Samsung Display Co., Ltd.

Sang Myeon Han

Seung Ho Park

Jae Hoon Lee

Byoung Kwan An

Joon Hyeok Jeon

Kyoung Ho Lim

Si-Duk Sung

Seok Gyu Ban

Chang Hun Kim

Jun Jin Kong

Hong Rak Son

Seokha Hong

Jong Wook Kim

Hee Sook Park

Chang Kyu Seol

Nam Jae Lim

Jin Ho Lee

Dong Hak Pyo

Baek Woon Lee

Dong Sup Jin

Kyung Sik Joo

Da Ye Moon

A display device includes pixels connected to scan lines and data lines, each pixel including a driving transistor and at least one light emitting element, and a timing controller configured to generate output data using external input data. The timing controller includes a first compensator configured generate first data by correcting the external input data using at least one of optical measurement information, a threshold voltage of each of the driving transistors, mobility information, dimming information, and temperature information, and an afterimage compensator configured to generate second data based on age information of each light emitting element and the first data, generate third data based on a current amount corresponding to the first data and a current amount corresponding to the second data, and generate the age information by accumulating the third data.

Display device and method of driving the same

Provided is a control device connected to a display panel including a controller configured to display images by driving the display panel according to data corresponding to image frames, and a memory connected to the controller. The controller is configured to select at least one of the image frames as a reference image frame, and update stress data corresponding to a partial area of the display panel in the memory based on one image data block selected from image data blocks of the reference image frame.

Control device for driving display panel, display device including the control device, and method of operating the control device

A display device comprises pixels arranged in a display area of a display panel, and a display driver determining whether image data indicates still image characteristics or moving image characteristics and controlling a supply timing of data voltages and pixel driving control signals supplied to the pixels based on the determination result, wherein the display driver selectively adjusts a driving frequency for driving the pixels and a level of a high-potential voltage supplied to the pixels based on as result of grayscale analysis of the image data.

Display device

A display device includes: pixels that receive data voltages corresponding to output grayscales; a sensing circuit that senses electrical states of the pixels to provide sensing information; and a grayscale converter that generates the output grayscales with respect to the pixels based on input grayscales and the sensing information, wherein the grayscale converter predicts a temperature of at least one of the pixels based on the sensing information, calculates a current control amount for the at least one of the pixels based on the predicted temperature and the input grayscales, and calculates the output grayscales for the at least one of the pixels based on the current control amount and the input grayscales.

Predictive display device and driving method thereof

A display device is disclosed that includes pixels, a memory, and a degradation compensator. The pixels include light emitting elements. The memory is operable to store degradation information including degradation degrees of the light emitting elements. The degradation compensator is operable to receive the degradation information and generate output grayscales by changing each of input grayscales of the pixels in proportion to each of the degradation degrees. The degradation compensator includes a degradation information changer for changing the degradation information by decreasing a degradation degree having a variation greater than a threshold value among variations of the degradation degrees.

A display device includes: a display panel including a plurality of pixels; a deterioration compensator that outputs compensation data based on a lifetime value of the plurality of pixels and an input grayscale of input image data; a scan driver that supplies a scan signal to the display panel; and a data driver that supplies a data signal corresponding to the compensation data to the display panel. The deterioration compensator includes a grayscale-current converter that calculates an input current corresponding to the input grayscale.

An image sticking compensation device includes: a deterioration calculator which calculates deterioration data of a current frame based on input image data and sensing frequency information which are received from a timing controller; an accumulator which accumulates the deterioration data and generates age data in which the deterioration data is accumulated; and a compensator which determines a grayscale compensation value corresponding to the age data and an input grayscale value of the input image data, and outputs age compensation data by applying the grayscale compensation value to the input image data. The sensing frequency information includes a frequency of the current frame, and the deterioration data varies in accordance with the frequency of the current frame.

Image sticking compensation device and display device having the same

Provided is a display device. The display device includes pixels including light emitting elements, a weight calculation unit configured to calculate a weight of one of the pixels based on an amount of current flowing therethrough and a number of light emitting elements thereof, a deterioration accumulation unit configured to accumulate a deterioration amount of the one of the pixels based on the weight and previous compensation data thereof, and a data compensation unit configured to generate compensation data to be supplied to the one of the pixels based on the deterioration amount thereof.

A method for restoring deterioration data of a display device, includes: reading deterioration data from a first storage unit; determining whether the deterioration data is abnormal by comparing a first deterioration value of a first block with adjacent deterioration values of adjacent blocks adjacent to the first block; restoring the deterioration data based on a look-up table in which a luminance retention rate according to a degree of deterioration is set and sensing data provided from a sensing unit, when the deterioration data is determined to be abnormal; and generating second image data by compensating for first image data based on the restored deterioration data. The display device includes blocks each including a pixel, the blocks include the first and adjacent blocks, the deterioration data includes deterioration values each representing a degree of deterioration of each of the blocks, and the deterioration values include the first and adjacent deterioration values.

Display device and method for restoring deterioration data of the same

There are provided a display device, driving method and sensing unit thereof, where a display device includes a display unit having pixels connected to signal lines; a sensing unit including at least one current sensor connected to at least one of the signal lines; and a compensator connected between the sensing unit and the display unit, wherein the compensator is configured to: calculate degradation weights for positions of the pixels, based on a sensing current measured by the sensing unit and a predetermined reference current value, update degradation accumulated values for the positions whenever the sensing current is measured, by accumulating degradation degrees in which the degradation weights are reflected, generate compensated grayscale values by compensating input grayscale values based on the updated degradation accumulated values, and output the compensated grayscale values to the pixels.

Display device and driving method thereof

A display device and a method of driving the same. The display device includes a display panel including a plurality of pixels, a degradation compensator configured to output compensation data based on age values of the plurality of pixels and an input grayscale value of input image data, a scan driver configured to supply a scan signal to the display panel, and a data driver configured to supply a data signal corresponding to the compensation data to the display panel. The degradation compensator includes a first compensation unit configured to generate a first compensation grayscale value with reference to the input grayscale value and a first age value, and a second compensation unit configured to generate a second compensation grayscale value with reference to the first compensation grayscale value and the first age value.

A display device includes a display panel including first, second, and third color sub-pixels, a data driver, a scan driver, a power supply to provide a power supply voltage to the display panel, and a controller. The controller includes a pure color index calculator to calculate first through third pure color indexes of first through third sub-pixel data, a pure color index histogram generator to generate first through third high pure color index histograms, and first through third low pure color index histograms, a histogram analyzer to determine first through third effective maximum gray levels for the first through third color sub-pixels according to the first through third high pure color index histograms and the first through third low pure color index histograms, and a power supply voltage controller to determine a voltage level of the power supply voltage according to the first through third effective maximum gray levels.

Display device, and method of determining a power supply voltage

Systems and methods are described for displaying an image during an initial driving period. An exemplary display device includes a timing controller configured to reconstruct compensation reference data from a first memory into a plurality of transmission data, sequentially transmit the plurality of transmission data to a second memory, and display an image on the display panel when partial transmission data of the plurality of transmission data are transmitted and stored to the second memory during the initial driving period.

Display device for improving a display delay and a method of driving the display device

A display device includes a display unit including pixels, a memory to store degradation data of the pixels, a group-setting portion to classify the pixels into degradation regions according to a degradation degree and based on the degradation data, perform a contour-simplifying process with respect to the degradation regions, classify the degradation regions into labeling regions according to proximity of adjacent ones of the degradation regions, and set one of the degradation regions as a reference region, a sensor to sense electric characteristics of the degradation regions and the reference region as they separately emit light, a compensation amount controller to compare the electric characteristics of the degradation regions with electric characteristics of the reference region, and calculate a per-position compensation data corresponding to a position of the labeling regions, and a converter to convert a first image data into a second image data based on the per-position compensation data.

Growing community of inventors

Yongin-si, South Korea

Sang Myeon Han