At present, existing large screen display system mainly is made up of CRT, LED and bulb.Forming large screen display system by CRT and LED all can't compare with bulb system on price and high brightness.Through Patent Office of the People's Republic of China retrieval following patent documentation CN86206473U, CN208321U, United States Patent[11 are arranged] 4386351 [11] 4205312 [11] 4800375 relevant with the present invention, immediate is that the employing bulb of Nanjing College of Aeronautical Engineering development is as the multi-functional timing of the computer of display element, the large screen display system of scoring.See Nanjing College of Aeronautical Engineering journal V01,22, NOlP90-97(1990 for details).This system is at present domestic comparatively advanced large screen display system.It is a kind of large-scale image display system that is used in stadium (shop).It by monochromatic autobulb as light-emitting component, with many Z-80 single card microcomputers to the control that distributes of the Push And Release state of bulb.This system in use shows, all meets match requirements such as international basket, vollyball in the demonstration of Chinese character, western language, timing and scoring, has reached advanced international level in homogeneous system.If further improve requirement, as the real-time demonstration of coloured image, then this system just exists the deficiency that needs change: (1) can't carry out colour and show, this is because this system has only adopted monochromatic bulb as single display unit; (2) image that can not have a gamma characteristic shows that this is because this system drive signal only is to showing that bulb carries out switch control, makes display unit have only two states; (3) lack real-time, this is because this system has carried out coding in advance to character display commonly used, call by display routine, and can't be by routine call to figure or the picture signal (as standard television signal) that can't predict and encode in advance, therefore lack real-time, cause application face narrow.When adopting bulb to carry out the demonstration of real-time color image, must solve the frame speed of TV signal and the contradiction of the luminous inertia of bulb, solve the problem such as synthetic of the separation of driving, primary colours, gray scale electric signal of continuous signal and primary colours, gray-level light signal.
The object of the present invention is to provide a kind of colour of can realizing to show to have the gamma characteristic image and show, in real time the dynamic images displayed display screen.
The present invention is realized by following measures: the present invention is that the basic colour gradation grading sequence addressing dynamic display screen comprises the two large divisions.A part is a main equipment room, and another part is an operation room.Main equipment room includes: video switcher, editor's main frame, peripheral control unit, video editing master switch, colour decoder, amplitude clasfficiator, analog to digital converter, sync separator, phaselocked loop, logic controller and amplification transmitter.Operation room includes: photoelectrical coupler, pulse shaper, logic controller, frame memory, address switcher, shift register, latch, driving array and bulb dot matrix.The annexation of main equipment room: video switcher receive by multi-channel television video camera picked-up vision signal select with switch after, outputting video signal is to video editing master switch, export to video editing master switch-vision signal by editor's main frame simultaneously, video editing master switch outputs signal to colour decoder and sync separator, colour decoder is exported to the amplitude clasfficiator, the amplitude clasfficiator is exported to analog to digital converter, analog to digital converter is exported to the amplification transmitter, sync separator output two-way, one the tunnel exports to phaselocked loop, the amplification transmitter is exported on another road, town's ring mutually exports to logic controller 10, logic controller exports three the tunnel, one the tunnel exports to the amplitude clasfficiator, and one the tunnel exports to analog to digital converter, and one the tunnel exports to the amplification transmitter, peripheral control unit is exported to the amplification transmitter, amplifies the photoelectrical coupler that transmitter is exported to operation room; The annexation of operation room: photoelectrical coupler receives main equipment room and amplifies the signal that transmitter sends, photoelectrical coupler is exported to pulse shaper, pulse shaper output two-way, one the tunnel exports to frame memory, one the tunnel exports to logic controller (14), logic controller exports six the tunnel, one the tunnel exports to frame memory, one the tunnel exports to address switcher, one the tunnel exports to address generator, one the tunnel exports to shift register, one the tunnel exports to latch, one the tunnel exports to the driving array, address generator is exported to address switcher, address switcher is exported to frame memory, frame memory is exported to shift register, shift register is exported to latch, latch is exported to the driving array, drives array and exports to the bulb dot matrix.This display screen principle of work: the multichannel colour TV signal that on-the-spot colour camera provides, pass through video switcher, determine current on-the-spot displaying contents, and be transferred to video editing master switch, editor's main frame produces the colour TV signal of setting character display or figure and is transferred to video editing master switch, operating personnel are switched visual character display or graphic presentation on request, one road colour-video signal is transferred to colour decoder and sync separator respectively, colour decoder carries out color to colour-video signal and decomposes, solve the RGB tristimulus signals and be transferred to the amplitude clasfficiator, sync separator separates trip from the colour-video signal that receives, field step signal and strange, the idol field identification signal is transferred to phaselocked loop respectively and amplifies transmitter, phaselocked loop produces the system's reference clock with line synchronizing signal phase locking, and reference clock signal is transferred to logic controller (10), logic controller (10) carries out logical operation to reference clock signal, thereby the pulse signal that the control of generation system is required, be transferred to the classification of amplitude clasfficiator control amplitude respectively, analog to digital converter control analog to digital conversion and amplification transmitter, the amplitude clasfficiator carries out the classification of n level to tristimulus signals under the pulse control of logic controller (10) output, tristimulus signals after the classification are sampled to be converted to digital signal by analog to digital converter, this three primary colours digital data transmission is given and is amplified transmitter, peripheral control unit is directly exported control picture storing and cls signal by staff's requirement, amplify transmitter respectively to analog to digital converter, sync separator, the signal that peripheral control unit and logic controller (10) transmit amplifies, so that carry out long-distance transmissions, integrated signal after the process long-distance transmissions is received by photoelectricity coupling device and carries out electricity and isolate, and be transferred to pulse shaper and carry out waveform shaping signal, signal after the shaping is divided into two-way, one circuit-switched data signal is transferred to frame memory, another road logic control signal then is transferred to logic controller (14), produce the required various steering logic signals of total system by it, pass to frame memory respectively, address switcher, address generator, shift register, latch and driving array, control signal as each several part, address generator produces the address switchover that the required address pulse of frame memory carries out " reading " operation and " writing " operation according to the steering logic signal, at logic controller 14, address switcher signal controlling frame memory is deposited the data-signal of sending here at a high speed according to certain rules, and carry out system conversion, display data signal after the system conversion realizes serial data in shift register, and conversion, to reduce signal transmission rate, latch receives the signal that shift register is sent here, data are kept in, to adapt to the requirement that bulb shows, drive array under latch and logic controller (14) signal effect, produce the demonstration working signal of controlling and driving bulb work, and be transferred to each bulb in the bulb dot matrix respectively to finish display image, character or figure.
The present invention compared with prior art has following beneficial effect: the colored demonstration: this is owing to adopted three primary colours or four colored lights bubble to carry out the general image demonstration as single display unit, therefore, can obtain n by the different duty (n level) of controlling each bulb
3Or n
4Plant color change, thereby overcome, realized colored demonstration with the deficiency of monochromatic bulb as display unit; (2) image with gamma characteristic shows: this is to handle because the black-and-white television signal has been carried out the n level, when n 〉=2, can obtain the gray shade scale of image, thereby overcome the deficiency that only the demonstration bulb is opened or closed two states control in the prior art, realized that the image with gamma characteristic shows; (3) real-time and setting content shows: this is because the present invention is basic input signal with TV signal, in conjunction with literal and the graphing capability set, can realize the real-time demonstration of on-the-spot coloured image and the demonstration of setting content; (4) can realize that combination in any shows: this is because adopted demonstration system conversion and subregion to show, can realize with the display unit being the combination in any demonstration of unit on the basis of satisfying the bulb dynamic property; This invention can be widely used in visual demonstration of occasion large-scale tvs such as square, stadium, shop and advertisement scoreboard etc. for this reason.
Now in conjunction with the accompanying drawings to this bright being further described: the present invention includes editor's main frame (2), peripheral control unit (3), amplify transmitter (11), drive array (20), it is characterized in that it also includes video switcher (1), video editing master switch (4), colour decoder (5), amplitude clasfficiator (6), analog to digital converter (7), sync separator (8), phaselocked loop (9), logic controller (10), amplify transmitter (11), photoelectrical coupler (12), pulse shaper (13) logic controller (14), frame memory (15), address switcher (16), shift register (18), latch (19) drives array and bulb dot matrix.The video of being made up of multiway analog switch just parallel operation (1) receives by multi-channel television video camera picked-up vision signal and selects and switch the back outputting video signal is made of for video editing master switch (4) while of being made up of multi-way switch 386 microcomputers and editing machine editor's main frame (2) and be defeated by video editing master switch (4) one signals, video editing master switch (4) outputs signal to colour decoder of being made by the VCDI demoder (5) and the sync separator of being made by LM1881 (8), colour decoder (5) is exported to the amplitude clasfficiator (6) that voltage comparator is made, amplitude clasfficiator (6) is exported to by CA3318, the analog to digital converter that ADC makes (7), analog to digital converter (7) is exported to the amplification transmitter of being made by power amplifier (11), sync separator (8) output two-way, one the tunnel exports to the phaselocked loop of being made by 74HC4046 and wave filter (9), another road is exported to and is amplified transmitter (11), phaselocked loop (9) is exported to by gate circuit, the logic controller (10) that the trigger sum counter is formed, logic controller (10) output three tunnel, one the tunnel exports to amplitude clasfficiator (6), one the tunnel exports to analog to digital converter (7), one the tunnel exports to amplification transmitter (11), export to amplification transmitter (11) by the peripheral control unit (3) that Programmable Logic Controller is made, amplify transmitter (11) and export to the photoelectrical coupler that model is 41N25 (12), photoelectrical coupler (12) is exported to the pulse shaper of being made up of Schmidt trigger (13), pulse shaper (13) output two-way, one the tunnel exports to the frame memory of being made by four HM62256 (15), one the tunnel exports to the logic controller of being made up of gate circuit and trigger (14), logic controller (14) output six tunnel, one the tunnel exports to frame memory (15), one the tunnel exports to the address switcher of being made up of multi-channel data selector (16), one the tunnel exports to the address generator of being made up of counter (17), one the tunnel exports to the shift register of being made by 74LS164 (18), the latch (19) that one route 74LS373 makes, one the tunnel exports to the driving array of being made by controllable silicon, address generator (17) is exported to address switcher (15), frame memory (15) is exported to shift register (18), shift register (18) is exported to latch (19) latch (19) and is exported to and drive array (20), drive that array (20) is exported to the bulb dot matrix (21) be made up of bulb thus the basic colour gradation grading sequence addressing dynamic display screen is made.
