CN208581276U - Mobile Broadcast Control terminal - Google Patents

Abstract

The utility model discloses a kind of mobile Broadcast Control terminals, including master control board card, touch screen, power module and outer LVDS interface, master control board card includes MCU and the video chip connecting with MCU, audio chip, memory chip, GPIO keyboard interface, network interface, power input hole, interior LVDS interface and the infrared head of remote controler, touch screen is connect with GPIO keyboard interface, power module is connect with the power input hole, and outer LVDS interface is connect with interior LVDS interface；Power module includes voltage input end, voltage output end, the first potentiometer, second resistance, the first triode, the second triode, third transistor, the first zener diode, first capacitor, the second capacitor, 3rd resistor and the 4th resistance.The utility model circuit structure is relatively simple, cost is relatively low, maintain easily, the safety and reliability of circuit is higher.

Description

Mobile Broadcast Control terminal

Technical field

The utility model relates to Broadcast Control field of terminal, in particular to a kind of mobile Broadcast Control terminal.

Background technique

Broadcast Control terminal is the large screen Multimedia Combination studio equipment of profession, its exclusive Distributed Area administrative skill is true Just realizing the communication mode that different terminals in same system distinguish audient.By the Broadcast Control terminal, user can easily structure Distribution of multimedia information and audio/video player system in networking, provide the video multimedia services of high quality, and video and audio quality is reachable To brilliant high definition television quality.

Video, audio signal, pictorial information and roll titles are passed through network with the coding mode of high quality by Broadcast Control terminal Be transferred to wide-angle player, then by wide-angle player by combinational multimedia information be converted into display terminal (such as liquid crystal, from Son, television set) vision signal broadcast.This information release model has merged the diversity of multimedia video information and lively Property, moreover it is possible to the remote centralized management of information publication and the update at any time of content are realized, so that news, picture, weather forecast etc. are each Intercutting at any time for instant messages of kind is possibly realized, and most fresh information can be passed to audient in first time.

The component that the in-line power circuit of traditional Broadcast Control terminal uses is more, and wiring is complicated, is not easy to safeguard, and hardware Higher cost.In addition, the in-line power circuit of traditional Broadcast Control terminal lacks corresponding circuit protection function, and such as: anti-signal is dry Function is disturbed, causes the safety and reliability of circuit poor.

Utility model content

The technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide a kind of circuit knot Structure is relatively simple, cost is relatively low, maintains easily, the higher mobile Broadcast Control terminal of the safety and reliability of circuit.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of mobile Broadcast Control terminal is constructed, including Master control board card, touch screen, power module and outer LVDS interface, the master control board card includes MCU, video chip, audio chip, interior Deposit chip, GPIO keyboard interface, network interface, power input hole, interior LVDS interface and the infrared head of remote controler, the video core Piece, audio chip, memory chip, GPIO keyboard interface, network interface, power input hole, interior LVDS interface and remote controler are infrared Head is connect with the MCU, and the touch screen is connect with the GPIO keyboard interface, the power module and the power input Hole connection, the outer LVDS interface are connect with the interior LVDS interface；

The power module include voltage input end, voltage output end, the first potentiometer, second resistance, the first triode, Second triode, third transistor, the first zener diode, first capacitor, the second capacitor, 3rd resistor and the 4th resistance, institute The base stage for stating third transistor is connect with one end of the sliding end of first potentiometer and second resistance respectively, second electricity The other end of resistance is connect with the voltage input end, a fixing end of first potentiometer respectively with first pressure stabilizing two The anode of pole pipe is connected with one end of first capacitor, the cathode of first zener diode respectively with the third transistor The connection of one end of emitter and the second capacitor, the other end of second capacitor are solid with another of first potentiometer respectively The emitter connection of fixed end, one end of 3rd resistor, the other end of first capacitor, voltage output end and the second triode, it is described The collector of third transistor is connect with the base stage of first triode, the emitter of first triode respectively with it is described The connection of the base stage of the other end of 3rd resistor and the second triode, the collector of second triode and the 4th resistance One end connection, the collector of first triode and the other end of the 4th resistance are connect with the voltage input end, described The capacitance of second capacitor is 280pF.

In mobile Broadcast Control terminal described in the utility model, the power module further includes the 5th resistance, and the described 5th One end of resistance is connect with the collector of first triode, and the other end and the voltage input end of the 5th resistance connect It connects, the resistance value of the 5th resistance is 53k Ω.

In mobile Broadcast Control terminal described in the utility model, the power module further includes third capacitor, the third One end of capacitor is connect with the collector of the third transistor, the other end of the third capacitor and first triode Base stage connection, the capacitance of the third capacitor are 370pF.

In mobile Broadcast Control terminal described in the utility model, the power module further includes the second diode, and described The anode of two diodes is connect with a fixing end of first potentiometer, the cathode of second diode and described first The anode of zener diode connects, the model L-1822 of second diode.

In mobile Broadcast Control terminal described in the utility model, first triode, the second triode and the three or three pole Pipe is PNP type triode.

The mobile Broadcast Control terminal for implementing the utility model has the advantages that due to being equipped with master control board card, touch-control Screen, power module and outer LVDS interface, master control board card include that MCU, video chip, audio chip, memory chip, GPIO keyboard connect Mouth, network interface, power input hole, interior LVDS interface and the infrared head of remote controler, power module include that voltage input end, voltage are defeated Outlet, the first potentiometer, second resistance, the first triode, the second triode, third transistor, the first zener diode, first Capacitor, the second capacitor, 3rd resistor and the 4th resistance, in-line power circuit of the power module relative to traditional Broadcast Control terminal, The component that it is used is less, due to saving some components, can reduce hardware cost in this way, in addition, the second capacitor is used In preventing the interference between the second triode and third transistor, therefore circuit structure is relatively simple, cost is relatively low, facilitates dimension Shield, the safety and reliability of circuit are higher.

Detailed description of the invention

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor Under, it is also possible to obtain other drawings based on these drawings.

Fig. 1 is the structural schematic diagram in the mobile Broadcast Control terminal one embodiment of the utility model；

Fig. 2 is the circuit diagram of power module in the embodiment.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

In the mobile Broadcast Control terminal embodiment of the utility model, the structural schematic diagram for moving Broadcast Control terminal is as shown in Figure 1. In Fig. 1, which includes master control board card 1, touch screen 2, power module 3 and outer LVDS interface 4, wherein master control borad Card 1 includes MCU11, video chip 12, audio chip 13, memory chip 14, GPIO keyboard interface 15, network interface 16, power supply Input hole 17, interior LVDS interface 18 and the infrared head 19 of remote controler, video chip 12, audio chip 13, memory chip 14, GPIO key Disk interface 15, network interface 16, power input hole 17, interior LVDS interface 18 and the infrared head 19 of remote controler are connect with MCU11, touching Control screen 2 is connect with GPIO keyboard interface 15, and power module 3 is connect with power input hole 17, outer LVDS interface 4 and interior LVDS interface 18 connections.

Specifically, the infrared head 19 of remote controler is used cooperatively with remote controler.Interior LVDS interface 18 is integrated with data line and electricity Source line.Video chip 12 uses chip smp8653, and audio chip 13 uses the AK4420ET digital-to-analogue conversion of AKM semiconductor company Device converts digital audio and video signals, realizes the left and right sound channels output that simulates stereo.

Fig. 2 is the circuit diagram of power module in the present embodiment, and in Fig. 2, which includes voltage input end Vin, voltage output end Vo, the first potentiometer RP1, second resistance R2, the first triode Q1, the second triode Q2, the three or three pole Pipe Q3, the first zener diode D1, first capacitor C1, the second capacitor C2,3rd resistor R3 and the 4th resistance R4, wherein third The base stage of triode Q3 is connect with one end of the sliding end of the first potentiometer RP1 and second resistance R2 respectively, second resistance R2's The other end is connect with voltage input end Vin, a fixing end of the first potentiometer RP1 sun with the first zener diode D1 respectively Pole is connected with one end of first capacitor C1, the cathode of the first zener diode D1 respectively with the emitter of third transistor Q3 and One end of two capacitor C2 connects, and the other end of the second capacitor C2 is electric with another fixing end of the first potentiometer RP1, third respectively Hinder the emitter connection of one end of R3, the other end of first capacitor C1, voltage output end Vo and the second triode Q2, the three or three pole The collector of pipe Q3 is connect with the base stage of the first triode Q1, and the emitter of the first triode Q1 is another with 3rd resistor R3 respectively One end is connected with the base stage of the second triode Q2, and the collector of the second triode Q2 is connect with one end of the 4th resistance R4, and first The other end of the collector of triode Q1 and the 4th resistance R4 are connect with voltage input end Vin.

In-line power circuit of the power module 3 relative to traditional Broadcast Control terminal, the component used is less, due to section Some components are saved, circuit structure is relatively simple, maintains easily, and can reduce hardware cost in this way.In addition, the second capacitor C2 For coupled capacitor, for preventing the interference between the second triode Q2 and third transistor Q3, therefore the safety of circuit and can It is higher by property.It is noted that the capacitance of the second capacitor C2 is 280pF in the present embodiment, certainly, in practical applications, The capacitance of second capacitor C2 can adjust accordingly as the case may be.

The power circuit 3 use the emitter of the first triode Q1 as reference level, output voltage by partial pressure sampling after It is compared with it, when output voltage is increased because of certain reason, the base voltage of the second triode Q2 is also increased, the second capacitor The voltage of C2 increases therewith, and the base potential decline of third transistor Q3 makes output voltage tend towards stability.

In the present embodiment, the first triode Q1, the second triode Q2 and third transistor Q3 are PNP type triode.When So, in practical applications, the first triode Q1, the second triode Q2 and third transistor Q3 can also be all made of three pole of NPN type Pipe, but at this moment the structure of circuit also will accordingly change.

In the present embodiment, which further includes the 5th resistance R5, one end of the 5th resistance R5 and the first triode Q1 Collector connection, the other end of the 5th resistance R5 connect with voltage input end Vin.5th resistance R5 is current-limiting resistance, is used for Current-limiting protection is carried out to the collector current of the first triode Q1, to further enhance the safety and reliability of circuit.It is worth One is mentioned that, in the present embodiment, the resistance value of the 5th resistance R5 is 53k Ω, certainly, in practical applications, the resistance of the 5th resistance R5 Value can adjust accordingly as the case may be.

In the present embodiment, which further includes third capacitor C3, one end of third capacitor C3 and third transistor The connection of Q3 collector, the other end of third capacitor C3 are connect with the base stage of the first triode Q1.Third capacitor C3 is coupled capacitor, For preventing the interference between third transistor Q3 and the first triode Q1, further to enhance the safety of circuit and reliable Property.It is noted that the capacitance of third capacitor C3 is 370pF in the present embodiment, certainly, in practical applications, third electricity The capacitance for holding C3 can adjust accordingly as the case may be.

In the present embodiment, which further includes the anode and the first current potential of the second diode D2, the second diode D2 A fixing end of device RP1 connects, and the cathode of the second diode D2 is connect with the anode of the first zener diode D1.Two or two pole Pipe D2 is Current Limiting Diodes, for carrying out current-limiting protection, to further enhance current limitation effect.It is noted that the present embodiment In, the model L-1822 of the second diode D2, certainly, in practical applications, the second diode D2 can also use its alloytype Number with similar functions diode.

In short, in the present embodiment, in-line power circuit of the power module 3 relative to traditional Broadcast Control terminal is used Component is less, and circuit structure is relatively simple, maintains easily, due to saving some components, can reduce in this way hardware at This.In addition, being equipped with coupled capacitor in the power module 3, therefore the safety and reliability of circuit is higher.

The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model Protection scope within.

Claims (5)

1. a kind of mobile Broadcast Control terminal, which is characterized in that including master control board card, touch screen, power module and outer LVDS interface, institute Stating master control board card includes MCU, video chip, audio chip, memory chip, GPIO keyboard interface, network interface, power input Hole, interior LVDS interface and the infrared head of remote controler, the video chip, audio chip, memory chip, GPIO keyboard interface, network Interface, power input hole, interior LVDS interface and the infrared head of remote controler are connect with the MCU, the touch screen and the GPIO Keyboard interface connection, the power module are connect with the power input hole, the outer LVDS interface and the interior LVDS interface Connection；

The power module includes voltage input end, voltage output end, the first potentiometer, second resistance, the first triode, second Triode, third transistor, the first zener diode, first capacitor, the second capacitor, 3rd resistor and the 4th resistance, described The base stage of three triodes is connect with one end of the sliding end of first potentiometer and second resistance respectively, the second resistance The other end is connect with the voltage input end, a fixing end of first potentiometer respectively with first zener diode Anode connected with one end of first capacitor, the transmitting with the third transistor respectively of the cathode of first zener diode Pole is connected with one end of the second capacitor, and the other end of second capacitor is fixed with another of first potentiometer respectively The emitter connection at end, one end of 3rd resistor, the other end of first capacitor, voltage output end and the second triode, described the The collector of three triodes is connect with the base stage of first triode, and the emitter of first triode is respectively with described The connection of the base stage of the other end of three resistance and the second triode, the one of the collector of second triode and the 4th resistance End connection, the collector of first triode and the other end of the 4th resistance connect with the voltage input end, and described the The capacitance of two capacitors is 280pF.

2. mobile Broadcast Control terminal according to claim 1, which is characterized in that the power module further includes the 5th resistance, One end of 5th resistance is connect with the collector of first triode, the other end and the voltage of the 5th resistance Input terminal connection, the resistance value of the 5th resistance are 53k Ω.

3. mobile Broadcast Control terminal according to claim 2, which is characterized in that the power module further includes third capacitor, One end of the third capacitor is connect with the collector of the third transistor, the other end of the third capacitor and described first The base stage of triode connects, and the capacitance of the third capacitor is 370pF.

4. mobile Broadcast Control terminal according to claim 3, which is characterized in that the power module further includes the two or two pole Pipe, the anode of second diode are connect with a fixing end of first potentiometer, the cathode of second diode It is connect with the anode of first zener diode, the model L-1822 of second diode.

5. mobile Broadcast Control terminal according to any one of claims 1 to 4, which is characterized in that first triode, Two triodes and third transistor are PNP type triode.