WO2006075695A1 - Character figure display, program, and recording medium - Google Patents

Abstract

A character figure display capable of displaying a smooth, thick character or figure on a display device which can display a character or a figure. The character figure display comprises a display device (103) and a control unit (102) for controlling the display device. Each pixel includes sub-pixels arrayed in a first direction. The control unit (102) controls the color elements corresponding to the sub-pixels independently to display a character or figure on the display device. The control unit (102) sets the color element levels of a second sub-pixel group adjacent to one sub-pixel of a skeleton sub-pixel group and including one or more sub-pixels arranged in a second direction perpendicular to the first direction according to the color element levels of one or more sub-pixels of a first sub-pixel group.

Description

 Character / graphic display device, program, and recording medium

 Technical field

 The present invention relates to a character graphic display device, a program, and a recording medium that include a display device that displays characters or graphics and a control unit that controls the display device. According to the present invention, for example, characters or graphics can be displayed smoothly and thickly on a display device capable of displaying characters or graphics in color.

 Background art

 [0002] Patent Document 1 discloses a technique for smoothly displaying characters. In this technology, dot fonts are used, and a halftone area (gray area) is arranged around the character color area.

 [0003] Patent Document 2 discloses a technique for displaying characters smoothly and with a wide line extending vertically. In this technique, the skeleton subpixel corresponding to the skeleton portion of the character is assigned to at least one of the plurality of subpixels. In addition, a group of subpixels is assigned adjacent to the skeleton subpixel. The subpixel group corresponds to a portion adjacent to the skeleton portion of the character and includes a plurality of subpixels. A plurality of subpixels included in the subpixel group are arranged in the horizontal direction. The color element level is set for the sub-pixel group, and by setting the luminance value according to the color element level to the sub-pixel group, the characters are displayed smoothly and the line width of the character extending in the vertical direction is widened. To do.

 Here, “sub-pixel” is a color element that constitutes a pixel, and “character skeleton” is the center of a stroke that constitutes a character. The “color element level” indicates the ratio of the luminance level of the character color to the luminance level of the background color. For example, the proportion of the background color that has a lower color element level is higher in subpixels farther from the skeleton subpixel. The closer the subpixel is to the skeleton subpixel, the higher the proportion of the character color with the higher color element level.

FIG. 23 shows a configuration of a character display device 600 disclosed in Patent Document 2.

[0006] The character display device 600 includes an input device 601, a control unit 602, and a display device 603. The control unit 602 includes a skeleton generation unit 604, a character contribution level assignment unit 605, an output value generation unit 606, a character contribution level calculation unit 607, and a character contribution level set calculation. It includes output means 608 and luminance level calculation means 609.

 A skeleton generation unit 604 extracts desired data from the bitmap data input by the input device 601 and generates skeleton data indicating the skeleton portion of the character in units of subpixels. Skeletal data is generated so that the skeleton sub-pixels are smoothly arranged according to the pixels adjacent to the skeleton portion of the character and the neighboring pixels in the skeleton portion of the character.

 [0008] Character contribution level assigning means 605 assigns color element levels (character contribution levels) to sub-pixels according to the distance from the skeleton.

 [0009] Character contribution level set calculation means 608 collects character contribution levels in units of pixels. Luminance level calculation means 609 calculates luminance table data representing luminance values to be assigned to subpixels.

 The output value generation unit 606 assigns a luminance value to a desired subpixel based on the color element level and the luminance table data.

 [0011] Thus, according to the character display device 600, the brightness level can be controlled in units of subpixels, so that the contrast is high and characters can be displayed smoothly.

 [0012] Patent Document 3 discloses a technique for displaying characters smoothly and with the width of a line extending in the vertical direction and the width of the line extending in the horizontal direction being thick. In this technology, in order to increase the width of the line extending in the horizontal direction, the color element of the subpixel adjacent to at least one of the upper and lower sides of the skeleton subpixel (color element level is 7 (maximum value)). Set the level to 3 (a value smaller than the color element level of the skeleton subpixel, for example, half of the color element level of the skeleton subpixel). Therefore, the characters can be displayed smoothly and the line width of the characters can be increased.

 Patent Document 1: JP-A-8-255254

 Patent Document 2: Japanese Patent Laid-Open No. 2003-248476

 Patent Document 3: Japanese Patent Application Laid-Open No. 2001-100725

 Disclosure of the invention

 Problems to be solved by the invention

[0013] However, with the technique disclosed in Patent Document 1, the outline of the character or the character itself is blurred or displayed, or the character with a biased blackness is displayed.

[0014] The technique disclosed in Patent Document 2 solves this problem of Patent Document 1. Character display device This is because 600 increases the width of the line extending in the vertical direction by controlling the luminance level in units of subpixels.

[0015] However, even using the technique disclosed in Patent Document 2, the width of a line such as a curve is not constant. This is because the width of the line extending in the horizontal direction cannot be increased. Therefore, a smooth curve cannot be generated. Furthermore, by simply controlling the luminance level in units of subpixels and increasing the width of the line extending in the vertical direction, the adjacent subpixels are connected, causing the characters to be crushed. Therefore, data indicating a sufficiently thick character cannot be generated, and a sufficiently thick character cannot be displayed.

 [0016] The technique disclosed in Patent Document 3 solves these problems of Patent Document 2. This is the power to display not only the width of the line extending in the vertical direction but also the width of the line extending in the horizontal direction.

 [0017] However, although the technique disclosed in Patent Document 3 is effective for displaying a straight line extending in the vertical direction, it is not easy to adapt to the display of the oblique line. The color element level of the subpixel adjacent to at least one of the upper side and the lower side of the skeleton subpixel is a force whose value depends only on the color element level of the skeleton subpixel. Furthermore, it is not easy to adapt to the display of a line with a bent stroke. This is because it cannot sufficiently cope with the change in the width of the line extending in the vertical direction.

[0018] The present invention has been made in view of the above problems, and displays a sufficiently thick character or figure without degrading the quality of the character or figure, and displays the width of the curved portion of the character or figure uniformly. An object of the present invention is to provide a character graphic display device, a program, and a recording medium.

 Means for solving the problem

The character graphic display device of the present invention is a character graphic display device comprising a display device having a plurality of pixels and a control unit for controlling the display device, wherein each of the plurality of pixels Each of the plurality of sub-pixels includes a plurality of sub-pixels arranged in one direction, and one corresponding color element among the plurality of color elements is assigned in advance, and each of the plurality of color elements The strength is represented by a plurality of color element levels, and the control unit converts the plurality of color elements corresponding to the plurality of sub-pixels. By independently controlling each character, a character or a graphic is displayed on the display device, and the control unit includes a skeleton sub including at least one subpixel corresponding to a skeleton portion of the character or the graphic displayed on the display device. A color element level of a pixel group and a first subpixel group adjacent to one of the skeleton subpixel groups, the first subpixel group including at least one subpixel arranged in the first direction A color element level of the pixel group, and the control unit is a second sub-pixel group adjacent to one sub-pixel of the skeleton sub-pixel group and is perpendicular to the first direction. The color element level of the second subpixel group including at least one subpixel arranged in two directions is set to at least one subpixel of the first subpixel group. Is set according to the color element level, thereby the objective described above being achieved.

[0020] The control unit includes: one sub-pixel force in the skeleton sub-pixel group, and one of the first sub-pixel groups according to a distance to one sub-pixel in the first sub-pixel group. The color element level of the one subpixel may be set.

 [0021] The control unit sets a color element level of the second sub-pixel group based on a first conversion rate, and the first conversion rate corresponds to a color element level of the first sub-pixel group. It is determined according to a plurality of line widths of the character or figure, and the relationship between the first conversion rate and the plurality of line widths of the character or figure may be represented by at least one table.

 [0022] A color element level of a third subpixel group adjacent to the first subpixel group and including at least one subpixel arranged in the second direction is the character or the figure. And the relationship between each of the plurality of line widths of the character or figure and the color element level of the third sub-pixel group is represented by at least one table. Moyo.

 [0023] The control unit sets the color element level of the third subpixel group including at least one subpixel arranged in the second direction to the color element level of the first subpixel group and the color element level of the second subpixel group. It may be set based on at least one of the color element levels.

[0024] The brightness of the second subpixel group corresponding to the color element level of the second subpixel group. The degree value is determined according to a plurality of line widths of the character or figure, and the relationship between each of the plurality of line widths of the character or figure and the luminance value of the second sub-pixel group is little. Both may be represented by a single table.

[0025] The control unit may set a color element level of the second sub-pixel group based on correction suppression data indicating whether or not the character or the figure is corrected and suppressed.

[0026] The correction suppression data may be included in bitmap data representing the characters or graphics.

 [0027] The correction suppression data may have a level value.

 The recording medium of the present invention is a recording medium that can be read by an information display device, and the information display device includes a display device having a plurality of pixels and a control unit that controls the display device. Each of the plurality of pixels includes a plurality of subpixels arranged in a first direction, and each of the plurality of subpixels is assigned in advance one color element corresponding to a plurality of color elements. The strength of each of the plurality of color elements is represented by a plurality of color element levels, and the recording medium independently controls the plurality of color elements corresponding to the plurality of sub-pixels. A program for causing the control unit to execute a process including a step of displaying characters or figures on the display device is recorded, and the characters or figures are displayed in the table. Displaying on the display device comprises: a color element level of a skeleton subpixel group including at least one subpixel corresponding to a skeleton portion of a character or a graphic displayed on the display device; and one of the skeleton subpixel groups. Setting a color element level of a first subpixel group adjacent to one subpixel, the first subpixel group including at least one subpixel arranged in the first direction; and the skeleton subpixel group A second subpixel group adjacent to one of the subpixels, and including at least one subpixel arranged in a second direction perpendicular to the first direction. And setting a level according to a color element level of at least one subpixel of the first subpixel group. Thus, the above object is achieved.

[0029] A program of the present invention is a program for causing an information display device including a display device having a plurality of pixels and a control unit to control the display device to execute display processing. Each of the plurality of pixels includes a plurality of sub-pixels arranged in a first direction, and each of the plurality of sub-pixels is assigned with a corresponding one of the plurality of color elements in advance. The strength of each of the plurality of color elements is represented by a plurality of color element levels, and the display process independently controls the plurality of color elements corresponding to the plurality of sub-pixels. A step of displaying a character or a graphic on the display device, and the step of displaying the character or the graphic on the display device corresponds to a skeleton part of the character or the graphic displayed on the display device. A color element level of a group of skeleton subpixels including at least one subpixel, and a level adjacent to one of the skeleton subpixels Setting a color element level of the first sub-pixel group including at least one sub-pixel arranged in the first direction, and one sub-pixel of the skeleton sub-pixel group A color element level of a second subpixel group including at least one subpixel arranged in a second direction perpendicular to the first direction. And setting according to the color element level of at least one of the sub-pixels, thereby achieving the above object.

 The invention's effect

 [0030] According to the character graphic display device, program and recording medium of the present invention, the color element level of the second sub-pixel group is set according to the color element level of at least one sub-pixel of the first sub-pixel group. Is done. Therefore, the color element level of the second subpixel group can be changed in conjunction with the change of the color element level of the first subpixel group. As a result, the line width of the character or figure can be changed uniformly, and the character or figure can be displayed smoothly.

 [0031] According to the character graphic display device, program, and recording medium of the present invention, the width of the line of the character or graphic that is independent of the arrangement direction of the plurality of subpixels included in each of the plurality of pixels is uniformly thick. it can.

[0032] Further, according to the character graphic display device, program, and recording medium of the present invention, it is possible to prevent the lines of characters from being crushed. As a result, it is possible to display characters that are sufficiently thick and high-definition and easier to read than conventional techniques. Brief Description of Drawings

 FIG. 1 is a diagram showing a configuration of a character display device 100 according to an embodiment of the present invention.

 FIG. 2 is a diagram showing the function of the skeleton generation means 104.

 FIG. 3 is a diagram showing the function of a character contribution level assigning means 105.

 FIG. 4 is a diagram showing the function of output value generation means 106.

 FIG. 5 is a diagram showing the function of a character contribution level calculation means 107.

 FIG. 6 is a diagram showing the function of the character contribution level set calculation means 108.

 FIG. 7 is a diagram showing the function of luminance level calculation means 109.

 FIG. 8 is a diagram showing the function of vertical character contribution level set calculation means 110.

 FIG. 9 is a diagram showing a relationship between a character contribution level set, a vertical character contribution level set, a two-dimensional character contribution level set, a character contribution level, and a luminance value.

 FIG. 10 shows a character image generated by the character display device 100.

 FIG. 11 is a diagram showing a configuration of another character display device 200 according to the embodiment of the present invention.

 FIG. 12 is a diagram showing the function of table selection means 212.

 FIG. 13 is a diagram showing a configuration of still another character display device 300 according to the embodiment of the present invention.

 FIG. 14 is a diagram showing the function of luminance table selection means 314.

 FIG. 15 is a diagram showing the occurrence of contact between lines.

 FIG. 16 is a diagram showing a configuration of still another character display device 400 according to the embodiment of the present invention.

 FIG. 17 is a diagram showing the function of correction suppression means 416.

 FIG. 18 is a diagram showing a configuration of still another character display device 500 according to the embodiment of the present invention.

 FIG. 19 is a diagram showing the function of correction suppression means 516.

 FIG. 20 is a diagram showing a display result of a portion of “odd” (a portion close to a portion “large” and a portion “possible”) in which the occurrence of contact between the lines is suppressed by the correction suppressing means 516.

 FIG. 21 is a diagram showing bitmap data including correction suppression data.

 FIG. 22 is a flowchart showing a character display processing procedure according to the embodiment of the present invention.

 FIG. 23 is a diagram showing a configuration of a character display device 600 disclosed in Patent Document 2.

 Explanation of symbols

[0034] 100-character display device 101 input devices

 102 Control unit

 103 display denois

 104 Framework generation means

 105 Character contribution level assignment means

 106 Output value generation means

 107 Character contribution level calculation means

 108 Character contribution level set calculation means

 109 Luminance level calculation means

 110 Vertical character contribution level set calculation means

 111 Two-dimensional character contribution level set synthesis means

 BEST MODE FOR CARRYING OUT THE INVENTION

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

 [0036] 1. Text display

 FIG. 1 shows a configuration of a character display device 100 according to an embodiment of the present invention.

 [0037] Character display device 100 may be, for example, a personal computer. As the personal computer, any type of computer such as a desktop type or a laptop type may be used. Alternatively, the character display device 100 may be a word processor.

 [0038] The character display device 100 may be any information display device such as an electronic device or an information device provided with a display device. For example, the character display device 100 is an electronic device equipped with a liquid crystal display device, a portable information terminal as a portable information tool, a mobile phone including a PHS, a communication device such as a general phone ZFAX, a game machine, a TV, or a PDA. There may be.

 The character display device 100 includes an input device 101, a display device 103 that displays a plurality of characters, and a control unit 102 that controls the display device 103.

The input device 101 is used to input character information representing characters displayed on the display device 103 and instructions to the display device 103 to the control unit 102. The character information includes, for example, a character code for identifying a character and a bitmap for representing a bitmap font. Data, line width information indicating the width of the character line, character color information indicating the character color, and background color information indicating the background color.

 [0041] As the input device 101, any type of input device capable of inputting character information can be used. An input device such as a keyboard with cursor keys, numeric keys, and function keys can be used as the input device 101.

 Note that the character information is not limited to being input to the control unit 102 by using the input device 101. The character information may be stored in a recording medium (not shown) included in the control unit 102.

 [0043] Any recording medium may be used as a recording medium for storing character information. Recording media such as hard disk, ROM, MO, MD, DVD, IC card, optical card, etc. can be used. The ROM can be, for example, a mask ROM, EPROM, EEPROM, flash ROM, etc. When a ROM is used, various processing innovations can be easily realized simply by exchanging the ROM. For example, the ROM can be used when the character display device 100 is a portable terminal device or a mobile phone.

 [0044] In the case where the character display device 100 includes means for connecting to a communication line including the Internet, the communication line power character information can be downloaded.

 The control unit 102 displays characters on the display device 103 by independently controlling a plurality of color elements corresponding to a plurality of subpixels.

The control unit 102 converts the bitmap data into character display data. The character display data is data representing characters to be displayed on the display device 103. The control unit 102 includes a skeleton generation unit 104, a character contribution level assignment unit 105, an output value generation unit 106, a character contribution level calculation unit ₁₀₇ , a character contribution level set calculation unit _108, and a luminance level calculation unit 109. , A vertical character contribution level set calculating unit 110 and a two-dimensional character contribution level set combining unit 111.

The skeleton generation unit 104 generates skeleton data from the bitmap data input by the input device 101. The character contribution level assigning means 105 assigns a value (character contribution level) indicating how much the character color contributes to the background color to each sub-pixel. [0048] Line width information is input to the character contribution level calculation means 107 by the input device 101. The character contribution level calculation means 107 calculates the character contribution level of a predetermined subpixel according to the distance from the skeleton subpixel based on the line width information. The character contribution level set calculation means 108 calculates a character contribution level set for each pixel.

 [0049] The vertical character contribution level set calculation means 110 calculates a character contribution level set of a plurality of subpixels arranged in the vertical direction based on the character contribution level set of the pixels adjacent to the skeleton subpixel and the line width information. calculate. The skeleton subpixel is a subpixel corresponding to the skeleton portion of the character. The two-dimensional character contribution level set combining means 111 combines the character contribution level set and the vertical character contribution level set to generate a two-dimensional character contribution level set.

 [0050] Luminance level calculation means 109 calculates the luminance levels of a plurality of subpixels constituting a character to be displayed on display device 103 based on the character color information, background color information, and two-dimensional character contribution level set. calculate.

The output value generation means 106 generates a value (character display data) to be output to the display device 103 based on the character contribution level and the luminance level. The generated output value is output to the display device 103.

[0052] Details of the "character contribution level", "character contribution level set", "vertical character contribution level set", and "two-dimensional character contribution level set" will be described later. Further, the details of the functions of each component included in the control unit 102 will be described later.

[0053] Display device 103 includes a display region having a plurality of pixels. The display device 103 displays a desired character in the display area based on the character display data output from the control unit 102.

 [0054] As the display device 103, any display device having a function of displaying characters can be used. The display device 103 is, for example, a liquid crystal display device.

[0055] Each of the plurality of pixels is divided into a plurality of sub-pixels. Each of the plurality of sub-pixels is assigned in advance one corresponding color element among a plurality of color elements (for example, R (red), G (green), B (blue)). The strength of each of the multiple color elements is represented by multiple color element levels. [0056] The shape of the sub-pixel is a vertically long strip formed by dividing a pixel into three. In this case, these sub-pixels are arranged in the horizontal direction. Note that the shape of the subpixel is not limited to a vertically long strip. The shape of the subpixel may be a horizontally long strip shape. In this case, these subpixels are arranged in the vertical direction. Subpixels are not limited to being created by dividing a pixel into three. The number of pixel divisions may be arbitrary.

 [0057] Details of the character contribution level will be described below.

 [0058] The character contribution level is expressed by a hexadecimal number (0 force and values up to F). For example, the character contribution level of the skeleton subpixel is represented by “F”, and the character contribution level of a subpixel sufficiently away from the skeleton subpixel is represented by “0”. The character contribution level of sub-pixels close to the skeleton sub-pixel is expressed by! / Of “0” to “F” or a deviation. For example, the character contribution level of the desired subpixel is represented by a value that is so small that the desired subpixel is away from the skeleton subpixel force.

 When the character color is black and the background color is white, the character contribution level of the skeleton subpixel is represented by “F”, and the luminance value of the skeleton subpixel is “0”. Skeletal sub-pixel power The character contribution level of a sufficiently distant sub-pixel is represented by “0”, and the luminance value of that sub-pixel is “255”. The character contribution level of the sub-pixels close to the skeleton sub-pixel is expressed by! / Of the “0” to “F”, and the luminance value of the sub-pixel is “255” to “0”. Is the corresponding one value.

 Note that the character contribution level is not limited to being expressed in hexadecimal. The character contribution level can be expressed in arbitrary radix.

 [0061] Details of the character contribution level set will be described below.

 [0062] The character contribution level set is a set of character contribution levels of a plurality of subpixels. For example, if the number of subpixels is three and each of the three subpixels is assigned one corresponding color element out of three color elements (for example, R, G, B) The character contribution level set is the character contribution level of the subpixel of color element R, the character contribution level of the subpixel of color element G, and the character contribution level of the subpixel of color element B.

[0063] When the character color is black and the background color is white, for example, three corresponding to the black portion The set of character contribution levels of subpixels is represented by (F, F, F), and its pixel values are (R, G, B) = (0, 0, 0). For example, the character contribution level set of three subpixels corresponding to the white part is represented by (0, 0, 0), and its pixel value is (R, G, B) = (255, 255, 255).

 [0064] If the character contribution level set of three subpixels adjacent to the right side of the skeleton subpixel is (R, G, B) = (3, 6, 9), the pixel value is R≥G≥B (For example, pixel values (R, G, B) = (230, 202, 168)).

 [0065] The character color and the background color are different from each other by three subpixels having pixel values satisfying R≥G≥B (for example, pixel values (R, G, B) = (230, 202, 168)). Different red colors! , But the character contribution level set of three subpixels adjacent to the left side of the skeleton subpixel is set to (R, G, B) = (9, 6, 3), and the pixel value is set to R By setting pixel values that satisfy ≤G≤B (for example, (R, G, B) = (168, 202, 230)), coloring of characters can be suppressed.

 [0066] Note that the character contribution level set is only a set of character contribution levels of three subpixels constituting one pixel. The number of subpixels to which the character contribution level included in the character contribution level set is assigned is an arbitrary number of 1 or more.

 The details of the function of each component included in the control unit 102 will be described below.

 FIG. 2 shows the function of the skeleton generation means 104.

 [0069] The skeleton generation means 104 takes out the desired data of bitmap data, and generates skeleton data in units of subpixels. Skeletal data is generated so that the skeleton subpixels are smoothly arranged according to the pixels adjacent to the skeleton portion of the character and the neighboring pixels in the skeleton portion of the character.

 [0070] Bitmap data is stored in, for example, a font storage unit included in the character display device 100. The skeleton generation unit 104 refers to a pixel adjacent to the skeleton subpixel and a pixel adjacent to the skeleton subpixel for each pixel of the bitmap data acquired from the font storage unit, thereby determining a subpixel to which the skeleton data is assigned. Ask.

[0071] For example, a skeleton subpixel included in a predetermined pixel (pixel in the i-th row and j-th column) of bitmap data refers to the predetermined pixel and eight pixels adjacent to the predetermined pixel. Asking It is. Predetermined pixel pattern and these 8 pixels (i + 1st row and j 1st column pixel, i + 1st row and jth column pixel, i + 1st row and j + 1st column pixel, i row and j 1st column pixel, i row and j + 1 column pixel, i 1 row and j 1 column pixel, i 1 row and j column pixel, i 1 row Skeleton subpixels are assigned to subpixels to which color element B is assigned among predetermined pixels with reference to the pattern of the eye and the pixel in the j + 1st column).

 [0072] For example, the sub-pixel to which the skeleton sub-pixel is assigned is determined by a combination of a predetermined pixel pattern and a pattern of eight pixels adjacent to the predetermined pixel. A combination of these patterns is stored in advance in the skeleton generation means 104.

 [0073] The skeleton generation means 104 performs pattern matching on all the pixels indicated by the bitmap data, assigns the corresponding skeleton data, and the pattern power skeleton pattern of a predetermined pixel (see FIG. 2 (c)). Is generated.

 FIG. 3 shows the function of the character contribution level assigning means 105.

 [0075] The character contribution level is represented by a hexadecimal number (a value from 0 to F). The character contribution level of the skeletal subpixel is expressed by “F”, and the character contribution level of the subpixel corresponding to the portion separated by the skeleton subpixel force N subpixel is expressed by “0”. The character contribution level of the sub-pixel adjacent to the skeleton sub-pixel is expressed by V of “0” to “F”, or the shift.

 [0076] The character contribution level of the sub-pixel of color element B among the pixels in the i-th row and j-th column is “F”, and the sub-pixel of color element G in the pixels of the i-th row and j-th column The character contribution level is “9”, and the character contribution level of the sub-pixel of color element R out of the pixels in the i-th row and the j-th row is “6”, i-th row and j-th column The character contribution level of the sub-pixel of color element B among the pixels of “3” is “3”.

 [0077] The character contribution level of the sub-pixel of the color element R in the pixel in the i-th row and j + 1st column is “9”, and the color element in the pixel in the i-th row and j + 1st column The character contribution level of the G sub-pixel is “6”, and the character contribution level of the sub-pixel of the color element B out of the pixels in the i-th row and j + 1st column is “3”.

[0078] The character contribution levels of the subpixels are assigned symmetrically about the skeleton subpixel. However, with the skeleton subpixel as the center, the subpixel A character contribution level may be assigned. Furthermore, the character contribution level of the subpixel is “

It is not limited to “9”, “6”, “3”.

[0079] In this way, the character contribution level assigning means 105 is configured so that the character contribution level of the desired subpixel is represented by a value that is so small that the desired subpixel is separated from the skeleton subpixel force. Assign the character contribution level of the subpixel (see Fig. 3 (c)).

 FIG. 4 shows the function of the output value generation means 106.

 [0081] The output value generation means 106 has a luminance value table corresponding to a character contribution level set of one pixel. The output value generation means 106 selects a luminance value table corresponding to the character contribution level set, and generates character display data based on the selected luminance value table.

 [0082] When the character contribution level set of the pixel in the i-th row and the j-th column is (6, 9, F), “2” in the luminance value table included in the output value generation means 106 is selected. (See Fig. 4 (b)), and character display data is generated based on the selected brightness value table.

 [0083] The data processing for each character has been described above. As described above, the skeleton generation unit 104, the character contribution level assignment unit 105, and the output value generation unit 106 perform data processing on all the pixels constituting the character, thereby displaying the character.

 Hereinafter, generation of a luminance value table included in the output value generation unit 106 will be described.

 FIG. 5 shows the function of the character contribution level calculation means 107.

 The character contribution level calculation means 107 sets the character contribution level of this predetermined subpixel according to the distance to the skeleton subpixel force predetermined subpixel.

 [0087] The character contribution level calculation means 107 corresponds to each of a plurality of thickness levels (line width information) indicating the width of the character line, from the character contribution level of the skeleton subpixel, from the skeleton subpixel. Character contribution level for subpixels that are separated by pixels, character contribution level for subpixels that are 2 subpixels away from skeleton subpixels, character contribution levels for subpixels that are 3 subpixels away from skeleton subpixels, and 4 subpixels away from skeleton subpixels The character contribution level of the subpixel is calculated.

[0088] When the thickness level is “i”, the skeleton subpixel force is 4 subpixels apart. The character contribution level of the subpixel up to the pixel is “F”, “9”, “6”, “3”, “0”, and when the thickness level is “i + 1”, the skeleton subpixel The character contribution levels of sub-pixels up to sub-pixels that are 4 sub-pixels apart are “F”, “A”, “7”, “4”, and “0”. Note that the character contribution level power of subpixels from the skeleton subpixel to the subpixels 4 subpixels apart is not necessarily different. Some of these character contribution levels may be the same character contribution level. All can be "F". For example, the character contribution level of subpixels from the skeleton subpixel to subpixels that are 4 subpixels apart is “F”, “9”, “9”, “3”, “0” or “F”, It can be “F”, “F”, “F”, “0”.

[0089] The thickness level and the character contribution level of the plurality of subpixels are calculated in advance, and the character contribution level table that represents the relationship between the thickness level and the character contribution level of the plurality of subpixels is used to calculate the character contribution level. It may be stored in the means 107. In this case, the character contribution level calculation means ₁₀₇ selects a character contribution level according to the thickness level.

 [0090] The character contribution level of the sub-pixel varies depending on the thickness level. The character contribution level corresponding to thickness level i is compared with the character contribution level corresponding to thickness level i + 1. The character contribution level of the skeleton subpixel is the same. Furthermore, the character contribution levels 4 subpixels away from the skeleton subpixel are the same. However, the character contribution levels of subpixels 1 to 3 subpixels apart from the character contribution levels corresponding to the thickness level i are "9", "6", and "3". The character contribution levels corresponding to level i + 1 are “A”, “7”, and “4”. The character contribution level corresponding to the thickness level i + 1 is close to the character contribution level F of the skeleton subpixel larger than the character contribution level corresponding to the thickness level i. This means that the luminance level calculation means 109 assigns a near V ヽ value as a luminance value to a character color for a predetermined pixel.

 Hereinafter, the description will be continued assuming that the character contribution level calculation unit 107 selects the character contribution level corresponding to the thickness level i.

 FIG. 6 shows the function of the character contribution level set calculation means 108.

The character contribution level set calculation means 108 calculates a character contribution level set by referring to the character contribution levels of a predetermined number of subpixels. The number of subpixels referred to depends on, for example, the character contribution level calculated by the character contribution level calculation means 107. Exist. The sub-pixel force adjacent to the skeleton sub-pixel is also included in the character-contribution level set of the target pixel up to the sub-pixel immediately before the sub-pixel whose sub-pixel character contribution level is the minimum value (= 0). . Therefore, the number of subpixels referenced is defined by << Equation 1 >> shown below.

 <Formula 1>

 Number of sub-pixels to be referenced = (number of sub-pixels included in one pixel) + (sub-pixel one sub-pixel next to the sub-pixel with the lowest character contribution level from the sub-pixel adjacent to the skeleton sub-pixel Number of subpixels up to pixel) X 2

 In the embodiment of the present invention, the subpixels to which the character contribution level other than 0 is assigned by the character contribution level calculation means 107 are subpixels that are 3 subpixels away from the skeleton subpixel. Therefore, a set of arbitrary character contribution levels is calculated based on the skeleton data of 9 subpixels (9 = 3 + 3 X 2) (3 pixels).

[0094] Since the combination of the skeletons of adjacent N subpixels is represented by ^2N , 2 ⁹ = 512 tables are prepared.

 FIG. 7 shows the function of the brightness level calculation means 109.

 The brightness level calculation means 109 is based on the character contribution level set (for example, the 2D character contribution level set synthesized by the 2D character contribution level set synthesis means 111) input to the brightness level calculation means 109. Further, the luminance values of the sub-pixels of the color element R, the color element G, and the sub-pixel of the color element B are determined for each pixel in consideration of the character color, the background color, and the pixel arrangement.

 [0097] As described above, the character contribution level represents the mixing ratio of the character color and the background color. Therefore, the actual luminance value is calculated by performing weighted average processing on the character color information and the background color information according to the character contribution level.

 The actual luminance level of the subpixel depends on the characteristics of the character display device 100. Below, Equation 2 to Equation 4 are used to calculate the actual luminance level of the subpixel.

 <Formula 2>

 Vr = iGr ((Gr (fr) X ar + Gr (br) X (15-ar)) / 15)

<Formula 3> Vg = iGg ((Gg (fg) X ag + Gb (bg) X (15-ag)) / 15)

 <Formula 4>

 Vb = iGb ((Gb (fb) X ab + Gg (bb) X (15-ab)) / 15)

 Here, Vr indicates the luminance level of the sub-pixel of color element R, Vg indicates the luminance level of the sub-pixel of color element G, and Vb indicates the luminance level of the sub-pixel of color element B.

[0099] Gr (x) represents the input / output characteristics of the character display device 100 with respect to the sub-pixel of the color element R, and Gg (x) represents the input-output characteristics of the character display device 100 with respect to the sub-pixel of the color element G. (x) shows the input / output characteristics of the character display device 100 for the sub-pixel of color element B. iGr (x) indicates the input / output characteristics of the character display device 100 for the sub-pixel of the color element R, iGg (x) indicates the input-output characteristics of the character display device 100 for the sub-pixel of the color element G, and iGb (x) Indicates the input / output characteristics of the character display device 100 for the sub-pixel of color element B.

 [0100] fr indicates the luminance level of the sub-pixel of the color element R necessary for expressing the character color, fg indicates the luminance level of the sub-pixel of the color element G required for expressing the character color, and fb Indicates the luminance level of the sub-pixel of color element B necessary for expressing the character color. br indicates the luminance level of the sub-pixel of the color element R necessary for expressing the background color, bg indicates the luminance level of the sub-pixel of the color element G required for expressing the background color, and bb indicates the background color Indicates the luminance level of the sub-pixel of color element B required to express.

 [0101] ar indicates the character contribution level of the sub-pixel of color element R, ag indicates the character contribution level of the sub-pixel of color element G, and ab indicates the character contribution level of the sub-pixel of color element B

[0102] FIG. 7 (c) shows the luminance levels corresponding to the character contribution level set. For each of the character contribution levels (003), (036), (9F9), (FFF), the brightness levels (255, 255, 230), (255, 230, 202), (168, 0, 168), One brightness level corresponding to (0, 0, 0) is determined.

[0103] These luminance levels are obtained by converting the character contribution level set shown in Fig. 7 (a) into display device input / output characteristic conversion, weighted average of character color and background color, and display input / output characteristic inverse conversion. Calculated. [0104] The input / output characteristics γ = 2.2 of the character display device 100, the display characteristics conversion formula corresponding to the text color black and the background color white are shown in << Equation 5 >>.

 << Formula 5 >>

Gr (x) = 255X (x / 255) ^{2 2}

 For the applied force S, Gr (O) = 0, Gr (255) = 255.

[0105] If the text color is black and the background color is white, the term containing fr, fg, and fb is 0. In this case, the luminance level of the sub-pixel is expressed by Equation 6 to Equation 8.

 << Formula 6 >>

Vr = 255X (((255X (15-ar)) / 15) / 255) ⁽ 1/22 ⁾

 << Formula 7 >>

Vg = 255X (((255X (15—ag)) / 15) / 255) ^{(1/2 2)}

 << Formula 8 >>

Vb = 255X (((255Χ ( 15-ab)) / 15) / 255) (1/2 · 2)

 By substituting the subpixel character contribution level (0, 3, 6) (see the second row of the table in Fig. 7 (a)) into << Equation 6 >> to << Equation 8 >>, as shown below, The brightness level of the pixel is calculated.

[0106] Vr = 255X (((255X (15-0)) / 15) / 255) ^(1/2 ' ²⁾ = 255 X 1 ^(1/2 ' ²⁾ = 255

Vg = 255X (((255X (15-3)) / 15) / 255) ^{u / 2} = 255XO.8 ^(1/2 = 230

Vb = 255X (((255X (15-6)) / 15) / 255) ^{(1/2 2)} = 255ΧΟ.6 ^{(1/2 2)} = 202 Actually, the input / output characteristics of the display device are Often non-linear. If the input / output characteristics of the display device are non-linear, the input / output characteristics and inverse characteristics are calculated in advance and stored in a table.

 FIG. 8 shows the function of the vertical character contribution level set calculation unit 110.

 [0108] Vertical character contribution level set calculation means 110 calculates a character contribution level set of subpixels arranged in a direction perpendicular to the arrangement direction of the subpixels. For example, the vertical character contribution level set depends on the distance of the skeleton subpixel force.

The vertical character contribution level set calculation means 110 uniformly converts the character contribution level set to the vertical character contribution level set without being based on the thickness level. For example, vertical characters Contribution level set calculating means _{1 10,} by the character contributes level set in IZ3, converts character contribution level set in the vertical character contribution level set (see FIG. 8 (a)).

 [0110] Further, the vertical character contribution level set calculation means 110 may convert the character contribution level set into a vertical character contribution level set based on the thickness level (see FIG. 8B).

 [0111] When the thickness level is “i + 3”, the character contribution levels up to subpixels that are 4 subpixels away from the skeleton subpixel force are “F”, “d”, “8”, “5” "," 0 ". In this case, the character contribution level set is converted to a vertical character contribution level set by setting the character contribution level set to 1Z2.

 [0112] When the thickness level is “i”, the character contribution level up to the sub-pixel that is 4 sub-pixels away from the skeleton sub-pixel force is “F”, “9”, “6”, “3”, “0”. In this case, the character contribution level set is converted to a vertical character contribution level set by setting the character contribution level set to 1Z3 (see Fig. 8 (b)).

 [0113] When the thickness level is “i-2”, the character contribution level up to the sub-pixel that is 4 sub-pixels away from the skeleton sub-pixel force is “F”, “7”, “5”, “1” "," 0 ". In this case, the character contribution level set is converted to a vertical character contribution level set by setting the character contribution level set to 1Z4.

 [0114] As described above, the character contribution level of the predetermined subpixel group (second subpixel group) is the subpixel group (the first subpixel group) from the subpixel adjacent to the skeleton subpixel to the subpixel separated by 3 subpixels. It is set based on the character contribution level of the (subpixel group). Here, the predetermined subpixel group (second subpixel group) is a subpixel group adjacent to the skeleton subpixel group, and the predetermined subpixel group includes at least one subpixel arranged in the vertical direction. including.

 Furthermore, as described with reference to FIG. 8 (b), the character contribution level of the second sub-pixel group can be set based on a predetermined conversion rate. This predetermined conversion rate is determined according to the line width information. As described above, the relationship between the predetermined conversion rate and the line width information can be represented by at least one table.

[0116] In the example shown in Fig. 8 (a) and Fig. 8 (b), the character contribution level set (0, 0, 0) is converted into the vertical character contribution level set (0, 0, 0) The contribution level set (F, F, F) is a vertical sentence Converted to character contribution level set (5, 5, 5).

FIG. 9 shows the relationship between the character contribution level set, the vertical character contribution level set, the two-dimensional character contribution level set, the character contribution level, and the luminance value.

With reference to FIG. 9, a method of calculating a luminance value by the two-dimensional character contribution level set combining unit 111 and the luminance level calculating unit 109 will be described.

[0119] Figure 9 (a) shows the relationship between the character contribution level set, the vertical character contribution level set, and the two-dimensional character contribution level set. The character contribution level set combination is placed in the first column, and the vertical character contribution level set combination is placed in the first row.

[0120] The two-dimensional character contribution level set combining unit 111 generates a two-dimensional character contribution level set by selecting a larger value from the character contribution level set and the vertical character contribution level set.

 [0121] The two-dimensional character contribution level set composing means 111 is configured such that A, a, B if character contribution level set (A, B, C) and vertical character contribution level set (a, b, c) are used. And b, C and c are compared. If A> a, B <b, C> c, the 2D character contribution level set is (A, b, C). In the case of character contribution level set (0, 0, 3) and vertical character contribution level set (0, 1, 2), the two-dimensional character contribution level set is (0, 1, 3).

 [0122] The two-dimensional character contribution level set combining unit 111 sets a two-dimensional character contribution level set based on the character contribution level and the vertical character contribution level set. As described above, the character contribution level of the predetermined sub-pixel group (third sub-pixel group) is set based on the character contribution level of the first sub-pixel group and the character contribution level of the second sub-pixel group. The Here, the predetermined subpixel group (third subpixel group) is a subpixel group adjacent to the first subpixel group, and the predetermined subpixel group includes at least one subpixel arranged in the vertical direction. Including. The first sub-pixel group is a sub-pixel group from a sub-pixel adjacent to the skeleton sub-pixel to a sub-pixel separated by 3 sub-pixels, and the second sub-pixel group is a sub-pixel group adjacent to the skeleton sub-pixel, The second subpixel group includes at least one subpixel arranged in a direction perpendicular to the skeleton subpixel.

[0123] It should be noted that character display is performed appropriately (for example, in the embodiment of the present invention, characters are configured. If priority is given to high-speed data processing rather than making the vertical thickness and horizontal thickness of the line segment to be visually the same), the character contribution level of the third subpixel group is Based on one of the character contribution level of the first subpixel group and the character contribution level of the second subpixel group, it may be set according to a predetermined rule set in advance. When priority is given to appropriately displaying characters over performing data processing at a high speed, the character contribution level of the third sub-pixel group is the first as described in the embodiment of the present invention. It is set based on the character contribution level of the sub-pixel group and the character contribution level of the second sub-pixel group.

 [0124] Fig. 9 (b) shows the relationship between the character contribution levels of the sub-pixels of each color element and the corresponding luminance values. The text color is black and the background color is white. Based on the method described with reference to FIG. 7 and Equations 6 to 8, the character contribution levels of the sub-pixels of each color element and the corresponding luminance values are calculated.

 [0125] Fig. 9 (c) shows a two-dimensional luminance table. The 2D luminance table shows the relationship between the character contribution level set, the vertical character contribution level set, and the 2D luminance value. Based on the two-dimensional character contribution level set shown in Fig. 9 (a) and the luminance value shown in Fig. 9 (b), the two-dimensional luminance value is calculated. The two-dimensional luminance value is a luminance value corresponding to the two-dimensional character contribution level set.

 FIG. 10 shows a character image generated by the character display device 100.

 Luminance level calculation means 109 calculates a two-dimensional luminance value table indicating the relationship between the character contribution level set, the vertical character contribution level set, and the two-dimensional luminance value, and outputs it to output value generation means 106.

[0128] The character contribution level set (3, 6, 9) of the pixel in the k + 1st row and jth column and the character contribution level set ( ₀ , ₀ , 0) of the pixel in the kth row and jth column are output value generation means 106 is input.

 [0129] The output value generation means 106 refers to the two-dimensional luminance value table (see Fig. 10 (b)) and sets the character contribution level set (3, 6, 9) of the pixel in the k + 1st row and jth column and k Based on the character contribution level set (0, 0, 0) of the pixel in the row j column, select the corresponding luminance value (value in the first row, second column) from the two-dimensional luminance values, and k The pixel value of the pixel in the row j column is determined.

[0130] A character image is generated (see 010 (c)). [0131] The character display device of the present invention has been described with reference to FIGS.

For example, in the embodiment shown in FIGS. 1 to 10, the display device 103 corresponds to “a display device having a plurality of pixels”, and the control unit 102 corresponds to “a control unit that controls the display device”. Each component included in the control unit 102 corresponds to a means for displaying characters on a display device by independently controlling a plurality of color elements corresponding to a plurality of sub-pixels. 104 and the character contribution level assigning means 105 are “the color element level of the skeleton subpixel group including at least one subpixel corresponding to the skeleton portion of the character displayed on the display device, and one of the skeleton subpixel group”. To set the color element level of the first subpixel group adjacent to one subpixel and including at least one subpixel arranged in the first direction. Correspondingly, output value generation means 106, character contribution level calculation means 107, character contribution level set calculation means 1 08, luminance level calculation means 109, vertical character contribution level set calculation means 110, and two-dimensional character contribution level set synthesis means 111 Is a second subpixel group adjacent to one subpixel of the skeletal subpixel group and includes at least one subpixel arranged in a second direction perpendicular to the first direction. The color element level of the pixel group is set according to the color element level of at least one sub-pixel of the first sub-pixel group.

 However, the embodiments shown in FIGS. 1 to 10 merely show an example of the functions of the character display device of the present invention. As long as the functions of the respective means described above are achieved, a character display device having an arbitrary configuration can be included in the scope of the present invention.

 [0134] For example, the "first direction" is the X-axis direction. When the first direction is the X-axis direction, the first subpixel group is adjacent to one subpixel of the skeleton subpixel group in the X-axis direction. When the first direction is the X-axis direction, the “second direction” is the y-axis direction, and the second subpixel group is one of the skeleton subpixel groups, and the y-axis direction is Adjacent.

Note that the “first direction” is not limited to the X-axis direction. For example, the “first direction” is the y-axis direction. When the first direction is the y-axis direction, the first subpixel group is adjacent to one subpixel of the skeleton subpixel group in the y-axis direction. First direction is y-axis In the case of the orientation, the “second direction” is the X-axis direction, and the second sub-pixel group is adjacent to one sub-pixel of the skeleton sub-pixel group in the X-axis direction.

[0136] Further, for example, each means described above may be realized by hardware, software, or hardware and software.

 [0137] For example, the character display device stores a program for executing a character display processing procedure (hereinafter referred to as a character display processing program). The character display processing program may be stored in advance in a program storage means included in the character display device when the computer is shipped.

 [0138] Alternatively, the character display processing program may be stored in the program storage means after the computer is shipped. For example, a user may download a specific website website character display processing program for a fee or free of charge, and install the downloaded program on the computer. When the character display processing program is recorded on a computer-readable recording medium such as a flexible disk, CD-ROM, or DVD-ROM, the character display processing program is input using an input device (for example, a disk drive device). May be installed on the computer. The installed program is stored in the program storage means.

 [0139] Details of the character display processing procedure will be described later.

 [0140] As described with reference to FIGS. 1 to 10, according to the character display device of the present invention, the color element level of the second sub-pixel group is at least one sub-pixel of the first sub-pixel group. It is set according to the color element level. Therefore, the color element level of the second subpixel group can be changed in conjunction with the change of the color element level of the first subpixel group. As a result, the width of the character lines can be changed uniformly, and the characters can be displayed smoothly.

 [0141] According to the character display device of the present invention, it is possible to uniformly increase the width of the character line without depending on the arrangement direction of the plurality of sub-pixels included in each of the plurality of pixels.

 FIG. 11 shows a configuration of another character display device 200 according to the embodiment of the present invention.

In FIG. 11, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted. FIG. 12 shows the function of the table selection means 212.

[0145] Hereinafter, the character display device 200 will be described with reference to FIG. 11 and FIG.

Character display device 200 includes table selection means 212. Based on the line width information, the table selection means 212 selects a two-dimensional character contribution level set table corresponding to the line width information from a plurality of two-dimensional character contribution level set tables. The plurality of two-dimensional character donation level set tables are stored in a storage medium (not shown) included in the character display device 200, for example. For example, the storage medium stores a two-dimensional character contribution level set table A, a two-dimensional character contribution level set table B, and a two-dimensional character contribution level set table C. 2D character contribution level set table A is line width information (F9 630), 2D character contribution level set table B is line width information (FA740), and 2D character contribution level set table C is line width information. Corresponds to (FB850).

[0147] Each of the plurality of two-dimensional character contribution level set tables indicates the relationship among the character contribution level set, the vertical character contribution level set, and the two-dimensional character contribution level set. For example, in each of a plurality of two-dimensional character contribution level set tables, a combination of character contribution level sets is arranged in the first column, and a combination of vertical character contribution level sets is arranged in the first row. The selection means 212 is a substitute for the character contribution level calculation means 107, the character contribution level set calculation means 108, the vertical character contribution level set calculation means 110, and the two-dimensional character contribution level set synthesis means 111 included in the character display device 100. 1 roll (see Figure 1).

 [0148] As described with reference to Figs. 11 and 12, the two-dimensional character contribution level set is determined according to a plurality of line widths of the character. At least one 2D character contribution level set table represents the relationship between the 2D character contribution level set and the line widths of the characters. According to the character display device 200, a control unit for calculating a two-dimensional character contribution level set by preparing a plurality of two-dimensional character contribution level set tables corresponding to a predetermined finite line width in advance. The number of operations can be reduced. As a result, the load on the control unit can be reduced.

 FIG. 13 shows a configuration of still another character display device 300 according to the embodiment of the present invention.

[0150] In Fig. 13, the same components as those shown in Fig. 1 are designated by the same reference numerals. A description thereof will be omitted.

 FIG. 14 shows the function of the brightness table selection means 314.

 Hereinafter, the character display device 300 will be described with reference to FIG. 13 and FIG.

 Character display device 300 includes brightness table selection means 314. In accordance with the line width information, character color information, and background color information, the luminance table selection means 314 is a two-dimensional corresponding to the line width information, character color information, and background color information from a plurality of two-dimensional luminance tables. Select the brightness table. The plurality of two-dimensional luminance tables are stored in a storage medium including, for example, 300 character display devices. For example, the storage medium stores a two-dimensional luminance table A, a two-dimensional luminance table B, and a two-dimensional luminance table C. The two-dimensional luminance table A corresponds to line width information (F9630), character color information is black (0, 0, 0), and background color information is white (255, 255, 255). The two-dimensional luminance table B corresponds to line width information (FA740), character color information black (0, 0, 0), and background color information white (255, 255, 255). The 2D luminance table C corresponds to line width information (FB850), character color information black (0, 0, 0), and background color information white (255, 255, 255).

 [0154] Luminance table selection means 314 includes character contribution level calculation means 107, character contribution level set calculation means 108, luminance level calculation means 109, vertical character contribution level set calculation means 110, and two-dimensional included in character display device 100. Used as a substitute for the character contribution level set combining means 111 (see FIG. 1).

 [0155] As described with reference to Figs. 13 and 14, the two-dimensional luminance value is determined in accordance with a plurality of line widths of characters. It represents the relationship between at least one 2D brightness table force 2D brightness value and multiple line widths of characters. According to the character display device 300, by preparing in advance a plurality of two-dimensional luminance tables corresponding to predetermined finite types of line widths, character colors, and background colors, control for calculating a two-dimensional luminance value is performed. Can reduce the number of operations of the part. As a result, the load on the control unit can be reduced.

 FIG. 15 shows the occurrence of contact between lines.

 [0157] Hereinafter, the occurrence of contact between lines will be described with reference to FIG.

 [0158] The character "Odd" is displayed on the character display device in the following procedure.

[0159] Bitmap data input by the input device by the skeleton generation means (Fig. 15 (a)) Generate skeleton data from Next, the character contribution level assigning means assigns the character contribution level to each color element (Fig. 15 (b)). Next, the luminance level calculation means calculates luminance values of a plurality of subpixels constituting the character displayed on the display device based on the character color information, the background color information, and the two-dimensional character contribution level set (see FIG. 15 (c)). Next, the output value generation means generates character display data based on the character contribution level and the luminance value. The characters indicated by the character display data are displayed on the display device (Fig. 15 (d)).

 [0160] Among the characters "odd" shown in the bitmap data, the part "large" and the part "possible" are separated

 (See the pixel in the m-th row and the n-th column in Fig. 15 (a)). However, of the characters “odd” displayed on the display device, the part “large” and the part “possible” appear to touch each other (the mth and nth columns in FIG. 15 (d)). Pixel reference).

 FIG. 16 shows a configuration of still another character display device 400 according to the embodiment of the present invention.

 In FIG. 16, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

 FIG. 17 shows the function of the correction suppression means 416.

 Hereinafter, an embodiment for suppressing the occurrence of contact between lines will be described with reference to FIG. 16 and FIG.

 Character display device 400 includes correction suppression means 416. The correction suppression unit 416 suppresses the contact between the lines based on the first correction suppression data.

 [0166] The first correction suppression data is allocated to a plurality of rows of the bitmap, and indicates whether or not correction suppression is performed for the allocated rows.

 When correction suppression is performed on a predetermined row, the value of the first correction suppression data corresponding to the predetermined row is “1”. When correction suppression is not performed for a predetermined row, the value of the first correction suppression data assigned to the predetermined row is “0”. The correction suppression means 416 changes the vertical character contribution level of the target pixel from (F, F, F) to (0, 0, 0) when the input power value of the first correction control data is “l”. Change to

[0168] For example, each of the values of the first correction suppression data corresponding to the m-th line, the m-th line, and the m + 1-th line of the bitmap indicating "odd" is "0", "1", " 0 ”. Therefore, multiple pixels in the m-th row are subject to correction suppression, and the vertical character contribution level of the pixels in the m-th row and the n-th column The set is (0, 0, 0). As a result, based on the vertical character contribution level set (0, 0, 0) and the character contribution level set (0, 0, 0), a luminance value (two-dimensional luminance value) surrounded by a solid line circle is selected.

 As described above with reference to FIGS. 16 and 17, the correction suppression unit 416 suppresses contact between lines based on the first correction suppression data.

FIG. 18 shows a configuration of still another character display device 500 according to the embodiment of the present invention.

In FIG. 18, the same components as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

FIG. 19 shows the function of the correction suppression means 516.

 Hereinafter, another embodiment for suppressing the occurrence of contact between lines will be described with reference to FIG. 18 and FIG.

Character display device 500 includes correction suppression means 516. The correction suppression means 516 receives the second correction suppression data. The correction suppression means 516 suppresses contact between lines.

The vertical character contribution level set calculating means 110 is controlled based on the second correction suppression data.

 The vertical character contribution level set calculation unit 110 generates a vertical character contribution level set based on the second correction suppression data and the character contribution level set.

 [0176] The suppression level of the second correction suppression data indicates a conversion rate for converting a character contribution level set to a vertical character contribution level set. For example, when the suppression level is “0”, the conversion rate is 1Z3. When the suppression level force is “l”, the conversion rate is 1Z5. When the suppression level is “3”, the conversion rate is 1Z16 (see Figure 19).

 The correction suppression means 516 receives the second correction suppression data whose suppression level is “0”.

 The correction suppression unit 516 controls the vertical character contribution level set calculation unit 110 based on the second correction suppression data. The vertical character contribution level set calculation unit 110 multiplies the character contribution level set (0, 3, 6) by 1Z3 to generate a vertical character contribution level set (0, 1, 2).

[0178] When the second correction suppression data whose suppression level is "3" is input to the correction suppression means 516, the character contribution level set is multiplied by 1Z16, so all the vertical character contribution level sets are ( 0, 0, 0). Therefore, the 2D luminance value is the vertical character contribution level set. The character contribution level set is generated depending only on the character contribution level set.

 [0179] The set of vertical character contribution levels generated based on the second correction suppression data with the suppression level "1" was generated based on the second correction suppression data with the suppression level "0". It is smaller than the vertical character contribution level set. Therefore, the 2D luminance value is closer to the background color.

 FIG. 20 shows the display result of the part of “odd” (the part close to “part” “large” and part “possible”) in which the occurrence of contact between the lines is suppressed by the correction suppression means 516. Show.

 [0181] The partial force surrounded by a circle in the display part (the right figure in Fig. 20) is gently converted. As described above, according to the character display device 500, it is possible to suppress the occurrence of contact between lines without degrading the quality of the characters.

 [0182] As described above with reference to FIGS. 18 to 20, the correction suppression unit 516 contributes to the vertical character based on the second correction suppression data so as to suppress contact between lines. Controls level set calculation means 110.

 Note that the character display device 500 generates a vertical character contribution level set based on the second correction suppression data in order to generate a two-dimensional character contribution level set table or a two-dimensional brightness table. However, by preparing in advance a plurality of two-dimensional character contribution level set tables corresponding to a predetermined finite type of line width, the number of operations of the control unit for calculating the two-dimensional character contribution level set can be reduced. Can be reduced. As a result, the load on the control unit can be reduced. In addition, by preparing multiple 2D luminance tables corresponding to predetermined finite types of line widths, character colors, and background colors, the number of operations of the control unit for calculating 2D luminance values is reduced. it can. As a result, the load on the control unit can be reduced

FIG. 21 shows bitmap data including correction suppression data.

With reference to FIG. 21, the bitmap data including the correction suppression data will be described.

In general, bitmap data is stored in the bitmap storage means. The stored bitmap data includes a plurality of byte data, and is data corresponding to each line of characters composed of a plurality of lines. Therefore, the data area corresponding to the rightmost part of the character is blank. The first correction suppression data or the second correction suppression data is assigned to this blank area. Hit it. As a result, it is possible to make the correction suppression means function without preparing a special data area for assigning the first correction suppression data or the second correction suppression data.

 [0187] As described with reference to Figs. 15 to 21, according to the character display device of the present invention, it is possible to prevent the lines of characters from being crushed. As a result, it is possible to display characters that are sufficiently thick and high-definition and easier to read than conventional techniques.

 [0188] The character display device of the present invention has been described above with reference to FIGS.

 [0189] 2. Character display ^ method

 FIG. 22 shows a character display processing procedure according to the embodiment of the present invention.

 [0190] By executing the character display processing procedure according to the embodiment of the present invention, a plurality of color elements corresponding to a plurality of subpixels are independently controlled, and characters are displayed on the display device. The character display processing procedure consists of a 2D luminance table generation procedure (Step 1 to Step 6), a character generation procedure (Step 7 to Step 10) for generating characters according to the generated 2D luminance table, and a generated character. And display procedure (step 11).

 [0191] Hereinafter, the character display processing procedure will be described step by step with reference to FIG. 1 and FIG.

Step 1: Line width information is input from the input device 101 to the control unit 102.

Step 2: The character contribution level calculation means 107 corresponds to the character contribution level of the skeleton subpixel, the character contribution level of the subpixel one subpixel away from the skeleton subpixel, and the skeleton subpixel corresponding to the line width information. The character contribution level of subpixels 2 subpixels away, the character contribution level of subpixels 3 subpixels away from the skeleton subpixel, and the character contribution level of subpixels 4 subpixels away from the skeleton subpixel are calculated.

 Step 3: The character contribution level set calculation means 108 calculates a character contribution level set by referring to the character contribution levels of the nine subpixels. The nine subpixels are a subpixel adjacent to the skeleton subpixel and a subpixel adjacent to the skeleton subpixel.

[0195] Step 4: The vertical character contribution level set calculation means 110 performs processing for the character contribution level set. A vertical character contribution level set of subpixels arranged in a direction perpendicular to the corresponding subpixel arrangement direction is calculated.

 Step 5: The two-dimensional character contribution level set combining unit 111 selects a large value from the character contribution level set and the vertical character contribution level set, and combines the two-dimensional character contribution level set.

 [0197] Step 6: The luminance level calculation means 109 further considers the character color, background color and pixel arrangement based on the two-dimensional character contribution level set, and for each pixel, the sub-pixel and color of the color element R Determine the luminance value of the subpixel of element G and the subpixel of color element B, and create a 2D luminance table.

[0198] After creating the two-dimensional luminance table, the process proceeds to Step 10.

Step 7: Bitmap data indicating a desired character is input from the input device 101 to the control unit 102.

 [0200] Step 8: The skeleton generation means 104 generates skeleton data in units of sub-pixels as well as bitmap data power.

 [0201] Step 9: The character contribution level assigning means 105 determines that the desired subpixel character contribution level is expressed by a value that is smaller and smaller as the desired subpixel is separated from the skeleton subpixel force. Assign sub-pixel character contribution level.

 [0202] By executing Step 8 and Step 9, the skeleton generation means 104 and the character contribution level assignment means 105 perform the character contribution level of the skeleton subpixel group and the character contribution level of the first subpixel group. Set.

 Step 10: The output value generation means 106 selects a luminance value table corresponding to the character contribution level set, and generates character display data based on the selected luminance value table. The output value generation means 106 outputs the character display data to the display device 103.

 [0204] By executing Step 1 to Step 6 and Step 10, the character contribution level of the second subpixel group is set according to the color element level of at least one subpixel of the first subpixel group.

 Step 11: Characters are displayed on the display device 103 based on the character display data.

[0206] After the characters are displayed on the display device 103, the processing ends. [0207] The character display processing procedure according to the embodiment of the present invention has been described above with reference to FIG.

[0208] For example, in the embodiment shown in FIG. 22, Steps 1 to L1 are “displaying characters on a display device by independently controlling a plurality of color elements corresponding to a plurality of subpixels”. Step 8 and Step 9 correspond to `` the color element level of the skeleton subpixel group including at least one subpixel corresponding to the skeleton portion of the character displayed on the display device, and the skeleton subpixel group ''. And a step of setting a color element level of a first subpixel group adjacent to one subpixel of the first subpixel group and including at least one subpixel arranged in the first direction. Steps 1 to 6 and Step 10 are “a second subpixel group adjacent to one subpixel of the skeleton subpixel group, which is perpendicular to the first direction. Corresponding to the step of setting the color element level of the second sub-pixel group including at least one sub-pixel arranged in two directions according to the color element level of at least one sub-pixel of the first sub-pixel group. .

 [0209] However, the character display processing procedure according to the embodiment of the present invention is not limited to the procedure shown in FIG. Each step force included in the character display processing procedure As long as it has the function of each of the steps described above, it can have an arbitrary procedure.

 [0210] According to the character display processing program of the present invention, the color element level of the second subpixel group is set according to the color element level of at least one subpixel of the first subpixel group. Therefore, the color element level of the second subpixel group can be changed in conjunction with the change of the color element level of the first subpixel group. As a result, the width of the character lines can be changed uniformly, and the characters can be displayed smoothly.

 [0211] According to the character display processing program of the present invention, it is possible to uniformly increase the width of a character line without depending on the arrangement direction of a plurality of subpixels included in each of a plurality of pixels.

[0212] Further, according to the character display processing program of the present invention, it is possible to prevent the character lines from being crushed. As a result, high-definition and easy-to-read characters that are sufficiently thick compared to conventional techniques can be displayed.

[0213] The present invention displays a character thicker than the character indicated by the bitmap data, and displays the character. The purpose is to display characters with smooth strokes and uniform stroke width.

 [0214] Specifically, bitmap data skeleton data is extracted. It is checked whether or not the target pixel has a skeleton portion in a pixel adjacent to the target pixel. If there is a skeleton part, the character contribution level corresponding to the distance of the skeleton part force is assigned to the target pixel. The character contribution level in the two-dimensional direction is observed with respect to the character contribution level assigned to the target pixel, and the optimum pixel value is obtained by referring to the character color information and background color information.

 [0215] In the above-described embodiment, an example in which characters are displayed on a display device has been described. However, the present invention is not limited to this. The present invention can be applied to a case where a graphic is displayed instead of or in place of a character.

 [0216] In this case, a graphic display program is used instead of the character display processing program or in addition to the character display processing program, and graphic information is used instead of the character information or in addition to the character information. The graphic contribution level may be used instead of the character contribution level or in addition to the character contribution level. The graphic display processing program may also include the same steps as the character display processing program. The figure includes, for example, a part of a character, a pattern, a symbol, and the like.

[0217] As described above, the power of the present invention exemplified by the preferred embodiment of the present invention. The present invention should not be construed as being limited to this embodiment. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range based on the description of the present invention and the common general technical knowledge from the description of specific preferred embodiments of the present invention. Patents, patent applications, and literature references cited in this specification should be incorporated by reference as if the contents themselves were specifically described in the present specification. Is understood.

 Industrial applicability

The present invention relates to a character graphic display device, a program, and a recording medium that can display characters or graphics smoothly and thickly on a display device capable of displaying characters or graphics in color. To do.

 [0219] According to the character graphic display device, program and recording medium of the present invention, the color element level of the second subpixel group is set according to the color element level of at least one subpixel of the first subpixel group. Is done. Therefore, the color element level of the second subpixel group can be changed in conjunction with the change of the color element level of the first subpixel group. As a result, the line width of the character or figure can be changed uniformly, and the character or figure can be displayed smoothly.

 [0220] According to the character graphic display device, program, and recording medium of the present invention, the width of the line of the character or graphic that is independent of the arrangement direction of the plurality of subpixels included in each of the plurality of pixels is uniformly thick. it can.

 [0221] Furthermore, according to the character graphic display device, program, and recording medium of the present invention, it is possible to prevent the lines of characters from being crushed. As a result, it is possible to display characters or figures that are sufficiently thick and easy to read compared to conventional techniques.

Claims

The scope of the claims

 [1] A character graphic display device comprising a display device having a plurality of pixels and a control unit for controlling the display device,

 Each of the plurality of pixels includes a plurality of sub-pixels arranged in a first direction, and each of the plurality of sub-pixels is pre-allocated with a corresponding one of a plurality of color elements. ,

 The strength of each of the plurality of color elements is represented by a plurality of color element levels, and the control unit controls each of the plurality of color elements corresponding to the plurality of sub-pixels independently. A character or a graphic is displayed on the display device, and the control unit includes a color element level of a skeleton subpixel group including at least one subpixel corresponding to a skeleton portion of the character or the graphic displayed on the display device; The first subpixel group adjacent to one subpixel of the skeleton subpixel group, and the color element level of the first subpixel group including at least one subpixel arranged in the first direction is set. And

 The control unit is a second subpixel group adjacent to one subpixel of the skeleton subpixel group, and includes at least one subpixel arranged in a second direction perpendicular to the first direction. A character graphic display device that sets a color element level of a second sub-pixel group including the second sub-pixel group according to a color element level of at least one sub-pixel of the first sub-pixel group.

 [2] The control unit includes: one subpixel force of the skeleton subpixel group, and one of the first subpixel groups according to a distance to one subpixel of the first subpixel group. 2. The character graphic display device according to claim 1, wherein a color element level of the one subpixel is set.

 [3] The control unit sets a color element level of the second sub-pixel group based on a first conversion rate,

 The first conversion rate is determined according to a plurality of line widths of the character or figure corresponding to the color element level of the first sub-pixel group,

The relationship between the first conversion rate and the line widths of the characters or figures is at least one The character graphic display device according to claim 1, which is represented by a table.

[4] A color element level of a third subpixel group adjacent to the first subpixel group and including at least one subpixel arranged in the second direction is the character or the figure Are determined according to multiple line widths,

 2. The character graphic display device according to claim 1, wherein the relationship between each of the plurality of line widths of the character or graphic and the color element level of the third sub-pixel group is represented by at least one table.

 [5] The control unit sets the color element level of the third subpixel group including at least one subpixel arranged in the second direction to the color element level of the first subpixel group and the color element level of the second subpixel group. The character graphic display device according to claim 1, wherein the character graphic display device is set based on at least one of the color element levels.

 [6] The brightness value of the second subpixel group corresponding to the color element level of the second subpixel group is determined according to a plurality of line widths of the character or the figure,

 2. The character graphic display device according to claim 1, wherein the relationship between each of the plurality of line widths of the character or graphic and the luminance value of the second sub-pixel group is represented by at least one table.

 [7] The character according to claim 1, wherein the control unit sets a color element level of the second sub-pixel group based on correction suppression data indicating whether or not the character or the figure is corrected and suppressed. Graphic display device.

 8. The character graphic display device according to claim 7, wherein the correction suppression data is included in bitmap data representing the character or graphic.

9. The character graphic display device according to claim 7, wherein the correction suppression data has a level value.

[10] A recording medium readable by an information display device,

 The information display device includes a display device having a plurality of pixels, and a control unit that controls the display device,

Each of the plurality of pixels includes a plurality of sub-pixels arranged in a first direction, and each of the plurality of sub-pixels includes a corresponding one of a plurality of color elements. The element is pre-assigned,

 The strength of each of the plurality of color elements is represented by a plurality of color element levels, and the recording medium is

 A program for causing the control unit to execute a process including a step of displaying a character or a graphic on the display device by independently controlling the plurality of color elements corresponding to the plurality of subpixels. Recording,

 The step of displaying the character or the graphic on the display device includes:

 A color element level of a skeleton subpixel group including at least one subpixel corresponding to a skeleton portion of a character or a graphic displayed on the display device, and a first adjacent to one subpixel of the skeleton subpixel group. Setting a color element level of a first sub-pixel group including at least one sub-pixel grouped in the first direction.

 A second subpixel group adjacent to one of the skeleton subpixel groups, the second subpixel including at least one subpixel arranged in a second direction perpendicular to the first direction; Setting a color element level of a group according to a color element level of at least one subpixel of the first subpixel group;

 Including a recording medium.

 A program for causing an information display device including a display device having a plurality of pixels and a control unit to control the display device to execute display processing,

 Each of the plurality of pixels includes a plurality of sub-pixels arranged in a first direction, and each of the plurality of sub-pixels is pre-allocated with a corresponding one of a plurality of color elements. ,

 The strength of each of the plurality of color elements is represented by a plurality of color element levels, and the display process

 A step of displaying a character or a graphic on the display device by independently controlling the plurality of color elements corresponding to the plurality of sub-pixels; and a step of displaying the character or the graphic on the display device Is

At least one corresponding to the skeleton part of the character or figure displayed on the display device A color element level of a skeleton subpixel group including one subpixel, and a first subpixel group adjacent to one subpixel of the skeleton subpixel group, wherein the subpixel group is arranged in the first direction. Setting a color element level of a first sub-pixel group including pixels;

 A second subpixel group adjacent to one of the skeleton subpixel groups, the second subpixel including at least one subpixel arranged in a second direction perpendicular to the first direction; Setting a color element level of a group according to a color element level of at least one subpixel of the first subpixel group;

 Including the program.