Information display device and information display method
First Claim
1. A screen image converter comprising:
- a number array supplier for storing a number array and outputting the number array;
an image converter for converting the screen image by calculating a digital screen image data with the number array from the number array supplier; and
a memory storage for storing the converted image data generated by the image converter and outputting the converted image to the exterior, wherein the number array supplier has from the first to the Nth numerical sequences (N is an integer larger than
1) constituting a number array of n×
m (n and m are integers equal to or larger than
1), the image converter receives the Mth inputted image (Mε
{1, . . . , N}) of number array of n×
m, and receives the Mth inputted number array from the number array supplier, records the Mth conversion result generated by calculating the Mth inputted image and the Mth inputted number array in the image storage, and outputs the converted result from the image storage successively.
1 Assignment
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Accused Products
Abstract
In order to prevent interception of the information through the leakage electromagnetic waves when transmitting the information using an image display unit, an image converter generates plural converted images, stores the generated converted images in an image storage, an image output unit reads out the converted images from the image storage and transmits the converted images to a screen control unit successively. The screen control unit displays a reception image on an image display unit. The image output unit outputs the converted image group at a high speed, thereby performing a switching display on the image display unit, and to show an image visually equivalent to the input image.
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Citations
20 Claims
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1. A screen image converter comprising:
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a number array supplier for storing a number array and outputting the number array; an image converter for converting the screen image by calculating a digital screen image data with the number array from the number array supplier; and a memory storage for storing the converted image data generated by the image converter and outputting the converted image to the exterior, wherein the number array supplier has from the first to the Nth numerical sequences (N is an integer larger than
1) constituting a number array of n×
m (n and m are integers equal to or larger than
1), the image converter receives the Mth inputted image (Mε
{1, . . . , N}) of number array of n×
m, and receives the Mth inputted number array from the number array supplier, records the Mth conversion result generated by calculating the Mth inputted image and the Mth inputted number array in the image storage, and outputs the converted result from the image storage successively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 18, 19, 20)
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11. A screen information converter comprising:
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a display image input port for inputting a display image outputted for a display unit; a clock input terminal for inputting a clock for a display of a display image outputted to a display device; a number array supplier for maintaining a numerical sequence and outputting the numerical sequence; an image converter for converting the digital display image by calculating the digital display image data received from the screen image input terminal and the numerical sequence data from the number array supplier; an image storage for storing the image data converted and generated by the image converter and outputting the converted image data to the exterior; a clock converter for converting the frequency of an image display clock received from the clock input terminal and outputting the converted clock; a display image output terminal for outputting the image data outputted from the image storage to the exterior; and an output clock terminal for outputting the converted clock, wherein the number array supplier has from the first to the Nth numerical sequences (N is an integer larger than
1) constituting a number array of n×
m, and the image converter receives the Mth input image (Mε
{1, . . . , N}) which is a number array of n×
m (n and m are integers equal to or larger than
1), and receives the Mth numerical sequence from the number array supplier, calculates the Mth input image and the Mth numerical sequence and stores the conversion result of the generated Mth image in the image storage, the clock converter generates a conversion clock, from the input clock, with a frequency of M times higher (M is a rational number equal to or larger than
1) than that of the input clock received from the clock input terminal, and outputs the converted images from the image storage and the conversion clock from the clock output terminal one by one. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification