Samsung Display Co., Ltd.

Hong-Kyu Kim

Po-Yun Park

Jung-Hwan Cho

Gwangsoo Ahn

Jimyoung Seo

Gwang-Soo Ahn

Bonghyun You

Dong-Won Park

Bong-Jun Lee

Jae Wan Park

Yong-Bum Kim

Dong-Hyun Yeo

Myeong Su Kim

Dongwon Park

Ji-Myoung Seo

Ju Hee Lee

Myeongsu Kim

Byungkil Jeon

Ga-Na Kim

Sun-Kwun Son

Seung Han Jo

Gwang Soo Ahn

Jae Yoon Jung

A display device includes a driving controller controlling a data driving circuit and providing a clock signal and a driving voltage in response to an image signal and a control signal received from an external source. The driving controller restores a data enable signal having a display period and a blank period in one frame on the basis of the control signal and sets a voltage level of the driving voltage applied to the gate driving circuit in accordance with a duration of the blank period. During a sequence of frames having a changing frame rate, the driving voltage for each respective frame may be set based on the duration of each respective blank period.

Display device capable of changing frame rate and operating method thereof

In a method of operating a display device supporting a variable frame mode, frame data are received during a constant active period of a frame period including the active period and a variable blank period, the received frame data are written to a frame memory in the active period, the received frame data are outputted to a data driver in the active period to display an image based on the received frame data, a time of the variable blank period is counted, and, when the time of the variable blank period reaches a predetermined threshold blank time, the frame data stored in the frame memory are outputted to the data driver in the variable blank period to display an image based on the frame data stored in the frame memory.

Method of operating a display device supporting a variable frame mode, and the display device

A display panel driving apparatus includes a data driving part, a data driving part and an off voltage controlling part. The data driving part is configured to output a data signal to a data line of a display panel. The gate driving part is configured to output a gate signal to a gate line of the display panel. The off voltage controlling part is configured to receive a first off voltage and a second off voltage applied to the gate driving part to generate the gate signal, measure a leakage current of the gate driving part, and control the first off voltage based on the leakage current. Thus, display quality of a display apparatus including the gate driving part may be improved.

Display panel driving apparatus having an off voltage controlled based on a leakage current, method of driving display panel using the same, and display apparatus having the same

A timing controller resetting circuit including: a resistor connected to an output node from which a reset signal is output and a first voltage source which supplies a first voltage; a capacitor connected to the output node and a second voltage source which supplies a second voltage that is lower than the first voltage; a reference voltage source configured to generate a reference voltage that is lower than the first voltage and higher than the second voltage; a comparator including a first input terminal which receives the first voltage, a second input terminal which receives the reference voltage, and an output terminal which outputs a comparison result signal generated by comparing the first voltage with the reference voltage; and a transistor including a first terminal which is connected to the output node, a second terminal which receives the second voltage, and a gate terminal which receives the comparison result signal.

Timing controller resetting circuit and a display device including the same

A display device includes a display panel including: a plurality of pixels; and a signal controller which generates, on a frame-by-frame basis, a display signal based on an input image signal and a control signal from an outside. The signal controller includes a memory which stores a preset image signal, a receiver which receives the control signal, a clock signal modulator which generates an internal clock signal having a first frequency during a blank period, which is determined based on the control signal in a frame period, and a data processor which reads the preset image signal from the memory in response to the internal clock signal for an image processing.

Display device and driving method of display device

A display panel driving apparatus includes a data driving part, a gate driving part and an off voltage controlling part. The data driving part is configured to output a data signal to a data line of a display panel. The gate driving part is configured to output a gate signal to a gate line of the display panel. The off voltage controlling part is configured to receive a first off voltage and a second off voltage applied to the gate driving part to generate the gate signal, measure a leakage current of the gate driving part, and control the first off voltage based on the leakage current. Thus, display quality of a display apparatus including the gate driving part may be enhanced.

Display panel driving apparatus, method of driving, and display apparatus with first off voltage controlled based on leakage current

A display apparatus includes a display panel comprising a plurality of data lines and a plurality of gate lines crossing the plurality of data lines, a frequency detector configured to receive an input synchronization signal with an input frequency which is varying in a preset frequency range and to count clock cycles of an input frame in the input synchronization signal, and a synchronization signal generator configured to generate an output synchronization signal which has an insertion frame corresponding to a frame of maximum frequency within the preset frequency range and inset the insertion frame in a vertical blanking period of the input frame, based on the clock count.

Display with variable input frequency

A display device includes a signal line disposed on a substrate. A signal input line is disposed on the substrate and connected to a driver. A first insulating layer is disposed on the signal line. A second insulating layer is disposed on the signal input line and the first insulating layer. First contact holes penetrate the first insulating layer and the second insulating layer and expose a portion of the signal line. Second contact holes penetrate the second insulating layer and expose a portion of the signal input line. A connecting member connects the signal line and the signal input line through the first and the second contact holes and is disposed on the second insulating layer. The first and the second contact holes are alternately arranged in the second insulating layer.

Display device

Growing community of inventors

Suwon-si, South Korea

Hong-Kyu Kim