JPS6266779A - Display circuit for analog timepiece of picture tube - Google Patents

Abstract

PURPOSE:To display an analog timepiece on a picture tube by preparing image signals of each pointer that change moment by moment basing on output of an IC for timepiece. CONSTITUTION:After initial setting the position of display of an analog timepiece on a picture tube 1 from a keyboard switch 8, present time is inputted. The time data are written in an IC 3 for clock through a CPU 11, and time data generated basing on the time are sent to the CPU 11. Graduation of a clock 12, pointers 13, 14, 15 etc. are displayed at the set position on the picture tube 1. Then, vertical synchronizing signals, horizontal synchronizing signals and three primary color signals, RGB, are added by a video display generator 2 to the clock data outputted from the IC 3 for clock through the CPU 11, and sent to the picture tube 1. The position of pointers is changed and displayed by interruption process at every 1sec.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to an analog clock display circuit for a picture tube, which displays an analog clock on the picture tube.

"Prior Art" Conventionally, a decimal clock has been displayed on a picture tube, but an analog clock has not been displayed.

``Problems to be Solved by the Invention'' However, it would be desirable not only for practical purposes but also for decorative purposes if an analog clock could be displayed on the picture tube.

"Means for Solving the Problems" The present invention has been made to achieve the above-mentioned needs, and it provides a picture tube and a video display that outputs synchronization signals and color signals when displaying on this picture tube. A generator, a keyboard switch for inputting information such as where to display on the picture tube, current time, and alarm timer settings, and a clock IC for writing input time data and outputting time data every moment thereafter; A character generator that outputs characters such as scales and numbers, a RAM that stores constantly changing pointer positions, alarm data, etc., an alarm sound generation circuit that generates an alarm sound when the alarm time is reached, and an analog clock control program. R to remember
It consists of an OM, a CPU that exchanges data between the picture tube, video display generator, keyboard switch, clock IC, character generator, RAM, alarm sound generation circuit, and ROM and performs calculations.

"Operation" First, use the keyboard to make other initial settings such as where on the picture tube the analog clock is to be displayed, enter the current time, and write the time data to the clock IC. First, a scale is displayed on the picture tube.

Next, interrupt processing is performed every second to display each pointer on the picture tube. Then, each pointer begins to move sequentially at predetermined time intervals. Next, when you set the timer time, the timer mark position and timer time are displayed. Then, when the timer time is reached, the alarm sound generation circuit is activated to generate an alarm sound from the speaker.

"Example" Hereinafter, one embodiment of the present invention will be described based on the drawings.

In Figure 1, (1) is a picture tube, (2) is a vertical synchronizing signal (V), a horizontal synchronizing signal (H), and three primary color signals (R, (3) is a clock IC that reads the current time and outputs time data every moment.
1 (4) is a backup power source for this watch TC (3), (5) is a character generator that generates characters such as scales, numbers, letters, etc., (6) is each pointer position data,
RAM (Random Access Memory) that stores alarm data, etc. (7) is ROM (Read Only Memory) that stores the control program as an analog clock, (8)
) is a keyboard switch for inputting the current time, timer setting time, analog clock display position, etc., (9) is an alarm sound generation circuit that generates an alarm sound after the timer setting time has elapsed, (10) is a speaker that outputs the alarm sound, (11
) are the video display generator (2), clock IC (3), character generator (5), RA
M (6), ROM (7), keyboard switch (8)
), the alarm sound generation circuit (9), and the CPU (Central Processing Unit) that controls data transfer, calculations, etc.

Next, the operation of the above configuration will be explained.

Initial settings such as setting the position on the picture tube (1) for displaying an analog clock are performed using the keyboard switch (8). Next, the current time is input using the keyboard switch (8). Then, the data is c P U
(11) is written to the clock IC (3), and the time data generated based on that time is sent to the CPU (
11). In addition, the keyboard switch (8
) The clock scale (12), clock hands (13), (14), (15), etc. are displayed at the set position on the picture tube (1) inputted in step ). Next, from 1 watch IC (3) to CP
The clock data sent via U (11) is added with a vertical synchronization signal, horizontal synchronization signal, and 3M color signals of R, G, and B by a video display generator (2), and then sent to the picture tube (1). A clock like the one shown in Figure 2 will be displayed. In this state, interrupt processing is performed every second and each pointer (13) (
14) (15) works. In other words, this interrupt processing every second first calculates the position of each pointer (13), (14), and (15), stores the changes every second in RAM (6), and then calculates each point that has changed based on the stored data. Guidelines (13) (1
4) Display the positions of (ts) in sequence.゛Repeat this operation every second and move each pointer (13) (1
4) (15) moves. Next, is there no timer setting?
is YES, that is, when the timer is not used to set the alarm sound generation time, is the timer time still? MoY
It becomes ES and returns to the interrupt processing every second, and each pointer (1
3) Repeat only the movements of (14) and (15). No timer setting? When is No, timer setting processing is performed.

In other words, the CPU (11) stores the position marked by the timer.
Calculate it and display the mark (16) as shown in Figure 2.

When the timer time is input using the keyboard switch (8), letters and numbers (17) are displayed as shown in FIG. When the timer time setting becomes YES, the next step is to check whether the timer time is still set. is judged. And is the timer still on? When the time reaches NO1, that is, the timer time, the alarm sound generating circuit (9) is activated and an alarm sound is emitted from the speaker (10).

In addition, the scale of the picture tube (1) in the analog clock display (
12) It is also possible to change the color and brightness of each pointer (13) (14) (Is), letters and numbers (17), background (18), etc. by commands from the keyboard switch (8). .

``Effects of the Invention'' Since the present invention is configured in a double series, an analog clock can of course be displayed on the picture tube when no other images are being displayed, and even if other images are displayed, they will not overlap with the other images. This allows an analog clock to be displayed on the picture tube.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of an analog clock display circuit according to the present invention, FIG. 2 is a front view of a picture tube showing an example of displaying an analog clock, and FIG. 3 is a flow chart. (1)... picture tube, (2)... video display generator, (3)... clock IC1 (4)...
Power supply, (5)...Character generator, (6)...
...RAM, (7) ...ROM, (8) ...keyboard switch, (ri) ...alarm sound generation circuit, (1
0)...Speaker, (11)...Cr'U, (12
)...Scale, (13) (14) (15)...Each pointer, (16)...Alarm mark, (17)...
Letters and numbers, (18)...Background.

Claims (1)

[Claims] (1) Enter the picture tube, the video display generator that outputs the synchronization signal and color signal when displaying on this picture tube, the position on the picture tube to display, the current time, alarm timer settings, etc. A keyboard switch that writes input time data and then outputs time data every moment, a character generator that outputs characters such as scales and numbers, and a keyboard switch that writes the input time data and then outputs time data every moment. RAM for storing, an alarm sound generation circuit that generates an alarm sound when the alarm time is reached, and R for storing an analog clock control program.
A picture tube comprising an OM, and a CPU that performs mutual data exchange and calculations among the picture tube, video display generator, keyboard switch, clock IC, character generator, RAM, alarm sound generation circuit, and ROM. analog clock display circuit.