KR850000040B1 - Control apparatus - Google Patents

Abstract

A control apparatus for controlling a plurality of characteristics, such as hue, color, brightness, sound and the like, of a reproduced video picture includes a transmitter having a memory for storing data entries corresponding to the characteristics to be controlled, a central processing unit to change selected ones of the stored data entries and a plurality of switches for controlling the central processing unit to change selected ones of the stored data entries in response to actuation of selected ones of the switches, whereby the transmitter transmits the stored data entries, as changed.

Description

Control device

1 is a schematic diagram illustrating one embodiment of the present invention.

2 is a schematic diagram showing part of the invention, in particular the transmitter of the invention;

3A to 3C are diagrams for explaining pulses and data used in the present invention.

4 to 7 are diagrams for explaining the function of the present invention.

8, 9 and 11-13 are another part of the present invention. Particularly, the configuration diagram of each receiver.

10 is a graph showing a power supply voltage versus time characteristic curve used to illustrate a portion of a receiver of the present invention.

14 is a graph showing the voltage band control step characteristics used to explain the present invention.

The present invention mainly relates to a control device, and more particularly to a novel control device suitable for an integrated circuit configuration, and the present invention also relates to a control device suitable for use in a color television receiver requiring a lot of control. In a color television receiver, controls according to user selection, or adjustments, generally relate to loudness, tone, hue, color, picture (contrast and color), brightness, sharpness, and the like. On the other hand, while shipping color television from the factory, the manufacturer normally adjusts the luminance knob to the standard position, the hue knob to the standard position, and the contrast knob to the standard position. Adjust so that is set to the standard position.

These adjustments are typically adjusted by variable resistors. Therefore, when the television receiver is configured in the form of an IC (integrated circuit), these variable resistors must be attached to the outside of the IC, so that the effects and advantages of the IC configuration will be greatly reduced. In addition, the variable resistor is a movable inflatable, so the reliability of the variable resistor is low and expensive. Because the variable resistor is relatively large, the design tolerance of the television receiver is small. In addition, it is difficult to adjust the variable resistor by the remote control operation.

Moreover, when the television receiver is tuned at the factory, this adjustment is made only at the rear of the receiver. Therefore, if the technician in the factory tries to adjust the receiver while looking at the screen, the adjustment will be rather difficult. Accordingly, an object of the present invention is to provide a control device capable of eliminating the above defects, to provide a control device suitable for controlling many functions, and to control the circuit to be pre-set to be controlled to a predetermined state. To provide a device.

For this reason, in the present invention, since the switches are provided corresponding to the required control function, each control is possible by the output of the corresponding switch. For example, when the up-switch of the loudness is pressed once, the loudness increases by one step. In this case, the data at the switch output is continuously transmitted to the receiver via a single line.

The above and other objects, features and advantages of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings. In FIG. 1, the tuner 11 is in the form of electronic tuning in which the variable capacitor diode is provided as an equalization element and is applied to the tuner 11 so as to be able to receive a VHF or UHF channel given a tuning voltage. A tuning voltage forming circuit 41 is provided in which numerical information of a predetermined channel is applied through the channel select switch 42 to form a tuning voltage corresponding to such a channel. This tuning voltage is applied to the tuning device 11 to select the predetermined channel. The tuning voltage forming circuit 41 stores a channel currently being received when the power supply is turned off, and has a function of applying the tuning voltage of the stored channel to the tuner 11 when the power supply is turned on.

Reference numeral 43 denotes a remote control signal receiving element, i.e., an infrared receiving element in the case of a remote control in the form of an infrared ray, for example, and numeral 44 denotes a remote control signal receiving circuit. The remote control signal from the receiving element 43 is applied to the receiving circuit 44 where the remote control signal is decoded to provide a signal for channel selection and the decoded signal is applied to the circuit 41 to form a tuning voltage. . The intermediate frequency signal from the tuner 11 is applied to the video detection circuit 13 through which the color video signal and the SIF (audio intermediate frequency) signal are demodulated through the VIF (video intermediate frequency) amplifier 12. The color video signal is applied to the video processing circuit 14 to be separated into a brightness signal and a chroma signal. The dichroic signal is used to demodulate the chrominance signal and then mixed with the luminance signal to provide three primary color signals. These primary color signals are then applied to the color image tube 16 through the video output circuit 15 to provide a color image.

The SIF signal from the video detection circuit 13 is applied to the voice detection circuit 22 through the SIF amplifier 21 to demodulate a voice signal, i.e., an audio signal, after which the voice signal is preamplifier 23 and the main amplifier 24. It is applied to the speaker 25 through. The video signal from the video detection circuit 13 is also applied to the sync separation circuit 31 to separate the horizontal and vertical sync pulses. These horizontal and vertical sync pulses are applied to the horizontal and vertical oscillation circuit 32 to form horizontal and vertical oscillation signals, and the horizontal and vertical oscillation signals are deflected through the vertical deflection circuit 33 and the horizontal deflection circuit 34. Are respectively applied to (35). In this example, reference numeral 36 denotes a high voltage generating circuit. For example, when the object to be controlled is the voice size, an electronic level control circuit is provided on the voice visual line of the preamplifier 23, and the voice size is applied to the level control circuit so that the analog control voltage changes the level of the voice signal. Can be adjusted. In a similar manner, electronic level control circuits corresponding to respective control objects (different from the voice level) are provided to the preamplifier 23 and the video processing circuit 14 to adjust the control objects as analog control voltages. In this example, each circuit surrounded by a dotted line is formed as an IC (direct circuit).

Reference numeral 50 represents a transmitter for transmitting data of the control objects as described in the beginning by switching operation, and 100 represents a receiver to which the data is applied to form an analog control voltage for adjustment. In this example, the transmitter 50 uses a micro-computer as shown in FIG. In Fig. 2, reference numeral 51 denotes, for example, a 4-bit CPU (central processing unit), and 52 denotes a ROM (read only memory) in which a program of circulation degree as shown in Fig. 4 is recorded. (53) denotes a RAM (equivalent constant call memory) for the work memory area, 54 denotes a data bus Bus and 55 denotes a bungee bus, respectively. In addition, reference numeral 56 denotes a nonvolatile memory for storing all data of the control target, and 61 to 65 denote four-bevel parallel input and output stages having latch functions, respectively, and 66 denotes a serial output stage. Indicates.

In the case where the microcomputer is in the form of a so-called single chip, the circuits 51 to 55 and 61 to 66 are formed as a single chip integrated circuit. In FIG. 2, reference characters S ₀ to S ₁₅ represent switches for performing the adjustment of the above-mentioned control objects and Sm represents all switches. The switches S ₀ to S ₁₅ are in a matrix arrangement and pulses for key scanning from the CPU 51 are applied to the switches S ₀ to S ₁₅ via the output terminal 61 and the outputs of the switches are input via the input terminal 62. Is applied to the CPU 51. Since all switches Sm change in accordance with the adjustment mode of the user and the adjustment mode of the manufacturer, the switches S ₀ through S ₁₅ change according to the adjustment contents as shown in FIG. In this case, the switch S ₁₄ to be operated is used to set the color, color tone, luminance and image to a standard state and the switch S ₁₅ is used to provide voice muting on and off in all its operations.

가 턴오프(빠른모드)될때, 스위치들 S₀내지 S₁₅의 어떤 것에 대한 모든 작동에서, 대응하는 제어대상은 최대 또는 최소로 된다. 참조숫자(71)는 전력공급원이 스위치 온 됨에 따라 CPU (51)를 최초로 리셋시키기 위한 최초 리셋회로를 나타내며 (72)는 스위치가 작동함에 따라 삑하는 소리를 내기 위한 버저를 나타내며 (73)은 LED (발광 다이오드)를 나타낸다.The reference character St stands for the test switch. When the test switch St is turned on (normal mode), in all operations of any of the switches S ₀ to S ₁₅ , the corresponding control object changes by one step. Meanwhile, switch S

When is turned off (quick mode), in all operations of any of the switches S ₀ to S ₁₅ , the corresponding control object is at its maximum or minimum. Reference numeral 71 represents an initial reset circuit for initially resetting the CPU 51 as the power supply is switched on, 72 represents a buzzer for beeping as the switch is activated, and 73 represents an LED. (Light emitting diode) is shown.

In order to switch the AGC for the VHF reception mode and the UHF reception mode, the tuning voltage forming circuit 41 provides a band indication signal of "0" in the VHF reception mode and "1" in the UHF reception mode, and the two band indication signal is input to the input terminal. Is applied to (63). In addition, the remote control signal receiving circuit 44 provides a signal for commanding the adjustment of the control object, which is applied to the input terminal 63. In this example, this command signal has the same form as the output of the switches S ₀ to S ₁₅ and can be obtained only once for every operation of the transmitting unit of the remote control. The oscillation circuit 32 provides an erasing pulse P _b which is "1" during the horizontal erasing period t _h and the vertical erasing period t _v as shown in FIG. 3A and this pulse P _b is applied to the input terminal 65. When data is transmitted from the transmitter 50 to the receiver 100, the erase pulse P _b is used as its own clock. As a result, this pulse P _b is also applied to the receiver 100. As shown in FIG. 1, pulse P _b is also applied to video processing circuit 14 to provide a burst indication.

The data is transferred directly to the receiver 100 via the output stage 66 and the transmission data type is made as shown in FIG. 3C for example and the contents of the control objects contained therein are shown in FIG. That is, the data of all the control objects are combined into one set as shown in FIG. 3C and the data set is transferred from the output end 66 to the receiver 100. In the case of a data set, the data order of the respective control objects and the number of bits included in each data are selected as shown in FIG. Furthermore, as shown in FIG. 3C, the data set has a level of "1" at the beginning and is appended with 4 bits of guide bits, and has a latch bit of 4 bits at the end with a level of "1". In this case, data is delivered continuously from the LSB (least significant bit).

The time alignment in data transfer from the output stage 66 to the receiver 100 is selected as shown in FIGS. 3A and 3B. In other words, after the CPU 51 completes the data transfer preparation, the data is transferred with the start of the guide pulse synchronous with the horizontal erase pulse following the end of the first vertical erasing period t _v . Thereafter, in operating the switches S ₀ to S ₁₅ or the remote control, the CPU 51 changes only the data of the control object according to the ROM 52 and then the data of all objects are transmitted to the receiver 100. The operation relations of the steps of the program recorded in the ROM 52 are shown in FIG. 4 for clarity.

As soon as the power supply is switched on, the initial reset circuit operates to reset the computer, or transmitter 50.

[202] The input / output terminals 61-66 and the like are in their initial state, or preset.

Data of all the control objects are read from the nonvolatile memory 56 and applied to the receiver 100 from the output terminal 66 in the form and timing of FIG. This data transfer is performed several times in consideration of the stability of switching on the power supply. Therefore, at the time when the power supply is turned off according to the above steps [201] to [203], the television receiver is set to a loudness or similar state and remains in this state until the next data is delivered.

[211] When any of the switches S ₀ to S ₁₅ is activated, data transfer is possible only once even if this switch is pressed in succession. This step operates to set the marker for this operation, so the marker F becomes " 0 ". When F = "9", data transfer is allowed.

[212] The judgment is made as to whether any of the switches S ₀ to S ₁₅ is active and when the judgment is "yes", i.e., activated, the step jumps to [221] and "no", i.e. When the step proceeds to step [213].

A judgment is provided as to whether or not the remote control output signal is being obtained from the receiving circuit 44. If the judgment is YES, step jumps to [223] and if no, step proceeds to [214].

A judgment is provided as to whether or not the band changes between VHF and UHF by the band indication signal supplied from the tuning voltage forming circuit 41. If the judgment is "yes", the step jumps to [241], and if "no," the step returns to [211]. Thus, when the operation is not performed in the television receiver, the CPU 51 performs the operations of [211] to [214] repeatedly so that data will not be delivered to the receiver 100 and voice volume and the like will be described above. Will maintain state.

This is a step for determining whether data is transmitted according to the value of the display letter F. If F = "0", the step jumps to [212]; if == "0", the step goes to [222].

[222] The display letter F is set to "1".

As will be described later, data to be controlled is generated as long as they correspond to the switches S ₀ to S ₁₅ .S _m and S _t .

The generated data is written to the memory 56 at its own corresponding address.

Data of all the control objects are read from the memory 56 and the read data is transmitted to the receiver 100 through the output terminal 66 in the form and time alignment shown in FIG. [241] This is a step to perform the process when it is determined that the band is switched in step 214, and data for the AGC of the new reception band is generated in this step. Step [23] is arranged to have a process as shown, for example, in FIG.

The process starts from this step.

[302] A determination is provided as to whether the activated switch is the switch S ₁₄ . If the activated switch is S ₁₄ ie "yes", the step jumps to [331]. If the switch is not S ₁₄ , ie "no", the step proceeds to [303].

[303] A determination is provided as to whether the activated switch is S ₁₅ . If the judgment is yes, the step jumps to [341]; if the judgment is no, the step proceeds to [304].

[304] A determination is provided for whether the switch S _t is on (normal mode) or off (fast mode). If the switch S _t is on, the step proceeds to [311]. If the switch S _t is off, the step proceeds to [312].

The determination is provided as to whether the switch S _m is on (user mode) or off (manufacturer mode). If switch S _m is on, step proceeds to [321] and if switch S _m is off, step proceeds to [322].

A determination is provided as to whether switch S _m is on or off. If switch S _m is on, step proceeds to [323] and if switch S _m is off, step proceeds to [324].

This step is a user control step that is activated when the user adjusts one of the switches S ₀ to S _{13 shown} in the middle row of FIG. 6, that is, when the user adjusts the television in the ordinary way. Therefore, when one of the switches S ₀ to S ₁₃ is activated, the data of the control object corresponding to the activated switch is changed to raise or lower the control target step by step.

This step is a manufacturer control step that is activated when the manufacturer or service worker is shown in the right column of FIG. 6 and adjusts one of the switches S ₀ to S ₇ and S ₁₀ to S ₁₃ . When one of these switches is activated, the data of the activated switch and the corresponding control target are changed to raise or lower the control target by one step.

This is the step in which the manufacturer or service worker is shown in the middle row of FIG. 6 when adjusting one of the switches S ₀ -S ₁₃ to the fast mode. Thus, this step provides such data in which the activated switch and the corresponding control object are preset to maximum or minimum when one of the switches S ₀ to S ₁₃ is activated.

[324] This is the same step as in [323], i.e., acting when the adjustment to one of the switches S ₀ to S ₇ and S ₁₀ to S ₁₃ is performed in a fast mode, as shown in the right column of FIG. This step thus provides this data in which the activated switch and the corresponding control object are preset to maximum or minimum.

This step provides data including hue, color, image and luminance preset to respective standard values.

[341] This step is applied when voice muting is turned on and off. Each time the switch S ₁₅ is activated, the data of the voice level having the current level and the data of the voice level having the 0 level are alternately provided by this step.

[351] This process [223] is terminated. Meanwhile, the receiver 100 is configured as shown in FIG. In this example, the receiver 100 stores data for 57 bits except for the 65-stage shifting auxiliary memory 101, the first 4 bits of the auxiliary memory 101 and the last 4 bits. A latch circuit 102 for latching and a DA converter 103 for converting the output of the latch circuit 102 to an analog voltage in all control objects.

The first four-stage information data and the last four-stage information data of the seat shift auxiliary storage device 101 are sent to the AND gate 104 so that the latch pulse P1 flows out from the AND gate 104 when all the information data becomes "1". Is approved. Since the latch pulse P1 is applied to the latch circuit 102, data for 57 bits stored in the position shifting auxiliary storage 101 except for the first 4 and last 4 bits at this time is stored in the latch circuit 102. Latched.

Continuous data from the transmitter 50 is supplied in every set (65 bits) of the shifting auxiliary storage 101 and the erase pulse Pb from the oscillator circuit 32 is also supplied as the clock pulse.

In this case, after the completion of the vertical erasing period t _v, the input data is transmitted in succession to the start of the guiding bit synchronous with the horizontal erasing pulse, so that the data is sequentially transferred from the guiding bit by the erasing pulse Pb to the auxiliary storage device 101. Delivered continuously.

As soon as the complete set of data supply from the transmitter 50 is completed, the position shift auxiliary memory 101 of the receiver 100 will be filled with a set of 65-bit data. Are stored as latch bits and guide bits, respectively. Thus, latch pulse P1 is obtained at the output of AND gate 104 and 57 bits of data are latched in latch circuit 102.

Therefore, the data latched in the latch circuit 102 is successively arranged to all control objects from this order LSB as shown in FIG. 7 to form continuous data. This data is converted by the D-A converter 103 into analog voltage at all control objects. In other words, control voltages of respective control targets are obtained. Then, the control voltage of the loudness and the control voltage of the tone are applied to the electronic control circuit of the preamplifier 23 and the control voltages of the other objects are applied to respective electronic control circuits of the video processing circuit 14.

Thus, when the user turns on the power supply, the tuning voltage forming circuit 41 selects the channel set in the status of the power supply voting, and the control targets of the voice size shown in FIG. Set in the form of time when turned off by [201] to [203]. Thereafter, if no new operation or adjustment is performed, the loop from steps 211 to 214 will repeat and the state will continue.

Next, when the switch S ₀ is pressed, for example, to increase the loudness, step [223] is carried out to the present stage [223] via [212] [221] [222] and the data of the loudness level is [321]. Step by step. This data is recorded in the memory 56 by step [231], and then the data of all control objects are transferred to the receiver 100 by step [323]. Therefore, since the DA converter 103 of the receiver 100 transmits the respective control voltages and only the voice size increases by one step, only the voice size controlling the analog voltage is increased by one step.

In this case, the state of F = "1" is maintained by step [222]. Therefore, when the switch S ₀ is pressed in succession, steps [212] and [221] are repeated following step [232] and the alternation and transfer of data is performed only once even if the switch S ₀ is pressed in succession.

However, once the switch S ₀ is disconnected and pressed again, the step proceeds from [212] to [213] to [214] and then returns to [211] where F = "0" is obtained. Therefore, when S ₀ is pressed again, the step proceeds from [221] to [222] [223] and [231] to [232], so that data change and transfer are performed. Thus, for every press of switch S ₀ , the warmth magnitude increases by one step. Similarly, adjustment is performed one step in all operations when any of the other switches S ₁ to S ₁₃ is activated.

When the mode switch Sm is in the manufacturer mode, the adjustment of the right column of FIG. 6 can be affected step by step and if the test switch St returns to the fast mode, only one push of any of the switches S ₀ to S ₁₃ corresponds to the controlled object. Make max or min When the switch S ₁₄ is pressed, step [331] is performed, so that the hue, color, image and luminance are respectively set to the standard values. Furthermore, since step 341 is performed when switch S ₁₅ is pressed, the muting of the loudness is turned on and off each time switch S ₁₅ is pressed.

On the other hand, even if the transmitter 50 stops supplying data, since the erase pulse Pb is continuously supplied to the seat shift auxiliary memory 101, the data of the seat shift auxiliary memory 101 are continuously dropped from the vertical erase interval t _v . All data will be lost after the horizontal period. Therefore, before the next vertical erase interval, the position shifting auxiliary storage 101 will not obtain data from the transmitter 50. As a result, when a set of new data is applied from the transmitter 50 to the seating auxiliary storage 101, it remains in the seating auxiliary storage 101 even though the remaining old data is not the guide bit and the latch bit. Since there is no possibility that the old data will cause both the first 4 bits and the last 4 bits of the digit shift auxiliary memory 0101 to be " 1 ", an error latch pulse is obtained and the offset data is latched in the latch circuit 102.

9 is I²A portion of the exemplary circuit of the above-mentioned seat movement auxiliary memory 101, the latch circuit 102 and the D-A converter 103 in which Intergrated injection logic integrated injection logic (L) is used is shown. 9 is a diagram illustrating a connection configuration between the seat shift auxiliary memory device 101 and the latch circuit 102 for one bit, which is an LSB to be controlled. D-A converter is I²L I²Use the constant of the current amplification element of the L transistor.

Returning to FIG. 8, 105 represents a circuit for compensating the temperature characteristics of the DA converter 103 and 106 represents a dummy DA converter unit of approximately 5 bits. The compensation circuit 105 takes advantage of the fact that the syringe current I of I ² L is common to the respective DA converter units in all control objects and the temperature characteristic compensation circuit 105 is connected to the pseudo DA converter unit 106. If the pseudo DA converter unit 106 is stable with respect to temperature, the DA converter units of the respective control objects, which actually have the same characteristics as that of the unit 106, are also stable with respect to temperature.

On the other hand, even if the transmitter 50 is defective and the power supply switch is turned on, when no data is transmitted to the receiver 100, the normal screen will not be scanned or reproduced despite the normal state of the television receiver itself. In this example, a breakdown recovery circuit 107 for the transmitter 50 is connected to the latch circuit 102 in order to avoid the above defect.

In this breakdown recovery circuit 107, for example, a 12 volt power supply voltage Vcc is distributed by resistors 108 and 109 and the divided voltage is applied to the base of the switching transistor 110 for detection. . As shown in FIG. 10, the power supply voltage Vcc increases from a time when the power supply voltage is switched on to a predetermined time constant. However, when the power supply voltage is, for example, 5.3 volts or less, the transistor 110 is designed to be turned off, and when the transistor 110 is turned off, the data corresponding to the center value of the adjustment range for each control voltage is stored in the latch circuit ( Preset within 102). However, in this case of voice size, data corresponding to the minimum value, not the center value, is preset.

Therefore, when there is no data transmitted from the transmitter 50 due to the breakdown phenomenon, the data preset in the latch circuit 102 by the breakdown phenomenon recovery circuit 107 remains to reproduce the image of the preset data. In this case, the voice size is zero. Therefore, even if the transmitter 50 is defective, a normal color image can be obtained so that the defect is not mistaken as a failure to another circuit of the television receiver.

When there is no coupling to the transmitter 50, after the power supply voltage is raised, a set of data from the nonvolatile memory 56 is applied to the receiver 100 several times, so the precell data of the latch circuit 102 is written again. As mentioned above, the control operation is memorized again in the normal mode. The reason why only the loudness is not set to the center value in this case is that no noise can be generated from the speaker as soon as the power supply is switched.

Therefore, the adjustment to the respective control objects can be performed as mentioned above. In this case, in particular, according to the present invention, since the data of the respective control targets are continuously transmitted for adjustment, the video processing circuit 14 as well as the receiver 100 is added by adding only one pin to the IC for data supply. Since it can be easily formed as C, the effect of the present invention is very large.

Furthermore, since data is formed by the switches S ₀ to S ₁₅ , the reliability is high and cheap compared to the variable resistors. In addition, since the switches S ₀ to S ₁₅ can be manufactured precisely, the design tolerance of the television receiver can be taken widely. In the present invention, since data can be formed by remote control, manual control is possible.

In the case of adjustments at the factory or by service personnel, using only the mode switch Sm set to the manufacturer mode, by using the switches S ₀ to S ₁₅ provided on the front panel of the television receiver for easy operation by the user. Adjustments can be made while looking at the screen.

Furthermore, in the present invention, even though the adjustment state is generally irregular or unstable, the operation of the switch S ₁₄ alone sets the color, color tone, brightness and image to the standard state, so that one switch operation can make the irregular adjustment state to the proper adjustment state. have. Therefore, it is not necessary to operate the respective control switches in order to bring each control object into a proper adjustment state. Therefore, adjustment in the factory is very easy. The transmission signal and the receiver 100 may be formed as shown in FIG.

In this example, the transmission data of each control object is added together with ID (confirmation) data for identifying the object. For example, in the example of FIG. 11, the data of one control object is formed of 8 bits and successively transmitted data is transmitted from the LSB. In this case, the upper four bits of data are ID data and the lower four bits are control voltage data.

Thereafter, the transfer data is applied to the shifting auxiliary storage 111 to which the erase pulse Pb is applied as a clock pulse, for example, as in the above example. The transmitter 50 also provides a pulse PI to indicate the junction of adjacent control objects for all the time when a series of data having 8 bits per object is applied to the receiver 100. This pulse PI is transmitted to the receiver 100. In the receiver 100, the pulse PI is used to turn on the switch circuits (gate circuits) 112 and 113, and the ID data to be controlled is applied to the decoder 114 through the switch circuit 112. In the decoder 114, the respective control units A. B... … Provided switch circuits 115A. 115B. … The ID data is decrypted so that one switch circuit for one of the specified targets is turned on. On the other hand, the control voltage data from the subsidiary auxiliary storage device 111 is transmitted to the respective control targets through one of the switch circuits 133, in particular, the switch circuits 115A, 115B, ..., which are turned on by the readout. Is applied to the one corresponding to the provided temporary memory circuits 116A. 116B... Therefore, the control voltage data is temporarily stored in the corresponding temporary memory circuit and the output of the memory circuit is applied to one corresponding to the DA converters 117A. 117B ... provided for the respective control objects, and then to the analog voltage. Is converted. This analog voltage is applied to the electronic control circuit for the control object.

12 shows another example of the receiver 100 of the present invention. In this example, the transmission data does not include the ID data of the control object and the control voltage data is continuously transmitted in the order of each control object. Another pulse PI 'for indicating the junction of the control objects is applied from the transmitter 50 to the receiver 100.

Similarly in this example, switch circuits 122A. 122B... Temporary memory circuits 123A. 123... And DA converters 124A. 124B are provided to the receiver 100 for the respective control objects. Parallel data for each control object is applied to the receiver from the shifting auxiliary memory 121. In this example, data is delivered periodically in the order of the control object. Therefore, the pulse PI 'is applied to the ring counter 125 corresponding to the number of control objects, and the outputs of the ring counter 125 are applied to the respective switch circuits 122A. 122B... Like the control signal of the switch circuits. As a result, the switch circuit corresponding to the transferred control object is controlled to be turned on when data of the object is stored in the shifting auxiliary storage device 121.

Curves for so-called variable resistors in which the control voltage changes abruptly for a larger control amount than the linear change in the control voltage associated with the step change and slowly changes for a small control amount are suitable for adjusting the voice size. An example of the D-A converter in the above discussion will be shown in FIG.

In FIG. 13, switch circuits 131 to 134 are provided corresponding to 4-bit data, which switch circuit 131 is controlled by the state of the LSB and the switch circuit 134 is the MSB (most significant bit). It is controlled by the state of. The switch circuit 135 is arranged to be associated with the switch circuit 134 of the MSB.

In this case, when the transistor 136 is on and the transistor 137 is off, the control voltage changes as shown by straight line A in FIG. 14 in response to the step change. If both transistors 136 and 137 are on, the output current is large so that the control voltage changes as shown by dashed line B in FIG.

In this example, while the MSB is in the " 0 " state, the switch circuit 135 is switched to the state described so that the transistor 137 is in a non-conductive state. When the MSB becomes " 1 " for switching the switch circuit 134 to the " I " position, the transistor 137 is turned on because the switch circuit 135 connected with the switching circuit 134 is switched to the state opposite to the state described. .

With the above device, only the analog voltage changes slowly along line A for the lower 3 bit step change, and the analog voltage changes significantly along line B 'for the step change with MSB added and line B' is parallel to dashed line B. Do. As a result, a change approximating the D curve shown by the thick line in FIG. 14 is obtained as a whole.

As described above, according to the control device of the present invention, the following effects, i.e., advantages can be obtained.

(I) Multiple control is possible by a single transmission line.

(II) It is suitable for the manufacture of integrated circuits.

(III) Multiple variable resistors are not required.

(IV) By using common switches, user control as well as manufacturer control can be performed.

(V) If necessary, the device to be controlled can be easily preset to its standard state.

It will be apparent that many modifications and variations can be made without departing from the scope of the new concepts of the invention.

Claims (1)

A control apparatus for controlling a plurality of functions, the RAM 53 being a first memory device for storing a plurality of control data, a plurality of control switches S ₀ to S ₁₅ , and states of the plurality of control switches. In response to the CPU 51, which is a control data converter for converting each control data in the RAM, which is the first memory device, and the test for converting the amount of change of each control data by the CPU, the control data converter. Transmitter 50, which is a control data transmission device, and a latch circuit 102, which is a second data storage device, for continuously transmitting a switch S _t and control signals corresponding to the plurality of control data in RAM, the first storage device. And a control data receiving device for receiving the continuously transmitted control data and storing the received control signals in a latch circuit which is the second memory device. A plurality of DA converters for generating a plurality of analog control voltages corresponding to the plurality of control data in response to the auxiliary storage device 101 and the control signals stored in the latch circuit as the second storage device. 103) and a video processing circuit (14) which is a plurality of voltage controlled devices for controlling the plurality of functions in response to the plurality of analog control voltages from the plurality of DA converters.

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