JP3355662B2 - FL tube display device and FL tube display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an FL tube display system for displaying graphic data on a fluorescent display (FL) tube, and more particularly, to a triple anode FL tube display for displaying graphic data on a triple anode FL tube. The present invention relates to an apparatus and a method thereof.

[0002]

2. Description of the Related Art FL tubes are currently used not only for displaying characters but also for displaying graphics in sound reproducing devices and the like. The FL tube is a dual-wire FL.
A tube and a triple anode type FL tube are known, and a dual wire type FL tube is easy to operate, but has a poor mass productivity, and a triple anode type FL tube is shown in FIG.
8 and the duty cycle as described below with reference to FIG.
The cycle can be increased, high brightness can be obtained, and mass production is excellent, but there are advantages and disadvantages such as difficulty in operation .

FIG . 8 shows a configuration diagram of a triple anode type FL tube.
FIG. 9 shows an example of a driving waveform of the driver.
The figure is shown. Referring to FIG. 8, the structure of a triple anode type FL tube is shown.
I will explain the result. Defined by the opposing anode and grid
The 〇 portion defines one pixel. One grid
For example, each line in the horizontal direction on the A grid is 2 per line
Pixels are defined side by side, and two aligned pixels are
Are defined in n stages. Therefore, 2 ×
It defines n pixels. One anode is horizontal (line
3), the grid is opposed to the grid every three pixels. And
For example, the first anode is an anode facing the A grid.
A ₁₁ , anode A ₄₁ facing the B grid , not shown
Located opposite the anode A _71, which faces the D grid
These anodes are the first row of anode drive lines
It is driven by S _1. The second anode is an A-grid.
Anode ₂₁ facing the anode and anode facing the C grid
Over de A _51, not shown D grid facing the anode A
₈₁ and these anodes are in the second row
Driven by anode drive line S ₂ eyes. Third A
The nodes are anodes A ₃₁ and C grid facing the grid B.
A ₆₁ facing the pad and an E grid (not shown)
Opposed to the anode A ₈₁ which faces located, these
Anode drive the anode driving lines S ₃ of the third row of
Be moved. The triple anode type FL tube is
In each of a plurality of grids, 2 (pieces / line) × n
(Row) pixels are defined, and three kinds of anodes are arranged in the column direction.
Are arranged every three pixels to define a pixel.

Referring to the timing chart of FIG.
The driving method of the FL-type FL tube will be described. 1 of 1 grid
Since two pixels are lit in a line,
The driver activates one grid twice in succession,
The next time activates the next grid. Anode driver
Is the drive timing of the grid by the grid driver
The anode corresponding to the pixel to be lit
Drive. However, the same grid, for example, grid
A, two adjacent anodes facing A
Driving and over de A ₁₁ and A ₂₁ at the same time, two adjacent
Whether leakage current occurs between grids and brightness decreases
And preferably two adjacent grids facing the same grid
Are not driven simultaneously. In the example illustrated in FIG.
Is the first time the first grid 1G is driven once,
The anode drive line S ₁ in the first column for activating the mode A ₁₁ is
Drive. Next, activate the first grid 1G for the second time
And activated the second grid 2G for the first time
The second row of anode drive lines to activate anode A ₂₁
And S _2, drive the anode of the third column to activate the anode A ₃₁
Driving the flow line S _3. In this case _{, the} anode A ₂₁ and _the anode
The The over de A ₃₁ 1 grid 1G and second grids 2G and different
Therefore, two anodes A ₂₁ and A ₃₁ are activated simultaneously.
The above problem does not occur even if the process is activated. In the same way, it should be turned on.
Pixel, ie, grid according to display image data
And activate the anode. Thus, Mie Annault
The driving method (operating method) of the FL-type FL tube is complicated. So
On the other hand, the triple anode type FL tube has a duty cycle
There is an advantage that the size can be increased and high luminance can be obtained.

[0005] In the consumer products, such as a sound reproduction device, bright
The high degree of cost and low price are important factors for adoption, and from this point of view, a triple anode type FL tube is used, which is excellent in mass production while premising on difficulty in operability (driving method). Have been.

[0006] When displaying the FL tube, the original display data, scrolling, in order to easily allow the data processing for the other display, often stored in a standard two-dimensional state. When driving the FL tube triple anode scheme, the display data arranged two-dimensionally, 7 and
It is necessary to convert according to the arrangement of the driver for driving the triple anode and the driving method described with reference to FIG .
As the conversion method, a method of processing by a program using a microcomputer and a method of using a dedicated hardware circuit for conversion are conventionally known.

[0007]

For example, when driving a triple anode type FL tube having a size of about 24 dots × 96 dots, as shown in FIG.
96/2 = 48 Y directions
It is necessary to periodically drive the respective (grid) driver about 200 [mu] s, 1 if the word is used about 8 bits of relatively low-performance microcomputer, takes about 300μs as driving processing time, the performance of
There is a problem that sufficient followability cannot be ensured with a microcomputer . A demand for price reduction imposed on sound reproduction apparatus of civilian goods, it is difficult to use a sufficiently high performance high price My <br/> black Computer, also tentatively such high-performance microcomputer When used, various man-machine communication processes and other control processes need to be performed in addition to the display control of the FL tube. Therefore, even if a high-performance microcomputer is used, the display control of the FL tube is required. the only problem that can not be dedicated to the micro-computer occurs.

When realized by a dedicated hardware circuit, there is no problem of the processing speed described above. However, when the driver control is performed by a dedicated hardware circuit, see Fig. 8
Circuit for performing the driving process described with reference to FIG.
As a result, the price of dedicated hardware circuits increases, and the low price imposed on consumer products cannot be satisfied.

Accordingly, an object of the present invention is to provide an FL tube display system which can display and control a triple anode type FL tube at a low cost and with a sufficient processing speed.

[0010]

[Means for solving the problems] To solve the above-mentioned problems,
In order to achieve the above object, according to a first aspect of the present invention, a plurality of grids and a plurality of anodes are provided, and each of the plurality of grids has a number of 2 (pieces / line) × n (stages). Pixels in the direction of multiple grid lines,
A triple anode FL tube, in which three kinds of anodes are arranged every third one, is driven successively twice on each grid in sequence, activating the next grid for the second time and using the same grid.
In the direction of the plurality of grid lines
In the FL tube display device, display images arranged two-dimensionally in a memory in the FL tube display device, wherein the corresponding anodes are activated in accordance with the activation of the grid based on the display data under the condition that the contacting anodes are not activated simultaneously. Conversion for converting data into drive data suitable for driving a grid driver and an anode driver for activating the grid and the anode, which are defined by an arrangement relationship between the grid and the anode of the triple anode type FL tube and a driving method. The data conversion table in which basic data is stored and the data in the corresponding data conversion table are indexed by using the display image data, and the indexed data is synthesized to cooperate with the grid driver. Indexing means for generating data for driving the anode driver which operates Control means for driving the anode driver based on data indexed by the table indexing means in accordance with the driving of the grid driver and the driving timing of the grid driver. An apparatus is provided.

According to a second aspect of the present invention, a plurality of grids and a plurality of anodes are provided, and each grid of the plurality of grids has 2 (number / line) × n (stage) pixels. A triple anode type FL in which three types of anodes are arranged at intervals of three in the line direction of a plurality of grids.
The tube is driven successively twice on each grid, activating the next grid the second time and facing the same grid.
And an adjacent antenna in the plurality of grid line directions.
In the FL tube display method, the display image data arranged two-dimensionally in the memory, in which the corresponding anode is activated in accordance with the activation of the grid based on the display data under the condition that the code is not simultaneously activated. For converting the grid and anode of the triple anode type FL tube into driving data suitable for driving the grid driver and the anode driver defined by the arrangement relationship and driving method of the grid and the anode. Preparing a data conversion table in which data is stored, indexing data in the corresponding data conversion table using the display image data, synthesizing the indexed data, and cooperating with the grid driver; And generates data for driving the anode driver operating in accordance with the indexed data. Stomach the anode driver to cooperate with the grid driver driving control, characterized in that, FL tube display method is provided.

[0012]

In the FL tube display device, the grid is activated in advance.
The data you activate anode correspondingly, a plurality of tables having the conversion data can be uniquely determined by the display image data at that time is stored in. The table index (table lookup) means is driven at that time
A corresponding table is selected from a plurality of tables corresponding to the anode driver, and a table index (table lookup) is performed using the display image data at that time as a table lookup address. A grid that is sequentially driven by combining the table lookup data
The data is synthesized as drive data of the anode driver that is driven in response to the drive of the driver. In the FL tube display device of the present invention, the data for driving the anode driver can be obtained only by performing a table lookup on the table prepared in advance with the display image data at that time without performing complicated signal processing. data for driving the anode Dora <br/> driver from use image data can be obtained quickly.

[0013]

FIG. 1 is a block diagram showing an embodiment of an FL tube display device according to the present invention. The FL tube display device includes a controller 1, a display data memory 3, an X-direction (anode) driver 5, a Y-direction (grid) driver 7, and a triple anode FL tube 10. The control means of the present invention
All the controllers 1 perform a data conversion process and a display control process described later. The display data memory 3 stores the display data in a two-dimensional manner as shown in FIG.
(I, j) in FIG. 2 indicates a two-dimensional coordinate position of a pixel defined in the x direction and the y direction. For example,
(0, 0) indicates the position where the display data of the pixel at the position of 0 in the x direction and 0 in the y direction is stored, and (23, 9).
5) indicates the position where the display data of the pixel at the position of 23 in the x direction and 95 in the y direction is stored. In this example, the triple anode FL tube 10 has 24 dots in the X direction and 96 dots in the Y direction. Therefore, the display data memory 3 stores image display data of 24 dots in the x direction and 96 dots in the y direction in a two-dimensional manner.

FIG. 3 shows an X-direction (anode) driver 5 and
And driven by a Y-direction (grid) driver 7
That, anode and grid triple anode type FL tube 10
Fig. 2 illustrates a part of the arrangement . The illustration of FIG. 3 is illustrated in FIG.
The configuration is substantially the same as that of the anode and grid.
You. In FIG. 3, one line, for example, the first line
Are respectively driven by the anode drive lines 1a, 1b, 1c.
Of the three types of anodes (1a, 1b, 1c)
In FIG. 8, the anode drive lines S ₁ , S
₂ , anodes (A ₁₁ , A ₂₁ , A ₃₁ ) driven by S ₃ ,
(A ₄₁ , A ₅₁ , A ₆₁ )
Are different. Below the square frame showing the anode of FIG.
The notation of the anode is shown in accordance with the illustration of FIG. X direction (A
Ano triple anode type FL tube 10 at node) driver 5
Drives over de, drives the grid triple anode type FL tube 10 in the Y direction (grid) driver 7. One pixel is defined by the grid and the anode arranged opposite to each other, and the pixel portion at the position defined by the activated grid and the activated anode emits fluorescent light.

One grid faces 24 lines × 2 (pieces / line) of anodes. Triple anode FL
Since a tube 10, as illustrated in FIG. 3, each line Nitsu
In this case, three kinds of anodes are arranged repeatedly every three . For example, in the first line, an anode group consisting of three types of anodes 1a, 1b,
3 = 32 groups are provided . Below, it is the same. For example <br/>, A grid and anode 1 driver X0 is connected
a (A ₁₁ ) is activated and the triple anode FL tube 1
When the pixel at the (0,0) position in 0 emits fluorescent light and the A grid and the anode 1b (A ₂₁ ) are activated, the pixel at the (0,1) position in the triple anode FL tube 10 becomes fluorescent. Emits light. Since two anodes for each line are arranged to face one grid, the Y direction for activating the grid
If there are 96 pixels in the X direction of the triple anode FL tube 10, the number of (grid) drivers 7 is 96/2 = 48, which is half of 96 dots. In this illustration, 48 drivers X0, X2, X4 ~X96 (number is an even number) has been provided. In addition, triple anode type FL
When the number of drivers 5 in the X direction (anode) of the tube 10 is 24 dots in the Y direction, 24 × 3 = 72.

[0016]FIG. 9 shows the first inside of the triple anode FL tube 10.
A grid for emitting all pixels in a line and
FIG. 4 is a timing chart showing an anode activation process.
(1)Y direction (grid) driver 7DoLiver X0
A gridFirst timeWhile activating, At the same time, in the X direction
(Anode) Driver 5And the anode (1a(A ₁₁ ))
Activate (0,0)ofDisplay the pixel at the position,
(2) DoActivate grid A for the second time with driver X2,
In addition, the driver X4 activates the B grid for the first time,
At the same time, the anode (1b(A _{twenty one} ), 1c(A ₃₁ ))
Let it become (0,1), (0,2)Display pixel at position
Let it. (3)Hereinafter, the same operation is performed.

As described above, the Y-direction (grid) driver
7 activates each grid twice consecutively, and twice
When the grid of the eye is activated, the first grid of the next grid
Are simultaneously activated. However, the first group of each line
The first time of the lid and the second time of the last grid are simultaneous
Since there is no active grid, two grids
The lid is not activated. As described above, the Y direction (grid
) Each grid is sequentially chronologically sorted using the driver 7.
Twice, two grids at the same time, and to the next grid
It is shifted and driven, and it corresponds to the activated grid.
The X-direction (anode) driver according to the display data
The anode is activated by Iva5. In addition, one
Simultaneously driving adjacent anodes in the grid of
Refer to FIG. 9 because the display quality of the pixels in the grid deteriorates due to current leakage between adjacent anodes in the grid .
As described above, it is preferable that adjacent grids are adjacent in one grid.
It is desirable not to drive the anodes simultaneously
New

The display image data stored in the display data memory 3 is stored two-dimensionally in correspondence with the two-dimensional arrangement of the pixels of the triple anode FL tube 10 as illustrated in FIG. ing. That is, the display data memory 3
Does not correspond to the above-described arrangement of the triple-anode driver, and the display data is stored in an ordinary two-dimensional arrangement. The reason for this is to facilitate the processing of the data stored in the display data memory 3 when performing scroll processing of display data and other processing on the application program operating on the host computer (not shown). Therefore, the display data stored in the display data memory 3 is transferred to the X-direction (anode) driver 5 and the Y-direction
In order to display a desired pixel (dot) in the triple anode FL tube 10 via the (grid) driver 7, the display data stored in the display data memory 3 is
The above arrangement of the grid and anode (or the above driving order)
It is necessary to convert or replace according to.

[0019] Conventionally, facing the display data when converting the data for the Y-direction driver driving, if such turn on its adjacent pixels to check the contents of the display data within a grid microcomputer Adjacent to
Anode at the same time the condition that not driven based on that, X
In order to drive the direction (anode) driver 5 appropriately, it is necessary to convert image display data. However, the judgment process takes a lot of time, for example, 24 hours.
Although the time for driving one driver of the x96 dot triple anode FL tube 10 is within 200 μs, it takes about 300 μs, for example, and the driving specification may not be satisfied. Also, if the display data is replaced by a dedicated hardware circuit to satisfy the above drive specifications, the dedicated hardware circuit becomes very complicated, and a very expensive dedicated hardware circuit is required.

In the embodiment of the present invention, in order to solve the above-mentioned problem, as described above, the Y direction (grid)
The driver 7 successively repeats twice for one grid.
Activation and during the second activation of the grid
Is an element of the condition to perform the first activation of the next grid
Then, the controller 1 drives an X-direction (anode) driver 5 that converts display data that uniquely satisfies the above-mentioned requirements and activates the anode by a table lookup (table index) method described below. A method is used in which data is generated and the X direction (anode) driver 5 is driven by the data to activate the anode in accordance with the activation of the grid . Furthermore, in this embodiment,
In this case, as described above, two adjacent grids in one grid
In this method, the anodes are not activated simultaneously.

[0021] Figure 5 is illustrates the processing for driving the triple anode type FL tube 10 based on the display data Furochi
It is a chart . That is, FIG.
Is a flowchart showing data conversion processing of the control program.
is there. This conversion process is a 24x96 dot triple anode
The processing for the expression FL tube 10 will be described. FIG. 6 shows a data arrangement in the memory 3 in which the display data shown in FIG. 1 is stored two-dimensionally. FIG. 6 shows display data stored in a two-dimensional manner at 24.times.96 dots, two columns in the X-direction, one byte (8 bits) at a time, for a total of two bytes, for example, one byte each , two bytes of Y0 data. Y
FIG. 5 is a diagram illustrating that one data is read and converted to data for driving a Y-direction driver for activating an anode. In other words, the grid sequentially activated grid
When driving driver, anode corresponding to the grid
2 bytes of Y0 data and Y1 data for activating the mode are read from the memory 3 and are used to drive the X-direction (anode) driver 5 for activating the node by the conversion described later . generates data, then each one byte <br/> bets, total 2 bytes of Y2 data, converts the Y3 data generates data for driving the Y-direction driver, further, each of 1 byte, total 2 Y4 data of byte , Y
5 data is converted to generate data for driving the Y-direction driver. In the present embodiment, the reason for handling data for each byte is that data processing of the computer is usually performed in units of at least one byte (8 bits) . Hereinafter, likewise, it will convert the data of the order to that drive the driver X2.

According to the inventors' consideration, FIG.
As described above, the relationship between the grid to be activated and the anode
As a result of arranging the patterns to be masked,
Screen patterns MP1 to MP3.
The pattern was found to repeat. So, three kinds of
It is summarized in a mask pattern. Three types of mask patterns
First, three types of tables (A to C) 1 shown in FIG.
01, 102 and 103 are prepared in the controller 1.
Was. Each of the tables (A to C) stores the 8-bit display data.
All the anode drive data are stored. But
Therefore, the size of each of the tables A to C is 256 bytes.
You. As illustrated in FIG. 4, the relationship between the grid and the anode
Entities are prescribed. Therefore, referring to FIG.
To determine which mask pattern to use in order.
It is determined according to the activation state of the lid and the display data. You
That is, three types of tables are used properly according to the display data.
To activate each table by table lookup.
And read the data from the anode
The anode to be synthesized and activated is determined.

Referring to the flowchart shown in FIG.
The data conversion processing operation in the controller 1 will be described. Step S01 : The control program in the controller 1 sets an index X for managing the processing of the Y-direction (grid) driver 7 to an initial value X = 0. Step S02 : The control program uses this index X
Drives the Y-direction (grid) driver 7 based on
First it is activated once the A grid, since the next time, be continuous
Activate the two grids. Each grid is continuous twice
Activated and remove the first and last grid
The first and second times for two consecutive grids
Are activated at the same time. Step S03 : The control program is in the X direction (anode)
The index Y for managing the processing of the driver 5 is set to the initial value Y.
= 0. Step S04 : The control program reads display (image) data in the display data memory 3 specified by the index X and the index Y.
When the index is X = 0 and Y = 0, the 2-byte display data of 1 byte (8 bits) Y0 and Y1 shown in the upper left corner of FIG. 6 corresponding to the pixel at the (0,0) position.
Data is read. The reason why the display data of Y0 and Y1 are simultaneously read out is as described later.
This is because one display data can use the same conversion table, and the timing for driving the Y-direction driver matches. Also, each line and anode are separated by 3
Are arranged, and three anodes are used for 8-bit data.
Can not be separated according to, activate two grids at the same time
The display data spans 2 bytes (16 bits)
Sometimes. Therefore, the controller 1 executes step 0
As shown in 4 (S04), display of two consecutive bytes
Reads data from memory 3 and displays data unrelated to display.
Masking the X-direction (anode) driver 5
Output to activate the anode. Step S05 : The control program is shown in FIG. 4 and FIG.
With the illustrated method, the read data Y0 and Y1 are converted into data for driving the Y-direction driver.

This data conversion processing will be described with reference to FIG. Figure 7 is a diagram illustrating an example of converting the display by entering readings <br/> out from the memory 3 the data Y = 01010101 (binary notation) at step S04. Controller 1
In the table, three types of conversion tables 101, 102, and 103 are stored. The size of each of these conversion tables is 256 bytes. As described with reference to FIG.
Stipulates the relationship between the grid and the anode,
The mask pattern differs depending on the position of the grid. did
Therefore, it is possible to determine which mask pattern to use in order.
It is determined according to the activation state of the memory and the display data. In this example, the read display data Y = 001010101
Upper 2 bits = 01, intermediate 3 bits = 010, lower 3
The bits are divided into 101, and first to third conversion data Ya, Yb, and Yc are generated as described below. In FIG.
M indicates a bit to be masked.

In the present embodiment, as an example in which 8 bits are divided in a state close to being equally divided, the upper bits are set to 2 bits and the other bits are set to 3 bits. First to third conversion data Y
As described later, three conversion tables 101, 102, and 103 are used depending on whether the value (index X) of the X-direction driver is divisible by 3 as described later.
Is used as appropriate. First conversion data Ya: 8-bit first conversion data Ya = 010000000 by adding middle 3 bits = 000 and lower 3 bits = 000 binary data (000000) to upper 2 bits data (01) (Binary notation).
Second conversion data Yb: intermediate 3-bit data (01
0) and the lower three bits of data (000) are added to make the 6-bit second conversion data Yb = 00000 (in binary notation). Third conversion data Yc: The lower three bits of data (101) are set to three bits of third conversion data Yb = 101 (binary notation). These conversion data Ya, Yb, Yc are used as addresses when the conversion table is looked up in a table. Was
For example, 8-bit first conversion data Ya = 0100
Read data from table A with 0000 as address
When activated, it is activated corresponding to the upper two bits of data (01).
The anode to be converted is known. Tables 101, 102,
103 are therefore in binary notation at most (110
00000).

[0026] conversion table 101, 102 and 103, when an address the display data, FIG Oyo
As shown in FIG. 9 and FIG. 9 , according to the correspondence between the grid and the anode in the triple anode FL tube 10, the adjacent anode facing the same grid among the three consecutive anodes .
Two anodes can be simultaneously activated up to 2
Data for driving the Y driver to activate the individual anodes is stored. However, due to the repeating arrangement of the triple anode illustrated in FIG.
The conversion content when the value (index X) of the X-direction driver is divisible by 3 (3n), the conversion content when index X is not divisible by 3 and 1 is left (3n + 1), and 2 when index X is not divisible by 3 Since the conversion contents at the time of surplus (3n + 2) are different from each other, three types of tables 1
01, 102, and 103 are properly used.

The conversion algorithm according to the value (index X) of the X-direction driver is defined as follows, as shown in FIGS . When the value of the X-direction (anode) driver 5 is divisible by 3: 3n A (Ya) + B (Yb) + C (Yc) When the value of the X-direction (anode) driver 5 is not divisible by 3 and 1 remains: 3n + 1B ( Ya) + C (Yb) + A (Yc) When the value of the X direction (anode) driver 5 is not divisible by 3 and 2 remains: 3n + 2 C (Ya) + A (Yb) + B (Yc)

[0028] The meaning of the above algorithm, for example, A
When the value of the X-direction (anode) driver 5 for driving the node is divisible by 3 (3n), the first conversion data Y
a is used as an address of table 101 (table A) to perform a table lookup and read conversion data, and the second conversion data Yb is used as an address of table 102 (table B) to perform table lookup and perform conversion. It means reading data, using the third conversion data Yc as an address of the table 103 (table C) to look up the table to read the converted data, and looking up and reading these tables to synthesize the converted data. I do.

Similarly, in the case of (3n + 1), FIG.
The conversion data is read out by the method shown by the broken line in FIG. That is, the first conversion data Ya is used as an address of the table 102 (table B) to perform a table lookup to read the conversion data, and the second conversion data Yb is used as an address of the table 103 (table C). Then, the conversion data is read out by performing a table lookup, and the third conversion data Yc is stored in a table 101 (table A).
, The conversion data is read out by performing a table lookup, and the conversion data is synthesized by reading out the table lookup.

Also in the case of (3n + 2), the converted data is read out and synthesized by the same method as described above.

For example, when the index X = 0, the value of the X-direction driver (index X) is 3
(3n), and the conversion for driving the Y-direction driver for the first byte data Y0 in the display data memory 3 shown in FIG. 6 according to the algorithm illustrated in FIG. 7A. Data is obtained. Second
As for the byte data Y1, the converted data for driving the Y-direction driver is obtained in the same manner as described above. here,
Note that, as described above , one X-direction driver can drive two adjacent Y-direction drivers to drive two adjacent anodes simultaneously to drive two adjacent anodes. Therefore, from this condition, the conversion data read out by table lookup from the tables 101, 102, and 103 is 12-bit data including one extra 0 for every two bits for 8-bit pixel data. . That is, for example, anode 1
Since two anodes a, 1b, and 1c can be activated at the same time, two bits are "1" data, but the remaining one bit is "0", which is extra redundant data. Therefore, when an extra 4 redundant bits are added to the 8-bit pixel data, the total becomes 12 bits. The conversion data Y0 and Y1 each having 12 bits are converted data of 24 bits (3 bytes) in total. That is, the conversion data for driving the Y-direction driver for substantially 3 bytes is obtained from the conversion data Y0 and Y1 of 2 bytes.

Step S06 : The control program uses the 12-bit conversion data (total 24 bits) obtained as described above to drive the Y-direction driver.
(Bit) / 8 (Bit) = 3 bytes of data are combined, and the combined data is used to drive the Y-direction driver.
Thus, already A grid and the X-direction (anode) Dora which is activated by the driver X0 that is driven
The pixel at the intersection with the anode activated by the driving of the inverter 5 emits light. Step S07, S10: As illustrated in FIG. 5, the control program, in this example, the driver X0, Y
In the direction, the conversion data pairs Y2: Y3, Y4: Y5
It is determined whether or not the above-described conversion processing has been completed for
If the processing has not been completed, the Y-direction driver index Y is updated, and the processing in step S04 is repeated. The reading of the conversion data pair of 2 bytes in step S04 is performed, for example, as follows using the index X and the index Y in combination.

[0033]

[Table 1] Index X Index Y Conversion data pairs to be read 0 0 Y0, Y1 0 1 Y2, Y3 0 2 Y4, Y5

[0034] Step S08: When the data conversion process and the driving of the Y-direction driver for driver X0 is completed as described above, the control program to repeat the processing described above for the next driver X2, the index X 2 Just update. Step S09: the control program, the final driver X
It is determined whether or not the above-described processing has been completed up to 94, and if not, the processing is repeated from the processing in step S02. If the processing has been completed as described above to driver X94, the processing of the control program in the controller 1 temporarily ends. The control program in the controller 1 is interrupted at the next drive timing, and performs the above-described processing periodically.

According to the above-described embodiment, 24 dots x
For a triple-anode FL tube 10 having a size of 96 dots, the conversion processing time is determined in the X direction (ano
Mode ) Since the data defining the driving of the driver 5 is uniquely read from the tables 101 to 103, it takes about 80 μs per X-direction driver.
This conversion time sufficiently satisfies the driver driving condition of 200 μs. On the other hand, the conventional method of converting the data for driver while judging the contents of the data for conversion is:
300 μs when using the same microcomputer
It was about. That is, in the present embodiment using the table lookup method, driver driving data can be obtained at a very high speed as compared with the conventional method of determining and converting data contents. Shortening the conversion time according to this embodiment, a microcomputer other than the driving triple anode type FL tube 10 which drives the control program, the triple anode formula F
This means that it can be used for other processing of an apparatus such as an acoustic signal reproducing apparatus on which the L tube 10 is mounted, and has an effect that a dedicated microcomputer is not required for conversion processing. .

Further, by using a microcomputer used for controlling the apparatus such as the above-described acoustic signal reproducing apparatus, the drive processing of the triple anode FL tube 10 is performed, so that the exclusive use for driving the triple anode FL tube 10 is performed. Since a hardware circuit is not required, the price of a device such as an audio signal reproducing device can be reduced. The table lookup method of the present embodiment has an advantage that a complicated control program does not have to be created. Further, the table lookup method of the present embodiment has an advantage that even if the size of the triple anode FL tube 10 is different, it can be easily dealt with without recreating a control program.

In this embodiment, the display data memory 3
Has no interlock or interface with the application program that updates the content of Therefore, the application program arbitrarily updates the contents of the display data memory 3 according to its own processing contents. For example, the application program can independently update display data associated with, for example, scroll processing in the display data memory 3 based on a user request. That is, the application program can be created without being governed by the complicated drive control of the triple anode FL tube 10 as in the related art.

The present invention is not limited to the embodiment described above.
Various modifications can be made. For example, the X direction
(Anode) Driving order of driver 5 , Y direction (grid
D) The driving sequence of the driver 7 is not limited to the above-described sequence, but can be performed in an arbitrary sequence. Further, the present invention is not limited to the use of a microcomputer. Since the processing content of the control program using the microcomputer described above is a relatively simple sequence (order) processing, it can be realized by, for example, an ASIC or the like. At this time, the conversion table 10
1, 102 and 103 can be stored in a ROM connected to the ASIC.

[0039]

According to the present invention, in order to convert the data for driving the driver of the triple anode FL tube, a table look-up method is employed to convert the display image data arranged two-dimensionally into triple. Data conversion into data for operating a driver for driving the anode FL tube can be performed in a short time. Further, the FL tube display device of the present invention can easily cope with modification and change even if the size of the triple anode type FL tube is different. Further, when the present invention is applied, the price of a device equipped with a triple anode FL tube can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an FL tube display device of the present invention.

FIG. 2 is a diagram showing a two-dimensional storage form of a memory for storing display image data in FIG. 1;

FIG. 3 shows an X-direction driver and Y of the FL tube shown in FIG. 1;
It is a figure which shows a part of structure of a direction driver.

FIG. 4 is a diagram in which table conversion of the present invention is considered.

FIG. 5 is a flowchart showing a control operation in the controller shown in FIG.

FIG. 6 is a diagram illustrating processing of display data in the flowchart shown in FIG. 5;

FIG. 7 is a display image in the controller shown in FIG .
Illustrates a method of converting data for driver driving data from data
FIG.

FIG. 8 Grid and anode of triple anode type FL tube
FIG.

FIG. 9 shows the grid of the triple anode type FL tube illustrated in FIG .
Diagram showing an example of a method for activating a pad and an anode.
It is.

[Explanation of symbols]

1. Controller 3. Display data memory 5. X direction (anode) driver 7. Y direction (grid) driver 10. Triple anode FL tube

Claims (7)

(57) [Claims] A plurality of grids and a plurality of anodes, each of the plurality of grids being 2 (pieces / line) ×
A triple anode FL tube in which three (3) anodes are arranged at intervals of three in the line direction of a plurality of grids, defining n (stage) pixels, successively connecting each grid twice And activate the next grid for the second time, and move the plurality of grid lines facing the same grid.
That do not simultaneously activate adjacent anodes
In the FL tube display device, which activates the corresponding anode in accordance with the activation of the grid based on the display data, the display image data arranged two-dimensionally in the memory is
The conversion basic data for converting into the driving data suitable for driving the grid driver and the anode driver that activates the grid and the anode defined by the arrangement relationship between the grid and the anode of the triple anode type FL tube and the driving method is provided. The stored data conversion table and the data in the corresponding data conversion table are indexed using the display image data, and the indexed data is synthesized to operate in cooperation with the grid driver. Table indexing means for generating data for driving the anode driver; driving of the grid driver; and driving control of the anode driver based on data indexed by the table indexing means in accordance with the driving timing of the grid driver. Characterized by having control means To, F
L tube display. 2. The data conversion table comprises three types of conversion tables defined according to the arrangement of the grids and anodes in the triple anode type FL tube. The table indexing means uses the grid drive as a reference. Part of the data of the display image data is extracted so as to generate data for driving the anode selectively driven at that time, and the corresponding driver driving basic data is indexed from the data conversion table using the data. The FL tube display device according to claim 1. 3. The table look-up means inputs two sets of parallel image data for driving an anode into the display image data arranged two-dimensionally in the memory, and simultaneously inputs the two sets of data. The FL tube display device according to claim 2, wherein basic data for driving the anode driver is indexed from the conversion table based on display image data. 4. The FL tube display device according to claim 3, wherein said table indexing means indexes said conversion table using said input data as an address. 5. The table indexing means according to claim 1, wherein
The FL tube display device according to claim 4, wherein each set of data is indexed using the same conversion table. 6. The table indexing means according to claim 1, wherein:
6. The FL tube display device according to claim 5, wherein each set of data is divided into a plurality of blocks, and the converted data is accessed to index corresponding data by using the divided data as addresses. 7. A plurality of grids and a plurality of anodes, each grid of the plurality of grids being 2 (pieces / line) ×
A triple anode FL tube in which three (3) anodes are arranged at intervals of three in the line direction of a plurality of grids, defining n (stage) pixels, successively connecting each grid twice And activate the next grid for the second time, and move the plurality of grid lines facing the same grid.
That do not simultaneously activate adjacent anodes
In the FL tube display method, the corresponding anode is activated in accordance with the activation of the grid based on the display data, the display image data arranged two-dimensionally in the memory,
The conversion basic data for converting into the driving data suitable for driving the grid driver and the anode driver that activates the grid and the anode defined by the arrangement relationship between the grid and the anode of the triple anode type FL tube and the driving method is provided. prepares the data conversion table which is stored, before Symbol indexed data in the data conversion table corresponding with the image data for display, the grid driver and co by combining a plurality of data the index And generating drive data for driving the anode driver that operates in cooperation with the grid driver on the basis of the indexed data.