CN116975889B - Display screen characteristic data storage and retrieval method, system, equipment and storage medium - Google Patents
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
- G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
- G06F11/1004—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's to protect a block of data words, e.g. CRC or checksum
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
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Abstract
The application relates to the technical field of data security, in particular to a method, a system, equipment and a storage medium for storing and retrieving display screen characteristic data, wherein the method comprises the steps of deploying an NVM memory on a driving chip of a display screen; during data storage, characteristic data of a display screen are obtained through test equipment, and a coding algorithm is used for confusing the characteristic data to obtain a password and a data stream; calculating the check code of the confused data stream, and combining the confused data stream and the check code into a new data packet; transmitting the data to the driving chip through the display screen interface and storing the data in the NVM memory; when the data is called, the data packet is read through the display screen interface, the check code is recalculated according to the data flow in the data packet, whether the check code is matched is judged, if so, the characteristic data is calculated through the reverse calculation of the password, and if not, the data packet is read again, the check code is calculated, and the matching is continued. The method and the device can store and call the characteristic data of the display screen more stably and effectively.
Description
Technical Field
The present disclosure relates to the field of data security technologies, and in particular, to a method, a system, an apparatus, and a storage medium for storing and retrieving display screen feature data.
Background
In the current display screen production industry, the requirements on indexes such as resolution, brightness, color gamut, flicker degree and the like of the display screen are higher and higher, so that the setting of the performance threshold of a product is stricter, and excessive first-check poor or matching poor is generated, so that the problem of how to improve the productivity and the yield is presented to engineers. However, these "defects" are not truly defective, and may be used to achieve proper performance through some calibration, post-software-level processing, or the use of proper component matching. For example, the brightness of a certain screen is 1% higher than that of other screens, the current can be regulated to a reasonable range in the later stage, and the screen is not different from a sea fishing needle when a pair of products with two optical centers being identical are needed to be picked. The characteristic data of these display screens are usually in the production terminals of manufacturers of display screens, and even in the production computers of a certain production line. At present, when the characteristic data of a screen is stored and called, the traditional method is that the characteristic data measured by an initial point is uploaded to a server, then bar codes are attached to products for one-to-one correspondence, and other subsequent sites are searched and obtained in a server database by scanning or inputting the bar codes.
However, the production of the display screen involves a certain locality, for example, the screen may be at point a, the lens at point B, the assembly at point C, and even across the country. Referring to FIG. 1, an exemplary flow of display production is shown, where a screen may go from plant A to plant B to plant C. There is a need for data sharing, such as when the B-factory needs to acquire the data of the screen of the a-factory, it is usually necessary to link to the server of the a-factory and then input the bar code for acquisition. At this time, various problems such as technical lines, network access rights, aging and the like are required to be encountered.
In summary, the conventional method needs to uniquely identify the product according to the bar code of the product itself. The method has two problems, namely, a plurality of manufacturers involved in the production process flow of the product, the code rules of the bar codes are different from each other, the bar codes are difficult to unify and have certain territory, and a plurality of bar codes are easy to confuse. Secondly, bar codes are usually pasted, and if the bar codes are stained or lost, the bar codes are difficult to trace. Therefore, how to store and retrieve the characteristic data of the display screen more stably and effectively is a problem to be solved at present.
Disclosure of Invention
The application provides a method, a system, equipment and a storage medium for storing and retrieving display screen characteristic data, which can store and retrieve the display screen characteristic data more stably and effectively. The application provides the following technical scheme:
in a first aspect, the present application provides a method for storing and retrieving display screen feature data, where the method includes:
the method comprises the steps of disposing an NVM memory on a driving chip of a display screen;
during data storage, obtaining characteristic data of a display screen through test equipment, and confusing the characteristic data by using an encoding algorithm to obtain a password and a data stream; calculating the check code of the confused data stream, and combining the confused data stream and the check code into a new data packet; transmitting the data packet to a driving chip through a display screen interface and storing the data packet in an NVM memory;
when data is called, a data packet is read through a display screen interface, check codes are recalculated according to the data flow in the data packet, whether the check codes are matched is judged, if so, characteristic data are calculated through reverse calculation of passwords, if not, the data packet is read again, the check codes are calculated, and matching is continued.
In a specific embodiment, before the data is transferred to the driver chip via the display interface and stored in the NVM memory, the method further includes:
checking whether the writing times of the NVM memory are exceeded, if yes, directly ending the data storage work; if the data is not exceeded, continuing the data storage work.
In a specific embodiment, said obfuscating said characteristic data using an encoding algorithm to obtain a password and a data stream comprises:
the method comprises the steps of generating a data stream by mixing characteristic data through an RC4 encryption algorithm, generating a password of the characteristic data at the same time, recovering the mixed data stream into the characteristic data by the password, and sending the password to a factory with a demand for calling the characteristic data.
In a specific embodiment, the calculating the check code of the obfuscated data stream includes: and calculating the check code of the confused data stream through a CRC check algorithm.
In a specific embodiment, the transmitting the data packet to the driver chip via the display interface and storing in the NVM memory includes:
and transmitting the data packet to the driving chip through the display screen interface, and storing the data packet in the NVM memory by writing a specific time sequence into the driving chip.
In a specific implementation manner, the recalculating the check code according to the data stream in the data packet, judging whether the check code is matched, if so, calculating the characteristic data through the password, if not, recalculating the data packet and calculating the check code, and continuing to match includes:
calculating the check code of the data flow in the data packet again through a CRC (cyclic redundancy check) algorithm, and comparing the recalculated check code with the check code in the data packet;
if the data stream is the same, the matching is correct, the data stream is proved to be not lost in the calling process, and then the characteristic data of the display screen is restored by combining the password generated when the characteristic data is stored through the encoding algorithm;
if the data packets are different, the matching fails, and the data streams are proved to have the loss phenomenon in the calling process, and because the data packets are read through the display interface sometimes, the data packets are required to be counted and re-read and new check codes are calculated at the moment in order to avoid the accidental data transmission as much as possible, and the data packets are continuously compared with the check codes in the data packets until the check codes are matched correctly, and the data packets are generally retried for three times.
In a specific embodiment, the test device is a camera, by means of which the optical information of the display screen is tested as characteristic data.
In a second aspect, the present application provides a display screen feature data storage and retrieval system, which adopts the following technical scheme:
a display screen feature data storage and retrieval system, comprising:
the memory deployment module is used for deploying the NVM memory on the driving chip of the display screen;
the data storage module is used for acquiring the characteristic data of the display screen through the test equipment when the data is stored, and confusing the characteristic data by using the coding algorithm to obtain a password and a data stream; calculating the check code of the confused data stream, and combining the confused data stream and the check code into a new data packet; transmitting the data to the driving chip through the display screen interface and storing the data in the NVM memory;
and the data calling module is used for reading the data packet through the display screen interface when the data is called, recalculating the check code according to the data flow in the data packet, judging whether the check code is matched, reversely calculating the characteristic data through the password if the check code is matched, and recalculating the data packet and calculating the check code if the check code is not matched, and continuing to match.
In a third aspect, the present application provides an electronic device comprising a processor and a memory; the memory stores a program that is loaded and executed by the processor to implement a display screen characteristic data storage and retrieval method as claimed in any one of claims 1 to 7.
In a fourth aspect, the present application provides a computer readable storage medium having stored therein a program which when executed by a processor is adapted to carry out a display screen characteristic data storage and retrieval method as claimed in any one of claims 1 to 7.
In summary, the beneficial effects of the present application at least include:
1) The characteristic data permanently follows the display screen to a certain extent, the data is mixed up by the coding algorithm, the anti-fake identification capability is certain, and the characteristic data is not easy to lose and have errors.
2) Compared with the traditional method, the characteristic data is read faster, and the database is not required to be searched.
The characteristic data are mixed up through an RC4 algorithm, a reader can reversely solve the correct data content to realize the confidentiality principle only by obtaining a decrypted password by adopting the RC4 algorithm, and the validity of the data is ensured through a CRC (cyclic redundancy check) algorithm; the characteristic data of the display screen can be stored and called more stably and effectively.
The foregoing description is only an overview of the technical solutions of the present application, and in order to make the technical means of the present application more clearly understood, it can be implemented according to the content of the specification, and the following detailed description of the preferred embodiments of the present application will be given with reference to the accompanying drawings.
Drawings
Fig. 1 is an exemplary schematic diagram in the background of the present application.
Fig. 2 is a flow chart of a method for storing display characteristic data in an embodiment of the present application.
Fig. 3 is a flowchart of a method for retrieving display screen feature data according to an embodiment of the present application.
FIG. 4 is a block diagram of an electronic device for display screen feature data storage and retrieval provided in one embodiment of the present application.
Detailed Description
The detailed description of the present application is further described in detail below with reference to the drawings and examples. The following examples are illustrative of the present application, but are not intended to limit the scope of the present application.
First, a description will be given of several terms involved in the present application.
NVM memory: also called a nonvolatile RAM manager, a piece of NVM memory is usually reserved on a typical display driver chip to store the initialized configuration of the screen. The driver chip with the NVM memory has MTP characteristics, and through a specific interface and operation timing, the data required by the user can be written again and permanently stored.
CRC algorithm: the CRC algorithm, namely the cyclic redundancy check algorithm, is a widely used check algorithm in the communication field and is derived from branches of linear block codes. The check code is calculated according to the principle of the modulo-2 division method.
RC4 algorithm: the RC4 algorithm is a technical means for encryption in the field of electronic information, is used for a wireless communication network, and is an electronic password.
Optionally, the method for storing and retrieving the display screen feature data provided in each embodiment is used for illustration in an electronic device, where the electronic device is a terminal or a server, and the terminal may be a mobile phone, a computer, a tablet computer, a scanner, an electronic eye, a monitoring camera, etc., and the embodiment does not limit the type of the electronic device.
Firstly, ensuring that the NVM memory is arranged on a driving chip in the display screen, which is required to store and retrieve the characteristic data, and if the NVM memory is not arranged, the NVM memory is required to be arranged or deployed on the driving chip in the display screen.
Referring to fig. 2, a flowchart of a method for storing display screen feature data according to an embodiment of the present application is shown, where the method is as follows:
when the display screen needs to store the characteristic data, the characteristic data of the display screen are firstly required to be obtained through the testing equipment, in the implementation, a camera is usually selected as the testing equipment, the optical information of the display screen obtained through the camera testing is used as the characteristic data of the display screen, and the characteristic data of each display screen are different.
And then, the acquired characteristic data are mixed by a coding algorithm, the check codes of the mixed data stream are calculated, and the mixed data stream and the check codes are combined into a new data packet. Specifically, the RC4 encryption algorithm is used for confusing the characteristic data to generate a data stream, and simultaneously generating a password of the characteristic data, wherein the password is used for restoring the confusing data stream into the characteristic data, and sending the password to a factory with the demand for calling the characteristic data. And then calculating the check code of the data stream through a CRC check algorithm, and combining the confused data stream and the check code into a new data packet.
After the data packets are combined, the writing times of the NVM memory generally have limited times, so that whether the writing times of the NVM memory exceed the limited times or not needs to be checked, if the writing times exceed the limited times, the data storage work is directly finished, if the writing times do not exceed the limited times, the characteristic data storage work is continued, the data packets are transmitted to the driving chip through the display screen interface, the data packets are stored in the NVM memory through writing specific time sequences into the driving chip, and therefore the storage work of the display screen characteristic data is completed.
Referring to fig. 3, a flowchart of a method for retrieving display screen feature data according to an embodiment of the present application is shown, where the method is as follows:
when the characteristic data of the display screen is required to be invoked, firstly, the data packet at the designated position is read through the display screen interface, the check code is recalculated according to the data flow in the data packet, and whether the check code is matched correctly is judged. Specifically, the check code of the data stream in the data packet is calculated again through the CRC algorithm, and the recalculated check code is compared with the check code in the data packet. If the feature data are the same, the matching is correct, the data stream is proved to be not lost in the process of calling, and then the feature data of the display screen are restored by combining the password generated when the feature data are stored through the RC4 algorithm, so that the work of calling the feature data of the display screen is completed. If the data packets are different, the matching fails, and the data streams are proved to have the loss phenomenon in the calling process, and because the data packets are read through the display interface sometimes, the data packets are required to be counted and re-read and new check codes are calculated at the moment in order to avoid the accidental data transmission as much as possible, and the data packets are continuously compared with the check codes in the data packets until the check codes are matched correctly, and the data packets are generally retried for three times.
In summary, since the communication interface of the display screen is a standard display screen interface, any manufacturer office can read and write, so in order to guarantee confidentiality and effectiveness of data to a certain extent, the application confuses the characteristic data through the RC4 algorithm, adopts the RC4 algorithm, and a reader can reversely solve correct data content to realize confidentiality principle only by obtaining decrypted passwords, and guarantees effectiveness of the data through the CRC check algorithm. Compared with the traditional method for storing and calling the characteristic data by using the bar codes, the method is more convenient and rapid to read the characteristic data, and database searching is not needed. Meanwhile, the characteristic data permanently follows the display screen to a certain extent, the data is mixed up through the coding algorithm, the anti-fake identification capability is certain, and the characteristic data is not easy to lose and make mistakes.
The embodiment of the application also provides a display screen characteristic data storage and retrieval system, which comprises the following modules:
and the memory deployment module is used for deploying the NVM memory on the driving chip of the display screen.
The data storage module is used for acquiring the characteristic data of the display screen through the test equipment when the data is stored, and confusing the characteristic data by using the coding algorithm to obtain a password and a data stream; calculating the check code of the confused data stream, and combining the confused data stream and the check code into a new data packet; data is transferred to the driver chip via the display screen interface and stored in the NVM memory.
And the data calling module is used for reading the data packet through the display screen interface when the data is called, recalculating the check code according to the data flow in the data packet, judging whether the check code is matched, and if the check code is matched, calculating the characteristic data through the password in a reverse way, and if the check code is not matched, recalculating the data packet, calculating the check code and continuing to match.
For relevant details reference is made to the method embodiments described above.
Fig. 4 is a block diagram of an electronic device provided in one embodiment of the present application. The device comprises at least a processor 401 and a memory 402.
Processor 401 may include one or more processing cores such as: 4 core processors, 8 core processors, etc. The processor 401 may be implemented in at least one hardware form of DSP (Digital Signal Processing ), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array ). The processor 401 may also include a main processor, which is a processor for processing data in an awake state, also called a CPU (Central Processing Unit ), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 401 may integrate a GPU (Graphics Processing Unit, image processor) for rendering and drawing of content required to be displayed by the display screen. In some embodiments, the processor 401 may also include an AI (Artificial Intelligence ) processor for processing computing operations related to machine learning.
Memory 402 may include one or more computer-readable storage media, which may be non-transitory. Memory 402 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 402 is used to store at least one instruction for execution by processor 401 to implement the display characteristic data storage and retrieval method provided by the method embodiments herein.
In some embodiments, the electronic device may further optionally include: a peripheral interface and at least one peripheral. The processor 401, memory 402, and peripheral interfaces may be connected by buses or signal lines. The individual peripheral devices may be connected to the peripheral device interface via buses, signal lines or circuit boards. Illustratively, peripheral devices include, but are not limited to: radio frequency circuitry, touch display screens, audio circuitry, and power supplies, among others.
Of course, the electronic device may also include fewer or more components, as the present embodiment is not limited in this regard.
Optionally, the application further provides a computer readable storage medium, in which a program is stored, and the program is loaded and executed by a processor to implement the method for storing and retrieving display screen feature data according to the above method embodiment.
Optionally, the application further provides a computer product, which includes a computer readable storage medium, where a program is stored, and the program is loaded and executed by a processor to implement the method for storing and retrieving display screen feature data according to the above method embodiment.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples represent only a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.
Claims (8)
1. A method for storing and retrieving display screen characteristic data, the method comprising:
the method comprises the steps of disposing an NVM memory on a driving chip of a display screen;
during data storage, obtaining characteristic data of a display screen through test equipment, and confusing the characteristic data by using an encoding algorithm to obtain a password and a data stream; calculating the check code of the confused data stream, and combining the confused data stream and the check code into a new data packet; transmitting the data to the driving chip through the display screen interface and storing the data in the NVM memory;
the step of using the coding algorithm to obfuscate the feature data to obtain a password and a data stream includes:
the method comprises the steps of generating a data stream by mixing characteristic data through an RC4 encryption algorithm, generating a password of the characteristic data at the same time, restoring the mixed data stream into the characteristic data by the password, and sending the password to a factory with a demand for calling the characteristic data;
the calculating the check code of the confused data stream comprises the following steps: calculating the check code of the confused data stream through a CRC check algorithm;
when data is called, a data packet is read through a display screen interface, check codes are recalculated according to the data flow in the data packet, whether the check codes are matched is judged, if so, characteristic data are calculated through reverse calculation of passwords, if not, the data packet is read again, the check codes are calculated, and matching is continued.
2. The method for storing and retrieving display characteristic data according to claim 1, wherein before the data is transmitted to the driving chip through the display interface and stored in the NVM memory, the method further comprises:
checking whether the writing times of the NVM memory are exceeded, if yes, directly ending the data storage work; if the data is not exceeded, continuing the data storage work.
3. The method for storing and retrieving display characteristic data according to claim 1, wherein transmitting the data packet to the driver chip through the display interface and storing the data packet in the NVM memory comprises:
and transmitting the data packet to the driving chip through the display screen interface, and storing the data packet in the NVM memory by writing a specific time sequence into the driving chip.
4. The method for storing and retrieving feature data of a display screen according to claim 1, wherein the step of recalculating the check code according to the data stream in the data packet, judging whether the check code is matched, if so, calculating feature data by reverse calculation through a password, and if not, recalculating the data packet and calculating the check code, and continuing the matching includes:
calculating the check code of the data flow in the data packet again through a CRC (cyclic redundancy check) algorithm, and comparing the recalculated check code with the check code in the data packet;
if the data stream is the same, the matching is correct, the data stream is proved to be not lost in the calling process, and then the characteristic data of the display screen is restored by combining the password generated when the characteristic data is stored through the encoding algorithm;
if the data packets are different, the matching fails, and the data streams are proved to have the loss phenomenon in the calling process, and because the data packets are read through the display interface sometimes, the data packets are required to be counted and re-read and new check codes are calculated at the moment in order to avoid the accidental data transmission as much as possible, and the data packets are continuously compared with the check codes in the data packets until the check codes are matched correctly.
5. The method for storing and retrieving display screen characteristic data according to claim 1, wherein the testing device is a camera, and the optical information of the display screen is tested as the characteristic data by the camera.
6. A display screen characteristic data storage and retrieval system, comprising:
the memory deployment module is used for deploying the NVM memory on the driving chip of the display screen;
the data storage module is used for acquiring the characteristic data of the display screen through the test equipment when the data is stored, and confusing the characteristic data by using the coding algorithm to obtain a password and a data stream; calculating the check code of the confused data stream, and combining the confused data stream and the check code into a new data packet; transmitting the data to the driving chip through the display screen interface and storing the data in the NVM memory;
the step of using the coding algorithm to obfuscate the feature data to obtain a password and a data stream includes:
the method comprises the steps of generating a data stream by mixing characteristic data through an RC4 encryption algorithm, generating a password of the characteristic data at the same time, restoring the mixed data stream into the characteristic data by the password, and sending the password to a factory with a demand for calling the characteristic data;
the calculating the check code of the confused data stream comprises the following steps: calculating the check code of the confused data stream through a CRC check algorithm;
and the data calling module is used for reading the data packet through the display screen interface when the data is called, recalculating the check code according to the data flow in the data packet, judging whether the check code is matched, reversely calculating the characteristic data through the password if the check code is matched, and recalculating the data packet and calculating the check code if the check code is not matched, and continuing to match.
7. An electronic device comprising a processor and a memory; the memory stores a program that is loaded and executed by the processor to implement a display screen characteristic data storage and retrieval method as claimed in any one of claims 1 to 5.
8. A computer readable storage medium, wherein a program is stored in the storage medium, which program, when executed by a processor, is adapted to carry out a method of storing and retrieving display characteristic data according to any one of claims 1 to 5.
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| CN114741231A (en) * | 2022-04-19 | 2022-07-12 | 深圳鲲云信息科技有限公司 | Data read-write method, device and equipment based on memory and storage medium |
| CN115904250A (en) * | 2022-12-30 | 2023-04-04 | 深圳市英维克信息技术有限公司 | Data reading and writing method and device, storage device and readable storage medium |
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| US9590808B2 (en) * | 2014-12-08 | 2017-03-07 | International Business Machines Corporation | Obfuscated passwords |
| CN109800104A (en) * | 2018-12-18 | 2019-05-24 | 盛科网络（苏州）有限公司 | Detection method, device, storage medium and the electronic device of data storage |
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| CN114741231A (en) * | 2022-04-19 | 2022-07-12 | 深圳鲲云信息科技有限公司 | Data read-write method, device and equipment based on memory and storage medium |
| CN115904250A (en) * | 2022-12-30 | 2023-04-04 | 深圳市英维克信息技术有限公司 | Data reading and writing method and device, storage device and readable storage medium |
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