JPH11305738A - Device and method for generating display data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To generate display device with which jag-free video can be obtained. SOLUTION: An input means 10 sends a function x=F(Y), a start point Ys , and an end point Ye to a comparing means 14 through a memory 12, sends x=F(Y) and Ys to an arithmetic means 16 when Ys <Yc to obtain an original coordinate value Xs , sends Ys and xs to an arithmetic means 18 and a subtracting means 20 to generate display data of subpixels of RGB(red, green, and blue) of coordinate values (XS, YS) of pixels, and then send the generated display data to a memory 24. The comparing means 22 decides and sends XS-YS from the means 20 to a control means 30. The control means 30 performs different processes according to whether it is larger than onesubpixel width and smaller than two-subpixel width, or larger than the two-subpixel width and accumulates the result in an address value based upon the coordinate value of the subpixel of R, or R and G of the coordinate value of the right adjacent pixel of (XS, YS). This process is repeated up to the final line Ye , and data regarding respective lines are stored in the memory 24 and then read out to display their video on a liquid crystal display 28.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for generating display data, and more particularly to an apparatus and a method for generating display data such as characters and graphics displayed on a display device.

[0002]

2. Description of the Related Art Spatial mixing involves mixing two-dimensional fine display images on the retina. In order to obtain a full color by this, there is color mixing by addition and subtraction. The former is color CR
T display or color TV, the latter is color photography,
You can see a typical example in printing. In addition, a mosaic of three primary colors R (red), G (green), and B (blue) is used. In subtraction, C (cyan), M (magenta), and Y are used.
A mixed color image is obtained by viewing the mosaic of three colors (yellow) apart from each other.

The combination of such fine RGB dots is called a pixel, and the fine dots are called sub-pixels. Generally, CRT (Cathode Ray Tu
FIG. 13 and FIG. 14 show the relationship between pixels and sub-pixels in be) and LCD (Liquid Crystal Display).

In a CRT, one pixel is 2 for each of RGB.
R, G
And B electron beams select the R, G and B sub-pixels. On the LCD, one pixel is one for each RGB.
Sub-pixels. Each of the sub-pixels has electrodes arranged orthogonally, and each of these electrodes can be addressed by horizontal and vertical drivers. Note that unlike CRT
The pitch of the LCD pixels is approximately equal to the size of the pixels as shown in FIG.

Conventionally, when displaying a character of a bitmap font, a font (character type and size) and a color have been designated by a keyboard or the like. More specifically, the font is stored in the storage device in the form of characters in pixel units, the font of the specified character is read from the storage device, and the pixels of the read font are displayed in the specified color.

Further, when a graphic such as a straight line, a circle or a rectangle is displayed by a drawing command or the like, the type, size, color, etc. of the graphic to be drawn are designated by a command using a keyboard or the like. More specifically, the coordinate position of the pixel of the specified command is obtained by calculation, and the obtained pixel is displayed in the specified color.

When displaying a locus drawn by a pointing device, the coordinate position of a locus of, for example, a figure drawn by the pointing device is designated thereby, and the color of the locus drawn by a keyboard or the like is specified. More specifically, the pixel closest to the coordinate position of the specified trajectory is obtained in pixel units, and the obtained pixel is displayed in the specified color.

[0008]

However, in a display in which the pixel size is equal to the pixel pitch, when the pixel pitch is large, the display method described above, as shown in FIG. 15, FIG. 16 and FIG. There was a problem that the diagonal lines became jagged (jaggy).

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display data generation apparatus and a display data generation method capable of solving the above-mentioned drawbacks of the prior art and reducing jaggies by addressing according to the configuration of sub-pixels.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is configured to be arranged two-dimensionally in the X (horizontal) direction and the Y (vertical) direction and to be arranged two-dimensionally. In a device for generating display data which is displayed on a display of a display device in which each of the processed pixels is composed of first, second and third sub-pixels having different colors, a predetermined function x = F (Y) and receives the vertical coordinate value element Y _e starting vertical coordinate values Y _s and the end point of the function, received by comparing the coordinate values Y _s and the coordinate values Y _e, coordinate values Y _s coordinate values in the comparison If Y _e is large, the display data generation process is terminated. If Y _e is small, the first comparison means for outputting the received function x = F (Y) and the coordinate value Y _s , and the first comparison means receiving a function x = F (Y) and the coordinate values Y _s from the Y of the received F (Y) was originally displayed in Y _s are substituted line Y _s Obtains the coordinate values x _s lateral had,
Receiving coordinate values Y _s and first calculating means for outputting coordinate values x _s thus determined coordinate values Y _s and the coordinate values from the first arithmetic means
Receiving x _s , the received coordinate value x _s is rounded down to the nearest whole number, the coordinate value x _s is converted to an integral coordinate value X _s , and the received coordinate value Y _s and the calculated coordinate value X are obtained. intersection and the corresponding two-dimensionally coordinate values of pixels arranged in _s (X _s, Y _s) and a second arithmetic means for forming a first, display data of the second and third sub-pixels, the the first is formed by the second computing means, a coordinate value of the display data pixel of the second and third sub-pixels (X _s, Y _s) first, the coordinate values of the second and third subpixel pull a storage means for storing an address value based, coordinate values X _s from the coordinate values x _s output from the first calculating means is outputted from the second arithmetic means x _s -X _s
Subtraction means for determining the value of x and x _s -X _s determined by the subtraction means
Is smaller than the width of one sub-pixel of the sub-pixel, and if the width is larger than one sub-pixel in the determination, the width is larger than the width of one sub-pixel of the sub-pixel and the width of two sub-pixels A second comparing means for determining whether or not x is smaller than the second comparing means, and a controlling means connected to the second comparing means for controlling the storage means. _If the value of _s- X _s is smaller than the width of one sub-pixel, the display value of the first, second and third sub-pixels stored in the storage means is stored in the address value. And if it indicates that the width is larger than the width of one subpixel and smaller than the width of two subpixels, the display data of the second and third subpixels is not limited to the stored address value. Let Both were stored in address value based on the coordinates of the first coordinate value of the pixel is read out display data of the sub-pixels (X _s, Y _s) first sub-pixel coordinate values to the right of the pixel, also If it indicates that the width is larger than the width of the two sub-pixels, the display data of the third sub-pixel is kept at the stored address value, and the display data of the first and second sub-pixels are read out. And storing the address value based on the coordinate values of the first and second sub-pixels of the coordinate value of the pixel on the right of the pixel coordinate value (X _s , Y _s ).

In order to solve the above-mentioned problems, the present invention is also configured to be arranged two-dimensionally in the X (horizontal) direction and the Y (vertical) direction, and each of the pixels arranged two-dimensionally. Is a display data generation device that is displayed on a display of a display device including first, second, and third sub-pixels having different colors, and the coordinate values (X _p , Y _{p) of} a point designated by the pointing device _p )
Receiving coordinate values _{(X p, Y p) X} p of the coordinates X _p x = X _p · a (X _e / X _pe)
Original display obtains a coordinate value x in the lateral direction to be, received coordinate values in the coordinate values X _p by substituting the (X _p, Y _p) coordinate value Y _p and y = Y _p of
Substituting (Y _e / Y _pe ) into Y _p to obtain the vertical coordinate value y of the coordinate value Y _{p that} is originally desired to be displayed, and the obtained coordinate values x and y
Has a first calculating means for outputting, X _e is a number value in the rightmost numbered from the left end in the coordinates of the display device pixel, Y _e is counted from the uppermost end in the coordinates of the display device pixel Te is a number value in the lowermost, also, X _pe is the number value in the rightmost numbered from the left end in the coordinates of the pointing device pixels, Y _e is counted from the uppermost end in the coordinates of the pointing device pixel The apparatus further receives coordinate values x and y from the first calculating means, truncates the received coordinate value x to the nearest whole number, and converts the coordinate value x into an integral coordinate value. X is obtained and output, and the decimal value of the received coordinate value y is rounded down to obtain an integer coordinate value Y of the coordinate value y, which corresponds to the intersection of the obtained coordinate value X and the obtained coordinate value Y. Arranged in two dimensions Second calculating means for forming display data of the first, second and third sub-pixels of the coordinate value (X, Y) of the pixel; and first, second and second forming means formed by the second calculating means. Storage means for accumulating the display data of the third sub-pixel in an address value based on the coordinate values of the first, second and third sub-pixels of the pixel coordinate value (X, Y); and output from the first arithmetic means Subtraction means for subtracting the coordinate value X output from the second arithmetic means from the coordinate value x to be obtained to obtain the value of xX, and the value of xX obtained by the subtraction means being smaller than the width of one sub-pixel of the sub-pixel Comparing means for judging whether the width is larger than one sub-pixel and if the width is larger than one sub-pixel and smaller than two sub-pixels, Connected to the device and controls the storage device Control means for performing xX from the comparing means.
Is smaller than the width of one sub-pixel, the display data of the first, second and third sub-pixels stored in the storage means are kept at the stored address value, If the value indicates that the width is larger than the width of one subpixel and smaller than the width of two subpixels, the display data of the second and third subpixels is kept at the stored address value, 1
The display data of the sub-pixel is read out and stored in the address value based on the coordinate value of the first sub-pixel of the coordinate value of the pixel on the right of the pixel coordinate value (X, Y). Is larger, the display data of the third sub-pixel is kept at the stored address value, the display data of the first and second sub-pixels are read out, and the coordinate values of the pixel are read out.
The coordinate value of the pixel on the right of (X, Y) is stored in an address value based on the coordinate values of the first and second sub-pixels.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a display data generating method according to the present invention will be described in detail with reference to the accompanying drawings.

The details of the first embodiment of the display data generating device are shown in the functional block diagram of FIG. Apparatus for generating display data shown in Figure 1, is input by the input means 10 the function x = F (Y), the coordinate values Y _s and the coordinate value element Y _e its longitudinal direction of the vertical direction via the image memory 12 It is sent to the comparison means 14. Comparison means 14 coordinates Y _s and Y _e compares the coordinate values Y _s ends the process of generating the display data in the case is large, the function x = F that received and if smaller (Y) and the coordinate values Y _s is sent to the calculating means 16.

The calculating means 16 substitutes Y _s for Y of F (Y) to obtain a horizontal coordinate value x _s of the line Y _{s which} is originally desired to be displayed.
Send a coordinate value Y _s and x _s computing means 18, a subtraction means 20. The calculating means 18 obtains a coordinate value X _s obtained by rounding down the decimal value of the coordinate value x _s or less to an integer and sends it to the subtracting means 20, and a two-dimensionally arranged pixel corresponding to the intersection of the coordinate values Y _s and X _s The display data of the R, G and B sub-pixels of the coordinate values (X _s , Y _s ) are formed and sent to the frame memory 24. The display data of the R, G and B sub-pixels is the coordinate value of the pixel
It is stored in an address value based on the coordinate values of the R, G, and B sub-pixels of (X _s , Y _s ).

The subtraction unit 20 sends the value of x _s -X _s to the comparator 22 by subtracting the coordinate value X _s from the coordinate values x _s. The comparison means 22 calculates x _s -X _s
Is smaller than the width of one sub-pixel of the sub-pixel, and if the width is larger than one sub-pixel in the determination, the width is larger than the width of one sub-pixel of the sub-pixel and the width of two sub-pixels It is determined whether the value is smaller than the threshold value, and the determination result is sent to the control means 30.

When the value of x _s -X _s from the comparing means 22 is smaller than the width of one sub-pixel, the control means 30 displays the R, G and B sub-pixel display data stored in the frame memory 24. Is stored in the stored address value. When the width is larger than the width of one subpixel and smaller than the width of two subpixels, the display data of the G and B subpixels is stored in the stored address value. , R, the display data of the sub-pixel is read out and stored in the address value based on the coordinate value of the R sub-pixel of the coordinate value of the pixel on the right of the pixel coordinate value (X _s , Y _s ). Is larger than the width of the pixel, the display data of the B sub-pixel is kept at the stored address value, and the display data of the R and G sub-pixels are read out and the pixel Is stored in an address value based on the coordinate values of the R and G sub-pixels of the coordinate value of the pixel on the right of the coordinate value (X _s , Y _s ) of the pixel.

The same processing is performed to the last line Y _e. The display data written and rewritten in the frame memory 24 in this manner is read out, and the video is displayed on the liquid crystal display.

Referring to FIG. 1, the apparatus comprises input means 1
0, image memory 12, comparing means 14, calculating means 16, calculating means 1
8, a subtracting means 20, a comparing means 22, a frame memory 24, a liquid crystal driving means 26, a liquid crystal display 28 and a control means 30.

The input means 10 comprises a function switch circuit and a tablet (pointing device) in this example. The function switch circuit is a function of a predetermined figure.
This circuit has a switch for generating x = F (Y), and this circuit generates a signal indicating x = F (Y) and outputs 100
Output to

The tablet generates start point coordinate values (X _s , Y _s ) and end point coordinate values (X _e , Y _e ) of the figure by the pen and outputs them from the output 100. Here and Y _s ≦ Y _e. The generation of the signal and the generation of the coordinate value are performed by a control signal from the control means 30.
102. The output 100 is connected to the image memory 12.

The image memory 12 is composed of, for example RAM, the start point coordinate values sent through the signal line 100 from the input unit _{10 (X s, Y s)} , end point coordinate values (X _e, Y _e) and x = F (Y)
Is temporarily stored therein. Writing of data to the RAM and reading of data from the RAM are performed based on a control signal 106 from the control means 30. The read data is output from the output 104 and sent to the comparing means 14.

The comparing means 14 comprises a comparing circuit and an adding circuit in this example. First, the comparison circuit
The Y _s inputted from the 104 as well as substituted into Y, is a circuit for comparing whether greater than Y _e to enter the Y from the input 104. In comparison, Y is terminated here process is greater than Y _e, Y start point coordinate values sent from the image memory 12 is smaller than _{Y e (X s, Y s} ), an end point The signal data of the coordinate values (X _e , Y _e ) and x = F (Y) are output to the output 108.

The adder circuit of the comparison means 14 based on the instruction of the control means 30, in this example generates the clogging Y _s + 1 = Y ₁ to generate a Y ₁ by adding 1 to Y _s. Then the comparator circuit of the comparison means 14 with substitutes Y ₁ that the generated Y, is a circuit which the Y compares whether greater than Y _e. In the comparison, if Y is greater than Y _e , the process ends here,
If Y is smaller than Y _e , the generated Y _s + 1 = Y ₁ and the start point coordinate values (X _s , Y _s ), end point coordinate values (X _e , Y _e ) sent from the image memory 12 and Output signal data of x = F (Y) 108
Output to

The adding circuit of the comparing means 14 also includes a control means 30
, Y ₁ + 1 = Y ₂ is generated, and the comparing circuit of the comparing means 14 substitutes the generated Y ₂ for Y and compares whether or not Y is larger than Y _e. Circuit. If Y in the comparison is larger than Y _e terminates the process here, Y is Y _e generated is smaller than the Y ₁ + 1 = Y ₂ and start point coordinate values sent from the image memory 12 (X _s , Y _s )
, Output the end point coordinate value ( _Xe , _Ye ) and signal data of x = F (Y)
Output to 108.

Similarly, the comparing means 14 sequentially generates Y ₃ , Y ₄ ,..., Y _e on the basis of the instruction of the control means 30 and substitutes them for Y in the order in which they are generated. Compare whether it is greater than Y _e . In this comparison, Y is terminated here process is greater than Y _e, Y sequentially and if smaller than _{Y e Y 3, Y 4,} ····, output Y _e from the output 108 as well as outputs from the image point coordinate values sent from the memory _{12 (X s, Y s)} , end point coordinate values (X _e, Y _e) and x = F signal data is also combined with the output 108 of the (Y) .

Similarly, the comparing means 14 generates Y _e +1 based on the instruction of the control means 30 and substitutes the generated Y _e +1 for Y.
The Y is compared whether greater than Y _e. In this case in this example, Y terminates processing here becomes larger than Y _e. The comparison and the addition are performed based on a control signal 110 from the control means 30. The output 108 is connected to the calculating means 16.

The calculating means 16 obtains F (Y _s ) by substituting Y _s for Y of F (Y) input from the input 108, and converts the obtained F (Y _s ) to x
Is an arithmetic circuit that obtains x _s by substituting into x. The obtained _xs is the value of the x-coordinate of the line of the starting point to be originally displayed, that is, the first line.

The calculating means 16 also receives F from the input 108
By substituting Y _s + 1 = Y ₁ for Y of (Y), F (Y ₁ ) was obtained.
F a (Y ₁₎ by substituting x is an arithmetic circuit for obtaining the x _1. This x ₁ which is determined is the value of x-coordinate of the next line of the start point of the line you want to display the original.

The calculating means 16 also receives F from the input 108
By substituting Y ₁ + 1 = Y ₂ for Y of (Y), F (Y ₂ ) was obtained.
F a (Y ₂₎ is substituted into x is an arithmetic circuit for obtaining the x _2. X of the next line of the obtained x ₂ is the x ₁ that you want to display the original line
This is the coordinate value.

Similarly, the calculating means 16 sequentially outputs F (Y ₃ ), F (Y ₄ ),.
And substitute the obtained F (Y ₃ ), F (Y ₄ ).
x ₃ , x ₄ ... are obtained, and when Y _e is finally obtained, F (Y _e ) is obtained. The obtained F (Y _e ) is substituted for x to obtain x _e . That is, the arithmetic unit 16 is _{Y s, Y 1, Y 2} , Y 3, Y 4, ····, the order of Y _e and
These two signal data are output from the output 112 in the order of x _s , x ₁ , x ₂ , x ₃ , x ₄ ,..., x _e and sent to the arithmetic means 18 and the subtraction means 20. The above calculation is performed based on a control signal 114 from the control means 30.

The arithmetic means 18 receives x _s , x ₁ , x ₂ , x ₃ ,
x ₄ , ..., x _e , in that order, the value is rounded down to the decimal point, and this truncated value is X _s , X ₁ , X ₂ , X ₃ , X ₄ , ..., X _e
Are sequentially input to X. X _s , X ₁ , X ₂ , X
_{3, X 4, ····, X} e is sent to output from the output 116 in the order determined subtracting means 20. The above calculation is a control signal from the control means 30.
118.

The calculating means 18 also calculates X _s , X ₁ , X ₂ , X
_3, X _{4, ····,} sequentially input from the X _e and input 112 Y _s, Y _1,
From Y ₂ , Y ₃ , Y ₄ ,..., Y _e , pixel coordinate values (X _s , Y _s ), (X ₁ ,
(Y ₁ ), (X ₂ , Y ₂ ), (X ₃ , Y ₃ ), (X ₄ , Y ₄ ), ..., (X _e , Y _e ) There is also a circuit for forming gradation data r, g and b for the coordinate values R (X, Y), G (X, Y) and B (X, Y) of the sub-pixels of the coordinate values. The formed gradation data r, g, and b are output from the output 117, sent to the frame memory 24, and temporarily stored in the address value corresponding to the coordinate value of the sub-pixel. The formation of the specific and gradation data is performed by the control signal 11 from the control means 30.
8

At this stage, when the image of the data stored in the frame memory 24 is displayed on the liquid crystal display 28, the image becomes jagged (jagged) as in the related art.

The subtraction means 20 pulls the value of X _s input from the input 116 from the value of x _s input from the input 112, a subtraction circuit for outputting a data value of the results minus the output 120. Subtraction means 20 also inputs from the value of x ₁ input from the input 112 116
Pull the value of X ₁ input from a subtraction circuit for outputting to the output 120 of the data value of the results minus. Subtraction means 20 also pulls the value of X ₂ input from x ₂ input from the value 116 inputted from the input 112, a subtraction circuit for outputting a data value of the results minus the output 120.

Similarly, the subtracting means 20 sequentially executes x ₃ -X ₃ , x ₄ -X ₄ ,.
, X _e -X _e are obtained, and the obtained x ₃ -X ₃ , x ₄ -X ₄ ,..., X _e -X _e are sequentially output from the output 120. This output 120 is connected to the input 120 of the comparison means 22. The above subtraction is performed based on a control signal 122 from the control means 30.

The comparing means 22 receives x _s -X _s , x ₁ -X ₁ , x ₂ from the input 120.
-X ₂ , x ₃ -X ₃ , x ₄ -X ₄ , ..., x _e -X _e
It has a circuit to compare whether it is smaller than 1/3.

In this comparison, when the difference is smaller than 1/3, that is, as shown in FIG. 3 (a), the deviation between the coordinate value of x to be originally displayed and X of the coordinate value (X, Y) of the pixel is smaller than one subpixel. If so, the comparison means 22 sends a signal to the control means 30 via output 124 indicating that it is less than 1/3.

When the control means 30 receives the signal indicating that it is smaller than 1/3, the control means 30 sets the coordinate values R (X, Y), G (X, Y) and B of the subpixel of the pixel coordinate value (X, Y). The gradation data r, g, and b stored in the address value corresponding to (X, Y) are kept at the same address value. That is, the control means 30
Since the data at the same address value remains at the same address value, the control signal 128 need not be particularly output. Alternatively, the control means 30 forms a read control signal 128 based on the address values corresponding to the coordinate values R (X, Y), G (X, Y) and B (X, Y) of the subpixel and outputs the read control signal 128.
To the frame memory 24, and the gradation data r, g and b
Once, and then read the coordinate value R (X,
Y), G (X, Y) and B (X, Y) are formed with a write control signal 128 based on address values and sent from the output 128 to the frame memory 24, and the read gradation data r, g and b are read out. It may be accumulated. In this case, it is assumed that it is smaller than 1/3, but a case where it is equal to 1/3 may be included.

When the data value is larger than 1/3, the comparing means 22 has a circuit for comparing whether the data value is smaller than 2/3.

In this comparison, when the difference is smaller than 2/3, that is, as shown in FIG. 3 (b), the deviation between the x coordinate value of the pixel to be originally displayed and the X of the coordinate value (X, Y) of the pixel is smaller than one subpixel. If it is larger than two sub-pixels, the comparing means 22
Outputs a signal that is greater than 1/3 and less than 2/3
Output to 124.

When the control means 30 receives the signal indicating that it is larger than 1/3 and smaller than 2/3, the control means 30 sets the coordinate values (X,
The gradation data g and b stored in the address values corresponding to the coordinate values G (X, Y) and B (X, Y) of the sub-pixel of (Y) are kept as they are. Further, the control means 30 forms a control signal 128 for reading out the gradation data r stored at an address value corresponding to the coordinate value R (X, Y) of the sub-pixel of the pixel coordinate value (X, Y), and outputs the control signal 128.
To the frame memory 24, and an address corresponding to the coordinate value R (X + 1, Y) of the sub-pixel of the coordinate value (X + 1, Y) of the pixel on the right of the coordinate value (X, Y) of this pixel Control signal 128 for writing the read gradation data r
From the output 128 to the frame memory 24. In addition,
In this case, it is assumed that it is smaller than 2/3, but the case where it is equal to 2/3 may be included in this.

In this comparison, when the difference is larger than 2/3, that is, as shown in FIG. 3 (c), the deviation between the x coordinate value of the pixel to be originally displayed and the X of the coordinate value (X, Y) of the pixel is smaller than 2 subpixels. If so, the comparison means 22 outputs a signal indicating that it is larger than 2/3 to the output 124.

The control means 30, which has received the signal indicating that the value is larger than 2/3, stores the address value corresponding to the coordinate value B (X, Y) of the subpixel of the pixel coordinate value (X, Y). The existing gradation data b is kept at the same address value. Further, the control means 30 calculates the gradation data r and g stored at the address values corresponding to the coordinate values R (X, Y) and G (X, Y) of the sub-pixels of the pixel coordinate values (X, Y). A control signal 128 to be read out is formed and sent from the output 128 to the frame memory 24, and the coordinate value R (X) of the sub-pixel of the coordinate value (X + 1, Y) of the pixel immediately to the right of the coordinate value (X, Y) of this pixel A control signal 128 for writing the read gradation data r and g to address values corresponding to (+1, Y) and G (X + 1, Y) is formed and sent from the output 128 to the frame memory 24. The comparison is performed based on a control signal 126 from the control means 30.

The frame memory 24 is composed of three RGB frame memories, and these three frame memories are composed of, for example, a RAM. The storage capacity of each of the R, G, and B frame memories is based on a liquid crystal display described later.
Each pixel constituted by 28 (in the first embodiment, FIG.
And in the second embodiment to be described later, see FIG. 5. In each case, the pixel configuration is basically the same), and the gradation of each sub pixel is based on the number of R, G and B sub pixels. Is good. Further, the addresses at the storage positions of the respective data stored in the R, G and B frame memories are configured to correspond to the respective pixel positions of the liquid crystal display 28.

The gradation data r, g, and b sent from the arithmetic means 18 via the signal line 117 are sent to the R, G, and B frame memories, and are temporarily stored in the address values corresponding to the coordinate values of the corresponding sub-pixels. You. R, G
The reading of data from the B and B frame memories and the writing of data to the R, G and B frame memories are performed based on a control signal 128 from the control means 30.

In order to eliminate jaggedness and smooth the gradation data, the gradation data r, g and b once stored in this manner are read out based on the control signal 128 from the control means 30, and the read out gradation data is Control signal from control means 30
128 is written to a predetermined address value different from the above read address value. That is, predetermined gradation data is rewritten to eliminate jaggedness. The gradation data thus written and rewritten is read out based on a control signal 128 from the control means 30 and sent to the liquid crystal drive means 26 through the signal line 130.

The liquid crystal driving means 26 comprises a signal control section, a scanning (gate) line driving circuit (vertical driving circuit), a data line driving circuit (horizontal driving circuit) and the like.

The signal controller is connected to a signal line from the frame memory 24.
Various signals necessary for displaying the liquid crystal display 28 are formed from the gradation data rgb sent via 130 and the control signal including the synchronization signal sent from the control means via the control line 132. The gate line driving circuit drives the gate line 134 of the liquid crystal display 28 according to a signal from the signal control unit. More specifically, the gate line driving circuit is a digital circuit having a function of selecting each gate line once per frame of the liquid crystal display 28.

The data line driving circuit drives the data lines 136 of the liquid crystal display 28 according to a signal from the signal control unit.
More specifically, the data line driving circuit is a liquid crystal display 28
In this example, when a scanning voltage is applied to a gate line, a TFT is applied to a liquid crystal element composed of a liquid crystal material filled between a transparent electrode on a thin film transistor (TFT) substrate and an opposing transparent electrode on a color filter substrate. This is a circuit for applying a voltage corresponding to the gradation data rgb (video information) through the circuit.

In this example, an active matrix TFT-LCD is used as the liquid crystal display 28. An active matrix TFT-LCD is a display in which TFTs for selectively applying a voltage to each liquid crystal pixel and liquid crystal pixels are arranged in an array on a glass substrate. Depending on the number of display pixels, gate lines are arranged in the horizontal direction and data lines are arranged in the vertical direction. In this example, the coordinates of the pixels of this display are represented by (X, Y) where X is the horizontal direction and Y is the vertical direction, as shown in FIGS. Here, X and Y are natural numbers. Therefore, in this display, 1 + Y gate lines and (1 + X) · 3 (corresponding to each color of RGB) data lines are arranged.

In this display, in this example, a TFT side substrate composed of TFTs, data lines, gate lines, transparent electrodes, and the like, and a color filter substrate composed of RGB color filters, a black matrix, and a counter electrode are aligned. It is attached, stuck and integrated. A liquid crystal material is injected into the gap between the two substrates and sealed.

At this time, one display pixel (pixel) in this example is composed of three sub-pixels (sub-pixels) of R, G and B as shown in FIG. As you can see from the figure,
The sub-pixel is a vertically long rectangle obtained by dividing the pixel horizontally into three equal parts, and is arranged in the order of RGB from the left. Data is input to each RGB sub-pixel. Similar to the coordinates of the above pixel, the coordinates of the sub-pixels of R, G, and B are represented by R (X, Y), G (X,
Y) and B (X, Y).

In this display, the fluorescent lamp white light converted into a uniform surface light source by the light guide plate is introduced into each of the R, G, and B sub-pixels, and is separated and colored by a color filter. At this time,
The light transmittance is adjusted by the voltage applied to the liquid crystal element. As described above, color display is performed by adding and mixing the three primary colors of R, G, and B with the voltage applied to each liquid crystal element.

The control means 30 is a control section for controlling each functional section of the apparatus. The control means 30 controls the input means 10 via the control line 102, the image memory 12 via the control line 106, the comparison means 14 via the control line 110, and the control line 114. To the arithmetic means 16 through the control line 11
8 to the arithmetic means 18 and the subtraction means through the control line 122.
Control signals are output to the control unit 20 via the control line 126 to the comparison unit 22 and to the liquid crystal drive unit 26 via the control line 132 to control the operation of each unit.

The control means 30 is, in particular, a signal line from the comparison means 22.
The gradation data r, g, and b stored in the frame memory 24 are left as they are, based on the deviation between the coordinate value of x which is originally desired to be displayed and the coordinate value of the pixel (X, Y) X, which is transmitted through the line 124. A control signal for causing the read gradation data to remain at the address value or for reading the predetermined gradation data and storing the read gradation data at an address value different from the address value of the read gradation data is sent to the frame memory 24 through the control line 128. .

When the writing and rewriting of the gradation data for a certain scanning line into the frame memory 24 are completed, the control means 30 particularly supplies the adding circuit of the comparing means 14 with the scanning line next to the above-mentioned certain scanning line, that is, at a certain one. One is added to the scanning line, and an instruction is made to process the next scanning line after the certain scanning line. This instruction is performed until the processing of the display data is completed.

Although the circuit system of the above device is a wired logic control system using flip-flops and logic gates, it may be a microprogram control system controlled by a program. That is, for example, the image memory 12 configured by the wired logic control method, the comparing means 14 and 2
2. The arithmetic means 16, 20, the subtraction means 20, the frame memory 24, the control means 30, and the like may be of a microprogram control system including, for example, a CPU, a ROM for storing an execution program, and a RAM for recording necessary data.

The operation of the first embodiment will be described with reference to the flowchart of FIG.

First, the operator generates a function x = F (Y) by turning ON the function switch of the input means 10. Next, the operator operates the tablet pen of the input means 10 to start the coordinate values (X _s , Y _s ) and end coordinate values of the above function.
(X _e , Y _e ) is generated. The generated start point coordinate values (X _s ,
Y _s), the signal data of the end point coordinate values (X _e, Y _e) and x = F (Y) is stored temporarily sent to the image memory 12. The stored data is read and sent to the comparison means 14.

The comparison circuit of the comparison means 14 first receives the input Y _s
Is substituted for Y (402). Then the comparison circuit the Y clogging Y _s
There comparing whether greater than Y _e to enter (404). In this comparison, Y _s is finished here process is greater than Y _e (406). But the starting point coordinate values since Y _s in this example is less than Y _e and sends it to the (X _s, Y _s), end point coordinate values (X _e, Y _e) and x = F computing means 16 the signal data (Y) .

The calculating means 16 substitutes Y _s for Y of the input F (Y) to obtain F (Y _s ), substitutes the obtained F (Y _s ) for x, obtains x _s, and obtains Y _s and send a x _s determined in computing means 18 and subtraction means 20 (408). The obtained x _s is the starting line Y _s that you want to display
Is the value of the x coordinate.

[0062] computing means 18 rounded down value of x _s to be input, inputs the truncated value or X _s to X, and sends the X _s obtained in the subtracting means 20 (410). Arithmetic means
18 also coordinates from the obtained X _s and input to Y _s pixel (X _s, Y _s) as well as specifying the coordinate value R of Zabupikuseru coordinate values of the specified pixel (X _s, Y _s), G (X _s, Y _s) and B (X _s, Y _s) gray data for r, to form the g and b. The formed gradation data rgb is sent to the frame memory 24 and temporarily stored in an address value corresponding to the coordinate value of the sub-pixel.

[0063] subtracting means 20 is input from the value of the input x _s
Pull the value of X _s, the result of subtracting the data value x _s -X _s comparing means
Send to 22. The comparing means 22 determines that the input x _s -X _s data value is 1 /
Compare whether it is less than 3 (412). 1/3 is smaller than in the comparison, i.e. the coordinate values and the coordinate values of the pixels of x _s to be originally displayed (X _s, Y _s) when the deviation between the X _s of less than one subpixel, the comparison means 22 1 A signal indicating smaller than / 3 is sent to the control means 30.

[0064] control means receives a signal indicating that less than one third 30, the coordinate values of said pixel (X _s, Y _s) coordinate value of Zabupikuseru of _{R (X s, Y s)} , G (X s , Y _s ) and the gradation data rgb stored in the address values corresponding to B (X _s , Y _s ) are kept as they are (414). If the data value is larger than 1/3, the comparing means 22 compares whether the data value is smaller than 2/3 (416).

[0065] 2/3 is smaller than in the comparison, i.e. the coordinate values and the coordinate values of the pixels of x _s to be originally displayed (X
_If the deviation of _s , Y _s ) from X _s is greater than 1 subpixel and less than 2 subpixels, the comparison means 22 will be greater than 1/3.
A signal indicating that it is smaller than 2/3 is sent to the control means 30.

The control means 30, which has received the signal indicating that it is larger than 1/3 and smaller than 2/3, sets the coordinate values (X _s , Y _s ) of the pixel.
Coordinates G (X _s, Y _s) of the Zabupikuseru and B (X _s, Y _s) to remain in it the address value gradation data g and b stored in the address value corresponding to. The control unit 30 reads the coordinate value of the pixel (X _s, Y _s) coordinate value of Zabupikuseru of R (X _s, Y _s) of the gradation data r accumulated in the address value corresponding to the frame memory 24, coordinate value of a pixel (X _s, Y _s) coordinate values of the right of the pixel (X _s +1,
The read gradation data r is written to an address value corresponding to the coordinate value R (X _s +1, Y _s ) of the sub pixel of Y _s ) (418).
.

[0067] When 2/3 larger in the comparison, i.e. the coordinate values and the coordinate values of the pixels of x _s to be originally displayed (X
_s , Y _s ) is more than 2 subpixels away from X _s ,
The comparing means 22 outputs a signal indicating that it is larger than 2/3 to the control means.
Send to 30.

[0068] Control means 30 receives a signal indicating that larger than 2/3, the coordinate value of the pixel (X _s, Y _s) coordinate value B (X _s, Y _s) of Zabupikuseru of the address value corresponding to The stored gradation data b is kept at the same address value. The control means 30 coordinates of a pixel (X _s, Y _s) coordinate R (X _s, Y _s) of Zabupikuseru of and G (X _s, Y _s) gradation data stored in an address value corresponding to a r and g are read from the frame memory 24, and the coordinate values (X _s ,
Coordinate value of the right neighboring pixels of _{Y s) (X s + 1} , Y -coordinate values of Zabupikuseru of _{s) R (X s + 1} , Y s) and G (X _s + 1, the address corresponding to the Y _s) The read gradation data r and g are written in the value (420).

[0069] Display data for the line Y _s by the end of any of the processes in steps 414,418,420 are generated. Line Y _s display control means 30 and data is generated of an instruction to generate a Y _s + 1 = Y ₁ adds 1 to Y _s to an adder comparison means 14 (422). Next, the comparison circuit calculates this Y, that is, Y ₁
There comparing whether greater than Y _e to enter (404). In this comparison, Y ₁ is completed here process is greater than Y _e (406). However, in this example, since Y ₁ is smaller than Y _e , Y ₁ , the start point coordinate values (X _s , Y _s ), and the end point coordinate values (X _e ,
The signal data of Y _e ) and x = F (Y) are sent to the calculating means 16.

The arithmetic means 16 substitutes Y ₁ for Y of the input F (Y) to obtain F (Y ₁ ), substitutes the obtained F (Y ₁ ) for x, obtains x _1, and obtains Y ₁ and x ₁ determined sent to the arithmetic unit 18 and subtraction unit 20 (408). Line Y _s of the starting point you want to display originally x ₁ found
Of the value of the x coordinate of the next line Y _1.

The arithmetic means 18 cuts off the decimal part of the input x ₁ value, inputs the cut-off value, that is, X ₁ to X, and sends the obtained X ₁ to the subtracting means 20 (410). Arithmetic means
18 also obtained X ₁ and the input coordinate values from Y ₁ pixel (X _1, Y ₁₎ with identifying a coordinate value R of Zabupikuseru coordinate values of the specified pixel (X _1, Y _1), The gradation data r, g and b for G (X ₁ , Y ₁ ) and B (X ₁ , Y ₁ ) are formed. The formed gradation data rgb is sent to the frame memory 24 and temporarily stored in an address value corresponding to the coordinate value of the sub-pixel.

[0072] subtracting means 20 is inputted from the value of x ₁ input
Pull the value of X _1, compares the data value x ₁ -X ₁ results subtracting means
Send to 22. The comparing means 22 determines that the input data value of x ₁ -X ₁ is 1 /
Compare whether it is less than 3 (412). If 1/3 is smaller than in the comparison, i.e. the deviation between X ₁ of the coordinate values of the coordinate values of x ₁ and the pixel to be originally displayed (X _1, Y ₁₎ less than 1 sub-pixel, comparing means 22 1 A signal indicating smaller than / 3 is sent to the control means 30.

Upon receiving the signal indicating that the coordinate value is smaller than 1/3, the control means 30 adjusts the coordinate values R (X ₁ , Y ₁ ), G (X ₁ ) of the subpixel of the pixel coordinate value (X ₁ , Y ₁ ). , Y ₁ ) and the gradation data rgb stored in the address values corresponding to B (X ₁ , Y ₁ ) are kept as they are (414). If the data value is larger than 1/3, the comparing means 22 compares whether the data value is smaller than 2/3 (416).

[0074] 2/3 is smaller than in the comparison, i.e. the coordinate values of the coordinate values of x ₁ and the pixel to be originally displayed (X
_If the deviation of ( ₁ , ₁ ) from X ₁ is greater than 1 subpixel and less than 2 subpixels, the comparison means 22 will be greater than 1/3.
A signal indicating that it is smaller than 2/3 is sent to the control means 30.

The control means 30, which has received the signal indicating that the value is larger than 1/3 and smaller than 2/3, sets the coordinate value (X ₁ , Y ₁ ) of the pixel.
The grayscale data g and b stored in the address values corresponding to the coordinate values G (X ₁ , Y ₁ ) and B (X ₁ , Y ₁ ) of the sub-pixel are kept as they are. The control unit 30 reads out coordinate values of the pixels (X _1, Y ₁₎ coordinate R (X _1, Y ₁₎ gradation data r accumulated in the address value corresponding to the Zabupikuseru from the frame memory 24, The coordinate value of the pixel to the right of the pixel coordinate value (X ₁ , Y ₁ ) (X ₁ +1,
The read gradation data r is written to an address value corresponding to the coordinate value R (X ₁ +1, Y ₁ ) of the sub pixel of Y ₁ ) (418).
.

[0076] When 2/3 larger in the comparison, i.e. the coordinate values of the coordinate values of x ₁ and the pixel to be originally displayed (X
₁ , Y ₁ ) deviates from X _{1 by more} than 2 subpixels,
The comparing means 22 outputs a signal indicating that it is larger than 2/3 to the control means.
Send to 30.

[0077] Control means 30 receives a signal indicating that larger than 2/3, the address value corresponding to the coordinate value of the pixel (X _1, Y ₁₎ coordinate value of Zabupikuseru B of (X _1, Y ₁₎ The stored gradation data b is kept at the same address value. Further, the control means 30 controls the gradation data stored in the address value corresponding to the coordinate values R (X ₁ , Y ₁ ) and G (X ₁ , Y ₁ ) of the sub-pixels of the pixel coordinate values (X ₁ , Y ₁ ). r and g are read from the frame memory 24, and the coordinate values (X ₁ ,
Y ₁₎ address corresponding to the coordinate value R of Zabupikuseru _{(X 1 + 1, Y 1} ) and _{G (X 1 + 1, Y} 1) of the coordinate values of the right of the pixel _{(X 1 + 1, Y 1} ) of The read gradation data r and g are written in the value (420).

[0078] Display data for the line Y ₁ by the end of any of the processes in steps 414,418,420 are generated. Line display control means 30 and data is generated for Y ₁ is instructed to generate a Y ₁ + 1 = Y ₂ 1 to Y ₁ in addition to the adder circuit comparing means 14 (422). After this, also been carried out the same processing as Y ₁ Y ₂ is display data for the line Y ₁ are generated.

[0079] In _{addition, Y 3, Y 4, ···} , Y 1 and also for the Y _e
Y ₂ Similar processing is performed with the line Y _3, Y _4, ···, the display data for Y _e is generated. And control means display data lines Y _e is generated 30 1 Y _e to the adder circuit of the comparing means 14
Is added to generate Y _e +1 (422). Then the comparison circuit compares whether greater than Y _e entered this Y clogging Y _e +1 (404). In this comparison, in this case, Y _e +1
Is larger than Y _e , and the process is terminated here (406).

Subsequently, the lines Y _s, Y _1, Y _2, Y which have been written and rewritten in the frame memory 24 in this manner
The gradation data rgb of ₃ , Y ₄ ,..., Y _e are read out by the control means 30 and sent to the liquid crystal drive means 26. The liquid crystal driving means 26 forms various signals necessary for displaying the liquid crystal display 28 from the gradation data rgb sent from the frame memory 24 and the control signal including the synchronization signal sent from the control means 30, and Send to 28. Liquid crystal display
28 displays the image of the transmitted gradation data rgb on its display.

As described above, according to the first embodiment, FIGS.
When the input data of the images displayed in FIGS. 16 and 17 is input to the apparatus of the first embodiment, the images as shown in FIGS. 7, 8 and 9 are displayed.

The details of the second embodiment of the display data generating device are shown in the functional block diagram of FIG. In the apparatus shown in FIG. 10, the coordinate values (X _p , Y _p ) of the pointing point input by the pointing device of the input means 50 are sent to the calculation means 52 via the image memory 12. Calculating means 52 coordinates (X _p, Y _p) the coordinates X _p of _{x = X p · (X e} / X pe) transverse coordinates to be originally displayed at the X-coordinate value is substituted into _p X _p of obtains the value x, the coordinate value Y _p and y = Y _p · coordinate value is substituted into Y _p of _{(Y e / Y pe) Y} p
Then, the vertical coordinate value y to be displayed is calculated and the coordinate values x and y are sent to the calculating means 54 and the subtracting means 20. Here, X _e is a number value in the coordinate in the rightmost numbered from the left end of the liquid crystal display 28 pixels, Y _e is the number value in the lowermost counted from the uppermost end in the coordinates of the liquid crystal display 28 pixels , and the addition, X _pe is the number value in the rightmost numbered from the left end in the coordinates of the pointing device pixels, Y _e is the number value in the lowermost counted from the uppermost end in the coordinates of the pointing device pixel It is.

The arithmetic means 54 obtains a coordinate value X obtained by truncating the decimal value of the coordinate value x or less to an integer and outputs it to the subtracting means 20, and obtains a coordinate value Y obtained by truncating the decimal value of the coordinate value y or less. R of the coordinate values (X, Y) of the two-dimensionally arranged pixels corresponding to the intersection of the coordinate values X and Y,
The display data of the G and B sub-pixels is formed and sent to the frame memory 24. The display data of the R, G, and B sub-pixels is stored in an address value based on the coordinate values of the R, G, and B sub-pixels of the pixel coordinate value (X, Y).

The subtracting means 20 obtains the value of xX by subtracting the coordinate value X from the coordinate value x and sends it to the comparing means 22. The comparison means 22 is x-
It is determined whether the value of X is smaller than the width of one subpixel of the subpixel. If the width is larger than one subpixel, the width is larger than the width of one subpixel of the subpixel and two subpixels are determined. It is determined whether the width is smaller than the width, and the determination result is sent to the control means 56.

When the value of xX is smaller than the width of one sub-pixel, the control means 56 causes the display data of the R, G and B sub-pixels stored in the frame memory 24 to remain at the stored address value, If the width is larger than one subpixel and smaller than two subpixels,
The display data of the G and B sub-pixels is kept at the stored address value, the display data of the R sub-pixel is read out, and the first coordinate value of the pixel to the right of the pixel coordinate value (X, Y) is read out. If the width is larger than the width of two sub-pixels, the display data of the B sub-pixel is kept at the stored address value, and the sub-pixels of R and G are stored. The display data of the pixel is read, and R and G of the coordinate value of the pixel on the right of the coordinate value (X, Y) of the pixel are read out.
Is stored in the address value based on the coordinate value of the sub-pixel. The display data written and rewritten in the frame memory 24 in this manner is sent to the liquid crystal display 28, and the image is displayed.

Referring to FIG. 10, the apparatus comprises input means 5
0, image memory 12, arithmetic means 52, arithmetic means 54, subtraction means 2
0, comparing means 22, frame memory 24, liquid crystal driving means 26,
It comprises a liquid crystal display 28 and control means 56. In FIG. 10, components denoted by the same reference numerals as those shown in FIG. 1 basically have the same functions, and thus description thereof will be omitted.

The input means 50 comprises a pointing device (tablet) in this example. When a certain point is pointed by the pen of the pointing device, the pointed coordinate values (X _p , Y _p )
Is generated and output from output 100. The data indicating the coordinate values (X _p , Y _p ) output from the output 100 is sent to the image memory 12, temporarily stored, and sent to the calculation means 52 via the signal line 104. The generation of the coordinate value is based on the control signal 102 from the control means 56.
It is performed based on.

The arithmetic means 52 is a coordinate value input from the input 104
(X _p, Y _p) x is determined for X _p by substituting X _p in the following equation (1), also coordinate value inputted from the input 104 (X _p, Y _p) of the Y _p of the following ( 2) a calculation circuit for obtaining the y versus Y _p by substituting the formula.

X = X _p · (X _e / X _pe ) ·· (1) y = Y _p · (Y _e / Y _pe ) ·· (2) where X _e and Y _e are When the coordinates of the pixels on the display of the liquid crystal display 28 are (X, Y), the upper left is (0,
0), and the value of X _e and element Y _e when the lower right and (X _e, Y _e) (see FIG. 5). The X _pe and Y _pe, when the coordinates of the pointing device and (X _p, Y _p), the upper left
(0,0), and the lower right _{(X pe, Y pe) X} pe and when formed into a
This is the value of Y _pe (see FIG. 11).

The reason why such a calculation is performed is that the resolution (pixel pitch) of the liquid crystal display 28 and the resolution of the pointing device are generally different, and the coordinates (x, y). The obtained coordinates (x, y) are the coordinate values that are originally desired to be displayed. Arithmetic means 52
Outputs the obtained x and y from an output 112 and outputs
And to the subtraction means 20. The above calculation is performed based on a control signal 114 from the control means 56.

The arithmetic means 54 truncates the value of x input from the input 112 to the decimal point, inputs the truncated value to X, and also truncates the value of y input from the input 112 to the decimal point. Is input to Y. The obtained X is output from the output 116 and sent to the subtraction means 20. The above calculation is performed based on a control signal 118 from the control means 56.

The calculating means 54 also specifies the coordinate value (X, Y) of the pixel from the obtained X and Y, and also calculates the coordinate values R (X, Y), G (X ,
There is also a circuit for forming gradation data r, g and b for Y) and B (X, Y). The formed gradation data r, g
And b are output from the output 117 of the frame memory 24.
And temporarily stored in an address value corresponding to the coordinate value of the sub-pixel. The above-described specification and formation of gradation data are performed based on a control signal 118 from the control means 56.

The control means 56 is a control section for controlling each functional section of the present apparatus. The control means 56 controls the input means 50 through the control line 102, the image memory 12 through the control line 106, the arithmetic means 52 through the control line 114, and the control line. Control line to operation means 54 through 118
Control signals are output to the subtraction means 20 through 122, to the comparison means 22 through the control line 126, and to the liquid crystal drive means 26 through the control line 132, respectively, to control the operation of each unit.

The control means 56 is, in particular, a signal line from the comparison means 22.
The gradation data r, g, and b stored in the frame memory 24 are left as they are, based on the deviation between the coordinate value of x which is originally desired to be displayed and the coordinate value of the pixel (X, Y) X, which is transmitted through the line 124. A control signal for causing the read gradation data to remain at the address value or for reading the predetermined gradation data and storing the read gradation data at an address value different from the address value of the read gradation data is sent to the frame memory 24 through the control line 128. .

In this example, the wired logic control system is used in the device of the second embodiment as in the device of the first embodiment, but a microprogram control system in which control is performed by a program may be used. For example, a CPU, a ROM for storing an execution program, and the like include an image memory 12, a comparing unit 22, arithmetic units 52 and 54, a subtracting unit 20, a frame memory 24, and a controlling unit 56 which are configured by a wired logic control system.
A microprogram control method including a RAM for recording necessary data may be used.

The operation of the second embodiment will be described with reference to the flow of FIG.

First, the operator points at a certain point by operating the pen of the pointing device of the input means 50. Then, the pointed coordinate values (X _p , Y _p )
Is generated, sent to the image memory 12, and temporarily stored in the arithmetic means.
Sent to 52.

[0098] computing means 52 coordinate value input _{(X p, Y p) X} p of
The search of x for X _p is substituted into equation (1), also coordinate value input (X _p, Y _p) of the Y _p of substituted into equation (2) determining the y versus Y _p (502 ). The calculating means 52 calculates the obtained x and y
Is sent to the calculating means 54 and the subtracting means 20.

The arithmetic means 54 cuts off the decimal part of the input x value, inputs the truncated value to X, and also rounds down the decimal value of the input y value, and inputs this truncated value to Y. (504). The obtained X is sent to the subtraction means 20. The calculating means 54 also specifies the coordinate value (X, Y) of the pixel from the obtained X and Y, and the coordinate values R (X, Y), G (X, Y) of the sub-pixel of the specified pixel coordinate value. And the gradation data r, g and b for B (X, Y). The formed gradation data r, g, and b are sent to the frame memory 24 and temporarily stored in the address value corresponding to the coordinate value of the sub-pixel.

The subtracting means 20 subtracts the input value of X from the input value of x, and compares the subtracted data value xX with the comparing means 22.
Send to The comparing means 22 compares whether the input data value of xX is smaller than 1/3 (506). In this comparison 1 /
If the difference is smaller than three, that is, if the deviation between the coordinate value of x originally desired to be displayed and X of the coordinate value (X, Y) of the pixel is smaller than one subpixel, the comparing means 22 outputs a signal indicating that the difference is smaller than 1/3. Send to control means 56.

The control means 56 having received the signal indicating that the pixel value is smaller than 1/3, the coordinate value R (X, Y), G (X, Y) and B (X , Y), the gradation data rgb stored in the address value corresponding to the address value is kept at the same address value (508). When the data value is larger than 1/3, the comparing means 22 compares whether the data value is smaller than 2/3.
(510).

In this comparison, if it is smaller than 2/3, that is, the coordinate value of x and the coordinate value of the pixel to be originally displayed
If the deviation of (X, Y) from X is greater than 1 subpixel and less than 2 subpixels, the comparison means 22 determines that the deviation is greater than 1/3.
A signal indicating that it is smaller than 2/3 is sent to the control means 56.

The control means 56 which has received the signal indicating that the coordinate value is larger than 1/3 and smaller than 2/3, the coordinate value G (X, Y) and B (X, Y) of the sub-pixel of the coordinate value (X, Y) of the pixel. The gradation data g and b stored in the address value corresponding to Y) are kept at the same address value. Control means 56
Is the coordinate value R of the sub-pixel of the pixel coordinate value (X, Y)
The gradation data r stored at the address value corresponding to (X, Y) is read from the frame memory 24, and the coordinate value (X + 1, Y) of the pixel immediately to the right of the pixel coordinate value (X, Y) is calculated. The read gradation data r is written to an address value corresponding to the coordinate value R (X + 1, Y) of the sub pixel (512).

In this comparison, when the value is larger than 2/3, that is, the coordinate value of x and the coordinate value of the pixel to be originally displayed
If the deviation of (X, Y) from X is greater than 2 subpixels,
The comparing means 22 outputs a signal indicating that it is larger than 2/3 to the control means.
Send to 56.

The control means 56, which has received the signal indicating that it is larger than 2/3, stores the gradation stored in the address value corresponding to the coordinate value B (X, Y) of the pixel coordinate value (X, Y). The data b is kept at the same address value. Further, the control means 56 stores the gradation data r and g stored at the address values corresponding to the coordinate values R (X, Y) and G (X, Y) of the pixel coordinates (X, Y) in the frame memory.
Read from 24, coordinate value of pixel (X + 1, Y) to the right of pixel coordinate value (X, Y) Subordinate pixel coordinate value R (X + 1, Y)
The read gradation data r and g are written to an address value corresponding to G (X + 1, Y) (514).

Upon completion of any of the processes in steps 508, 512, and 514, display data for the coordinate values (X _p , Y _p ) pointed is generated. The flow in FIG. 12 is a flow when one pointing point (X _p , Y _p ) is accumulated in the image memory 12, and a plurality of pointing points (X _p , Y _p ) are accumulated in the image memory 12. In such a case, for example, the above processing may be repeated up to the last pointing point.

Subsequently, the pointing point at which the writing and rewriting to the frame memory 24 are performed as described above is performed.
The gradation data rgb of (X _p , Y _p ) is read out by the control means 56 and sent to the liquid crystal drive means 26. The liquid crystal driving means 26 forms various signals necessary for displaying the liquid crystal display 28 from the gradation data rgb sent from the frame memory 24 and the control signal including the synchronization signal sent from the control means 56, and Send to 28. The liquid crystal display 28 displays the image of the sent gradation data rgb on the display.

As described above, according to the second embodiment, the coordinate value of the gradation data, that is, the coordinate value of the display data is the coordinate value of the sub-pixel close to the pointing point (X _p , Y _p ).

In the first and second embodiments, the sub pixels in one pixel are R (red), G (green),
It is assumed that the sub-pixels are composed of B (blue) sub-pixels.
(Green), B (blue), and W (white) sub-pixels may be used. In the first and second embodiments, the arrangement of the zab pixels is a vertical stripe arrangement.
A horizontal stripe arrangement, a delta arrangement, or a triangle arrangement may be used.

[0110]

Thus, according to the present invention, the control means relates to the line Y _s and the value of x _s -X _s from the second comparison means is one.
If the width is smaller than the width of the sub-pixel, the display data of the first, second, and third sub-pixels stored in the storage means is kept at the stored address value. If the width is smaller than the width of the sub-pixel, the display data of the second and third sub-pixels is kept at the stored address value, and the display data of the first sub-pixel is read and the coordinate value (X _s , Y _s ) is stored in the address value based on the coordinate value of the first sub-pixel of the coordinate value of the pixel on the right side of the right-hand side of the pixel, and if it indicates that the coordinate value is larger than the width of the two sub-pixels, 3 is kept at the stored address value, and the first and second sub-pixels are displayed.
It reads the display data of the sub-pixel coordinate value of the pixel (X _s, Y _s) are allowed to accumulate in the first and the address value based on the coordinate values of the second sub-pixel coordinate values to the right of the pixel. This device performs such processing on the last line.
Go to Y _e .

As described above, the sub-pixel close to the coordinate value to be originally displayed is selected, and the data of the selected sub-pixel is stored in the storage means. Therefore, if the display data written and stored in the storage means is read out and the image is displayed on the display device, a jagged image can be obtained.

According to another aspect of the present invention, the control means performs the same processing as that of the above-described control means with respect to the pointing points (X _p , Y _p ).

As described above, the sub-pixel close to the pointing point is selected, and the data of the selected sub-pixel is stored in the storage means. Therefore, if the display data written and stored in the storage means is read out and the image is displayed on the display device, an image without jaggies can be obtained as a result.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a specific configuration of a first embodiment of a display data generation device according to the present invention.

FIG. 2 is a diagram illustrating an example of a function, a start point, and an end point output from an input unit of the first embodiment illustrated in FIG. 1;

FIG. 3 is a diagram showing an example of a relationship between a pixel position of a liquid crystal display, a pixel position of a frame memory corresponding to the pixel position of the liquid crystal display, and a position to be originally displayed in the first and second embodiments shown in FIGS. 1 and 10; .

FIG. 4 is a diagram showing an example of pixel coordinates of the liquid crystal display of the first embodiment shown in FIG.

FIG. 5 is a diagram showing an example of pixel coordinates of the liquid crystal display of the second embodiment shown in FIG.

FIG. 6 is a flowchart showing an example of the operation of the first embodiment shown in FIG. 1;

FIG. 7 is a view showing an image displayed on the liquid crystal display when the same data as the input data of the image shown in FIG. 15 is input from the input means of the first embodiment shown in FIG.

8 is a diagram showing an image displayed on the liquid crystal display when the same data as the input data of the image shown in FIG. 16 is input from the input means of the first embodiment shown in FIG.

9 is a diagram showing an image displayed on the liquid crystal display when the same data as the input data of the image shown in FIG. 17 is input from the input means of the first embodiment shown in FIG.

FIG. 10 is a functional block diagram showing a specific configuration of a second embodiment of the display data generation device according to the present invention.

FIG. 11 is a diagram showing coordinates of pixels of a pointing device of the input means of the second embodiment shown in FIG. 10;

FIG. 12 is a flowchart showing an example of the operation of the second embodiment shown in FIG. 10;

FIG. 13 is a diagram illustrating an example of the relationship between pixels and sub-pixels of a CRT.

FIG. 14 is a diagram illustrating an example of the relationship between pixels and sub-pixels of a liquid crystal display.

FIG. 15 is a diagram showing an example in which an image of display data generated by a conventional device is projected on a liquid crystal display.

FIG. 16 is a diagram of another example in which an image of display data generated by a conventional device is projected on a liquid crystal display.

FIG. 17 is a diagram of still another example in which an image of display data generated by a conventional device is projected on a liquid crystal display.

[Explanation of symbols]

 10, 50 Input means 12 Image memory 14, 22 Comparison means 16, 18, 52, 54 Calculation means 20 Subtraction means 24 Frame memory 26 Liquid crystal drive means 28 Liquid crystal display 30, 56 Control means

Claims (11)

[Claims] 1. A first, second, and second pixels arranged in a two-dimensional manner in an X (horizontal) direction and a Y (vertical) direction, and each of the two-dimensionally arranged pixels has a different color. In a device for generating display data to be displayed on a display of a display device comprising a third sub-pixel, the device comprises a predetermined function x = F (Y) and a vertical coordinate value Y of a starting point of the function. It receives the coordinate value element Y _e longitudinal _s and an end point, the received coordinate values
Y _s and compares the coordinate values Y _e, function coordinate values Y _s in the comparison has finished generating process of the display data when the coordinate value Y _e is large, and when small receiving the x = F (Y) and a first comparison means for outputting a coordinate value Y _s, receives the function x = F (Y) and the coordinate values Y _s from the comparison means of said 1, Y of the received F (Y) first calculation means laterally seeking the coordinates x _s, and outputs the coordinate values Y _s and the coordinate values x _s determined that received said to be originally displayed at Y _s by substituting the line Y _s in, the receiving the coordinate values Y _s and the coordinate values x _s from the first calculating means,
The received coordinate value x _s is rounded down to the nearest whole number and the coordinate value x _s
The outputs seeking integer coordinate values X _s, the received coordinate values Y _s and the calculated coordinate values the two-dimensional shape to the coordinate values of pixels arranged corresponding to intersections of X _s (X _s, Y _s)
A second calculating means for forming the display data of the first, second and third sub-pixels, and a display of the first, second and third sub-pixels formed by the second calculating means Data is the coordinate value of the pixel
Storage means for accumulating address values based on the coordinate values of the first, second and third sub-pixels of (X _s , Y _s ); and the coordinate value x _s output from the first arithmetic means. second subtraction means for obtaining a value of x _s -X _s by subtracting the coordinate value X _s that is output from the operation means, one subpixel of x _s -X _s values the subpixel obtained by the subtraction means Is determined to be smaller than the width of the sub-pixel, and if the width is larger than one sub-pixel in the determination, whether the width is larger than the width of one sub-pixel of the sub-pixel is smaller than the width of two sub-pixels And a control means connected to the second comparison means for controlling the storage means, the control means comprising: x _s -X from the second comparison means. If the value of _s is an indication that less than a width of one subpixel, the The display data of the first, second, and third sub-pixels stored in the storage means are kept at the stored address value, and the width is larger than one sub-pixel and smaller than two sub-pixels. If it is indicated, the display data of the second and third sub-pixels is kept at the stored address value, and the display data of the first sub-pixel is read out and the coordinate value of the pixel ( X _s , Y _s ) are stored in the address value based on the coordinate value of the first sub-pixel of the coordinate value of the pixel on the right of the right-hand side, and indicate that the coordinate value is larger than the width of the two sub-pixels. The display data of the third sub-pixel is kept at the stored address value, and the display data of the first and second sub-pixels are read out and the pixel data is read out. A display data generation device for accumulating an address value based on the coordinate values of the first and second sub-pixels of the coordinate value of the pixel on the right of the coordinate value (X _s , Y _s ). 2. The display data generating device according to claim 1, wherein the device further receives a vertical coordinate value Y _s of a start point of the function, and adds 1 to the received coordinate value Y _s. an adding means for obtaining coordinate values Y _s +1, said adding means, sending a coordinate value Y _s +1 was該得instead of the coordinate values Y _s inputted to the first comparison means An apparatus for generating display data as a feature. 3. The display data generation device according to claim 1, wherein the display data generation device further receives display data from the storage device, receives a control signal from the control device, and displays the received display data. An apparatus for generating display data, comprising driving means for forming a signal necessary for display on the display device from data and a control signal. 4. The display data generation device according to claim 1, wherein the display device is a liquid crystal display, and the first, second, and third sub-pixels are first, second, and third sub-pixels. The second and third sub-pixels are arranged in a vertical stripe in this order, and the first sub-pixel is R
(Red), the second sub-pixel is G (green), and the third sub-pixel is B (blue). 5. The image display device is configured to be arranged two-dimensionally in an X (horizontal) direction and a Y (vertical) direction, and each of the two-dimensionally arranged pixels has a first, a second, and a different color. In a method for generating display data to be displayed on a display of a display device comprising a third sub-pixel, the method comprises the steps of: first comparing means for determining a predetermined function x = F (Y) and a starting point of the function; receives the vertical coordinate values Y _s and vertical end point coordinate values Y _e, compares the coordinate values Y _s and the coordinate values Y _e which receives the coordinate values Y _s coordinate value Y _e in the comparison Exit generation processing of the display data if large, and when smaller output function x = F (Y) and the coordinate values Y _s which receives said first calculating means first comparison means from receiving the function x = F (Y) and the coordinate values Y _s, the received F in the lateral direction to be originally displayed by substituting Y _s in the line Y _s to Y of (Y) Determine the coordinate value x _s,
And outputs coordinate values Y _s and the coordinate values x _s determined that received the second calculation means receives the coordinate values Y _s and the coordinate values x _s from the first computing means, the received coordinate values x _s truncate fewer or less, and outputs seeking coordinate values X _s that is an integer of the coordinate value x _s, the received coordinate values Y _s and the calculated coordinate value X _s
The two-dimensionally coordinate values of pixels arranged to the intersection of the corresponding (X _s, Y _s) of the first, to form the display data of the second and third sub-pixel, the storage means and the second The first and the second formed by the arithmetic means
And display data of the third sub-pixel are stored in an address value based on the coordinate values of the first, second and third sub-pixels of the coordinate value (X _s , Y _s ) of the pixel. 1 coordinate values X _s by subtracting the x _s -X _s output from the second arithmetic unit from the coordinate values x _s outputted from the arithmetic means
The second comparing means determines whether or not the value of x _s -X _s obtained by the subtracting means is smaller than the width of one sub-pixel of the sub-pixel. If it is larger, it is determined whether the width is larger than the width of one sub-pixel of the sub-pixel and smaller than the width of two sub-pixels, and the control means determines x _s -X _s from the second comparison means. Is received, the display data of the first, second, and third sub-pixels stored in the storage means is not limited to the stored address value. And receiving information indicating that the width is larger than the width of one subpixel and smaller than the width of two subpixels, the display data of the second and third subpixels is not limited to the stored address value. Together with First
Is read out and stored in the address value based on the coordinate value of the first sub-pixel of the coordinate value of the pixel on the right of the coordinate value (X _s , Y _s ) of the pixel, and 2 sub-pixels Is received, the display data of the third sub-pixel is kept at the stored address value, and the display data of the first and second sub-pixels are read out. A method of generating display data, comprising accumulating an address value based on the coordinate values of the first and second sub-pixels of the coordinate value of the pixel on the right of the coordinate value (X _s , Y _s ) of the pixel. 6. The display data generation method according to claim 5, wherein the display device is a liquid crystal display, and the first, second, and third sub-pixels are first, second, and third sub-pixels.
Arranged in a vertical stripe shape in the order of the third sub-pixels,
The first sub-pixel is R (red), the second sub-pixel is G (green), and the third sub-pixel is B
(Blue), a display data generation method. 7. A configuration in which two-dimensionally arranged pixels are arranged in a two-dimensional manner in an X (horizontal) direction and a Y (longitudinal) direction, and each of the two-dimensionally arranged pixels has a different color. In a device for generating display data to be displayed on a display of a display device including a third sub-pixel, the device includes a coordinate value (X) of a point designated by a pointing device.
_p, received a Y _p), the received coordinate values (X _p, the coordinates X _p of Y _p) x =
Seeking _{X p · (X e / X} pe) coordinate value x in the horizontal direction to be originally displayed at the X-coordinate value is substituted into _p X _p of the received coordinate values (X _p,
The coordinate values Y _p of _{Y p) y = Y p ·} (Y e / Y pe coordinate value is substituted into Y _p) of
Obtains a coordinate value y in the vertical direction to be originally displayed at Y _p, it has a first calculating means for outputting coordinate values x and y obtained the said X _e from the leftmost in the coordinate of the display device pixel counting a number value in the rightmost, the Y _e is a number value in the lowermost counted from the uppermost end in the coordinate of the display device pixel, also the X _pe coordinates of the pointing device of pixels in a number value in the rightmost counted from the leftmost, the Y _e is a number value in the lowermost counted from the uppermost end in the coordinate of the pointing device of pixels, said apparatus further comprises a first Receiving the coordinate values x and y from the arithmetic means, rounding down the received coordinate value x to the nearest whole number, calculating and outputting an integer coordinate value X of the coordinate value x, Cut below a few Discarded, an integer coordinate value Y of the coordinate value y is obtained, and the coordinate value (X) of the two-dimensionally arranged pixel corresponding to the intersection of the obtained coordinate value X and the obtained coordinate value Y is obtained. , Y) of the first, second, and third sub-pixels to form the display data, and first, second, and third sub-pixels formed by the second operation means. The display data of a pixel is represented by the coordinate value of the pixel.
Storage means for accumulating an address value based on the coordinate values of the first, second and third sub-pixels of (X, Y); and the second value from the coordinate value x output from the first arithmetic means. Subtraction means for subtracting the coordinate value X output from the arithmetic means to obtain the value of xX; and determining whether the value of xX obtained by the subtraction means is smaller than the width of one subpixel of the subpixel. If the width is greater than one subpixel in the determination, comparing means for determining whether the width is greater than the width of one subpixel of the subpixel and less than the width of two subpixels; And control means for controlling the storage means, wherein when the value of xX from the comparison means indicates that the value of xX is smaller than the width of one sub-pixel,
The display data of the first, second and third sub-pixels stored in the storage means are kept at the stored address value, and the width is larger than one sub-pixel and smaller than two sub-pixels. In this case, the display data of the second and third sub-pixels is kept at the stored address value, and the display data of the first sub-pixel is read to obtain the coordinate value of the pixel. The first coordinate value of the pixel to the right of (X, Y)
Is stored in the address value based on the coordinate values of the sub-pixels, and if it indicates that the width is larger than the width of the two sub-pixels, the display data of the third sub-pixel is stored in the stored address value. And the display data of the first and second sub-pixels are read out and converted to the coordinate values of the first and second sub-pixels of the coordinate value of the pixel on the right of the coordinate value (X, Y) of the pixel. A display data generation apparatus, wherein the display data is stored in an address value based on the display data. 8. The display data generating apparatus according to claim 7, wherein said apparatus further receives display data from said storage means, receives a control signal from said control means, and receives said display data and control signal. A driving unit for generating a signal necessary for displaying on the display device from the display device. 9. The display data generation device according to claim 7, wherein the display device is a liquid crystal display, and the first, second, and third sub-pixels are first, second, and third sub-pixels. The third sub-pixels are arranged in a vertical stripe in the order, the first sub-pixel is R (red), the second sub-pixel is G (green), and the third sub-pixel is B (Blue) A display data generation device characterized in that: 10. The image display device is arranged and arranged in a two-dimensional manner in an X (horizontal) direction and a Y (longitudinal) direction, and each of the pixels arranged in the two-dimensional manner has a first, a second, and a different color. In a method for generating display data displayed on a display of a display device including a third sub-pixel,
In the method, the first calculating means receives coordinate values (X _p , Y _p ) of a point designated by the pointing device, and receives the received coordinate values (X _p ,
The coordinates X _p of Y _p) determined the expression _{x = X p · (X e} / X pe coordinate value x in the horizontal direction to be originally displayed at the X-coordinate value is substituted into _p X _p in),
The coordinate value Y _p of the received coordinate value (X _p , Y _p ) is calculated by the formula y = Y _p · (Y _e / Y _pe )
Obtains a coordinate value y in the vertical direction to be originally displayed at the Y-coordinate value is substituted into _p Y _p of, and outputs coordinate values x and y obtained the said X _e is leftmost in the coordinate of the display device pixel from a number value in the rightmost counted, the Y _e is a number value in the lowermost counted from the uppermost end in the coordinate of the display device pixel, also the X _pe is the pointing device of pixels counted from the leftmost in the coordinate is the number value in the rightmost, the Y _e is a number value in the lowermost counted from the uppermost end in the coordinate of the pointing device of the pixel, the second calculating means first Coordinate values x and y
Receiving the coordinate value x, rounding down the decimal value of the coordinate value x, calculating and outputting the integer coordinate value X of the coordinate value x, and rounding down the decimal point of the received coordinate value y, An integer coordinate value Y of the value y is obtained, and the coordinate values (X, Y) of the two-dimensionally arranged pixels corresponding to the intersection of the obtained coordinate value X and the obtained coordinate value Y are The display data of the first, second and third sub-pixels is formed, and the storage means stores the first, second and third sub-pixels formed by the second calculation means
And display data of the third sub-pixel are stored in an address value based on the coordinate values of the first, second and third sub-pixels of the coordinate value (X, Y) of the pixel, The value of xX is obtained by subtracting the coordinate value X output from the second operation means from the coordinate value x output from the operation means, and the value of xX obtained by the subtraction means is one subpixel of the subpixel. Is determined to be smaller than the width of the sub-pixel, and if the width is larger than one sub-pixel in the determination, whether the width is larger than the width of one sub-pixel of the sub-pixel is smaller than the width of two sub-pixels When the control means receives from the comparing means information indicating that the value of xX is smaller than the width of one subpixel, the control means stores the first, second, and third subpixels stored in the storage means. The display data of Allowed to remain on a product address value,
If information indicating that the width is larger than the width of one subpixel and smaller than the width of two subpixels is received, the second
And the display data of the third sub-pixel is kept at the stored address value, and the display data of the first sub-pixel is read to obtain the coordinate value of the pixel.
When the coordinate value of the pixel on the right side of (X, Y) is stored in the address value based on the coordinate value of the first subpixel, and when information indicating that the coordinate value is larger than the width of two subpixels is received, The display data of the third sub-pixel is kept at the stored address value, the display data of the first and second sub-pixels is read out, and the display data of the pixel to the right of the coordinate value (X, Y) of the pixel is read out. A method of generating display data, comprising accumulating coordinate values at address values based on the coordinate values of first and second sub-pixels. 11. The method according to claim 10, wherein the display device is a liquid crystal display, and the first, second, and third sub-pixels are first, second, and third sub-pixels.
The first and second sub-pixels are arranged in a vertical stripe in the order of the second sub-pixel and the first sub-pixel is R (red).
Wherein the sub-pixel is G (green) and the third sub-pixel is B (blue).