JPS5846113B2 - Control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device that can be used to control multiple adjustment functions such as volume, color saturation, and brightness of a television receiver. The object of the present invention is to provide a device that can finely control a controlled circuit with good operability.

Recently, methods have been proposed for adjusting the volume, color saturation, etc. of a television receiver without using a variable resistor.

This uses a clock pulse generation circuit, a counter, and a D-A converter circuit, and the counter counts clock pulses while the adjustment switch is operated, and the counted output is analog-controlled by the D-A converter circuit. By converting it into a voltage and applying it to the voltage-controlled variable gain amplifier circuit of the audio circuit or chroma circuit, the volume, color saturation, etc. are continuously switched at a constant level, and after the switch is released, the current level is changed. The aim is to maintain this and complete the adjustment.

However, with such adjustment means, if the speed of change of the volume or color saturation applied during adjustment becomes too fast, it becomes difficult to stop at the desired adjustment state, so it is necessary to keep the change speed considerably slow. Therefore, there is a drawback in terms of operability that it takes a lot of time to reach the desired adjusted state during adjustment.

On the other hand, if we try to provide an operation switch that directly applies the level of each adjustment state such as volume and color saturation to the D-A converter circuit in order to eliminate such drawbacks, it would require a large number of switches for each adjustment function. A problem arises in that a level specifying switch is required, making the configuration too complex and very impractical.

SUMMARY OF THE INVENTION Therefore, the present invention aims to solve all of these problems and provide a device that can quickly and finely adjust many adjustment functions such as volume, color saturation, and brightness with a simple configuration and with good operability. This is the purpose.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings, with reference to the drawings, in which the present invention is implemented for three adjustments of volume, color saturation button, and brightness of a television receiver.

In the figure, 1 is the main television receiver circuit,
Here, the audio circuit 2a and the chroma circuit 2b.

Only three video circuits 2c are shown, and all other circuits are omitted.

Each of the circuits 2a, 2b, and 2c includes a voltage-controlled variable gain amplifier circuit controlled by an analog control voltage for adjusting the volume, color saturation, and brightness.

3a, 3b. 3c generates analog control voltages for volume, color saturation change, and brightness control to be applied to the audio circuit 2a, chroma circuit 2b button, and video circuit 2c, respectively.
A conversion circuit, 4a, 4bt4c are each D-A conversion circuit 3
This is a latch circuit that supplies digital control signals for control to a t 3 b y 3 c, respectively.

On the other hand, 5 is a keyboard for inputting control level signals for inputting desired levels of volume, color saturation, and brightness, and here a keyboard having 16 4×4 key switches 5a to 5p is used. It is possible to specify 16 control levels by using the control function.

Reference numeral 6 denotes an encoder that converts the 16 types of control level signals inputted from the keyboard 5 into 4-bit digital control signals, and may be of a general circuit.
When any of 5p is operated, a latch pulse is also generated along with the digital control signal.

The generated digital control signal is applied to the switching circuit 7, which switches which of the three launch circuits 4a, 4b, and 4c to apply the signal to.

Furthermore, 8 is a selection circuit for selecting whether to control and adjust the volume, control and adjust the color saturation, or control and adjust the brightness, including a switch 8a for volume and 8b for color saturation. It is equipped with a button and a brightness switch 8c.

These three switches 8a, 8b and 8c are of a double-throw interlocking type in which only one of them is selectively turned on, and can be used as a push-button switch by adding a latch circuit to each one.

One of the switches 8a, 8b, 8c selectively supplies the latch pulse from the encoder 6 to the latch circuits 4a, 4b, 4c, and the other switches the switching circuit γ. The signal is supplied to the switching circuit 7.

Next, the adjustment control operation in such a configuration will be explained.

For adjustment, first, one of the switches 8a, 8b, and 8c is operated in the selection circuit 8 to select which of the volume, color saturation, and brightness is to be adjusted.

Here, the color saturation is adjusted as →q, and the switch 8b is turned on.

As a result, only the latch circuit 4b becomes able to latch the input, and the switching circuit 7 is switched to transmit the digital control signal from the encoder 6 to the latch circuit 4b.

Next, the user operates the key switches 8a to 8p corresponding to the desired color saturation level using the keyboard 5.

For example, if you want to adjust to the eighth level, input by operating the key switch 8b if possible.

Then, a digital control signal of '1000'' is generated from the encoder 6, and is applied to the color saturation latch circuit 4b via the switching circuit 7.
A latch pulse is generated from switch 8 of selection circuit 8.
The digital control signal is also applied to the latch circuit 4b via the input terminal b, so that the digital control signal at the eighth level is latched into the latch circuit 4b, regardless of the color saturation in the case.

Therefore, from then on, the digital control signal is converted into an analog control voltage for the 8th stage by the D-A converter circuit 3b and applied to the chroma circuit 2b, so that the color saturation level is at the level of the 8th stage. This means that the adjustment is controlled.

Of course, if you wish to adjust to a level other than this, you can operate the key switches 8a to 8p of the desired level on the keyboard 8.

If you want to adjust the volume of the main body or other volume, operate the switch 8a of the selection circuit 8 and then input the desired volume level with the keyboard 5.If you want to further adjust the brightness, operate the switch 8c of the selection circuit 8. Then, the desired brightness level may be input using the keyboard 5.

In this way, in this device, the switches 8a to 8c of the selection circuit 8 and the key switches 5a to 5 of the keyboard 5
By simply operating the P and P controls, the desired volume, color saturation change, and brightness can be immediately finely adjusted to the desired level, making it possible to achieve extremely easy-to-operate adjustments. .

Moreover, even though each of the three adjustment functions can be finely adjusted to 16 levels each, only 19 switches are required, making the configuration extremely simple and extremely practical. This makes it possible to obtain a suitable adjustment control means.

Note that various input means such as a remote control signal receiving circuit can be used instead of the switches of the keyboard 5 and the selection circuit 8, and the effect is particularly great when the present invention is implemented for remote control. be.

Moreover, the above-mentioned DA conversion circuits 3a and 3b.

3c, latch circuit 4a t 4b , 4c, :c
It goes without saying that the converter 6, the switching circuit 7, etc. may be realized by a microcomputer or the like.

Furthermore, although the above embodiment has been described for the case where it is implemented to control the volume, color saturation change, and brightness applied to a television receiver, the present invention can also be applied to any device by pressing a button to control the It can be widely implemented when controlling multiple types of adjustment functions.

As detailed above, according to the present invention, the adjustment function to be controlled is selected by the selection circuit, the level signal inputted from the common input means is selectively latched by the latch circuit for each adjustment function, and the output is is converted from D to A and applied as an analog control voltage to the controlled circuit, so it has a simple configuration with a small number of input means, and is practical because it allows easy and detailed control of many controlled circuits. We were able to obtain an extremely effective device.

[Brief explanation of the drawing]

The figure is a block diagram of a control device according to an embodiment of the present invention. 1...Television receiver circuit, 2a...
・Audio circuit, 2b...Chroma circuit, 2c...
...Video circuit, 3a, 3b, 3c-
DA conversion circuit, 4a. 4b, 4c...Latch circuit, 5...Keyboard, 6...Encoder, 7...
Switching circuit, 8...Selection circuit.

Claims (1)

[Claims] 1 A plurality of controlled circuits controlled by analog control voltages, a plurality of D-A conversion means each generating an analog control voltage to be applied to the plurality of controlled circuits, and a plurality of D-A conversion means a plurality of latch means for supplying digital control signals for controlling the conversion means; a common input means for inputting control level signals for controlling the plurality of controlled circuits; and a control input from the input means. encoder means for converting the level signal into a digital signal;
a selection means for inputting a selection signal indicating which of the plurality of controlled circuits is to be controlled, and a digital control signal from the A/D conversion means to the plurality of latch means in accordance with the selection signal; A control device characterized by comprising: switching means for selectively supplying the supply.