CN201349268Y - Liquid crystal display television and interface circuit thereof - Google Patents
Liquid crystal display television and interface circuit thereof Download PDFInfo
- Publication number
- CN201349268Y CN201349268Y CNU200820235071XU CN200820235071U CN201349268Y CN 201349268 Y CN201349268 Y CN 201349268Y CN U200820235071X U CNU200820235071X U CN U200820235071XU CN 200820235071 U CN200820235071 U CN 200820235071U CN 201349268 Y CN201349268 Y CN 201349268Y
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- interface
- lcd
- circuit
- hdmi
- switching circuit
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- 238000010586 diagram Methods 0.000 description 3
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- 230000003068 static effect Effects 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model is suitable for television area and provides a liquid crystal display television and interface circuit thereof, wherein the interface circuit of the liquid crystal display television comprises a first high definition multimedia interface, a second high definition multimedia interface and a switching circuit, the first high definition multimedia interface is connected to the first input end of the switching circuit, the second high definition multimedia interface is connected to the second input end of the switching circuit, and the output end of the switching circuit is connected with a main central processing unit of the liquid crystal display television. A plurality of high definition multimedia interfaces are arranged in the interface circuit of the liquid crystal display television provided by the utility model, and the signals of the high definition multimedia interfaces are switched over through the switching circuit, thereby meeting various needs of users and giving users great convenience.
Description
Technical field
The utility model belongs to field of television, relates in particular to a kind of interface circuit and LCD TV of LCD TV.
Background technology
HDMI (High Definition Multimedia Interface) (HighDefinition Multimedia Interface that can only integrated 1 tunnel in existing (below 26 cun) LCD TV, HDMI) interface, wherein, the HDMI interface can provide the data transfer bandwidth up to 5Gbps, can transmit the audio signal and the high definition video signal that do not have compression; Need not simultaneously to transmit advance capable D/A or mould/number conversion, can guarantee that the video-audio signal of first water transmits at signal.
If the user wants computer HDMI interface is connected with LCD TV, also want simultaneously the HDMI interface of blue-ray DVD is connected with LCD TV, also want the HDMI interface of PS3 game machine is connected with LCD TV, 1 road HDMI interface in the LCD TV is nowhere near so; Caused great inconvenience to the user like this.
The utility model content
The purpose of this utility model is to provide a kind of interface circuit of LCD TV, is intended to solve and has only 1 road HDMI interface to cause user's inconvenient problem with use in the existing LCD TV.
The utility model is achieved in that a kind of interface circuit of LCD TV, comprising:
The one HDMI interface, the 2nd HDMI interface and switch switching circuit;
A described HDMI interface is connected to the first input end of described switch switching circuit, and described the 2nd HDMI interface is connected to second input of described switch switching circuit, and the output of described switch switching circuit is connected with the LCD TV host CPU.
Another purpose of the present utility model is to provide a kind of LCD TV that adopts the interface circuit of above-mentioned LCD TV.
Integrated a plurality of HDMI interfaces in the interface circuit of the LCD TV that the utility model embodiment provides, and switch by the signal of switch switching circuit to a plurality of HDMI interfaces, satisfied user's multiple demand, bring great advantage to the user.
Description of drawings
Fig. 1 is the structure chart of the interface circuit of the LCD TV that provides of the utility model embodiment;
Fig. 2 is the circuit diagram of a HDMI interface in the interface circuit of the LCD TV that provides of the utility model embodiment;
Fig. 3 is the circuit diagram of the interface circuit of the LCD TV that provides of the utility model embodiment.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Integrated a plurality of HDMI interfaces in the interface circuit of the LCD TV that the utility model embodiment provides can satisfy user's multiple demand, bring great advantage to the user.
The interface circuit of the LCD TV that the utility model provides is mainly used in the LCD TV, and its structure for convenience of explanation, only shows the part relevant with the utility model as shown in Figure 1, and details are as follows.
The interface circuit of LCD TV comprises: a HDMI interface 1, the 2nd HDMI interface 2 and switch switching circuit 4; Wherein, a HDMI interface 1 is connected to the first input end of switch switching circuit 4, and the 2nd HDMI interface 2 is connected to second input of switch switching circuit 4, and the output of switch switching circuit 4 is connected with LCD TV host CPU 5.
In the utility model embodiment, a HDMI interface 1 is arranged at the rear end of LCD TV.
Fig. 2 shows the circuit diagram of a HDMI interface 1, for convenience of explanation, only shows the part relevant with the utility model, and details are as follows.
The one HDMI interface 1 comprises chip XS401, chip XS401 comprises 23 pins, wherein, the 1-19 pin is effective pin, the 20-23 pin is the grounding leg of fixing, the HDMI signal is sent into by three differential pair interfaces of the DATA0-DATA2 among the pin 1-9, is connected with the LCD TV host CPU through switch switching circuit; The 10th pin and the 12nd pin are the clock differential pairs, the 13rd pin is the CEC pin, the 15th pin and the 16th pin are the pins of I2C, also connect the U405 that adorns EDID after inserting the LCD TV host CPU, this U405 mainly is the form of the Voice ﹠ Video of dress HDMI, the 19th pin is a HOT PLUG pin, when inserting LCD TV, external equipment uses, the 18th pin+POWER of 5v sends into the 19th pin through resistance R 430, when Equipment Inspection can be shaken hands by I2c and LCD TV host CPU during to high level, DATA0-DATA2 send the HDMI signal to give the liquid crystal TV then, the effect of Q402 is when EDID is not ready for, host CPU will be sent out a high level Q402 conducting is made 19 pin level step-downs, and this moment, peripheral hardware just can not read the EDID data of U405 the inside, avoided makeing mistakes; 3 BAV99 are used for discharging the static that produces when plugging.
In the utility model embodiment, the 2nd HDMI interface 2 is arranged at the rear end of LCD TV; The circuit of the 2nd HDMI interface 2 is the same with the circuit of a HDMI interface 1, does not repeat them here.
In the utility model embodiment, interface circuit also comprises the first esd protection pipe and the second esd protection pipe, and wherein, the first esd protection pipe is connected to the data terminal DATA0-DATA2 of a HDMI interface 1; The second esd protection pipe is connected to the data terminal DATA0-DATA2 of the 2nd HDMI interface 2; Be used for static discharge, the HDMI interface is protected.
In the utility model embodiment, the interface circuit of LCD TV also comprises the 3rd HDMI interface 3, is connected to the 3rd input of switch switching circuit 4; The 3rd HDMI interface 3 is the HDMI interface, is arranged at the side of LCD TV.
Fig. 3 shows the circuit of the interface circuit of the LCD TV that the utility model embodiment provides, and for convenience of explanation, only shows the part relevant with the utility model, and details are as follows.
When all having signal to insert in a HDMI interface 1, the 2nd HDMI interface 2 and the 3rd HDMI interface 3, the user selects signalling channel (as the TV signal by remote controller or the button of pressing LCD TV, the AV signal, the HDMI signal), the user to select corresponding HDMI according to the needs of oneself be corresponding HDMI interface.After LCD TV host CPU 5 receives remote controller or push button signalling, which signal recognizes the user by remote keying decoding needs just go control switch commutation circuit 4 to remove to open corresponding HDMI interface, allows the signal of this module be sent to by switch switching circuit 1 and delivers to the LCD TV screen after LCD TV host CPU 5 is handled and show.
Integrated a plurality of HDMI interfaces in the interface circuit of the LCD TV that the utility model embodiment provides, and switch by the signal of switch switching circuit to a plurality of HDMI interfaces, satisfied user's multiple demand, bring great advantage to the user.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection range of the present utility model.
Claims (9)
1, a kind of interface circuit of LCD TV is characterized in that, described interface circuit comprises:
The one HDMI interface, the 2nd HDMI interface and switch switching circuit;
A described HDMI interface is connected to the first input end of described switch switching circuit, and described the 2nd HDMI interface is connected to second input of described switch switching circuit, and the output of described switch switching circuit is connected with the LCD TV host CPU.
2, the interface circuit of LCD TV as claimed in claim 1 is characterized in that, a described HDMI interface is arranged at the rear end of described LCD TV.
3, the interface circuit of LCD TV as claimed in claim 2 is characterized in that, described interface circuit also comprises the first esd protection pipe, is connected to the data terminal of a described HDMI interface.
4, the interface circuit of LCD TV as claimed in claim 1 is characterized in that, described the 2nd HDMI interface is arranged at the rear end of described LCD TV.
5, the interface circuit of LCD TV as claimed in claim 4 is characterized in that, described interface circuit also comprises the second esd protection pipe, is connected to the data terminal of described the 2nd HDMI interface.
6, the interface circuit of LCD TV as claimed in claim 1 is characterized in that, described interface circuit also comprises the 3rd HDMI interface, is connected to the 3rd input of described switch switching circuit.
7, the interface circuit of LCD TV as claimed in claim 1 is characterized in that, described the 3rd HDMI interface block is arranged at the side of described LCD TV.
8, the interface circuit of LCD TV as claimed in claim 1 is characterized in that, described switch switching circuit adopts the PS321 chip.
9, a kind of LCD TV is characterized in that, described LCD TV comprises the interface circuit of each described LCD TV of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820235071XU CN201349268Y (en) | 2008-12-15 | 2008-12-15 | Liquid crystal display television and interface circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU200820235071XU CN201349268Y (en) | 2008-12-15 | 2008-12-15 | Liquid crystal display television and interface circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201349268Y true CN201349268Y (en) | 2009-11-18 |
Family
ID=41368733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU200820235071XU Expired - Fee Related CN201349268Y (en) | 2008-12-15 | 2008-12-15 | Liquid crystal display television and interface circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201349268Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065910A (en) * | 2013-03-18 | 2014-09-24 | 联发科技股份有限公司 | Termination Circuits |
| CN104103924A (en) * | 2013-04-02 | 2014-10-15 | 华为终端有限公司 | High definition multimedia interface hdmi interface unit and multimedia terminal |
| WO2021036207A1 (en) * | 2019-08-27 | 2021-03-04 | 海信视像科技股份有限公司 | Display device |
-
2008
- 2008-12-15 CN CNU200820235071XU patent/CN201349268Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104065910A (en) * | 2013-03-18 | 2014-09-24 | 联发科技股份有限公司 | Termination Circuits |
| CN104065910B (en) * | 2013-03-18 | 2017-10-24 | 联发科技股份有限公司 | Terminating circuit |
| CN104103924A (en) * | 2013-04-02 | 2014-10-15 | 华为终端有限公司 | High definition multimedia interface hdmi interface unit and multimedia terminal |
| US9807451B2 (en) | 2013-04-02 | 2017-10-31 | Huawei Device Co., Ltd. | High-definition multimedia interface HDMI unit and multimedia terminal |
| WO2021036207A1 (en) * | 2019-08-27 | 2021-03-04 | 海信视像科技股份有限公司 | Display device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091118 Termination date: 20111215 |