Samsung Display Co., Ltd.

Samsung Displayco., Ltd.

Kihyun Pyun

Eunjin Choi

Seung-Woon Shin

Wonjin Seo

Jang-Mi Lee

Dae-Sik Lee

Heesook Park

Minyoung Park

Jun-Ho Hwang

Moonshik Kang

Min-soo Choi

Yunmi Kim

Jungeon An

Keunoh Kang

Jang-Hoon Kwak

Sung-Mo Yang

Sung-Jun Kim

Sung-In Kang

Siduk Sung

Geonhwi Park

Hyunjoo Seo

Jang-mi Lee

Juhyun Kim

Seungho Park

Jun Pyo Lee

Songyi Han

Gwangsoo Ahn

Kyoungho Lim

Heebum Park

Hyeon-Do Park

Kyung-Hwa Lim

Hyoseok Yun

Sung-mo Yang

Sujin Lee

Jongmin Shim

Kyunho Kim

Taegon Kim

Song Yi Han

Ji Woong Choi

Yoongu Kim

Yu-Chol Kim

Seung Young Choi

Eui-myeong Cho

Yongjae Lee

Myoungseop Song

Sedae Ki

Dae-sik Lee

Jeongdoo Lee

Tongill Kwak

Hyeongseop Im

Yong-jin Shin

Sung-in Kang

Jungmi Yun

Disclosed is a driving controller which includes a luminance controller calculating a load of an input image signal, an overcurrent control determiner comparing the load and a reference load and outputting an enable signal corresponding to a result of comparing the load and the reference load, a current sensor receiving an input current through a first voltage line transferring a first driving voltage, comparing the input current and a reference current in response to the enable signal, and outputting a first signal corresponding to a result of comparing the input current and the reference current, a switching circuit connected between a second voltage line and a first node and adjusting a current flowing between the second voltage line and the first node in response to a gate control signal, and a current controller outputting the gate control signal corresponding to the current in response to the first signal.

Driving controller and display device including the same

A display device may include a display panel including pixels, and a display panel driver. The display panel driver may receive an input image, detect a first pattern from input image data of the input image, determine a luminance weight for each color based on a luminance of the input image of the first pattern and a luminance of a reference image of a second pattern, apply, in response to detecting of the first pattern, the luminance weight to data voltages to determine compensation data voltages, and apply the compensation data voltages to the pixels.

Display device

A display device includes a display panel including pixels, and a panel driver configured to sequentially apply data voltages to the pixels on a row basis in an active period of a frame period, and to perform a sensing operation on at least one pixel of the pixels in a blank period of the frame period. Within the blank period, the panel driver applies a pre-charge data voltage to the at least one pixel after the sensing operation, and applies a previous data voltage to the at least one pixel after a predetermined time from a time point at which the pre-charge data voltage is applied.

Display device and method of operating a display device that performs a sensing operation on at least one pixel in a blank period of a frame period

An electronic device includes: a display panel including an active area including a first region and a second region, a plurality of first circuit films, a plurality of second circuit films, a first circuit board, a second circuit board, a first circuit cable, a second circuit cable, and a main circuit board. The main circuit board includes: a power generation unit, which provides power to the display panel, a first power measurement unit electrically connected to the first circuit cable and the power generation unit, and, which measures a first current provided to the first region, a second power measurement unit electrically connected to the second circuit cable and the power generation unit, and, which measures a second current provided to the second region, and an overcurrent protection unit, which cuts off the power based on the reference current and each of the first and second currents.

Electronic device and electronic device testing method

Provided is a display device comprising a display panel, a driving controller that receives an input image signal and outputs an image data signal, a voltage generator that generates a plurality of gamma voltages in response to a voltage control signal, and a data driving circuit that receives the plurality of gamma voltages and provides a data signal corresponding to the image data signal to the display panel. The driving controller operates between in a normal mode and in a power-saving mode. During the power-saving mode, the driving controller outputs the voltage control signal for changing voltage levels of the plurality of gamma voltages in response to the input image signal and a peak signal. At least one of the plurality of gamma voltages has a first voltage level during the normal mode and has a second voltage level lower than the first voltage level during the power-saving mode.

Driving controller, display device including the same, and operation method of display device

A display apparatus includes a display panel, a power voltage generator, a current sensor, a driving controller and a data driver. The power voltage generator is configured to generate a power voltage and output the power voltage to the display panel. The current sensor is configured to sense a panel current of the display panel and output an overcurrent signal based on the panel current being greater than a threshold value. The driving controller is configured to generate a compensation value based on the overcurrent signal and generate a data signal to which the compensation value is applied. The data driver is configured to generate a data voltage based on the data signal and output the data voltage to the display panel.

Display apparatus and method of driving the same

A display device includes a display panel including a pixel which receives a driving voltage through a first voltage line, a voltage generator which provides the driving voltage which has a first voltage level to the first voltage line and determines a voltage level of the driving voltage based on a voltage control signal, a current sensor which senses a current level of the first voltage line and outputs a current signal corresponding to the sensed current level, and an overcurrent controller which outputs the voltage control signal which changes the voltage level of the driving voltage when a difference value between present and previous current levels of the current signal is a reference value or greater. The voltage level of the driving voltage changes to a second voltage level lower than the first voltage level when the difference value is the reference value or greater.

Disclosed is a display device including a display panel, a voltage generator, a current detector, and a current controller. The display panel includes a pixel for receiving a driving voltage. The voltage generator generates the driving voltage, determines a voltage level of the driving voltage based on a voltage control signal, and performs a protection operation in response to a protection signal. The current detector detects a driving current of the display panel and outputs a current signal corresponding to the detected driving current. The current controller includes a current comparison unit that generates a result signal by comparing a present current level of the current signal from the current detector to a previous current level and a protection operating unit that receives the result signal and outputs the protection signal based on a change in the load and a difference between the target current and the current signal.

A display device includes a display panel including a plurality of pixels, a data driver configured to apply a plurality of data voltages generated based on input image data to the pixels, an initialization voltage generator configured to generate an initialization voltage that initializes a light emitting element included in each of the pixels, a timing controller configured to generate a constant current control signal based on a load of the input image data, and a constant current generator configured to generate and transmit a constant current to the initialization voltage generator in response to the constant current control signal. As a result, the display device may reduce ripple of an initialization voltage by adjusting the initialization voltage according to a load of input image data, and a display device having a desirable signal-to-noise ratio (SNR) characteristic of a sensing operation may be provided.

Display device and method of driving the same

A display apparatus includes: a display panel including: a gate line; a data line; and a pixel electrically connected to the gate line and the data line, and to display a normal image and a compensation image; a gate driver to output a gate signal to the gate line; a data driver to output a data voltage to the data line; and a power voltage generator to vary a level of a gate power voltage based on a compensation duty ratio corresponding to a ratio between a display duration of the normal image and a display duration of the compensation image.

Display apparatus and method of driving display panel using the same

A display device may include a display panel which displays an image based on image data, a power supply which provides a driving voltage to the display panel through a power line, a current sensor which generates first current data including average, minimum, and maximum sensing currents of a first period based on sensing currents generated by sampling a current flowing through the power line at a sampling frequency, generates second current data including average, minimum, and maximum sensing currents of a second period less than the first period based on the sensing currents, and includes a first controller controlling the image data or the power supply based on the second current data, and a timing controller which communicates with the current sensor, and includes a second controller controlling the image data or the power supply based on the first and second current data.

Current sensor and display device including the same

A display device includes a display panel including pixels, a gate driver configured to output a first gate signal for writing data voltages to the pixels and a second gate signal for applying an initialization voltage to the pixels, which have activation levels, to the pixels in a misconnection detection period, a data driver configured to output the data voltages to the pixels in the misconnection detection period, a power voltage generator electrically connected to the data driver through a cable and configured to output a first power voltage to the display panel in the misconnection detection period, and a timing controller electrically connected to the data driver through the cable and configured to perform a protection operation by detecting misconnection of the cable based on the first power voltage in the misconnection detection period.

Display device and method for inspecting the same

A driving controller includes an overcurrent load calculator calculating a load of an input image signal, comparing the load and a reference load, and outputting a first signal corresponding to a first comparison result, an overcurrent reference controller analyzing a grayscale of the input image signal and outputting one of a first reference current signal corresponding to the grayscale and a second reference current signal, whose current level is higher than that of the first reference current signal, as a reference current signal, a current sensor receiving a feedback current signal, comparing a current level of the feedback current signal and a current level of the reference current signal, and outputting a second signal corresponding to a second comparison result, and a voltage controller outputting a voltage control signal for adjusting a voltage level of a driving voltage, based on the first signal and the second signal.

A display device includes pixels which displays an image based on image data, a driving voltage generator which provides a driving voltage to each of the pixels, and a driving voltage controller which calculates block pixel numbers corresponding to first to ngrayscale blocks based on the image data, calculates maximum grayscales with respect to the first to ngrayscale blocks based on the image data, determines a maximum grayscale block among the first to ngrayscale blocks by comparing the block pixel numbers to minimum pixel numbers corresponding to the first to ngrayscale blocks, determines a maximum grayscale with respect to the maximum grayscale block based on the maximum grayscales, calculates a load of the image data, calculates a voltage drop amount of the driving voltage based on the load, and calculates a magnitude of the driving voltage based on the maximum grayscale and the voltage drop amount.

An organic light-emitting diode (OLED) display device includes a display panel including a plurality of pixels, the plurality of pixels being grouped into a plurality of pixel blocks, a nonvolatile memory configured to store previous accumulated block degradation information for the plurality of pixel blocks up to a previous driving period, a controller configured to calculate current block degradation information for the plurality of pixel blocks in a current driving period, to calculate current accumulated block degradation information for the plurality of pixel blocks up to the current driving period by adding the current block degradation information to the previous accumulated block degradation information in response to a power control signal indicating a power-off, and to determine whether a sensing operation for each of the plurality of pixel blocks is to be performed by comparing the current accumulated block degradation information for each of the plurality of pixel blocks with a sensing reference degradation amount, and a sensing circuit configured to selectively perform the sensing operation for each of the plurality of pixel blocks.

Organic light-emitting diode display device performing a sensing operation, and method of sensing degradation of an organic light-emitting diode display device

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Gwangmyeong-si, South Korea

Kihyun Pyun