JPH0326991A - Time display circuit of visual image device - Google Patents

Abstract

PURPOSE:To attain easy confirmation of time and a timer by providing the circuit with one time confirmation key to indicate time and a timer on a display simultaneously. CONSTITUTION:When a power source switch 3 is on and a time confirmation key 2 is pushed in a condition to indicate an normal image signal 8 on a display 10, a character control signal 15 is output from an indication control circuit 1 to switch an visual image switch circuit so as to indicate both time and a timer set time. When the power source switch 3 is off and a time confirmation key 2 is pushed, the display 10 is in an operation condition to indicate a time. Thereby, time confirmation operation of both time and a timer can be made easy.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a display for checking the time of a clock and a timer. Video devices such as televisions that have both a timer function display the time separately by operating different keys when checking the time.Also, with normal video devices, the time cannot be checked when the power is off. [Invention] However, the conventional method has a small number of keys, and it is not possible to check the time on the clock and timer at the same time, making operation cumbersome.Furthermore, it is not possible to check the time when the power is off, and the clock and timer cannot be checked at the same time. Therefore, the present invention is intended to solve these problems, and its purpose is to simultaneously check the clock time and timer setting time with one key, and to An object of the present invention is to provide a time display that can be checked even when the power is off. [Means for Solving the Problems] A time display circuit for a video device according to the present invention provides: (1) a) a video device having a clock function and a timer function; b) It has only one key for checking the time, and C) By operating this key, the clock time and the timer setting time are simultaneously displayed on the image display. (2) a) In the active state, that is, in the normal video display state, b) When the time confirmation key is pressed, the time is displayed only while it is pressed, and C) The audio accompanying the video is d) When the power is off, that is, when normal images are not displayed, e) When the time confirmation key is pressed, the power is turned on for a certain period of time from the time the time confirmation key was pressed, and the It is characterized by displaying the time using an image display such as a liquid crystal display that can start displaying, and f) not outputting audio. (3)a)ti
In the power-on state, that is, in the normal image display state, b) the time display when the time confirmation key is operated is superimposed on the normal image; and C) in the power-off state, that is, the normal image is displayed. In the non-display state, d) The time is displayed on a specific background color when the time confirmation key is operated. [Example J Hereinafter, the present invention will be explained in detail based on Examples. 1 is a block diagram of the time display circuit of the video equipment of the present invention, FIG. 2 is a timing chart showing the operation of FIG. 1, and FIG. 3 is a block diagram of the time display circuit of the video equipment of the invention. FIG. 3 is a display image diagram showing an example of a time display. M1#i switch 3 is on mode, normal video signal 8
is displayed on the image display 10, when the time confirmation key 2 is pressed, the character control signal 15 is output from the display control circuit 1, and the character generation circuit 7
is activated and a character video signal 16 is generated. At the same time, the video switching circuit 9 is switched, and both the clock time and the timer setting time are displayed on the image display l○ as shown in FIG. These displays are displayed using the time confirmation key 2.
This is performed only while is pressed. Also, the audio will continue to be emitted during this time. Next, when the power switch 3 is in the off mode, the IT source voltages 13a and 13b are not supplied to the image display 10 and the audio amplification circuit 12 and are in a non-operating state, but when the time confirmation key 2 is pressed. Then, only the power supply voltage 13a is supplied, the image display 10 becomes operational, and the time display shown in FIG. 3 is performed. In this case, the display continues for a certain period of time (several seconds to about 10 seconds) after the time confirmation key 2 is pressed, and there is no need to keep pressing it. Also, voice 5 will not be uttered during this time. Next, FIG. 4 is a block diagram of a video switching circuit portion showing another embodiment of the time display circuit for video equipment of the present invention, and FIG. 5 is a timing chart showing the operation of FIG. 4. The video signal 8 is expressed as one signal, but as a specific example of color reproduction, it is expressed here in three colors, RGB. First, when the power switch 3 is in the on mode,
When the time confirmation key 2 is pressed, the character video signal 16a is displayed only during the period when the character video signal 16c or 16b is at H level.
lJ{The signal becomes L level, passes through gate l9, and switches the video switching circuit 9 to the character video signal side. Therefore, the image display 10 displays a normal video with a time display superimposed thereon. Next, when the power switch 3 is in the timer mode, the time confirmation key 2
When is pressed, the power supply control signal 14b remains at the L level and the output of the gate 19 also remains at the L level, so that the character video signal tea-16c is always input to the image display 10. Therefore, time is displayed using B (blue) as the background color. [Effects of the Invention] As explained above, according to the present invention, the time of both the clock and the timer can be checked using one time confirmation key, so the operation is easy and the number of keys is small. Furthermore, the time can be checked instantly even when the power is off, and the display remains visible for a while with just a momentary touch, making it easy to operate and extremely convenient for use as a clock. Additionally, unnecessary sounds are not made while checking the time when the power is off. Also, if you use superimposition while the power is on, you can check the time while watching the video, and if you use a specific background color while the power is off, no noise images that are difficult to see will be displayed, which is extremely practical. Also, the video equipment is K. Many of them are equipped with a microcomputer with a built-in Yakuta generation function, and the present invention can be implemented without any cost increase by making some changes to the software.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a time display circuit for video equipment according to the present invention. Figure 2 is a timing chart showing the operation of Figure 1. FIG. 3 is a display image diagram showing an example of the time display displayed on the image display device of FIG. FIG. 4 is a block diagram of a video switching circuit portion showing another embodiment of the time display circuit for video equipment according to the present invention. Figure 5 is a timing chart showing the operation of Figure 4. l 2 ・ ・Audio amplification circuit 19 ・ ・ ・Gate or higher

Claims (3)

[Claims] (1) a) In a video device that has a clock function and a timer function, b) has only one key for checking the time, and c) By operating this key, the clock time and timer setting time can be displayed on the image display at the same time. A time display circuit for video equipment characterized by displaying time. (2) a) In the power-on state, that is, in the normal video display state, b) When the time confirmation key is pressed, the time is displayed only while it is pressed, and c) The audio accompanying the video is displayed as the time. d) When the power is off, that is, when the normal image is not displayed, e) When the time confirmation key is pressed, the power is turned on for a certain period of time from the time the button was pressed, and the display starts immediately. 2. The time display circuit for video equipment according to claim 1, wherein time is displayed using an image display such as a liquid crystal display, and f) no audio is output. (3) a) In the power-on state, that is, in the normal video display state, b) The time display when the time confirmation key is operated is superimposed on the normal video, and c) In the power-off state, i.e. 2. The time display circuit for video equipment according to claim 1, wherein: d) when the normal video is not displayed, the time is displayed on a specific background color when the time confirmation key is operated.