CN2240739Y - Colour display television accessory for computer - Google Patents

Abstract

The utility model relates to a colour display television accessory for computers, which is used on a computer colour display for watching television broadcast programs. The colour display television accessory for computers comprises a television signal receiver and a signal switching plate connected with the television signal receiver. The television signal receiver is independent of a computer mainframe, and the signal does not need processing through the mainframe so that the interference of the computer is reduced; the independent television signal receiver can receive and process an analog television signal so that the loss of high frequency component is avoided to make the television programs which are displayed by the computer colour display clear and vivid. The independent television signal receiver comprises an infrared remote control receiver and a remote control emitter, wherein, the infrared remote control receiver is connected with the independent television signal receiver. The utility model has the advantages of convenient installation and operation, and low cost.

Description

A kind of computing machine colour display screen TV Mk

The utility model relates to and utilizes the teleview technology of broadcast program of computer color display, a kind of specifically computing machine colour display screen TV Mk.

At present, utilizing computing machine colour display screen TV reception mainly is to pass through multimedia technology, promptly utilize a TV signal receiver (as video recorder, sound-track engraving apparatus) to receive the simulating signal of TV station's emission, be that the digital data transmission that can handle of computing machine is to main frame by the TV card that is plugged in the computing machine with the analog signal conversion that receives again, the switch dish carries out that sequencing is handled, monitoring as calculated, thus on the computing machine colour display screen display of television programmes.The major defect of this device is: 1, the analog signal conversion of the TV station that receives being sent by TV card is in the digital signal processes that can handle of computing machine, can produce losing of high fdrequency component, causes distorted signals, makes image unintelligible; 2, after the TV card conversion, be transferred to the digital signal of computing machine, need by Keyboard Control, could show through the mainframe program processing, that is to say, when utilizing computing machine to teleview, main frame is in running order always, so just has the interference to TV signal, influences the serviceable life of main frame; 3, the computing machine of selling on the market is higher with the TV card price, is unfavorable for applying.

The purpose of this utility model is that a kind of computing machine colour display screen that can make that designs in order to overcome defective of the prior art televiews, and it is clear image, true to nature, and easy for installation, cheap, be suitable for and apply, do not influence the computing machine colour display screen TV Mk that main frame uses.

The purpose of this utility model realizes by following measure:

Computing machine is made up of reception, the TV signal receiver of handling television broadcasting signal and the signal switch boards that is attached thereto with colour display screen TV Mk, its TV signal receiver is to be independent of outside the main frame, do not link with main frame, TV signal receiver also comprises infrared remote control receiver and the remote control transmitter that is attached thereto, be used for the Management Television signal receiver, the switch boards that TV signal and computing machine shows signal are switched mutually is installed in computer color display.

The purpose of this utility model also realizes by following measure:

TV signal is installed on the switch boards looks and put pipe Q1, Q2, Q3, the TV signal of input is amplified the back for kinescope.TV signal is looked R, the G caption signal of putting pipe Q1, Q2, Q3 emitting stage connection remote control panel.TV signal is looked and is put pipe Q1, Q2, Q3 output terminal connection two keys relay JR1, JR2, two keys relay JR1, the JR2 other end connect computing machine R, G, B signal, respectively colour TV signal cutter relay J R1, the JR2 other end are connected computing machine R, G, B signal, respectively colour TV signal and Computer signal are switched.Two keys relay JR3 connects TV synchronousing signal respectively and computing machine is capable, the field synchronization circuit, and its signal is switched.

Relay driving tube Q4 is installed on the switch boards, and its input end connects the TV signal receiver power supply, and output terminal connects the control input end of two keys relay JR1, JR2, JR3, when the TV signal receiver energized, finishes switching immediately.

The capable field flyback signal H of graphoscope, V output terminal connect with TV signal receiver and infrared remote control receiver respectively.

Advantage of the present utility model is as follows:

Utilizing independently, TV signal receiver receives, handle, control, switch TV signal, and overall process all is a simulating signal, having avoided analog signal conversion is that the high fdrequency component that digital signal causes is lost, and the TV programme that the computing machine colour display screen is shown is clear, true to nature.Simultaneously, TV signal is that the change-over switch by switch boards is transformed on the colour display device of computing machine, do not need to handle and control by main frame, make main frame be in the state of " shutdown ", thereby reduced the interference of computing machine, prolonged the serviceable life of main frame relatively TV signal, and saving electric energy, particularly easy for installation, cheap, be suitable for and apply.

The utility model description of drawings is as follows:

Fig. 1 is the infrared remote control receiver wiring diagram;

Fig. 2 is the TV signal receiver wiring diagram;

Fig. 3 is switch boards and computer color display circuit diagram;

Fig. 4 is a block diagram of the present utility model;

Wherein: A is the infrared remote control receiver part; B is the TV signal receiver part; C is switch boards and computer color display part.

Below in conjunction with accompanying drawing the utility model embodiment is further described:

Among Fig. 4 independently TV signal receiving processor B be a signal plate, it is connected with receiver of remote-control sytem A, and be installed in (can be mainframe box) in the same casing, switch boards C also is connected with signal plate B with receiver of remote-control sytem A respectively, wherein: receiver of remote-control sytem B is by microprocessor 1, storer 2, ac dump on-off circuit 3, infrared controlled amplification and rectification circuit 4, frequency range, tuning voltage form circuit 5, State Control voltage generation circuit 6, blanking synchronously, signal input circuit 7, control captions buffer circuit 8, remote control dash receiver power supply 9 is formed.Signal plate B can make with reference to " Toshiba " two-chip computer, it is by TV signal receiving tuning device 10, tv-if signal, audio signal treatment circuit 11, separated in synchronization, colour, brightness scan process circuit 12, number plate power supply 13, audio power amplifier circuit 14 and loudspeaker are formed.Switch boards C is by TV signal video amplifier circuit 15, and synchronizing circuit 18 imported by chromoscan output circuit 16, colour display screen video amplifier circuit 17, colour display screen computing machine and switching switch circuit 19 is formed.

All operations function of the present utility model all concentrates on the remote control transmitter, and being connected by receiver of remote-control sytem and signal plate, realization is controlled and is changed the anolog TV signals that signal plate receives, separated in synchronization on the signal plate, it is red that color intensity scan process circuit 12 is exported, green, blue three rifle signals and luminance signal are connected on the TV signal video amplifier circuit 15 of switch boards, simultaneously, receiver of remote-control sytem is connected with TV signal video amplifier circuit 15 with the switching switch circuit 19 of switch boards again, realization is to TV signal, the control and the switching of colour display screen signal and row field sync signal are shown on the colour display screen screen of computing machine thereby make signal plate receive the TV signal of handling.

Remote control transmitter adopts 31 key infrared, and transponder pulse is carried out exercises by receiver of remote-control sytem decoding back.This telepilot adopts Philip international standard circuit, and its price is low, function complete, dependable performance.Can realize automatic search tuning, store 90 programs, timing shutdown, quiet, the no signal shutdown, the TVIAV conversion, during analog quantity is returned, brightness, volume, contrast, colored control function.

Fig. 1 is the receiver of remote-control sytem circuit.IC01 is that remote control processing CPU, IC04 are wave band control for status register IC03, and IC02 is analog quantity PWM conversion.The complete machine principle of work is as follows: P06 is the receiving transducer socket, and received signal is delivered to 35 pin of IC01, and it is deciphered and carries out.By storage key information is deposited in IC04.P05 provides row, field, same not signal for this machine, and from the J05 of Fig. 3 switch boards, signal makes receiver of remote-control sytem and signal system co-ordination.P04 is the indication of remote control captions, receives switch boards and looks and put emitter.IC03 is that wave band switches tuner and uses TDQ-3BL, BH, three kinds of frequency ranges of BV, and IC03 connects with 7,8 of IC01, and when IC01 imports two well system sign indicating numbers, BL, BH, BV wherein a frequency range are+12V.P02 is connected to signal plate, and 1 pin of P02 is the tuning voltage input, and 9 pin of P02 are realized AV/TV control for AFC voltage input, 8 pin of P02, and IC02 is that PWM converts analog quantity to, and it is made up of four operational amplifiers.Four kinds of control of P01 output voltage is received TV signal receiver J01, and Q6 drives the JRC switching on and shutting down.

Fig. 2 is the TV signal receiver circuit, and its output red, green, blue and luminance signal is finished the processing of TV signal.TV signal is imported by tuner TDQ-3, output intermediate-freuqncy signal IF is to Q1 buffering compensation amplification, output to surface acoustic wave SAW again, SAW deliver to after to signal filtering IC201TA7680 7., 8. pin, 16,17,18,19 pin are that image intermediate frequency signal is tuned in 38M, guarantee amplitude versus frequency characte and signal sensitivity.10 pin are that AGC adjusts, and guarantee at strong and weak signals hypograph uniform quality, and 11 pin output AGC controls voltage to the AGC terminal of TDQ-3.14,13 pin are AFC voltage, output to the AFC end of TDQ-3, and it is that output control voltage makes frequency lock, guarantees image effect.22,24 pin are that sound accompaniment is tuning, are tuned at 6.5M.3 pin output signals are to the IC301 audio power amplifier.15 pin are the composite video signal output terminal, and one road to 21 pin carries out sound demodulation, one road to IC501 39 pin.IC501 is colored, sweep signal processing integrated package.The TV signal that the 40 pin output paraphase of IC501 is amplified, one the tunnel is input to 37 pin through R51, R52, C44, C47, D8 carries out separated in synchronization, 36 pin output synchronizing signal is received 2 pin of P08 then, 1 pin of P08 is received in output behind R70, C56 integration, form field sync signal, another road is selected colour burst signal and is outputed to 5 pin behind C20, C53, C12 trap.42 pin output luminance signal is input to 3 pin through L10 luminance delay, receives Q2 from 23 pin output brightness then, outputs to look after Q2 amplifies and puts grade P07 1..6 to 19 pin of IC501 are the look treatment circuit, comprise that colored colour burst signal is selected, automatic phase control, the recovery of colour subcarrier and 1 row of comb filter postpone.To the last export R, G, three kinds of colour difference signals of B are finished colour decoding to switch boards.IC301 is the power amplifier amplifying circuit, output sound signal.P07 is three rifle signal and brightness, and the J07 of Fig. 3 is received in output, realizes the input of putting level to looking.P08 output row field sync signal offers switch boards, meets J08, and P09 provides Fig. 1 inverse-range signal from the J09 of Fig. 3.

Fig. 3 is the switch boards wiring diagram.It finishes the switching of colour TV signal and Computer signal, makes dual-use.Q1, Q3, Q3 are that TV signal is looked and put pipe, and the TV signal of J07 input is amplified output.J04 is R, the G caption signal of remote control panel input, and it is connected respectively to the emitting stage of Q1, Q2, and empty frame table is shown in original circuit in the graphoscope.JR1, JR2 are two keys relay, respectively colour TV signal and Computer signal R, G, B are switched.JR3 is synchronous to TV synchronousing signal and computing machine, and row, field synchronization are switched, and 2,1 pin of J08 is the capable field flyback signal that extracts from display, and the one, receive the P08 of Fig. 1, the 2nd, receive the P05 of Fig. 2.Q4 is contrary electrical equipment driving tube, 3 pin of J08+12V voltage is the power supply of TV signal receiver, display is in the static display state at ordinary times, opens TV power supply when one, just finishes the switching of dual mode, realizes colour display screen, TV functions.

Line totally ten pairs of grafting between each circuit of Fig. 1, Fig. 2 and Fig. 3, the wiring relation is that P01 meets J01, P02 meets J02 ... Deng, meet J09 up to P09, wherein P10 is connected to the synchronizing signal of computing machine input, and P06 receives the telepilot receiving transducer.

Claims (4)

1. a computing machine is made up of the signal switch boards that is used to receive, handle the TV signal receiver of television broadcasting signal and be attached thereto with colour display screen TV Mk, it is characterized in that:

A. its TV signal receiver is to be independent of outside the main frame, does not link to each other with main frame;

B. TV signal receiver comprises the infrared remote control receiver that is attached thereto;

C. infrared remote control receiver has a corresponding with it remote control transmitter;

The switch boards that TV signal and computing machine shows signal are switched mutually is installed in the computer color display.

2. a kind of computing machine according to claim 1 colour display screen TV Mk, it is characterized in that: TV signal is installed on the switch boards looks and put pipe (Q1, Q2, Q3), TV signal to input is amplified, TV signal is looked and is put pipe (Q1, Q2, Q3) emitting stage connects the R of remote control panel, the G caption signal, TV signal is looked and is put pipe (Q1, Q2, Q3) output terminal connects two keys relay JR1, JR2, two keys relay (JR1, JR2) other end connects computing machine R, G, the B signal, respectively colour TV signal and Computer signal are switched, two keys relay (JR3) connects TV synchronousing signal respectively and computing machine is capable, the field synchronization circuit switches its signal.

3. according to claim 1,2 described a kind of computing machines colour display screen TV Mks, it is characterized in that: relay driving tube (Q4) is installed on the switch boards, its input end connects the television signal system power supply, output terminal connects the control input end of two keys relay (JR1, JR2, JR3), when the TV signal receiver energized, promptly finish switching.

4. a kind of computing machine according to claim 1 colour display screen TV Mk, it is characterized in that: the capable field flyback signal H of graphoscope, V output terminal connect with TV signal receiver and infrared remote control receiver respectively.

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