Method providing predetermined display quality of color images regardless of type of input image
View Patent ↗A method for displaying a color image is provided in which a predetermined display quality is secured regardless of a type of an input image, and display quality of an image having a linear edge is improved. The method comprises the steps of using a display device having a cell arrangement structure in which cells of each cell column in a display screen have the same light color, a light color of a cell column is different from that of the neighboring cell column, and a cell position in the column direction of a cell column is shifted from that of the neighboring cell column among a set of the cell columns each having the same light color, and lighting two neighboring cells in at least one cell column out of a set of cell columns each having the same light color when displaying a display line perpendicular to the column direction.
1. A method for displaying a color image by reproducing a pixel color of an input image using three types of cells having different light colors, that method comprising the steps of:
using a display device including a display screen having parallel cell columns, cells of each cell column having the same light color, a light color of a cell column being different from that of the neighboring cell column, a cell position in the column direction of a cell column being shifted from that of the neighboring cell column among a set of cell columns each having the same light color; and
lighting two neighboring cells in at least one cell column out of a set of cell columns each having the same light color when displaying a display line perpendicular to the column direction,
wherein, in a display line, one of:
a cell neighboring an original cell in a vertical direction is lighted for compensation in an upward adjacent or subjacent cell according to a predetermined scheme;
when the original cell is an upper shift cell, neighboring lower shift cells are lighted for compensation and when the original cell is a lower shift cell, neighboring upper shift cells are lighted for compensation; and
when the original cell is an upper shift cell, a neighboring lower shift cell is lighted for compensation and when the original cell is a lower shift cell, a neighboring upper shift cell is lighted for compensation.
2. The method according to claim 1 , wherein two neighboring cells are lighted in all the plural cell columns having the same light color corresponding to the display line.
3. The method according to claim 1 , wherein two neighboring cells are lighted in every other cell columns having the same light color, and one cell is lighted in the remaining cell columns.
4. The method according to claim 1 , wherein luminance of each cell is determined by distributing a luminance value of a pixel of the input image to two neighboring cells equally when lighting the two cells in the cell column.
5. The method according to claim 1 , wherein the display device is a plasma display panel.
6. The method according to claim 1 , wherein luminance of each cell is determined by distributing a luminance value of a pixel of the input image to two neighboring cells when lighting the two cells in the cell column.
7. The method according to claim 1 , wherein two neighboring cells are lighted in all the plural cell columns having the same light color corresponding to the display line when the input image is a non-interlace image.
8. The method according to claim 1 , wherein two neighboring cells are lighted in every other cell columns having the same light color, and one cell is lighted in the remaining cell columns when the input image is a non-interlace image.
9. A display device comprising:
a display device including a display screen having parallel cell columns, cells of each cell column having the same light color, a light color of a cell column being different from that of the neighboring cell column, a cell position in the column direction of a cell column being shifted from that of the neighboring cell column among a set of the cell columns each having the same light color; and
a driving circuit including a portion for deciding whether an input image is a non-interlace image or an interlace image and a portion for controlling a combination of cells having the same light color in accordance with a result of the decision with respect to the input image,
wherein, in a display line, one of:
a cell neighboring an original cell in a vertical direction is lighted for compensation in an upward adjacent or subjacent cell according to a predetermined scheme;
when the original cell is an upper shift cell, neighboring lower shift cells are lighted for compensation and when the original cell is a lower shift cell, neighboring upper shift cells are lighted for compensation; and
when the original cell is an upper shift cell, a neighboring lower shift cell is lighted for compensation and when the original cell is a lower shift cell, a neighboring upper shift cell is lighted for compensation.
10. A display device comprising:
a display device including a display screen having parallel cell columns, cells of each cell column having a same light color, a light color of a cell column being different from that of the neighboring cell column, a cell position in the column direction of a cell column being shifted from that of the neighboring cell column among a set of the cell columns each having the same light color; and
a driving circuit for lighting two neighboring cells in at least one cell column having the same light color when displaying a display line perpendicular to the column direction,
wherein, in a display line, one of:
a cell neighboring an original cell in a vertical direction is lighted for compensation in an upward adjacent or subjacent cell according to a predetermined scheme;
when the original cell is an upper shift cell, neighboring lower shift cells are lighted for compensation and when the original cell is a lower shift cell, neighboring upper shift cells are lighted for compensation; and
when the original cell is an upper shift cell, a neighboring lower shift cell is lighted for compensation and when the original cell is a lower shift cell, a neighboring upper shift cell is lighted for compensation.
11. A method for displaying a color image by reproducing a pixel color of an input image using three types of cells having different light colors, the method comprising:
using a display device including a display screen having parallel cell columns, cells of each cell column having a same light color, a light color of a cell column being different from that of the neighboring cell column, a cell position in a column direction of a cell column being shifted from that of the neighboring cell column among a set of cell columns each having the same light color; and
switching a combination of cells having the same light color constituting display line perpendicular to the column direction for each of a first field and a second field when the input image is displayed in an interlace format,
wherein
in the first field,
lighting two neighboring cells in at least one cell column out of a set of cell columns each having the same light color when displaying a display line perpendicular to the column direction, and
when the original cell is an upper shift cell, a neighboring lower shift cell is lighted for compensation and when the original cell is a lower shift cell, a neighboring upper shift cell is lighted for compensation, and
in the second field,
lighting the original cell when displaying a display line perpendicular to the column direction.