Samsung Electronics Co., Ltd.

Yonghoon Yu

Hyunwook Lim

Woohyuk Jang

Jinyong Park

Hongki Kwon

Hojun Chung

TaeWoo Kim

Byeongcheol Jang

Hyeonsu Park

Jiheon Ok

Byoungyoon Jang

Joohyuk Yum

Jonghee Na

Jooyoung An

Sewhan Na

To compensate for degeneration of an electroluminescent display device, a method of compensating for the degeneration may include, grouping a plurality of pixels in a display panel into a plurality of pixel blocks arranged in present block rows and present block columns based on initial block boundaries, accumulating block stress values based on input image data, each accumulated block stress value representing a degeneration degree of the pixels included in each pixel block of the plurality of pixel blocks, performing a boundary updating operation on the plurality of pixel blocks, the performing the boundary updating operation including moving present block boundaries of the plurality of pixel blocks to updated block boundaries based on a distribution of the accumulated block stress values, and correcting the input image data based on the accumulated block stress values and the updated block boundaries.

Method of compensating for degeneration of electroluminescent display device and display system performing the same

A display driver circuit receives externally-encoded image data and processes the data using a memory (graphic RAM), an internal encoder, and an external decoder configured to operate on the externally-encoded image data. The processed data is provided to a display device by a source driver of the display driver circuit. Data is processed through the graphic RAM and an internal decoder or the external decoder depending on whether a slice of the data is a currently received update slice, a recently received standby slice, or a still slice.

Display driving circuit and operating method for performing encoding and decoding

Provided are a low-power display driving circuit performing internal encoding and decoding and an operating method thereof. The display driving circuit includes a memory configured to store an input bit stream encoded by an encoder and a controller configured to determine a data path through which output frame data in a second frame period passes according to whether internal encoding is successful in a first frame period, wherein, when the internal encoding is successful, the controller performs internal encoding in the second frame period, stores a generated internal bit stream in the memory, allows the internal bit stream to pass through a low-power path to generate the output frame data, and when the internal encoding fails, the controller generates the output frame data by allowing the input bit stream to pass through a normal path in the second frame period, changes an encoding setting of an internal encoder, and repeats the internal encoding.

Low-power display driving circuit performing internal encoding and decoding and operating method thereof

An electroluminescent display device includes a display panel including pixels, a storage circuit, a luminance compensation circuit and a data driver. The storage circuit stores information on a leakage curve indicating a luminance change value of a target pixel according to a change of an input pixel value of a neighboring pixel, the plurality of pixels including the target pixel and the neighboring pixel. The luminance compensation circuit receives input pixel values corresponding to the pixels and generates compensated pixel values respectively corresponding to the pixels by compensating for lateral leakage based on the leakage curve, where the lateral leakage is caused by leakage currents through a common conduction layer of the pixels. The data driver drives the pixels based on the compensated pixel values. The exact (or close) luminance of the input image is realized by compensating for the luminance distortion.

Electroluminescent display device and method of compensating for luminance in the same

A method of compensating luminance in an electroluminescent display device including a display panel including pixels is provided. A global current value is generated based on input pixel values corresponding to the pixels where the global current value indicates a global current flowing through the display panel. With respect to each of the input pixel values, a global compensation value indicating a global luminance deviation according the global current is generated based on the input pixel value and the global current value. A gamma compensation value indicating a gamma distortion is generated based on the input pixel value where the gamma distortion is caused by compensating the input pixel value. A compensated pixel value is generated based on the input pixel value, the global compensation value and the gamma compensation value.

Electroluminescent display device and method of compensating luminance in the same

Growing community of inventors

Suwon-si, South Korea

Yonghoon Yu