CN203279022U - Audio playing circuit and TV - Google Patents
Audio playing circuit and TV Download PDFInfo
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- CN203279022U CN203279022U CN 201320279973 CN201320279973U CN203279022U CN 203279022 U CN203279022 U CN 203279022U CN 201320279973 CN201320279973 CN 201320279973 CN 201320279973 U CN201320279973 U CN 201320279973U CN 203279022 U CN203279022 U CN 203279022U
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Abstract
The utility model discloses an audio playing circuit and a TV with the audio playing circuit. The audio playing circuit comprises a control chip, a high pass filter sub circuit, a low pass filter sub circuit, a through sub circuit, a first audio amplifying sub circuit, a second audio amplifying sub circuit and an addition sub circuit. Input ends of the high pass filter sub circuit, the low pass filter sub circuit and the through sub circuit are connected with the control chip. An output end of the high pass filter sub circuit is connected with an input end of the addition sub circuit through the first audio amplifying sub circuit. An output end of the low pass filter sub circuit is connected with an input end of the addition sub circuit through the second audio amplifying sub circuit. An output end of the through sub circuit is connected with an input end of the addition sub circuit. The addition sub circuit adds signals of the input ends and outputs the signals to the corresponding sub circuit, and the audio playing is carried out. According to the audio playing circuit and the TV, the quality of audio playing is improved.
Description
Technical field
The utility model relates to TV technology, particularly a kind of audio playing circuit and television set.
Background technology
The film source of MP3 format is almost universal at present, and in view of its compression ratio is larger, capacity is little, liked by users.A lot of users also are delithted with the song of playing the MP3 film source on television set, but due to the compress mode of MP3 and the particularity of coded system, to cause larger loss to low frequency and high frequency when compression and coding, finally cause the high and low frequency details user None-identified of song to arrive, had a strong impact on the tonequality of music itself.
The utility model content
Main purpose of the present utility model is to provide a kind of audio playing circuit, is intended to improve the tonequality that audio frequency is play.
To achieve these goals, the utility model provides a kind of audio playing circuit, and this audio playing circuit comprises that control chip, high-pass filtering electronic circuit, low-pass filtering electronic circuit, straight-through electronic circuit, the first audio frequency amplify electronic circuit, the second audio frequency amplifies electronic circuit and addition electronic circuit; Wherein said high-pass filtering electronic circuit, low-pass filtering electronic circuit and the input that is connected electronic circuit connect and all to be connected with described control chip; The output of described high-pass filtering electronic circuit amplifies electronic circuit by the first audio frequency and is connected with the input of addition electronic circuit; The output of described low-pass filtering electronic circuit amplifies electronic circuit by the second audio frequency and is connected with the input of addition electronic circuit; The output of described straight-through electronic circuit is connected with the input of addition electronic circuit; Described addition electronic circuit carries out the signal of input to export corresponding power amplifier electronic circuit to after addition, carries out audio frequency and plays.
Preferably, described control chip comprises judging unit for judgement sheet Source Type, is used for decoding unit and the signal output pin of decompress(ion) film source; When described judging unit is judged described film source as the MP3 film source, output control signals to described decoding unit, the audio signal that this decoding unit will obtain after decoding according to described control signal exports described signal output pin to, and exports respectively the input of described high-pass filtering electronic circuit, low-pass filtering electronic circuit and straight-through electronic circuit to by described signal output pin.
Preferably, described high-pass filtering electronic circuit comprises the first operational amplifier, the first resistance, the second resistance, the 3rd resistance and the first electric capacity, wherein, the inverting input of described the first operational amplifier is by the first grounding through resistance, in-phase input end is connected with described signal output pin by the second resistance, and output is connected with the inverting input of this first operational amplifier by the 3rd resistance; One end of described the first electric capacity is connected with the in-phase input end of the first operational amplifier, other end ground connection.
Preferably, described the first audio frequency amplification electronic circuit comprises the second operational amplifier, the 4th resistance, the 5th resistance and the 6th resistance; Wherein the inverting input of the second operational amplifier is by the 4th grounding through resistance, and in-phase input end is connected with the output of described the first operational amplifier by the 5th resistance, and output is connected with the inverting input of this second operational amplifier by the 6th resistance.
Preferably, described low-pass filtering electronic circuit comprises the 3rd operational amplifier, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the second electric capacity and the 3rd electric capacity, wherein, the inverting input of described the 3rd operational amplifier is by the 7th grounding through resistance, in-phase input end is connected with described signal output pin with the 3rd electric capacity by the second electric capacity of series connection successively, and output is connected with the inverting input of the 3rd operational amplifier by the 8th resistance; One end of the 9th resistance is connected with the common port of described the second electric capacity and the 3rd electric capacity, and the other end is connected with the output of described the 3rd operational amplifier; One end of the tenth resistance is connected with the in-phase input end of described the 3rd operational amplifier, other end ground connection.
Preferably, described the second audio frequency amplification electronic circuit comprises four-operational amplifier, the 11 resistance, the 12 resistance and the 13 resistance; Wherein the inverting input of four-operational amplifier is by the 11 grounding through resistance, in-phase input end is connected with the output of described the 3rd operational amplifier by the 12 resistance, and output is connected with the inverting input of this four-operational amplifier by the 13 resistance.
Preferably, described addition electronic circuit comprises the 5th operational amplifier, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and the 19 resistance; Wherein the in-phase input end of the 5th operational amplifier is connected with the output of described straight-through electronic circuit by the 14 resistance, be connected with the output that described the first audio frequency amplifies electronic circuit by the 15 resistance, be connected with the output that described the second audio frequency amplifies electronic circuit by the 16 resistance, by the 17 grounding through resistance; The inverting input of described the 5th operational amplifier is connected by the output of the 19 resistance with the 5th operational amplifier by the 18 grounding through resistance.
The utility model also provides a kind of television set, this television set comprises audio playing circuit, and this audio playing circuit comprises that control chip, high-pass filtering electronic circuit, low-pass filtering electronic circuit, straight-through electronic circuit, the first audio frequency amplify electronic circuit, the second audio frequency amplifies electronic circuit and addition electronic circuit; Wherein said high-pass filtering electronic circuit, low-pass filtering electronic circuit and the input that is connected electronic circuit connect and all to be connected with described control chip; The output of described high-pass filtering electronic circuit amplifies electronic circuit by the first audio frequency and is connected with the input of addition electronic circuit; The output of described low-pass filtering electronic circuit amplifies electronic circuit by the second audio frequency and is connected with the input of addition electronic circuit; The output of described straight-through electronic circuit is connected with the input of addition electronic circuit; Described addition electronic circuit carries out the signal of input to export corresponding power amplifier electronic circuit to after addition, carries out audio frequency and plays.
The utility model obtains audio signal, and exports respectively this audio signal to high-pass filtering electronic circuit, low-pass filtering electronic circuit and straight-through electronic circuit after by control chip, the MP3 film source being decoded.By the high-pass filtering electronic circuit, the audio signal medium-high frequency is partly separated, and amplified by the first audio frequency the input that exports the addition electronic circuit after electronic circuit amplifies to; By the low-pass filtering electronic circuit, the audio signal medium and low frequency is partly separated, and amplified by the second audio frequency the input that exports the addition electronic circuit after electronic circuit amplifies to; Directly audio signal is exported to the input of addition electronic circuit by straight-through electronic circuit.Three part signals export corresponding power amplifier electronic circuit to after the addition electronic circuit carries out addition process, thereby realize the audio frequency broadcast.Because the high and low frequency to the decoded audio signal of MP3 film source amplifies respectively processing, therefore effectively improved the EQ value of high and low frequency, thereby promoted MP3 tonequality.
Description of drawings
Fig. 1 is the structural representation of the utility model audio playing circuit one embodiment;
Fig. 2 is the structural representation of control chip in Fig. 1;
Fig. 3 is the circuit diagram of high-pass filtering electronic circuit in Fig. 1;
Fig. 4 is the circuit diagram that in Fig. 1, the first audio frequency amplifies electronic circuit;
Fig. 5 is the circuit diagram of low-pass filtering electronic circuit in Fig. 1;
Fig. 6 is the circuit diagram that in Fig. 1, the second audio frequency amplifies electronic circuit;
Fig. 7 is the circuit diagram of addition electronic circuit in Fig. 1.
The realization of the utility model purpose, functional characteristics and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
Should be appreciated that specific embodiment described herein only in order to explaining the utility model, and be not used in restriction the utility model.
The utility model provides a kind of audio playing circuit.
With reference to Fig. 1, Fig. 1 is the structural representation of the utility model audio playing circuit one embodiment.The audio playing circuit that the present embodiment provides comprises that control chip 10, high-pass filtering electronic circuit 20, low-pass filtering electronic circuit 30, straight-through electronic circuit 40, the first audio frequency amplify electronic circuit 50, the second audio frequency amplifies electronic circuit 60 and addition electronic circuit 70; Wherein said high-pass filtering electronic circuit 20, low-pass filtering electronic circuit 30 and the input that is connected electronic circuit 40 connect and all to be connected with described control chip 10; The output of described high-pass filtering electronic circuit 20 amplifies electronic circuit 50 by the first audio frequency and is connected with the input of addition electronic circuit 70; The output of described low-pass filtering electronic circuit 30 amplifies electronic circuit 60 by the second audio frequency and is connected with the input of addition electronic circuit 70; The output of described straight-through electronic circuit 40 is connected with the input of addition electronic circuit 70; Described addition electronic circuit 70 carries out the signal of input to export corresponding power amplifier electronic circuit to after addition, carries out audio frequency and plays.
The utility model obtains audio signal, and exports respectively this audio signal to high-pass filtering electronic circuit 20, low-pass filtering electronic circuit 30 and straight-through electronic circuit 40 after by control chip 10, the MP3 film source being decoded.By high-pass filtering electronic circuit 20, the audio signal medium-high frequency is partly separated, and amplified by the first audio frequency the input that exports addition electronic circuit 70 after electronic circuit 50 amplifies to; By low-pass filtering electronic circuit 30, the audio signal medium and low frequency is partly separated, and amplified by the second audio frequency the input that exports addition electronic circuit 70 after electronic circuit 60 amplifies to; Directly audio signal is exported to the input of addition electronic circuit 70 by straight-through electronic circuit.Three part signals export corresponding power amplifier electronic circuit to after addition electronic circuit 70 carries out addition process, thereby realize the audio frequency broadcast.Because the high and low frequency to the decoded audio signal of MP3 film source amplifies respectively processing, therefore effectively improved the EQ value (ratio of audio frequency signal amplitude and frequency) of high and low frequency, thereby promoted MP3 tonequality.
In conjunction with reference to Fig. 2, Fig. 2 is the structural representation of control chip in Fig. 1.In the present embodiment, above-mentioned control chip 10 comprises judging unit 101 for judgement sheet Source Type, is used for decoding unit 102 and the signal output pin 103 of decompress(ion) film source; When described judging unit 101 is judged described film source as the MP3 film source, output control signals to described decoding unit 102, the audio signal that this decoding unit 102 will obtain after decoding according to described control signal exports described signal output pin 103 to, and exports respectively the input of described high-pass filtering electronic circuit 20, low-pass filtering electronic circuit 30 and straight-through electronic circuit 40 to by described signal output pin 103.
In the present embodiment, when control chip 10 receives extraneous film source, at first judged the type of these film sources by judging unit 101, and when film source is the MP3 film source, this judging unit 101 will be exported one and control signal to decoding unit 102; The audio signal that decoding unit 102 will obtain after decoding after the MP3 film source is decoded according to this control signal exports signal output pin 103 to, from this signal output pin 103, audio signal is exported respectively to the input of described high-pass filtering electronic circuit 20, low-pass filtering electronic circuit 30 and straight-through electronic circuit 40, processed accordingly by high-pass filtering electronic circuit 20, low-pass filtering electronic circuit 30 and 40 pairs of these audio signals of straight-through electronic circuit.
In conjunction with reference to Fig. 3 and Fig. 4, Fig. 3 is the circuit diagram of high-pass filtering electronic circuit in Fig. 1, and Fig. 4 is the circuit diagram that in Fig. 1, the first audio frequency amplifies electronic circuit.Based on above-described embodiment, in the present embodiment, above-mentioned high-pass filtering electronic circuit 20 comprises the first operational amplifier U1, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3 and the first capacitor C 1, wherein, the inverting input of described the first operational amplifier U1 is by the first resistance R 1 ground connection, in-phase input end is connected with described signal output pin 103 by the second resistance R 2, and output is connected with the inverting input of this first operational amplifier U1 by the 3rd resistance R 3; One end of described the first capacitor C 1 is connected with the in-phase input end of the first operational amplifier U1, other end ground connection.
Above-mentioned the first audio frequency amplifies electronic circuit 50 and comprises the second operational amplifier U2, the 4th resistance R 4, the 5th resistance R 5 and the 6th resistance R 6; Wherein the inverting input of the second operational amplifier U2 is by the 4th resistance R 4 ground connection, in-phase input end is connected with the output of described the first operational amplifier U1 by the 5th resistance R 5, and output is connected with the inverting input of this second operational amplifier U2 by the 6th resistance R 6.
In the present embodiment, the large I of signal frequency that obtains after above-mentioned high-pass filtering electronic circuit 20 filtering arranges according to actual needs, for example, can be by adjusting the parameter of the second resistance R 2 and the first capacitor C 1, be audio signal greater than 3000Hz thereby make by the frequency that obtains after 20 filtering of high-pass filtering electronic circuit.The multiple that 50 pairs of frequencies of above-mentioned the first audio frequency amplification electronic circuit are amplified greater than the audio signal of 3000Hz can arrange according to actual needs, preferably, can be by regulating the resistance of the 4th resistance R 4 and the 5th resistance R 5 in the present embodiment, making the first audio frequency amplify electronic circuit 50 will be to the amplitude lifting 2dB of frequency greater than the audio signal of 3000Hz.
Please in the lump with reference to Fig. 5 and Fig. 6, Fig. 5 is the circuit diagram of low-pass filtering electronic circuit in Fig. 1, and Fig. 6 is the circuit diagram that in Fig. 1, the second audio frequency amplifies electronic circuit.Based on above-described embodiment, in the present embodiment, above-mentioned low-pass filtering electronic circuit 30 comprises the 3rd operational amplifier U3, the 7th resistance R 7, the 8th resistance R 8, the 9th resistance R 9, the tenth resistance R 10, the second capacitor C 2 and the 3rd capacitor C 3, wherein, the inverting input of described the 3rd operational amplifier U3 is by the 7th resistance R 7 ground connection, in-phase input end is connected with described signal output pin 103 with the 3rd capacitor C 3 by the second capacitor C 2 of series connection successively, and output is connected with the inverting input of the 3rd operational amplifier U3 by the 8th resistance R 8; One end of the 9th resistance R 9 is connected with the common port of described the second capacitor C 2 and the 3rd capacitor C 3, and the other end is connected with the output of described the 3rd operational amplifier U3; One end of the tenth resistance R 10 is connected with the in-phase input end of described the 3rd operational amplifier U3, other end ground connection.
Above-mentioned the second audio frequency amplifies electronic circuit 60 and comprises four-operational amplifier U4, the 11 resistance R 11, the 12 resistance R 12 and the 13 resistance R 13; Wherein the inverting input of four-operational amplifier U4 is by the 11 resistance R 11 ground connection, in-phase input end is connected with the output of described the 3rd operational amplifier U3 by the 12 resistance R 12, and output is connected with the inverting input of this four-operational amplifier U4 by the 13 resistance R 13.
In the present embodiment, the large I of signal frequency that obtains after above-mentioned low-pass filtering electronic circuit 30 filtering arranges according to actual needs, for example, can be by adjusting the parameter of the second capacitor C 2, the 3rd capacitor C 3, the 9th resistance R 9 and the tenth resistance R 10, be audio signal less than 200Hz thereby make by the frequency that obtains after 30 filtering of low-pass filtering electronic circuit.The multiple that 60 pairs of frequencies of above-mentioned the second audio frequency amplification electronic circuit are amplified less than the audio signal of 200Hz can arrange according to actual needs, preferably, can be by regulating the resistance of the 11 resistance R 11 and the 13 resistance R 13 in the present embodiment, making the first audio frequency amplify electronic circuit 60 will be to the amplitude lifting 2dB of frequency less than the audio signal of 200Hz.
In conjunction with reference to Fig. 7, Fig. 7 is the circuit diagram of addition electronic circuit in Fig. 1.Based on above-described embodiment, in the present embodiment, above-mentioned addition electronic circuit 70 comprises the 5th operational amplifier U5, the 14 resistance R 14, the 15 resistance R 15, the 16 resistance R 16, the 17 resistance R 17, the 18 resistance R 18 and the 19 resistance R 19; Wherein the in-phase input end of the 5th operational amplifier U5 is connected with the output of described straight-through electronic circuit 40 by the 14 resistance R 14, be connected with the output that described the first audio frequency amplifies electronic circuit 50 by the 15 resistance R 15, be connected with the output that described the second audio frequency amplifies electronic circuit 60 by the 16 resistance R 16, by the 17 resistance R 17 ground connection; The inverting input of described the 5th operational amplifier U5 is connected with the output of the 5th operational amplifier U5 by the 19 resistance R 19 by the 18 resistance R 18 ground connection.
In the present embodiment, HFS signal by high-pass filtering electronic circuit 20, the low frequency part signal by low-pass filtering electronic circuit 30 and the audio signal by straight-through electronic circuit 40 are after in-phase input end place's addition of the 5th operational amplifier U5, output through the 5th operational amplifier exports corresponding power amplifier electronic circuit to, carries out audio frequency and plays.
The utility model also provides a kind of panel TV set, and this panel TV set comprises audio playing circuit, and the structure of this audio playing circuit can with reference to above-described embodiment, not repeat them here.Naturally, adopted the technical scheme of above-mentioned audio playing circuit due to the panel TV set of the present embodiment, so this panel TV set have all beneficial effects of above-mentioned audio playing circuit.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or equivalent flow process conversion that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (8)
1. an audio playing circuit, is characterized in that, comprises that control chip, high-pass filtering electronic circuit, low-pass filtering electronic circuit, straight-through electronic circuit, the first audio frequency amplify electronic circuit, the second audio frequency amplifies electronic circuit and addition electronic circuit; Wherein said high-pass filtering electronic circuit, low-pass filtering electronic circuit and the input that is connected electronic circuit connect and all to be connected with described control chip; The output of described high-pass filtering electronic circuit amplifies electronic circuit by the first audio frequency and is connected with the input of addition electronic circuit; The output of described low-pass filtering electronic circuit amplifies electronic circuit by the second audio frequency and is connected with the input of addition electronic circuit; The output of described straight-through electronic circuit is connected with the input of addition electronic circuit; Described addition electronic circuit carries out the signal of input to export corresponding power amplifier electronic circuit to after addition, carries out audio frequency and plays.
2. audio playing circuit as claimed in claim 1, is characterized in that, described control chip comprises for the judging unit of judgement sheet Source Type, is used for decoding unit and the signal output pin of decompress(ion) film source; When described judging unit is judged described film source as the MP3 film source, output control signals to described decoding unit, the audio signal that this decoding unit will obtain after decoding according to described control signal exports described signal output pin to, and exports respectively the input of described high-pass filtering electronic circuit, low-pass filtering electronic circuit and straight-through electronic circuit to by described signal output pin.
3. audio playing circuit as claimed in claim 2, it is characterized in that, described high-pass filtering electronic circuit comprises the first operational amplifier, the first resistance, the second resistance, the 3rd resistance and the first electric capacity, wherein, the inverting input of described the first operational amplifier is by the first grounding through resistance, in-phase input end is connected with described signal output pin by the second resistance, and output is connected with the inverting input of this first operational amplifier by the 3rd resistance; One end of described the first electric capacity is connected with the in-phase input end of the first operational amplifier, other end ground connection.
4. audio playing circuit as claimed in claim 3, is characterized in that, described the first audio frequency amplifies electronic circuit and comprises the second operational amplifier, the 4th resistance, the 5th resistance and the 6th resistance; Wherein the inverting input of the second operational amplifier is by the 4th grounding through resistance, and in-phase input end is connected with the output of described the first operational amplifier by the 5th resistance, and output is connected with the inverting input of this second operational amplifier by the 6th resistance.
5. audio playing circuit as claimed in claim 2, it is characterized in that, described low-pass filtering electronic circuit comprises the 3rd operational amplifier, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, the second electric capacity and the 3rd electric capacity, wherein, the inverting input of described the 3rd operational amplifier is by the 7th grounding through resistance, in-phase input end is connected with described signal output pin with the 3rd electric capacity by the second electric capacity of series connection successively, and output is connected with the inverting input of the 3rd operational amplifier by the 8th resistance; One end of the 9th resistance is connected with the common port of described the second electric capacity and the 3rd electric capacity, and the other end is connected with the output of described the 3rd operational amplifier; One end of the tenth resistance is connected with the in-phase input end of described the 3rd operational amplifier, other end ground connection.
6. audio playing circuit as claimed in claim 5, is characterized in that, described the second audio frequency amplifies electronic circuit and comprises four-operational amplifier, the 11 resistance, the 12 resistance and the 13 resistance; Wherein the inverting input of four-operational amplifier is by the 11 grounding through resistance, in-phase input end is connected with the output of described the 3rd operational amplifier by the 12 resistance, and output is connected with the inverting input of this four-operational amplifier by the 13 resistance.
7. audio playing circuit as described in any one in claim 1 to 6, it is characterized in that, described addition electronic circuit comprises the 5th operational amplifier, the 14 resistance, the 15 resistance, the 16 resistance, the 17 resistance, the 18 resistance and the 19 resistance; Wherein the in-phase input end of the 5th operational amplifier is connected with the output of described straight-through electronic circuit by the 14 resistance, be connected with the output that described the first audio frequency amplifies electronic circuit by the 15 resistance, be connected with the output that described the second audio frequency amplifies electronic circuit by the 16 resistance, by the 17 grounding through resistance; The inverting input of described the 5th operational amplifier is connected by the output of the 19 resistance with the 5th operational amplifier by the 18 grounding through resistance.
8. a television set, is characterized in that, comprises as audio playing circuit as described in any one in claim 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320279973 CN203279022U (en) | 2013-05-21 | 2013-05-21 | Audio playing circuit and TV |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320279973 CN203279022U (en) | 2013-05-21 | 2013-05-21 | Audio playing circuit and TV |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203279022U true CN203279022U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320279973 Expired - Fee Related CN203279022U (en) | 2013-05-21 | 2013-05-21 | Audio playing circuit and TV |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203279022U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160180859A1 (en) * | 2014-12-17 | 2016-06-23 | Hon Hai Precision Industry Co., Ltd. | Audio signal processing circuit |
-
2013
- 2013-05-21 CN CN 201320279973 patent/CN203279022U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160180859A1 (en) * | 2014-12-17 | 2016-06-23 | Hon Hai Precision Industry Co., Ltd. | Audio signal processing circuit |
| US9705464B2 (en) * | 2014-12-17 | 2017-07-11 | Hon Hai Precision Industry Co., Ltd. | Audio signal processing circuit |
| TWI637638B (en) * | 2014-12-17 | 2018-10-01 | 新加坡商雲網科技新加坡有限公司 | Audio signal processing circuit |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131106 Termination date: 20200521 |