CN1315036C - Portable equipment video switching equipment and switching method thereof - Google Patents
Portable equipment video switching equipment and switching method thereof Download PDFInfo
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- CN1315036C CN1315036C CNB2004100429403A CN200410042940A CN1315036C CN 1315036 C CN1315036 C CN 1315036C CN B2004100429403 A CNB2004100429403 A CN B2004100429403A CN 200410042940 A CN200410042940 A CN 200410042940A CN 1315036 C CN1315036 C CN 1315036C
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Abstract
The present invention discloses a video transfer device for portable devices. The present invention comprises an external connection video detection unit, a video signal converting unit and a video output unit, wherein the external connection video detection unit and the video signal converting unit are respectively connected with the video output unit, the external connection video detection unit is used for detecting whether a portable device is connected with a large screen display device or not, the converting unit receives a data flow from the portable device, and the data flow is output to the video output unit after being converted and is output to the large screen display device. The video transfer device and a transfer method for portable devices provided by the present invention realizes the connection of portable devices, such as portable computers, MP3s, MDs, PDAs, etc., and large screen display devices which support VGA and AV, such as televisions, projectors, etc., and large screen display can be carried out. The present invention realizes the monitoring function of external connection devices by the external connection video detection unit, and energy consumption is lowered maximally. Portable devices can be controlled more conveniently by universal remote control boards, such as compatible universal televisions, DVD players, etc.
Description
Technical field
The present invention relates to a kind of video adapting device and forwarding method of portable set, especially a kind of switching device and forwarding method of large screen display devices such as portable sets such as portable computer and TV being carried out video adapting with monitoring function.Belong to computing machine and external unit field thereof.
Background technology
Along with the appearance of the widespread use of digital technology and high capacity, small size memory device, increasing function is integrated in the portable set such as portable computer.Comprise that the mass data of multimedia and data all use portable sets such as portable computer to store and check.
Portable sets such as these portable computers, for easy to carry, display screen is all very little.During actual the use, particularly at displaying video with when checking image file, effect is good not as good as large screen display device.Particularly in some cases, need show, when playing video files such as video recording in the computer, animation, checking image file such as the process flow diagram that is stored in the computer, design sketch,, almost can't carry out because display screen is too little to the public.Though and obtain easily as large screen display devices such as TVs, but can't be easily large screen display devices such as portable computer portable set and TV be connected, do not reach the purpose of large screen display.
Summary of the invention
At above demand, solve large screen display devices such as portable set such as portable computer and TV and make things convenient for the problem that is connected, the present invention proposes a kind of video adapting device of portable set, can easily portable computer be connected with large screen display devices such as TV, projector with portable sets such as PDA, carry out large screen display; Portable set video adapting device of the present invention has also been taked surveillance and control measure, cuts down the consumption of energy; Control for convenience, also increased function with universal remote control plate compatibilities such as general TV, video disc players.
In order better to finish goal of the invention, the invention allows for the forwarding method of a kind of portable set and large screen display device.
The objective of the invention is to realize by technical scheme as described below.
A kind of video adapting device of portable set comprises: external video detection unit, vision signal converting unit and video output unit;
External video detection unit links to each other with video output unit, the output interface that is used for connecting large screen display device by video output unit obtains the information that whether has large-screen display equipment, the vision signal converting unit links to each other with video output unit, and the data stream after the conversion is sent to video output unit;
External video unit is provided with the interface that is connected to portable set, is used for sending the information that whether has large screen display device to portable set;
The vision signal converting unit is provided with the command interface that is connected to portable set, is used for receiving various control commands and the video interface that is connected to portable set from portable set, is used for receiving the data stream that will play from portable set.
The video adapting device of aforesaid portable set, described external video detection unit comprises a voltage comparable chip at least, an input end of voltage comparable chip links to each other with the output interface of video output unit, another links to each other with the input end normal voltage, by voltage the comparable chip relatively voltage and the normal voltage of video output interface, be used for judging whether to be connected to large screen display device; The output of voltage comparable chip is connected to portable set.
The video adapting device of aforesaid portable set, described external video detection unit comprises electric-controlled switch, electric-controlled switch is serially connected between external video detection unit and the video output unit, control being connected of external video detection unit and video output unit, the control end of electric-controlled switch is connected with portable set.
The video adapting device of aforesaid portable set, described vision signal converting unit comprises the vision signal conversion chip, the video inputs of vision signal conversion chip links to each other with the video output terminals of portable set; The control end of vision signal conversion chip links to each other with portable set.
The video adapting device of aforesaid portable set, described video output unit comprises impedance matching circuit and filtering circuit at least, pass through impedance matching circuit and filtering circuit successively from the data stream of vision signal converting unit input, output to the large screen display device interface;
The video adapting device of aforesaid portable set also comprises infrared receiver, and infrared receiver comprises infrared decoding chip, infrared signal receiver; Infrared signal receiver receives the infrared signal that telepilot sends, and sends to infrared decoding chip after infrared signal is changed into electric signal, and infrared decoding chip sends to portable set after with the signal decoding of receiving.
Because device is with the disconnection of external connection display equipment or be connected, can cause video output unit port changes in resistance, thereby cause the variation of detection circuit all-in resistance, and that detection circuit voltage is kept constant is constant, so the voltage of video output unit port also has corresponding variation.External probe unit is determined the connection and the disconnection of external display device by comparing video output unit port voltage and normal voltage.
The vision signal converting unit is in the vision signal converting unit and is in most functional unit and closes, simultaneously " dormancy " state of reducing of clock frequency;
When external video detection unit detects when having connected large screen display device, external video detection unit sends to portable set with link information, after portable set is received this information, at first close the electric-controlled switch of external video detection unit, thereby close of the detection of external video detection unit external large screen display device; Order the vision signal converting unit by command interface to " waking up " that portable set sends the work that powers up then, and the configuration information that passes a parameter; The vision signal converting unit powers up, and carries out the parameter setting by the parameter that receives; The vision signal converting unit is automatically from the portable set receiving data stream, and change by the form of appointment and export, signal after the conversion is sent to video output unit, after video output unit process impedance matching and filtering, output to large screen display device and show.In the procedure for displaying, the vision signal converting unit also can receive control command from portable set, finish the video control function.
Order or detect large screen display device disconnection connection when the vision signal converting unit receives " dormancy " from portable set, the vision signal converting unit is cut off the power supply automatically, enters " dormancy " state.Simultaneously, portable set is opened the electric-controlled switch of external video detection unit, makes external video detection unit enter duty, monitors the connection status of external video.
Infrared receiver receives the information that telepilot sends from infrared receiving interface, sends to portable set after changing, and portable set is made response to the order that telepilot sends; Give an order by portable set, the video conversion unit is finished powered up the function of exporting or entering " dormancy ".
A kind of video adapting method of portable set may further comprise the steps:
Whether step 1, the continuous detection in external video detection unit have large screen display device to connect; External video detection unit detects large screen display device and connects, and link information is sent to portable set;
Signal after the step 2 portable set control of video signal conversion unit output conversion is to video output unit;
After step 3, video output unit are handled signal, output to large screen display device and show.
The video adapting method of portable set as mentioned above, the concrete course of work of external probe unit comprises in the described step 1:
The external probe unit of step 1.1 is surveyed the interface voltage that video output unit connects large screen display device;
Step 1.2 compares by the voltage comparable chip with predefined normal voltage,
Step 1.3 sends to portable set when the voltage of video output interface during less than normal voltage with link information;
Step 1.4 continues execution in step 1.1 when the voltage of video output interface during more than or equal to normal voltage.
Because device is with the disconnection of external connection display equipment or be connected, can cause video output unit port changes in resistance, thereby cause the variation of detection circuit all-in resistance, and that detection circuit voltage is kept constant is constant, so the voltage of video output unit port also has corresponding variation.By this principle, realize detection to external large screen display device.
Also comprise step 1.5 after the video adapting method of portable set as mentioned above, step 1.4 described in the described step 1: portable set cuts out external video detection unit.
The video adapting method of portable set as mentioned above, the concrete course of work of vision signal converting unit comprises in the described step 2:
Step 2.1 portable set sends " waking up " order and the parameter setting information of the work that powers up to the vision signal converting unit;
Step 2.2 vision signal converting unit powers up, and carries out the parameter setting by the parameter that receives;
Step 2.3 vision signal converting unit is automatically from the portable set receiving data stream, and the form of changing by appointment outputs to video output unit.
The video adapting method of portable set as mentioned above, in the described step 2 in the step 2.3: the vision signal converting unit is in the converting data streams process, and the vision signal converting unit receives control command from portable set, finish video format conversion.
The video adapting method of portable set as mentioned above, the concrete course of work of video output unit comprises in the described step 3:
Step 3.1 video output unit carries out impedance matching to the vision signal after changing;
The signal of step 3.2 video output unit after to impedance matching carries out filtering;
Step 3.3 video output unit is to process impedance matching and filtered signal, and the large screen display device that outputs to connection shows.
The video adapting method of portable set as mentioned above, step 3.1 video output unit carries out impedance matching described in the described step 3, and the matched impedance size is 75ohms usually.
The video adapting method of portable set also comprises step 4 after the described step 3 as mentioned above, and is specific as follows:
Step 4.1 vision signal converting unit receives " dormancy " order from portable set, or detects large screen display device and disconnect to connect, execution in step 4.2 otherwise continue execution in step 1;
Step 4.2 vision signal converting unit is cut off the power supply automatically, enters " dormancy " state; Execution in step 1.
" dormancy " mentioned is meant that most functional unit (unit relevant with video conversion: as DAC) closes, simultaneously the state that reduces of clock frequency.
The video adapting method of portable set as mentioned above, comprise also between described step 1 and the step 2 that portable set cuts out external video detection unit, also comprise step 5 after the step 4: portable set is opened external video detection unit, make external video detection unit enter duty, monitor the connection status of external video.
Also comprise steps A before the video adapting method of portable set as mentioned above, described step 1: infrared receiver receives the power-on command that telepilot sends, and sends to portable set after the decoding; After portable set is received signal, Auto Power On, output video data stream.
The video adapting method of portable set as mentioned above before the described step 4, also comprises step B after the step 3: infrared receiver receives " dormancy " order that telepilot sends, and sends to portable set after the decoding; After portable set is received signal, the video conversion unit is sent the bus line command of " dormancy ".
The video adapting device and the forwarding method of the portable set that the present invention proposes have realized that portable sets such as portable computer, MP3, MD and PDA are connected with the large screen display device of support VGA, AV such as TV, projector, carry out large screen display; Also can adopt same apparatus and method, portable set is connected with various stereo sets, play sound.The present invention has realized the monitoring function of external equipment by external video detection unit, has reduced energy consumption to greatest extent; Universal remote control plates such as the TV by compatible universal, video disc player make control more convenient.
The video adapting device of the portable set that the present invention proposes promptly can place portable set inside, also can place outside the portable set as its PnP device, and volume is little, and is easy to carry.
Description of drawings
Fig. 1 is the functional-block diagram of the embodiment of the invention 1.
Fig. 2 is the circuit diagram of embodiments of the invention 1 external video detection unit, vision signal converting unit and video output unit.
Fig. 3 is the circuit diagram of the infrared receiver of embodiments of the invention 1.
Fig. 4 is the process flow diagram of the embodiment of the invention 2.
Fig. 5 is the external probe unit workflow diagram of the embodiment of the invention.
Fig. 6 is the video conversion cell operation process flow diagram of the embodiment of the invention.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is described in detail.
Embodiment 1 (device):
Fig. 1 has provided present embodiment device circuit functional-block diagram, and Fig. 2 has provided a concrete circuit diagram.From Fig. 1 and Fig. 2 as can be seen, present embodiment comprises: external video detection unit, vision signal converting unit and video output unit;
Shown in Fig. 2 was upper right, external video detection unit comprised two S-809 voltage comparable chip, is used for carrying out the comparison of video output unit S-VIDEO and AV port voltage and normal voltage respectively, determines the connection and the disconnection of outside large-screen display equipment.This be because device with the disconnection of external connection display equipment or be connected, can cause video output unit port changes in resistance, thereby cause the variation of detection circuit all-in resistance, and that detection circuit voltage is kept constant is constant, so the voltage of video output unit port also has corresponding variation.
Upper right middle VPWR_EN of external video detection unit Fig. 2 connects portable set, and when VPWR_EN was low level, electric-controlled switch was closed, and formation is opened circuit; When VPWR_EN was high level, electric-controlled switch was opened, and formed path, and the connection status of video output unit and external connection display equipment can effectively be surveyed in external video detection unit.So just can control the opening and closing of external video detection unit.
External video detection unit links to each other with video output unit with P_C by upper right middle P_CVBS of Fig. 2, obtain the information that whether has external equipment, external video unit comprises that also an INT_V interface is connected to portable set, sends the information that whether has external equipment to portable set.
As shown in Fig. 2 left side, what the vision signal converting unit was selected for use is the conversion that the CH7013A chip is finished vision signal.The CVBS pin of vision signal conversion chip links to each other with P_C with the P_CVBS of video output unit with the C pin, data stream after the conversion is sent to video output unit, the vision signal converting unit also comprises: a control command bus interface that is connected to portable set, shown in Fig. 2 lower-left; Be used for receiving various command signals and a video signal bus interface that is connected to portable set, shown in upper left among Fig. 2, be used for receiving the data stream that to play from portable set from portable set.
Video output unit comprises two interfaces for external devices, and S-VIDEO interface and AV (PAL) interface is a bottom right piece COMPOSITE VIDEO interface among Fig. 2, is used for connecting large screen display device.In Fig. 2, in the piece of bottom right, from left to right, be followed successively by impedance matching circuit, filtering circuit and output interface.
When external video detection unit detects when having connected large screen display device, external video detection unit INT_V becomes high level output by low level, after portable set is received this information, at first close the electric-controlled switch of external video detection unit by VPWR_EN, thus the detecting function of closing external video detection unit; Send to vision signal conversion chip CH7013A by the control command bus then and power up the order of work, and the configuration information that passes a parameter; The vision signal conversion chip powers up, and carries out the parameter setting by the parameter that receives; The vision signal conversion chip passes through video signal bus automatically from the portable set receiving data stream, and change by the form of appointment and export, signal after the conversion is sent to video output unit, after video output unit process impedance matching and filtering, output to large screen display device and show.In the procedure for displaying, the vision signal converting unit also can receive control command from portable set, finish the function of video format conversion.
In the course of work of vision signal converting unit, portable set can initiatively send " dormancy " order, also can " dormancy " order after detecting large screen display device to disconnect connection.Portable set regularly reads the register of expression connection status in the video conversion chip by bus, detect the connection status of outside large screen display device with this.When portable set reads the value of " do not have and connect ", send out " dormancy " instruction and give the video conversion unit, make it enter dormant state.
Order when the vision signal converting unit receives " dormancy " from portable set, the vision signal converting unit is cut off the power supply automatically, enters " dormancy " state.Simultaneously, portable set is opened the electric-controlled switch of external video detection unit, makes external video detection unit enter duty, monitors the connection status of external video.
Infrared receiver comprises infrared decoding chip, infrared signal receiver; Infrared signal receiver receives the infrared signal that telepilot sends, and sends to infrared decoding chip after infrared signal is changed into electric signal, and infrared decoding chip sends to portable set after with the signal decoding of receiving.What as shown in Figure 3, infrared receiver was selected is the IRDC370BM decoding chip.The instruction of infrared remote control plate is introduced by the P_RXIN pin, decodes by this unit and is sent to portable set by P_IROUT and P_PWRCRL, and portable set is finished the appointed function of start or " dormancy " according to the instruction that receives.
Embodiment 2 (method):
As shown in Figure 4, present embodiment may further comprise the steps:
Steps A, portable set receive the infrared receiver power-on command and start portable set operate as normal, output video data stream.At this moment, the vision signal converting unit is in the vision signal converting unit and is in most functional unit (unit relevant with video conversion: as DAC) and closes, simultaneously " dormancy " state of reducing of clock frequency;
Step 2 is in conjunction with Fig. 6, and portable set sends " waking up " order and the parameter setting information of the work that powers up to the vision signal converting unit; The vision signal converting unit powers up, and carries out the parameter setting by the parameter that receives; The vision signal converting unit automatically by video signal bus from the portable set receiving data stream, and change by the form of appointment, output to video output unit then; In the procedure for displaying, the vision signal converting unit receives control command by the control command bus from portable set, if receive " dormancy " order, forwards step 5 to; If receive the format conversion order, adjust the output format of video according to order;
Step 3 video output unit carries out impedance matching and Filtering Processing to signal, and the fundamental purpose of filtering is to reduce the influence of noise to outputting video signal, outputs to large screen display device then and shows;
Step 4 portable set receives the order that infrared receiver makes the vision signal converting unit enter " dormancy " and is transmitted to the vision signal converting unit, and the outage of vision signal converting unit enters " dormancy " state;
Disconnect connection if step 5 vision signal converting unit detects large screen display device, the vision signal converting unit is cut off the power supply automatically, enters " dormancy " state;
Step 6 portable set is opened the electric-controlled switch of external video detection unit, makes external video detection unit enter duty, monitors the connection status of external video.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (17)
1, a kind of video adapting device of portable set is characterized in that: comprising: external video detection unit, vision signal converting unit and video output unit; Wherein,
External video detection unit links to each other with video output unit, and the output interface that is used for connecting large screen display device by video output unit obtains the information that whether has large-screen display equipment; The vision signal converting unit links to each other with video output unit, and the data stream after the conversion is sent to video output unit;
External video detection unit is provided with the interface that is connected to portable set, is used for sending the information that whether has large screen display device to portable set;
The vision signal converting unit is provided with control command interface and the video interface that is connected to portable set; The control command interface is used for receiving various control commands from portable set; Video interface is used for wanting data converted stream from the portable set reception;
Described external video detection unit comprises a voltage comparable chip at least, an input end of voltage comparable chip links to each other with the output interface of video output unit, another input end links to each other with normal voltage, by the voltage comparable chip relatively the voltage of video output interface judge whether to be connected to large screen display device whether less than normal voltage; The output of voltage comparable chip is connected to portable set.
2, the video adapting device of portable set according to claim 1, it is characterized in that: described external video detection unit comprises electric-controlled switch, electric-controlled switch is serially connected between external video detection unit and the video output unit, control being connected of external video detection unit and video output unit, the control end of electric-controlled switch is connected with portable set.
3, the video adapting device of portable set according to claim 1, it is characterized in that: described vision signal converting unit comprises the vision signal conversion chip, the video inputs of vision signal conversion chip links to each other with the video output terminals of portable set, is used for receiving wanting data converted to flow; The control end of vision signal conversion chip links to each other with portable set, is used for receiving the control command that portable set sends.
4, the video adapting device of portable set according to claim 1, it is characterized in that: described video output unit comprises impedance matching circuit and filtering circuit at least, pass through impedance matching circuit and filtering circuit successively from the data stream of vision signal converting unit input, output to the large screen display device interface.
5, the video adapting device of portable set according to claim 4 is characterized in that: the impedance matching optimum value of described video output unit is 75ohms.
6, the video adapting device of portable set according to claim 1 is characterized in that: the vision signal of described video output unit output comprises: two kinds of outputs of S-Video, AV.
7, the video adapting device of portable set according to claim 1 is characterized in that: comprise that also infrared receiver, infrared receiver comprise infrared decoding chip and infrared signal receiver; Infrared signal receiver receives the infrared signal that telepilot sends, and sends to infrared decoding chip after infrared signal is changed into electric signal, and infrared decoding chip sends to portable set after with the signal decoding of receiving.
8, a kind of video adapting method of portable set is characterized in that: carry out video adapting in the arbitrary device in claim 1-7, may further comprise the steps:
Whether step 1, the continuous detection in external video detection unit have large screen display device to connect; When external video detection unit has detected the large screen display device connection, link information is sent to portable set, the concrete course of work comprises:
The external probe unit of step 1.1 is surveyed the interface voltage that video output unit connects large screen display device;
Step 1.2 compares by the voltage comparable chip with predefined normal voltage;
Step 1.3 sends to portable set when the voltage of video output interface during less than normal voltage with link information, and execution in step two then; When the voltage of video output interface during, continue execution in step 1.1 more than or equal to normal voltage;
Signal after step 2, the portable set control of video signal conversion unit output conversion is to video output unit;
After step 3, video output unit are handled signal, output to large screen display device and show.
9, the video adapting method of portable set according to claim 8 is characterized in that: also comprise step 1.4, the external video detection of promptly portable device shutdown unit after the step 1.3 described in the described step 1.
10, the video adapting method of portable set according to claim 8 is characterized in that: the concrete course of work of vision signal converting unit comprises in the described step 2:
Step 2.1 portable set sends " waking up " order and the parameter setting information of the work that powers up to the vision signal converting unit;
Step 2.2 vision signal converting unit powers up, and carries out the parameter setting by the parameter that receives;
Step 2.3 vision signal converting unit is automatically from the portable set receiving data stream, and changes by the form of appointment, outputs to video output unit.
11, the video adapting method of portable set according to claim 10, it is characterized in that: in the described step 2 in the step 2.3, the vision signal converting unit is in the converting data streams process, and the vision signal converting unit receives control command from portable set, finish video format conversion.
12, the video adapting method of portable set according to claim 8 is characterized in that: the concrete course of work of video output unit comprises in the described step 3:
Step 3.1 video output unit carries out impedance matching to the vision signal after changing;
The signal of step 3.2 video output unit after to impedance matching carries out filtering;
Step 3.3 video output unit will output to the large screen display device that is connected through impedance matching and filtered signal and show.
13, the video adapting method of portable set according to claim 12 is characterized in that: step 3.1 video output unit carries out impedance matching described in the described step 3, and the optimum value of matched impedance is 75ohms.
14, the video adapting method of portable set according to claim 8 is characterized in that: also comprise step 4 after the described step 3, specific as follows:
Step 4.1 vision signal converting unit receives " dormancy " order from portable set, or detects large screen display device disconnection connection, execution in step 4.2; Otherwise continue execution in step one;
Step 4.2 vision signal converting unit is cut off the power supply automatically, enters " dormancy " state, execution in step one.
15, the video adapting method of portable set according to claim 14, it is characterized in that: comprise between described step 1 and the step 2 that portable set cuts out external video detection unit, also comprise step 5 after the described step 4, be that portable set is opened external video detection unit, make external video detection unit enter duty, monitor the connection status of external video.
16, the video adapting method of portable set according to claim 8 is characterized in that: also comprise steps A before the described step 1: infrared receiver receives the power-on command that telepilot sends, and sends to portable set after the decoding; After portable set is received signal, Auto Power On, output video data stream.
17, the video adapting method of portable set according to claim 14, it is characterized in that: before the described step 4, also comprise step B after the step 3: infrared receiver receives " dormancy " order that telepilot sends, and sends to portable set after the decoding; After portable set is received signal, the video conversion unit is sent the bus line command of " dormancy ".
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| CNB2004100429403A CN1315036C (en) | 2004-06-01 | 2004-06-01 | Portable equipment video switching equipment and switching method thereof |
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| CNB2004100429403A CN1315036C (en) | 2004-06-01 | 2004-06-01 | Portable equipment video switching equipment and switching method thereof |
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| CN1315036C true CN1315036C (en) | 2007-05-09 |
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| US8427392B2 (en) | 2009-03-31 | 2013-04-23 | Asustek Computer Inc. | Circuit for detecting an external display device adapted to notebook computer and detecting method thereof |
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| CN100490516C (en) * | 2006-01-16 | 2009-05-20 | 深圳创维－Rgb电子有限公司 | Ditial light display rear projection VGA extension circuit |
| CN101064811B (en) * | 2006-04-26 | 2010-05-12 | 明基电通股份有限公司 | Electronic device and method for communicating with external connection module |
| CN101458942B (en) | 2007-12-14 | 2012-07-18 | 鸿富锦精密工业（深圳）有限公司 | Audio video device and controlling method |
| CN102385499A (en) * | 2010-09-03 | 2012-03-21 | 上海信颐信息技术有限公司 | Signal transmission device and combination system of ultra mobile personnel computer and computer monitor |
| TWM508813U (en) * | 2015-06-30 | 2015-09-11 | Aten Int Co Ltd | Signal-transmitted device for energy conservation and a system thereof |
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2004
- 2004-06-01 CN CNB2004100429403A patent/CN1315036C/en not_active Expired - Lifetime
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| US5748238A (en) * | 1992-03-12 | 1998-05-05 | Hitachi, Ltd. | Video camera |
| EP0710017A2 (en) * | 1994-10-28 | 1996-05-01 | Plessey Semiconductors Limited | Television receiver with an interface for the displaying and communication of data |
| EP1059809A2 (en) * | 1999-06-07 | 2000-12-13 | Nokia Corporation | Adaptator for data transfer between a mobile device and a television and method therefore |
| CN1300981A (en) * | 1999-12-22 | 2001-06-27 | 中国科学院电子学研究所 | Microcomputer controlled digital monitor system and method |
| WO2002043389A1 (en) * | 2000-11-27 | 2002-05-30 | Lasse Halttunen | Method of transferring data of screen and voice of mobile phone to a normal analog television receiver with an adapter |
| CN1421763A (en) * | 2001-11-29 | 2003-06-04 | 英业达股份有限公司 | Computer I/O port unit for inserting monitor or TV set |
| CN2565082Y (en) * | 2002-07-05 | 2003-08-06 | 赖俊鹏 | Portable digital picture and sound player |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8427392B2 (en) | 2009-03-31 | 2013-04-23 | Asustek Computer Inc. | Circuit for detecting an external display device adapted to notebook computer and detecting method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1704896A (en) | 2005-12-07 |
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