JPH0310317B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic analog display device that can smoothly display a difference between a currently displayed value and a next detected value to be displayed.

Conventionally, a display device having a display panel as shown in FIGS. 1 and 2 has already been proposed as a device for quantitatively displaying the numerical value of the detection part, but this display device has a linear scale A. A large number of light emitting elements EL were arranged along the line, and all of the light emitting elements up to the display value were made to emit light. In this type of device, the voltage corresponding to the numerical value input from the detection unit is input to multiple comparators set to different reference voltages, and compared with each reference voltage, the display connected to the subsequent stage is It controls and drives a display section consisting of a panel, etc.

Therefore, if a value with a large difference from the currently displayed value is input in an extremely short period of time, for example less than the time required for the comparator to compare the input voltage and the reference voltage, the currently displayed value will be The comparators whose reference voltages are set within a voltage range corresponding to the difference between the voltage corresponding to the current value and the voltage corresponding to the newly input value output signals that drive the light emitting elements EL almost all at once. That is,
The light emitting element EL, which displays numerical values, jumps from the current display state (see the shaded area in Figure 1) to the state where it displays the newly input value (see the shaded area in Figure 2) in one step. Things will change as things go up. This kind of display operation gives an unnatural feeling to the user who is trying to visually check the display panel, and also defeats the original purpose of displaying this type of device, which is to display numerical changes as continuous and smooth quantitative changes. Therefore, it has been desired to realize a device that solves this problem.

To solve this problem, if the difference between the displayed value and the detected value to be displayed next is large (more than a certain arbitrary width), in order to eliminate the jumpy display, the segment should be set to one segment from the current displayed value. A method of lighting one book at a time is known.

However, in the above method, when switching the display, it takes a lot of time because there are many segments and the difference between the displayed value and the detected value is large, so it takes a lot of time, but this also reduces the visual responsiveness. The drawback was that it felt bad.

In order to solve the above drawbacks of the conventional example, the present invention calculates the difference between the current display value and the latest detected value, divides this difference by a predetermined value, and adds the division result to the current display value. It is characterized by subtracting from the current displayed value, displaying the result of this addition and subtraction, and then decreasing the predetermined value by which the difference is divided by 1 each time the calculation is performed, and performing the same calculation again.The purpose is to divide the difference. The present invention provides an electronic analog display device in which the display becomes smooth by setting a large predetermined value, and the responsiveness of the display is improved by setting the predetermined value small. Embodiments of the present invention will be described in detail below with reference to the drawings.

Before describing embodiments of the present invention, the principle of the present invention will be explained. First, compare the latest detected value and the current display value, and divide the difference Δ by a certain number of meters, which is the value N = Δ/m
is added to or subtracted from the current display value, and the added or subtracted value is displayed as the current display value. When this calculation is completed, the latest detected value and the currently displayed value are compared again, and the difference is again divided by m. At this time, m is decreased by one each time the currently displayed value approaches the latest detected value. Calculate and gradually bring the calculation result closer to the current displayed value. Note that m is a certain number M each time the latest detected value is determined. That is, m=M m=M-1 m=M-2 : :. Further, when N=Δ/m≦1, that is, the difference between the counted value and the displayed value Δ≦m, the value is increased or decreased one segment at a time (by rounding up).

FIG. 3 shows a block diagram of an electronic analog display device according to an embodiment of the present invention, in which 1 is an input terminal, 2 is a detector, 3 is a comparator, 4 is a divider, and 5
6 is a display data memory, 6 is an addition/subtraction circuit, and 7 is a display device.

Next, the operation of this embodiment will be explained. First, the detector 2 counts the number of input pulses inputted from the input terminal 1 every time T. The detected value counted by the detector 2 is converted to a display value stored in the display data memory 5 by the comparator 3. and the difference Δ
is obtained, this difference Δ is divided by m in the divider 4, and the quotient N is obtained. That is, N=Δ/m (rounded up to the nearest whole number) is obtained.

Next, in the addition/subtraction circuit 6, the sum of the quotient N and the display value in the display data memory 5 is calculated,
This sum is stored in the display data memory 5 and displayed on the display 7. Then, the display data in the display data memory 5 and the detector 2 are updated again.
The difference Δ is obtained by comparing the detected value at , and the difference Δ is divided by (M-1) in the divider 4 to obtain the quotient N.

This quotient N is added to the updated value stored in the display data memory 5, rewriting the display data in the display data memory 5, and displaying it on the display.

In this way, by sequentially calculating and displaying the sum of the quotient N and the display data in the display data memory 5 until it matches the detected value, the display becomes smooth. Note that the value m by which the difference Δ is divided is a certain number M each time the latest detected value is determined. If the value of M is set large, the display will be smooth, and if the value of M is set small, the responsiveness of the display will be improved.

[Specific example 1] (a) When M is "3", the displayed value is "5", and the detected value becomes "11", N = Δ (displayed value - detected value) / M = ( 11-5)/3 = 6/3 = 2. Therefore, by adding N=2 to the display value "5", the display value becomes "7". Next, N = Δ/M-1 = (11-7)/2 = 4/2 = 2 is calculated, so by adding N = 2 to the displayed value "7", the displayed value becomes " 9”.
Furthermore, since N=Δ/M-2=(11-9)/3-2 =2/1=2 is obtained, by adding N=2 to the display value "9", the display value "9" is calculated. 11'', which matches the detected value.

(b) When M = 3, if the displayed value is "5" and the detected value is "12", if the calculation is performed in the same way as in (a) above, the displayed value will be "5" and "8". , "10", and finally matches the detected value "12".

(c) When M = 3, if the displayed value is "5" and the detected value becomes "13", the displayed value will be "5" and "8" when calculated in the same way as in (a) above. , "11", and finally matches the detected value "13".

[Specific example 2] (a) When M=2, if the displayed value is "5" and the detected value becomes "11", then N=Δ/M=(11-5)/2 =6/ 2=3. Therefore, by adding N=3 to the displayed value "5", the displayed value becomes "8". Next, N = Δ/M-1 = (11-8)/1 = 3/1 = 3 is calculated, so by adding N = 3 to the displayed value "8", the displayed value becomes "11",
Matches the detected value.

(b) When M = 2, if the displayed value is "5" and the detected value is "12", if the calculation is performed in the same way as in (a) above, the displayed value will be "5" and "9". and finally matches the detected value "12".

(c) When M=2, if the displayed value is ``5'' and the detected value becomes ``13'', the displayed value will become ``5'' and ``9'' when calculated in the same way as in (a) above. The value changes and finally matches the detected value "13".

As in the above specific example, if the value of M is set large, the display will be smooth, and if the value of M is set small, the responsiveness of the display will be improved.

As explained above, according to the present invention, when there is a difference between the displayed value and the detected value, the difference is divided by a predetermined value, and the divided value is added to the displayed value and displayed. The predetermined value for dividing the difference between the detected value and the detected value is decreased by 1 each time the calculation is performed, and the result is added to the displayed value and displayed in order to finally match the detected value. By setting this value, the display becomes smooth, and by setting the predetermined value to a small value, there is an advantage that the responsiveness of the display is improved.

[Brief explanation of the drawing]

Figures 1 and 2 are explanatory diagrams of conventional display methods;
FIG. 3 is a block diagram of an electronic analog display device according to one embodiment of the present invention. 1... Input terminal, 2... Detector, 3... Comparator, 4... Divider, 5... Display data memory, 6
...Addition/subtraction circuit, 7...Display device.

Claims (1)

[Claims] 1. An electronic analog display device that detects changes in the measured quantity as electrical changes, converts the detected value into a display signal, and displays the change in the measured quantity on a bar graph-shaped display area with aligned segments. , a detector for detecting a change in the measured quantity as an electrical change, a comparator for determining the difference between the latest detected value by the detector and the current displayed value, and a preset value for the difference determined by the comparator. A divider that divides by a predetermined value, and the division result of the divider, depending on the magnitude relationship between the display value and the latest detected value, if the detected value is large, it is added to the display value, and if the detected value is small, it is added to the display value. and a display data memory that updates and holds the value obtained by the addition and subtraction circuit as a display value, and the operation of determining the difference between the display value and the latest detected value in the comparator is performed by the addition and subtraction circuit. The division operation in the divider is sequentially executed for the latest displayed value obtained by -1, m=M-
2. An electronic analog display device characterized by being executed with values set in the order of...