JPH0664092B2 - Level display method - Google Patents

Description

Detailed Description of the Invention a. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of displaying a changing state of an electronic volume, that is, a volume signal indicating a changing state of a level.

B. 2. Description of the Related Art It is well known to display the volume on a bar with display elements arranged in a line (for example, JP-A-56-62422 H03K13 / 0).
2). It is also well known to control the volume with an electronic volume (for example, Japanese Utility Model Laid-Open No. 61-124111 H03F1 / 52).

By the way, for example, when the change of the electronic volume is set to 60 steps and this is evenly distributed to the six display elements arranged in a line to display a bar, the display elements that light up change every 10 steps. Even if the lighting state of the display element is observed, it is not possible to judge whether or not the volume is actually changing. When displaying an amount that changes continuously (so-called continuous here also includes discrete changes in which the change is small compared to the change in display), such inconvenience is inevitable. Will occur.

C. DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention solves the above-mentioned inconveniences and makes it possible to easily determine whether or not the amount is changing.

D. Means for Solving the Problems In the present invention, when the amount of change is displayed stepwise, the display mode is made different during the change of the amount and after the change is completed.

E. Operation For example, it should be possible to easily judge whether or not the change is in progress by blinking during the change, continuously lighting after the change ends, or changing the color of the display during the change and after the change stops. You can

F. Example FIG. 1 shows the volume level of six display elements (for example, LED, L
(CD etc.) (L _{1 to} L ₆ ) are arranged in a horizontal row to display a bar. An appropriate volume display level is assigned to each display element. For example, −68 to −50 dB with respect to the display element (L ₆ ), −6 to − with respect to the display element (L ₂ ).
Allocate like 2dB. The allocation may be even,
As described above, it may be unequal. Now, the initial state (-68
Operate the electronic volume from dB)
Suppose that the volume is increased by 2 dB every second). A display element (L ₆ ) in a lighting state in the initial state (Fig. 1A)
Is blinking when the electronic volume is operated, and the blinking display elements are sequentially changed to L in response to the volume increasing.
₆ → L ₅ → L ₄ (FIG. 1, b, c, d). The blinking cycle is, for example, 50 ms. When the operation of the electronic volume is stopped and the change in the volume ends, the display element (for example, L ₃ ) which has been blinking until that time is kept in the continuously lit state (first
Figure E).

It should be noted that when lowering the volume, it may be necessary to lower the volume rapidly, so it is advisable to reduce the volume by 2 dB every 100 ms.

FIG. 2 shows a circuit for realizing the level display method of the present invention, which corresponds to an electronic volume (not shown).
The microcomputer (2) operates in response to the operation of the key (1) for instructing the up / down, and the display elements (L _{1 to} L ₆ ) are selectively blinked or turned on by this output.

FIG. 3 shows a flow chart of the main routine for realizing the level display method of the present invention.

First, the presence / absence of a key input is determined, and if “no”, the display state is maintained as it is. If "Yes", it is determined in the next step whether the key input is the first operation. If it is the first operation, the display element (L6) corresponding to the level of the electronic volume at that time (for example, −68 dB) is selected and turned on (see FIG. 5).

After the key operation, "Yes" of the key input in the main routine
When it is determined for the first time, a flag “1” is set, and it is determined by this flag whether or not it is the first operation. When the key operation is completed, the flag is reset to "0".

If the key operation continues for, for example, 700 msec or more, it is determined that the operation is for changing the volume level. That is, if the key operation is a volume up operation, the volume is increased by 2 dB every 200 msec (see FIG. 5). If the key operation is 700 msec or less, a volume up of 2 dB is only made.

If the key operation is volume down operation, the volume is decreased by 2 dB every 100 msec. Therefore, when it is determined that 200 msec has elapsed during the up operation, the timer resets 200 msec, and when it is determined that 100 msec has elapsed during the down operation, the timer resets 100 msec. During continuous operation, the timer is subtracted, and when it becomes "0", it becomes an overflow and the elapsed time of 200 msec or 100 msec is measured.

The display element (L ₆ ) is blinking while the volume is increasing to -64 dB, -62 dB, etc., and when the volume is increased to -48 dB, the display element (L ₅ ) shifts to a blinking state. Then, when the key operation is stopped when the temperature has risen to −46 dB, the display element (L ₅ ) is in the continuous lighting state.

FIG. 4 shows a flow chart of interrupt processing for blinking the display element. This interrupt processing is performed every 1 ms. In this embodiment, it blinks every 50 ms. First, the presence / absence of a key input is determined, and if it is determined to be "absent," the process proceeds to a determination step of whether or not the display element is off. If it is determined to be "NO" (that is, during lighting) in this determination step, nothing is done and the process returns to the main routine. If it is determined to be "YES" (that is, the light is off), the display element is turned on and the process returns to the main routine.
Such a process is necessary to prevent the display element from being left in the off state when the key operation is stopped while the display element is in the off period in the blinking operation.

If the key input is determined to be “present”, it is determined in the next step whether or not the key operation is continuous operation, that is, 700 msec or more. If it is determined to be “NO”, the main routine is directly executed. Return. When it is determined to be "YES", the process proceeds to a step for determining the elapse of 50 ms. That is, when the timer overflows (timer is "0") by subtracting "1" from the timer set for 50 ms, the timer is set for 50 ms again and the state of the display element is reversed. In other words, if it is in the lighting state until then, it is switched to the extinguished state, and if it is in the extinguished state, it is switched to the lighting state,
Return to the main routine. In this way, blinking control is performed every 50 msec.

In the embodiment described above, the blinking display is used during the change and the continuous lighting display is used after the end of the change. However, the display color may be different between the change and the end of the change.

Further, the display is not limited to the bar display, and digital number display, that is, "1", "2", ... Display may be displayed in blinking while the number is changing, and may be continuously lit after the change. Of course, the display colors may be different.

G. Effects of the Invention According to the present invention described above, it is possible to know whether or not the display level amount is changing by a simple method. For example, when the rate of change of the volume level is slow or the volume level is a weak level, it is difficult for the auditory sense to determine whether or not the volume level is changing, but according to the present invention, it can be displayed visually clearly.

[Brief description of drawings]

Each of the drawings is a diagram for explaining the level display method of the present invention. FIG. 1 is a diagram showing a lighting state of a display element, FIG. 2 is a circuit diagram for realizing the display method of the present invention, and FIG. 3 is a flow chart of the main routine, FIG. 4 is a flow chart of interrupt processing, and FIG. 5 is a view showing a display state at the time of volume up. (1) is a key, (2) is a microcomputer, (L ₁
~ L ₆ ) is a display element

Claims (2)

[Claims] 1. A level display method for displaying a level by turning on only one display element among a plurality of display elements, wherein the only display element is displayed while the level is changing. A level display method characterized in that the display is made to blink, and after the level change is completed, the only one display element is continuously lit and displayed. 2. A level display method for displaying a level by turning on only one display element among a plurality of display elements, which is during a level change and after the level change ends. 2. The level display method according to claim 1, wherein the display colors of the display elements are different from each other.