CN1138408C - Intelligent TV receiving system - Google Patents
Intelligent TV receiving system Download PDFInfo
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- CN1138408C CN1138408C CNB001066730A CN00106673A CN1138408C CN 1138408 C CN1138408 C CN 1138408C CN B001066730 A CNB001066730 A CN B001066730A CN 00106673 A CN00106673 A CN 00106673A CN 1138408 C CN1138408 C CN 1138408C
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Abstract
The present invention relates to an intelligent television receiving system which comprises a remote controller and a television, wherein a wireless receiving device, a CPU I, a memory I, a clock circuit and a liquid crystal display are additionally arranged in the remote controller on the basis of the prior art, and the built-in control part of the television comprises a remote control receiver, a memory, a CPU II, a wave band decoder, a television signal receiver, an electric tuning high frequency head and an image output device. The intelligent television receiving system can realize the functions of wireless reception, automatic storage, program menu display, television program preselection, automatic turn-on on schedule and automatic switching, and great convenience is provided for wide television users in terms of program watch according to personal fondness.
Description
Technical field
The present invention relates to a kind of TV receiving system.
Background technology
Television set as a kind of advanced person mass medium instrument efficiently, has almost been come into each family, and has been liked by the each age group personage day by day, and in recent years, along with growth in the living standard, people were also more and more higher to the requirement of television set.So picture-in-picture, high definition, stereo, super large, super television product such as flat, ultra-thin emerge in an endless stream, television industries is flourishing as never before.Yet when enjoying these advanced sensory functions, people are at a loss as to what to do sometimes, and platform is not changed in the residence, does not but know to see what program.Sometimes certain program is seen in plan for a long time, but only sees an ending because forget for the moment.The advertisement of intercutting in TV play is abhored, changed to other but work as you, when gaining, program has begun good a few minutes again.Sometimes the interim changed information of Pgmtime because of do not see that TV station broadcasts below screen, and missed a very good program.Now, cable TV has tens channels, and which but forgets is for what platform.
Summary of the invention
The purpose of this invention is to provide a kind of TV receiving system, make it can realize wireless receiving, store also display program menu function automatically, realize the TV programme chosen in advance, to time Auto Power On, automatic switching function.
For achieving the above object, the present invention is by the following technical solutions: a kind of intelligent TV receiving system, comprise remote controller and television set, remote controller comprises keyboard matrix, command encoder, symbol modulator and infrared launcher, the keyboard matrix input command, these orders are converted into binary code in command encoder, code is modulated through symbol modulator, export by infrared launcher, realization is to the remote control of TV, the machine inner control of television set partly comprises receiver of remote-control sytem, memory I I, CPUII, the wave band decoder, TV signal receiver, varactor tuner and video picture output device, the signal that is sent by remote controller sends to CPUII through receiver of remote-control sytem, if change the platform signal, CPUII just reads the frequency range and the wave band voltage of selected channel from memory I I, output to the wave band decoder, again through the effect of varactor tuner, TV signal output with selected channel, if other signal, CPUII will signal to function control circuit, realize the adjusting of function, remote controller also comprises radio receiver, CPUI, memory 1, clock circuit and LCD, radio receiver is used to receive the programme information or the program modification information of each TV station that transmitting station sends, and under the control of CPUI, be stored in the memory I, keyboard matrix by remote controller can be provided with default program and personal like's information and be stored in the memory I I, and default program and personal like's information are received and are stored in the memory I I by receiver of remote-control sytem in the machine by the remote controller emission; Behind the selected station synchronization of user, CPUI finds the channel of this station synchronization correspondence in the memory I, sends then and changes the platform order to symbol modulator, and channel information is issued machine inner control part, realizes from moving the platform function; It is similar with default program to set " personal like " column, just more emphasizes the periodicity of column, needs storage column purpose frequency, when every column begins soon, realizes Auto Power On, automatic switching function equally; If when inquiry, selected a program At All Other Times from remote controller, CPUI will read this programme information from memory I, comprise channel, date, time started, concluding time, and be stored in default program part, simultaneously partly send information to the machine inner control, with this information storage in the default program part of memory I I, cooperate be implemented in selected program and begin before, automatically switch to program place channel functions, promptly read the program channel of default program part stack top, then with the frequency range of this channel, wave band voltage is issued wave band decoding, realizes from moving platform; Before switching, should provide information on the video screen, and provide three options " execution ", " this program finishes the back to be carried out ", " do not switch " for the user and select, also can be set at and not show, simultaneously, demonstrate the information such as channel, title, time started of title, channel, concluding time and the next program of current program on the remote controller, and it is selective to provide information, if default program broadcasting time near, and TV is not also opened, CPUII will send starting-up signal before program broadcasts, turn on TV, and switch to corresponding channel.
Machine inner control part also is included as the clock circuit that CPUII provides the clock reference signal.
Programme information comprises automatic storage operation sign indicating number and programme information, and wherein the storage operation sign indicating number is used for being implemented in the CPUI control interior automatic storage of programme information memory I down automatically, and programme information comprises code, title and the programme content thereof of each TV station.
Programme modification information comprises automatic retouching operation sign indicating number and amended programme content, the latter comprises TV station's code, change before time and change information such as back time.
Default programme information is stored with the stack architecture that last in, first out in memory I and memory I I, default programme information comprises channel, broadcasts date, program start time and program end time, and default Pgmtime is to back television set Auto Power On or automatically switch to corresponding channel under the control of CPUII.
Personal like's information is stored according to round-robin queue's structure with the setting-up time order in memory I and memory I I, current or the present nearest personal like's information of distance of pointed, comprise storage of channel, broadcast frequency, program start and end time, personal like's Pgmtime is to back television set Auto Power On or automatically switch to corresponding channel under the control of CPUII.
The information that transmitting station sends also comprises clock alignment information, comprises clock alignment command code and current correct time.
For the commercial breaks in personal like's program broadcast process, the signal that can utilize remote controller to send when advertisement begins and finish is stored in the time started and the perdurabgility thereof of breaking for commercialsy in the memory I I, later on this program when broadcasting here television set with display reminding information or automatically switch to other hobby program, and the Hui Yuantai that after advertisement, automaticallyes switch, reach the shielding advertising function with this.
After the selected TV station's (or program) of user, CPUI finds the corresponding channel of this TV station (program) in memory I, send then and change the platform order to symbol modulator, and channel information is issued machine inner control part, realizes from moving the platform function.
The user can utilize the channel of remote controller sequential query TV station correspondence, or selects the corresponding TV station of channel query.
Because the present invention has set up radio receiver and CPUI in remote controller, can receive programme information and storage automatically that transmitting station sends, by the operation of keyboard matrix, can realize a series of built-in functions and external function.Built-in function comprises the display program list, shows current program information, setting and demonstration " TV station-channel " corresponding lists etc.External function comprise transfer platform, change platform, regulate volume, (external function will be sent by infrared launcher and instruct and information, realizes under the cooperation of machine inner control circuit) such as contrasts, default program, setting " personal like " column, setting " advertisement shielding ".Rely on these functions and according to the demonstration of remote controller LCD screen, the user can inquire about and select TV station and the TV programme oneself liked, need not change platform more blindly repeatedly to seek the TV programme that need watch.The user can also set default program and personal like's information according to the needs of oneself, makes television set at the preset time Auto Power On or automatically switch to predetermined channel.All these all greatly facilitate vast TV user.
Description of drawings
Fig. 1 is the control block diagram of existing TV remote controller;
Fig. 2 is existing television set machine inner control part block diagram;
Fig. 3 is a control of remote controller block diagram of the present invention;
Fig. 4 is a machine inner control part block diagram of the present invention;
Fig. 5 is the structure chart of transmitting station emission information;
Fig. 6 is the data structure schematic diagram in the memory I;
Fig. 7 is the data structure schematic diagram in the memory I I;
Fig. 8 is the reception and the Stored Procedure figure of information;
Fig. 9 revises the programme functional flow diagram automatically;
Figure 10 calibrates the time clock feature flow chart automatically;
Figure 11 is for moving the platform functional flow diagram certainly according to selected TV station;
Figure 12 is a television station channel query function flow chart;
Figure 13 is for showing the current program of watching, channel, TV station's informational function flow chart;
Figure 14 is the program chosen in advance, then Auto Power On, automatic switching function flow chart;
Figure 15 is advertisement function of shielding realization flow figure.
Embodiment
As shown in Figure 1 and Figure 2, the control section of existing television set mainly is made up of remote controller and machine inner control two parts, the user is from keyboard matrix input command (change platform, regulate volume etc.), these orders are converted into binary code in command encoder, code is modulated through symbol modulator, by infrared launcher output, realize remote control to TV.The signal that is sent by remote controller sends to CPUII through receiver of remote-control sytem, if change the platform signal, CPUII just reads the frequency range and the wave band voltage of selected channel from program memory, output to the wave band decoder, through the effect of varactor tuner, the TV signal of selected channel is exported again.If other signal, CPUII will signal to function control circuit, realize the adjusting of function.
Remote controller of the present invention has been set up radio receiver, CPUI, memory I, clock circuit and LCDs on the prior art basis, store TV guide information and other new content that is received by radio receiver in the memory I.Order by the keyboard matrix input is sent instruction through command encoder to CPUI, realizes a series of built-in functions and external function.Built-in function comprises the display program list, shows current program information, sets, shows " TV station-channel " corresponding lists etc.External function comprise transfer platform, change platform, regulate volume, (external function will be sent by infrared launcher and instruct and information, realizes under the cooperation of machine inner control circuit) such as contrasts, default program, setting " personal like " column, setting " advertisement shielding ".The initiate clock control circuit of machine inner control part is used for providing the reference time to CPUII, and in addition, storage organization and the content of memory I I also improve to some extent, and cooperates CPUII with better function to realize purpose of the present invention.
How describe each function of the present invention below in detail realizes:
At first, we have a look the structure (transmitting station can be set up by telecommunication department, also can be set up by other service provider, for convenience of description, below all is assumed to telecommunication department) of the information that transmitting station as shown in Figure 5 sends:
The information of being sent by telecommunication department has three kinds: information and clock alignment information are revised in programme information, programme.
● programme information:
Comprise automatic storage operation sign indicating number (in order to realize automatic memory function) and programme information to programme information, and the latter is the program calendar of each TV station, corresponding each TV station, comprise TV station's code (in order to storage that TV station is classified), TV station's title, programme content (, information such as date, program broadcasting time, programm name should be arranged) by seven days weeks classification.
● information is revised in programme:
Comprise automatic retouching operation sign indicating number (in order to realize the automatic modify feature to programme information, default program and " personal like " column) and the programme content of revising, the latter comprises TV station's code, changes information such as preceding time and correction time.
● clock alignment information:
Comprise clock alignment command code (in order to realize automatic calibration function) and current correct time to remote controller and clock-inside.
Key data structure in memory I and the memory I I is respectively as Fig. 6, shown in Figure 7:
The memory I content stored comprises: current program channel, channel information, programme information, pre-current program channel, channel information, programme information, default programme information and " personal like " information.
● current program channel:
Store the channel of current program, realize showing current function of watching the information (comprising programm name, channel, TV station) of program in order to cooperate.By judging the morning and evening of changing the time started (or " personal like " part pointer indication column time started) of default programme information stack top program in time that the platform signal sends and the current storage for the last time, we can obtain the channel information of current program.
● channel information:
What store here is the code listing of the corresponding TV station of each channel, and this tabulation is transferring platform setting contents of channel-TV station to seasonable acquisition and storage for the first time.
● programme information:
This part storage be to be each programme information of preface with TV station's code, each TV station comprises that TV station's code, TV station's title and programme content (store with stack architecture, arrange in chronological order, stack top is the TV program information of this platform of current time).
● default programme information:
The predefined programme information of storage user (is stored with stack architecture, arrange in chronological order, stack top is current or the present nearest default programme information of distance, comprise channel, broadcast date, program start time and program end time, program end time i.e. the time started of this next program).
● " personal like " column information:
Personal like's the rendition list that the storage user sets is (according to round-robin queue's structure storage, with time is preface, current or present nearest " personal like " column information of distance of pointed, storage of channel, broadcast date, broadcast frequency, program start time and program end time).
Content in the memory I I comprises: each channel frequency range, wave band voltage tabulation (being equivalent to the program memory in the original television set), default programme information (same memory I) (is compared with " personal like " information in the memory I with " personal like " column information, increased an advertisement shielding pointer, the advertisement mask information of pointed correspondence), reach the advertisement mask information.
● the advertisement mask information:
The advertising message of corresponding " personal like " column of storage comprises that advertisement begins parameters (hereinafter will introduce in detail) such as relative time (with respect to program start time), advertisement duration.
Below, we specify the realization details of some specific functions.
● the reception of wireless signal and automatic memory function: (as shown in Figure 8)
Radio receiver in the remote controller receives by telecommunication department and sends programme information, directly automatic storage operation sign indicating number is issued CPUI, thereby automatically programme is stored in the memory I.
● revise programme and default program or " personal like " column function automatically: (as shown in Figure 9)
After radio receiver in the remote controller is received the automatic modification programme information of being sent by telecommunication department, send automatic modification programme command code and revise the interior programme information of memory I automatically, then, CPUI partly retrieves to default programme information and " personal like " column of memory I, whether the program of query modification is default program and personal like's program, if not, EP (end of program), if, pre-if " personal like " information in the memory I will be revised automatically, and partly send signal and the modification information revised to the machine inner control, revise the corresponding information in the memory I I.
● calibrate time clock feature automatically: (as shown in figure 10)
After radio receiver in the remote controller is received the automatic modification programme information of being sent by telecommunication department, send automatic alignment time command code, remote controller and clock-inside are changed to the reference time of sending.
● according to selected TV station (program), move the platform function certainly: (as shown in figure 11)
After the selected TV station's (program) of user, CPUI finds the corresponding channel of this TV station (program) in memory I, send then and change the platform order to symbol modulator, and channel information is issued machine inner control part, realizes from moving the platform function.Notice that if selected certain program, then having only this program is stack top program (promptly broadcasting), just carry out and change the platform operation, just otherwise it is made as default program.
● TV station-channel query function: (as shown in figure 12)
Two kinds of query patterns are provided, and the channel that the user can sequential query TV station correspondence also can be selected channel, inquires about corresponding TV station.When using by TV station's inquiry channel functions, CPUI is shown by title, channel that TV station's code order is read each successively from the programme information of memory I; When using by channel query TV station function, CPUI reads the code of each from the channel information of memory I, reads title respectively again from programme information, channel is shown.
● show the current programme information of watching, carry out laterally (each current program) and vertically (program below this TV station) query function: (as shown in figure 13)
CPUI reads the channel of current program from memory I, find TV station's code of this channel correspondence then from channel information according to this channel, reads relevant information according to TV station's code from programme information again and shows in real time at remote controller.Simultaneously, can carry out horizontal and vertical inquiry.If laterally inquire about, the programme information that CPUI will read current other stack top in the memory I is shown; If vertically inquire about, the programme information that CPUI will read in memory I below this is shown.
● the program chosen in advance, to time Auto Power On, automatic switching function: (as shown in figure 14)
If when inquiry, selected a program At All Other Times from remote controller, CPUI will read this programme information and (comprise channel from memory I, date, time started, concluding time) and be stored in default program part, simultaneously partly send information to the machine inner control, with this information storage in the default program part of memory I I, cooperate be implemented in selected program and begin before, automatically switch to program place channel functions and (promptly read the program channel of default program part stack top, then with the frequency range of this channel, wave band voltage is issued wave band decoding, realizes from moving platform).In switching preceding two minutes, should provide on the video screen information (as " switching to after two minutes ... channel? " and provide three options " execution ", and " this program finishes the back to be carried out ", " not switching " selected for the user, and default value is an option one.Certainly, also can be set at do not show), simultaneously, demonstrate the information such as channel, title, time started of title, channel, concluding time and the next program of current program on the remote controller, and it is selective to provide information.If default program broadcasting time near, and TV is not also opened, CPUII will broadcast at program and send starting-up signal in preceding two minutes and (should have a flag bit to represent whether TV is being opened in the buffer of CPUII, in order to avoid starting-up signal has closed TV on the contrary), turn on TV, and switch to corresponding channel.
● set " personal like " column:
Similar with default program, just more emphasize the periodicity of column, need storage column purpose frequency (as, " every day ", " on every Thursdays " etc., certainly, these frequency information can be represented with certain code).When every column begins soon, realize Auto Power On, automatic switching function equally.
● realize " advertisement shielding " function: (as shown in figure 15)
Since the advertisement in serial, intercutted have broadcast time fix, characteristics such as length is fixing, so, (program need be made as " personal like ") during first the setting, when advertisement begins, press remote controller and send signal, signal is sent in advertisement once more when finishing, memory I I will begin to note to the time that advertisement begins and the perdurabgility of advertisement from program.When broadcasting here later on, will show the blue screen information automatically or switch to other " hobby platform " program that after the advertisement, switchback is former automatically, to reach the shielding advertising effect.
Claims (10)
1, a kind of intelligent TV receiving system, comprise remote controller and television set, remote controller comprises keyboard matrix, command encoder, symbol modulator and infrared launcher, the keyboard matrix input command, these orders are converted into binary code in command encoder, code is modulated through symbol modulator, export by infrared launcher, realization is to the remote control of TV, the machine inner control of television set partly comprises receiver of remote-control sytem, memory I I, CPUII, the wave band decoder, TV signal receiver, varactor tuner and video picture output device, the signal that is sent by remote controller sends to CPUII through receiver of remote-control sytem, if change the platform signal, CPUII just reads the frequency range and the wave band voltage of selected channel from memory I I, output to the wave band decoder, again through the effect of varactor tuner, TV signal output with selected channel, if other signal, CPUII will signal to function control circuit, realize the adjusting of function, it is characterized in that, remote controller also comprises radio receiver, CPUI, memory 1, clock circuit and LCD, radio receiver is used to receive the programme information or the program modification information of each TV station that transmitting station sends, and under the control of CPUI, be stored in the memory I, keyboard matrix by remote controller can be provided with default program and personal like's information and be stored in the memory I I, and default program and personal like's information are received and are stored in the memory I I by receiver of remote-control sytem in the machine by the remote controller emission; Behind the selected station synchronization of user, CPUI finds the channel of this station synchronization correspondence in the memory I, sends then and changes the platform order to symbol modulator, and channel information is issued machine inner control part, realizes from moving the platform function; It is similar with default program to set " personal like " column, just more emphasizes the periodicity of column, needs storage column purpose frequency, when every column begins soon, realizes Auto Power On, automatic switching function equally; If when inquiry, selected a program At All Other Times from remote controller, CPUI will read this programme information from memory I, comprise channel, date, time started, concluding time, and be stored in default program part, simultaneously partly send information to the machine inner control, with this information storage in the default program part of memory I I, cooperate be implemented in selected program and begin before, automatically switch to program place channel functions, promptly read the program channel of default program part stack top, then with the frequency range of this channel, wave band voltage is issued wave band decoding, realizes from moving platform; Before switching, should provide information on the video screen, and provide three options " execution ", " this program finishes the back to be carried out ", " do not switch " for the user and select, also can be set at and not show, simultaneously, demonstrate the information such as channel, title, time started of title, channel, concluding time and the next program of current program on the remote controller, and it is selective to provide information, if default program broadcasting time near, and TV is not also opened, CPUII will send starting-up signal before program broadcasts, turn on TV, and switch to corresponding channel.
2, intelligent TV receiving system as claimed in claim 1 is characterized in that, machine inner control part also is included as the clock circuit that CPUII provides the clock reference signal.
3, intelligent TV receiving system as claimed in claim 1 or 2, it is characterized in that, programme information comprises automatic storage operation sign indicating number and programme information, wherein the storage operation sign indicating number is used for being implemented in the CPUI control interior automatic storage of programme information memory I down automatically, and programme information comprises code, title and the programme content thereof of each TV station.
4, intelligent TV receiving system as claimed in claim 1 or 2 is characterized in that, programme modification information comprises automatic retouching operation sign indicating number and amended programme content, the latter comprises TV station's code, change before time and change information such as back time.
5, intelligent TV receiving system as claimed in claim 1 or 2, it is characterized in that, default programme information is stored with the stack architecture that last in, first out in memory I and memory I I, default programme information comprises channel, broadcasts date, program start time and program end time, and default Pgmtime is to back television set Auto Power On or automatically switch to corresponding channel under the control of CPUII.
6, intelligent TV receiving system as claimed in claim 1 or 2, it is characterized in that, personal like's information is stored according to round-robin queue's structure with the setting-up time order in memory I and memory I I, current or the present nearest personal like's information of distance of pointed, comprise storage of channel, broadcast frequency, program start and end time, personal like's Pgmtime is to back television set Auto Power On or automatically switch to corresponding channel under the control of CPUII.
7, intelligent TV receiving system as claimed in claim 1 or 2 is characterized in that, the information that transmitting station sends also comprises clock alignment information, comprises clock alignment command code and current correct time.
8, intelligent TV receiving system as claimed in claim 1 or 2, it is characterized in that, for the commercial breaks in personal like's program broadcast process, the signal that can utilize remote controller to send when advertisement begins and finish is stored in the time started and the perdurabgility thereof of breaking for commercialsy in the memory I I, later on this program when broadcasting here television set with display reminding information or automatically switch to other hobby program, and the Hui Yuantai that after advertisement, automaticallyes switch, reach the shielding advertising function with this.
9, intelligent TV receiving system as claimed in claim 1 or 2, it is characterized in that, after the selected TV station's (or program) of user, CPUI finds the corresponding channel of this TV station (program) in memory I, send then and change the platform order to symbol modulator, channel information is issued machine inner control part, realize from moving the platform function.
10, intelligent TV receiving system as claimed in claim 1 or 2 is characterized in that, the user can utilize the channel of remote controller sequential query TV station correspondence, or selects the corresponding TV station of channel query.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001066730A CN1138408C (en) | 2000-04-17 | 2000-04-17 | Intelligent TV receiving system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001066730A CN1138408C (en) | 2000-04-17 | 2000-04-17 | Intelligent TV receiving system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1318940A CN1318940A (en) | 2001-10-24 |
| CN1138408C true CN1138408C (en) | 2004-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001066730A Expired - Fee Related CN1138408C (en) | 2000-04-17 | 2000-04-17 | Intelligent TV receiving system |
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| CN (1) | CN1138408C (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1301616C (en) * | 2004-12-20 | 2007-02-21 | 海信集团有限公司 | IR parallel multi-system control integrated platform |
| CN101729825B (en) * | 2009-11-13 | 2012-06-27 | 深圳创维－Rgb电子有限公司 | Method for controlling channel switching, device and electronic device |
| CN102298829A (en) * | 2010-06-23 | 2011-12-28 | 北京华旗随身数码股份有限公司 | Method for searching information of target program by virtue of remote controller |
| CN102892037A (en) * | 2011-07-22 | 2013-01-23 | 中兴通讯股份有限公司 | CMMB (China mobile multimedia broadcasting) terminal receiving method and device |
| CN103379375B (en) * | 2012-05-06 | 2016-06-01 | 深圳市丰巨泰科电子有限公司 | A kind of system controlling transmodulator and automatic switching television advertising |
| CN103369386B (en) * | 2012-05-06 | 2016-08-03 | 杭州探索文化传媒有限公司 | A kind of method and system of the television advertising that automatically switches |
| CN104469509A (en) * | 2013-09-16 | 2015-03-25 | 联想(北京)有限公司 | Information processing method and smart television |
| CN103960902A (en) * | 2014-05-16 | 2014-08-06 | 苏州谊恒印务有限公司 | Multifunctional stool |
| CN104105005A (en) * | 2014-08-05 | 2014-10-15 | 乐视致新电子科技（天津）有限公司 | Intelligent television channel auto-control method and mobile terminal |
| CN105791995A (en) * | 2014-12-26 | 2016-07-20 | 深圳Tcl数字技术有限公司 | Control method, remote terminal and system for starting up display terminal at fixed time |
| WO2016127377A1 (en) * | 2015-02-13 | 2016-08-18 | 王志强 | Method for automatically switching film and tv channels and film and tv channel switching device |
| WO2016127378A1 (en) * | 2015-02-13 | 2016-08-18 | 王志强 | Product characteristic prompting method during channel switching and channel switching device |
-
2000
- 2000-04-17 CN CNB001066730A patent/CN1138408C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1318940A (en) | 2001-10-24 |
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