JPH07319571A - Image display device - Google Patents

Abstract

PURPOSE:To permit only a specified person to observe an image on a display screen. CONSTITUTION:An information processor 100 is provided with image memory in which image information A to be displayed and image information B to disturb display are stored, a switching signal generating part which generates a switching signal to decide which image information out of two pieces of image information A and B should be displayed, and a display control part which reads in the image information A in display image memory and the image information B in disturbance display image memory and performs control so as to display either the image information A or B based on the switching signal of the switching signal generating part, and the reading window 202 of a reader 200 is constituted of a switching signal receiving part 201 which receives the switching signal of the switching signal generating part, and a liquid crystal shutter controlled so as to transmit light on the display screen when the image information A is being displayed and to cutoff the light on the display screen when the image information B is being displayed on the display screen based on an inputted switching signal.

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, and more particularly to an image display of an information processing device.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of a conventional image display device. The conventional image display device includes an information processing unit 1, an image memory 2, a display control unit 3 and a display screen 4. The conventional image display device is configured as described above, the information processing unit 1 stores the image information to be displayed in the image memory 2, and the display control unit 3 displays the image information stored in the image memory 2 on the display screen 4. The display screen 4 creates an image on the screen according to the transferred image information.

[0003]

In the conventional image display device as described above, when the display screen 4 is viewed, a person can see the display screen 4.
Because you can see the image displayed on the display screen 4
There is a problem that it is difficult to identify the person who views the image.

In order to eliminate the above-mentioned drawback that the person who views the image on the display screen of the image display apparatus cannot be specified, the present invention makes it possible for only a specific person to see the image on the display screen. The purpose is to provide.

[0005]

An image display apparatus according to the present invention has an information processing apparatus having a display screen and a reading window, and is a person who is allowed to read an image displayed on the display screen. The information processing device comprises a reading device to be mounted, a display image memory for storing image information for displaying, a disturbing image memory for storing image information for disturbing the display, and a display image memory for displaying. An information processing unit that writes image information in the display image memory and writes image information for disturbing the display in the disturbing image memory, and a switching signal that determines which of the two image information is displayed on the display screen. A switching signal generator that uses a pseudo-random number, the image information for display stored in the display image memory and the image information for display stored in the obstruction display image memory are read. A display control unit that controls to display on the display screen either the image information for display or the image information for obstructing the display, which is input by the information processing unit based on the switching signal of the switching signal generation unit. The reading device includes a switching signal receiving unit that receives the switching signal of the switching signal generating unit of the information processing device, and a display on the display screen of the information processing device based on the switching signal input to the switching signal receiving unit. When the image information for displaying is displayed, the light of the display screen is transmitted, and when the image information for obstructing the display is displayed, the light of the display screen is blocked. And a reading window provided with shutter means.

[0006]

In the image display device according to the present invention, in the information processing device, the display control unit of the information processing unit displays image information stored in the display image memory by the information processing unit and the display stored in the obstruction display image memory. The image information for performing the image reading is read, and any one of the image information is displayed on the display screen based on the switching signal generated by using the pseudo random number of the switching signal generating unit. On the other hand, in a reading device worn by a person who is allowed to read an image, the switching signal receiving unit receives the switching signal of the switching signal generating unit of the information processing device, and the shutter means of the reading window is input to the switching signal receiving unit. Based on the switching signal, when the image information for displaying on the display screen of the information processing device is displayed, the light of the display screen is transmitted, and the image information for disturbing the display is displayed on the display screen. At this time, the light on the display screen is blocked, so that only a specific observer can read the display contents.

[0007]

1 is a block diagram showing an outline of an image display device according to an embodiment of the present invention, FIG. 2 is a block diagram showing an information processing device of the image display device, and FIG. 3 is a diagram showing the image display device. FIG. 4 is a block diagram showing the reading device, and FIG. 4 is a perspective view showing a configuration of a reading window of the reading device of the image display device. Figure 1
In FIG. 1, reference numeral 100 denotes an information processing device, which has a display screen 105 and an output terminal 107. Reference numeral 200 denotes a reading device worn by a person who is permitted to read an image.
Input terminal 201, which is a switching signal receiving unit to which the signal output from the output terminal 107 of 0 is input, and the information processing device 10.
The reading window 202 is located on the line of sight of the display screen 105 of the operator of 0.

In FIG. 2, an information processing apparatus 100 stores an information processing unit 101 for writing to a memory, a display image memory 102 for storing image information for displaying, and image information for disturbing display. Disturbing image memory 103 and display control unit 104 for controlling the display of image information
And a display screen 105 and a switching signal generator 106 that generates a switching signal for determining the display screen.
3 and 4, the reading window 202 of the reading device 200
Is provided with a liquid crystal shutter 10 that is a shutter unit that is controlled by a switching signal input to the input terminal 201 and transmits or blocks incident light. The liquid crystal shutter 10 is configured by sandwiching a nematic liquid crystal 13 that has been subjected to a 90 ° orientation process between transparent electrodes 12 and 14, and further arranging polarizing plates 11 and 15 on both sides thereof, and the polarizing plates 11 and 15 can pass through. Electrode with transparent plane of polarized light 1
It is set so as to be parallel to the alignment direction of the liquid crystal in contact with 2 and 14. In addition, the transparent electrodes 12 and 14
Are connected to the control terminals 16 and 17, and the control terminals 16 and 17 are connected to the input terminal 201.

The operation of the liquid crystal shutter 10 will be described. When a voltage is applied to the control terminals 16 and 17, the nematic liquid crystal 13 is aligned vertically to the transparent electrodes 12 and 14. At this time, the polarization plane of the light incident on the polarizing plate 11 is the transparent electrode 12, the nematic liquid crystal 13 and the transparent electrode 14.
To reach the polarizing plate 15. However, since the plane of polarization of this light is perpendicular to the plane of polarization of light that can pass through the polarizing plate 15, it cannot pass through. When no voltage is applied to the control terminals 16 and 17, the polarization plane of the light incident on the polarizing plate 11 is 90 ° when passing through the nematic liquid crystal 13.
Because it rotates, it can pass through. That is, this liquid crystal shutter 1
Reference numeral 0 has a shutter function of controlling the voltage applied to the control terminals 16 and 17 to allow the light incident on the polarizing plate 11 to pass through or block the polarizing plate 15.
The voltage applied to the control terminals 16 and 17 becomes the switching signal of the switching signal generator 106 in this embodiment.

The operation of the image display device of the embodiment of the present invention having the above-described structure will be described. First, the information processing device 1
The information processing unit 101 of 00 writes the image information A to be displayed in the display image memory 102 and the image information B for disturbing the display in the disturbing image memory 103. Further, the switching signal generator 106 displays which of the two image information A and B input to the display controller 104 is displayed on the display screen 105.
The switching signal C for determining whether to display is generated using a pseudo random number.

Next, the display control unit 104 reads the respective image information A and B stored in the display image memory 102 and the interference memory 103, and the switching signal generation unit 106.
Either the image information A or B is displayed on the display screen based on the switching signal from. At this time, the maximum time for which the display screen 105 continuously displays one image of the image information A and B is several tens of ms. As a result, the information processing device 10
A person who directly views the display screen 105 of 0 sees the two images of the image information A and B in a superimposed manner, and it is difficult to read the image information A from the outside. In addition, the switching signal generator 106
Also outputs the switching signal C to the output terminal 107.

The switching signal C output to the output terminal 107 is input to the input terminal 201 of the reading device 200, and then to the control terminals 6 and 7 of the liquid crystal shutter 10 of the reading window 202. The liquid crystal shutter 10 transmits the light based on the switching signal C only when the image information A is displayed on the display screen 105, and blocks the light when the other image information B is displayed. As a result, the operator can read the image of the image information A on the display screen 105 of the information processing apparatus 100 through the reading window 202 without being disturbed by the image information B for obstructing the display. In the above embodiment, the liquid crystal shutter is used as the shutter means of the reading window 202, but it is not limited to this as long as it selects and transmits or blocks a plurality of lights according to the switching signal C. Needless to say.

[0013]

As described above in detail, according to the present invention, in the information processing apparatus, the display control section of the information processing section displays the image information stored in the display image memory and the interference display image. The image information for display stored in the memory is read, and any one of the image information is displayed on the display screen based on the switching signal generated by using the pseudo-random number of the switching signal generator, while the image In a reading device worn by a person who is allowed to read, the switching signal receiving unit receives the switching signal of the switching signal generating unit of the information processing device,
The shutter means of the reading window transmits the light of the display screen when the image information to be displayed on the display screen of the information processing device is displayed based on the switching signal input to the switching signal receiving unit, and transmits the light of the display screen. When the image information for obstructing the display is displayed, the light of the display screen is blocked,
Only a specific operator wearing a reading device can read the display contents of image information for display,
An effect can be expected for the realization of an information processing apparatus that requires protection of visual information within the visual fields of a plurality of specific operators.

[Brief description of drawings]

FIG. 1 is a block diagram showing an outline of an image display device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an information processing device of the image display device.

FIG. 3 is a block diagram showing a reading device of the image display device.

FIG. 4 is a perspective view showing a configuration of a reading window of the reading device of the image display device.

FIG. 5 is a block diagram of a conventional image display device.

[Explanation of symbols]

 100 Information Processing Device 101 Information Processing Unit 102 Display Image Memory 103 Interference Image Memory 104 Display Control Unit 105 Display Screen 106 Switching Signal Generation Unit 200 Reading Device 201 Input Terminal 202 Reading Window (Shutter Means)

Claims (1)

[Claims] 1. An information processing device having a display screen, and a reading device having a reading window and worn by a person who is permitted to read an image displayed on the display screen. , A display image memory for storing image information for displaying, an interference image memory for storing image information for disturbing the display, and image information for displaying to the display image memory and disturbing the display An information processing unit for writing image information for performing the image information in an interference image memory; a switching signal generation unit for generating a switching signal for determining which of the two image information is displayed on a display screen by using a pseudo random number; The image information for display stored in the display image memory and the image information for display stored in the obstruction display image memory are read, and information based on the switching signal of the switching signal generator is read. And a display control unit that controls to display on the display screen any one of the image information for display and the image information for obstructing the display input by the processing unit. Based on the switching signal receiving unit that receives the switching signal of the switching signal generating unit, and the switching signal input to the switching signal receiving unit, when the image information for displaying on the display screen of the information processing device is displayed, A reading window provided with a shutter means that transmits light from the display screen and is controlled so as to block light from the display screen when image information for obstructing the display is displayed on the display screen. An image display device characterized by the following.