JPH03187635A - Pulse width information transmission controller - Google Patents

Abstract

PURPOSE:To uniformly control each equipment by converting an analog signal into a digital signal for control, transmitting the converted signal to each equipment and generating a pulse with the same means at each equipment. CONSTITUTION:A pulse width control DC voltage generating section 1 generates an analog signal (DC voltage) 6 proportional to a pulse width required finally, converts the signal into a serial digital signal 8 through an A/D conversion section 2 and a parallel/serial conversion section 3 and the resulting signal is sent to a data bus 9 from a serial signal transmission section 5. A reception section 11 at a reception side regenerates a serial digital signal 16, a serial/ parallel conversion section 12 regenerates a parallel digital signal 17 and inputs the result to a pulse generating section 13 to generate a pulse 18 proportional to the original control DC voltage. Thus, the pulse signal having a pulse width proportional to a transmission side DC voltage is obtained. Then lots of instruments are uniformly remote-controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pulse width information transmission control device, and in particular, the present invention relates to a pulse width information transmission control device, and in particular, to control the brightness of a light emitting diode (LED) or an LED display device by several thousand.
The present invention relates to a pulse width information transmission control device that transmits pulse width information necessary for uniformly remote controlling a large number of devices over a twice as wide range and more accurately.

[Conventional technology]

Conventionally, there was no technology that could remotely control the brightness of a large number of devices uniformly by accurately transmitting light over a wide range several thousand times as large as this. Therefore, in order to control the brightness of the display of each device over a wide range, it is necessary to have a control circuit for each device and control each device individually.

[Problem to be solved by the invention]

This has the drawback of complicating the operation of the device and increasing the workload of the operator.

[Means to solve the problem]

In the present invention, a control signal for brightness adjustment is generated from one location, converted to a serial digital signal,
Each device converts the received serial digital signal into a parallel signal, and converts this parallel signal to the same frequency as each device with the same number of bits. By inputting it as a preset signal of a digital counter using the clock of Then, you will get the same repeat pulse.

〔Example〕

FIG. 1 shows an embodiment of the present invention.

The pulse width control DC voltage generator 1 generates an analog signal (DC voltage) proportional to the pulse width that will ultimately be required.
6 is generated and converted into a parallel digital signal 7 by the analog/digital converter 2. Further, it is converted into a serial digital signal 8 by a parallel/serial converter. A clock signal from the clock generator 4 is used for these signal conversions. The converted signal is sent from the serial signal transmitter 5 to the data bus 9.

On the receiving side, a receiving section 11 receives the signal from the data bus 9, reproduces the serial digital signal 16, and further reproduces the parallel digital signal 1 through the serial/parallel R conversion $12.
Play 7. In reproducing this signal, a clock from the clock generator 14 having approximately the same frequency as that on the transmitting side is used. The reproduced parallel digital signal 17 is sent to the pulse generator 13
to generate a pulse 18 proportional to the original control DC voltage.

As shown in FIGS. 3 and 4, the pulse generator 13 is configured to compare the output of the digital counter with a parallel digital signal and output the difference between a digital counter that operates in a suitable lock manner and a parallel digital signal. In some cases, it is possible to obtain a pulse signal with a pulse width proportional to the DC voltage on the transmitting side.

FIG. 2 shows another embodiment in which a control signal is generated by combining a DC voltage generator for pulse width control and a control signal generator using a digital switch.

In FIG. 2, the digital switch 10 switches P/
An MSB group is created from the data signal supplied to the S converter 3, and an LSB group is created from the data signal from the A/D converter 2.

Therefore, the DCC voltage generator will share the fine adjustment function. Furthermore, in FIG. 2, it is clear that the object of the present invention can be achieved even if the DC voltage generating section is eliminated and the control signal is generated only by a digital switch.

〔Effect of the invention〕

As explained above, by converting analog signals for control into digital signals, transmitting them to each device, and generating pulses in each device using the same means, it is possible to create pulses with less variation, and each device can be uniformly distributed. can be controlled.

[Brief explanation of drawings]

FIG. 1 is a diagram showing one embodiment of the present invention, and FIG. 2 is a diagram showing a second embodiment in which a part of the pulse width signal generating section uses both an analog signal and a digital signal. 3 and 4 are diagrams showing an example of the configuration of the pulse generator 13 shown in FIG. 1. ■・・・DC voltage generator for pulse width control, 2...
...Analog/digital conversion section, 3...
Parallel/serial converter, 4... Clock generator, 12... Serial/digital converter,
13...Pulse generator.

Claims (2)

[Claims] (1) means for converting an analog signal such as a DC voltage into a digital signal, means for converting the parallel signal of the digital signal into a serial signal and sending it to a data bus, and receiving the signal transmitted via the data bus. means for converting a serial signal into a parallel signal; and a means for converting a serial signal into a parallel signal;
1. A pulse width information transmission control device comprising: pulse generation means for generating a pulse with a pulse width proportional to an analog signal such as a C voltage. (2) The pulse generation means includes a counter having the same number of output bits as the number of bits of the parallel signal, and comparison means for comparing corresponding bit signals of the counter output and the parallel signal. A pulse width information transmission control device according to claim 1.