Abstract: The present invention involves a ring code, an encoding method, a method for identifying the ring code, an application method of the ring code, a seal and an electronic file of the seal, wherein contents recorded in the ring code correspond to a electronic file containing the electronic seal or the digital seal, and contents of different electronic files correspond to different ring codes; the ring code comprises an anti-counterfeiting code and a ring encryption area, and the anti-counterfeiting code fills the ring encryption area; an encoding method comprises acquiring data to be encoded, converting the data to be encoded into the anti-counterfeiting code, and filling the anti-counterfeiting code in the ring encryption area; and a method for identifying the ring code comprises acquiring a starting position of the anti-counterfeiting code, segmenting the anti-counterfeiting code from the starting position and expanding the anti-counterfeiting code to form a bar code, and scanning the bar code to obtain data c

Abstract: An encrypted seal and a double encryption method of bar-shaped data, wherein the encrypted seal comprises a graphic text area, a seal frame, and a bar-shaped digital encryption area, wherein both the graphic text area and the bar-shaped digital encryption area are arranged within the seal frame, inside the bar-shaped digital encryption area is filled an encrypted code, the encrypted code records stamped information of a stamped file, different stamped files correspond to different encrypted codes, and the bar-shaped digital encryption area is arranged in a blank area between the graphic text area and the seal frame; the double encryption method of bar-shaped data comprises steps of obtaining a barcode or a character string to be processed, splitting the barcode or the character string to be processed, and re-splicing two code fragments with missing information.

Abstract: An encrypted seal and a double encryption method of bar-shaped data, wherein the encrypted seal includes a graphic text area, a seal frame, and a bar-shaped digital encryption area, wherein both the graphic text area and the bar-shaped digital encryption area are arranged within the seal frame, inside the bar-shaped digital encryption area is filled an encrypted code, the encrypted code records stamped information of a stamped file, different stamped files correspond to different encrypted codes, and the bar-shaped digital encryption area is arranged in a blank area between the graphic text area and the seal frame; the double encryption method of bar-shaped data comprises steps of obtaining a barcode or a character string to be processed, splitting the barcode or the character string to be processed, and re-splicing two code fragments with missing information.

Abstract: The present invention discloses an encrypted seal and a double encryption method of bar-shaped data, wherein the encrypted seal comprises a graphic text area, a seal frame, and a bar-shaped digital encryption area, wherein both the graphic text area and the bar-shaped digital encryption area are arranged within the seal frame, inside the bar-shaped digital encryption area is filled an encrypted code, the encrypted code records stamped information of a stamped file, different stamped files correspond to different encrypted codes, and the bar-shaped digital encryption area is arranged in a blank area between the graphic text area and the seal frame; the double encryption method of bar-shaped data comprises steps of obtaining a barcode or a character string to be processed, splitting the barcode or the character string to be processed, and re-splicing two code fragments with missing information.

Abstract: The present invention involves a ring code, an encoding method, a method for identifying the ring code, an application method of the ring code, a seal and an electronic file of the seal, wherein contents recorded in the ring code correspond to a electronic file containing the electronic seal or the digital seal, and contents of different electronic files correspond to different ring codes; the ring code comprises an anti-counterfeiting code and a ring encryption area, and the anti-counterfeiting code fills the ring encryption area; an encoding method comprises acquiring data to be encoded, converting the data to be encoded into the anti-counterfeiting code, and filling the anti-counterfeiting code in the ring encryption area; and a method for identifying the ring code comprises acquiring a starting position of the anti-counterfeiting code, segmenting the anti-counterfeiting code from the starting position and expanding the anti-counterfeiting code to form a bar code, and scanning the bar code to obtain data c

Abstract: A rotary printing integrated ink box special for seal printing comprises an ink box body (1) with a cylindrical or elliptic cylindrical outer contour, a spray head (6) with a circuit board (5) is arranged outside the ink box body (1), the spray head (6) corresponds to an ink outlet (3), and contacts (7) connected with control lines of the spray head (6) are integrated on the circuit board (5); and a rotary fixed surface of the ink box body (1) is parallel to a rotary injection surface of the spray head (6).

Abstract: An intelligent seal with cloud computing-based anti-forgery capability and a method for using the same. In various embodiments, the seal is provided with a special-shaped anti-forgery mark. All data files and log files are stored collectively at a seal management cloud platform, thereby achieving anti-forgery through cloud computing at the cloud platform, preventing theft and tampering of user data and seal data, allowing real-time query of seal usage information, and enabling third-party verification and anti-forgery of the seal information.

Abstract: A seal printer is provided, which performs printing by driving a nozzle to rotate through a motor in a printer shell, reduces a number of parts in the printer and a volume of the printer is similar to a volume of a traditional seal. The printer is realized to substitute for the traditional seal; meanwhile, a coaxial connection device is arranged in the printer, a structure thereof is simple and has a certain tolerance for an error of the coaxiality, so that the printer is simple to install, and is firm and durable.

Abstract: A rotary printing integrated ink box special for seal printing comprises an ink box body (1) with a cylindrical or elliptic cylindrical outer contour, a spray head (6) with a circuit board (5) is arranged outside the ink box body (1), the spray head (6) corresponds to an ink outlet (3), and contacts (7) connected with control lines of the spray head (6) are integrated on the circuit board (5); and a rotary fixed surface of the ink box body (1) is parallel to a rotary injection surface of the spray head (6).

Abstract: An intelligent seal with cloud computing-based anti-forgery capability and a method for using the same. In various embodiments, the seal is provided with a special-shaped anti-forgery mark. All data files and log files are stored collectively at a seal management cloud platform, thereby achieving anti-forgery through cloud computing at the cloud platform, preventing theft and tampering of user data and seal data, allowing real-time query of seal usage information, and enabling third-party verification and anti-forgery of the seal information.

Abstract: A seal printer is provided, which performs printing by driving a nozzle to rotate through a motor in a printer shell, reduces a number of parts in the printer and a volume of the printer is similar to a volume of a traditional seal. The printer is realized to substitute for the traditional seal; meanwhile, a coaxial connection device is arranged in the printer, a structure thereof is simple and has a certain tolerance for an error of the coaxiality, so that the printer is simple to install, and is firm and durable.

Abstract: A DC-to-DC converter comprises an error amplifier, a comparator, a PWM controller, a power switch unit, and a control signal monitoring circuit. The PWM controller receives a comparison signal from the comparator and generates a digital control signal that controls the power switch unit such that the DC-to-DC converter supplies a regulated voltage onto a load. The control signal monitoring circuit monitors the digital control signal and detects either a heavy load or a light load condition based on characteristics of the digital control signal. Under the light load condition, the monitoring circuit generates a first enabling signal such that the DC-to-DC controller operates in a power-save mode. Under the heavy load condition, the monitoring circuit generates a second enabling signal such that the DC-to-DC controller operates in a normal operation mode. The DC-to-DC converter consumes substantially less power in the power-save mode than in the normal operation mode.

Abstract: A DC-to-DC converter comprises an error amplifier, a comparator, a PWM controller, a power switch unit, and a control signal monitoring circuit. The PWM controller receives a comparison signal from the comparator and generates a digital control signal that controls the power switch unit such that the DC-to-DC converter supplies a regulated voltage onto a load. The control signal monitoring circuit monitors the digital control signal and detects either a heavy load or a light load condition based on characteristics of the digital control signal. Under the light load condition, the monitoring circuit generates a first enabling signal such that the DC-to-DC controller operates in a power-save mode. Under the heavy load condition, the monitoring circuit generates a second enabling signal such that the DC-to-DC controller operates in a normal operation mode. The DC-to-DC converter consumes substantially less power in the power-save mode than in the normal operation mode.

Abstract: A DC-to-DC converter comprises an error amplifier, a comparator, a PWM controller, a power switch unit, and a control signal monitoring circuit. The PWM controller receives a comparison signal from the comparator and generates a digital control signal that controls the power switch unit such that the DC-to-DC converter supplies a regulated voltage onto a load. The control signal monitoring circuit monitors the digital control signal and detects either a heavy load or a light load condition based on characteristics of the digital control signal. Under the light load condition, the monitoring circuit generates a first enabling signal such that the DC-to-DC controller operates in a power-save mode. Under the heavy load condition, the monitoring circuit generates a second enabling signal such that the DC-to-DC controller operates in a normal operation mode. The DC-to-DC converter consumes substantially less power in the power-save mode than in the normal operation mode.

Abstract: A DC-to-DC converter comprises an error amplifier, a comparator, a PWM controller, a power switch unit, and a control signal monitoring circuit. The PWM controller receives a comparison signal from the comparator and generates a digital control signal that controls the power switch unit such that the DC-to-DC converter supplies a regulated voltage onto a load. The control signal monitoring circuit monitors the digital control signal and detects either a heavy load or a light load condition based on characteristics of the digital control signal. Under the light load condition, the monitoring circuit generates a first enabling signal such that the DC-to-DC controller operates in a power-save mode. Under the heavy load condition, the monitoring circuit generates a second enabling signal such that the DC-to-DC controller operates in a normal operation mode. The DC-to-DC converter consumes substantially less power in the power-save mode than in the normal operation mode.

Abstract: A hysteretic DC-DC converter is provided with high switching frequency, good load regulations, and fast load step response and in which the switching frequency is externally adjustable by a novel feedback network that enables substantial independence of duty cycle variation.

Abstract: A hysteretic DC-DC converter is provided with high switching frequency, good load regulations and fast load step response and in which the switching frequency is externally adjustable by a novel feedback network that enables substantial independence of duty cycle variation.