CN2702560Y - YPbPr signal and RGB signal switching circuit of PDP television - Google Patents
YPbPr signal and RGB signal switching circuit of PDP television Download PDFInfo
- Publication number
- CN2702560Y CN2702560Y CN 200420051912 CN200420051912U CN2702560Y CN 2702560 Y CN2702560 Y CN 2702560Y CN 200420051912 CN200420051912 CN 200420051912 CN 200420051912 U CN200420051912 U CN 200420051912U CN 2702560 Y CN2702560 Y CN 2702560Y
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- ypbpr
- pi5v330q
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Abstract
The utility model relates to a YPbPr signal and RGB signal switching circuit of a PDP television. The utility model adopts the high bandwidth chip of PI5V 330Q. High definition signals YPbPr input terminals through the YPbPr, after respectively connected with bead FB703, bead FB704, and bead FB705, each end connected with a 75 ohmic resistor over the ground, then after respectively through a voltage-isolating capacitor coupling and through an emitter follower formed by a transistor, input the signal Y2, Pb 2, and Pr 2 into the 2, 5, and 11 pin of the chip PI5V 330Q. The RGB signal A-GREEN, A-BLUE, and A-RED input from VGA end respectively input into the 3, 6, and 10 pin of the chip PI5V 330Q. After YPbPr and RGB signal are switched by the chip PI5V 330Q, they respectively output Y_GREEN, Pb_BLUE, and Pr_RED signal from 4, 7, and 9 pin of the chip PI5V 330Q. The utility model has the advantages of simple circuit, high reliability, and stable working, and can be widely used to the PDP television.
Description
Technical field
The utility model belongs to the TV set circuit technical field, more particularly relates to the YPbPr signal of PDP TV and the improvement of rgb signal commutation circuit.
Background technology
Existing PDP TV (plasm TV) has more and more added universal.The PDP TV is generally all supported the RGB input of high definition YPbPr and computer.In the PDP TV, before to signal processing, all to once switch, then the signal after switching be handled doing between YpbPr signal and the rgb signal.The switching of both signals generally all adopts the PI5V330Q integrated circuit of high bandwidth to carry out.In the PDP TV, as the switching in general television set, both signal is directly inputted to PI5V330Q, will face the flimsy integrity problem of PI5V330Q.X driving Y driving all is the circuit that produces high impulse in the PDP TV, repeatedly plugs the reliability that the YPbPr terminal can reduce PI5V330Q equally, causes the damage of PI5V330Q circuit.
Summary of the invention
The purpose of this utility model, just be to overcome above-mentioned shortcoming and defect, improve the circuit that adopts PI5V330Q to switch YpbPr signal and rgb signal, reduce the influence of the YPbPr signal of outer bound pair input, improve the reliability of the work of PI5V330Q, and then promote the reliability of whole PDP television system.
In order to achieve the above object, the utility model adopts the PI5V330Q chip of high bandwidth.High definition YpbPr signal is through the YPbPr input terminal, respectively with magnetic bead FB703, FB704, after FB705 connects, one of termination, 75 ohm resistance over the ground separately, then respectively through a capacitance coupling, again respectively behind the emitter follower that triode is formed, with Y2, Pb2, the Pr2 signal is imported 2 of PI5V330Q respectively, 5,11 pin, rgb signal A-GREEN from the input of VGA terminal, A-BLUE, A-RED imports 3 of PI5V330Q respectively, 6,10 pin, above-mentioned YPbPr and rgb signal after PI5V330Q switches, respectively from its 4,7,9 pin output Y_GREEN, Pb_BLUE, the Pr_RED signal.
The utility model is not directly inputted to PI5V330Q to the YpbPr signal of input as prior art; but to from the signal of YPbPr terminal input through a magnetic bead with over the ground behind termination 75 Ohmic resistances; by the one-level emitter follower, make it between PI5V330Q and YPbPr terminal, play the insulation blocking effect.Can improve the reliability of whole commutation circuit so greatly.
Task of the present utility model comes to this and finishes.
The commutation circuit simplicity of design of the utility model YPbPr signal and rgb signal has just increased local circuit simply, has greatly promoted the reliability that commutation circuit is worked under PDP TV complex environment, and it is very stable to work.It can be widely used in the PDP television set.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Embodiment 1.A kind of YPbPr signal of PDP TV and rgb signal commutation circuit, as shown in Figure 1.It still adopts the PI5V330Q chip (1) of high bandwidth.High definition YpbPr signal is through YPbPr input terminal (2), respectively with after magnetic bead FB703 (3), FB704 (4), FB705 (5) are connected, one of termination, 75 ohm resistance (6) over the ground separately, be coupled through a capacitance (7) respectively then, respectively behind the emitter follower (8) that triode is formed, Y2, Pb2, Pr2 signal are imported 2,5,11 pin of PI5V330Q (1) respectively again. Import 3,6,10 pin of PI5V330Q (1) respectively from rgb signal A-GREEN, A-BLUE, the A-RED of VGA terminal (9) input.Above-mentioned YPbPr and rgb signal are after PI5V330Q (1) switches, respectively from 4, the output of 7,9 pin Y_GREEN, Pb_BLUE, Pr_RED signal.For example, Y1 every straight coupling, imports the PIN2 (being the Y2 signal) of PI5V330Q (1) through electric capacity (7) again behind the emitter follower that triode (8) is formed.
Claims (1)
1. the YPbPr signal of a PDP TV and rgb signal commutation circuit, it adopts the PI5V330Q chip of high bandwidth, it is characterized in that high definition YpbPr signal is through the YPbPr input terminal, respectively with magnetic bead FB703, FB704, after FB705 connects, one of termination, 75 ohm resistance over the ground separately, then respectively through a capacitance coupling, again respectively behind the emitter follower that triode is formed, with Y2, Pb2, the Pr2 signal is imported 2 of PI5V330Q respectively, 5,11 pin, rgb signal A-GREEN from the input of VGA terminal, A-BLUE, A-RED imports 3 of PI5V330Q respectively, 6,10 pin, above-mentioned YPbPr and rgb signal after PI5V330Q switches, respectively from its 4,7,9 pin output Y_GREEN, Pb_BLUE, Pr_RED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420051912 CN2702560Y (en) | 2004-06-26 | 2004-06-26 | YPbPr signal and RGB signal switching circuit of PDP television |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420051912 CN2702560Y (en) | 2004-06-26 | 2004-06-26 | YPbPr signal and RGB signal switching circuit of PDP television |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2702560Y true CN2702560Y (en) | 2005-05-25 |
Family
ID=34777213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420051912 Expired - Fee Related CN2702560Y (en) | 2004-06-26 | 2004-06-26 | YPbPr signal and RGB signal switching circuit of PDP television |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2702560Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469299A (en) * | 2010-11-19 | 2012-05-23 | Tcl新技术（惠州）有限公司 | Signal annular communication system and method of monitoring unit |
-
2004
- 2004-06-26 CN CN 200420051912 patent/CN2702560Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102469299A (en) * | 2010-11-19 | 2012-05-23 | Tcl新技术（惠州）有限公司 | Signal annular communication system and method of monitoring unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |