CN105551450B - A kind of segment liquid crystal display screen display drive method and device - Google Patents

Abstract

The invention discloses a kind of segment liquid crystal display screen display drive method and device, methods described to include：Assignment procedure, the first generation step, the second generation step, obtaining step, and actuation step.According to the display drive method and device of the segment liquid crystal display screen of the embodiment of the present invention, it can save to spend and read the time of the verification of the related control information of section-type LCD logic chart acquisition and display control above repeatedly, reduce the time of hand-coding macrodefinition and control program need not be write again, obtained information accuracy is high, portable also very high.

Description

Display driving method and device for a segment liquid crystal display

technical field

The invention relates to a display driving method and device, in particular to a segment liquid crystal display driving method and device.

Background technique

With the continuous development of electronic technology, a large number of portable intelligent electronic devices have been widely used and play an indispensable role in people's daily life. Most of such portable smart electronic devices (such as electronic sphygmomanometers, health scales, etc.) use relatively low-cost segment LCDs (liquid crystal displays) to display data such as blood pressure and weight. The current segment LCD itself does not have a driving circuit, nor does it have a display buffer, and it needs to be connected with an external driver chip with a display buffer to realize the display. In general, segment LCDs are specially customized according to the display requirements of some specific devices (such as electronic blood pressure monitors). Usually, there are hundreds of display segments on a segment LCD, and these display segments are divided into two categories, one is for displaying graphic symbols, one display segment corresponds to one graphic symbol; the other is for displaying character information, seven The display segment corresponds to one character. The display driving method for realizing such a segment LCD display is: find the control register for controlling the corresponding display segment according to the display position, and then assign values to the bits of the control register. For example, to display information such as "1" at the position of "9" in the LCD screen (starting from 0, counting from left to right, and from top to bottom), first find the control "" from the logic diagram of the segment LCD screen. 9" the control register at this position (assumed to be seg10_11), and then operate on the control register seg10_11. The display code corresponding to "1" is (SEG_B+SEG_C), assuming that SEG_B corresponds to BIT1, and SEG_C corresponds to BIT2, then the value of seg10_11 should be 0000 0110, and "1" can be displayed at the position "9" of the LCD screen. The specific implementation process is as follows: First, find out the control register (seg10_11) that controls the position of "9" by consulting the segment LCD logic diagram; then, convert the logical dot matrix (regardless of position) of the character to be displayed into a physical dot matrix (relative to the position); then, output the physical lattice (0000 0110) on this control register (seg10_11). The code written by the above method is related to the specific display position and display characters. When adding a new display character or replacing the LCD display, the code needs to be rewritten. Since a general segment LCD screen has dozens of graphic symbol segments and more than ten character segments, and each character segment needs to display up to 30 character information, this greatly increases the complexity of the code, which is not conducive to the code transplant.

It can be seen that in order to drive the display, it takes a lot of time to repeatedly consult the segment LCD logic diagram and control circuit diagram in order to obtain relevant control information and convert such control information into relevant codes, which seriously reduces work efficiency. The large number of display segments also makes errors prone to occur in the acquisition of control information, resulting in errors in display content. Moreover, the segment LCDs of electronic devices are replaced relatively frequently, and the workload of writing code after each replacement is extremely large.

In order to solve the above problems, there are also other different display driver solutions. However, none of them can solve the problems that it takes a lot of time to repeatedly read the segment LCD logic diagram to obtain relevant control information, check the display control, and write the driver code due to the huge amount of displayed information, and it is not very good in terms of transplantation. excellent.

Therefore, it is necessary to find a method that can well solve the above problems, thereby improving work efficiency and reducing product development cycle.

Contents of the invention

The object of the present invention is to provide a display driving method and device for a segment liquid crystal display in order to overcome the defects in the prior art. In order to realize this object, the technical scheme that the present invention takes is as follows.

According to the first aspect of the embodiments of the present invention, there is provided a display driving method for a segmented liquid crystal display, including: an assignment step for extracting each display segment information from the logic diagram of a segmented liquid crystal display, and giving each display The segment assigns two-dimensional coordinate values; the first generation step is used to generate the macro definition of the character segment control register, the mapping table index value and the mask and/or generate the macro definition of the graphic symbol segment control register, control bits and operation; the second The generating step is used to generate a header file containing the above-mentioned macro definition information, and the header file is added to the LCD display driver project; the obtaining step is used to obtain the information to be displayed; and the driving step is for the graphic symbol segment, Operate through the operation macro definition generated by the LCD electronic form to realize the display of graphic symbols; and/or for the character field, use the mapping table to convert the logical dot matrix of the character into a physical dot matrix to realize the character display.

According to yet another embodiment, the driving step further includes for the character segment: obtaining its index value in the character logic dot matrix table according to the ASCII code of the character; obtaining the character's index value in the character logic dot matrix mapping table according to the index value Logical dot matrix; obtain the character segment control register, mapping table index value, and mask through the character display position and physical segment relationship table; through the obtained character segment control register, mapping table index value, and mask, combine the character logical dot matrix to the physical Dot matrix mapping index table, convert the character logical dot matrix into physical dot matrix, and return the value after the character physical dot matrix mask; get the digital tube according to the obtained character segment mask and the value after the character physical dot matrix mask The value of each bit; and select the corresponding digital tube according to the information of the character segment control register, and realize the corresponding character display according to the obtained value of each bit.

According to yet another embodiment, optionally, in the step of assigning values, the rows of the logic diagram of the segmented liquid crystal display screen are used as the X-axis, and the columns are used as the Y-axis for assignment.

According to another embodiment, preferably, in the first generating step, for the XY coordinate value of the graphic symbol segment, the value of 4X+Y is used to round and modulo the number of digits of the control register respectively, so as to generate the The macro definition of the control register, control bit and operation related to the graphic symbol segment; and/or for the XY coordinate value of the character segment, use the value of 4X+Y to round and modulo the number of digits of the control register respectively to generate the character Macro definitions of segment-related control registers, mapping table index values, and masks.

According to another embodiment, optionally, in the second generating step, a header file containing macro definition information is generated by using a spreadsheet or a script.

According to the second aspect of the embodiment of the present invention, there is provided a display driving device for a segment liquid crystal display, including: an assignment module, used to extract information of each display segment from the logic diagram of a segment liquid crystal display, and assign each display segment The segment assigns two-dimensional coordinate values; the first generation module is used to generate the macro definition of the character segment control register, the mapping table index value and the mask and/or generate the macro definition of the graphic symbol segment control register, control bits and operation; the second The generation module is used to generate a header file containing the above-mentioned macro definition information, and the header file is added to the LCD display driver project; the acquisition module is used to obtain the information to be displayed; and the driver module, for the graphic symbol segment, Operate through the operation macro definition generated by the LCD electronic form or script to realize the display of graphic symbols; and/or for the character segment, use the mapping table to convert the logical dot matrix of the character into a physical dot matrix to realize the character display.

According to one embodiment, the drive module is configured to: for the character segment: obtain its index value in the character logic dot matrix table according to the ASCII code of the character; obtain the logic of the character in the character logic dot matrix mapping table according to the index value Dot matrix; obtain the character segment control register, mapping table index value, and mask through the character display position and physical segment relationship table; through the obtained character segment control register, mapping table index value, and mask, combine the character logical dot matrix to the physical point Array mapping index table, convert the character logical dot matrix into physical dot matrix, and return the value after the character physical dot matrix mask; according to the obtained character segment mask and the value after the character physical dot matrix mask, get the The value of each bit; and select the corresponding digital tube according to the information of the character field control register, and realize the corresponding character display according to the obtained value of each bit.

According to yet another embodiment, optionally, the assignment module assigns values by using the rows of the logic diagram of the segment liquid crystal display as the X axis and the columns as the Y axis.

According to another embodiment, it is preferred that the first generating module rounds and moduloes the number of digits of the control register through the value of 4X+Y for the XY coordinate value of the graphic symbol segment to generate the graphic symbol segment Related control registers, control bits, and macro definitions of operations; and/or for the XY coordinate values of the character field, use the value of 4X+Y to round and modulo the number of digits in the control register to generate the character field-related Macro definitions for control registers, mapping table index values, and masks.

According to yet another embodiment, optionally, the second generation module generates a header file containing macro definition information by using a spreadsheet or a script.

According to the display driving method and device of the segment-type liquid crystal display of the embodiment of the present invention, the time spent on repeatedly reading the segment-type LCD logic diagram to obtain relevant control information and verification of display control can be saved, and the time for manually writing macro definitions can be reduced. Moreover, the control program does not need to be rewritten, and the obtained information has high accuracy and high portability.

The present invention will be specifically described below with reference to the accompanying drawings and through embodiments, wherein the same or substantially the same components are indicated by the same reference numerals.

Description of drawings

FIG. 1 is a schematic flow chart of a display driving method for a segment liquid crystal display according to an embodiment of the present invention;

Figure 2 is a small segmental LCD logic diagram intercepted;

Fig. 3 is a logic diagram represented by a two-dimensional coordinate system;

4 is a schematic diagram of a display driving process of a segment liquid crystal display according to an embodiment of the present invention;

Fig. 5 shows the display segment information extracted according to the segment LCD logic diagram and assigned corresponding XY coordinates according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of a display driving device for a segment liquid crystal display according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a display driving device for a segment liquid crystal display according to another embodiment of the present invention.

Detailed ways

As shown in FIG. 1 , it is a schematic flowchart of a display driving method for a segment liquid crystal display according to an embodiment of the present invention, including: an assignment step 100, a first generation step 102, a second generation step 104, and an acquisition step 106. And drive step 108 . Wherein the assignment step 100 is used to extract each display segment information from the logic diagram of the segment type liquid crystal display, and assigns a two-dimensional coordinate value to each display segment; the first generation step 102 is used to generate a character segment control register, a mapping table index The macro definition of value and mask, and/or generate the macro definition of graphic symbol segment control register, control bit and operation; The second generation step 104 is used to generate the header file that contains above-mentioned macro definition information, add this header file to liquid crystal display In the engineering of the screen display drive; the acquisition step 106 is used to obtain the information to be displayed; and in the driving step 108, for the graphic symbol segment, the operation macro definition generated by the electronic form of the liquid crystal display is operated to realize the display of the graphic symbol , and/or for the character field, use the mapping table to convert the logical dot matrix of the character into a physical dot matrix, so as to realize the character display. The above-mentioned steps will be specifically described below through examples.

As shown in Figure 2, it is a small part of the segmented LCD logic diagram. A general segment LCD logic diagram consists of rows and columns, where the columns represent the ground (i.e. collinear), and the rows represent the upper or lower half of the control register. For example, SEG0 is the upper half of control register 0, and SEG1 is the lower half of control register 0. The corresponding control bits of the upper half are bit0 to bit3, and the corresponding control bits of the lower half are bit4 to bit7; The cell represents a specific display segment, for example, the display segment corresponding to COM0 and SEG0 is KPA.

The logic diagram of the segment LCD is represented by a two-dimensional coordinate system. In one embodiment, the rows can be represented by the X-axis, and the columns can be represented by the Y-axis, and the cells are points in the two-dimensional coordinate system. As shown in Figure 3, it is a logic diagram represented by a two-dimensional coordinate system, where the X axis runs from left to right, and the Y axis runs from top to bottom. If these points on the two-dimensional plane are transformed into points on the one-dimensional plane, then these points on the one-dimensional plane are equal to 4X+Y. The purpose of this is to convert the points of the two-dimensional plane into points in the one-dimensional plane, and correspond to the bit addresses in the program logic one by one, so that the control register and control register corresponding to each display segment can be calculated by using mathematical formulas. bit.

First judge whether the display segment belongs to a character segment or a graphic symbol segment. If it is a graphic symbol segment, then according to the XY coordinate value of the graphic symbol segment, the number of bits in the control register is rounded and moduloed by the value of 4X+Y respectively. In one embodiment, the number of bits in the control register is usually eight bit, then the value rounding and modulus of 4X+Y can be expressed as (4X+Y)/8 and (4X+Y)%8, so the control register and control bit information related to the graphic symbol segment are obtained, so that Quickly generate the macro definitions of control registers, control bits and operations related to the graphic symbol segment; if it is a character segment, according to the XY coordinate value of the character segment, the value of 4X+Y is rounded to 8 and moduloed, respectively, That is (4X+Y)/8 and (4X+Y)%8, to obtain the control register information related to the character segment, so as to quickly generate the macro definition of the control register, mapping table index value, and mask related to the character segment.

Through the above method, the corresponding control registers, control bits or masks of each display segment (including the character segment and graphic symbol segment) can be quickly obtained in batches. Type LCD logic diagram in order to manually obtain the required control registers, control bits or masks and other related information to realize the time on the display control.

As shown in Figure 4, according to an embodiment, the specific process may be as follows:

After starting (block 200 ), extract the information of each display segment of the segment type LCD from the logic diagram of the segment type LCD, and give each display segment an XY coordinate value (specifically as described above) (block 202 ).

Next, a determination is made as to whether the display segment is a character segment or a graphic symbol segment (block 204). If it is a character segment, generate the macro definition of the character segment control register, mapping table index value, and mask (box 206); if it is a graphic symbol segment, generate the macro definition of the graphic symbol segment control register, control bits and operations (box 208) .

Then, generate a header file containing the above-mentioned macro definition information, and add the header file into the LCD display driver project (block 210 ). In one embodiment, the tools used to generate the header file containing the above macro definition information include excel or script.

Next, acquire the information to be displayed (block 212 ), and determine whether the information to be displayed is a graphic symbol segment or a character segment (block 214 ). For the graphic symbol segment, operate through the operation macro definition generated by the LCD electronic form (box 216) to realize the display of the graphic symbol (box 218); for the character segment, the segment LCD display driver further includes: obtaining the character to be displayed and display position (box 220); according to the ASCII code of the character, obtain its index value (box 222) in the character logical lattice table; according to the index value, obtain the logical lattice of the character in the character logical lattice mapping table ( Box 224); Obtain the character segment control register, mapping table index value, and mask through the character display position and physical segment relationship table (box 226); through the obtained character segment control register, mapping table index value, and mask, combine the character The mapping index table from logical lattice to physical lattice converts the character logical lattice into physical lattice, and returns the value after the character physical lattice mask (box 228); according to the obtained character segment mask and character physical point Value after array mask, obtain the value of each bit in the nixie tube (box 230); select corresponding nixie tube according to the information of character field control register, and the value of each bit that obtains, realize corresponding character display (box 232 ). Then, the process ends (block 234).

As shown in Figure 5, the display segment information is extracted according to the segment LCD logic diagram, and the corresponding XY coordinates are assigned. The following takes this as an example to illustrate the specific application process of the display driving method according to the embodiment of the present invention.

Assuming that the display information of KPA is to be displayed, it is first judged whether it belongs to the graphic symbol segment or the character segment, which obviously belongs to the graphic symbol segment. Then, according to the processing of the graphical symbol segment, the following steps are performed:

(1) A number is obtained according to the formula 4X+Y, which is 0 in this example;

(2) Calculation of the control register: (4X+Y)/8=0 (round up to 8), and the control register is 0;

(3) Calculation of the control bit (bit): (4X+Y)%8=0 (modulo 8), and the bit is 0;

(4) Make a macro definition for the corresponding operation:

#define SET_KPA_VAL(n) { SEG_PORT_0.bit.bit0=(n);}

(5) Operation macro definition:

On: SET_KPA_VAL(1);

Off: SET_KPA_VAL(0);

(Here, for the relevant bit, set 1 to light up by default, set 0 to turn off, and deal with it according to the actual situation.)

In addition, it is assumed that the display information of "1" is to be displayed at the position of character segment 9 of the LCD screen (starting from 0, counting from left to right, and from top to bottom). First, judge whether it belongs to the graphic symbol segment or the character segment, and obviously belongs to the character segment, then perform the following steps according to the processing of the character segment:

(1) Obtain its index value in the character logic dot matrix table according to the ASCII value of "1", which is 1 in this example;

(2) Obtain the logical lattice in the logical lattice mapping table according to the index value 1: (LOGSEG_B+LOGSEG_C);

(3) Through the position information POS (9 in this example), the upper and lower half of the character segment control register, mapping table index value, and mask are obtained from the character display position and physical segment relationship table:

Upper half: SEG_CHR_9_UP_PORT, SEG_CHR_9_UP_IDX, SEG_CHR_9_UP_MSK

Lower half: SEG_CHR_9_DW_PORT, SEG_CHR_9_DW_IDX, SEG_CHR_9_DW_MSK

(In this example, the upper and lower halves refer to the lower and upper nibbles of the control register.)

a) Calculation of the control register (PORT port): In this example, SEG_CHR_9_UP_PORT is 4X+Y/8 (round up to 8) that is (4*10+0)/8=5 (using the starting coordinates of the half segment, ie X=10, Y=0), SEG_CHR_9_DW_PORT is (4*11+0)/8=5 (use the starting coordinates of the half segment, that is, X=11, Y=0);

b) Index value (IDX) calculation: compare SEG_CHR_9_UP_MSK with SEG_CHR_0_UP_MSK (SEG_CHR_0_UP_MSK and itself), the same is 0, and the difference is 1;

c) Mask (MSK) calculation: Calculate the value corresponding to each bit of the character field according to 4X+Y, as shown in Table 1 below,

Table 1 The value corresponding to each bit of the character field

Then use (4X+Y)%8 (modulo 8) to get the value corresponding to each bit, as shown in Table 2 below,

Table 2 The value corresponding to each bit

Among them, 0 corresponds to bit0, 1 corresponds to bit1, 2 corresponds to bit2, ..., and so on.

So SEG_CHR_9_UP_MSK=(~(bit0+bit1+bit2))=(~(2^0+2^1+2^2))= (~(7));

SEG_CHR_9_DW_MSK= (~(bit4+bit5+bit6+bit7))=(~(2^4+2^5+2^6+2^7)=(~(240)).

According to the above calculations, the following information is obtained:

(4) Obtain the mapping table from the character logical lattice to the physical lattice through the index value IDX as follows:

const U8 logseg_physeg_tab2[TOTAL_SEG_NUM]=

{

SEG_A1 , // 'logseg-a'

SEG_B1 , // 'logseg-b'

SEG_C1, // 'logseg-c'

SEG_D1, // 'logseg-d'

SEG_E1, // 'logseg-e'

SEG_F1, // 'logseg-f'

SEG_G1 // 'logseg-g'

};

The macro definition in the header file also defines the following information:

#define SEG_E1 BIT6

#define SEG_G1 BIT5

#define SEG_F1 BIT4

#define SEG_D1 BIT7

#define SEG_C1 BIT2

#define SEG_B1 BIT1

#define SEG_A1 BIT0

(5) Convert the character logical dot matrix into physical dot matrix, and return the value after the character physical dot matrix mask,

From logical lattice (LOGSEG_B+LOGSEG_C) to physical lattice (SEG_B1+SEG_C1)

SEG_B1+SEG_C1 = bit1+bit2 =2^1+2^2=0000 0110 (binary representation)

Returns the calculation of the character's physical lattice mask

return value = physical lattice & (~MSK)

The return value of the first half = 0000 0110 & 0000 0111 = 0000 0110 = 6;

Return value in the second half = 0000 0110 & 1111 0000=0000 0000= 0;

(6) Character display.

Then the return value is processed as follows:

return value & (~MSK)

Upper half=0000 0110 &0000 0111= 0000 0110;

Lower half=0000 0000&1111 0000= 0000 0000;

Add the upper and lower halves: 0000 0110;

Therefore, the bit value of the nixie tube at position 9 is 0000 0110, so that "1" can be displayed at the position 9 of the LCD screen.

According to the display driving method of the embodiment of the present invention, an XY coordinate value is given to each display segment (character segment, graphic symbol segment) of the segment liquid crystal display, wherein X represents the register address, Y represents the bit address, and 4X+Y represents The coordinate value is also the control address corresponding to the program. Information such as control registers (PORT ports), control bits (bits), and masks can be obtained through relevant calculations such as rounding and modulus of 4X+Y, and relevant macro definitions can be quickly generated in batches through excel tables or scripts. The advantages of doing this are: (1) Save the time spent on repeatedly reading the segment LCD logic diagram to obtain relevant control information and check the display control; (2) Quickly generate macro-defined header files in batches through excel sheets or scripts , which reduces the time of manually writing macro definitions and does not need to rewrite the control program; (3) All the information obtained is calculated through register addresses and bit addresses, and the information obtained is highly accurate; (4) Portability is very high.

Fig. 6 is a schematic diagram 600 of a segment liquid crystal display drive device according to an embodiment, the device 600 mainly includes: an assignment module 602, a first generation module 604, a second generation module 606, an acquisition module 608, and a drive module 610 . These modules can be realized by software, hardware, firmware or a combination thereof. in:

- The assignment module 602 is used to execute step 100;

- the first generation module 604 is used to execute step 102;

- the second generating module 606 is used to execute step 104;

- The acquisition module 608 is used to perform step 106; and

- The driving module 610 is used to execute step 108 .

FIG. 7 is a schematic diagram of another segment liquid crystal display drive device 700 according to yet another embodiment. The device 700 includes a processing unit 713 such as MCU, DSP or CPU. The processing unit 713 can be a single unit or a plurality of units to perform different steps. In addition, the device 700 may also optionally include an interactive interface 780 and an output unit 790 for inputting data such as logic diagram display segment information and information to be displayed on the segmented liquid crystal display, and outputting driving data. Furthermore, the device 700 also comprises at least one computer program product 710 in the form of a non-volatile memory, such as EEPROM, flash memory or hard disk drive or the like. The computer program product 710 comprises a computer program 711 comprising program code which, when executed, causes the apparatus 700 to perform the steps shown with respect to FIG. 1 .

Specifically, the program codes in the computer program 711 of the device 700 include: an assignment module 711a, used to execute step 100; a first generation module 711b, used to execute step 102; a second generation module 711c, used to execute step 104 The obtaining module 711d is used to execute step 106; the driving module 711e is used to execute step 108. In other words, when the different modules 711a-711e are running on the processing unit 713, they correspond to the modules 602, 604, 606, 608 and 610 shown in FIG.

The present invention has been described above through specific examples, but the present invention is not limited to these specific examples. Those skilled in the art should understand that various modifications, equivalent replacements, changes, etc. can also be made to the present invention, such as dividing one step or module in the above-mentioned embodiment into two or more steps or modules to implement, or vice versa , implementing the functions of two or more steps or modules in the above embodiments in one step or module. However, as long as these changes do not deviate from the spirit of the present invention, they should all be within the protection scope of the present invention. In addition, some terms used in the specification and claims of this application, such as "first", "second", etc., are not limiting, but are merely for convenience of description. In addition, "one embodiment", "another embodiment" and the like described in various places above indicate different embodiments, and of course they can be combined in whole or in part into one embodiment.

Claims (10)

1. A kind of 1. segment liquid crystal display screen display drive method, it is characterised in that including：

   Assignment procedure, for extracting each display segment information from the logic chart of segment liquid crystal display screen, and give each display Section assigns two-dimensional coordinate value；

   First generation step, for generating the macrodefinition of character field control register, mapping table index value and mask, and/or Generate graphical symbol section control register, control bit and the macrodefinition of operation；

   Second generation step, for generating the header file for including above-mentioned macrodefinition information, the header file is added LCDs Among the engineering for showing driving；

   Obtaining step, the information for display required for obtaining；And

   Actuation step, for graphical symbol section, the operation macrodefinition generated by LCDs electrical form operated with Realize the display of graphical symbol；And/or for character field, the logic dot matrix of character is converted into physical lattice using mapping table, To realize that character is shown.
2. 2. segment liquid crystal display screen display drive method as claimed in claim 1, it is characterised in that the actuation step for Character field further comprises：

   Its index value in character logic dot matrix table is obtained according to the ASCII character of character；

   The logic dot matrix of the character is obtained in character logic dot matrix mapping table according to index value；

   Character field control register, mapping table index value, mask are obtained by character display location and physical segment relation table；

   By obtained character field control register, mapping table index value, mask, physical lattice is arrived with reference to character logic dot matrix Map index table, character logic dot matrix is converted into physical lattice, and the value after return character physical lattice mask；

   According to the value for being worth to each bit positions in charactron after the character field mask of acquisition and character physical lattice mask； And

   Corresponding charactron is chosen according to character field control register information, realized according to the value of each bit positions of acquisition corresponding Character show.
3. 3. segment liquid crystal display screen display drive method as claimed in claim 1 or 2, it is characterised in that：Walked in the assignment In rapid, assignment is carried out as Y-axis using the row of segment liquid crystal display screen logic chart as X-axis, row.
4. 4. segment liquid crystal display screen display drive method as claimed in claim 3, it is characterised in that：In the described first generation step In rapid, to the XY coordinate values of graphical symbol section, the digit of control register is rounded respectively by 4X+Y value and modulus, with life Control register, control bit and the macrodefinition of operation related into the graphical symbol section；And/or the XY coordinates to character field Value, is rounded and modulus to the digit of control register respectively by 4X+Y value, is deposited with generating the related control of the character field Device, mapping table index value, the macrodefinition of mask.
5. 5. segment liquid crystal display screen display drive method as claimed in claim 1 or 2, it is characterised in that：In the described second life Into in step, the header file of macrodefinition information is included by using electrical form or script generation.
6. A kind of 6. segment liquid crystal display screen display drive apparatus, it is characterised in that including：

   Assignment module, for extracting each display segment information from the logic chart of segment liquid crystal display screen, and give each display Section assigns two-dimensional coordinate value；

   First generation module, for generating the macrodefinition of character field control register, mapping table index value and mask, and/or Generate graphical symbol section control register, control bit and the macrodefinition of operation；

   Second generation module, for generating the header file for including above-mentioned macrodefinition information, the header file is added LCDs Among the engineering for showing driving；

   Acquisition module, the information for display required for obtaining；And

   Drive module, for graphical symbol section, the operation macrodefinition generated by LCDs electrical form operated with Realize the display of graphical symbol；And/or for character field, the logic dot matrix of character is converted into physical lattice using mapping table, To realize that character is shown.
7. 7. segment liquid crystal display screen display drive apparatus as claimed in claim 6, it is characterised in that the drive module configuration In pairs in character field：

   Its index value in character logic dot matrix table is obtained according to the ASCII character of character；

   The logic dot matrix of the character is obtained in character logic dot matrix mapping table according to index value；

   Character field control register, mapping table index value, mask are obtained by character display location and physical segment relation table；

   By obtained character field control register, mapping table index value, mask, physical lattice is arrived with reference to character logic dot matrix Map index table, character logic dot matrix is converted into physical lattice, and the value after return character physical lattice mask；

   According to the value for being worth to each bit positions in charactron after the character field mask of acquisition and character physical lattice mask； And

   Corresponding charactron is chosen according to character field control register information, realized according to the value of each bit positions of acquisition corresponding Character show.
8. 8. segment liquid crystal display screen display drive apparatus as claimed in claims 6 or 7, it is characterised in that：The assignment module Using the row of segment liquid crystal display screen logic chart as X-axis, row assignment is carried out as Y-axis.
9. 9. segment liquid crystal display screen display drive apparatus as claimed in claim 8, it is characterised in that：First generation module To the XY coordinate values of graphical symbol section, the digit of control register is rounded respectively by 4X+Y value and modulus, should with generation Graphical symbol section related control register, control bit and the macrodefinition of operation；And/or the XY coordinate values to character field, lead to The value for crossing 4X+Y rounds and modulus to the digit of control register respectively, to generate the related control register of the character field, reflect The macrodefinition of firing table index value, mask.
10. 10. segment liquid crystal display screen display drive apparatus as claimed in claims 6 or 7, it is characterised in that：Second generation Module includes the header file of macrodefinition information using electrical form or script generation.