Smoothing device for an image display

Claim 2

A smoothing device, which smooths a slanted line pattern by adding a pattern, comprising: a picture memory for storing pattern data representing a pattern to be displayed on a display device, said pattern being formed of picture elements formed by a first and a second field line scanning and having each four regions; data preservation means coupled to said picture memory for preserving said pattern data consisting of nine picture elements one of which is currently being scanned on said display device and the other eight of which are adjacent to this picture element; detection means responsive to said pattern data preserved by said data preservation means for detecting a slanted line pattern other than the patterns formed of said current display picture element or four picture elements having their sides contacting the sides of said current display picture element; selection means for selecting one of the four regions of said current display picture element, which has a specified positional relationship with said slanted line pattern; and display means for displaying said slanted line pattern and a pattern corresponding to the region selected by said selection means.

Claim 3

A smoothing device according to claim 1, characterized in that said detection means detects a slanted line pattern formed of two picture elements having mutual point contact, and said selection means selects the region of said four regions that corresponds in position to the point contact position of said two picture elements.

Claim 4

A smoothing device according to claim 1, characterized in that said detection means detects a first slanted line pattern formed of the two picture element having mutual point contact and a second slanted line pattern formed of the first and second picture elements having mutual point contact, and a third picture element having side contact with said first picture element and point contact with said current display picture element, and said selection means selects the region of said four regions, which corresponds to the position of point contact of the two picture elements forming the pattern of said first slanted line pattern, and selects the region of said four regions corresponding to the position of point contact between said current display picture element and said third picture element.

Claim 5

A smoothing device according to claim 1, characterized in that said pattern display means discriminates each of said four regions in response to a 1:1 duty clock which is the display timing reference clock.

Claim 6

A smoothing device, which smooths a slanted line pattern by adding a rattern, comprising: a picture memory for storing pattern data representing a pattern to be displayed on a display device, said pattern being formed of picture elements formed by a first and a second field line scanning and having each four regions; data preservation means coupled to said picture memory for preserving said pattern data consisting of nine picture elements one of which is currently being scanned on said display device and the other eight of which are adjacent to this picture element; detection means responsive to said pattern data preserved by said data preservation means for detecting a slanted line pattern formed of a current display picture element, a first picture element, which has side contact with said current display picture element, and a second picture element, which has point contact with an end of a second side of said current display picture element opposite a first side, which is in contact with said first picture element; and selection means for selecting one of the four regions of said current display picture element, which has a specified positional relationship with said slanted line pattern; and prevention means for preventing the display of a pattern corresponding to the region selected by said selection means.

Claim 7

A smoothing device, which smooths a slanted line pattern by adding a rattern, comprising: a picture memory for storing pattern data representing a pattern to be displayed on a display device, said pattern being formed of picture elements formed by a first and a second field line scanning and having each four regions; data preservation means coupled to said picture memory for preserving said pattern data consisting of nine picture elements one of which is currently being scanned on said display device and the other eight of which are adjacent to this picture element; detection means responsive to said pattern data preserved by said data preservation means for detecting a slanted line pattern formed of a current display picture element, a first picture element, which has side contact with said current display picture element, and a second picture element, which has point contact with an end of a second side of said current display picture element opposite a first side, which is in contact with said first picture element; and selection means for selecting one of the four regions of said current display picture element, which has a specified positional relationship with said slanted line pattern; and prevention means for preventing the display of a pattern corresponding to the region selected by said selection means.

Claim 8

A smoothing device, which smooths a slanted line pattern by adding a pattern, comprising: a picture memory for storing pattern data representing a pattern to be displayed on a display device, said pattern being formed of picture elements formed by a first and a second field line scanning and having each four regions; data preservation means coupled to said picture memory for preserving said pattern data consisting of nine picture elements one of which is currently being scanned on said display device and the other eight of which are adjacent to this picture element; detection means responsive to said pattern data preserved by said data preservation means for detecting a slanted line pattern other than the patterns formed of said current display picture element or four picture elements having their sides contacting the sides of said current display picture element; selection means for selecting one of the four regions of said current display picture element, which has a specified positional relationship with said slanted line pattern; and coloring means for coloring a pattern corresponding to the region selected by said selection means by color data of the slanted line pattern detected by said detection means.

Claim 9

A smoothing device, which smooths a slanted line pattern by adding a pattern, comprising: a picture memory for storing pattern data representing a pattern to be displayed on a display device, said pattern being formed of picture elements formed by a first and a second field line scanning and having each four regions; data preservation means coupled to said picture memory for preserving said pattern data consisting of nine picture elements one of which is currently being scanned on said display device and the other eight of which are adjacent to this picture element; detection means responsive to said pattern data preserved by said data preservation means for detecting a slanted line pattern other than the patterns formed of said current display picture element or four picture elements having their sides contacting the sides of said current display picture element; selection means for selecting one of the four regions of said current display picture element, which has a specified positional relationship with said slanted line pattern; and coloring means for coloring a pattern corresponding to the region selected by said selection means by color data of the slanted line pattern detected by said detection means.

Claim 10

A smoothing device according to claim 6, characterized in that said coloring means colors said pattern corresponding to the region selected by said divided region selection means based on the coloring data of the first picture element positioned after said current display picture element in the image scanning direction or a second picture element positioned before said current display picture element which is a structural element of the slanted line pattern detected by said detection means.