Sct Technology, Ltd.

Display Systems As

Shahnad Nadershahi

Eric Li

Shang-Kuan Tang

Chun Lu

Wenjie Yang

Yutao Chen

Yi Zhang

Lei Shen

Shean-Yih Chiou

Kjetil Osa Edvardsen

Jianxin Xue

Shoulin Li

Zhifeng Wen

The present disclosure provides devices, circuits, and methods for driving an LED display panel, so as to ensure the delivery of equal global charge at minimum gray scale. In one example, the circuit of the present disclosure includes a current source, a detection module, and a measurement module. The current source is configured to generate a current signal for the LEDs. The detection module is configured to detect a forward voltage of the LEDs in response to a low current applied to the LEDs. The detection module is further configured to hold the detected forward voltage. The measurement module is configured to measure a time period for an anode voltage of the LEDs to rise to the detected forward voltage in response to a display current applied to the LEDs.

Apparatus and method for driving LED display panel

A display device includes a printed circuit board (PCB) having a plurality of light emitting members, an anti-moir&#xe9; member spaced away from the plurality of light emitting members at about a first distance (d), and a frame member receiving the PCB such that the PCB is interposed between the anti-moir&#xe9; and the frame member. The anti-moir&#xe9; member includes a first layer disposed to face the PCB and having a first foil with a randomized pattern surface. The first distance (d) equals L/(2*tan (&#x3b1;)). The second distance (L) is a shortest distance between two adjacent light emitting members. Each of the array of light emitting members has a radiation angle &#x3b1;.

Display device and method for reducing moir&#xe9; effects using the same

An LED display system comprises an LED array and an LED driver circuit. An LED driver circuit comprises components including a phase lock loop, a pulse width modulation engine, a configuration register, a series of gain adjustable fast charge current sources, and a serial input/output interface. The components in this driver circuit may be integrated on a same chip. The LED array may be arranged in a common cathode configuration.

LED display systems

The present disclosure provides a circuit for discharging parasitic capacitance in a display panel with common-anode topology having a plurality of light emitters, as well as a circuit for charging parasitic capacitance in a display panel with common-cathode topology. In the common-cathode topology, the circuit includes a three-terminal device having a gate, a source, and a drain, wherein one of the source and the drain is electrically coupled to a common cathode of the light emitters, and a mechanism for controlling the three-terminal device, the mechanism being electrically coupled to the gate. Shortly after a previously selected light emitter is unselected, the mechanism turns on the three-terminal device to form a conductive path between the source and the drain. The mechanism turns off the three-terminal device after a voltage at the common cathode is increased to a predetermined voltage level or after a maximum period of time lapses.

Circuits for eliminating ghosting phenomena in display panel having light emitters

An LED display system comprises an LED array and an LED driver circuit. An LED driver circuit comprises components including a phase lock loop, a pulse width modulation engine, a configuration register, a gain adjustable fast charge current source, and a serial input/output interface. The components in this driver circuit may be integrated on a same chip. The LED array may be arranged in a common cathode configuration.

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Simi Valley, CA, United States of America

Shahnad Nadershahi