Samsung Display Co., Ltd.

Samsung Electronics Co., Ltd.

Dae-Sik Lee

Yanguk Nam

Songyi Han

Kihyun Pyun

Keunoh Kang

Sanghyun Lee

Jongjae Lee

Moonshik Kang

Siduk Sung

Yoomi Kim

Sujin Kim

Jong Jae Lee

Jun Pyo Lee

Taegon Im

Min-soo Choi

Jin-won Jang

SeungYoung Choi

Min-Soo Choi

Junghwan Hwang

Gwangsoo Ahn

Seung Young Choi

Eun Chul Shin

Won-hyoung Kang

Ji Youn Seo

Seokhwan Lee

Sang Hyun Lee

Seungho Park

Seok H Lee

Myoung-Soo Kim

Si Duk Sung

Song Yi Han

Youngsup Kwon

Yoongu Kim

Sung-Mo Yang

Hwanwoong Lee

Min-Gyu Kim

Sung Soo Choi

Keun Oh Kang

Young-Sup Kwon

Gwang Soo Ahn

Tae-Gon Im

Eunchul Shin

Geun Hyuk Choi

Young-A Lee

Seyoung Heo

Hwan Woong Lee

Jiyoun Seo

The current disclosure relates to a display device including a display panel including a plurality of pixels, and a plurality of gate lines and a plurality of data lines connected to the plurality of pixels, a gate driver applying a gate signal to the plurality of gate lines, a data driver applying a data signal to the plurality of data lines, and a voltage provider configured to generate a gate-on voltage that is gradually changed in one frame and a kickback voltage that is gradually changed in one frame to transmit the gate-on voltage and the kickback voltage to the gate driver.

Display device having a voltage provider for generating a gate-on voltage and a kickback voltage

A display device may include a timing controller which generates on-clock and off-clock signals, a level shifter which sequentially generates gate clock signals each having a rising edge and a falling edge respectively synchronized with a rising edge of the on-clock signal and a falling edge of the off-clock signal, the gate clock signals having a voltage corresponding to a gate driving voltage, a gate driver generating gate signals based on the gate clock signals, an over-current detector detecting an over-current by sensing a current of each of the gate clock signals at a time point when the falling edge of the on-clock signal is generated in an on-current detection mode, and generates a shutdown signal in response to the detected over-current, and a voltage generator providing the gate driving voltage to the level shifter and stops providing the gate driving voltage in response to the generated shutdown signal.

Display device including level shifter generating gate clock signals synchronized with rising edge and falling edge of clock signal

A display device includes: a display panel including a plurality of pixels, which displays an image; a first circuit board connected to the display panel and which provides a first signal to the display panel; a second circuit board, which provides a second signal to the first circuit board, and a connection board, which electrically connects the first circuit board to the second circuit board and includes a connection portion connected to the first circuit board and the second circuit board. The second circuit board includes a connection detection circuit, which detects a connection status of the connection portion and generates a detection signal.

Display device

A display device includes a display panel which displays an image based on input image data, a driving controller which generates a voltage control signal for adjusting a first power voltage applied to the display panel in an (N+M)-th frame based on a maximum grayscale value of the input image data of an N-th frame, where N is a positive integer, and M is a positive integer, and a power voltage generator which senses a power current applied to the display panel in the (N+M)-th frame, generates a second power voltage based on the voltage control signal, and controls a voltage level of the first power voltage based on the second power voltage and a current level of the power current.

Display device and method of driving the same

A display device includes a display panel including a plurality of pixels, a data driver configured to provide a data signal to the pixels, a scan driver configured to provide a scan signal to the pixels, a power controller configured to provide a driving voltage to the data driver and the scan driver, and a timing controller configured to generate a data control signal that controls the data driver, a scan control signal that controls the scan driver, and a power control signal that controls the power controller based on an image data and a control signal. The power controller determines a transient time that changes the driving voltage from a first voltage level to a second voltage level based on the power control signal.

Display device and electronic device having the same

A display device includes a display panel including a pixel circuit, a display panel driving circuit that drives the display panel, a voltage generating circuit that receives an input power supply voltage when the display device is powered on and generates display panel voltages and driving circuit voltages based on the input power supply voltage, and an over-current protecting circuit that monitors an over-current generated inside the display device and generates a shut-down request signal when the over-current is detected. The voltage generating circuit outputs an initialization voltage at a first time point corresponding to a time point at which the input power supply voltage is received. The display panel driving circuit outputs a scan clock signal at a second time point. The over-current protecting circuit performs a first over-current protecting operation in a power-on monitoring period set between the first time point and the second time point.

Display device and method of performing an over-current protecting operation thereof

Disclosed is an electronic device, which includes a display panel, a data driving circuit, a scan driving circuit, a signal control circuit, and a power supply circuit that trims a first voltage and a second voltage based on a first control value generated based on the first voltage and the second voltage, and the power supply circuit includes a controller that generates the first control value, a sign determining circuit that determines a sign of the first control value based on the first voltage and the second voltage, a plurality of voltage generators that generate a trimming voltage of the first control value based on the first voltage and the second voltage, and a first memory that stores the first control value, and the first control value is a value for controlling the sign determining circuit and each of the plurality of voltage generators.

Electronic device

A gamma voltage generator within a display device includes a plurality of gamma generation circuits that respectively generate a plurality of gamma voltages. At least one gamma generation circuit includes an input circuit configured to receive a first reference voltage and a second reference voltage, a reference voltage select circuit configured to select a reference voltage among the first reference voltage and the second reference voltage by comparing a gamma voltage generated by the at least one gamma generation circuit with the first reference voltage and the second reference voltage, a digital-to-analog conversion circuit configured to generate an analog voltage corresponding to a gamma code based on the reference voltage selected by the reference voltage select circuit, and an output circuit configured to output the gamma voltage based on the analog voltage.

Gamma voltage generator, display driver, display device and method of generating a gamma voltage

A light source apparatus includes a plurality of light source gate lines extending in a first direction, a plurality of light source data lines extending in a second direction crossing the first direction, a plurality of light source emission lines, a plurality of feedback lines and a plurality of light source blocks. At least one of the light source blocks is connected to the light source gate line, the light source data line, the light source emission line and the feedback line.

Light source apparatus, display apparatus including the same and method of compensating luminance difference of the same

A gate clock generator of a display device includes a carry clock generator configured to sequentially generate N carry clock signals based on a carry-on clock signal and a carry-off clock signal, a scan clock generator configured to generate N scan clock signals based on a scan-on clock signal and a scan-off clock signal, and a sensing clock generator configured to generate N sensing clock signals based on a sensing-on clock signal and a sensing-off clock signal. In a multi-clock mode of the display device, during an on period of a K-th carry clock signal, the scan clock generator outputs a K-th scan clock signal such that the K-th scan clock signal has a number of pulses that corresponds to a number of pulses of the scan-on clock signal in the on period of the K-th carry clock signal, and the sensing clock generator outputs a K-th sensing clock signal such that the K-th sensing clock signal has a number of pulses that corresponds to a number of pulses of the sensing-on clock signal in the on period of the K-th carry clock signal.

Gate clock generator and display device

A power voltage generator includes a voltage sensor and a power controller. The voltage sensor is configured to sense a first voltage in a first charge sharing period of a gate clock signal and a second voltage in a second charge sharing period of the gate clock signal. The power breaker is configured to disconnect a power based on the first voltage and the second voltage.

Power voltage generator, display apparatus having the same and method of driving the same

A light emitting device includes a light source panel including light emitting units, and a printed circuit board including a light source driving circuit electrically connected to the light source panel. The light source driving circuit receives a feedback voltage from each of the light emitting units, and compares the feedback voltage with a reference voltage to output a current control signal. Each of the light emitting units includes a light emitting diode connected to a first voltage line, a switching element connected with the light emitting diode and operating in response to the current control signal, and a resistor electrically connected between a feedback node and a second voltage line. The resistor includes a conductive pattern having a predetermined width disposed on the light source panel.

Light emitting device and display device having the same

A power management circuit of a display device includes a voltage information storage comprising a first and second bank storing first and second voltage information corresponding to first and second voltage levels different from each other, a bank select pin receiving a bank select signal, a voltage information selecting circuit selectively outputting the first voltage information stored in the first bank or the second voltage information stored in the second bank in response to the bank select signal received through the bank select pin, and a DC-DC converter generating panel driving voltages having the first voltage levels based on the first voltage information when the first voltage information is output from the voltage information selecting circuit, and generating the panel driving voltages having the second voltage levels based on the second voltage information when the second voltage information is output from the voltage information selecting circuit.

Display device having power management circuit

A display device includes a display panel including a plurality of pixels, a controller which generates a gate reference signal, a gate control circuit which outputs a gate driving signal based on the gate reference signal, and a gate driving circuit which provides gate signals to the plurality of pixels based on the gate driving signal. The gate control circuit includes a protection enable circuit which detects a first period of the gate reference signal, determines whether the period of the gate reference signal is changed, and generates a protection enable signal when the first period of the gate reference signal is not changed, and an over-current protection circuit which generates an over-current occurrence signal by detecting an over-current of the gate driving signal, and stops outputting the gate driving signal based on the over-current occurrence signal and the protection enable signal.

Display device performing an over-current protection operation

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Hwaseong-si, South Korea

Dae-Sik Lee