CN2588707Y

CN2588707Y - Device for playing TV signal by LED display screen

Info

Publication number: CN2588707Y
Application number: CN 02293374
Authority: CN
Inventors: 刘义雄
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-23
Filing date: 2002-12-23
Publication date: 2003-11-26
Anticipated expiration: 2012-12-23

Abstract

The utility model provides a device using an LED display screen to play TV signals, which belongs to the technical field of information broadcast, information transmission and information display. The device comprises a television receiver, an A/D converter and an LED display screen, wherein the television receiver receives simulated TV signals and converts the signals into simulated RGB signals and synchronizing signals, and the A/D converter is provided with a phase-locked loop circuit, receives the simulated RGB signals and the synchronizing signals output by the television receiver and converts the signals into digital RGB three primary color grey scale data and control signals for the LED display screen to broadcast. By the utilization of the utility model, the LED display screen can carry out network interconnection with lower cost by using a television station as the broadcast control center. The display screen can be arranged in the bustling streets in cities, which can develop social public information resources and facilitate the popularization propagation of public information.

Description

A kind of device of playing TV signal with LED display

Technical field

The utility model relates to a kind of device with LED display broadcast TV signal, belongs to broadcast, transmission, the Display Technique field of information.

Technical background

In the prior art, place the LED display system of busy section of town, generally computerized control, at first computer receives the vision signal from VCD, DVD, TV station, video camera or the like, computer converts the vision signal that receives to digital signal then, this digital signal converts the required RGB three primary colors data of LED display at last to, becomes image and broadcasts.This system block diagram as shown in Figure 1, its shortcoming is:

1. the editor of information, control, broadcast are all carried out in computer, and the memory space of information is restricted.

2. the distance between computer and the display screen is restricted, and transmission range farthest has only 300 meters.

3. the outdoor LED display screen major part is arranged on bustling location, because transmission range is restricted, must rents a house as the control room near display screen, thereby strengthen the broadcast cost.

4. the distance owing to transmission is restricted, thereby the information coverage of display screen polylith networking is restricted.

5. transmission line adopts cable or netting twine, need drive circuit and long line receiving card, increase cost on the one hand, on the other hand, owing to connect more complicated, if it is mishandling, a connector, a bit of cable, even the wiring on the printed circuit board (PCB), the capital influences play quality, and the maintenance of circuit, maintenance are all inconvenient.

Summary of the invention

The purpose of this utility model is to propose a kind of device of playing TV signal with LED display, to overcome the shortcoming of prior art, enlarge the information coverage of display screen polylith networking, and a center control is carried out in the networking of display screen, display screen in the networking broadcasts automatically, and guard, control that need not personnel be broadcasted cost to reduce, be that system is more simplified, with the reliability of raising information broadcast.

The device with LED display broadcast TV signal that the utility model proposes is made of television receiver, A/D converter, LED display.Television receiver receives anolog TV signals, comprise satellite TV signal, cable TV signal, terrestrial television signal, and anolog TV signals is converted into analog rgb signal and synchronizing signal the most at last; A/D converter receives the analog rgb signal and the synchronizing signal of television receiver output, and is converted to digital rgb three primary colors gradation data and control signal, broadcasts for LED display; A/D converter has phase-locked loop circuit, and this circuit is converted to the required control signal of LED display with the synchronizing signal of television receiver output.

The device that the utility model proposes with LED display broadcast TV signal, the straightforward anolog TV signals that receive, pass through television receiver, broadcast by LED display behind the A/D converter, utilize device of the present utility model, can use lower cost, constituting with the TV station is the LED display networking Play System that broadcasts control centre.Display screen is placed the bustling street corner in city, can develop community's public information resource, the LED display of tens networkings is set in the bustling highway section in city, offer a public information channel specially by TV station, specially broadcast the popular social hotspots of being paid close attention to, topical news, financial statement, amusement dynamically, national policy, national economy statistics, survey report, competitive sports, traffic, Weather information etc., help the popular transmission of public information.

Description of drawings:

Fig. 1 is a system schematic of playing Computer signal in the prior art with LED display

Fig. 2 is the structural representation of the utility model device

Embodiment

The utility model proposes with LED display play TV signal device structural representation as shown in Figure 2, the television receiver that television receiver adopts Beijing development in science and technology Co., Ltd of XianCheng to produce, 8 ADCAL875 of high speed triple channel that A/D converter adopts U.S. Averlogic Technologies company to produce with phase-locked loop circuit (PLL) and integrated circuit (IC) bus (I2C) control, the full color display that LED display adopts the Beijing Liad Electronics Science and Technology Co., Ltd to produce.Adopt DB15 D type socket to be connected between television receiver and the A/D converter, adopt the feature socket of display screen to be connected between A/D converter and the LED display, whole device is connected with the mains, tuning by television receiver, TV programme can be play on LED display.Anolog TV signals become analog rgb signal and synchronizing signal by television receiver, convert digital rgb three primary colors gradation data and control signal to by A/D converter again, are broadcasted by LED display at last.The utility model device can be play automatically, need not personnel guard, thereby can use lower cost, and constituting with the TV station is the LED display networking Play System that broadcasts control centre, is used for the popular transmission of public information.

Claims

1, a kind of device with LED display broadcast TV signal is characterized in that it is made of television receiver, A/D converter, LED display.

2, device as claimed in claim 1, it is characterized in that described television receiver receives anolog TV signals, comprises satellite TV signal, cable TV signal, terrestrial television signal, and anolog TV signals are converted into analog rgb signal and synchronizing signal the most at last.

3, device as claimed in claim 1 is characterized in that described A/D converter has phase-locked loop circuit.

4, device as claimed in claim 1 is characterized in that described A/D converter receives the analog rgb signal and the synchronizing signal of television receiver output, and is converted to LED display required digital rgb three primary colors gradation data and control signal.