JP2545820B2 - Electronic device control device - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for electronic equipment equipped with a control microcomputer. [Outline of the Invention] The present invention is a control device for an electronic device, wherein the control data generating means is reset when a power key is operated or a power plug is inserted into an AC power outlet.
It has a detection means for detecting whether the power key is operated or the power plug is inserted into the AC power outlet, based on the detection result by the detection means, after the reset, By controlling the control data generated from the control data generating means by a program control in the control data generating means so as to delay the control data by a predetermined time, malfunction prevention due to chattering of the power operation switch is prevented, and a power supply command is issued by a power key. In this case, it is possible to easily and accurately perform the control corresponding to the case where the power plug is inserted into the AC power supply outlet, such as the control of the delay time, the power-on or the power-off, etc. It was done like this. [Prior Art] Conventionally, an electronic device equipped with a microcomputer for controlling operation is known, and even in a television receiver (hereinafter abbreviated as a receiver), tuner selection, video and audio A microcomputer is used for control and the like. [Problems to be Solved by the Invention] In the above-described image receiver, when the microcomputer runs away due to a momentary interruption of commercial power supply or discharge in the picture tube, the tuner switches from a desired channel to another channel. However, inconveniences such as replacement of the sound volume and maximum sound volume occur. Therefore, in the conventional receiver, the microcomputer is reset and the runaway is corrected by operating the power supply key of the receiver main body. However, the main body power key is usually configured to come into contact with a push-push type operation switch mounted on a printed wiring board inside the receiver, and when the main body power key is operated, chattering is performed on the operation switch. When occurs, it seems that the power key of the main unit has been operated several times,
There is a problem of malfunction in that the power of the receiver cannot be turned on / off according to the user's intention depending on the number of chattering times. In view of such a point, an object of the present invention is to provide a control device for an electronic device in which a malfunction due to chattering of a power operation switch is prevented. [Means for Solving Problems] The present invention relates to a control device for an electronic device, in which the control data generating means is reset when a power key is operated or a power plug is inserted into an AC power outlet. ,
It has a detection means for detecting whether the power key has been operated or the power plug has been inserted into the AC power supply outlet, based on the detection result by the detection means, after the reset The control data generated by the control data generating means is controlled by program control in the control data generating means so as to delay the control data by a predetermined time. [Operation] According to the present invention described above, the detection means detects whether the power key has been operated or the power plug has been inserted into an outlet for supplying AC power. The detection result is supplied to the data control means. The data control unit controls the control data to be delayed by a predetermined time after the reset based on the detection result by program control. [Embodiment] An embodiment in which a control device for an electronic device according to the present invention is applied to a receiver will be described below with reference to FIGS. 1 to 4. The configuration of one embodiment of the present invention is shown in FIG. In FIG. 1, a high frequency signal induced in a receiving antenna (1) is appropriately selected by a tuner (2), converted into an intermediate frequency signal, and supplied to a video intermediate frequency circuit (3). The video signal from the detection circuit (4) is supplied to the video signal circuit (5), and the audio intermediate frequency signal of 4.5 MHz is supplied from the video intermediate frequency circuit (3) to the audio intermediate frequency circuit (6). The audio signal from the detection circuit (7) is supplied to the speaker (9) via the audio amplifier (8). The output of the video signal circuit (5) is supplied to the picture tube (10) and is also branched and supplied to the sync separation circuit (11). From this sync separation circuit (11), the vertical sync signal and the horizontal sync signal are supplied to the vertical deflection circuit. (12) and the horizontal deflection circuit (13). The outputs of the deflection circuits (12) and (13) are supplied to the deflection coil DY, and the output of the horizontal deflection circuit (13) is supplied to the high voltage circuit (14). The system control circuit (20) has a microcomputer and controls each part of the receiver such as tuning of the tuner (2), operation of the video signal circuit (5) and the audio amplifier (8), The state of this control is stored in the memory (21), and when the power is turned on again, the state of each part of the receiver at the time of interruption is reproduced. (23) is an operation key attached to the main body of the receiver, which is directly connected to the system control circuit (20). (2
4) is a remote controller, which has operation keys (25) and an infrared transmitter (26), and is connected to the system control circuit (20) via a receiver (27). The main body operation key (23) has the minimum necessary control functions such as opening and closing the power supply, sequentially selecting a channel, and voice. The remote operation key (25) has a more convenient control function such as direct tuning in addition to the basic control function described above. Reference numeral (28) is a flip-flop incorporated in the microcomputer, which is connected to the main body power key (23p) in the main body operation keys (23). This main body power key (23p), as shown in Fig. 3,
The pressing portion is exposed to the outside of the front panel FP of the receiver and is attached so as to rotate about the other end. In addition, the middle part of the main body power key (23p) is in contact with the push-push type operation switch SW attached to the printed wiring board CB, and this switch SW alternates every time the main body power key (23p) is pressed. Open and close. Although not shown, the main power supply circuit (31) supplies various predetermined power supply voltages to the respective parts of the receiver such as the tuner (2) to the horizontal deflection circuit (13) and the sub power supply circuit (32). A predetermined power supply voltage is supplied to the system control circuit (20), the memory (21) and the receiver (27). The main power supply circuit (31) is directly connected to the commercial power supply AC via the main power supply switch (relay) (33). Opening and closing the relay (33) is based on the operation of the main unit key (23) or remote key (25), and the system control circuit (2
Controlled by 0). Next, the power supply control operation of the embodiment of FIG. 1 will be described with reference to FIG. The power control operation is started by pressing the power key (23p) on the main unit or by attaching or detaching the power plug to or from the AC outlet, and the microcomputer is reset (step), and the built-in 4-bit registers A and B respectively
To

[0] is substituted (step,). Then 13
The no-operation period of the step elapses (step). In this embodiment, one step is set to about 3 μS, and the period of this step is about 40 μS. Next, [1] is added to the register B (step), and it is determined whether or not the register B has been carried (step). If the register B does not carry, the process returns to the step and the above-described operation is repeated. Becomes a carry addition of [1] to the register B is 2 ⁴ (= 16) times repeated, the is added to (1) in the register A, whether made to a carry is judged (step) . If the register A does not carry, the process returns to the step and the above operation is repeated 16 times. As a result, the step no-operation is repeated 256 (= 16 × 16) times, and the total reaches about 10 mS. The chattering period of the operation switch SW is usually at most 3 mS, and the time of 10 mS described above is long enough to avoid the influence of chattering. In the next step, it is determined whether or not the main body power key (23p) has been operated. When the main body power key (23p) is pressed, as shown in FIG. 4A, the voltage between the terminals of the operation switch SW, which was initially "HI", becomes "Lo" after the chattering period Tch of 3 mS, for example. Stabilize. As a result, the operation of the power key (23p) on the main unit is detected. The microcomputer is stably reset after the chattering period Tch has passed, as shown in FIG. If the power key (23p) of the main unit is not pressed and the power plug is connected or disconnected, wait 400mS (step) and then press the power key (23p) of the main unit to avoid the transient period of the sub power supply (32). If the last memory (2
The reading of 1) is performed (step), and the RAM and ports of the microcomputer are initialized (initialized) (step,). In the next step, power key (23p) on the main unit again
It is determined whether or not is pressed. If pressed, the power flag corresponding to the flip-flop (28) is inverted (step), and immediately after the power plug is removed, it is immediately determined whether the power flag is "1" or not. (Step), depending on the power flag “1”, “0”
The relay (33) is closed and opened, and the power is turned on or off (step,). Although the embodiments applied to the television receiver of the present invention have been described above, the present invention can of course be applied to various electronic devices equipped with a control microcomputer. [Effects of the Invention] According to the present invention described above, the detection means detects whether the power key has been operated or the power plug has been inserted into an AC power supply outlet. The detection result is supplied to the data control means. The data control means, by program control, based on the above detection result,
After the reset, the control data is controlled to be delayed for a predetermined time. This prevents erroneous operation due to chattering of the power operation switch, and controls depending on whether the power supply command is issued by the power key or by inserting the power plug into the AC power supply outlet, for example, delay time. Control, power on or power off,
There is an effect that it can be performed easily and accurately.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment in which a control device for electronic equipment according to the present invention is applied to a television receiver,
FIG. 2 is a flow chart for explaining the operation of the embodiment of FIG. 1, FIG. 3 is a schematic cross-sectional view showing the configuration of the main part of the embodiment, and FIG. 4 is a description of the operation of the embodiment. FIG. 6 is a waveform diagram for doing so. (2) is a tuner, (5) is a video signal circuit, (8) is an audio amplifier, (20) is a system control circuit (microcomputer), (23) is a main body operation key, (23p) is a main body power key, ( 31) is a main power supply circuit, (33) is a main power switch (relay), and SW is a power operation switch.

Claims (1)

(57) [Claims] 1. A control device for an electronic device, wherein a control data generating means is reset when a power key is operated or a power plug is inserted into an outlet for supplying AC power, wherein the power key is operated. Or the power plug is inserted into the AC power supply outlet, the control data generating means generates the data after the reset based on the detection result of the detecting means. A control device for electronic equipment, characterized in that the control data is controlled by a program control in the control data generating means so as to delay the control data by a predetermined time.