Samsung Display Co., Ltd.

Jin-Ho Lee

Seung-Ho Park

Man-Bok Cheon

So-Young Kim

Woo-Seok Jang

A method of driving an OLED display device includes receiving image data. A load value is determined for each sub-pixel. A first load value is set to a largest load value determined for each sub-pixel. A first correction factor is calculated that decreases as the first load value increases, when the first load value is greater than a first threshold. A second load value is calculated based on the image data and current contribution weights for the sub-pixels. A second correction factor is calculated that decreases as the second load value increases, when the second load value is greater than a second threshold. Either the first correction factor or the second correction factor is selected. The image data is converted into output image data based on the correction factor. An image corresponding to the output image data is displayed.

Organic light emitting display device and method of driving the same

A display device according to example embodiments includes an image analyzer configured to calculate contrast and load of an image of a frame based on R, G, and B image data input corresponding to the frame, an image processor configured to control a peak control coefficient applied to W image data to adaptively control peak luminance based on the contrast and the load, and to respectively generate R', G&#x2032;, and B&#x2032; image data by subtracting a product of the W image data and the peak control coefficient from each of the R, G, and B image data, a display panel including a plurality of pixels, a data driver configured to generate a data signal based on the R&#x2032;, G&#x2032;, B, and W image data, and to provide the data signal to the display panel, and a scan driver configured to provide a scan signal to the display panel.

Display device and method for controlling peak luminance of the same

A temperature estimating apparatus includes an average data outputting circuit configured to output average data of image data displayed on a display panel. The temperature estimating apparatus further includes a change amount outputting circuit configured to determine a change amount of the average data, and to output an average data change amount. The temperature estimating apparatus additionally includes a luminance outputting circuit configured to convert the average data change amount to a luminance, and to output the luminance. The temperature estimating apparatus further includes a temperature sensor configured to sense an ambient temperature of the display panel, and to output the ambient temperature. The temperature estimating apparatus additionally includes a current temperature outputting circuit configured to determine a current temperature of the display panel based on a previous temperature of the display panel, the luminance and the ambient temperature.

Temperature estimating apparatus, a method of estimating a temperature, and a display system including the temperature estimating apparatus

A luminance compensator in a display device includes a temperature sensor that detects a temperature of a display panel, a temperature estimator that calculates an estimated temperature of each of a plurality of pixel blocks based on an average luminance of each pixel block and the temperature of the display panel, a first weight calculator that detects a displacement of the display panel and calculates a first temperature compensation weight for first compensation pixel blocks of the pixel blocks, the first compensation pixel blocks being adjacent to an upper side of an image pattern area displayed on a portion of the display panel, and a temperature compensator that calculates temperature compensation data by applying the first temperature compensation weight to the estimated temperature to compensate the average luminance, and outputs the temperature compensation data.

Luminance compensator in display device

A display device and a method of driving the same are disclosed. In one aspect, the display device includes a gamma generator configured to generate emission duty data having an emission duty period based on input image data, a panel load calculator configured to calculate a load of the display panel, and a target driving voltage determiner configured to determine a target driving voltage. The display device also includes an emission duty controller configured to adjust the emission duty period and determine a target global current, driver configured to drive the display panel, and a driving voltage generator configured to supply the driving voltage to the display panel, measure driving currents flowing into the display panel, and adjust the driving voltage to include the target driving voltage based on the difference between the sum of the measured driving currents and the target global current.

Growing community of inventors

Cheonan-si, South Korea

Jin-Ho Lee