Superchip LED Display Driver Output Fading Clamp Circuit Patent

Superchip obtained the patent of LED display driver output blanking clamp circuit, through the setting of constant current driver module and blanking module, the driver output blanking clamp circuit has the function of pull-up control and pull-down control. The output blanking pull-up level is precisely adjustable, the pull-up can solve the problem of ghosting, and the pull-down clamp can solve the problem of darkness in the first line, while the output voltage of the constant current driver module can be dynamically adjusted to improve the situation of output short-circuit line brightness. This is of great significance for improving the display uniformity and stability of LED displays, such as in the application of indoor high-definition LED displays, which can provide a better visual experience.

Superchip's patent “An LED display driver output blanking clamp circuit and LED display”, application number CN201810672065.9, date of authorization is May 17, 2024 . The details of the patent are as follows:

• Circuit composition: it includes constant current driver module and the first blanking module. The constant current driver module is connected to the LED display, and has a first output terminal that outputs a drive signal to drive the LED display; the first blanking module accesses a reference voltage signal and a blanking drive signal associated with the level state of the drive signal, and clamps the output voltage of the first output terminal with the reference voltage signal under the trigger of the blanking drive signal.
• Principle of operation and advantage: By setting the first blanking module and the constant current driver module, the drive output blanking clamp circuit has the functions of pull-up control and pull-down control. Among them, the output blanking pull-up level is precisely adjustable, the pull-up can solve the problem of ghosting, and the pull-down clamp can solve the problem of darkness in the first line, and the output voltage of the first output of the constant current driver module can be dynamically adjusted to improve the problem of output short-circuiting line brightness.

This patent helps to improve the display quality and stability of LED display, solves some common display problems, and is of great significance in promoting the development and application of LED display technology. Superchip has been authorized 14 patents this year, an increase of 40% compared with the same period last year. Combined with the financial data of the company's 2023 annual report, the company invested 182 million yuan in R&D in 2023, an increase of 19.29%.