Chipone Technology (beijing) Co., Ltd.

Qian Bi

Yong Wang

Juncheng Geng

Disclosed is a method for adjusting a ghost reduction potential, a row driving circuit and an LED display device. The method is realized by a row driver module, and comprises: receiving, by a row driver chip, an open-circuit detection signal and a short-circuit detection signal from a row driving side of an LED display panel; according to the open-circuit detection signal and the short-circuit detection signal, by the row driver chip, generating a control signal and transmitting the control signal to a multiplexer, thereby controlling the multiplexer to select only the first/second voltage as the ghost reduction potential, select the first voltage and the second voltage as the ghost reduction potential in sequence, or select the second voltage and the first voltage as the ghost reduction potential in sequence, which efficiently solves constant bright problems caused by an open-circuited/short circuited LED lamp bead, i.e., solving open-circuit/short-circuit caterpillar phenomenon.

Method for adjusting ghosting reduction potential, row driving circuit and LED display device

An open circuit detection method and an LED display device are provided, relating to the technical field of LED display, wherein the open circuit detection method includes: supplying an open-circuit detection voltage to any row line to be detected among a plurality of row lines in the LED display device, and pulling down electric potentials of row lines other than the row line to be detected among the plurality of row lines to a first preset value, wherein the first preset value is smaller than an ON-voltage of each of the LED lamp beads and greater than 0; detecting whether the respective column lines include a column line having an electric potential lower than a second preset value, wherein if yes, it is determined that the LED display device has an LED lamp bead in an open circuit state.

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Beijing, China

Qian Bi