CN2579111Y

CN2579111Y - Forced-synchronous image-channel superimposed display circuit of TV-set

Info

Publication number: CN2579111Y
Application number: CN02255360U
Authority: CN
Inventors: 李磊; 黄海华; 陈阳
Original assignee: Qingdao Hisense Electronics Co Ltd
Current assignee: Qingdao Hisense Electronics Co Ltd
Priority date: 2002-11-19
Filing date: 2002-11-19
Publication date: 2003-10-08
Anticipated expiration: 2012-11-19

Abstract

The utility model relates to a forced synchronous image channel superimposed display circuit of a TV, which belongs to the technical field of a TV. The utility model at least comprises a gating chip superposed on the rear end of an image channel of a TV. RGB signals output by a function module are respectively connected with an R2 pin, a G2 pin and a B2 pin of the gating chip, and FB signals output by the function module are connected with a gating control FB2 pin, a gating control FBG pin and a gating control FBR pin of the gating chip. RGB signals output by a TV are respectively connected with an R1 pin, a G1 pin and a B1 pin of the gating chip, an output end Rout pin, an output end Gout pin and an output end Bout pin of the gating chip after the gating chip is gated are respectively connected with an RGB processing amplifying chip of the TV, and the gating chip can be a TEA5114A type chip. The utility model can make the display output of the function module and the signals of a TV displayed on a TV screen at the same time. Besides, the function module is inserted into a TV, and the information function and the TV function are tightly integrated together. The utility model has the advantages of simplicity, reliability and low cost.

Description

The image channel forced synchronism stack display circuit of television set

Technical field

The utility model belongs to technical field of television sets, more particularly relates to superpose the synchronously improvement of display circuit of image channel.

Background technology

In the information-based application process of television set, increase some functional modules always.For making the consumer when watching TV programme, enjoy other service that functional module is brought, functional module is embedded in the movement that makes it in the television set with television set to combine, and make other content of television set Presentation Function module when showing television image, be exactly very necessary.

The purpose of this utility model, just be to provide a kind of simply, reliably, circuit cheaply, the demonstration output of functional module and TV signal are simultaneously displayed on the video screen, bring personalized Presentation Function, and functional module is built in the TV, information-based function and TV functions are more closely merged.

Summary of the invention

In order to achieve the above object, the utility model comprises that at least a slice gating chip is superimposed upon the rear end of television image passage, the rgb signal of functional module output is connected with R2, G2, the B2 pin of gating chip respectively, the FB signal of functional module output is connected with gating control FB2, FBG, the FBR pin of gating chip, the rgb signal of television set output is connected with R1, G1, the B1 pin of gating chip respectively, and output Rout, the Gout behind the gating CE, Bout pin are handled the amplification chip with the RGB of television set respectively and be connected.

The demonstration output signal of functional module just is added to the rear end of television image passage simply.Functional module is used from the horizontal/vertical synchronization signals (Hsyn/Vsyn) of television scanning part and is made time reference, with phase-locked loop (PLL) forced synchronism of inside modules when the scanning of television set on the base, control programmable register so that the frame rgb signal of output has identical time base with the rgb signal of television set by the demonstration in the setting module, and provide a FB signal corresponding to the module rgb signal based on base this moment.The rgb signal of module and the rgb signal of television set are input in the gating chip of two-way gating simultaneously, with the FB signal of module output as gating signal.When mould has signal output soon, gating module rgb signal.Otherwise, gating TV rgb signal.Signal behind the gating is sent into the RGB process chip in the TV movement, sends into the video amplifier section again, delivers to picture tube at last, realizes that the stack of module by signal and TV signal shows.The power supply of module is provided by the Core of TV set power supply, and remote signal receives the infrared receiving circuit of shared TV movement, can also obtain reseting controling signal from TV movement CPU.

The gating chip can be the TEA5114A type.The function admirable cost is low.

The rgb signal of functional module output can be connected with R2, G2, the B2 pin of gating chip respectively by pin type socket 2.The FB signal of functional module output can be connected with gating control FB2, FBG, the FBR pin of gating chip by pin type socket 2.The rgb signal of television set output can be connected with R1, G1, the B1 pin of gating chip respectively by pin type socket 1.Output Rout, Gout behind the gating CE, Bout pin can be handled the amplification chip with the RGB of television set respectively by pin type socket 3 and be connected.Connection by 3 pin type sockets is more simple, reliable.

Advantage of the present utility model and good effect are: the demonstration output of functional module can be shown simultaneously with TV signal, make information-based function and TV functions more closely merge.Circuit is simple, and functional module and TV movement are also relatively independent.

Description of drawings

Fig. 1 is a block diagram of the present utility model.

Fig. 2 is its circuit theory diagrams.

Fig. 1～shown in Figure 2, the utility model comprise a slice gating chip 4, and its model is TEA5114A.The rgb signal of functional module 5 outputs is connected with R2, G2, the B2 pin of gating chip 4 respectively by pin type socket 2.The FB signal of functional module 5 outputs is connected with gating control FB2, FBG, the FBR pin of gating chip 4 by pin type socket 2.The rgb signal 6 of television set output is connected with R1, G1, the B1 pin of gating chip 4 respectively by pin type socket 1.Output Rout, Gout behind gating chip 4 gatings, Bout pin are handled amplification chip 7 with the RGB of television set respectively by pin type socket 3 and are connected with 8.9 is picture tube among Fig. 1.10 is remote signal.11 is reset signal.12 are the row field synchronization.13 are the apparent rgb signal of screen.Resistor-capacitor unit among Fig. 2 does not describe in detail.

Embodiment

Embodiment 1.A kind of image channel forced synchronism stack display circuit of television set.As shown in Figure 2.Which comprises at least the rear end that a slice gating chip is superimposed upon the television image passage, its model is TEA5114A.The rgb signal of functional module output is connected with R2, G2, the B2 pin of gating chip respectively by pin type socket 2.The FB signal of functional module output is connected with gating control FB2, FBG, the FBR pin of gating chip by pin type socket 2.The rgb signal of television set output is connected with R1, G1, the B1 pin of gating chip respectively by pin type socket 1.Output Rout, Gout behind the gating CE, Bout pin are handled the amplification chip with the RGB of television set respectively by pin type socket 3 and are connected.

The rgb signal of the functional module after the forced synchronism has identical time base with the TV rgb signal.The rgb signal of functional module output is delivered to R2, G2, the B2 pin of gating chip TEA5114A by XPW102, and the FB signal is delivered to gating control FB2, FBG, the FBR pin of TEA5114A.The rgb signal of TV output is delivered to R1, G1, the B1 pin of gating chip TEA5114A by XPW101.Output behind the gating is handled the amplification chip by the RGB that XPW103 delivers to television set.When functional module had output, the FB signal was a high level, control TEA5114A gating R2, G2, B2 output.When functional module did not have output signal, the FB signal was a low level, and control TEA5114A gating R1, G1, B1 output are finished functional module and shown that output shows with the stack that mixes of TV output.

Embodiment 1 can show the demonstration output of functional module simultaneously with TV signal, makes information-based function and TV functions more closely merge.Circuit is simple, and cost is low.Can be widely used in having in the information-based television set of various functional modules.

Claims

1. the image channel forced synchronism of television set stack display circuit, it is characterized in which comprises at least the rear end that a slice gating chip is superimposed upon the television image passage, the rgb signal of functional module output is connected with R2, G2, the B2 pin of gating chip respectively, the FB signal of functional module output is connected with gating control FB2, FBG, the FBR pin of gating chip, the rgb signal of television set output is connected with R1, G1, the B1 pin of gating chip respectively, and output Rout, the Gout behind the gating CE, Bout pin are handled the amplification chip with the RGB of television set respectively and be connected.

2. according to the image channel forced synchronism stack display circuit of the described television set of claim 1, it is characterized in that said gating chip is the TEA5114A type.

3. according to the image channel forced synchronism of claim 1 or 2 described television sets stack display circuit, the rgb signal that it is characterized in that the output of said functional module by pin type socket 2 respectively with the R2 of gating chip, G2, the B2 pin connects, the FB signal of functional module output is by the gating control FB2 of pin type socket 2 with the gating chip, FBG, the FBR pin connects, the rgb signal of television set output by pin type socket 1 respectively with the R1 of gating chip, G1, the B1 pin connects, the output Rout behind the gating CE, Gout, the Bout pin is handled the amplification chip with the RGB of television set respectively by pin type socket 3 and is connected.