CN204721517U - Track traffic PIS system display - Google Patents
Track traffic PIS system display Download PDFInfo
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- CN204721517U CN204721517U CN201520397075.8U CN201520397075U CN204721517U CN 204721517 U CN204721517 U CN 204721517U CN 201520397075 U CN201520397075 U CN 201520397075U CN 204721517 U CN204721517 U CN 204721517U
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Abstract
The utility model discloses a kind of track traffic PIS system display, comprise MCU single-chip microcomputer, difference rgb signal receiving circuit, difference audio signal reception circuit, image decoding circuit, display, audio frequency processing circuit and loudspeaker; Described image decoding circuit is electrically connected with difference rgb signal receiving circuit, and described audio frequency processing circuit is electrically connected with difference audio signal reception circuit, and described image decoding circuit and audio frequency processing circuit are electrically connected with MCU single-chip microcomputer respectively; Described difference rgb signal receiving circuit receives the difference rgb signal on three groups of twisted-pair feeders, after the MCU Single-chip Controlling display color of image and bright dark change, by image information display over the display, difference audio signal reception circuit receives the audio frequency differential signal on one group of twisted-pair feeder, after MCU Single-chip Controlling sound size, audio-frequency information is played back by loudspeaker.
Description
Technical field
The utility model relates to the technical field of track traffic display, particularly relates to a kind of track traffic PIS system display.
Background technology
Passenger information system: Passenger Information System, is called for short PIS.For passenger provides the service system of all kinds of information in subway.Passenger information system relies on multimedia network technology, take computer system as core, with station and vehicle-mounted display terminal for medium to provide the system of information service to passenger.
A kind of method of encoding to color is referred to as " color space " or " colour gamut ".Talk about with the most simply, " color space " of any one color all may be defined to a fixing numeral or variable in the world.RGB (red, green, blue) is the one of numerous color space.Adopt this coding method, often kind of color all can represent-redness, green and blue intensity with three variablees.When record and color display, RGB is modal a kind of scheme.But it lacks the favorable compatibility with early stage white and black displays system.Therefore, the way that part polyelectron electrical equipment manufacturer generally adopts is, RGB is converted to YUV color empty with, to remain compatible, then gain rgb format as required, so as on computer monitor display color figure.
Existing track traffic display generally adopts the technology of VGA audio frequency and video to carry out long range propagation, like this inside just there will be cross-interference issue, anti-interference is very weak.
Utility model content
For the weak point existed in above-mentioned technology, the utility model provides that a kind of cost is low, the track traffic PIS system display of strong interference immunity.
In order to achieve the above object, a kind of track traffic PIS of the utility model system display, comprises MCU single-chip microcomputer, difference rgb signal receiving circuit, difference audio signal reception circuit, image decoding circuit, display, audio frequency processing circuit and loudspeaker; Described image decoding circuit is electrically connected with difference rgb signal receiving circuit, and described audio frequency processing circuit is electrically connected with difference audio signal reception circuit, and described image decoding circuit and audio frequency processing circuit are electrically connected with MCU single-chip microcomputer respectively;
Described difference rgb signal receiving circuit receives the difference rgb signal on three groups of twisted-pair feeders, after the MCU Single-chip Controlling display color of image and bright dark change, by image information display over the display, difference audio signal reception circuit receives the audio frequency differential signal on one group of twisted-pair feeder, after MCU Single-chip Controlling sound size, audio-frequency information is played back by loudspeaker.
Wherein, this display also comprises display driver circuit, described display driver circuit is electrically connected with image decoding circuit, MCU single-chip microcomputer respectively, described display driver circuit will become picture signal through the decoded signals revivification of image processing circuit and show over the display, and described display is TFT-LCD LCDs.
Wherein, this display also comprises memory, and described memory is electrically connected with MCU single-chip microcomputer, and the audio-frequency information of the image information and audio frequency processing circuit process that receive image decoding circuit decoding is all stored in memory by described MCU single-chip microcomputer.
Wherein, this display also comprises power circuit, and described power circuit is electrically connected with MCU single-chip microcomputer, and the power supply energy in power circuit is delivered in image decoding circuit, audio frequency processing circuit, display driver circuit and memory by MCU single-chip microcomputer respectively.
Wherein, this display also comprises backlight control circuit, and described backlight control circuit one end is electrically connected with MCU single-chip microcomputer, and the other end is electrically connected with display TFT-LCD LCDs, described backlight control circuit receives the light source regulating command of MCU, and regulates the light source of image in display.
The beneficial effects of the utility model are:
Compared with prior art, track traffic PIS system display of the present utility model is sent into image processing circuit after being received by differential signal receiving circuit by receive on twisted-pair cable three groups of RGB differential signals and finally in TFT-LCD LCDs, restore picture signal after image processing circuit decoding, and difference audio frequency receiving circuit is that the audio frequency differential signal that one group of twisted-pair feeder receives is restored voice signal through decoding eventually through loudspeaker by sending into audio frequency processing circuit after inter-process.The utility model well solves the internal crosstalk problem in the Chief Technology Officer Distance Transmission of VGA audio frequency and video, and anti-interference is stronger, also eliminates the impact caused by EMI on long cable, owing to can use not shielded twisted-pair cable and reducing costs further.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the utility model track traffic PIS system display.
Main element symbol description is as follows:
10, difference rgb signal receiving circuit 11, difference audio signal reception circuit
12, image decoding circuit 13, audio frequency processing circuit
14, MCU single-chip microcomputer 15, display driver circuit
16, backlight control circuit 17, memory
18, display 19, loudspeaker
20, power circuit
Embodiment
In order to more clearly state the utility model, below in conjunction with accompanying drawing, the utility model is further described.
Consult Fig. 1, a kind of track traffic PIS of the utility model system display, comprises MCU single-chip microcomputer 14, difference rgb signal receiving circuit 10, difference audio signal reception circuit 11, image decoding circuit 12, display 18, audio frequency processing circuit 13 and loudspeaker 19; Image decoding circuit 12 is electrically connected with difference rgb signal receiving circuit 10, and audio frequency processing circuit 13 is electrically connected with difference audio signal reception circuit 11, and image decoding circuit 12 and audio frequency processing circuit 13 are electrically connected with MCU single-chip microcomputer 14 respectively;
Difference rgb signal receiving circuit 10 receives the difference rgb signal on three groups of twisted-pair feeders, after controlling the display color of image and bright dark change by MCU single-chip microcomputer 14, by image information display on display 18, difference audio signal reception circuit 11 receives the audio frequency differential signal on one group of twisted-pair feeder, after controlling sound size by MCU single-chip microcomputer 14, audio-frequency information is played back by loudspeaker 19.
Compared to prior art, track traffic PIS system display of the present utility model is sent into image processing circuit after being received by differential signal receiving circuit by receive on twisted-pair cable three groups of RGB differential signals and finally in TFT-LCD LCDs, restore picture signal after image processing circuit decoding, and difference audio frequency receiving circuit is that the audio frequency differential signal that one group of twisted-pair feeder receives is restored voice signal through decoding eventually through loudspeaker 19 by sending into audio frequency processing circuit 13 after inter-process.The utility model well solves the internal crosstalk problem in the Chief Technology Officer Distance Transmission of VGA audio frequency and video, and anti-interference is stronger, also eliminates the impact caused by EMI on long cable, owing to can use not shielded twisted-pair cable and reducing costs further.
In the present embodiment, this display 18 also comprises display driver circuit 15, display driver circuit 15 is electrically connected with image decoding circuit 12, MCU single-chip microcomputer 14 respectively, display driver circuit 15 will become picture signal through the decoded signals revivification of image processing circuit and show on display 18, and display 18 is TFT-LCD LCDs.Display driver circuit 15 and TFT-LCD LCDs are combinationally used and ensure that the complete high definition with image of the information displaying of image.
In the present embodiment, this display 18 also comprises memory 17, memory 17 is electrically connected with MCU single-chip microcomputer 14, and MCU single-chip microcomputer 14 will receive image information that image decoding circuit 12 decodes and the audio-frequency information that audio frequency processing circuit 13 processes all is stored in memory.Add device, memory 17 and be conducive to later stage calling for video and audio frequency.
In the present embodiment, this display 18 also comprises power circuit 20, power circuit 20 is electrically connected with MCU single-chip microcomputer 14, and the power supply energy in power circuit 20 is delivered in image decoding circuit 12, audio frequency processing circuit 13, display driver circuit 15 and memory by MCU single-chip microcomputer 14 respectively.The setting of power circuit 20 ensure that the energy of whole system provides.
In the present embodiment, this display 18 also comprises backlight control circuit 16, backlight control circuit 16 one end is electrically connected with MCU single-chip microcomputer 14, the other end is electrically connected with display 18TFT-LCD LCDs, backlight control circuit 16 receives the light source regulating command of MCU, and regulates the light source of image in display 18.Backlight control circuit 16 is responsible for providing light source to TFT-LCD liquid crystal display screen.
Advantage of the present utility model is:
1, the utility model well solves the internal crosstalk problem in the Chief Technology Officer Distance Transmission of VGA audio frequency and video, and anti-interference is stronger.
2, eliminate the impact on long cable caused by EMI, use not shielded twisted-pair cable, and reduce costs further.
3, display driver circuit 15 and TFT-LCD LCDs are combinationally used ensure that the complete high definition with image of the information displaying of image.
Be only several specific embodiment of the present utility model above, but the utility model is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection range of the present utility model.
Claims (5)
1. a track traffic PIS system display, is characterized in that, comprises MCU single-chip microcomputer, difference rgb signal receiving circuit, difference audio signal reception circuit, image decoding circuit, display, audio frequency processing circuit and loudspeaker; Described image decoding circuit is electrically connected with difference rgb signal receiving circuit, and described audio frequency processing circuit is electrically connected with difference audio signal reception circuit, and described image decoding circuit and audio frequency processing circuit are electrically connected with MCU single-chip microcomputer respectively;
Described difference rgb signal receiving circuit receives the difference rgb signal on three groups of twisted-pair feeders, by after the MCU Single-chip Controlling display color of image and bright dark change by image information display over the display, difference audio signal reception circuit receives the audio frequency differential signal on one group of twisted-pair feeder, after MCU Single-chip Controlling sound size, audio-frequency information is played back by loudspeaker.
2. track traffic PIS system display according to claim 1, it is characterized in that, this display also comprises display driver circuit, described display driver circuit is electrically connected with image decoding circuit, MCU single-chip microcomputer respectively, described display driver circuit will become picture signal through the decoded signals revivification of image processing circuit and show over the display, and described display is TFT-LCD LCDs.
3. track traffic PIS system display according to claim 2, it is characterized in that, this display also comprises memory, described memory is electrically connected with MCU single-chip microcomputer, and the audio-frequency information of the image information and audio frequency processing circuit process that receive image decoding circuit decoding is all stored in memory by described MCU single-chip microcomputer.
4. track traffic PIS system display according to claim 3, it is characterized in that, this display also comprises power circuit, described power circuit is electrically connected with MCU single-chip microcomputer, and the power supply energy in power circuit is delivered in image decoding circuit, audio frequency processing circuit, display driver circuit and memory by MCU single-chip microcomputer respectively.
5. track traffic PIS system display according to claim 1, it is characterized in that, this display also comprises backlight control circuit, described backlight control circuit one end is electrically connected with MCU single-chip microcomputer, the other end is electrically connected with display TFT-LCD LCDs, described backlight control circuit receives the light source regulating command of MCU, and regulates the light source of image in display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520397075.8U CN204721517U (en) | 2015-06-10 | 2015-06-10 | Track traffic PIS system display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520397075.8U CN204721517U (en) | 2015-06-10 | 2015-06-10 | Track traffic PIS system display |
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| Publication Number | Publication Date |
|---|---|
| CN204721517U true CN204721517U (en) | 2015-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520397075.8U Active CN204721517U (en) | 2015-06-10 | 2015-06-10 | Track traffic PIS system display |
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| Country | Link |
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| CN (1) | CN204721517U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562816A (en) * | 2020-05-11 | 2020-08-21 | 深圳市元基科技开发有限公司 | Touch display of intelligent interface for rail transit information management |
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2015
- 2015-06-10 CN CN201520397075.8U patent/CN204721517U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111562816A (en) * | 2020-05-11 | 2020-08-21 | 深圳市元基科技开发有限公司 | Touch display of intelligent interface for rail transit information management |
| CN111562816B (en) * | 2020-05-11 | 2020-12-15 | 深圳市元基科技开发有限公司 | Touch display of intelligent interface for rail transit information management |
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