JPH035592B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an electronic analog display method that allows smooth display when there is a large difference between a displayed value and a detected value to be displayed next. Conventionally, devices with display panels as shown in Figures 1 and 2 have already been proposed as devices that quantitatively display the numerical values of the detection section, but these devices emit light along a linear scale M. By arranging many EL elements,
All the light emitting elements up to the indicated value emitted light. In this type of device, the voltage corresponding to the numerical value input from the detection section is inputted to a plurality of comparators set to different reference voltages, and compared with each reference voltage.
It is designed to control and drive the display section, which consists of a display panel connected to the rear stage. For this reason, a new value with a large difference from the currently displayed value may be displayed in an extremely short period of time.
For example, if an input is made within the time required for the comparator to compare the input voltage and the reference voltage, the voltage corresponding to the currently displayed value and the voltage corresponding to the newly input value will be A comparator with a reference voltage set within the voltage range is
It outputs a signal that drives the light emitting element EL almost instantly. In other words, a light emitting element that displays numerical values.
The EL will jump from the currently displayed state (Fig. 1) to the state in which it displays the value corresponding to the newly input value (Fig. 2) in one step. This type 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 this type of device, which is to display numerical changes as continuous and smooth quantitative changes. There has been a desire for a device that solves this problem for some time. 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 segments are set one by one from the current displayed value. The lighting method is known. However, in the above method, when switching the display, it takes a lot of time because the display is switched when there are many segments and the difference between the displayed value and the detected value is large, but this is visually The drawback was that the responsiveness seemed to be poor. In order to solve the drawbacks of the conventional example, the present invention calculates the difference between the current display value and the latest detected value, and when this difference exceeds a predetermined value, the current display value is changed to the latest detected value. It is characterized by updating and displaying all segments up to a predetermined area near the latest detection value in a change area to the latest detection value, and thereafter updating and displaying the remaining segments up to the latest detection value one by one or a predetermined number at a time. The purpose is to first display a certain number of lines that are less than the detected value (if the displayed value is smaller than the detected value) or a certain number of lines that are greater than the detected value (if the displayed value is greater than the detected value), and then display the remaining segments up to the detected value by 1. To provide an electronic analog display system that can smoothly change the display by changing the display one book at a time or several at a time and switching the display up to the detected value, and can shorten the time required for display switching. Hereinafter, embodiments will be described in detail with reference to the drawings. FIG. 3 shows a block diagram of an embodiment of the present invention, where 1 is an input terminal, 2 is a detector, 3 is a comparator, 4 is a display data memory, 5 is a display, and 6 is a flicker prevention device. 7 is a first segment increase/decrease circuit, 8 is a second segment increase/decrease circuit, and when the input is the engine rotation speed or running speed, the signal input from the input terminal is detected at a certain timing. Measure at 2. Furthermore, if the signal input from the input terminal 1 is a voltage, it may be converted into a digital signal by an A-D converter and measured by a detector at every certain timing, and any measurement target may be used. In the electronic analog display system of this embodiment configured in this way, the comparator 3 compares the difference between the detected value, the displayed value, and the detected value, and when the difference is greater than a predetermined value [A], 1 Displayed value >In the case of a detected value First, the first segment increase/decrease circuit 7 is applied to the detected value.
A certain constant value [a] is added, and the current display value is switched to that value. Thereafter, the remaining segments are decreased by one or several [β] until the displayed value reaches the detected value in the second segment increase/decrease circuit 8. For example, the display value is "15"
So, if the detected value is "4", a certain constant value [a]
is 3, and if you change the remaining segments one by one, the actual display changes will be "15", "7",
The display will be "6", "5", and "4", and the display can be switched smoothly. 2 When Displayed Value<Detected Value First, the first segment increase/decrease circuit 7 subtracts a constant value [a] from the detected value and switches the current displayed value to that value. Thereafter, the remaining segments are increased by one or several [β] by the second segment increase/decrease circuit until the displayed value reaches the detected value. For example, if the displayed value is ``5'' and the detected value is ``18,'' then a certain constant value [a] is set to 6, and the remaining segments are changed by two lines [β] to sequentially switch the displayed value. The display changes to "5", "12", "14", "16", and "18", allowing smooth display. In addition, if the difference between the current display value and the detected value is smaller than the predetermined width [A], one or several lines [β]
Switch segments one by one. Further, when the input signal is a pulse signal, the detector 2 counts the input pulses input from the input terminal 1 for every certain timing signal. Next, comparator 3
The current display value stored in the display data memory 4 and the magnitude of the detection value of the detector 2 are compared. In this case, the following three types of determinations are made. (a) Detection value - Display value≦A (b) Detection value - Display value>A (c) Detection value <Display value <A Here, in the case of (a), flicker is prevented by the flicker prevention circuit 6. In the case of (b), the first segment increase/decrease circuit 7 calculates the value obtained by subtracting α from the detected value of the detector 2, sends it to the display data memory 4, displays it as display data, and then The second segment increase/decrease circuit 8 adds and displays β to the contents of 4, and repeats this until the value becomes the same as the detected value. In the case of (c), the value obtained by adding α to the detected value is calculated and displayed first as a display value. Then, β is subtracted from the contents of the display data memory 4 and displayed, so that the value is the same as the detected value. Repeat until the value is reached. As mentioned above, in case (a), flicker prevention processing is performed in the flicker prevention circuit 6 in order to prevent unstable changes in the displayed value due to minute fluctuations in the detected value. Flicker prevention and display change operations in response to increases and decreases in values will be explained.

[Table] For example, as shown in Table 1, when the detected value is increasing such as "5", "6", and "7",
By using the detected value as it is as the displayed value, and when the detected value is decreasing from "7" to "6" with respect to the displayed value, a predetermined value, that is, "1" is added to the detected value and used as the displayed value. , even if the detected value fluctuates slightly,
The displayed value is ``7'', which does not change and does not flicker, allowing stable display. In the case of B in Table 1, the detected value is "5", "6",
When the value is "7" and increasing, the detected value is used as the displayed value, and the detected value is "6", "5", "4", etc.
If "3" is in the decreasing direction, "1" is added to the detected value.
Add and display. As explained above, according to the present invention, when there is a difference between the currently displayed value and the detected value by a certain value or more, the first segment increase/decrease circuit adds or subtracts a certain value [a] to the displayed value. First, a fixed number of segments less than the detected value (if the displayed value is smaller than the detected value) or a number greater than the detected value (if the displayed value is greater than the detected value) is displayed, and then the second segment increase/decrease circuit adjusts the remaining segments. By changing one line or several lines [β] at a time and switching the detected value to the display value, smooth display without jumps can be performed.

[Brief explanation of the drawing]

1 and 2 are explanatory diagrams of a conventional display system, and FIG. 3 is a block diagram of an electronic analog display system according to an embodiment of the present invention. 1...Input terminal, 2...Detector, 3...Comparator, 4...Display data memory, 5...Display device, 6
...Flicker prevention circuit, 7...First segment increase/decrease circuit, 8...Second segment increase/decrease circuit.

Claims (1)

[Claims] 1. An electronic analog display that detects a change in the measured quantity as an electrical variation, converts this detected value into a display signal, and displays the change in the measured quantity on a bar graph-shaped display area with aligned segments. In this method, the difference between the current display value and the latest detected value is calculated, and if this difference exceeds a predetermined value, first update any plural segments out of the total number of segments of the difference, and then , the remaining segment from this updated display value to the latest detected value is 1
An electronic analog display system characterized by updating the display one book at a time or a predetermined number at a time.