JPH0785295A - Method for processing detected data and graphic display device - Google Patents

Abstract

PURPOSE:To obtain a detected data processing method capable of reducing the storage capacity of a RAM by dividing detected data by resolution and storing the divided data in the RAM. CONSTITUTION:This detected data processing method is provided with a data input process 1 for inputting detected data from a sensor 40 at a prescribed interval, a detected data conversion process 2 for converting the detected data inputted by the process 1 into sample data corresponding to data width equal to one dot on a display screen and a converted data storing process 3 for storing the converted data in a storage means 46.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a small-sized, low-resolution graphic display device for displaying various data detected by a sensor in a graph corresponding to time and displaying out-of-range data in a graph by scrolling the entire screen up and down. .

[0002]

2. Description of the Related Art Conventionally, as a graphic display device, one using a dot matrix type LCD panel has been known, and when used in a wristwatch or the like, there is a size restriction.
At present, the LCD panel cannot be made too large due to problems such as price, and the display screen must be scrolled up and down in order to display data with a large amount of change.

FIG. 5 is a block diagram showing a configuration of a conventional graphic display device, FIG. 6 is an external view of a display portion of the conventional graphic display device, and FIG. 7 is an explanatory diagram for explaining scrolling of the conventional graphic display device. FIG. 8 is an explanatory diagram for explaining the memory usage state of the conventional graphic display device, and FIG. 9 is a flowchart showing the operation of the conventional graphic display device.

In FIG. 5, 40 is a sensor for detecting temperature, 41 is an A / D converter for converting an analog signal from the sensor 40 into a digital signal, 42 is a switch section for operating the graphic display device, and 43 is A. A microcomputer to which the output of the / D converter 41 is input and which performs arithmetic processing, display processing, and the like, 44 is a reference signal generator that generates an operation clock of the microcomputer 43,
Reference numeral 45 is a ROM in which a program for causing the microcomputer 43 to perform calculation and display processing is stored, 46 is a RAM in which data detected by the sensor 40 and display data calculated by the microcomputer 43 are stored, 47
Is an LCD display unit for displaying a measurement result, 48 is an LCD segment driver for driving the LCD display unit with a signal from the microcomputer 43, and 49 is an LCD common driver for driving the LCD display unit with a signal from the microcomputer 43. .

In the LCD display unit 47, for example, as shown in FIG. 6, the horizontal axis of the dot matrix represents the elapsed time and the vertical axis represents the range of data. When 1 dot on the horizontal axis of the dot matrix is set to be, for example, 1 second, the detected data can be displayed for 20 seconds, and when the width of data represented by 1 dot on the vertical axis (hereinafter referred to as resolution) is, for example, 10 ° C., the maximum Data in the 100 ° C range can be displayed.

The data display on the display unit 47 is such that every time data is detected, the entire graphic display is scrolled to the left so that the latest data is always displayed at the right end. When it is out of the range, the data is displayed by scrolling up and down as shown in FIG.

The data detected by the sensor 40 stored in the RAM 46 and the display data calculated for displaying on the LCD display unit 47 are detected by the number of data and the sensor 40 as shown in FIG. The data is stored in the sample data memory area 46A in which the memory capacity to be used is determined by the sample data length of the data and in the display data memory area 46B in which the memory capacity to be used is determined by the data length indicating the number of data and the display range.

Next, the operation of the conventional graphic display device will be described with reference to FIG. First, it is determined whether or not it is the detection time (S50), and if it is not the detection time in S50, the process ends, and if it is the detection time, the display data memory area 46B and the sample data memory area 46 of the RAM 46 are completed.
The latest data pointer that sets the location for storing the latest sample data of A is incremented by 1 (S51). The data pointer changes by the number of data stored in the RAM 46, for example, and repeatedly changes so as to overwrite the oldest sample data. And the sensor 40
Temperature etc. is detected by (S52), and the detected data is RA.
The latest sample data is stored in the location designated by the latest data pointer of the sample data memory area 46A of M46 (S53).

Next, it is judged whether or not the latest sample data is out of the displayed range (S54). If it is not out of range, the value at the lower end of the display screen is determined when displaying from the latest sample data. The reference sample data to be drawn is divided, and a value obtained by dividing it by the resolution is stored in the location designated by the latest data pointer of the display data memory area 46B of the RAM 46 (S55).
Based on the display data stored in B, graphic display is performed on the LCD display unit 47 so that the latest data is always displayed at the right end of the display screen (S60).

If the data is out of range in S54,
Change the latest sample data to the reference sample data so that the latest sample data is displayed on the display screen (S
56). Further, in order to change the display data of the display data memory area of the RAM 46 based on the reference sample data and scroll the screen, the location where the data of the display data memory area and the sample data memory area of the RAM 46 are stored is designated. There is a scroll pointer.

Then, the reference sample data is subtracted from the sample data stored in the location designated by the scroll pointer in the sample data memory area of the RAM 47, and the value obtained by dividing the reference sample data by the resolution is scrolled in the display data memory area of the RAM 46. It is stored in the location designated by the pointer (S57) and the scroll pointer is incremented by 1 (S5).
8). Next, it is determined whether or not the sample data has been repeated several times (S59). If the sample data has not been repeated several times, the process returns to S57, and if the sample data has been repeated several times in S59, that is, from all the sample data to the reference sample data. The display data is calculated based on
If it is stored in the display data memory area of M46, a graphic display is displayed on the LCD display section 47 so that the latest data is always displayed at the right end of the display screen based on the display data stored in the display data memory area. Do (S6
0). By repeating the above operation, graphic display is performed while scrolling the display screen to the left and up and down.

The conventional graphic display device operates as described above, stores the detection data detected by the sensor 40 in the sample data memory area 46A of the RAM 46 as it is, and when the display screen is scrolled up and down,
By subtracting the reference sample data from the sample data and dividing it by the resolution for all the sample data, the reference value at the lower end of the screen display is changed and the screen is scrolled up and down.

[0013]

In the conventional graphic display device as described above, the detection data detected by the sensor is directly stored as sample data in the sample data memory area of the RAM, and when the display screen is scrolled up and down. , The reference sample data is subtracted from the sample data, and it is divided by the resolution to scroll all sample data, so if the application field of the graphic display device is a wristwatch, the graphic display Device miniaturization, low price,
Low power consumption is required, and as a method of low power consumption,
There is a method of lowering the frequency of the reference signal generator supplied to the microcomputer, but if the microcomputer that operates at a low frequency is used to scroll the graphic display up and down, the calculation speed is slow and it takes time to create the display data. Therefore, there is a problem that the update of the graphic display is delayed.

In addition, a small-capacity RAM is often used as part of miniaturization and cost reduction, and the RAM of the RAM is used to store the detection data detected by the sensor and the display data for graphic display. There was a problem that the capacity was insufficient.

The present invention has been made to solve such a problem, and divides the detection data by the resolution R
An object of the present invention is to provide a detection data processing method and a graphic display device which can be stored in the AM, the storage capacity of the RAM can be reduced, and the update of the graphic display can be speeded up.

According to a first aspect of the present invention, there is provided a detection data processing method, which includes a data capturing step of capturing detection data from a sensor at predetermined intervals, and a display screen displaying the detection data captured in the data capturing step. The detection data conversion step of converting into sample data corresponding to the data width of 1 dot and the conversion data storage step of storing the converted sample data in the storage means.

A graphic display device according to a second aspect of the present invention is a display screen for performing graphic display, a sample data memory area for storing at least sample data, and a display data memory for storing display data to be displayed on the display screen. A storage means having an area and detection data detected by the sensor at predetermined intervals are taken in, a location for storing the latest sample data and the latest display data in the storage means is set, and the detection data has one dot on the display screen. The latest detected data processing means for converting into the sample data corresponding to the width of the data and storing it in the storage location of the sample data memory area of the storage means, and the latest sample stored in the sample data memory area of the storage means Judge whether the data is within the displayable range of the display screen and A screen position change judging means for judging whether or not to change the position, and when the screen position change judging means judges that there is no change, the display is made based on the reference sample data and the latest sample data representing the screen position of the display screen. The latest display data creating means for creating the latest display data to be displayed on the screen and storing it in the display data memory area of the storage means in the storage location of the latest display data and the screen position change determining means are determined to be changed. When changing the screen position of the display screen, based on the reference sample data representing the changed screen position and all the sample data stored in the sample data memory area of the storage means, all to be displayed on the display screen. Create the display data of
A display data memory unit for storing in a display data memory area of the storage unit; and a graphic display control circuit for performing graphic display on a display screen based on the display data stored in the display data memory area of the storage unit. is there.

[0017]

In the first aspect of the invention, the detection data from the sensor is captured at a predetermined interval in the data capturing step, and the detection data captured in the data capturing step is converted into one dot on the display screen by the detection data converting step. Is converted into sample data corresponding to the width of the data of, and the converted data is stored in the storage means in the conversion data storing step.

In the second invention, the display screen
Graphic display is performed, the sample data and the display data are stored by the storage means having at least the sample data memory area and the display data memory area, and the latest detected data processing means stores the detected data detected by the sensor at predetermined intervals. A place for storing the latest sample data and the latest display data in the storage means is set, the detected data is converted into sample data corresponding to the data width of one dot on the display screen, and the sample of the storage means is sampled. It is stored in the data memory area where the latest sample data is stored.

Then, the screen position change determination means determines whether or not the latest sample data stored in the sample data memory area of the storage means is within the displayable range of the display screen, and the screen position is changed. When it is determined whether or not there is no change by the screen position change determination means by the latest display data creation means, it is displayed on the display screen based on the reference sample data representing the screen position of the display screen and the latest sample data. The latest display data is created and stored in the display data memory area of the storage means in the place where the latest display data is stored.

Further, when the screen position change judging means judges that there is a change by the all display data creating means, the screen position of the display screen is changed, and the reference sample data representing the changed screen position and the storage means are stored. Based on all the sample data stored in the sample data memory area, all display data to be displayed on the display screen is created and stored in the display data memory area of the storage means,
The graphic display control circuit performs graphic display on the display screen based on the display data stored in the display data memory area of the storage means.

[0021]

1 is a block diagram showing a process of processing detected data of a graphic display device according to an embodiment of the present invention, FIG. 2 is a block diagram showing an operation of the graphic display device according to the embodiment, and FIG. FIG. 4 is a flow chart showing the operation of the graphic display device according to the example, and FIG. 4 is an explanatory diagram for explaining the memory usage state of the graphic display device of the embodiment. The configuration of the graphic display device of this embodiment is the same as that of the conventional example.

In FIG. 1, reference numeral 1 denotes a detection step of taking in detection data from the sensor 40 at a detection time, and 2 denotes division of the detection data from the detection step 1 by resolution to obtain sample data corresponding to the resolution of the graphic display screen. The detected data converting step 3 for converting is a converted data storing step for storing the converted data converted in the detected data converting step in the RAM 46. Through these steps, the detection data from the sensor 40 is stored in the sample data memory area of the RAM 46.

In FIG. 2, reference numeral 4 is the latest data storage address setting means for setting the place for storing the latest data in the sample data memory area 46A and the display data memory area 46B of the RAM 46 when the detection time of the predetermined interval is reached. At the detection time of, the output of the sensor 40 becomes A /
A detection data fetching means for fetching the detection data converted into a digital signal by the D converter 41, and 6 dividing the detection data fetched by the detection data fetching means by the resolution to convert it into sample data corresponding to the resolution of the graphic display screen. And the sample data memory area 46A of the RAM 46
The latest detection data conversion means for storing in the location set by the latest data storage address setting means 5 of the latest data storage address setting means 5, the latest data storage address setting means 4, the detection data fetching means 5, and the latest detection data conversion means. I am configuring. It should be noted that the latest detection data processing means fetches the detection data from the sensor at the detection time of a predetermined interval, sets a place for storing the latest sample data and the latest display data in the RAM 46, and displays the detection data on the display screen. The data may be converted into data corresponding to the width of the data of 1 dot and stored in the place of storing the latest sample data in the sample data memory area of the RAM 46.

Reference numeral 8 is a screen position obtained by the resolution with the reference sample data for determining the value of the lower end of the display screen, 9 is the latest sample data stored in the sample data memory area 46A of the RAM 46, and the screen position 8 is compared. The screen position change determining means for determining whether or not to change the reference sample data representing the screen position of the display screen, 10 subtracts the reference sample data from the latest sample data when the screen position change determining means determines not to change. RAM4
6 is the latest display data creating means for storing in the location set by the latest data storage address setting means 5 of the display data memory area 46B.

Reference numeral 11 is a reference data changing means for changing the latest sample data stored in the sample data memory area 46A of the RAM 46 to reference sample data when the screen position change determining means determines that the screen position is changed. Is a sample data memory area 46 of the RAM 46
In order to convert all the sample data stored in A into display data, sample data addressing means for designating an address, 13 is a reference data changing means from the sample data at the address designated by the sample data addressing means. Display data creating means for drawing the changed reference sample data and storing it at a location corresponding to the address designated by the sample data addressing means.

Reference numeral 14 is a repetition judgment means for judging whether or not the sample data has been repeated several times. If the repetition judgment means 14 is less than the number of sample data, it returns to the sample data addressing means. Further, the reference data changing means 11, the sample data address designating means 12, the display data creating means 13 and the repetition determining means 14 constitute the whole display data creating means 15. The all-display-data creating means changes the reference sample data, creates all the display data to be displayed on the display screen based on all the sample data stored in the sample data memory area of the RAM 46, and stores it in the RAM. Any data can be stored in the display data memory area.

Reference numeral 16 indicates the display data created by the latest display data creation means 10 or the entire display data creation means 15,
Based on the display data stored in the display data memory area 46B of the RAM 46, graphic data is created in the LCD display unit 47 so that the latest data is always displayed at the right end, and the LCD display unit 47 is driven to display the LCD. Part 4
7 is a graphic display control means for displaying a graphic on the display screen 17 of FIG.

The above-mentioned means allow the sensor 4 to be operated at every detection time.
The latest detection data is fetched from 0, sample data obtained by dividing the detection data by the resolution is stored in the RAM 46, and the latest data is scrolled to the left so that the latest data is always displayed on the right end on the display screen 17. When the data is out of the range of the display screen 17, the latest sample data is changed to the reference sample data so that the latest data is displayed, and all the display data are changed based on the changed reference sample data. Recreate and display screen 1
7 is scrolled up and down.

Next, the operation of the graphic display device of the embodiment will be described with reference to FIG. First, it is determined whether or not it is the detection time (S20), and if it is not the detection time in S20, the process ends, and if it is the detection time, a place for storing the latest data of the display data memory area and the sample data memory area of the RAM 46 is set. The latest data pointer is incremented by 1 (S21). This data pointer is, for example, the RAM 46.
The number of data stored in is changed, and the oldest data is overwritten repeatedly. Then, the temperature is detected by the sensor 40 (S2
2) The detected data is divided by the resolution, and the calculated value is stored as the latest sample data in the location designated by the latest data pointer in the sample data memory area of the RAM 47 (S23).

Next, it is judged whether or not the latest sample data is out of the range being displayed (S24). If it is not out of range data, when the data is displayed on the display screen 17 from the latest sample data. The value obtained by subtracting the reference sample data for determining the value at the lower end of the display screen 17 is stored in the RAM 4
The data is stored at the location designated by the latest data pointer in the display data memory area 6 (S25), and the latest data is always displayed at the right end of the display screen based on the display data stored in the display data memory area. LCD display 4
A graphic display is performed on S7 (S30).

If the data is out of range in S24,
The reference sample data is changed so that the latest data is displayed on the display screen (S26). Also, the display data in the display data memory area of the RAM 46 is changed based on the reference sample data, and the location where the data of the display data memory area and the sample data memory area of the RAM 46 is stored is specified in order to scroll the display screen 17. There is a scroll pointer.

Then, a value obtained by subtracting the reference sample data from the sample data stored in the location designated by the scroll pointer in the sample data memory area of the RAM 47 is placed in the location designated by the scroll pointer in the display data memory area of the RAM 46. It is stored (S27) and the scroll pointer is incremented by 1 (S28). Next, it is judged whether or not the sample data has been repeated several times (S29). If the sample data has not been repeated several times, the process returns to S27 and S29.
If the sample data is repeated several times, that is, the display data based on the reference sample data is calculated from all the sample data, and if it is stored in the display data memory area of the RAM 46, it is stored in the display data memory area. Based on the displayed data, the LCD display unit 4 is arranged so that the latest data is always displayed at the right end of the display screen 17.
A graphic display is performed on S7 (S30). By repeating the above operation, the graphic display is performed while the display screen 17 is scrolled to the left and scrolled up and down.

In this embodiment, before the detection data detected by the sensor 40 is stored in the RAM 46, it is divided by the resolution of the display screen 17 and the data is stored in the RAM 46 as sample data. Therefore, as shown in FIG. As compared with the case where the detected data is stored in the RAM 46 with the sample data length as it is, the memory capacity to be used may be smaller by the amount divided by the resolution, and the capacity of the RAM 46 can be reduced, or the surplus memory can be replaced with other memory. It can be used by the application.

Furthermore, when creating the display data to be displayed on the display screen 17, the operation of creating the display data by simply subtracting the reference sample data from the sample data and dividing by the resolution can be omitted. The creation time at the time of creation can be shortened, the screen display of the display screen 17 can be accelerated, the graphic display can be updated quickly when the display screen 17 is scrolled, and the power consumption can be reduced.

[0035]

As described above, according to the first aspect of the present invention, the detection data from the sensor is taken in at a predetermined interval in the data taking step, and the detection data taken in the data taking step is taken in the detection data converting step. Since the converted data is converted into the sample data corresponding to the width of the data of one dot on the display screen, and the converted data is stored in the storage means by the conversion data storing step, the data length of the detected data is the detected data. By being converted into the sample data corresponding to the data width of one dot of the display screen, the data length is shortened, the memory capacity used when stored in the storage means is reduced, and the storage capacity of the storage means is reduced. It has the effect that it can be made small, or the surplus memory can be used by other applications.

According to the second aspect of the invention, the latest detection data processing means fetches the detection data detected by the sensor at predetermined intervals, and sets the storage location of the latest sample data and the latest display data in the storage means. , The detected data is converted into sample data corresponding to the data width of one dot of the display screen, and stored in the sample data memory area of the storage means in the location for storing the latest sample data.

When the screen position is changed, the screen position of the display screen is changed by the all-display-data creating means, and the reference sample data representing the changed screen position and the sample data memory area of the storage means are stored. Create all the display data to be displayed on the display screen based on all the sampled data, store it in the display data memory area of the storage means, and store it in the display data memory area of the storage means by the graphic display control circuit. Since the graphic display is performed on the display screen based on the stored display data, the data length of the detection data is converted into sample data corresponding to the data width of one dot on the display screen. As a result, the data length is shortened and the memory capacity used when stored in the storage means is reduced, It is possible to reduce the storage capacity of 憶 means, or has the effect of being able to use the extra memory by another application.

Furthermore, when the display data is created, the display data can be created without converting it into data corresponding to the width of the data of one dot on the display screen, and the creation time at the time of creating the display data is shortened. There is an effect that the display becomes faster, the graphic display can be updated more quickly when the display screen is scrolled, and the power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing a process of processing detected data in a graphic display device according to an embodiment.

FIG. 2 is a block diagram showing an operation of the graphic display device according to the embodiment.

FIG. 3 is a flowchart showing an operation of the graphic display device according to the embodiment.

FIG. 4 is an explanatory diagram illustrating a memory usage state of the graphic display device according to the embodiment.

FIG. 5 is a block diagram showing a configuration of a conventional graphic display device.

FIG. 6 is an external view of a display unit of a conventional graphic display device.

FIG. 7 is an explanatory diagram for explaining scrolling of a conventional graphic display device.

FIG. 8 is an explanatory diagram illustrating a memory usage state of a conventional graphic display device.

FIG. 9 is a flowchart showing the operation of a conventional graphic display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 detection process 2 detection data conversion process 3 conversion data storage process 7 latest detection data processing means 8 range 9 screen position change determination means 10 latest display data creating means 11 reference data changing means 15 all display data creating means 16 graphic display control means 17 Display screen 40 Sensor 46 RAM (storage means) 46A Sample data memory area 46B Display data memory area

Claims (2)

[Claims] 1. A data capturing step of capturing detection data from a sensor at predetermined intervals, and converting the detection data captured in the data capturing step into sample data corresponding to a data width of one dot on a display screen. And a conversion data storing step of storing the converted sample data in a storage means. 2. A display screen for performing graphic display, a storage means having at least a sample data memory area for storing sample data and a display data memory area for storing display data to be displayed on the display screen, and a predetermined interval. The detection data detected by the sensor is fetched, the location for storing the latest sample data and the latest display data in the storage means is set, and the detection data corresponds to the data width of one dot of the display screen. The latest detection data processing means for converting the sample data into the sample data memory area of the storage means and storing the latest sample data in the storage location of the latest sample data, and the latest sample data stored in the sample data memory area of the storage means Change the screen position by determining whether it is within the displayable range of the display screen. Screen position change determination means for determining whether to change, when it is determined that there is no change in the screen position change determination means, based on the reference sample data and the latest sample data representing the screen position of the display screen, There is a change in the latest display data creating means for creating the latest display data to be displayed on the display screen and for storing the latest display data in the storage area of the display data memory area of the storage means, and the screen position change determining means. When it is determined that the reference sample data representing the screen position of the display screen is changed, the display based on the changed screen range and all the sample data stored in the sample data memory area of the storage means. All display data to be created on the screen and stored in the display data memory area of the storage means. A creation unit, on the basis of the display data displayed is stored in the data memory area of the storage means, a graphic display device, characterized in that it comprises a graphic display control circuit for a graphic display on the display screen.