# US 11,122,153 B2 · Low-speed signal photoelectric conversion module for DP interface > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,153 B2 - Document ID: US11122153B2 - Status: Granted - Kind: B2 - Application number: 16/678,123 - Filed: 2019-11-08 - Published: 2021-05-13 - Granted: 2021-09-14 - Earliest claimed: 2019-11-08 - Assignees: Everpro Technologies Company Ltd. - Applicants: EverPro Technologies Company Ltd. - Inventors: Yan Li; Rui Qin; Yufeng Cheng; Hui Jiang; Lihua Wei; Jinkuan Tang - Web page: https://patentgrep.com/patent/US11122153B2 ## CPC - H04L 69/22: Parsing or analysis of headers - H04B 10/25751: {Optical arrangements for CATV or video distribution (adaptations of television systems for optical transmission H04N7/22)} - H04B 10/2589: {Bidirectional transmission} - H04B 10/40: Transceivers - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04N 5/268: Signal distribution or switching - H04N 5/765: Interface circuits between an apparatus for recording and another apparatus - H04N 7/22: Adaptations for optical transmission - H10F 10/174: comprising monocrystalline or polycrystalline materials - Y02E 10/547: Monocrystalline silicon PV cells - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A low-speed signal conversion module for a DP interface is provided, including a protocol parsing module, an encoding module, a decoding module, a sending link, and a receiving link. The protocol parsing module is configured to parse a DP protocol, and send a low-speed signal of the DP interface to the encoding module, or send an output signal of the decoding module to the DP interface. The encoding module is configured to perform encoding in different forms respectively according to different outputs of the protocol parsing module, and transmit the encoded signal to the sending link. In the present invention, different combinations of combined AUX, HPD and null signals are line-encoded respectively according to characteristics of a DP protocol. ## Claims ### Claim 1 A method of low-speed signal conversion for a DP (Display Port) interface, wherein the method is performed by a low-speed signal conversion module comprising a protocol parsing module, an encoding module, a decoding module, a sending link, and a receiving link, the method comprising: parsing, by the protocol parsing module, a DP (Display Port) protocol, and sending a low-speed signal of the DP interface to the encoding module, or sending an output signal of the decoding module to the DP interface; encoding, by the encoding module, in different forms respectively according to different outputs of the protocol parsing module, and transmitting the encoded signal to the sending link, wherein if the signal is a low-level HPD signal, the signal is encoded as a first periodic signal; if the signal is a high-level HPD signal without AUX signal, the signal is encoded as a second periodic signal; and if the signal is an AUX signal plus high-level HPD signal, the AUX signal is output directly; decoding, by the decoding module, a received signal according to a respective rule, and sending the decoded signal to the protocol parsing module, wherein when a first periodic signal is received, the signal is decoded as a low-level HPD signal; when a second periodic signal is received, the signal is decoded as a high-level HPD signal without AUX signal; and when an AUX signal is received, the signal is decoded as an AUX signal plus high-level HPD signal; transmitting, by the sending link, according to the encoded signal sent by the encoding module; and receiving, by the receiving link, the encoded signal sent by the opposite end and transmit the encoded signal to the decoding module. ### Claim 2 (depends on 1) The method of claim 1, wherein when parsing a protocol, the protocol parsing module needs to judge whether a signal transmitted at the current moment is an AUX signal plus high-level HPD signal, a low-level HPD signal, or a high-level HPD signal without AUX signal, and if the signal is an AUX signal plus high-level HPD signal, the protocol parsing module needs to further judge the direction of the AUX signal and send the corresponding AUX and HPD signals to the DP interface or the encoding module. ### Claim 3 (depends on 1) The method of claim 1, wherein a transmission medium of the sending link and the receiving link is copper cable, wireless transmission medium, or optical fiber. ### Claim 4 (depends on 3) The method of claim 3, wherein when the transmission medium of the sending link and the receiving link is optical fiber, the sending link further comprises an electro-optic conversion module, and the receiving link further comprises a photo-electric conversion module, wherein the method further comprises: converting, by the electro-optic conversion module, an electrical signal of the encoding module into an optical signal and send the optical signal, through optical fiber, to the other party communicating through the DP interface; and receiving, by the photo-electric conversion module, through optical fiber, an optical signal transmitted by the other party communicating through the DP interface, converting the optical signal into an electrical signal, and sending the electrical signal to the decoding module. ### Claim 5 (depends on 1) The method of claim 1, wherein the first periodic signal and the second periodic signal have different periods, so that the decoding module can identify different signals and adopt the different signals suitable for high-speed transmission. ### Claim 6 (depends on 5) The method of claim 5, wherein the first periodic signal is a periodic signal at 10 MHz, and the second periodic signal is a periodic signal at 20 MHz. ### Claim 7 (depends on 1) The method of claim 1, wherein the AUX signal is converted from a half-duplex signal into a full-duplex signal by the protocol parsing module before the AUX signal is transmitted. ### Claim 8 A non-transitory computer-readable media containing instructions which when executed on a processor of a low-speed signal conversion system, perform a method of low-speed signal conversion for a DP (Display Port) interface, wherein the low-speed signal conversion system comprises a protocol parsing module, an encoding module, a decoding module, a sending link, and a receiving link, the method comprising: parsing, by the protocol parsing module, a DP (Display Port) protocol, and sending a low-speed signal of the DP interface to the encoding module, or sending an output signal of the decoding module to the DP interface; encoding, by the encoding module, in different forms respectively according to different outputs of the protocol parsing module, and transmitting the encoded signal to the sending link, wherein if the signal is a low-level HPD signal, the signal is encoded as a first periodic signal; if the signal is a high-level HPD signal without AUX signal, the signal is encoded as a second periodic signal; and if the signal is an AUX signal plus high-level HPD signal, the AUX signal is output directly; decoding, by the decoding module, a received signal according to a respective rule, and sending the decoded signal to the protocol parsing module, wherein when a first periodic signal is received, the signal is decoded as a low-level HPD signal; when a second periodic signal is received, the signal is decoded as a high-level HPD signal without AUX signal; and when an AUX signal is received, the signal is decoded as an AUX signal plus high-level HPD signal; transmitting, by the sending link, according to the encoded signal sent by the encoding module; and receiving, by the receiving link, the encoded signal sent by the opposite end and transmit the encoded signal to the decoding module. ### Claim 9 (depends on 8) The non-transitory computer-readable media of claim 8, wherein when parsing a protocol, the protocol parsing module needs to judge whether a signal transmitted at the current moment is an AUX signal plus high-level HPD signal, a low-level HPD signal, or a high-level HPD signal without AUX signal, and if the signal is an AUX signal plus high-level HPD signal, the protocol parsing module needs to further judge the direction of the AUX signal and send the corresponding AUX and HPD signals to the DP interface or the encoding module. ### Claim 10 (depends on 8) The non-transitory computer-readable media of claim 8, wherein a transmission medium of the sending link and the receiving link is copper cable, wireless transmission medium, or optical fiber. ### Claim 11 (depends on 10) The non-transitory computer-readable media of claim 10, wherein when the transmission medium of the sending link and the receiving link is optical fiber, the sending link further comprises an electro-optic conversion module, and the receiving link further comprises a photo-electric conversion module, wherein the method further comprises: converting, by the electro-optic conversion module, an electrical signal of the encoding module into an optical signal and send the optical signal, through optical fiber, to the other party communicating through the DP interface; and receiving, by the photo-electric conversion module, through optical fiber, an optical signal transmitted by the other party communicating through the DP interface, converting the optical signal into an electrical signal, and sending the electrical signal to the decoding module. ### Claim 12 (depends on 8) The non-transitory computer-readable media of claim 8, wherein the first periodic signal and the second periodic signal have different periods, so that the decoding module can identify different signals and adopt the different signals suitable for high-speed transmission. ### Claim 13 (depends on 12) The non-transitory computer-readable media of claim 12, wherein the first periodic signal is a periodic signal at 10 MHz, and the second periodic signal is a periodic signal at 20 MHz. ### Claim 14 (depends on 8) The non-transitory computer-readable media of claim 8, wherein the AUX signal is converted from a half-duplex signal into a full-duplex signal by the protocol parsing module before the AUX signal is transmitted.