor, its life and image burn-in have become problems.

[0004]

In such a conventional X-ray diagnostic imaging apparatus, a television monitor arranged in a shooting room actually requires a high-brightness television monitor. After the subject enters the radiographing room and undergoes an X-ray inspection on the table, after the inspection is completed, the patient exits the room, and then performs hard copy work of the photographed image on X-ray film and various analysis work using the photographed image. The operation is performed on a television monitor arranged in the operation room. At this time, since the image remains displayed on the high-brightness television monitor arranged in the shooting room even though there is no observer such as an operator, the image display becomes useless. there were. Therefore, the life of the high-brightness TV monitor is shortened,
Screen burn-in sometimes occurred. To deal with this, the high-brightness television monitor may be replaced, but the cost is high because the special monitor is expensive.

Accordingly, the present invention has been made to address such a problem and to reduce the display brightness or turn off the display when there is no person in front of the display to extend the life of the display. It is an object of the present invention to provide an image display device capable of performing the above.

[0006]

In order to achieve the above object, an image display apparatus according to the present invention comprises: an image processing unit for processing an image signal to be displayed; and an image processing unit for inputting the image signal processed by the image processing unit. An image display device comprising: a display sensor for detecting whether or not there is a person in front of the display device at or near the display device; When there is no person in front of the display using the detection signal of (1), the display brightness of the display is reduced or the display is turned off.

[0007] The sensing sensor is configured such that the directional angle of a detection visual field for detecting whether or not a person is in front is arbitrarily adjustable.

[0008]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is an explanatory diagram showing an embodiment of an image display device according to the present invention, and is a configuration diagram showing a state applied to an X-ray diagnostic imaging device as an example. This X-ray image diagnostic apparatus irradiates an X-ray to a subject 2 lying on a table 1, collects a transmission X-ray image of the subject 2, converts the X-ray image into an image, and obtains a fluoroscopic image and a captured image. An X-ray tube 3 that emits X-rays to the subject 2 and an image intensifier (hereinafter referred to as an “intensifier”) that transmits a transmitted X-ray image transmitted through the subject 2 and converts the transmitted X-ray image into an optical image. II ")
4, a support 5 for supporting the X-ray tubes 3 and II4 in opposition with the subject 2 in between, a distributor 6 for distributing the optical image output from the II4, and a distributor 6 An imaging device 7 such as a television camera that captures the converted optical image and converts it into an image signal, and an image display device 8 that processes the image signal from the imaging device 7 and displays an image.

The image display device 8 includes an image processing unit 9 for processing an image signal to be displayed input from the image pickup device 7,
It has display units 10 and 11 such as a television monitor for inputting the image signal processed by the image processing unit 9 and displaying it as an image. One display 10 is, for example, a television monitor arranged in an operation room, and the other display 11 is, for example, a television monitor arranged in a shooting room.

An X-ray image is emitted from the X-ray tube 3 supported on one end of the supporter 5 to the subject 2 and transmitted through the subject 2 placed on the table 1. Is converted to an optical image by II4, and the image
After the image is captured by the imaging device 7 and converted into an image signal, the image is processed by the image processing unit 9 of the image display device 8, and the processed image signal is input and displayed on the operation room. Images are displayed on the display 10 and the display 11 arranged in the photographing room, respectively.

Here, in the present invention, a human sensor 12 is provided at or near the display 11 disposed in the photographing room. The sensing sensor 12 detects whether a person is in front of the display 11 or not.
For example, the sensor 11 includes an infrared sensor or an optical sensor, and the observer (the subject 2, the operator,
The presence or absence of another operator is detected and a detection signal S is output. Then, the detection signal S is sent to the display 11 via a signal line, and when no person is in front of the display 11, the display brightness of the display 11 is reduced or the display is turned off. It has become.

More specifically, as shown in FIG. 2, the sensing sensor 12 is installed at the front of the upper surface of the display 11 arranged in the photographing room. As shown in FIGS. 3A and 3B, the detection visual field 13 for detecting whether or not a person is in front of the sensing sensor 12 is, for example, about 70 in a horizontal plane.
Degree (see (a)), for example, about 70 in a vertical plane.
Degree (see (b)). Therefore, an observer such as the subject 2 and the surgeon in front of the display 11 can be almost surely detected. Note that the detection visual field 13 is not limited to about 70 degrees, but may be an appropriate angle such as about 90 degrees or about 50 degrees.

Further, as shown in FIG. 4, the installation position of the sensing sensor 12 is slightly shifted rearward from the front side of the display 11 so that the lower part of the detection field 13 shown in FIG. By shaving only, a detection field 13 ′ of only about 50 degrees in the vertical plane, for example, may be obtained. At this time, the subject 2 on the table 1 is not detected, and the operator 14
Only can be detected. Therefore, when the operator 14 temporarily leaves the subject 2 or moves to the operation room during the X-ray examination of the subject 2, the presence or absence of only the operator 14 is detected. be able to. The subject 2
This is because the operator of the display 11 is not as important as the operator 14.

Next, the operation of adjusting the display luminance of the display 11 in the image display device 8 configured as described above will be described.
This will be described with reference to FIG. First, when the sensing sensor 12 shown in FIG. 1 detects an observer such as the subject 2 or the operator 14 in front of the display 11 as shown in FIG.
(A) As shown in FIG.
Turns on. As a result, the sensing sensor 12 sets the detection signal Sa to H (high) meaning detection of the presence of an observer as shown in FIG. 5B, and displays the detection signal Sa as shown in FIG. To send to. At this time, the detection signal Sa serves to increase the display luminance of the display 11 so that the display 11 displays an image with high luminance.

Next, the operator 14 or the like moves to move the sensing sensor 1.
When the detection sensor 12 goes out of the range of the detection visual field 13 or 13 ′ of FIG.
(A) As shown in FIG.
a is turned off. Accordingly, the sensing sensor 12 changes the detection signal Sa to L (low), which indicates detection of no observer.
However, as shown in FIG. 5B, a delay time T of a predetermined period from the turning off of the sensing data Da to the L of the detection signal Sa.
d is set. Then, the detection signal S which becomes L
When a is input to the display 11 shown in FIG. 1, the display luminance of the display 11 is reduced or the display is turned off. At this time, by setting the delay time Td, malfunction can be prevented when an object that blocks infrared rays or light or the like temporarily crosses the front of the sensor 12.

Thereafter, when the surgeon 14 and the like return to the front side of the display 11 again, the sensing sensor 12 detects the observer, and the second sensing at the sensing sensor 12 as shown in FIG. Is turned on. Then, as in the previous case, the sensing sensor 12 sets the second detection signal Sb to H as shown in FIG. 5B and sends the detection signal Sb to the display 11 as shown in FIG. . Thus, the display 11 again displays an image with high luminance. In this case, as shown in FIG. 4, when only the operator 14 is detected, the operator 14 temporarily stops the subject 2 during the examination.
When the subject leaves or moves to the operation room, the detection signal is set to L even if the subject 2 is in front of the display 11 to reduce the display brightness of the display 11 or to reduce the display. Can be turned off.

Next, the operation when the observer such as the surgeon 14 moves or returns in a short time in front of the display 11 will be described. 5 (c) and 5 (d), the operation from when the first sensing data Da of the sensing sensor 12 is turned on / off to when the first detection signal Sa is output is the same as that shown in FIGS. Exactly the same as b), but assuming that the timing at which the surgeon 14 and the like return to the front side of the display 11 again is within the above-described delay time Td as shown in FIG. At that timing, the second sensing data Db is turned on, and the second detection signal Sb also becomes H as shown in FIG. At the timing when the second sensing data Db is turned on, the first detection signal Sa is still in the H state, so that the detection signals Sa and Sb are kept in the H state in a continuous state.

As a result, the above-mentioned sensing sensor 12 is
As shown in (d), the detection signals Sa and Sb which keep H in a continuous state are sent to the display 11 shown in FIG. 1, and the display 11 continues to display an image with high luminance. In this case, if the delay time Td shown in FIG. 5B is set to several minutes, the subject 2 enters the imaging room for the X-ray examination, and is placed on the table 1 before the examination. Until the end of the photographing room after the end, the observer such as the operator 14 can leave the front of the display 11 or return, and the display luminance of the display 11 can be kept high. Inspection can be performed smoothly.

Next, the operation when the output of the detection signal of the sensing sensor 12 is performed in two stages will be described with reference to FIG. Turning on and off the sensing data D shown in FIG. 6A is exactly the same as turning on and off the sensing data Da shown in FIG. When the sensing data D is turned off, the sensing sensor 12 shown in FIG.
The first detection signal S ₁ and the second detection signal S ₂ shown in FIGS. 6B and 6C are transmitted as two-stage detection signals.
At this time, although not shown in FIG.
The number of signal lines from 2 to the display 11 is two.

The first detection signal S ₁ serves to increase the display luminance of the display 11 to high luminance, for example, 100% luminance. The delay time from the turning off of the sensing data D is Td of a predetermined period. _Has been set to ₁ . Further, the second detection signal S ₂ indicates that the display luminance of the display 11 is low, for example, 50.
% Intended to serve as the brightness, the delay time from the OFF sensing data D is set to Td ₂ of longer duration than the Td _1. Therefore, after the sensing sensor 12 detects that there is no observer such as the surgeon 14 and the sensing data D shown in FIG. 6A is turned off, the delay time T shown in FIG.
period of d ₁ is the first detection signals S ₁ input, display 11 is a high brightness display images, for example, 100% luminance. Furthermore, Figure 6 after the end of the delay time Td ₁ (c)
In the remaining period of the delay time Td ₂ shown in FIG. 5, the display 11 displays the image at a low luminance, for example, at 50% luminance by the input of the _second detection signal S ₂ . After the end of the delay time Td ₂ shown in FIG. 6C, the first and second detection signals S ₁ , S ₁ ,
Since S ₂ becomes L both the time to turn off the image display of the display unit 11.

In the case of FIG. 6, even when the operator 14 and the like are away from the front side of the display 11, inspection staff other than the operator 14 and the like outside the detection field of view of the sensing sensor 12 can be used.
Until the end of the delay time Td ₂ shown in FIG.
Since the image can be viewed with the luminance, there is an advantage that the inspection staff can check the state of the subject 2 with the image. Further, as shown in FIG. 6C, since the image can be sufficiently observed even in a state where the display luminance of the image is lowered, the delay time Td ₁ of the first detection signal S ₁ is set short, and the surgeon 14 and the like are set. If the distance from the front of the display 11 for a short period of time decreases the display brightness of the image, the inspection will not be disturbed significantly. In this case, the period of the low-luminance display of the display 11 can be lengthened.

FIG. 7 is an explanatory view showing another embodiment of the sensing sensor 12. In this embodiment, the directional angle of the detection visual field 13 for detecting whether or not there is a person in front is arbitrarily adjustable. Specifically, a leg 16 is erected on the table 15, a case 17 is provided at an upper end of the leg 16, and a sensing unit 18 such as an infrared sensor or a light sensor is provided inside the case 17. ing. The case 17 is attached to the upper end of the leg 16 by, for example, a universal joint structure at the bottom of the case 17, so that the entire mounting angle of the case 17 can be freely set in three axial directions. It is configured so that it can be set. Therefore, the angle of the case 17 can be adjusted in the rotation direction, the front-rear direction, and the left-right direction with respect to the center axis 19 of the leg 16. From this, the sensing unit 1
8 is also adjusted in orientation with the case 17, and FIG.
As shown in (b), the directional angle of the detection field 13 of the sensing sensor 12 can be arbitrarily adjusted as shown by a solid line or a broken line.

As shown in FIG. 7, a detection indicator lamp 20 is provided in a part of the case 17, and when the directional angle of the detection field 13 of the sensing sensor 12 is changed as described above, the object is detected. Is detected, the detection display lamp 20 is turned on. This is shown in FIG.
The pilot data and the LED may be turned on by taking in the sensing data Da or the detection signal Sa in (b). Further, in FIG.
FIG. 3B shows a volume for arbitrarily adjusting the delay time Td in FIG.

FIG. 9 is a use example showing a state in which the sensing sensor 12 shown in FIG. By arranging the sensing sensor 12 at the forefront of the display 11 and tilting it slightly upward to adjust the angle, the detection field 13 is set so as to detect only the operator 14 without detecting the subject 2 on the table 1. Can be determined. Subject 2
In order to detect the surgeon, the detection sensor 12 is tilted slightly below the horizontal and the angle is adjusted, so that the directional angle of the detection visual field 13 is set so as to detect the operator 14 and the subject 2. You can decide. Sensing sensor 1 at this time
At the time of setting the angle 2, the adjustment is made while observing the lighting state of the detection display lamp 20 to obtain the desired detection field 13.
Can be easily set.

In the above description, the sensing sensor 12 is provided directly on the upper surface of the display 11 as shown in FIG. 2, FIG. 4, and FIG. 9, but the present invention is not limited to this. Alternatively, it may be arranged in the vicinity of the display 11 by an appropriate installation means. Further, the sensing sensor 12 is provided only in the display 11 arranged in the photographing room shown in FIG. 1, but is not limited to this, and is also provided in the display 10 arranged in the operation room. The display brightness of each of 10 and 11 may be reduced or the display may be turned off.

FIG. 10 is an explanatory view showing another embodiment of the connection of the sensing sensor 12. In this embodiment, the detection signal S output from the sensing sensor 12 is sent to the image processing unit 9. In this case, the detection signal Sa shown in FIG. 5 or FIG. 6, by entering an Sb or S _1, S ₂ to the image processing unit 9, by lowering the video level of the image signal output from the image processing section 9 , The result display 1
It operates to reduce the display luminance of each of 0 and 11 or to turn off the display. In this example, the display 1
It is also possible to lower the luminance of only a specific portion (for example, a region of interest) in the images displayed at 0 and 11.

In the above description, a state in which the present invention is applied to an X-ray image diagnostic apparatus as an example of an image display apparatus has been described. However, the present invention is not limited to this, and a general image display apparatus having a display, For example, the present invention can be similarly applied to a television, a word processor, a personal computer, and the like. Further, the display brightness or display of a plurality of displays can be simultaneously switched by the output of one sensing sensor.

[0028]

The present invention has been configured as described above.
In the display or in the vicinity thereof, a detection sensor for detecting whether or not there is a person in front of the display is provided, and the detection sensor detects the presence or absence of an observer of the display and outputs a detection signal thereof, By utilizing this detection signal, when there is no person in front of the display, the display luminance of the display is reduced or the display is turned off. When there is no observer of the display, the display luminance is displayed. Can be reduced or the display can be turned off to extend the life of the display. Therefore, it is possible to prevent an image from being displayed with high luminance even when there is no observer, and to eliminate a useless image display state. This makes it possible to extend the life of a high-brightness television monitor or the like, or prevent screen burn-in. Although the high-brightness television monitor is a special monitor and expensive, the replacement interval is long and the cost can be reduced. Further, the power consumption of the display can be reduced, and the power cost can be reduced.

Also, in the above-mentioned sensor, in which the directional angle of the detection visual field for detecting whether or not a person is in front is adjustable arbitrarily, the observer can be adjusted according to the use state of the image display device. The directional angle of the detection visual field to be detected can be arbitrarily adjusted to achieve harmony between ease of image observation and extension of the life of the display.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an embodiment of an image display device according to the present invention, and is a configuration diagram showing a state applied to an X-ray image diagnostic device as an example.

FIG. 2 is a perspective view showing an installation state of a sensing sensor with respect to an upper surface of a display.

FIGS. 3A and 3B are a plan view and a side view showing a detection field of view of the sensing sensor. FIGS.

FIG. 4 is a side view illustrating a state where the installation position of the sensing sensor is slightly shifted rearward from the front side of the display and the lower part of the detection visual field is cut off by an appropriate angle;

FIG. 5 is a timing chart for explaining an operation of adjusting a display luminance of a display by a sensing sensor.

FIG. 6 is a timing chart for explaining an operation of adjusting the display luminance of the display device when the output of the detection signal of the sensing sensor has two stages.

FIG. 7 is an explanatory diagram showing another embodiment of the sensing sensor.

8A and 8B are a plan view and a side view showing a state in which the directional angle of a detection field of view of a sensing sensor can be arbitrarily adjusted.
It is.

FIG. 9 is a side view showing a use example in which the sensing sensor shown in FIG. 7 is arranged on the upper surface of the display.

FIG. 10 is an explanatory diagram showing another embodiment of the connection of the sensing sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Table 2 ... Subject 3 ... X-ray tube 4 ... II 5 ... Supporter 6 ... Distributor 7 ... Imaging device 8 ... Image display device 9 ... Image processing part 10, 11 ... Display device 12 ... Sensing sensor 13, 13 '... detection field of view 14 ... surgeon 15 ... table 16 ... leg 17 ... case 18 ... sensing part 19 ... center axis of the leg 20 ... detection display lamp 21 ... volume S ... detection signal

Claims (2)

[Claims] 1. An image display apparatus comprising: an image processing unit that processes an image signal to be displayed; and a display that inputs the image signal processed by the image processing unit and displays the image signal as an image. A sensing sensor for detecting whether or not a person is in front of the display is provided at or near the display, and when a person is not in front of the display by using a detection signal of the sensing sensor, the sensor is used. An image display device, wherein the display brightness of a display is reduced or the display is turned off. 2. The image display device according to claim 1, wherein the sensing sensor is configured such that the directional angle of a detection visual field for detecting whether or not a person is in front is arbitrarily adjustable.