CN107801079A

CN107801079A - Television set

Info

Publication number: CN107801079A
Application number: CN201711136930.XA
Authority: CN
Inventors: 王林
Original assignee: Qingdao Hisense Electronics Co Ltd
Current assignee: Qingdao Hisense Electronics Co Ltd
Priority date: 2017-11-16
Filing date: 2017-11-16
Publication date: 2018-03-13
Anticipated expiration: 2037-11-16
Also published as: CN107801079B

Abstract

A kind of television set, including：Mainboard, it is made up of first circuit board and the main circuit being arranged on the first circuit board and the first connector being connected with the main circuit；And tuner card, it is made up of second circuit board and the tuner being arranged on the second circuit board and the second connector being connected with the tuner；Wherein, the tuner card docking by second connector and first connector, with the mainboard it is pluggable be connected.The present invention can adapt to the needs of practical application, optionally configuring high-frequency head, so as to effectively reduce cost.

Description

Television set

Technical field

The present invention relates to television set, the more particularly to attachment structure of the tuner of television set and main circuit.

Background technology

Referring to Fig. 1 and Fig. 2, existing television set 10a generally includes the He of main circuit 1 being arranged on same circuit board 9 Tuner 2.Wherein, main circuit 1 is mainly made up of chip N1-5 and its peripheral circuit.Tuner 2 is mainly by chip U1 and its outer Enclose circuit composition.It is directly connected between tuner 2 and main circuit 1 by the circuit on circuit board 9, these circuits specifically include： Circuit IF_AGC, the B14 pin of connection chip U1 3 pin and chip N1-5；Circuit SCL, connection chip U1 4 pin and chip N1-5 E18 pin；Circuit SDA, the F18 pin of connection chip U1 5 pin and chip N1-5；Circuit DIF1, connection chip U1 4 pin and core Piece N1-5 F38 pin；And circuit DIF2, the F37 pin of connection chip U1 4 pin and chip N1-5.This tuner 2 and master The attachment structure of circuit 1, has a problem that：With the popularization of networking, many users do not use traditional cable television, Network box is begun to use to pass through HDMI (High Definition Multimedia Interface, high-definition multimedia Interface) TV reception, tuner 2 loses original effect, and in other words, tuner 2 constitutes into unnecessary part Unnecessary cost overhead.

The content of the invention

The technical problem to be solved in the present invention is to overcome above-mentioned the shortcomings of the prior art, and proposes a kind of TV Machine, the needs of practical application are can adapt to, optionally configuring high-frequency head, so as to effectively reduce cost.

The technical scheme that the present invention proposes for above-mentioned technical problem includes, and proposes a kind of television set, including：Mainboard, It is made up of first circuit board and the main circuit being arranged on the first circuit board and the first connector being connected with the main circuit； And tuner card, its be connected by second circuit board and the tuner being arranged on the second circuit board and with the tuner Two connectors are formed；Wherein, the tuner card docking by second connector and first connector, can insert with the mainboard Rise sheer from level ground and be connected.

Compared with prior art, the present invention is by dexterously using first circuit board combination main circuit and the first connector structure Into mainboard, tuner card is formed using second circuit board combination tuner and the second connector, can be answered according to the reality of user Use situation：Need to use tuner to receive the TV signal of analog signal, or numeral letter is directly received by network box Number TV signal without using tuner, optionally configuring high-frequency head, so as to effectively reduce cost.

Brief description of the drawings

Fig. 1 is the theory diagram of existing television set.

Fig. 2 is the electrical schematic diagram of existing television set.

Fig. 3 is the theory diagram of the television set of the present invention.

Fig. 4 is the electrical schematic diagram of main circuit in television set of the invention.

Fig. 5 is the electrical schematic diagram of the first connector in television set of the invention.

Fig. 6 is the television set making high frequency head of the present invention and the electrical schematic diagram of the second connector.

Fig. 7 is the correspondence figure of main circuit and tuner in television set of the invention.

Wherein, Main Reference Numerals are described as follows：10a, the connector 4 second of 10 television set, 1 main circuit, 2 tuner 3 first The circuit board of 8 second circuit board of connector 5 mainboard, 6 tuner card, 7 first circuit board 9.

Embodiment

Below in conjunction with accompanying drawing, give the present invention further elaboration.

Referring to Fig. 3, Fig. 3 is the theory diagram of the television set of the present invention.The present invention proposes a kind of television set 10, such as：Liquid Brilliant TV, laser television.The television set 10 includes：First circuit board 7 and the main circuit 1 being laid on first circuit board 7 and with The first connected connector 3 of main circuit 1；And second circuit board 8 and the tuner 2 that is laid on second circuit board 8 and with height First 2 the second connected connector 4 of frequency.Wherein, the second connector 4 is adapted with the first connector 3, when the two is docked to together When, tuner 2 combines with main circuit 1；When the two is separated, tuner 2 is separated with main circuit 1.It is appreciated that , first circuit board 7 and the connector 3 of main circuit 1 and first thereon form a mainboard 5, second circuit board 8 and height thereon Frequency first 2 and second connector 4 form a tuner card 6, be between tuner card 6 and mainboard 5 pluggable connection relation, high frequency Head card 6 can depend on the needs of practical application and configure, also, tuner card 6 can be designed to a variety of specifications, with flexible Suitable for different application scenarios.

Referring to Fig. 4, Fig. 4 is the electrical schematic diagram of main circuit in television set of the invention.Main circuit 1 mainly by chip N1-5 and Its peripheral circuit is formed.

Referring to Fig. 5, Fig. 5 is the electrical schematic diagram of the first connector in television set of the invention.First connector 3 is mainly by even Meet device XS16 and its peripheral circuit is formed.

Referring to Fig. 6, Fig. 6 is the television set making high frequency head of the present invention and the electrical schematic diagram of the second connector.Tuner 2 is main It is made up of chip U1 and its peripheral circuit.Second connector 4 is mainly made up of connector XS17 and its peripheral circuit.

Referring to Fig. 5, resistance R1004, resistance R1005, resistance R1006, resistance R1007, the electricity of metal-oxide-semiconductor V60 and its periphery Resistance R1008, resistance R1009, electric capacity C848 and electric capacity C849 constitute tuner card detection circuit, for detecting tuner card Whether 6 be plugged on mainboard 5.Tuner card detection circuit can be converted to Tuner-GND signals Tuner-DET signals, carry Chip N1-5 (incorporated by reference to referring to Fig. 4) a port is supplied, such as：COM0 pins.

If no slotting tuner card 6 on mainboard 5, the Tuner-GND signals in Fig. 5 are hanging.Metal-oxide-semiconductor V60 is not turned on, Tuner-DET signals maintain high level.In start process, chip N1-5 COM0 pins receive high level, give tacit consent to high frequency First 2 is unresponsive, can not search tuner 2.OSD (on-screen display, screen display) menu of television set 10 simultaneously The related information of partial tuner is no longer shown.

If mainboard 5 is inserted with tuner card 6, plug the connector XS16 of mainboard 57 pin (i.e. Tuner-GND signals) with The connector XS17 of tuner card 67 pin ground connection, metal-oxide-semiconductor V60 D/S conductings, Tuner_DET signals are low level.Starting shooting During, chip N1-5 COM0 pins receive low level, are considered as to obtain the response of tuner 2, confirm that tuner 2 has connected Connect, it is possible to establish normal communication with tuner 2, OSD menu can show ATV (simulated television)/DTV (DTV) phase Close part.

It is noted that in the present embodiment, connector XS16 and XS17 are to select VGA standard connector, at other In embodiment, connector XS16 and XS17 can also select the connector of other specifications.

In addition, impedance is relatively low at high frequencies by electric capacity C849, EMI (Electromagnetic can be reduced Interference, electromagnetic interference) and return flow path.Meanwhile metal-oxide-semiconductor V60 can also electrostatic isolation well influence. That is, tuner card detection circuit has the function of electrostatic protection concurrently.

Referring to Fig. 7, Fig. 7 is the correspondence figure of main circuit and tuner in television set of the invention.Main circuit 1 and high frequency First 2 communication process generally comprises：In start process, first, main circuit 1 initiates communication start signals and (passes through serial bus SCL lines), the response of tuner 2 (low level is effective)；Then, main circuit 1 resends Start signals again, and sends date (data, by the SDA line of serial bus), communication are normal.If in start process, tuner 2 is unresponsive (high level), main Circuit 1 sends stop signals (by the SCL lines of serial bus), and main circuit 1 and the connection of tuner 2 stop；After start, tuner 2 functions of modules can not realize that custom menu does not show ATV/DTV related contents simultaneously.

The television set 10 of the present invention is by dexterously using first circuit board 7 to be formed with reference to the connector 3 of main circuit 1 and first Mainboard 5, the connector 3 of tuner 2 and second is combined using second circuit board 8 and forms tuner card 6, can adapt to practical application Need, optionally configuring high-frequency first 2, so as to effectively reduce cost.

The above, only presently preferred embodiments of the present invention, are not intended to limit embodiment of the present invention, and this area is general Lead to central scope and spirit of the technical staff according to the present invention, can very easily carry out corresponding flexible or modification, therefore originally The protection domain of invention should be defined by the protection domain required by claims.

Claims

A kind of 1. television set, it is characterised in that including：Mainboard, it is by first circuit board and is arranged on the first circuit board Main circuit and the first connector being connected with the main circuit are formed；And tuner card, it is by second circuit board and is arranged in this Tuner on second circuit board and the second connector being connected with the tuner are formed；Wherein, the tuner card by this Two connectors dock with first connector, with the mainboard it is pluggable be connected.
2. according to the television set described in claim 1, it is characterised in that the mainboard is provided with tuner card detection circuit, is used for Detect whether the tuner card is plugged on the mainboard.
3. according to the television set described in claim 2, it is characterised in that tuner card detection circuit includes metal-oxide-semiconductor, the MOS Pipe provides effective detection level signal when the tuner card is plugged on the mainboard, to the master chip on the mainboard.
4. according to the television set described in claim 3, it is characterised in that it is low level that this, which effectively detects level signal,.
5. according to the television set described in claim 3, it is characterised in that the port of the output of the metal-oxide-semiconductor detection level signal Provided with the filter capacitor for being connected to ground.
6. according to the television set described in claim 1, it is characterised in that first connector and the second connector selection standard VGA connector.
7. according to the television set described in any one of claim 1 to 6, it is characterised in that adopted between the main circuit and the tuner Communicated with serial bus.