Information display device and information display method

• US 8,126,296 B2
• Filed: 07/10/2008
• Issued: 02/28/2012
• Est. Priority Date: 08/07/2007
• Status: Expired due to Fees

• Current Assignee: Hitachi-Omron Terminal Solutions Corporation (Hitachi, Ltd.)
• Original Assignee: Hitachi-Omron Terminal Solutions Corporation (Hitachi, Ltd.)
• Inventors: Watanabe, Takashi, Sako, Hiroshi, Nagayoshi, Hiroto, Uemura, Toshiro
• Primary Examiner(s): Kassa, Yosef
• Application Number:
  US12/216,736
• Publication Number:
  US 20090041380A1
• Time in Patent Office: 1,328 Days
• Field of Search: 382/277, 382/282, 382/303, 382/305, 382/307
• US Class Current: 382/307
• CPC Class Codes: G06F 21/84 output devices, e.g. displays or monitors
• CPC Class Codes: G06F 2221/032 Protect output to user by software means
• CPC Class Codes: G07F 19/20 Automatic teller machines [ATMs]
• CPC Class Codes: G07F 19/201 Accessories of ATMs
• CPC Class Codes: G09G 2300/023 Display panel composed of stacked panels
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/06 Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation
• CPC Class Codes: G09G 2340/0414 Vertical resolution change
• CPC Class Codes: G09G 2340/0421 Horizontal resolution change
• CPC Class Codes: G09G 2358/00 Arrangements for display data security
• CPC Class Codes: G09G 3/2092 Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04

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.

Claims

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.

2. The screen image converter according to claim 1, wherein the screen image converter has a random number generator, and the number array supplier supplies a value equal to or larger than 0 to less than k/2 to the maximum gradation k of the digital input image data using the random number generator from the first to the (N−

1)th numerical sequences.

3. The screen image converter according to claim 1, wherein the number array supplier generates the Nth numerical sequence by calculating from the first to the (N−

1)th numerical sequences.

4. The screen image converter according to claim 3, wherein the image converter when denoting a value corresponding to the coordinates (i, j) of the input image by a_{i, j}(iε

{1, . . . , n}, jε

{1, . . . , m}), a numerical value corresponding to the coordinates (i, j) of the number array, by b_{i, j}, and a value corresponding to the coordinates (i, j) of the conversion result by a′

_{i, j}, calculates as a′

_{i, j}=a_{i, j}+b_{i, j} or a′

_{i, j}=a_{i, j} b_{i, j}.

5. The screen image converter according to claim 4, wherein the screen image converter has a random number generator, and the number array supplier generates from the first to the (N−

1)th numerical sequences using the random number generator, denoting a value corresponding to the coordinates (i, j) of the k-th numerical sequence by R_{k, i, j}(kε

{1, . . . , N}, iε

{1, . . . , n}, jε

{1, . . . , m}), calculates and supplies the Nth numerical sequence as R_{N, i, j}=−

(R_{1, i, j}+ . . . +R_{N-1, i, j}).

6. The screen image converter according to claim 3, wherein the screen image converter has the random number generator, the image converter when denoting a value corresponding to the coordinates (i, j) of the input image by a_{i, j}(iε

{1, . . . , n}, jε

{1, . . . , m}), a numerical value corresponding to the coordinates (i, j) of the number array by b_{i, j}, and a value corresponding to the coordinates (i, j) of the conversion result by a′

_{i, j}, calculates as a′

_{i, j}=a_i,j×

b_{i, j}, the number array supplier generates from the first to the (N−

1)th numerical sequences using the random number generator, and calculate and supplies the Nth numerical sequence as R_{N, j}=N(R_{1, j}+ . . . +R_{N-1, j}).

7. The screen image converter according to claim 5, wherein the screen image converter outputs a numerical sequence group from the image storage with a speed of 30 frames or more per second as a result of conversion.

8. The screen image converter according to claim 7, wherein the screen image converter has an image system converter and the image system converter generates a color system converted image of the input image from the first to the second color systems, the image converter receives the color system converted image and obtains the Mth converted image generated by calculation of the Mth input image and the Mth numerical sequence, the screen image converter records in the image storage the result of conversion of the converted image from the second to the first color systems.

9. The screen image converter according to claim 8, wherein the first color system is an RGB color system and the second color system is a CMY color system.

10. An automatic teller machine, a window terminal, or a display device equipped with the screen image converter according to claim 9.

18. The screen information converter according to claim 6, wherein the screen information converter has an image system converter and the image system converter converts the input image of the first color system to the second color system, the image converter generates the converted image using the converted image of the second color system, and the screen image converter converts the converted image from the second to the first color systems.

19. The screen information converter according to claim 18, wherein the number N of number arrays is 2.

20. The screen information converter according to claim 19, wherein the image system converter has a signal line for setting up operation or non-operation, and the image converter generates the setting up signal for operation or non-operation every conversion of one pixel of the input image, and controls the operation or non-operation of the image system converter.

11. A screen information converter comprising:

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.

12. The screen information converter according to claim 11, wherein assuming a gradation number of the pixels of the input image to k, and as the first to the (N−

1)th numerical sequences, the number array supplier generates arbitrarily an integer sequence with the integer larger than −

k and less than k, and denoting a numerical value corresponding to the coordinates (i, j) of the k-th numerical sequence by R_{k, i, j}(kε

{1, . . . , N}, iε

{1, . . . , n}, jε

{1, . . . , m}), calculates and generates with R_{N, i, j} as R_{N, i, j}=−

(R_{1, i, j}+ . . . +R_{N-1, i, j}), and the image converter when denoting a value corresponding to the coordinates (i, j) of the input image by a_{i, j}(iε

{1, . . . , n}, jε

{1, . . . , m}), a numerical value corresponding to the coordinates (i, j) of the number array, by b_{i, j}, and a value corresponding to the coordinates (i, j) of the conversion result by a′

_{i, j}, calculates as a′

_{i, j}=a_{i, j}+b_{i, j}.

13. The screen information converter according to claim 12, wherein the image generator when the result of addition of a pixel value of the input image and the numerical sequence is larger than the maximum gradation value k, sets the result of addition to k, and when the result of addition is less than 0 sets the result of addition to 0.

14. The screen information converter according to claim 13, wherein in the case where the value a′

_{i, j} of the coordinates (i, j) of the Mth converted image is larger than the maximum gradation value k, p is calculated as p=a′

_i,j and the value of p thus obtained is added to the (M+1)th converted images, and in the case where the value a′

_{i, j} is less than 0, p is calculated as p=a′

_{i, j} and the value of p thus obtained is subtracted from the (M+1)th converted images.

15. The screen information converter according to claim 14, wherein the clock converter assuming the frequency of an input clock is F [Hz], and A is an arbitrary integer equal to or larger than 30 and equal to or less than 1000, calculates the magnification M of the conversion clock as M=A/F.

16. The screen information converter according to claim 15, wherein the number array supplier is provided with a random number generator and the number array supplier generates from the first to the (N−

1)th numerical sequences using the random number generator.

17. The screen information converter according to claim 15, wherein the image generator generates the first converted image using the first numerical sequence and the first input image, and generates from the second to the N-th converted images using from the second to the Nth numerical sequences and the first input image, respectively.