KR960003426A - Power cut-off circuit of decoder section of optical cable TV - Google Patents

Abstract

The present invention provides an optical cable television that operates only a telephone and an ISDN service by cutting off the power of the decoder unit when the TV and audio service are not used to reduce power among telephone service, integrated information network service, television, and audio service supported by cable television. The power supply circuit of the decoder unit of the conventional optical television system is configured to provide power at a time, which is because the telephone service and the ISDN service must always be powered, so that the television and the audio that are not provided with the service Since there is a problem of wasting power without the need, the present invention, in view of the conventional problems, the power supply of the unnecessary decoder unit is cut off when not receiving the television and audio services among the telephone, ISDN, TV, audio services supported by optical television By doing that, I The reduced power consumption has the effect of reducing the royalties for subscribers of optical cable television.

Description

Power cut-off circuit of decoder section of optical cable TV

As this is a public information case, the full text was not included.

1 is a block diagram of a power cut-off circuit of a decoder of an optical cable television according to the present invention.

2 is a circuit diagram showing a case where the power is cut off by using the power key of the remote controller.

3 is a circuit diagram showing a case where the power is cut off using a power key installed in a television and an audio panel.

Claims (3)

A broadcasting station 10 for television broadcasting, an exchanger 30 and a relay station 20 for telephone service, a distribution center 40 for inputting the signals outputted from the relay station 20 to each subscriber station apparatus in full distribution; In the power supply circuit for supplying the subscriber terminal device 50 in the service providing system consisting of the subscriber terminal device 50 for receiving a signal input from the distribution center 40 to provide various services to the user A power source 51 for supplying power to various service units in the subscriber station 50; A main control section 52 consisting of a B-channel 52 'for telephone service and a 2B + D-channel 52 "for ISDN service, and a decoder 53 for decoding to input data into television and audio; And cut off the power supplied to the decoder unit 53 by using the power key of the remote controller and the power key provided on the panel. The photodiode (52-1) according to claim 1, further comprising: a photodiode (52-1) for receiving the light emitted from the remote controller and converting it into a current when the power supplied to the decoder unit (53) is cut off by using a power supply of the remote controller; A transistor 52-2 which receives a current input from the photodiode 52-1 and performs a switching action; And a microprocessor (52-3) for outputting data input from said transistor (52-2) to a terminal corresponding to a key function of a remote control pressed. The inverter according to claim 1, wherein when the power supplied to the decoder unit 53 is cut off by using a power key installed in a television and an audio panel, the inverter inputs the signal input from the key to the flip-flop 52-5. 52-4); A flip-flop 52-5 for maintaining the current operation until a set or input is applied; An exclusive oar gate 52-6 for exclusively outputting the signal output from the PWR terminal of the signaling remote controller output from the flip-flop 52-5; A switch mode power supply 52-7 which automatically shuts off the power of the decoder 53 when a 'low' signal is input from the exclusive or gate 52-6; And a main control power supply (51-1) and a decoder power supply (51-2) connected to said switch mode power supply (52-7). ※ Note: The disclosure is based on the initial application.