CN100507825C - Computer image system and processing device - Google Patents
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- CN100507825C CN100507825C CNB2004101021463A CN200410102146A CN100507825C CN 100507825 C CN100507825 C CN 100507825C CN B2004101021463 A CNB2004101021463 A CN B2004101021463A CN 200410102146 A CN200410102146 A CN 200410102146A CN 100507825 C CN100507825 C CN 100507825C
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Abstract
The invention provides a new computer image system architecture. By adding an image processor to receive TV signal input and drive screen when the operation system is not started, TV signal can be received and displayed on the display panel under the condition of not starting up and not starting up the computer operation system. In addition, under the operation of the operation system, partial image processing is selectively returned to CPU or image graphic array operation, so that the computer screen can play TV and be used as common computer.
Description
Technical field
The present invention relates to a kind of display system and device, particularly relate to a kind of display system architecture and device that need not start the operating system and to dial the placing TV signal with the computer screen TV reception.
Background technology
Along with the development of Information technology and the universalness of personal computer, computing machine has become the household appliances articles for use as TV, refrigerator one class, and wherein very most is usefulness as amusement.In addition, put image and sound program except playing games or dialling, TV reception also is that one of computing machine is used greatly, and these application all are to be presented on the screen by image display system.
Desktop PC between display and image display system (as display card to display) by increasing equipment such as a TV interconnecting device or TV capture card, but received television signal is dialled the placing TV program on indicator screen.In addition, but therefore desktop PC display external power supply even computing machine is not started shooting, still can be viewed and admired TV programme.Yet the display system architecture of mobile computer also can't teleview in the above described manner at present.
With reference to Figure 1A, this figure illustrates the framework of traditional notes type computer picture display system.In the computer system, South Bridge chip is responsible for the exchange of CPU (central processing unit) and peripheral data.Be stored in the view data of peripherals 100 such as hard disk, discs, network, by bus input South Bridge chip 102, be responsible for and internal memory 106, CPU (central processing unit) 108 or Video Graphics Array (VideoGraphic Array, VGA) 110 exchanges data by north bridge chips 104.View data is after Video Graphics Array 110, CPU (central processing unit) 108 calculation process, produce low-voltage differential signal (Low Voltage DifferentialSignal, LVDS) drive signal of electric form (all being called low-voltage differential signal later on) drives display panel 112, with display image on screen.
In addition, some mobile computer picture system does not comprise above-mentioned Video Graphics Array device.As Figure 1B, view data is dealt with by south, north bridge chips (100 ', 102 ') input CPU (central processing unit) 108 ', produces low-voltage differential signal by north bridge chips 102 ' and drives display panel.
The system and device of the most common present mobile computer received television signal, be to use the TV interconnecting device of circumscribed, TV data is converted to the picture signal (for example release of an interleave (de-interlacing), YCrCb colour difference level signal are to RGB RGB data-switching) of computer display formats, (Universal Serial Bus USB) enters south, north bridge chips by output/input interface such as universal serial bus after compression.Make signal Processing by Video Graphics Array or CPU (central processing unit) afterwards, drive screen panel to show television image.
Desktop PC is that with the different places of TV interconnecting device that mobile computer uses the former can be connected between indicator screen and display card, directly exports to display screen after the input television image is handled; Latter's screen drives must be by the image display system of computing machine, and by the TV signal of output/input interfaces such as versabus input mobile computer, is the signal of compression back computer picture form, still needs handle through Video Graphics Array.
Know by above-mentioned, though but equipment such as mobile computer external tv interconnecting device to dial the placing TV program, in fact signal processing flow is different fully with desktop PC.In addition, mobile computer must starting up's operating system could drive liquid crystal screen panel.Yet the user only wants to view and admire TV programme in the time of many, does not want to use a computer.And the system architecture of mobile computer must start the operating system computer booting and the screen drive unit at present, could dial the placing TV image, and is very inconvenient in the use.
Summary of the invention
For these reasons, the present invention proposes a kind of computer system architecture, if computer image system comprises Video Graphics Array originally, by increasing by an image processor between display panel and Video Graphics Array, can not start shooting, not start under the situation of computer operating system, received television signal also be presented on the display panel.
The present invention also discloses a kind of computer system architecture, if computer image system does not comprise Video Graphics Array, by increasing by an image processor between display panel and north bridge chips, can not start shooting, not start under the situation of computer operating system, receive and the demonstration TV signal.
In addition, the present invention also discloses the framework of above-mentioned image processor.This image processor can not start the operating system down, receives the television image data and drive display panel to show television image.If start the operating system, changeable different working modes to be showing computer picture data or television image, no matter and whether comprise the Video Graphics Array device.
Above-mentioned image processor comprises at least: an initialization control module, a Date Conversion Unit, a panel driver element, a memory control unit, switch control module, an image compression unit, a data output interface, a data exchange interface and two selection modules.The initialization control module is the actuating section computer installation under starting up's operating system not; Date Conversion Unit can be converted to television image the computer picture display format; The panel driving unit can produce the low-voltage differential signal that drives display panel; Memory control unit control accessing image data, the internal memory required with signal Processing; The present mode of operation of the changeable computing machine of switch control unit shows computing machine or television image data; Image compression unit can be made image Compression, and transmits the compressed images data to output interface, exports other computer installation to.In addition, also can increase by a ROM (read-only memory), store the parameter of different television signals system, to be compatible with different television systems.
Description of drawings
Figure 1A and Figure 1B are respectively and comprise/do not contain the display system architecture figure of the mobile computer of Video Graphics Array device;
Fig. 2 A and Fig. 2 B comprise/do not contain the display system architecture figure of the mobile computer of Video Graphics Array device for what the present invention disclosed;
Fig. 3 is a preferred embodiment of the image processor framework of the present invention's exposure;
Fig. 4 A explanation image processor is applied to comprise the system of image graphics array, at the signal processing flow of shutdown mode;
Fig. 4 B explanation image processor is applied to comprise the system of image graphics array, at the signal processing flow of computer patterns;
Fig. 4 C explanation image processor is applied to comprise the system of image graphics array, at the signal processing flow of television mode;
Fig. 5 is another preferred embodiment of the image processor framework of the present invention's exposure;
Fig. 6 A explanation image processor is applied to not contain the system of image graphics array, at the signal processing flow of shutdown mode;
Fig. 6 B explanation image processor is applied to not contain the system of image graphics array, at the signal processing flow of computer patterns;
Fig. 6 C explanation image processor is applied to not contain the system of image graphics array, at the signal processing flow of television mode; And
Fig. 7 is another preferred embodiment of the image processor framework of the present invention's exposure.
The reference numeral explanation
100,100 ' peripheral unit
102,102 ' South Bridge chip
104,104 ' north bridge chips
106,106 ' internal memory
108,108 ' CPU (central processing unit)
110,110 ' Video Graphics Array
200,200 ' South Bridge chip
202,202 ' north bridge chips
204,204 ' internal memory
206,206 ' CPU (central processing unit)
208 Video Graphics Arrays
210,210 ' display panel
212,212 ' image processor
30 South Bridge chips
31 north bridge chips
33,53 internal memories
34,54 Video Graphics Arrays
36 image processors
38,58 display panels
300,500,700 initialization control modules
302,502,702 Date Conversion Units
304,504,704 panel driving unit
306,506,706 memory control units
308,508,708 switch control units
310,710 image compression unit
312,712 data output interfaces
314,514,714 data exchange interfaces
330,530 first select module
332,532 second select module
350 television image data
352 computer picture data
354 panel driving signals
356 compressing image datas
358 low-voltage differential signals
732 select module
Embodiment
Some embodiments of the present invention can be described in detail as follows.Yet except the content of describing in detail, the present invention can also be widely implements at other embodiment, and scope of the present invention do not limited, its with after claim be as the criterion.
Moreover the system that the present invention discloses, device are only described main the composition, and other is not that chief detail or step should be and be familiar with the related art techniques personage and can fully understand; Do not draw succinct in the hope of accompanying drawing in the accompanying drawing fully yet.
For represent principal character of the present invention brief and concisely, clipped assembly in the accompanying drawing is as TV signal output/input interface, low-voltage differential signal input port etc.In addition, TV signal is to comprise video and audio-frequency unit, and right the present invention is a framework of emphasizing computer picture display system and Flame Image Process, and puts aside audio-frequency unit.If audio-frequency unit will be incorporated in the same device, can increase an AC ' 97 interfaces, make the TV signal audio-frequency unit by this interface output, by South Bridge chip acquisition sound signal, be sent to central processing unit or sound card device and handle.
Fig. 2 A is a kind of framework that comprises the mobile computer picture system of Video Graphics Array (VGA), is to have increased by an image processor between display panel and Video Graphics Array.New system architecture comprises: South Bridge chip 200, north bridge chips 202, internal memory 204, CPU (central processing unit) 206, Video Graphics Array 208, display panel 210 and an image processor 212.Wherein South Bridge chip, north bridge chips, internal memory, CPU (central processing unit), with Video Graphics Array be the core cell of mobile computer, most of data processing is all carried out in this core cell group, comprises the processing of view data.TV signal is by the television image interface, as meets the interface of CCIR 601 or CCIR 656 standards, enters image processor 212.Connection relationship between presentation video data and each device only in graphic, arrow are represented the direction of transfer of the television image data imported.
Said system is except increasing image processor 212, and the power-supply system of mobile computer need adjust, and makes under the situation of not starting shooting can power supply to dial for display panel, sound card etc. to put the required device of image and sound program.Its way for example, can be set up a shift knob, special conduct is not looked on the bright side of things and is not opened mobile computer operating system, and the power switch when wanting to watch TV programme, this button only provides power supply in image processor earlier, afterwards again by image processor to drive other computer installation.
Fig. 2 B then is a kind of framework that does not contain the mobile computer picture system of Video Graphics Array, and the low-voltage differential signal that drives display panel is produced by north bridge chips 202 ', and image processor then places between display panel 210 ' and north bridge chips 202 '.Comparing with Fig. 2 A, is to have lacked Video Graphics Array, and the television image data may be output to South Bridge chip 200 (the television image data are to enter Video Graphics Array among Fig. 2 A), and all the other devices are identical with Fig. 2 A.
Fig. 3 illustrates the framework of image processor, and with the annexation of other display system apparatus.With reference to figure 3, image processor 36 comprises at least: initialization control module 300, Date Conversion Unit 302, panel driving unit 304, memory control unit 306, switch control unit 308, image compression unit 310, data output interface 312, data exchange interface 314, first select module 330, with second select module 332, image processor 36 more is connected to display screen 38 and internal memory 33 in addition.After above-mentioned each device unit can be described in detail in.In addition, more can comprise a ROM (read-only memory) 316, store different television systems (NTSC or PAL etc.) parameter, to be compatible with the TV signal of different system.
Display system and device that the present invention discloses, its mode of operation is divided into: do not start the operating system, start the operating system and make general computing machine and use and start the operating system but teleview three kinds.For convenience of description, respectively with shutdown mode, computer patterns, be referred to as with television mode.During shutdown mode, computer booting is not started the operating system, only supply power is in image processor, and starts other computer installation by image processor, as sound card, internal memory etc.Television image data input picture processor is converted to the signal data that computing machine shows specification, meets the drive signal of the low-voltage differential signal (LVDS) of low-voltage differential signal electrical specification with generation, to drive display panel.At computer patterns, be that image processor is sent to display panel with display image with the low-voltage differential signal bypass (bypass) that Video Graphics Array (or north bridge chips) transmits as the usefulness of general mobile computer at this moment.During as for television mode, computing machine respectively installs control and grasps in operating system, and image processor directly is sent to Video Graphics Array with input TV signal; Or make section processes, and deliver to the Video Graphics Array computing by the north and south bridge chip, produce low-voltage differential signal and drive display panel.
Below illustrate respectively image processor comprise the display system of Video Graphics Array, with do not contain Video Graphics Array display system each the device annexation, with the signal processing flow under above-mentioned three kinds of mode of operations.
Fig. 4 A to Fig. 4 C is display system (as Fig. 2 A) and the image processor that comprises Video Graphics Array, respectively at the signal processing flow of shutdown mode, computer patterns and television mode.Under the shutdown mode, please refer to Fig. 4 A, wherein South Bridge chip, north bridge chips, internal memory, CPU (central processing unit), be in off-mode with Video Graphics Array.Because operating system does not start, each device of mobile computer picture system can't act on.In addition, if will dial the placing TV video-audio signal, still needing starts and supply power is given partial devices (as sound card etc.).When receiving one, mobile computer (for example drives order, can produce by a shift knob of mobile computer, different with the power switch of mobile computer system is, this not start-up function of pushbutton switch system) by entering shutdown mode under the situation of shutting down fully, at first power-supply system (external power supply or built-in battery) supply power is to image processor 36, trigger other computer installation by initialization control module 300 (with ROM (read-only memory) 316) output signal to start, as sound card, internal memory, or keyboard etc., its function class is like the basic input/output (BIOS) in the computer system.
Under the shutdown mode, the television image data of importing through television image interface (CCIR601/656) 350 are sent to the first selection module 330, and export Date Conversion Unit 302 to.Television image is the alternating expression image, after screen display mode is the scanning yoke picture (promptly strange, Odd Field) of output one odd number earlier, export (promptly even of an even-line interlace line image again, Even Field), interactively output, and the also interactive image information of noting down strange, even of view data.In addition, the television image data are to adopt the picture format of YCrCb (YUV) colour difference level signal, and are different with formula in proper order, the RGB redgreenblue image of computer image system.With the alternating expression image transitions is that the process of formula image is called release of an interleave in proper order.The placing TV image to be on computer screen, dialled, the computer/TV image transitions must be made earlier.The function of Date Conversion Unit 302 is television image data 350 to be done processing such as release of an interleave and YCrCb commentaries on classics RGB image, and the picture signal form of conversion television image data 350 obtains computer picture data 352.
Computer graphic similarly is to be the formula in proper order scanning of unit with frame (Frame), and the television image data will produce huge data volume when being converted to the computer picture data.Because human eyes can think that for the image of 30 P-SCANs of per second picture image flashes, and such flash phenomenon just can become not obvious when improving sweep frequency to 60Hz, therefore the computing machine display frequency is many more than 60Hz at present.Television image is to be the interleaved type scanning of unit with the field, and each only contains half data volume of frame.TV signal with U.S. NTSC system is an example, and display frequency is 60 fields of per second output, strange, idol field half and half.Because each resolution (or data volume) only accounts for frame half, the TV signal data amount is equivalent to 30 frames of per second originally.After TV data was converted to the computer picture data, image data amount can increase, and huge data and computing must be temporarily stored in the internal memory earlier.
After 302 pairs of television images of Date Conversion Unit were done computing such as release of an interleave processing, the computer picture data 352 that obtain temporarily were stored in internal memory 33 earlier, or other memory device, and the present invention does not limit, its explanation as after.After the data processing of finishing at least one frame, export display panel 38 again to and show.Therefore, the computer picture data 352 input data exchange interfaces 314 of Date Conversion Unit 302 outputs, the access by memory control unit 306 control datas earlier is temporarily stored in internal memory 33.When internal memory 33 contains the view data of at least one frame, the computer picture data that are stored in the internal memory 33 are imported data exchange interface 314 by memory control unit 306 controls again, are sent to panel driving unit 304.When shutdown mode, Video Graphics Array 34 does not operate, and needs to produce the low-voltage differential signal that drives display panel by this device.Panel driving unit 304 promptly is a kind of panel drive circuit, in order to produce the panel driving signal 354 of the electric form of low-voltage differential signal, drives display panel 38 and shows TV signal.And the second selection module 332 is the output that receives panel driver element 304 when shutdown mode, and is sent to display panel 38.
And at computer patterns, as Fig. 4 B, the display system of embodiment is the usefulness as general mobile computer, power supply and operating system normal operation, and do not need television image data 350 contents are presented on the display panel.In this mode of operation, image processor 36 is as a bypass resistance.34 computings of computer data input video graphic array, the low-voltage differential signal 358 of generation are directly imported second and are selected module 332.Selecting module 332 this moment second is effectively inputs of low-voltage differential signal 358 conducts of receiver, video graphic array 34 outputs, directly exports display panel 38 to.Therefore, image processor 36 only needs second to select module 332 runnings during computer patterns, makes low-voltage differential signal 358 bypass be sent to display panel 38 and gets final product.
Similarly, at television mode, with reference to figure 4C, each device of mobile computer is controlled by operating system.Video Graphics Array 34 normal operation under operating system control, and produce low-voltage differential signal driving display panel.After module 330 is selected in 350 inputs first of television image data, do not import Date Conversion Unit 302, but export Video Graphics Array 34 to, do processing such as release of an interleave and YcrCb/RGB conversion, and produce low-voltage differential signal 358 by Video Graphics Array 34.Low-voltage differential signal 358 input picture processor 36 once more afterwards, and directly be sent to second and select module 332.At this moment, it is effectively input that the second selection module 332 is selected low-voltage differential signals 358, and directly exports display panel 38 to.In other words, image processor 36 is sent to Video Graphics Array 34 with television image data 350 relayings and does TV/computer data conversion during television mode, selects module 332 to be sent to display panel 38 through second afterwards.Attention is under television mode, and image processor 36 only needs first to select module 330 and second to select module 332 runnings to get final product.
According to the above, when shutdown mode, selecting module 330 television image data 350 by first is to export Date Conversion Unit 302 to, is to export Video Graphics Array 34 to during television mode.The second selection module 332 is the output that receives panel driver element 304 when shutdown mode, and exports display panel 38 to; When TV, computer patterns, then be the low-voltage differential signal 358 of selective reception Video Graphics Array 34 outputs.Therefore need a device, control above-mentioned two input, output terminals of selecting module, image processor is switched three operator schemes.The function of switch control unit 308, be when receiving a mode switch order, control first respectively and select module 330 and second to select module 332 to switch its effective output terminal and input ends, and when television mode, forbid (disable) first selection module and television image data 350 are not carried out calculation process.In addition, by under the shutdown fully when entering shutdown mode, switch control unit 308 can trigger control initialization control modules 300 to drive the computer installation of a part at mobile computer.Wherein above-mentioned mode switch order can be to produce by setting up button on keyboard or the display panel.
By showing among Fig. 4 A to Fig. 4 C, in comprising the display system of Video Graphics Array, image compression unit 310 and data output interface 312 are not had a function in the image processor 36.Therefore image processor 36 as Fig. 5, can omit image compression unit 310 and data output interface 312 comprising under the display system architecture of Video Graphics Array, and the first selection module is to be electrically connected to Video Graphics Array 54.
Fig. 6 A to Fig. 6 C is for not containing the display system (as Fig. 2 B) and the image processor of Video Graphics Array, at the signal processing flow of shutdown mode, computer patterns and television mode.Under the shutdown mode, identical with reference to figure 6A with the above-mentioned system that comprises Video Graphics Array, by initialization control module 300 actuating section computer installations.The television image data 350 of input select module 330 to export Date Conversion Unit 302 to by first, the computing of doing decompression, YCrCb/RGB conversion in 302 pairs of television image data of Date Conversion Unit 350 produces computer picture data 352, and is temporarily stored in the internal memory 33 with memory control unit 306 via data exchange interface 314.Then memory control unit 306 reads the computer picture data 352 that are temporarily stored in the internal memory 33, via data exchange interface 314 input panel driver elements 304 and produce the panel driving signal 354 of low-voltage differential signal, select module 332 to export display panel 38 to by second afterwards, to show TV signal.
Similarly, with reference to figure 6B, image processor 36 is as bypass resistance during computer patterns.CPU (central processing unit) to the computer picture data operation after, produce low-voltage differential signals 358 to drive display panel 38 by north bridge chips 31.Low-voltage differential signal 358 is directly inputted into second and selects module 332, selects this moment second module 352 to select low-voltage differential signal 358 as effectively input, and exports display panel 38 to.
Under the television mode, with reference to figure 6C, because mobile computer does not contain the Video Graphics Array device, this moment, TV/the computer data conversion must be in Date Conversion Unit 302 processing.Module 330 is selected in 350 inputs first of television image data, selects to export to Date Conversion Unit 302 and does TV/computer data conversion.The computer picture data 352 input data exchange interfaces 314 of Date Conversion Unit 302 outputs, the access by memory control unit 306 control datas earlier is temporarily stored in internal memory 33.Because of display panel 38 is driven by the low-voltage differential signal 358 that north bridge chips 31 produces, computer picture data after the conversion are not to be to be sent to panel driving unit 304 producing the panel driving signal shown in (with reference to figure 4A) during as shutdown mode, and after need passing north bridge chips 31 calculation process back the output low-voltage differential signal to drive display panel 38.By learning before, the television image data are converted to the huge data volume that the computer picture data can increase, so central processing unit is read and imported in computer graphic image signal 352 need compression backs through South Bridge chip 30 again by data output interface output.Therefore, computer picture data 352 are done data compressions through data exchange interface 314 input picture compression units 310, for example adopt discrete cosine transform (Discrete CosineTransform, technology DCT), and obtain a compressing image signal 356.Pass South Bridge chip 30 back by data output interface 312 outputs more afterwards.Data output interface 312 is to be universal serial bus (USB) interface in the present embodiment, also can be replaced by other I/O interface, and the present invention does not limit.
Among Fig. 6 C, after South Bridge chip 30 receives the compressing image signal 356 of data output interface 312 outputs, again via north bridge chips 31 input central processing unit calculation process, again by north bridge chips 31 produce low-voltage differential signals 358 and once more input picture processor to the second select module 332.Select this moment second module 352 be the low-voltage differential signal 358 of selective reception north bridge chips 31 outputs as its effective input, and directly export display panel 38 to show television image.
Similarly, the switching of above-mentioned three kinds of mode of operations is by switch control unit 308 controls, selects module 330 and second to select module 332 effective output terminal and input ends to adjust first.As the system that comprises Video Graphics Array, switch control unit 308 more also triggers the computer installation of control initialization control module 300 with drive part.
The explanation of synthesizing map 6A Fig. 6 C, when system does not contain Video Graphics Array, first selects module 330 when shutdown mode and television mode, all be that the television image data 350 that will import export Date Conversion Unit 302 to, therefore image processor 36 is in the following time of display system architecture that is applied to not contain Video Graphics Array, can further omit first and select module 330 and directly the television image data 350 of input are electrically connected to Date Conversion Unit 302.Thereby new image processor framework such as Fig. 7, second selects module to replace (function is still identical) by selection module 732, and data output interface is connected to South Bridge chip 30, and all the other each unit remain unchanged.
Must lay special stress at this, more than computing machine display system of Jie Luing and image processor are not to be used in mobile computer, but it can effectively solve in the prior art mobile computer and can't set aside the difficulty of placing TV image not starting the operating system, in fact also can be used in the desktop computer systems, that is the present invention mainly provides a kind of new display system architecture and image processor, and is not restricted to mobile computer.
The above is preferred embodiment of the present invention only, is not in order to limit the right of applying for a patent of the present invention; Simultaneously above description should be understood and be implemented for the special personage who knows the present technique field, so other does not break away from the equivalence of being finished under the disclosed spirit of the present invention and change or modification, all should be included in the following claim.
Claims (30)
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| CNB2004101021463A CN100507825C (en) | 2004-12-20 | 2004-12-20 | Computer image system and processing device |
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| US7730336B2 (en) * | 2006-05-30 | 2010-06-01 | Ati Technologies Ulc | Device having multiple graphics subsystems and reduced power consumption mode, software and methods |
| CN101448149B (en) * | 2007-11-26 | 2011-03-30 | 联想(北京)有限公司 | Computer and method for playing animations during startup process thereof |
| US8022956B2 (en) * | 2007-12-13 | 2011-09-20 | Ati Technologies Ulc | Settings control in devices comprising at least two graphics processors |
| CN101673143B (en) * | 2008-09-12 | 2011-07-20 | 宏正自动科技股份有限公司 | Interface card |
| CN101765024A (en) * | 2009-12-22 | 2010-06-30 | 周晓民 | 3D stereoscopic video signal converter and technical application thereof |
| CN102447962B (en) * | 2010-09-30 | 2016-03-30 | 联想(北京)有限公司 | A kind of terminal and display packing with TV functions |
| CN102867500B (en) * | 2011-07-07 | 2014-11-26 | 冠捷投资有限公司 | Display control device and USB control method thereof |
| CN104077543B (en) * | 2013-03-28 | 2018-11-09 | 联想(北京)有限公司 | A kind of method and a kind of electronic equipment of control electronics |
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| US6243743B1 (en) * | 1998-01-29 | 2001-06-05 | Automated Business Companies | Split personal computer system |
| CN1104676C (en) * | 1999-11-25 | 2003-04-02 | 神达电脑股份有限公司 | Display system that accepts a variety of input signals |
| CN2459699Y (en) * | 2000-02-03 | 2001-11-14 | 上海广电金星电子有限公司 | Television, computer integrated unit |
| CN1177476C (en) * | 2000-12-01 | 2004-11-24 | 神基科技股份有限公司 | Video signal conversion method for computer |
| CN1512330A (en) * | 2002-12-27 | 2004-07-14 | 联想(北京)有限公司 | Method for realizing computer and TV set combination |
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| Publication number | Publication date |
|---|---|
| CN1797322A (en) | 2006-07-05 |
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