Samsung Display Co., Ltd.

Yoosung Kim

Hyunho Lim

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 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.

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Yongin-si, South Korea

Yoosung Kim