Lx Semicon Co., Ltd.

Silicon Works Co., Ltd.

Kyeong Rok Lee

Jong Min Lee

Jang Su Kim

Ji Hwan Kim

Sang Suk Kim

Jong Hyun Yoon

The present embodiment relates to a technology for facilitating an increase of the number of LEDs to be driven by communication of a clock signal between chips forming a daisy chain when driving LEDs. The communication of a clock signal as well as data between chips allows improve the synchronization between the clock signal and data.

LED driving circuit and driving method thereof

An LED driving circuit adjusts a PWM driving frequency in light emitting diode driving, and changes a PWM frequency of an LED driving circuit in response to a frequency of a PWM clock signal delivered externally or internally.

LED driving circuit and its driving method

The present disclosure relates to an LED driving circuit for controlling the voltage of an LED backlight system, and to a technology for controlling the driving voltage of an LED string formed at one end of the LED string through a digital counter by monitoring the output voltage of the LED string.

LED driving circuit and driving method

A current supply circuit according to the present disclosure may include a voltage/current converter configured to convert, into a data current, a data voltage received from a data driving circuit and a first current mirror circuit configured to mirror the data current so that a light-emitting diode (LED) current flows into an LED array. The data current may be adjusted based on a greyscale value of the LED array.

Current supply circuit and display device including the same

The present disclosure relates to an LED driving technique. The present disclosure provides a technique of measuring a time for reaching a forward voltage of a currently driven LED by comparing a forward voltage sensed in a previous scan line and an LED voltage sensed in a current scan line and for compensating for an ON period of a PWM (pulse width modulation) signal by the measured time for reaching the forward voltage.

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Daejeon, South Korea

Kyeong Rok Lee