# US 2020/0401732 A1 · Electronic device with display panel copy protection module and method for determining duplicate display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0401732 A1 - Document ID: US20200401732A1 - Status: Published application - Kind: A1 - Application number: 16/886,491 - Filed: 2020-05-28 - Published: 2020-12-24 - Earliest claimed: 2019-06-19 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Moon Sang HWANG; Weon Jun CHOE; Deok Jun CHOI - Web page: https://patentgrep.com/patent/US20200401732A1 ## CPC - G06F 21/73: by creating or determining hardware identification, e.g. serial numbers - G06F 3/0416: {Control or interface arrangements specially adapted for digitisers} - G06F 7/582: {Pseudo-random number generators} - G06F 21/44: Program or device authentication - G06F 21/45: Structures or tools for the administration of authentication - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 2370/042: for monitor identification - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A method for determining whether or not a display panel is a duplicate is provided. The method includes: generating, by a code generator in an electronic module, a code, the electronic module including a plurality of electronic components; transmitting, by the code generator, the code to each of a first sequence generator in the electronic module and a second sequence generator in a display panel, the display panel being configured to be mounted to the electronic module; generating, by the first sequence generator, a first response value, and transmitting the first response value to a certification component in the electronic module; generating, by the second sequence generator, a second response value, and transmitting the second response value to the certification component; and comparing, by the certification component, the received first response value and the received second response value. ## Claims ### Claim 1 A method for determining whether or not a display panel is a duplicate, the method comprising: generating, by a code generator in an electronic module, a code, the electronic module comprising a plurality of electronic components; transmitting, by the code generator, the code to each of a first sequence generator in the electronic module and a second sequence generator in a display panel, the display panel being configured to be mounted to the electronic module; generating, by the first sequence generator, a first response value, and transmitting the first response value to a certification component in the electronic module; generating, by the second sequence generator, a second response value, and transmitting the second response value to the certification component; and comparing, by the certification component, the received first response value and the received second response value. ### Claim 2 (depends on 1) The method of claim 1, wherein the first sequence generator and the second sequence generator generate the first response value and the second response value by using a linear feedback shift register (LFSR). ### Claim 3 (depends on 2) The method of claim 2, wherein each item of a sequence generated by using the LFSR is a binary number having at least 16 bits. ### Claim 4 (depends on 2) The method of claim 2, wherein the code comprises a seed and a number value. ### Claim 5 (depends on 4) The method of claim 4, wherein a first item of the sequence generated by using the LFSR is generated by moving, to a first cipher of the seed, an output value obtained by inputting two ciphers selected from the seed to an exclusive OR gate, and deleting the last cipher of the seed. ### Claim 6 (depends on 5) The method of claim 5, wherein the first response value and the second response value correspond to an item selected according to the number value from among the items of the sequence generated by using the LFSR. ### Claim 7 (depends on 1) The method of claim 1, wherein each of the first sequence generator and the second sequence generator comprises a multiplexer. ### Claim 8 (depends on 7) The method of claim 7, wherein the multiplexer outputs a j-bit binary item by selecting at least two ciphers from an i-bit binary item, wherein i is a natural number greater than or equal to 2, and wherein j is smaller than i. ### Claim 9 (depends on 1) The method of claim 1, wherein the code generator and the first sequence generator are in a processor of the electronic module, and wherein the second sequence generator is in a driver IC of the display panel. ### Claim 10 (depends on 9) The method of claim 9, wherein the processor is configured to control the driver IC electrically connected thereto. ### Claim 11 (depends on 10) The method of claim 10, wherein, in the comparing, by the certification component, the received first response value and the received second response value, the processor controls the display panel to be operated when the first response value and the second response value are equal to each other, and controls the display panel to not be operated when the first response value and the second response value are different from each other. ### Claim 12 (depends on 1) The method of claim 1, further comprising, between the transmitting of the code and the transmitting of the first response value, generating, by the second sequence generator, a password, and transmitting the password to the first sequence generator. ### Claim 13 (depends on 1) The method of claim 1, wherein the code generator is configured to generate the code based on a GPS coordinate, a current time, a current data, or a one-time pad (OTP). ### Claim 14 An electronic device comprising a processor for transmitting and receiving an electrical signal to and from a display panel, the processor comprising: a code generator configured to generate a code and to transmit the code to the display panel; a first sequence generator configured to output a first response value from the code by using a linear feedback shift register (LFSR); and a certification component configured to receive a second response value from the display panel and to compare the first response value and the second response value. ### Claim 15 (depends on 14) The electronic device of claim 14, wherein the display panel comprises: an interface in the electronic device to transmit and receive the electrical signal; and a second sequence generator configured to output the second response value from the code by using a LFSR. ### Claim 16 (depends on 14) The electronic device of claim 14, wherein the display panel is mounted in the electronic device. ### Claim 17 (depends on 14) The electronic device of claim 14, further comprising a power supply, a camera, a sensor, and a speaker, wherein the power supply, the camera, the sensor, and the speaker are configured to be controlled by the processor. ### Claim 18 A display panel comprising: a power controller; a touch signal controller; a driver IC configured to control the power controller and the touch signal controller; and a second sequence generator in one of the power controller, the touch signal controller, and the driver IC, wherein the second sequence generator is configured to generate a pseudo random number and to transmit the pseudo random number to an external electronic device. ### Claim 19 (depends on 18) The display panel of claim 18, wherein the pseudo random number is generated based on a code received from the external electronic device. ### Claim 20 (depends on 18) The display panel of claim 18, further comprising an interface through which the driver IC is electrically connected to a processor of the external electronic device, wherein the interface is in the external electronic device.