Abstract:
A display device for sequentially displaying a plurality of subframes (images) within one frame period according to an image source signal, the device including: a pixel array including a plurality of pixels; a scale factor generator configured to separately calculate electric current values of the electric to be consumed by each of the plurality of respective subframes (per frame period), and to calculate an initial scale factor by comparing the electric current value with a threshold electric current value, and to generate a correction scale factor (for each among the plurality of subframes) of the first frame by using the initial scale factor and a correction scale factor of a previous frame (previous to the first frame) (and of the same subframe index) corresponding to the initial scale factor; and an image processor configured to convert a gray data of the image source signal of the first frame.
Abstract:
An display device includes a display panel including a plurality of pixels; a scan driver configured to provide scan signals to the pixels; a data driver configured to provide data signals to the pixels; a look-up table (LUT), wherein an efficiency curve indicating a relationship between an accumulated driving time and an efficiency value is stored in the LUT; a lifespan register, wherein an efficiency changing region for deriving the efficiency value of each of the pixels from the LUT is stored in the lifespan register and the lifespan register is configured to accumulatively store deterioration data of the pixels; and a controller configured to derive the accumulated driving time from the lifespan register, to update the efficiency changing region and the LUT based on the accumulated driving time, and to convert input image data into output image data using the efficiency changing region and the LUT.
Abstract:
An organic light emitting display includes a scan driving unit applying scan signals and light emitting control signals through a plurality of scan lines and light emitting control lines, a data driving unit applying data signals through a plurality of data lines, a power supply supplying an electric power to a plurality of power supply entries, a pixel unit including a plurality of pixels receiving the plurality of scan signals, light emitting control signals, data signals, and the electric power to display an image, the pixel unit being divided into a plurality of regions corresponding to the plurality of power supply entries, and a current limiting circuit using data current values accumulated region by region in the plurality of regions to output current limiting signals for limiting brightness of the pixel unit.
Abstract:
An display device includes a display panel including a plurality of pixels; a scan driver configured to provide scan signals to the pixels; a data driver configured to provide data signals to the pixels; a look-up table (LUT), wherein an efficiency curve indicating a relationship between an accumulated driving time and an efficiency value is stored in the LUT; a lifespan register, wherein an efficiency changing region for deriving the efficiency value of each of the pixels from the LUT is stored in the lifespan register and the lifespan register is configured to accumulatively store deterioration data of the pixels; and a controller configured to derive the accumulated driving time from the lifespan register, to update the efficiency changing region and the LUT based on the accumulated driving time, and to convert input image data into output image data using the efficiency changing region and the LUT.
Abstract:
A display device for sequentially displaying a plurality of subframes (images) within one frame period according to an image source signal, the device including: a pixel array including a plurality of pixels; a scale factor generator configured to separately calculate electric current values of the electric to be consumed by each of the plurality of respective subframes (per frame period), and to calculate an initial scale factor by comparing the electric current value with a threshold electric current value, and to generate a correction scale factor (for each among the plurality of subframes) of the first frame by using the initial scale factor and a correction scale factor of a previous frame (previous to the first frame) (and of the same subframe index) corresponding to the initial scale factor; and an image processor configured to convert a gray data of the image source signal of the first frame.