Samsung Display Co., Ltd.

Samsung Mobile Display Co., Ltd.

Jung-Kook Park

Si-Beak Pyo

Yong-Kyu Jang

Jae-Yong Kim

Sang-wook Kim

Byung-Hoon Chae

Si-Baek Pyo

Seung-Kyun Hong

Sang-Min Lim

Il-Han Lee

An OLED display is disclosed. The display includes a display panel having a luminance level of the display panel, a power supply unit providing first and second power voltages to the display panel, and a gamma reference voltage generator configured to i) generate a compensation gamma reference voltage, ii) detect a voltage level of the first power voltage at a detection point of the display panel, ii) change the compensation gamma reference voltage from a first voltage level to a second voltage level within a frame based at least in part on the detected voltage level, and iv) determine the first voltage level of the compensation gamma reference voltage based at least in part on the luminance level.

Organic light-emitting diode display

An organic light-emitting diode (OLED) display is disclosed. In one aspect, the display includes a display panel including a plurality of pixels, each of the pixels including an OLED and a driving transistor, the OLED configured to emit light based on an emission current, the driving transistor configured to control the emission current based on a data signal applied to a gate electrode of the driving transistor. The display also includes a power supply configured to apply a driving voltage to the pixels, apply an initialization voltage to a first electrode of the OLED, control the driving voltage within a first range, and control the initialization voltage such that a voltage difference between the driving voltage and the initialization voltage is substantially constant.

Organic light-emitting diode (OLED) display and method of setting initialization voltage in the same

A loading effect control device includes a detecting line, a detector, a load controller, and a gamma reference voltage generator. The detecting line is coupled to a first power supply line in a display panel, and the first power supply line provides a first power voltage. The detector measures the first power voltage in the display panel through the detecting line, detects an amount of load of the display panel, and outputs a first voltage corresponding to the detected amount of the load. The load controller determines a control amount of the load based on the detected load amount and a loading effect setting. The gamma reference voltage generator controls a gamma reference voltage based on the control amount of the load.

Loading effect control device and organic light emitting display device having the same

An organic light-emitting diode display is disclosed. In one aspect, the display includes a display panel including a plurality of pixels, a scan driver configured to provide a scan signal to the pixels, and a data driver configured to provide a data signal to the pixels. The display also includes a power supply configured to provide first and second power voltages, respectively having first and second voltage levels, to the pixels, wherein the power supply is further configured to substantially periodically change the second voltage level, and wherein the second voltage level is less than the first voltage level. The display also includes a controller configured to control at least one of the scan driver, the data driver, and the power supply.

An organic light emitting display device is configured to compensate for deterioration of organic light emitting diodes (OLEDs) included in the device. The organic light emitting display device includes: a plurality of pixels; a timing controller for generating a comparison signal to determine a deterioration degree of an OLED included in each of the pixels; a sensing unit for sensing a deterioration information of the OLED; a supply time controller coupled between data lines and a data driver; a compensation unit for controlling the supply time controller so that a supply time of a data signal varies to correspond to the deterioration information and the comparison signal; and a switching unit coupled to the data lines, the sensing unit, and the supply time controller. The switching unit is configured to selectively couple the data lines to the sensing unit or the supply time controller.

Organic light emitting display device and driving method thereof

A luminance correcting system for an organic light emitting display includes an image analyzing unit for analyzing an image on a display unit and for measuring luminance and color coordinates of reference gray level data, a reference offset value setting unit for setting reference offset values of respective color data in the reference gray level data to correspond to an image analysis result obtained by the image analyzing unit, a controller for detecting a difference in reference offset values of at least two color data among the respective color data in the reference gray level data and for comparing the difference with a reference value, and an additional offset value setting unit for setting an additional offset value corresponding to at least one gray level among gray level data excluding the reference gray level data when the difference in the reference offset values is not less than the reference value.

Luminance correcting system and luminance correcting method for organic light emitting display

There is provided an organic light emitting display capable of improving the display quality of a low brightness region. The organic light emitting display includes pixels positioned at intersections of scan lines, emission control lines, and data lines, a converter for receiving data to generate brightness values, a timing controller for extracting emission time values and gamma values to correspond to the brightness values, an emission control line driver for supplying emission control signals to the emission control lines so that emission times of the pixels are controlled to correspond to the emission time values, and a gamma voltage generator for generating gamma voltages corresponding to the gamma values.

Organic light emitting display and method of driving the same

An organic electroluminescent display and method of driving the display are disclosed. The display includes a power supply voltage generator which generates power voltages according to both a temperature of the display and a luminance level setting.

Organic electroluminescent display and method of driving the same

A data driver and an organic light emitting display having the same. The data driver has a switch unit provided between output terminals of respective output buffers that are provided in the data driver and data lines corresponding thereto. Here, the switch unit is also coupled to a source for providing a middle voltage, and allows the output terminals of the output buffers to be coupled to receive the middle voltage before data signals are output from the data driver by the operation of the switch unit, making it possible to improve the slew rate of the output buffer and to reduce power consumption, and an organic light emitting display having the same. The switch unit may includes a first switch coupled between the source for providing the middle voltage and the output terminals, and a second switch coupled between the output terminals and the respective data lines.

Data driver and organic light emitting display having the same

An organic light emitting display device and a power supply for the same. In one embodiment, an organic light emitting display device includes a first module and a second module, each including an organic light emitting display panel and a driving source. A power supply is for supplying a first driving voltage to the first module and a second driving voltage to the second module. A controller is for applying a common control signal and a data signal to the first module and the second module and for applying a selection signal for selecting at least one of the first module or the second module.

Organic light emitting display device and power supply unit for the same

An apparatus for driving an electroluminescence display panel having an icon area where predetermined icons are displayed according to input icon data and a dot-matrix area where variable images are displayed according to input dot-matrix data. A current that is discharged after the dot-matrix area is driven in each horizontal drive period is applied to at least one of driver power supply terminals of the icon area and the dot-matrix area.

Growing community of inventors

Yongin, South Korea

Jung-Kook Park