CN102314826A - Electronic device, display driving device and method for displaying digital content - Google Patents
Electronic device, display driving device and method for displaying digital content Download PDFInfo
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- CN102314826A CN102314826A CN2010102220864A CN201010222086A CN102314826A CN 102314826 A CN102314826 A CN 102314826A CN 2010102220864 A CN2010102220864 A CN 2010102220864A CN 201010222086 A CN201010222086 A CN 201010222086A CN 102314826 A CN102314826 A CN 102314826A
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Abstract
The invention discloses an electronic device, a display driving device and a method for displaying a digital content. The method for displaying the digital content is applicable to the electronic device. The electronic device comprises at least one display interface and at least one display driving device. The method for displaying the digital content comprises the following steps of: receiving one encrypted digital content by using the display driving device; decrypting the digital content by using the display driving device according to a calculating method; and driving the display interface of the electronic device by using the display driving device according to the decrypted digital content to display the digital content on the display interface.
Description
Technical field
The present invention relates to a kind of electronic installation, display drive apparatus and digital content display packing thereof, particularly relate to a kind of electronic installation, display drive apparatus and digital content display packing thereof with digital content protection mechanism.
Background technology
Arriving along with the information age; Spread all over all over the world communication network except can providing one easily the line of communication, people can also by various electronic installation through communication network whenever and wherever possible down loading network resource, play digitized video or even reading electronic book.Through communication network, not only create the more interesting life of horn of plenty for the modern, also promoted people simultaneously and obtained and the convenience of exchange of information each other.
Utilize the electronic installation down loading network resource for fear of being accompanied by; And then possibly cause all copyright relevant issues such as bootlegging, use or Data transmission, the digital content that how spreads on the protecting network also becomes one of subject under discussion that electronics manufacturer focuses on gradually.
To the characteristic that digital content is replicated easily and scatters, digital copyright management (Digital Rights Management, DRM) technology have also been developed recently in order to the protection digital content.The digital copyright management technology is that digital content is carried out cryptographic operation in simple terms, and limits the pipeline of its circulation according to this, and the electronic installation that only allows to have authority is opened use.That is to say, receive the digital content that digital copyright management mechanism is protected, is on playing or transmitting, all can receive certain restriction.Not only can safeguard literary property thus, also can avoid the stolen situation of digital content simultaneously.
Moreover; General LCD, organic light emitting diode display and lighting transistor (Light Emitting Transistor; Display such as LET); Its display drive apparatus nothing more than by source electrode driver, gate drivers, the conversion of analog digital signal, boost or reduction voltage circuit, or digital control circuit, other mimic channels are formed.Generally speaking, a source electrode driver or a gate drivers have dozens of even up to a hundred passages usually respectively.Therefore, display drive apparatus can be in order to other circuit control states such as coordinates operation of source driver, gate drivers.And in order to receive successional videl signal, giant display all can arrange in pairs or groups top box of digital machine, in build videl signal decoding chip or external video decoded device etc.This video signal data is shown after reception, and one comes cost higher, because of need increase extra chips or device more; Two come the signal data after its decoding conversion, and before sending display drive apparatus to, its signal has the risk that is logged easily.
Fig. 1 shows the display that general hand-held device is used.Please refer to Fig. 1; Display 10 comprises panel body 12 (display panels or organic LED panel), display drive apparatus 14 (general small handheld devices is used the display driver chip of single high integration), and soft board 16 (flexibleprinted circuit, FPC).Have connector and minority mu balanced circuit on the soft board 16, can join with outer center processor, microcontroller or display chip.
The display driver chip of hand-held device is a highly integrated chip, comprises source electrode driver, gate drivers, digital control circuit, power-switching circuit, D/A conversion circuit etc. usually.These circuit are to be integrated in single chips.
Fig. 2 shows general hand-held or non-hand-held device.Please refer to Fig. 2; When desiring to show the digital content of protectiveness; Manufacturer adds a special encrypting and decrypting chip 20, and this encrypting and decrypting chip 20 belongs to extra cost, and all can increase to some extent for the power consumption degree and the circuit substrate area of hand-held device 10.In addition, decoding data are later had an opportunity externally very much, and (central processing unit, CPU) and between the display joint, with external instrument side record, so the digital content that institute's desire shows has the risk that is stolen to central processing unit 30.Its reason is that its signal and communications protocol mostly are not to be enciphered data no matter be central processing unit or display chip will transmit data to the chip for driving of display the time.Even if enciphered data, also encrypting and decrypting forms that belong to the industry common-use size can provide the corresponding mode that cracks at present existing manufacturer more.
Moreover; As do not use extra special encrypting and decrypting chip; Change and to write in the program of central processing unit encrypting algorithm; Its shortcoming is to cause the central processing unit operand to strengthen, the 2nd, and the central processing unit procedure code can use reverse Engineering Technology, so the encrypting and decrypting algorithm easy crack of software-type.Its three, the same with the above-mentioned problem of carrying, decoding data are later had an opportunity externally to go with external instrument side record between central processing unit and display joint, so are difficult to reach the purpose of digital content protection very much.
Summary of the invention
The present invention provides a kind of digital content display packing, and it can use corresponding encryption method or decryption method according to the identifying information of electronic installation, the possibility that the digital content that shows with reduction institute desire is cracked by unwarranted electronic installation.
The present invention provides a kind of electronic installation, and it uses above-mentioned digital content display packing, has digital content protection mechanism, can reduce the possibility that digital content that the institute desire shows is cracked by unwarranted electronic installation.
The present invention provides a kind of display drive apparatus, and it uses above-mentioned digital content display packing, has digital content protection mechanism, can reduce the possibility that digital content that the institute desire shows is cracked by unwarranted electronic installation.
The present invention provides a kind of digital content display packing, and it is suitable for an electronic installation, and wherein electronic installation comprises a display interface and a display drive apparatus at least.The digital content display packing comprises the steps.By display drive apparatus, receive the digital content after encrypting.By display drive apparatus, according to one first algorithm, to decrypted digital content.By display drive apparatus, according to the digital content after the deciphering, the display interface of drive electronics is so that display interface display digit content.
In an embodiment of the present invention, before the step that receives the digital content after encrypting, the digital content display packing also comprises by display drive apparatus, and identifying information to a far end device is provided.Wherein, the corresponding display drive apparatus of identifying information, and far end device utilizes the first algorithm encrypted digital content of corresponding identifying information, and provide digital content after the encryption to electronic installation.
In an embodiment of the present invention, before the step that identifying information to far end device is provided, the digital content display packing also comprises by display drive apparatus, encrypts identifying information.Wherein, in the step that identifying information to far end device is provided,, provide the identifying information and after the encryption to maintain secrecy golden key, wherein the far end device utilization golden key deciphering identifying information of maintaining secrecy to far end device by display drive apparatus.
In an embodiment of the present invention, before the step of the identifying information after encryption is provided and golden key to the far end device of maintaining secrecy, the digital content display packing also comprises by display drive apparatus, encrypts the golden key of maintaining secrecy.Wherein, in the step that identifying information to far end device is provided, by display drive apparatus, the identifying information after the encryption is provided and encrypt after secret golden key to far end device, wherein far end device utilizes the one second algorithm deciphering golden key of maintaining secrecy.
In an embodiment of the present invention; Before the step of secret golden key to the far end device after identifying information after encryption is provided and the encryption; The digital content display packing comprises also that by display drive apparatus identifying information after conversion is encrypted and the secret golden key after the encryption are a data stream.Wherein, in the step that identifying information to far end device is provided,, provide data stream to far end device by display drive apparatus.
In an embodiment of the present invention, provide at display drive apparatus before the step of data stream to far end device, the digital content display packing also comprises by display drive apparatus, encrypting traffic.Wherein, in the step that identifying information to far end device is provided, by display drive apparatus, provide data encrypted to flow to far end device, wherein far end device utilizes one the 3rd algorithm decrypted data stream.
In an embodiment of the present invention, above-mentioned electronic installation also comprises a processing unit and a network connections device.Before the step that identifying information to far end device is provided, the digital content display packing also comprises the steps.By the network connections device, set up a line with far end device.By processing unit, require display drive apparatus that identifying information is provided.Wherein, in the step that identifying information to far end device is provided, also provide identifying information to far end device by processing unit and network connections device.
In an embodiment of the present invention, above-mentioned display drive apparatus comprises a storer.The digital content display packing also comprises: by the secret golden key of memory storage corresponding to digital content, to allow user's off-line browsing.
The present invention provides a kind of electronic installation, and it is suitable for the digital content that shows that a far end device is provided.Electronic installation comprises a display interface and a display drive apparatus.Display interface is in order to the display digit content.Digital content after display drive apparatus is encrypted in order to reception, and according to one first algorithm, to decrypted digital content, and according to the digital content after the deciphering, the driving display interface is so that display interface display digit content.
The present invention provides a kind of display drive apparatus, and it is suitable for driving the digital content that a display interface shows that a far end device is provided.Display drive apparatus comprises an encryption and a decrypting device and a display driver unit.Digital content after encryption and decrypting device are encrypted in order to reception, and according to one first algorithm, to decrypted digital content.The display driver unit drives display interface, so that display interface display digit content according to the digital content after deciphering.
Based on above-mentioned; In an embodiment of the present invention; Electronic installation is before receiving digital contents; The identifying information that display drive apparatus can be provided is to far end device, so that the algorithm of the corresponding identifying information of far end device utilization is come encrypted digital content, to reduce the possibility that digital content is cracked by unwarranted electronic installation.
For making the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and is described with reference to the accompanying drawings as follows.
Description of drawings
Fig. 1 shows the display that general hand-held device is used.
Fig. 2 shows general hand-held or non-hand-held device.
Fig. 3 is the electronic installation with digital content protection mechanism of one embodiment of the invention.
Fig. 4 is the process flow diagram of the digital content display packing of one embodiment of the invention, and it shows the step that transmits enciphered data to far end device about the electronic installation of Fig. 3.
Fig. 5 is that the display drive apparatus of one embodiment of the invention is to its identifying information method of encrypting process flow diagram.
Fig. 6 is the process flow diagram of the digital content display packing of one embodiment of the invention, and it shows the step that transmits enciphered data to electronic installation about the far end device of Fig. 3.
Fig. 7 shows the electronic installation with digital content protection mechanism of another embodiment of the present invention.
Fig. 8 shows the display drive apparatus of the tool encrypting and decrypting function of one embodiment of the invention.
Fig. 9 shows the display drive apparatus with encrypting and decrypting function of another embodiment of the present invention.
Figure 10 is the block schematic diagram of the encrypt and decrypt unit of one embodiment of the invention.
The reference numeral explanation
10: display
12: the panel body
14: display drive apparatus
16: soft board
20: the encrypting and decrypting chip
30: central processing unit
100: electronic installation
110: display interface
120: display drive apparatus
122: encrypt and decrypting device
124: the display driver unit
130: processing unit
140: the network connections device
200: far end device
510: display device
512: display driver chip
520: central processing unit
530: communicating circuit
540: far end system
700,800: display drive apparatus
710,810: general-purpose interface and input and output control unit
720,820: digital control circuit
730,830: RAS
740,840: ROM (read-only memory)
750,850,950: the encrypt and decrypt unit
952a: ciphering unit
952b: decrypting device
954: the first data processing units
956: the second data processing units
958: digital control unit
S200, S202, S204, S206, S208, S300, S302, S304, S306, S400, S402, S404, S406, S408: step
S1: transmission path
Embodiment
In order to protect the digital publishing rights of digital content; In the electronic installation receiving digital contents; If far end device can be according to the identifying information of the electronic installation that receives itself, the digital content that present electronic installation institute desire receives is carried out cryptographic operation, only can broadcast in this device and limit this digital content; Can guarantee that promptly digital content can not abused by unwarranted electronic installation, and reach the purpose of digital copyright management.
The present invention is based on above-mentioned at least principle, avoid digital content by unwarranted electronic installation abuse develop a kind of digital content display packing of.In order to make content of the present invention more clear, below specially lift the example that embodiment can implement as the present invention really according to this.
Among the embodiment below; Will with for example be the portable electron device of mobile computer, e-book player and hand-holding communication device etc. as exemplary embodiment, those skilled in the art should know that portable electron device is not in order to limit electronic installation of the present invention.In other embodiment, electronic installation for example can be the electronic installation that desktop PC etc. has the digital content Presentation Function.In addition, the present invention does not also limit the form of digital content, any dynamically, the form of digital contents such as static state, message, video signal, bidimensional image picture or 3-dimensional image picture is all the category that institute of the present invention desire is protected.
Fig. 3 is the electronic installation with digital content protection mechanism of one embodiment of the invention.Please refer to Fig. 3, the electronic installation 100 of present embodiment comprises a display interface 110, a display drive apparatus 120, a processing unit 130 and a network connections device 140.
In the present embodiment, electronic installation 100 can receive the digital content that a far end device 200 is provided, and its content for example can be music document or dynamic or static image document, does not limit its scope at this.
Before receiving digital contents, electronic installation 100 provides the identifying information of its display drive apparatus 120 to far end device 200 earlier, so that far end device 200 can use corresponding algorithm to this encrypt digital content according to the identifying information of display drive apparatus 120.Therefore, after the digital content after receive encrypting, the display drive apparatus 120 of electronic installation 100 can be according to the algorithm of correspondence to this decrypted digital content, and then shows this digital content.
At this, the identifying information of display drive apparatus 120 for example comprises the device model that can represent display drive apparatus 120, or when display drive apparatus 120 design set any identifying information due to display drive apparatus 120.
Therefore; In the present embodiment; Far end device 200 can carry out cryptographic operation to the digital content that electronic installation 100 present institute desires receive; Only can in electronic installation 100, play and limit this digital content, can guarantee that promptly digital content can not abused by unwarranted electronic installation, and reach the purpose of digital copyright management.
In the present embodiment, electronic installation 100 can for example be an e-book player.At this moment, electronic installation 100 can be downloaded the digital content of e-book by the far end device (the for example service platform of network electronic bookstore) that e-book supplier is provided through wireless or wired communication network.Before electronic installation 100 was downloaded e-book, far end device can or not abused by unwarranted electronic installation to guarantee digital content according to the identifying information of the display drive apparatus 120 of the electronic installation encrypt digital content to e-book.
In the present embodiment, electronic installation 100 also can for example be a multimedia video player.At this moment, electronic installation can be downloaded the digital content of audio-visual document by the far end device (for example audio-visual document exchanges the service platform of website) that multimedia video supplier is provided through wireless or wired communication network.Before electronic installation was downloaded audio-visual document, far end device can or not abused by unwarranted electronic installation to guarantee digital content according to the identifying information of the display drive apparatus of the electronic installation encrypt digital content to audio-visual document.
In detail, in the present embodiment, network connections device 140 is in order to set up a line with far end device 200.Processing unit 130 provides identifying information in order to require display drive apparatus 120, and requires network connections device 140 and far end device 200 to set up line.At this, processing unit 130 for example be a central processing unit (central processing unit, CPU) or one be MCU Microprocessor Control Unit (microprocessor control unit, MCU).
Because crucial encrypting and decrypting step can be carried out at display drive apparatus and far end device,, also have no way of knowing that this data stream is using which kind of algorithm to carry out encrypting and decrypting, and then digital content is able to obtain guarantee even therefore the data stream of processing unit is captured.
At this, display drive apparatus 120 comprises that one encrypts and a decrypting device 122 and a display driver unit 124.Encrypt and decrypting device 122 in order to receiving the digital content after encrypting, and according to the algorithm of 200 pairs of encrypt digital content of far end device, to decrypted digital content.Display driver unit 124 drives display interface 124 according to the digital content after deciphering, so that display interface 124 display digit contents.
In the present embodiment, display drive apparatus 120 comprise at least a can to the algorithm of the algorithm of decrypted digital content, at least a secret golden key deciphering that can provide far end device 200, at least a algorithm that can the secret golden key of display drive apparatus 120 be encrypted or at least a can be with the block encryption of data stream or the algorithm of deciphering.
It should be noted that; In the present embodiment; The digital content that 100 pairs of far end devices 200 of electronic installation are provided or the identifying information of display drive apparatus 120 are encrypted or the process of deciphering all is performed by display drive apparatus 120; And processing unit 130 only is that the data of relevant digital content are transmitted, and carries out transmission initial orders at the beginning.
Fig. 4 is the process flow diagram of the digital content display packing of one embodiment of the invention, and it shows the step that transmits enciphered data to far end device about the electronic installation of Fig. 3.
Please refer to Fig. 3 and Fig. 4, at first, in step S200, when electronic installation 100 desires were downloaded the digital content of far end device 200, processing unit 130 can require network connections device 140 and far end device 200 to set up line.At this, network connections device 140 can for example be a wireless link device or a cable network hookup mechanism.
In the present embodiment; Electronic installation 100 for example can be connected to far end device 200 (for example the telecommunications dealer provides the host computer system of download service) through wireless communication networks; And according to wireless application protocol for example (Wireless Application Protocol is WAP) from far end device 200 download digital contents.In addition, electronic installation 100 for example can also be connected to network servicer through the Internet, and from the network servicer download digital content.
Then; In step S202; Processing unit 130 requires display drive apparatus 120 that its identifying information is provided; And this identifying information for example comprises the device model that can represent display drive apparatus 120, or when display drive apparatus 120 design set any identifying information due to display drive apparatus 120.
At this; Processing unit 130 for example is line communications protocol or the rule that provides according to application program; Require display drive apparatus 120 that its identifying information is provided with the mode of encrypting or do not encrypt; And this identifying information helps far end device 200 after receiving the identifying information of encrypting or not encrypting, and does two-way communication with the encryption of correspondence and manner of decryption and display drive apparatus 120.
Therefore, in step S204, after the order that receives processing unit 130, display drive apparatus 120 can provide the related data that comprises its identifying information at least to processing unit 130, and this related data can be to encrypt or ciphered data not.If this related data is a ciphered data, the related data after then this encrypts can be that processing unit 130 can be deciphered or can not decrypted data.
Afterwards, in step S206, after obtaining the related data that comprises its identifying information at least that display drive apparatus 120 provides, processing unit 130 transmits this related data to far end devices 200 through network connections device 140 again.
In the present embodiment, rule or method that processing unit 130 can provide according to application program, the related data that display drive apparatus 120 is provided converts the data stream of a specific format earlier to.Afterwards, processing unit 130 transmits this data stream to far end device 200 by network connections device 140 again.In addition, processing unit 130 mode that can encrypt or not encrypt transmits this related data or data stream to far end device 200.
Continue it; In step S208; After receiving the related data or data stream of encrypting or not encrypting; Far end device 200 can be deciphered the related data or the data stream of encrypting with the rule or the algorithm of correspondence, and then this related data of interpretation or data stream, to obtain the identifying information of display drive apparatus 120.
Therefore, after the identifying information that obtains display drive apparatus 120, the mode that far end device 200 meetings are linked up as transmission between the two with encryption or deciphering algorithm, transmission rule or the communications protocol of corresponding display drive apparatus 120.For example, far end device 200 can utilize one first algorithm of the identifying information of corresponding display drive apparatus 120, the digital content that encrypted electronic device 100 present institute desires receive.
So; By the digital content display packing that embodiments of the invention provided; Far end device 200 can carry out the corresponding encryption or the operation of deciphering to the digital content that electronic installation 100 present institute desires receive according to the identifying information of display drive apparatus 120, only can in electronic installation 100, play and limit this digital content; Can guarantee that promptly digital content can not abused by unwarranted electronic installation, and reach the purpose of digital copyright management.
It should be noted that in step S204 after the order that receives processing unit 130, display drive apparatus 120 can provide the related data that comprises its identifying information at least to processing unit 130, and this related data can be to encrypt or do not encrypt.
Fig. 5 is that the display drive apparatus of one embodiment of the invention is to its identifying information method of encrypting process flow diagram.Please with reference to Fig. 3 to Fig. 5, the related data that the display drive apparatus 120 of present embodiment offers processing unit 130 is a data stream encrypted, but the present invention is not limited to this.
In the present embodiment, display drive apparatus 120 comprise at least a can to the algorithm of the algorithm of decrypted digital content, at least a secret golden key deciphering that can provide far end device 200, at least a algorithm that can the secret golden key of display drive apparatus 120 be encrypted or at least a can be with the block encryption of data stream or the algorithm of deciphering.
Therefore, in step S300, before identifying information to processing unit 130 was provided, display drive apparatus 120 can be encrypted its identifying information earlier.At this moment, the related data that display drive apparatus 120 is provided comprises an identifying information and the secret golden key after the encryption at least, and wherein far end device 200 is the identifying informations that utilize the golden key deciphering display drive apparatus 120 of maintaining secrecy.
Then, in step S302, display drive apparatus 120 is further encrypted the golden key of maintaining secrecy.At this moment, the related data that display drive apparatus 120 is provided comprise the identifying information after the encryption at least and encrypt after secret golden key, wherein far end device 200 is to utilize corresponding algorithm (for example one second algorithm) the deciphering golden key of maintaining secrecy.
Afterwards, in step S304, identifying information after display drive apparatus 120 conversions are encrypted and the secret golden key after the encryption are a data stream.At this moment, the data stream that display drive apparatus 120 is provided, its divide into groups to comprise at least the identifying information after the encryption and encrypt after secret golden key.
Continue it, in step S306, display drive apparatus 120 further encrypting traffics.At this moment, display drive apparatus 120 provides data encrypted to flow to processing unit 130, and wherein far end device 200 utilizes corresponding algorithm (for example one the 3rd algorithm) decrypted data stream.
Therefore; After each step of accomplishing the identifying information encryption; If display drive apparatus 120 receives the order of processing unit 130; Display drive apparatus 120 identifying information that comprises at least after the encryption can be provided and encrypt after the data stream of secret golden key to processing unit 130, and this data stream is a data encrypted stream.
It should be noted that in the method flow of Fig. 4 and Fig. 5, can be identical or different to the algorithm of identifying information, maintain secrecy golden key and traffic encryption or deciphering.
In the present embodiment, ciphering process is performed by display drive apparatus 120, and decrypting process is performed by far end device 200.Therefore, even any related data is arranged in transfer path, also can't know and which kind of algorithm to do deciphering with by unwarranted electronic installation intercepting.
Fig. 6 is the process flow diagram of the digital content display packing of one embodiment of the invention, and it shows the step that transmits enciphered data to electronic installation about the far end device of Fig. 3.Please with reference to Fig. 3, Fig. 4 and Fig. 6, after the identifying information that obtains display drive apparatus 120, far end device 200 can return the digital content that 100 desires of electronic installation show.
In step S400, the encrypt digital content that far end device 200 can return desire earlier.In the present embodiment, to be back to electronic installation for example be data encrypted stream to far end device 200.It should be noted that; Because the data stream of far end device 200 passbacks comprises the digital content that institute's desire ensures; Therefore when the passback data stream; Far end device 200 meetings are to this digital content and traffic encryption, and the algorithm of corresponding its encryption can use different encryption algorithms encrypt to different parts.
For example; Far end device 200 can be held (Handsha king) control or status information encryption to the grouping information of data stream, necessary friendship with a kind of specific algorithm; And to the digital content of real desire protection in the data stream; Do encryption with another kind of algorithm again, end is seen the degree that far end device 200 can be supported.
Because far end device 200 has obtained the identifying information of display drive apparatus 120; Therefore far end device 200 can select the algorithm of corresponding display drive apparatus 120 to come encrypted digital content and data stream; Even new secret golden key is provided, so that display drive apparatus 120 can corresponding algorithm come decrypts digital content and data stream.
Then, in step S402, far end device 200 spreads data encrypted delivers to electronic installation 100.
Afterwards, in step S404, electronic installation 100 is set up line through network connections device 140 and 200 of far end devices and is received data encrypted stream.
Continue it, in step S404, processing unit 130 is obtained data encrypted stream by network connections device 140, and is sent to display drive apparatus 120.It should be noted that processing unit 130 is only obtained data encrypted stream by network connections device 140, can't be to the deciphering of data encrypted stream.
Then, in step S406, secret golden key and corresponding algorithm that display drive apparatus 120 provides according to far end device 200 are to digital content and data stream deciphering.
Therefore, in step S408, display drive apparatus 120 drives display interface 110, so that its display digit content according to the digital content after deciphering.
In the present embodiment, the information below the grouping of data stream can comprise at least: with which kind of algorithm to the information of the decrypted digital content that far end device provided, will with which kind of algorithm to golden key decryption information that far end device provided, let far end device know will to encrypt or the information of deciphering, let far end device and display drive apparatus know that the grouping of data stream will be with the information of which kind of encryption or deciphering algorithm and the digital content desiring to obtain with the golden key that the corresponding display drive apparatus of which kind of algorithm provides.
In addition, in the present embodiment, the encryption of display drive apparatus or deciphering algorithm can be renewable or non-renewable.Display drive apparatus and far end device when communication, the digital content of the non-desire protection in the data stream partly, or nonessential data can be selected to encrypt or do not encrypted to save frequency range.For example, the digital content of non-desire protection or nonessential data for example are the groupings that control is held in error message, status information or the friendship of transmission.In addition, when display drive apparatus and far end device communication, can compressed format or Uncompressed Image Format transmit.
In addition, no matter display drive apparatus or far end device to above-mentioned each partly the algorithm of encryption or the deciphering of data can be identical or inequality.In the present embodiment; The process of golden key, digital content or traffic encryption or deciphering of no matter maintaining secrecy is performed by display drive apparatus or far end device; And processing unit 130 only is that the data of relevant digital content are transmitted, and carries out transmission initial orders at the beginning.So, even the golden key, data stream encrypted, encrypted digital content or the three that encrypt all by intercepting, unwarranted electronic installation also is unable to find out display drive apparatus 120 and far end device 200 and is used for the algorithm of encrypting or deciphering.
With regard to electronic installation, display drive apparatus can provide at least a encrypting and decrypting or algorithm and exclusive golden key.With regard to far end device; It comprises strict encryption, deciphers database, fire wall or toxicological operation protective system; No matter be that the algorithm that the display drive apparatus of which kind of electronic installation can be used all can be customized according to demand, to reduce the possibility that digital content is cracked or time and the required cost of resource that lets unwarranted electronic installation crack is very acute.
In addition, in another embodiment, the secret golden key from this digital content of far end system acquisition allows to be stored in the particular memory device of display drive apparatus, is able to off-line browsing for digital content.For example, above-mentioned display drive apparatus can also comprise a storer, in order to store the secret golden key corresponding to digital content, to allow user's off-line browsing.Different digital contents can corresponding identical or different secret golden key.Digital content can be stored in the outside by cipher mode.Because golden key and encrypt algorithm and all be stored in the display drive apparatus,, can realize that still data ensure purpose even therefore the off-line browsing content is deposited to encrypt kenel and is stored in the display driver outside.
Fig. 7 shows the electronic installation with digital content protection mechanism of another embodiment of the present invention.Please refer to Fig. 7, in the present embodiment, electronic installation 500 for example comprises display device 510, central processing unit 520 and communicating circuit 530.
In the present embodiment, encrypting and decrypting algorithm and golden key encrypting and decrypting mode all have only the display driver chip 512 of far end system 540 and display device 510 to possess.Therefore,, also do not have corresponding algorithm and golden key and can do deciphering, can reach the purpose of digital content protection to the data stream that is logged even enciphered data that central processing unit 520 receives or sends is suffered the side record.
In the present embodiment; The central processing unit 520 responsible encrypting traffics that far end system 540 is passed back; Directly send into 510 li of display device that possess the encrypting and decrypting algorithm, so the transmission path S1 of central processing unit 520 and display device 510 is that mode with special encryption is at the digital content data that transmits the desire protection.But, can also non-encrypted type mode go to carry out when transmitting video data for meeting universal application.
The display device 510 that possesses the encrypting and decrypting algorithm, its encrypting and decrypting mechanism starts or does not start and can be decided by following Several Factors:
(1) the hardware pin receives special data, special signal, special voltage level or specific current level.
(2) through universal transmission interface the defeated register of a certain spy or a plurality of specified register of display device are done specific setting.
(3) central processing unit and display device are recognized the special format data when carrying out the transmission of universal serial interfaces.
(4) central processing unit and display device are recognized the special format integrated data when carrying out the serial transmission of High Speed General type.
(5) no matter be that universal parallel or universal serial line interface changes with certain signal condition variation, change of frequency or level.
(6) use special interface transfer protocol.
(7) display device even the dedicated encrypted deciphering interface of a group or array is provided, and the outer center processor only needs enciphered data is is directly inputed or outputed this encrypting traffic through the interface of this special use.
Fig. 8 shows the display drive apparatus with encrypting and decrypting function of one embodiment of the invention.Please refer to Fig. 8, in the present embodiment, encrypt and decrypt unit 750 for example is to be disposed at general-purpose interface and input and output control unit 710 rear ends.When encrypt and decrypt unit 750 is activated with certain mode, and general-purpose interface and input and output control unit 710 for example be when sending into the data of ciphering type, and the then outside enciphered data of sending into can be sent into encrypt and decrypt unit 750 voluntarily to decipher.If the data that general-purpose interface and input and output control unit 710 are sent into are not the ciphering type data, perhaps encrypt and decrypt unit 750 is not driven with certain mode, and the then outside data of sending into can not passed through encrypt and decrypt unit 750.
Otherwise; When encrypt and decrypt unit 750 is activated with certain mode; When the special data of internal digital control circuit 720 desires passback arrived far end system, the information of desire protection can be passed through after the encrypt and decrypt unit 750, is directly seen off by general-purpose interface and input and output control unit 710 again.
In addition; Golden key mistake when the ciphering type data; Or when its ciphering type data kenel, format error, encrypt and decrypt unit 750 just can not solve correct data, more can further stop the data of mistake or digital control circuit 720 or other circuit that control code enters into the back level; And can send (or also can not sending) error messages to the outer center processing unit, and the mode that it sends can be to encrypt or do not encrypt.Perhaps, send special electrical specification variation, inform which kind of mistake takes place the present display device of external hardware by a certain of display device or certain several hardware pin position.
When encrypt and decrypt unit 750 is not activated through certain mode; If the outside data of sending into through general-purpose interface and input and output control unit 710 are the ciphering type data; Then can not carry out any decryption oprerations, and display device also can not show the digital content that desire ensures.
Fig. 9 shows the display drive apparatus with encrypting and decrypting function of another embodiment of the present invention.Please refer to Fig. 9, in the present embodiment, when encrypt and decrypt unit 850 is activated with certain mode, sends in the enciphered data of display drive apparatus 800 and can send into by the outside, to carry out decryption oprerations through the special interface of another kind.
Otherwise when encrypt and decrypt unit 850 was activated with certain mode, when the special data of internal digital control circuit 820 desires passback arrived far end system, the information of desire protection can be passed through after the encrypt and decrypt unit 850, is directly seen off by special interface again.
In addition; Golden key mistake when the ciphering type data; Or when its ciphering type data kenel, format error, encrypt and decrypt unit 850 just can not solve correct data, more can further stop the data of mistake or digital control circuit 820 or other circuit that control code enters into the back level.
When encrypt and decrypt unit 850 is not activated through certain mode,, then can not carry out any decryption oprerations even the outside data of sending into through special interface are the ciphering type data.
Figure 10 is the block schematic diagram of the encrypt and decrypt unit of one embodiment of the invention.Please refer to Figure 10, in the present embodiment, encrypt and decrypt unit 950 for example comprises ciphering unit 952a, decrypting device 952b, first data processing unit 954, second data processing unit 956 and digital control unit 958.Wherein, first data processing unit 954 for example is to compress or decompresses to data, and second data processing unit 956 for example is to differentiate to the enciphered data kenel of input, and carries out form to the enciphered data of output and recombinate.
When ciphering unit 952a and decrypting device 952b are started with certain mode; When encryption kenel data are sent into ciphering unit 952a and decrypting device 952b; At first second data processing unit 956 can carry out portion's differentiation just to the data of sending into; Guaranteeing whether its data layout of sending into meets the ciphered data kenel, or carry out error correction or change mistake to data.If its ciphered data kenel is unknown kenel; Or wrongly mistake to changing according to error correcting code; Then digital control unit 958 can be done suitable processing to this situation, for example returns that error messages or certain output can be exported special signal or display is not done any demonstration.
Be judged to not Wei known and correct kenel when the data kenel of sending into, if data are to belong to compression is arranged, then first data processing unit 954 can carry out decompression operation.Otherwise if data are to belong to not have compression, then data can enter into ciphering unit 952a and decrypting device 952b.Therefore, data compression or decompressing function can possess or not possess.
Otherwise when display drive apparatus 950 inside had the information of desire protection to want to be sent to the outside, whether the desire protection information that display drive apparatus 950 is seen off still can be carried out discriminating data through second data processing unit 956, be known format to discern its data.After ciphering unit 952a is with its data encryption, compress by first data processing unit 954.In addition, in order to prevent error in data, can in encrypt and decrypt unit 950, add the error correcting code encoding function.At last, second data processing unit 956 is done last reorganization with the data that each unit produced, and its recombination form and order do not limit its scope, to let outside (far end system) discern and to decipher.
In sum; In an embodiment of the present invention, electronic installation is before download digital content, and the identifying information that can display drive apparatus be provided earlier is to far end device; So that far end device uses the algorithm of corresponding identifying information to come encrypted digital content, to reduce the possibility that digital content is cracked.Therefore, the digital content display packing of embodiments of the invention can guarantee that digital content can not abused by unwarranted electronic installation, and reaches the purpose of digital copyright management.
Though the present invention discloses as above with embodiment; Right its is not in order to qualification the present invention, those skilled in the art, under the premise without departing from the spirit and scope of the present invention; Can do some changes and retouching, so protection scope of the present invention is as the criterion with claim of the present invention.
Claims (10)
1. a digital content display packing is suitable for an electronic installation, and wherein this electronic installation comprises a display interface and a display drive apparatus at least, and this digital content display packing comprises:
By this display drive apparatus, receive the digital content after encrypting;
By this display drive apparatus, according to one first algorithm, to this decrypted digital content; And
By this display drive apparatus, according to this digital content after the deciphering, drive this display interface of this electronic installation, so that this display interface shows this digital content.
2. digital content display packing as claimed in claim 1, before this step that receives this digital content after encrypting, this digital content display packing also comprises:
By this display drive apparatus; One identifying information to a far end device is provided; Wherein this identifying information is to should display drive apparatus; And this far end device utilizes this first algorithm that should identifying information encrypted this digital content, and provides this digital content after the encryption to this display drive apparatus.
3. digital content display packing as claimed in claim 2, wherein before this step of this identifying information to this far end device was provided, this digital content display packing also comprised:
By this display drive apparatus; Encrypt this identifying information; Wherein in this step of this identifying information to this far end device is provided; By this display drive apparatus, provide this identifying information and after the encryption to maintain secrecy golden key, wherein this far end device utilization golden this identifying information of key deciphering of should maintaining secrecy to this far end device.
4. digital content display packing as claimed in claim 3 wherein provides before this step of this identifying information and this golden key to this far end device of maintaining secrecy after the encryption, and this digital content display packing also comprises:
By this display drive apparatus; Encrypt the golden key of to maintain secrecy; Wherein in this step of this identifying information to this far end device is provided; By this display drive apparatus, this identifying information after the encryption is provided and encrypt after the golden key of should maintaining secrecy to this far end device, wherein this far end device utilizes the one second algorithm deciphering golden key of should maintaining secrecy.
5. digital content display packing as claimed in claim 4, wherein before this step of golden key to this far end device of should maintaining secrecy after identifying information of this after encryption is provided and the encryption, this digital content display packing also comprises:
By this display drive apparatus; The golden key of should maintaining secrecy after this identifying information after conversion is encrypted and the encryption be a data stream; Wherein in this step of this identifying information to this far end device is provided,, provide this data stream to this far end device by this display drive apparatus.
6. digital content display packing as claimed in claim 5, wherein before this step of this data stream to this far end device was provided, this digital content display packing also comprised:
By this display drive apparatus; Encrypt this data stream, wherein in this step of this identifying information to this far end device is provided, by this display drive apparatus; Provide this data stream after the encryption to this far end device, wherein this far end device utilizes this data stream of one the 3rd algorithm deciphering.
7. digital content display packing as claimed in claim 6, wherein this display drive apparatus comprises a storer, this digital content display packing also comprises:
By this storer, store the golden key of should maintaining secrecy, to allow user's off-line browsing corresponding to this digital content.
8. digital content display packing as claimed in claim 2, wherein this electronic installation also comprises a processing unit and a network connections device, before this step of this identifying information to this far end device was provided, this digital content display packing also comprised:
By this network connections device, set up a line with this far end device; And
By this processing unit, require this display drive apparatus that this identifying information is provided, wherein in this step of this identifying information to this far end device is provided, also, provide this identifying information to this far end device by this processing unit and this network connections device.
9. electronic installation is suitable for showing the digital content after the deciphering, and this electronic installation comprises:
One display interface is in order to show this digital content; And
One display drive apparatus in order to this digital content after the reception encryption, and according to an algorithm, to this decrypted digital content, and according to this digital content after the deciphering, drives this display interface, so that this this digital content of display interface demonstration.
10. a display drive apparatus is suitable for driving the digital content after a display interface shows deciphering, and this display drive apparatus comprises:
One encrypts and decrypting device, this digital content after encrypting in order to reception, and according to an algorithm, to this decrypted digital content after encrypting; And
One display driver unit, this digital content according to after the deciphering drives this display interface, so that this display interface shows this digital content.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102220864A CN102314826A (en) | 2010-06-30 | 2010-06-30 | Electronic device, display driving device and method for displaying digital content |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102220864A CN102314826A (en) | 2010-06-30 | 2010-06-30 | Electronic device, display driving device and method for displaying digital content |
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| CN102314826A true CN102314826A (en) | 2012-01-11 |
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| CN2010102220864A Pending CN102314826A (en) | 2010-06-30 | 2010-06-30 | Electronic device, display driving device and method for displaying digital content |
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Application publication date: 20120111 |