Samsung Display Co., Ltd.

Hyunho Lim

Yoosung Kim

Ok-Kwon Shin

Sehui Jang

Chongguk Lee

Myeong Bin Lim

Myeongbin Lim

Hyunha Yang

Bongho Bae

Hyun Ha Yang

A display apparatus includes: a gamma reference voltage generator, a digital-to-analog converter, an amplifier and a bias voltage applier. The gamma reference voltage generator is configured to generate a gamma reference voltage. The digital-to-analog converter is configured to convert a data signal to a data voltage based on the gamma reference voltage. The amplifier is configured to receive the data voltage from the digital-to-analog converter and to output the data voltage to a data line. The bias voltage applier is configured to output a first bias voltage to the gamma reference voltage generator and to output a second bias voltage to the amplifier. The bias voltage applier is turned off while input image data have a black image.

Display apparatus

A display device including: a display panel including a plurality of pixels; a data driver configured to provide data voltages to the plurality of pixels; and a controller configured to control the data driver, to detect a same data region of the display panel when first image data in a current frame period is the same as second image data in a previous frame period, and not to transfer the first image data to the data driver in the current frame period.

Electronic device including a display device for not transmitting image data during periods having same data and method thereof

A data driving circuit of a display device is disclosed that includes a latch circuit to latch a data signal in response to a latch enable signal and to output a first signal, a level shifter to output a second signal obtained by changing a voltage level of the first signal, a digital-analog converter to output a third signal obtained by converting the second signal into an analog signal, an amplifier to output a fourth signal obtained by amplifying the third signal, a switch to output the fourth signal in a form of an image signal, in response to an output enable signal, and a signal generator to generate the latch enable signal and the output enable signal. The signal generator adjusts a start timing of the active duration of the latch enable signal, such that the active duration of the latch enable signal starts, after the inactive duration of the output enable signal starts.

Data driving circuit and display device having the same

A display device comprises a display panel including a pixel connected to a data line, a power management circuit including a first voltage generating circuit which generates a first driving voltage and provides the first driving voltage to a data driver in a normal mode, a first voltage converter which generates a parking voltage less than the first driving voltage and provides the parking voltage to the data driver in a low power mode, and a second voltage converter which generates a second driving voltage and provides the second driving voltage to the data driver in the low power mode, and a driving controller configured to receive input image data and to control the data driver and the power management circuit. The data driver provides a data voltage to the data line in the normal mode and provides the parking voltage to the data line in the low power mode.

Display device

Display device and a method of operating the display device

A display device includes: a display panel including a plurality of pixels; a power management circuit configured to generate an analog power supply voltage; and a data driver configured to provide a pre-emphasis voltage and a data voltage to the plurality of pixels based on the analog power supply voltage, wherein the display device is configured to adjust a voltage level of the pre-emphasis voltage according to a distance from the data driver to each of the plurality of pixels to which the pre-emphasis voltage is applied, and wherein the display device is configured to adjust a voltage level of the analog power supply voltage according to the adjusted voltage level of the pre-emphasis voltage.

Display device and method of operating a display device

A display apparatus includes a display panel, a gate driver, a data driver and a gamma reference voltage generator. The display panel is configured to display an image based on input image data. The gate driver is configured to output a gate signal to the display panel. The data driver is configured to output a data voltage to the display panel. The gamma reference voltage generator includes a plurality of gamma amplifiers having varied bias currents. The gamma reference voltage generator is configured to generate gamma reference voltages and to output the gamma reference voltages to the data driver.

Growing community of inventors

Yongin-si, South Korea

Hyunho Lim